2 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
3 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 * and/or sell copies of the Software, and to permit persons to whom the
10 * Software is furnished to do so, subject to the following conditions:
12 * The above copyright notice including the dates of first publication and
13 * either this permission notice or a reference to
14 * http://oss.sgi.com/projects/FreeB/
15 * shall be included in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
21 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
22 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * Except as contained in this notice, the name of Silicon Graphics, Inc.
26 * shall not be used in advertising or otherwise to promote the sale, use or
27 * other dealings in this Software without prior written authorization from
28 * Silicon Graphics, Inc.
37 #include <limits.h> /* UINT_MAX */
51 /* Pixel storage modes */
54 GLint pack_row_length
;
56 GLint pack_skip_pixels
;
58 GLint pack_swap_bytes
;
59 GLint pack_skip_images
;
60 GLint pack_image_height
;
62 GLint unpack_alignment
;
63 GLint unpack_row_length
;
64 GLint unpack_skip_rows
;
65 GLint unpack_skip_pixels
;
66 GLint unpack_lsb_first
;
67 GLint unpack_swap_bytes
;
68 GLint unpack_skip_images
;
69 GLint unpack_image_height
;
72 static int gluBuild1DMipmapLevelsCore(GLenum
, GLint
,
75 GLenum
, GLenum
, GLint
, GLint
, GLint
,
77 static int gluBuild2DMipmapLevelsCore(GLenum
, GLint
,
80 GLenum
, GLenum
, GLint
, GLint
, GLint
,
82 static int gluBuild3DMipmapLevelsCore(GLenum
, GLint
,
83 GLsizei
, GLsizei
, GLsizei
,
84 GLsizei
, GLsizei
, GLsizei
,
85 GLenum
, GLenum
, GLint
, GLint
, GLint
,
89 * internal function declarations
91 static GLfloat
bytes_per_element(GLenum type
);
92 static GLint
elements_per_group(GLenum format
, GLenum type
);
93 static GLint
is_index(GLenum format
);
94 static GLint
image_size(GLint width
, GLint height
, GLenum format
, GLenum type
);
95 static void fill_image(const PixelStorageModes
*,
96 GLint width
, GLint height
, GLenum format
,
97 GLenum type
, GLboolean index_format
,
98 const void *userdata
, GLushort
*newimage
);
99 static void empty_image(const PixelStorageModes
*,
100 GLint width
, GLint height
, GLenum format
,
101 GLenum type
, GLboolean index_format
,
102 const GLushort
*oldimage
, void *userdata
);
103 static void scale_internal(GLint components
, GLint widthin
, GLint heightin
,
104 const GLushort
*datain
,
105 GLint widthout
, GLint heightout
,
108 static void scale_internal_ubyte(GLint components
, GLint widthin
,
109 GLint heightin
, const GLubyte
*datain
,
110 GLint widthout
, GLint heightout
,
111 GLubyte
*dataout
, GLint element_size
,
112 GLint ysize
, GLint group_size
);
113 static void scale_internal_byte(GLint components
, GLint widthin
,
114 GLint heightin
, const GLbyte
*datain
,
115 GLint widthout
, GLint heightout
,
116 GLbyte
*dataout
, GLint element_size
,
117 GLint ysize
, GLint group_size
);
118 static void scale_internal_ushort(GLint components
, GLint widthin
,
119 GLint heightin
, const GLushort
*datain
,
120 GLint widthout
, GLint heightout
,
121 GLushort
*dataout
, GLint element_size
,
122 GLint ysize
, GLint group_size
,
124 static void scale_internal_short(GLint components
, GLint widthin
,
125 GLint heightin
, const GLshort
*datain
,
126 GLint widthout
, GLint heightout
,
127 GLshort
*dataout
, GLint element_size
,
128 GLint ysize
, GLint group_size
,
130 static void scale_internal_uint(GLint components
, GLint widthin
,
131 GLint heightin
, const GLuint
*datain
,
132 GLint widthout
, GLint heightout
,
133 GLuint
*dataout
, GLint element_size
,
134 GLint ysize
, GLint group_size
,
136 static void scale_internal_int(GLint components
, GLint widthin
,
137 GLint heightin
, const GLint
*datain
,
138 GLint widthout
, GLint heightout
,
139 GLint
*dataout
, GLint element_size
,
140 GLint ysize
, GLint group_size
,
142 static void scale_internal_float(GLint components
, GLint widthin
,
143 GLint heightin
, const GLfloat
*datain
,
144 GLint widthout
, GLint heightout
,
145 GLfloat
*dataout
, GLint element_size
,
146 GLint ysize
, GLint group_size
,
149 static int checkMipmapArgs(GLenum
, GLenum
, GLenum
);
150 static GLboolean
legalFormat(GLenum
);
151 static GLboolean
legalType(GLenum
);
152 static GLboolean
isTypePackedPixel(GLenum
);
153 static GLboolean
isLegalFormatForPackedPixelType(GLenum
, GLenum
);
154 static GLboolean
isLegalLevels(GLint
, GLint
, GLint
, GLint
);
155 static void closestFit(GLenum
, GLint
, GLint
, GLint
, GLenum
, GLenum
,
158 /* all extract/shove routines must return double to handle unsigned ints */
159 static GLdouble
extractUbyte(int, const void *);
160 static void shoveUbyte(GLdouble
, int, void *);
161 static GLdouble
extractSbyte(int, const void *);
162 static void shoveSbyte(GLdouble
, int, void *);
163 static GLdouble
extractUshort(int, const void *);
164 static void shoveUshort(GLdouble
, int, void *);
165 static GLdouble
extractSshort(int, const void *);
166 static void shoveSshort(GLdouble
, int, void *);
167 static GLdouble
extractUint(int, const void *);
168 static void shoveUint(GLdouble
, int, void *);
169 static GLdouble
extractSint(int, const void *);
170 static void shoveSint(GLdouble
, int, void *);
171 static GLdouble
extractFloat(int, const void *);
172 static void shoveFloat(GLdouble
, int, void *);
173 static void halveImageSlice(int, GLdouble (*)(int, const void *),
174 void (*)(GLdouble
, int, void *),
176 const void *, void *,
177 GLint
, GLint
, GLint
, GLint
, GLint
);
178 static void halveImage3D(int, GLdouble (*)(int, const void *),
179 void (*)(GLdouble
, int, void *),
181 const void *, void *,
182 GLint
, GLint
, GLint
, GLint
, GLint
);
184 /* packedpixel type scale routines */
185 static void extract332(int,const void *, GLfloat
[]);
186 static void shove332(const GLfloat
[],int ,void *);
187 static void extract233rev(int,const void *, GLfloat
[]);
188 static void shove233rev(const GLfloat
[],int ,void *);
189 static void extract565(int,const void *, GLfloat
[]);
190 static void shove565(const GLfloat
[],int ,void *);
191 static void extract565rev(int,const void *, GLfloat
[]);
192 static void shove565rev(const GLfloat
[],int ,void *);
193 static void extract4444(int,const void *, GLfloat
[]);
194 static void shove4444(const GLfloat
[],int ,void *);
195 static void extract4444rev(int,const void *, GLfloat
[]);
196 static void shove4444rev(const GLfloat
[],int ,void *);
197 static void extract5551(int,const void *, GLfloat
[]);
198 static void shove5551(const GLfloat
[],int ,void *);
199 static void extract1555rev(int,const void *, GLfloat
[]);
200 static void shove1555rev(const GLfloat
[],int ,void *);
201 static void extract8888(int,const void *, GLfloat
[]);
202 static void shove8888(const GLfloat
[],int ,void *);
203 static void extract8888rev(int,const void *, GLfloat
[]);
204 static void shove8888rev(const GLfloat
[],int ,void *);
205 static void extract1010102(int,const void *, GLfloat
[]);
206 static void shove1010102(const GLfloat
[],int ,void *);
207 static void extract2101010rev(int,const void *, GLfloat
[]);
208 static void shove2101010rev(const GLfloat
[],int ,void *);
209 static void scaleInternalPackedPixel(int,
210 void (*)(int, const void *,GLfloat
[]),
211 void (*)(const GLfloat
[],int, void *),
212 GLint
,GLint
, const void *,
213 GLint
,GLint
,void *,GLint
,GLint
,GLint
);
214 static void halveImagePackedPixel(int,
215 void (*)(int, const void *,GLfloat
[]),
216 void (*)(const GLfloat
[],int, void *),
217 GLint
, GLint
, const void *,
218 void *, GLint
, GLint
, GLint
);
219 static void halve1DimagePackedPixel(int,
220 void (*)(int, const void *,GLfloat
[]),
221 void (*)(const GLfloat
[],int, void *),
222 GLint
, GLint
, const void *,
223 void *, GLint
, GLint
, GLint
);
225 static void halve1Dimage_ubyte(GLint
, GLuint
, GLuint
,const GLubyte
*,
226 GLubyte
*, GLint
, GLint
, GLint
);
227 static void halve1Dimage_byte(GLint
, GLuint
, GLuint
,const GLbyte
*, GLbyte
*,
228 GLint
, GLint
, GLint
);
229 static void halve1Dimage_ushort(GLint
, GLuint
, GLuint
, const GLushort
*,
230 GLushort
*, GLint
, GLint
, GLint
, GLint
);
231 static void halve1Dimage_short(GLint
, GLuint
, GLuint
,const GLshort
*, GLshort
*,
232 GLint
, GLint
, GLint
, GLint
);
233 static void halve1Dimage_uint(GLint
, GLuint
, GLuint
, const GLuint
*, GLuint
*,
234 GLint
, GLint
, GLint
, GLint
);
235 static void halve1Dimage_int(GLint
, GLuint
, GLuint
, const GLint
*, GLint
*,
236 GLint
, GLint
, GLint
, GLint
);
237 static void halve1Dimage_float(GLint
, GLuint
, GLuint
, const GLfloat
*, GLfloat
*,
238 GLint
, GLint
, GLint
, GLint
);
240 static GLint
imageSize3D(GLint
, GLint
, GLint
, GLenum
,GLenum
);
241 static void fillImage3D(const PixelStorageModes
*, GLint
, GLint
, GLint
,GLenum
,
242 GLenum
, GLboolean
, const void *, GLushort
*);
243 static void emptyImage3D(const PixelStorageModes
*,
244 GLint
, GLint
, GLint
, GLenum
,
246 const GLushort
*, void *);
247 static void scaleInternal3D(GLint
, GLint
, GLint
, GLint
, const GLushort
*,
248 GLint
, GLint
, GLint
, GLushort
*);
250 static void retrieveStoreModes(PixelStorageModes
*psm
)
252 glGetIntegerv(GL_UNPACK_ALIGNMENT
, &psm
->unpack_alignment
);
253 glGetIntegerv(GL_UNPACK_ROW_LENGTH
, &psm
->unpack_row_length
);
254 glGetIntegerv(GL_UNPACK_SKIP_ROWS
, &psm
->unpack_skip_rows
);
255 glGetIntegerv(GL_UNPACK_SKIP_PIXELS
, &psm
->unpack_skip_pixels
);
256 glGetIntegerv(GL_UNPACK_LSB_FIRST
, &psm
->unpack_lsb_first
);
257 glGetIntegerv(GL_UNPACK_SWAP_BYTES
, &psm
->unpack_swap_bytes
);
259 glGetIntegerv(GL_PACK_ALIGNMENT
, &psm
->pack_alignment
);
260 glGetIntegerv(GL_PACK_ROW_LENGTH
, &psm
->pack_row_length
);
261 glGetIntegerv(GL_PACK_SKIP_ROWS
, &psm
->pack_skip_rows
);
262 glGetIntegerv(GL_PACK_SKIP_PIXELS
, &psm
->pack_skip_pixels
);
263 glGetIntegerv(GL_PACK_LSB_FIRST
, &psm
->pack_lsb_first
);
264 glGetIntegerv(GL_PACK_SWAP_BYTES
, &psm
->pack_swap_bytes
);
267 static void retrieveStoreModes3D(PixelStorageModes
*psm
)
269 glGetIntegerv(GL_UNPACK_ALIGNMENT
, &psm
->unpack_alignment
);
270 glGetIntegerv(GL_UNPACK_ROW_LENGTH
, &psm
->unpack_row_length
);
271 glGetIntegerv(GL_UNPACK_SKIP_ROWS
, &psm
->unpack_skip_rows
);
272 glGetIntegerv(GL_UNPACK_SKIP_PIXELS
, &psm
->unpack_skip_pixels
);
273 glGetIntegerv(GL_UNPACK_LSB_FIRST
, &psm
->unpack_lsb_first
);
274 glGetIntegerv(GL_UNPACK_SWAP_BYTES
, &psm
->unpack_swap_bytes
);
275 glGetIntegerv(GL_UNPACK_SKIP_IMAGES
, &psm
->unpack_skip_images
);
276 glGetIntegerv(GL_UNPACK_IMAGE_HEIGHT
, &psm
->unpack_image_height
);
278 glGetIntegerv(GL_PACK_ALIGNMENT
, &psm
->pack_alignment
);
279 glGetIntegerv(GL_PACK_ROW_LENGTH
, &psm
->pack_row_length
);
280 glGetIntegerv(GL_PACK_SKIP_ROWS
, &psm
->pack_skip_rows
);
281 glGetIntegerv(GL_PACK_SKIP_PIXELS
, &psm
->pack_skip_pixels
);
282 glGetIntegerv(GL_PACK_LSB_FIRST
, &psm
->pack_lsb_first
);
283 glGetIntegerv(GL_PACK_SWAP_BYTES
, &psm
->pack_swap_bytes
);
284 glGetIntegerv(GL_PACK_SKIP_IMAGES
, &psm
->pack_skip_images
);
285 glGetIntegerv(GL_PACK_IMAGE_HEIGHT
, &psm
->pack_image_height
);
288 static int computeLog(GLuint value
)
295 if (value
== 0) return -1;
300 if (value
!= 1) return -1;
309 ** Compute the nearest power of 2 number. This algorithm is a little
310 ** strange, but it works quite well.
312 static int nearestPower(GLuint value
)
319 if (value
== 0) return -1;
324 } else if (value
== 3) {
332 #define __GLU_SWAP_2_BYTES(s)\
333 (GLushort)(((GLushort)((const GLubyte*)(s))[1])<<8 | ((const GLubyte*)(s))[0])
335 #define __GLU_SWAP_4_BYTES(s)\
336 (GLuint)(((GLuint)((const GLubyte*)(s))[3])<<24 | \
337 ((GLuint)((const GLubyte*)(s))[2])<<16 | \
338 ((GLuint)((const GLubyte*)(s))[1])<<8 | ((const GLubyte*)(s))[0])
340 static void halveImage(GLint components
, GLuint width
, GLuint height
,
341 const GLushort
*datain
, GLushort
*dataout
)
344 int newwidth
, newheight
;
349 newwidth
= width
/ 2;
350 newheight
= height
/ 2;
351 delta
= width
* components
;
356 for (i
= 0; i
< newheight
; i
++) {
357 for (j
= 0; j
< newwidth
; j
++) {
358 for (k
= 0; k
< components
; k
++) {
359 s
[0] = (t
[0] + t
[components
] + t
[delta
] +
360 t
[delta
+components
] + 2) / 4;
369 static void halveImage_ubyte(GLint components
, GLuint width
, GLuint height
,
370 const GLubyte
*datain
, GLubyte
*dataout
,
371 GLint element_size
, GLint ysize
, GLint group_size
)
374 int newwidth
, newheight
;
379 /* handle case where there is only 1 column/row */
380 if (width
== 1 || height
== 1) {
381 assert( !(width
== 1 && height
== 1) ); /* can't be 1x1 */
382 halve1Dimage_ubyte(components
,width
,height
,datain
,dataout
,
383 element_size
,ysize
,group_size
);
387 newwidth
= width
/ 2;
388 newheight
= height
/ 2;
389 padBytes
= ysize
- (width
*group_size
);
391 t
= (const char *)datain
;
394 for (i
= 0; i
< newheight
; i
++) {
395 for (j
= 0; j
< newwidth
; j
++) {
396 for (k
= 0; k
< components
; k
++) {
397 s
[0] = (*(const GLubyte
*)t
+
398 *(const GLubyte
*)(t
+group_size
) +
399 *(const GLubyte
*)(t
+ysize
) +
400 *(const GLubyte
*)(t
+ysize
+group_size
) + 2) / 4;
401 s
++; t
+= element_size
;
411 static void halve1Dimage_ubyte(GLint components
, GLuint width
, GLuint height
,
412 const GLubyte
*dataIn
, GLubyte
*dataOut
,
413 GLint element_size
, GLint ysize
,
416 GLint halfWidth
= width
/ 2;
417 GLint halfHeight
= height
/ 2;
418 const char *src
= (const char *) dataIn
;
419 GLubyte
*dest
= dataOut
;
422 assert(width
== 1 || height
== 1); /* must be 1D */
423 assert(width
!= height
); /* can't be square */
425 if (height
== 1) { /* 1 row */
426 assert(width
!= 1); /* widthxheight can't be 1x1 */
429 for (jj
= 0; jj
< halfWidth
; jj
++) {
431 for (kk
= 0; kk
< components
; kk
++) {
432 *dest
= (*(const GLubyte
*)src
+
433 *(const GLubyte
*)(src
+group_size
)) / 2;
438 src
+= group_size
; /* skip to next 2 */
441 int padBytes
= ysize
- (width
*group_size
);
442 src
+= padBytes
; /* for assertion only */
445 else if (width
== 1) { /* 1 column */
446 int padBytes
= ysize
- (width
* group_size
);
447 assert(height
!= 1); /* widthxheight can't be 1x1 */
449 /* one vertical column with possible pad bytes per row */
450 /* average two at a time */
452 for (jj
= 0; jj
< halfHeight
; jj
++) {
454 for (kk
= 0; kk
< components
; kk
++) {
455 *dest
= (*(const GLubyte
*)src
+ *(const GLubyte
*)(src
+ysize
)) / 2;
460 src
+= padBytes
; /* add pad bytes, if any, to get to end to row */
465 assert(src
== &((const char *)dataIn
)[ysize
*height
]);
466 assert((char *)dest
== &((char *)dataOut
)
467 [components
* element_size
* halfWidth
* halfHeight
]);
468 } /* halve1Dimage_ubyte() */
470 static void halveImage_byte(GLint components
, GLuint width
, GLuint height
,
471 const GLbyte
*datain
, GLbyte
*dataout
,
473 GLint ysize
, GLint group_size
)
476 int newwidth
, newheight
;
481 /* handle case where there is only 1 column/row */
482 if (width
== 1 || height
== 1) {
483 assert( !(width
== 1 && height
== 1) ); /* can't be 1x1 */
484 halve1Dimage_byte(components
,width
,height
,datain
,dataout
,
485 element_size
,ysize
,group_size
);
489 newwidth
= width
/ 2;
490 newheight
= height
/ 2;
491 padBytes
= ysize
- (width
*group_size
);
493 t
= (const char *)datain
;
496 for (i
= 0; i
< newheight
; i
++) {
497 for (j
= 0; j
< newwidth
; j
++) {
498 for (k
= 0; k
< components
; k
++) {
499 s
[0] = (*(const GLbyte
*)t
+
500 *(const GLbyte
*)(t
+group_size
) +
501 *(const GLbyte
*)(t
+ysize
) +
502 *(const GLbyte
*)(t
+ysize
+group_size
) + 2) / 4;
503 s
++; t
+= element_size
;
512 static void halve1Dimage_byte(GLint components
, GLuint width
, GLuint height
,
513 const GLbyte
*dataIn
, GLbyte
*dataOut
,
514 GLint element_size
,GLint ysize
, GLint group_size
)
516 GLint halfWidth
= width
/ 2;
517 GLint halfHeight
= height
/ 2;
518 const char *src
= (const char *) dataIn
;
519 GLbyte
*dest
= dataOut
;
522 assert(width
== 1 || height
== 1); /* must be 1D */
523 assert(width
!= height
); /* can't be square */
525 if (height
== 1) { /* 1 row */
526 assert(width
!= 1); /* widthxheight can't be 1x1 */
529 for (jj
= 0; jj
< halfWidth
; jj
++) {
531 for (kk
= 0; kk
< components
; kk
++) {
532 *dest
= (*(const GLbyte
*)src
+ *(const GLbyte
*)(src
+group_size
)) / 2;
537 src
+= group_size
; /* skip to next 2 */
540 int padBytes
= ysize
- (width
*group_size
);
541 src
+= padBytes
; /* for assertion only */
544 else if (width
== 1) { /* 1 column */
545 int padBytes
= ysize
- (width
* group_size
);
546 assert(height
!= 1); /* widthxheight can't be 1x1 */
548 /* one vertical column with possible pad bytes per row */
549 /* average two at a time */
551 for (jj
= 0; jj
< halfHeight
; jj
++) {
553 for (kk
= 0; kk
< components
; kk
++) {
554 *dest
= (*(const GLbyte
*)src
+ *(const GLbyte
*)(src
+ysize
)) / 2;
559 src
+= padBytes
; /* add pad bytes, if any, to get to end to row */
563 assert(src
== &((const char *)dataIn
)[ysize
*height
]);
566 assert((char *)dest
== &((char *)dataOut
)
567 [components
* element_size
* halfWidth
* halfHeight
]);
568 } /* halve1Dimage_byte() */
570 static void halveImage_ushort(GLint components
, GLuint width
, GLuint height
,
571 const GLushort
*datain
, GLushort
*dataout
,
572 GLint element_size
, GLint ysize
, GLint group_size
,
576 int newwidth
, newheight
;
581 /* handle case where there is only 1 column/row */
582 if (width
== 1 || height
== 1) {
583 assert( !(width
== 1 && height
== 1) ); /* can't be 1x1 */
584 halve1Dimage_ushort(components
,width
,height
,datain
,dataout
,
585 element_size
,ysize
,group_size
, myswap_bytes
);
589 newwidth
= width
/ 2;
590 newheight
= height
/ 2;
591 padBytes
= ysize
- (width
*group_size
);
593 t
= (const char *)datain
;
597 for (i
= 0; i
< newheight
; i
++) {
598 for (j
= 0; j
< newwidth
; j
++) {
599 for (k
= 0; k
< components
; k
++) {
600 s
[0] = (*(const GLushort
*)t
+
601 *(const GLushort
*)(t
+group_size
) +
602 *(const GLushort
*)(t
+ysize
) +
603 *(const GLushort
*)(t
+ysize
+group_size
) + 2) / 4;
604 s
++; t
+= element_size
;
612 for (i
= 0; i
< newheight
; i
++) {
613 for (j
= 0; j
< newwidth
; j
++) {
614 for (k
= 0; k
< components
; k
++) {
615 s
[0] = (__GLU_SWAP_2_BYTES(t
) +
616 __GLU_SWAP_2_BYTES(t
+group_size
) +
617 __GLU_SWAP_2_BYTES(t
+ysize
) +
618 __GLU_SWAP_2_BYTES(t
+ysize
+group_size
)+ 2)/4;
619 s
++; t
+= element_size
;
628 static void halve1Dimage_ushort(GLint components
, GLuint width
, GLuint height
,
629 const GLushort
*dataIn
, GLushort
*dataOut
,
630 GLint element_size
, GLint ysize
,
631 GLint group_size
, GLint myswap_bytes
)
633 GLint halfWidth
= width
/ 2;
634 GLint halfHeight
= height
/ 2;
635 const char *src
= (const char *) dataIn
;
636 GLushort
*dest
= dataOut
;
639 assert(width
== 1 || height
== 1); /* must be 1D */
640 assert(width
!= height
); /* can't be square */
642 if (height
== 1) { /* 1 row */
643 assert(width
!= 1); /* widthxheight can't be 1x1 */
646 for (jj
= 0; jj
< halfWidth
; jj
++) {
648 for (kk
= 0; kk
< components
; kk
++) {
650 GLushort ushort
[BOX2
];
652 ushort
[0]= __GLU_SWAP_2_BYTES(src
);
653 ushort
[1]= __GLU_SWAP_2_BYTES(src
+group_size
);
656 ushort
[0]= *(const GLushort
*)src
;
657 ushort
[1]= *(const GLushort
*)(src
+group_size
);
660 *dest
= (ushort
[0] + ushort
[1]) / 2;
664 src
+= group_size
; /* skip to next 2 */
667 int padBytes
= ysize
- (width
*group_size
);
668 src
+= padBytes
; /* for assertion only */
671 else if (width
== 1) { /* 1 column */
672 int padBytes
= ysize
- (width
* group_size
);
673 assert(height
!= 1); /* widthxheight can't be 1x1 */
675 /* one vertical column with possible pad bytes per row */
676 /* average two at a time */
678 for (jj
= 0; jj
< halfHeight
; jj
++) {
680 for (kk
= 0; kk
< components
; kk
++) {
682 GLushort ushort
[BOX2
];
684 ushort
[0]= __GLU_SWAP_2_BYTES(src
);
685 ushort
[1]= __GLU_SWAP_2_BYTES(src
+ysize
);
688 ushort
[0]= *(const GLushort
*)src
;
689 ushort
[1]= *(const GLushort
*)(src
+ysize
);
691 *dest
= (ushort
[0] + ushort
[1]) / 2;
696 src
+= padBytes
; /* add pad bytes, if any, to get to end to row */
700 assert(src
== &((const char *)dataIn
)[ysize
*height
]);
703 assert((char *)dest
== &((char *)dataOut
)
704 [components
* element_size
* halfWidth
* halfHeight
]);
706 } /* halve1Dimage_ushort() */
709 static void halveImage_short(GLint components
, GLuint width
, GLuint height
,
710 const GLshort
*datain
, GLshort
*dataout
,
711 GLint element_size
, GLint ysize
, GLint group_size
,
715 int newwidth
, newheight
;
720 /* handle case where there is only 1 column/row */
721 if (width
== 1 || height
== 1) {
722 assert( !(width
== 1 && height
== 1) ); /* can't be 1x1 */
723 halve1Dimage_short(components
,width
,height
,datain
,dataout
,
724 element_size
,ysize
,group_size
, myswap_bytes
);
728 newwidth
= width
/ 2;
729 newheight
= height
/ 2;
730 padBytes
= ysize
- (width
*group_size
);
732 t
= (const char *)datain
;
736 for (i
= 0; i
< newheight
; i
++) {
737 for (j
= 0; j
< newwidth
; j
++) {
738 for (k
= 0; k
< components
; k
++) {
739 s
[0] = (*(const GLshort
*)t
+
740 *(const GLshort
*)(t
+group_size
) +
741 *(const GLshort
*)(t
+ysize
) +
742 *(const GLshort
*)(t
+ysize
+group_size
) + 2) / 4;
743 s
++; t
+= element_size
;
751 for (i
= 0; i
< newheight
; i
++) {
752 for (j
= 0; j
< newwidth
; j
++) {
753 for (k
= 0; k
< components
; k
++) {
756 b
= __GLU_SWAP_2_BYTES(t
);
757 buf
= *(const GLshort
*)&b
;
758 b
= __GLU_SWAP_2_BYTES(t
+group_size
);
759 buf
+= *(const GLshort
*)&b
;
760 b
= __GLU_SWAP_2_BYTES(t
+ysize
);
761 buf
+= *(const GLshort
*)&b
;
762 b
= __GLU_SWAP_2_BYTES(t
+ysize
+group_size
);
763 buf
+= *(const GLshort
*)&b
;
764 s
[0] = (GLshort
)((buf
+2)/4);
765 s
++; t
+= element_size
;
774 static void halve1Dimage_short(GLint components
, GLuint width
, GLuint height
,
775 const GLshort
*dataIn
, GLshort
*dataOut
,
776 GLint element_size
, GLint ysize
,
777 GLint group_size
, GLint myswap_bytes
)
779 GLint halfWidth
= width
/ 2;
780 GLint halfHeight
= height
/ 2;
781 const char *src
= (const char *) dataIn
;
782 GLshort
*dest
= dataOut
;
785 assert(width
== 1 || height
== 1); /* must be 1D */
786 assert(width
!= height
); /* can't be square */
788 if (height
== 1) { /* 1 row */
789 assert(width
!= 1); /* widthxheight can't be 1x1 */
792 for (jj
= 0; jj
< halfWidth
; jj
++) {
794 for (kk
= 0; kk
< components
; kk
++) {
796 GLshort sshort
[BOX2
];
798 sshort
[0]= __GLU_SWAP_2_BYTES(src
);
799 sshort
[1]= __GLU_SWAP_2_BYTES(src
+group_size
);
802 sshort
[0]= *(const GLshort
*)src
;
803 sshort
[1]= *(const GLshort
*)(src
+group_size
);
806 *dest
= (sshort
[0] + sshort
[1]) / 2;
810 src
+= group_size
; /* skip to next 2 */
813 int padBytes
= ysize
- (width
*group_size
);
814 src
+= padBytes
; /* for assertion only */
817 else if (width
== 1) { /* 1 column */
818 int padBytes
= ysize
- (width
* group_size
);
819 assert(height
!= 1); /* widthxheight can't be 1x1 */
821 /* one vertical column with possible pad bytes per row */
822 /* average two at a time */
824 for (jj
= 0; jj
< halfHeight
; jj
++) {
826 for (kk
= 0; kk
< components
; kk
++) {
828 GLshort sshort
[BOX2
];
830 sshort
[0]= __GLU_SWAP_2_BYTES(src
);
831 sshort
[1]= __GLU_SWAP_2_BYTES(src
+ysize
);
834 sshort
[0]= *(const GLshort
*)src
;
835 sshort
[1]= *(const GLshort
*)(src
+ysize
);
837 *dest
= (sshort
[0] + sshort
[1]) / 2;
842 src
+= padBytes
; /* add pad bytes, if any, to get to end to row */
846 assert(src
== &((const char *)dataIn
)[ysize
*height
]);
849 assert((char *)dest
== &((char *)dataOut
)
850 [components
* element_size
* halfWidth
* halfHeight
]);
852 } /* halve1Dimage_short() */
855 static void halveImage_uint(GLint components
, GLuint width
, GLuint height
,
856 const GLuint
*datain
, GLuint
*dataout
,
857 GLint element_size
, GLint ysize
, GLint group_size
,
861 int newwidth
, newheight
;
866 /* handle case where there is only 1 column/row */
867 if (width
== 1 || height
== 1) {
868 assert( !(width
== 1 && height
== 1) ); /* can't be 1x1 */
869 halve1Dimage_uint(components
,width
,height
,datain
,dataout
,
870 element_size
,ysize
,group_size
, myswap_bytes
);
874 newwidth
= width
/ 2;
875 newheight
= height
/ 2;
876 padBytes
= ysize
- (width
*group_size
);
878 t
= (const char *)datain
;
882 for (i
= 0; i
< newheight
; i
++) {
883 for (j
= 0; j
< newwidth
; j
++) {
884 for (k
= 0; k
< components
; k
++) {
885 /* need to cast to double to hold large unsigned ints */
886 s
[0] = ((double)*(const GLuint
*)t
+
887 (double)*(const GLuint
*)(t
+group_size
) +
888 (double)*(const GLuint
*)(t
+ysize
) +
889 (double)*(const GLuint
*)(t
+ysize
+group_size
))/4 + 0.5;
890 s
++; t
+= element_size
;
899 for (i
= 0; i
< newheight
; i
++) {
900 for (j
= 0; j
< newwidth
; j
++) {
901 for (k
= 0; k
< components
; k
++) {
902 /* need to cast to double to hold large unsigned ints */
904 buf
= (GLdouble
)__GLU_SWAP_4_BYTES(t
) +
905 (GLdouble
)__GLU_SWAP_4_BYTES(t
+group_size
) +
906 (GLdouble
)__GLU_SWAP_4_BYTES(t
+ysize
) +
907 (GLdouble
)__GLU_SWAP_4_BYTES(t
+ysize
+group_size
);
908 s
[0] = (GLuint
)(buf
/4 + 0.5);
910 s
++; t
+= element_size
;
920 static void halve1Dimage_uint(GLint components
, GLuint width
, GLuint height
,
921 const GLuint
*dataIn
, GLuint
*dataOut
,
922 GLint element_size
, GLint ysize
,
923 GLint group_size
, GLint myswap_bytes
)
925 GLint halfWidth
= width
/ 2;
926 GLint halfHeight
= height
/ 2;
927 const char *src
= (const char *) dataIn
;
928 GLuint
*dest
= dataOut
;
931 assert(width
== 1 || height
== 1); /* must be 1D */
932 assert(width
!= height
); /* can't be square */
934 if (height
== 1) { /* 1 row */
935 assert(width
!= 1); /* widthxheight can't be 1x1 */
938 for (jj
= 0; jj
< halfWidth
; jj
++) {
940 for (kk
= 0; kk
< components
; kk
++) {
944 uint
[0]= __GLU_SWAP_4_BYTES(src
);
945 uint
[1]= __GLU_SWAP_4_BYTES(src
+group_size
);
948 uint
[0]= *(const GLuint
*)src
;
949 uint
[1]= *(const GLuint
*)(src
+group_size
);
951 *dest
= ((double)uint
[0]+(double)uint
[1])/2.0;
956 src
+= group_size
; /* skip to next 2 */
959 int padBytes
= ysize
- (width
*group_size
);
960 src
+= padBytes
; /* for assertion only */
963 else if (width
== 1) { /* 1 column */
964 int padBytes
= ysize
- (width
* group_size
);
965 assert(height
!= 1); /* widthxheight can't be 1x1 */
967 /* one vertical column with possible pad bytes per row */
968 /* average two at a time */
970 for (jj
= 0; jj
< halfHeight
; jj
++) {
972 for (kk
= 0; kk
< components
; kk
++) {
976 uint
[0]= __GLU_SWAP_4_BYTES(src
);
977 uint
[1]= __GLU_SWAP_4_BYTES(src
+ysize
);
980 uint
[0]= *(const GLuint
*)src
;
981 uint
[1]= *(const GLuint
*)(src
+ysize
);
983 *dest
= ((double)uint
[0]+(double)uint
[1])/2.0;
988 src
+= padBytes
; /* add pad bytes, if any, to get to end to row */
992 assert(src
== &((const char *)dataIn
)[ysize
*height
]);
995 assert((char *)dest
== &((char *)dataOut
)
996 [components
* element_size
* halfWidth
* halfHeight
]);
998 } /* halve1Dimage_uint() */
1000 static void halveImage_int(GLint components
, GLuint width
, GLuint height
,
1001 const GLint
*datain
, GLint
*dataout
, GLint element_size
,
1002 GLint ysize
, GLint group_size
, GLint myswap_bytes
)
1005 int newwidth
, newheight
;
1010 /* handle case where there is only 1 column/row */
1011 if (width
== 1 || height
== 1) {
1012 assert( !(width
== 1 && height
== 1) ); /* can't be 1x1 */
1013 halve1Dimage_int(components
,width
,height
,datain
,dataout
,
1014 element_size
,ysize
,group_size
, myswap_bytes
);
1018 newwidth
= width
/ 2;
1019 newheight
= height
/ 2;
1020 padBytes
= ysize
- (width
*group_size
);
1022 t
= (const char *)datain
;
1024 /* Piece o' cake! */
1026 for (i
= 0; i
< newheight
; i
++) {
1027 for (j
= 0; j
< newwidth
; j
++) {
1028 for (k
= 0; k
< components
; k
++) {
1029 s
[0] = ((float)*(const GLint
*)t
+
1030 (float)*(const GLint
*)(t
+group_size
) +
1031 (float)*(const GLint
*)(t
+ysize
) +
1032 (float)*(const GLint
*)(t
+ysize
+group_size
))/4 + 0.5;
1033 s
++; t
+= element_size
;
1041 for (i
= 0; i
< newheight
; i
++) {
1042 for (j
= 0; j
< newwidth
; j
++) {
1043 for (k
= 0; k
< components
; k
++) {
1046 b
= __GLU_SWAP_4_BYTES(t
);
1048 b
= __GLU_SWAP_4_BYTES(t
+group_size
);
1050 b
= __GLU_SWAP_4_BYTES(t
+ysize
);
1052 b
= __GLU_SWAP_4_BYTES(t
+ysize
+group_size
);
1054 s
[0] = (GLint
)(buf
/4 + 0.5);
1056 s
++; t
+= element_size
;
1066 static void halve1Dimage_int(GLint components
, GLuint width
, GLuint height
,
1067 const GLint
*dataIn
, GLint
*dataOut
,
1068 GLint element_size
, GLint ysize
,
1069 GLint group_size
, GLint myswap_bytes
)
1071 GLint halfWidth
= width
/ 2;
1072 GLint halfHeight
= height
/ 2;
1073 const char *src
= (const char *) dataIn
;
1074 GLint
*dest
= dataOut
;
1077 assert(width
== 1 || height
== 1); /* must be 1D */
1078 assert(width
!= height
); /* can't be square */
1080 if (height
== 1) { /* 1 row */
1081 assert(width
!= 1); /* widthxheight can't be 1x1 */
1084 for (jj
= 0; jj
< halfWidth
; jj
++) {
1086 for (kk
= 0; kk
< components
; kk
++) {
1090 uint
[0]= __GLU_SWAP_4_BYTES(src
);
1091 uint
[1]= __GLU_SWAP_4_BYTES(src
+group_size
);
1094 uint
[0]= *(const GLuint
*)src
;
1095 uint
[1]= *(const GLuint
*)(src
+group_size
);
1097 *dest
= ((float)uint
[0]+(float)uint
[1])/2.0;
1102 src
+= group_size
; /* skip to next 2 */
1105 int padBytes
= ysize
- (width
*group_size
);
1106 src
+= padBytes
; /* for assertion only */
1109 else if (width
== 1) { /* 1 column */
1110 int padBytes
= ysize
- (width
* group_size
);
1111 assert(height
!= 1); /* widthxheight can't be 1x1 */
1113 /* one vertical column with possible pad bytes per row */
1114 /* average two at a time */
1116 for (jj
= 0; jj
< halfHeight
; jj
++) {
1118 for (kk
= 0; kk
< components
; kk
++) {
1122 uint
[0]= __GLU_SWAP_4_BYTES(src
);
1123 uint
[1]= __GLU_SWAP_4_BYTES(src
+ysize
);
1126 uint
[0]= *(const GLuint
*)src
;
1127 uint
[1]= *(const GLuint
*)(src
+ysize
);
1129 *dest
= ((float)uint
[0]+(float)uint
[1])/2.0;
1134 src
+= padBytes
; /* add pad bytes, if any, to get to end to row */
1138 assert(src
== &((const char *)dataIn
)[ysize
*height
]);
1141 assert((char *)dest
== &((char *)dataOut
)
1142 [components
* element_size
* halfWidth
* halfHeight
]);
1144 } /* halve1Dimage_int() */
1147 static void halveImage_float(GLint components
, GLuint width
, GLuint height
,
1148 const GLfloat
*datain
, GLfloat
*dataout
,
1149 GLint element_size
, GLint ysize
, GLint group_size
,
1153 int newwidth
, newheight
;
1158 /* handle case where there is only 1 column/row */
1159 if (width
== 1 || height
== 1) {
1160 assert( !(width
== 1 && height
== 1) ); /* can't be 1x1 */
1161 halve1Dimage_float(components
,width
,height
,datain
,dataout
,
1162 element_size
,ysize
,group_size
, myswap_bytes
);
1166 newwidth
= width
/ 2;
1167 newheight
= height
/ 2;
1168 padBytes
= ysize
- (width
*group_size
);
1170 t
= (const char *)datain
;
1172 /* Piece o' cake! */
1174 for (i
= 0; i
< newheight
; i
++) {
1175 for (j
= 0; j
< newwidth
; j
++) {
1176 for (k
= 0; k
< components
; k
++) {
1177 s
[0] = (*(const GLfloat
*)t
+
1178 *(const GLfloat
*)(t
+group_size
) +
1179 *(const GLfloat
*)(t
+ysize
) +
1180 *(const GLfloat
*)(t
+ysize
+group_size
)) / 4;
1181 s
++; t
+= element_size
;
1189 for (i
= 0; i
< newheight
; i
++) {
1190 for (j
= 0; j
< newwidth
; j
++) {
1191 for (k
= 0; k
< components
; k
++) {
1192 union { GLuint b
; GLfloat f
; } swapbuf
;
1193 swapbuf
.b
= __GLU_SWAP_4_BYTES(t
);
1195 swapbuf
.b
= __GLU_SWAP_4_BYTES(t
+group_size
);
1197 swapbuf
.b
= __GLU_SWAP_4_BYTES(t
+ysize
);
1199 swapbuf
.b
= __GLU_SWAP_4_BYTES(t
+ysize
+group_size
);
1202 s
++; t
+= element_size
;
1212 static void halve1Dimage_float(GLint components
, GLuint width
, GLuint height
,
1213 const GLfloat
*dataIn
, GLfloat
*dataOut
,
1214 GLint element_size
, GLint ysize
,
1215 GLint group_size
, GLint myswap_bytes
)
1217 GLint halfWidth
= width
/ 2;
1218 GLint halfHeight
= height
/ 2;
1219 const char *src
= (const char *) dataIn
;
1220 GLfloat
*dest
= dataOut
;
1223 assert(width
== 1 || height
== 1); /* must be 1D */
1224 assert(width
!= height
); /* can't be square */
1226 if (height
== 1) { /* 1 row */
1227 assert(width
!= 1); /* widthxheight can't be 1x1 */
1230 for (jj
= 0; jj
< halfWidth
; jj
++) {
1232 for (kk
= 0; kk
< components
; kk
++) {
1234 GLfloat sfloat
[BOX2
];
1236 sfloat
[0]= __GLU_SWAP_4_BYTES(src
);
1237 sfloat
[1]= __GLU_SWAP_4_BYTES(src
+group_size
);
1240 sfloat
[0]= *(const GLfloat
*)src
;
1241 sfloat
[1]= *(const GLfloat
*)(src
+group_size
);
1244 *dest
= (sfloat
[0] + sfloat
[1]) / 2.0;
1248 src
+= group_size
; /* skip to next 2 */
1251 int padBytes
= ysize
- (width
*group_size
);
1252 src
+= padBytes
; /* for assertion only */
1255 else if (width
== 1) { /* 1 column */
1256 int padBytes
= ysize
- (width
* group_size
);
1257 assert(height
!= 1); /* widthxheight can't be 1x1 */
1259 /* one vertical column with possible pad bytes per row */
1260 /* average two at a time */
1262 for (jj
= 0; jj
< halfHeight
; jj
++) {
1264 for (kk
= 0; kk
< components
; kk
++) {
1266 GLfloat sfloat
[BOX2
];
1268 sfloat
[0]= __GLU_SWAP_4_BYTES(src
);
1269 sfloat
[1]= __GLU_SWAP_4_BYTES(src
+ysize
);
1272 sfloat
[0]= *(const GLfloat
*)src
;
1273 sfloat
[1]= *(const GLfloat
*)(src
+ysize
);
1275 *dest
= (sfloat
[0] + sfloat
[1]) / 2.0;
1280 src
+= padBytes
; /* add pad bytes, if any, to get to end to row */
1281 src
+= ysize
; /* skip to odd row */
1285 assert(src
== &((const char *)dataIn
)[ysize
*height
]);
1286 assert((char *)dest
== &((char *)dataOut
)
1287 [components
* element_size
* halfWidth
* halfHeight
]);
1288 } /* halve1Dimage_float() */
1290 static void scale_internal(GLint components
, GLint widthin
, GLint heightin
,
1291 const GLushort
*datain
,
1292 GLint widthout
, GLint heightout
,
1295 float x
, lowx
, highx
, convx
, halfconvx
;
1296 float y
, lowy
, highy
, convy
, halfconvy
;
1297 float xpercent
,ypercent
;
1299 /* Max components in a format is 4, so... */
1302 int i
,j
,k
,yint
,xint
,xindex
,yindex
;
1305 if (widthin
== widthout
*2 && heightin
== heightout
*2) {
1306 halveImage(components
, widthin
, heightin
, datain
, dataout
);
1309 convy
= (float) heightin
/heightout
;
1310 convx
= (float) widthin
/widthout
;
1311 halfconvx
= convx
/2;
1312 halfconvy
= convy
/2;
1313 for (i
= 0; i
< heightout
; i
++) {
1314 y
= convy
* (i
+0.5);
1315 if (heightin
> heightout
) {
1316 highy
= y
+ halfconvy
;
1317 lowy
= y
- halfconvy
;
1322 for (j
= 0; j
< widthout
; j
++) {
1323 x
= convx
* (j
+0.5);
1324 if (widthin
> widthout
) {
1325 highx
= x
+ halfconvx
;
1326 lowx
= x
- halfconvx
;
1333 ** Ok, now apply box filter to box that goes from (lowx, lowy)
1334 ** to (highx, highy) on input data into this pixel on output
1337 totals
[0] = totals
[1] = totals
[2] = totals
[3] = 0.0;
1343 yindex
= (yint
+ heightin
) % heightin
;
1344 if (highy
< yint
+1) {
1345 ypercent
= highy
- y
;
1347 ypercent
= yint
+1 - y
;
1354 xindex
= (xint
+ widthin
) % widthin
;
1355 if (highx
< xint
+1) {
1356 xpercent
= highx
- x
;
1358 xpercent
= xint
+1 - x
;
1361 percent
= xpercent
* ypercent
;
1363 temp
= (xindex
+ (yindex
* widthin
)) * components
;
1364 for (k
= 0; k
< components
; k
++) {
1365 totals
[k
] += datain
[temp
+ k
] * percent
;
1375 temp
= (j
+ (i
* widthout
)) * components
;
1376 for (k
= 0; k
< components
; k
++) {
1377 /* totals[] should be rounded in the case of enlarging an RGB
1378 * ramp when the type is 332 or 4444
1380 dataout
[temp
+ k
] = (totals
[k
]+0.5)/area
;
1386 static void scale_internal_ubyte(GLint components
, GLint widthin
,
1387 GLint heightin
, const GLubyte
*datain
,
1388 GLint widthout
, GLint heightout
,
1389 GLubyte
*dataout
, GLint element_size
,
1390 GLint ysize
, GLint group_size
)
1395 /* Max components in a format is 4, so... */
1400 const char *temp
, *temp0
;
1401 const char *temp_index
;
1404 int lowx_int
, highx_int
, lowy_int
, highy_int
;
1405 float x_percent
, y_percent
;
1406 float lowx_float
, highx_float
, lowy_float
, highy_float
;
1407 float convy_float
, convx_float
;
1408 int convy_int
, convx_int
;
1410 const char *left
, *right
;
1412 if (widthin
== widthout
*2 && heightin
== heightout
*2) {
1413 halveImage_ubyte(components
, widthin
, heightin
,
1414 (const GLubyte
*)datain
, (GLubyte
*)dataout
,
1415 element_size
, ysize
, group_size
);
1418 convy
= (float) heightin
/heightout
;
1419 convx
= (float) widthin
/widthout
;
1420 convy_int
= floor(convy
);
1421 convy_float
= convy
- convy_int
;
1422 convx_int
= floor(convx
);
1423 convx_float
= convx
- convx_int
;
1425 area
= convx
* convy
;
1429 highy_int
= convy_int
;
1430 highy_float
= convy_float
;
1432 for (i
= 0; i
< heightout
; i
++) {
1433 /* Clamp here to be sure we don't read beyond input buffer. */
1434 if (highy_int
>= heightin
)
1435 highy_int
= heightin
- 1;
1438 highx_int
= convx_int
;
1439 highx_float
= convx_float
;
1441 for (j
= 0; j
< widthout
; j
++) {
1444 ** Ok, now apply box filter to box that goes from (lowx, lowy)
1445 ** to (highx, highy) on input data into this pixel on output
1448 totals
[0] = totals
[1] = totals
[2] = totals
[3] = 0.0;
1450 /* calculate the value for pixels in the 1st row */
1451 xindex
= lowx_int
*group_size
;
1452 if((highy_int
>lowy_int
) && (highx_int
>lowx_int
)) {
1454 y_percent
= 1-lowy_float
;
1455 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
1456 percent
= y_percent
* (1-lowx_float
);
1457 for (k
= 0, temp_index
= temp
; k
< components
;
1458 k
++, temp_index
+= element_size
) {
1459 totals
[k
] += (GLubyte
)(*(temp_index
)) * percent
;
1462 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
1464 for (k
= 0, temp_index
= temp
; k
< components
;
1465 k
++, temp_index
+= element_size
) {
1466 totals
[k
] += (GLubyte
)(*(temp_index
)) * y_percent
;
1471 percent
= y_percent
* highx_float
;
1472 for (k
= 0, temp_index
= temp
; k
< components
;
1473 k
++, temp_index
+= element_size
) {
1474 totals
[k
] += (GLubyte
)(*(temp_index
)) * percent
;
1477 /* calculate the value for pixels in the last row */
1478 y_percent
= highy_float
;
1479 percent
= y_percent
* (1-lowx_float
);
1480 temp
= (const char *)datain
+ xindex
+ highy_int
* ysize
;
1481 for (k
= 0, temp_index
= temp
; k
< components
;
1482 k
++, temp_index
+= element_size
) {
1483 totals
[k
] += (GLubyte
)(*(temp_index
)) * percent
;
1485 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
1487 for (k
= 0, temp_index
= temp
; k
< components
;
1488 k
++, temp_index
+= element_size
) {
1489 totals
[k
] += (GLubyte
)(*(temp_index
)) * y_percent
;
1493 percent
= y_percent
* highx_float
;
1494 for (k
= 0, temp_index
= temp
; k
< components
;
1495 k
++, temp_index
+= element_size
) {
1496 totals
[k
] += (GLubyte
)(*(temp_index
)) * percent
;
1500 /* calculate the value for pixels in the 1st and last column */
1501 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
1504 for (k
= 0; k
< components
;
1505 k
++, left
+= element_size
, right
+= element_size
) {
1506 totals
[k
] += (GLubyte
)(*(left
))*(1-lowx_float
)
1507 +(GLubyte
)(*(right
))*highx_float
;
1510 } else if (highy_int
> lowy_int
) {
1511 x_percent
= highx_float
- lowx_float
;
1512 percent
= (1-lowy_float
)*x_percent
;
1513 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
1514 for (k
= 0, temp_index
= temp
; k
< components
;
1515 k
++, temp_index
+= element_size
) {
1516 totals
[k
] += (GLubyte
)(*(temp_index
)) * percent
;
1518 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
1520 for (k
= 0, temp_index
= temp
; k
< components
;
1521 k
++, temp_index
+= element_size
) {
1522 totals
[k
] += (GLubyte
)(*(temp_index
)) * x_percent
;
1525 percent
= x_percent
* highy_float
;
1527 for (k
= 0, temp_index
= temp
; k
< components
;
1528 k
++, temp_index
+= element_size
) {
1529 totals
[k
] += (GLubyte
)(*(temp_index
)) * percent
;
1531 } else if (highx_int
> lowx_int
) {
1532 y_percent
= highy_float
- lowy_float
;
1533 percent
= (1-lowx_float
)*y_percent
;
1534 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
1535 for (k
= 0, temp_index
= temp
; k
< components
;
1536 k
++, temp_index
+= element_size
) {
1537 totals
[k
] += (GLubyte
)(*(temp_index
)) * percent
;
1539 for (l
= lowx_int
+1; l
< highx_int
; l
++) {
1541 for (k
= 0, temp_index
= temp
; k
< components
;
1542 k
++, temp_index
+= element_size
) {
1543 totals
[k
] += (GLubyte
)(*(temp_index
)) * y_percent
;
1547 percent
= y_percent
* highx_float
;
1548 for (k
= 0, temp_index
= temp
; k
< components
;
1549 k
++, temp_index
+= element_size
) {
1550 totals
[k
] += (GLubyte
)(*(temp_index
)) * percent
;
1553 percent
= (highy_float
-lowy_float
)*(highx_float
-lowx_float
);
1554 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
1555 for (k
= 0, temp_index
= temp
; k
< components
;
1556 k
++, temp_index
+= element_size
) {
1557 totals
[k
] += (GLubyte
)(*(temp_index
)) * percent
;
1563 /* this is for the pixels in the body */
1564 temp0
= (const char *)datain
+ xindex
+ group_size
+
1566 for (m
= lowy_int
+1; m
< highy_int
; m
++) {
1568 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
1569 for (k
= 0, temp_index
= temp
; k
< components
;
1570 k
++, temp_index
+= element_size
) {
1571 totals
[k
] += (GLubyte
)(*(temp_index
));
1578 outindex
= (j
+ (i
* widthout
)) * components
;
1579 for (k
= 0; k
< components
; k
++) {
1580 dataout
[outindex
+ k
] = totals
[k
]/area
;
1581 /*printf("totals[%d] = %f\n", k, totals[k]);*/
1583 lowx_int
= highx_int
;
1584 lowx_float
= highx_float
;
1585 highx_int
+= convx_int
;
1586 highx_float
+= convx_float
;
1587 if(highx_float
> 1) {
1592 lowy_int
= highy_int
;
1593 lowy_float
= highy_float
;
1594 highy_int
+= convy_int
;
1595 highy_float
+= convy_float
;
1596 if(highy_float
> 1) {
1603 static void scale_internal_byte(GLint components
, GLint widthin
,
1604 GLint heightin
, const GLbyte
*datain
,
1605 GLint widthout
, GLint heightout
,
1606 GLbyte
*dataout
, GLint element_size
,
1607 GLint ysize
, GLint group_size
)
1612 /* Max components in a format is 4, so... */
1617 const char *temp
, *temp0
;
1618 const char *temp_index
;
1621 int lowx_int
, highx_int
, lowy_int
, highy_int
;
1622 float x_percent
, y_percent
;
1623 float lowx_float
, highx_float
, lowy_float
, highy_float
;
1624 float convy_float
, convx_float
;
1625 int convy_int
, convx_int
;
1627 const char *left
, *right
;
1629 if (widthin
== widthout
*2 && heightin
== heightout
*2) {
1630 halveImage_byte(components
, widthin
, heightin
,
1631 (const GLbyte
*)datain
, (GLbyte
*)dataout
,
1632 element_size
, ysize
, group_size
);
1635 convy
= (float) heightin
/heightout
;
1636 convx
= (float) widthin
/widthout
;
1637 convy_int
= floor(convy
);
1638 convy_float
= convy
- convy_int
;
1639 convx_int
= floor(convx
);
1640 convx_float
= convx
- convx_int
;
1642 area
= convx
* convy
;
1646 highy_int
= convy_int
;
1647 highy_float
= convy_float
;
1649 for (i
= 0; i
< heightout
; i
++) {
1650 /* Clamp here to be sure we don't read beyond input buffer. */
1651 if (highy_int
>= heightin
)
1652 highy_int
= heightin
- 1;
1655 highx_int
= convx_int
;
1656 highx_float
= convx_float
;
1658 for (j
= 0; j
< widthout
; j
++) {
1661 ** Ok, now apply box filter to box that goes from (lowx, lowy)
1662 ** to (highx, highy) on input data into this pixel on output
1665 totals
[0] = totals
[1] = totals
[2] = totals
[3] = 0.0;
1667 /* calculate the value for pixels in the 1st row */
1668 xindex
= lowx_int
*group_size
;
1669 if((highy_int
>lowy_int
) && (highx_int
>lowx_int
)) {
1671 y_percent
= 1-lowy_float
;
1672 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
1673 percent
= y_percent
* (1-lowx_float
);
1674 for (k
= 0, temp_index
= temp
; k
< components
;
1675 k
++, temp_index
+= element_size
) {
1676 totals
[k
] += (GLbyte
)(*(temp_index
)) * percent
;
1679 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
1681 for (k
= 0, temp_index
= temp
; k
< components
;
1682 k
++, temp_index
+= element_size
) {
1683 totals
[k
] += (GLbyte
)(*(temp_index
)) * y_percent
;
1688 percent
= y_percent
* highx_float
;
1689 for (k
= 0, temp_index
= temp
; k
< components
;
1690 k
++, temp_index
+= element_size
) {
1691 totals
[k
] += (GLbyte
)(*(temp_index
)) * percent
;
1694 /* calculate the value for pixels in the last row */
1695 y_percent
= highy_float
;
1696 percent
= y_percent
* (1-lowx_float
);
1697 temp
= (const char *)datain
+ xindex
+ highy_int
* ysize
;
1698 for (k
= 0, temp_index
= temp
; k
< components
;
1699 k
++, temp_index
+= element_size
) {
1700 totals
[k
] += (GLbyte
)(*(temp_index
)) * percent
;
1702 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
1704 for (k
= 0, temp_index
= temp
; k
< components
;
1705 k
++, temp_index
+= element_size
) {
1706 totals
[k
] += (GLbyte
)(*(temp_index
)) * y_percent
;
1710 percent
= y_percent
* highx_float
;
1711 for (k
= 0, temp_index
= temp
; k
< components
;
1712 k
++, temp_index
+= element_size
) {
1713 totals
[k
] += (GLbyte
)(*(temp_index
)) * percent
;
1717 /* calculate the value for pixels in the 1st and last column */
1718 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
1721 for (k
= 0; k
< components
;
1722 k
++, left
+= element_size
, right
+= element_size
) {
1723 totals
[k
] += (GLbyte
)(*(left
))*(1-lowx_float
)
1724 +(GLbyte
)(*(right
))*highx_float
;
1727 } else if (highy_int
> lowy_int
) {
1728 x_percent
= highx_float
- lowx_float
;
1729 percent
= (1-lowy_float
)*x_percent
;
1730 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
1731 for (k
= 0, temp_index
= temp
; k
< components
;
1732 k
++, temp_index
+= element_size
) {
1733 totals
[k
] += (GLbyte
)(*(temp_index
)) * percent
;
1735 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
1737 for (k
= 0, temp_index
= temp
; k
< components
;
1738 k
++, temp_index
+= element_size
) {
1739 totals
[k
] += (GLbyte
)(*(temp_index
)) * x_percent
;
1742 percent
= x_percent
* highy_float
;
1744 for (k
= 0, temp_index
= temp
; k
< components
;
1745 k
++, temp_index
+= element_size
) {
1746 totals
[k
] += (GLbyte
)(*(temp_index
)) * percent
;
1748 } else if (highx_int
> lowx_int
) {
1749 y_percent
= highy_float
- lowy_float
;
1750 percent
= (1-lowx_float
)*y_percent
;
1751 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
1752 for (k
= 0, temp_index
= temp
; k
< components
;
1753 k
++, temp_index
+= element_size
) {
1754 totals
[k
] += (GLbyte
)(*(temp_index
)) * percent
;
1756 for (l
= lowx_int
+1; l
< highx_int
; l
++) {
1758 for (k
= 0, temp_index
= temp
; k
< components
;
1759 k
++, temp_index
+= element_size
) {
1760 totals
[k
] += (GLbyte
)(*(temp_index
)) * y_percent
;
1764 percent
= y_percent
* highx_float
;
1765 for (k
= 0, temp_index
= temp
; k
< components
;
1766 k
++, temp_index
+= element_size
) {
1767 totals
[k
] += (GLbyte
)(*(temp_index
)) * percent
;
1770 percent
= (highy_float
-lowy_float
)*(highx_float
-lowx_float
);
1771 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
1772 for (k
= 0, temp_index
= temp
; k
< components
;
1773 k
++, temp_index
+= element_size
) {
1774 totals
[k
] += (GLbyte
)(*(temp_index
)) * percent
;
1780 /* this is for the pixels in the body */
1781 temp0
= (const char *)datain
+ xindex
+ group_size
+
1783 for (m
= lowy_int
+1; m
< highy_int
; m
++) {
1785 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
1786 for (k
= 0, temp_index
= temp
; k
< components
;
1787 k
++, temp_index
+= element_size
) {
1788 totals
[k
] += (GLbyte
)(*(temp_index
));
1795 outindex
= (j
+ (i
* widthout
)) * components
;
1796 for (k
= 0; k
< components
; k
++) {
1797 dataout
[outindex
+ k
] = totals
[k
]/area
;
1798 /*printf("totals[%d] = %f\n", k, totals[k]);*/
1800 lowx_int
= highx_int
;
1801 lowx_float
= highx_float
;
1802 highx_int
+= convx_int
;
1803 highx_float
+= convx_float
;
1804 if(highx_float
> 1) {
1809 lowy_int
= highy_int
;
1810 lowy_float
= highy_float
;
1811 highy_int
+= convy_int
;
1812 highy_float
+= convy_float
;
1813 if(highy_float
> 1) {
1820 static void scale_internal_ushort(GLint components
, GLint widthin
,
1821 GLint heightin
, const GLushort
*datain
,
1822 GLint widthout
, GLint heightout
,
1823 GLushort
*dataout
, GLint element_size
,
1824 GLint ysize
, GLint group_size
,
1830 /* Max components in a format is 4, so... */
1835 const char *temp
, *temp0
;
1836 const char *temp_index
;
1839 int lowx_int
, highx_int
, lowy_int
, highy_int
;
1840 float x_percent
, y_percent
;
1841 float lowx_float
, highx_float
, lowy_float
, highy_float
;
1842 float convy_float
, convx_float
;
1843 int convy_int
, convx_int
;
1845 const char *left
, *right
;
1847 if (widthin
== widthout
*2 && heightin
== heightout
*2) {
1848 halveImage_ushort(components
, widthin
, heightin
,
1849 (const GLushort
*)datain
, (GLushort
*)dataout
,
1850 element_size
, ysize
, group_size
, myswap_bytes
);
1853 convy
= (float) heightin
/heightout
;
1854 convx
= (float) widthin
/widthout
;
1855 convy_int
= floor(convy
);
1856 convy_float
= convy
- convy_int
;
1857 convx_int
= floor(convx
);
1858 convx_float
= convx
- convx_int
;
1860 area
= convx
* convy
;
1864 highy_int
= convy_int
;
1865 highy_float
= convy_float
;
1867 for (i
= 0; i
< heightout
; i
++) {
1868 /* Clamp here to be sure we don't read beyond input buffer. */
1869 if (highy_int
>= heightin
)
1870 highy_int
= heightin
- 1;
1873 highx_int
= convx_int
;
1874 highx_float
= convx_float
;
1876 for (j
= 0; j
< widthout
; j
++) {
1878 ** Ok, now apply box filter to box that goes from (lowx, lowy)
1879 ** to (highx, highy) on input data into this pixel on output
1882 totals
[0] = totals
[1] = totals
[2] = totals
[3] = 0.0;
1884 /* calculate the value for pixels in the 1st row */
1885 xindex
= lowx_int
*group_size
;
1886 if((highy_int
>lowy_int
) && (highx_int
>lowx_int
)) {
1888 y_percent
= 1-lowy_float
;
1889 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
1890 percent
= y_percent
* (1-lowx_float
);
1891 for (k
= 0, temp_index
= temp
; k
< components
;
1892 k
++, temp_index
+= element_size
) {
1894 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
1896 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
1900 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
1902 for (k
= 0, temp_index
= temp
; k
< components
;
1903 k
++, temp_index
+= element_size
) {
1906 __GLU_SWAP_2_BYTES(temp_index
) * y_percent
;
1908 totals
[k
] += *(const GLushort
*)temp_index
* y_percent
;
1914 percent
= y_percent
* highx_float
;
1915 for (k
= 0, temp_index
= temp
; k
< components
;
1916 k
++, temp_index
+= element_size
) {
1918 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
1920 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
1924 /* calculate the value for pixels in the last row */
1925 y_percent
= highy_float
;
1926 percent
= y_percent
* (1-lowx_float
);
1927 temp
= (const char *)datain
+ xindex
+ highy_int
* ysize
;
1928 for (k
= 0, temp_index
= temp
; k
< components
;
1929 k
++, temp_index
+= element_size
) {
1931 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
1933 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
1936 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
1938 for (k
= 0, temp_index
= temp
; k
< components
;
1939 k
++, temp_index
+= element_size
) {
1942 __GLU_SWAP_2_BYTES(temp_index
) * y_percent
;
1944 totals
[k
] += *(const GLushort
*)temp_index
* y_percent
;
1949 percent
= y_percent
* highx_float
;
1950 for (k
= 0, temp_index
= temp
; k
< components
;
1951 k
++, temp_index
+= element_size
) {
1953 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
1955 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
1959 /* calculate the value for pixels in the 1st and last column */
1960 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
1963 for (k
= 0; k
< components
;
1964 k
++, left
+= element_size
, right
+= element_size
) {
1967 __GLU_SWAP_2_BYTES(left
) * (1-lowx_float
) +
1968 __GLU_SWAP_2_BYTES(right
) * highx_float
;
1970 totals
[k
] += *(const GLushort
*)left
* (1-lowx_float
)
1971 + *(const GLushort
*)right
* highx_float
;
1975 } else if (highy_int
> lowy_int
) {
1976 x_percent
= highx_float
- lowx_float
;
1977 percent
= (1-lowy_float
)*x_percent
;
1978 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
1979 for (k
= 0, temp_index
= temp
; k
< components
;
1980 k
++, temp_index
+= element_size
) {
1982 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
1984 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
1987 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
1989 for (k
= 0, temp_index
= temp
; k
< components
;
1990 k
++, temp_index
+= element_size
) {
1993 __GLU_SWAP_2_BYTES(temp_index
) * x_percent
;
1995 totals
[k
] += *(const GLushort
*)temp_index
* x_percent
;
1999 percent
= x_percent
* highy_float
;
2001 for (k
= 0, temp_index
= temp
; k
< components
;
2002 k
++, temp_index
+= element_size
) {
2004 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
2006 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
2009 } else if (highx_int
> lowx_int
) {
2010 y_percent
= highy_float
- lowy_float
;
2011 percent
= (1-lowx_float
)*y_percent
;
2012 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
2013 for (k
= 0, temp_index
= temp
; k
< components
;
2014 k
++, temp_index
+= element_size
) {
2016 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
2018 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
2021 for (l
= lowx_int
+1; l
< highx_int
; l
++) {
2023 for (k
= 0, temp_index
= temp
; k
< components
;
2024 k
++, temp_index
+= element_size
) {
2027 __GLU_SWAP_2_BYTES(temp_index
) * y_percent
;
2029 totals
[k
] += *(const GLushort
*)temp_index
* y_percent
;
2034 percent
= y_percent
* highx_float
;
2035 for (k
= 0, temp_index
= temp
; k
< components
;
2036 k
++, temp_index
+= element_size
) {
2038 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
2040 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
2044 percent
= (highy_float
-lowy_float
)*(highx_float
-lowx_float
);
2045 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
2046 for (k
= 0, temp_index
= temp
; k
< components
;
2047 k
++, temp_index
+= element_size
) {
2049 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
2051 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
2056 /* this is for the pixels in the body */
2057 temp0
= (const char *)datain
+ xindex
+ group_size
+
2059 for (m
= lowy_int
+1; m
< highy_int
; m
++) {
2061 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
2062 for (k
= 0, temp_index
= temp
; k
< components
;
2063 k
++, temp_index
+= element_size
) {
2065 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
);
2067 totals
[k
] += *(const GLushort
*)temp_index
;
2075 outindex
= (j
+ (i
* widthout
)) * components
;
2076 for (k
= 0; k
< components
; k
++) {
2077 dataout
[outindex
+ k
] = totals
[k
]/area
;
2078 /*printf("totals[%d] = %f\n", k, totals[k]);*/
2080 lowx_int
= highx_int
;
2081 lowx_float
= highx_float
;
2082 highx_int
+= convx_int
;
2083 highx_float
+= convx_float
;
2084 if(highx_float
> 1) {
2089 lowy_int
= highy_int
;
2090 lowy_float
= highy_float
;
2091 highy_int
+= convy_int
;
2092 highy_float
+= convy_float
;
2093 if(highy_float
> 1) {
2100 static void scale_internal_short(GLint components
, GLint widthin
,
2101 GLint heightin
, const GLshort
*datain
,
2102 GLint widthout
, GLint heightout
,
2103 GLshort
*dataout
, GLint element_size
,
2104 GLint ysize
, GLint group_size
,
2110 /* Max components in a format is 4, so... */
2115 const char *temp
, *temp0
;
2116 const char *temp_index
;
2119 int lowx_int
, highx_int
, lowy_int
, highy_int
;
2120 float x_percent
, y_percent
;
2121 float lowx_float
, highx_float
, lowy_float
, highy_float
;
2122 float convy_float
, convx_float
;
2123 int convy_int
, convx_int
;
2125 const char *left
, *right
;
2127 GLushort swapbuf
; /* unsigned buffer */
2129 if (widthin
== widthout
*2 && heightin
== heightout
*2) {
2130 halveImage_short(components
, widthin
, heightin
,
2131 (const GLshort
*)datain
, (GLshort
*)dataout
,
2132 element_size
, ysize
, group_size
, myswap_bytes
);
2135 convy
= (float) heightin
/heightout
;
2136 convx
= (float) widthin
/widthout
;
2137 convy_int
= floor(convy
);
2138 convy_float
= convy
- convy_int
;
2139 convx_int
= floor(convx
);
2140 convx_float
= convx
- convx_int
;
2142 area
= convx
* convy
;
2146 highy_int
= convy_int
;
2147 highy_float
= convy_float
;
2149 for (i
= 0; i
< heightout
; i
++) {
2150 /* Clamp here to be sure we don't read beyond input buffer. */
2151 if (highy_int
>= heightin
)
2152 highy_int
= heightin
- 1;
2155 highx_int
= convx_int
;
2156 highx_float
= convx_float
;
2158 for (j
= 0; j
< widthout
; j
++) {
2160 ** Ok, now apply box filter to box that goes from (lowx, lowy)
2161 ** to (highx, highy) on input data into this pixel on output
2164 totals
[0] = totals
[1] = totals
[2] = totals
[3] = 0.0;
2166 /* calculate the value for pixels in the 1st row */
2167 xindex
= lowx_int
*group_size
;
2168 if((highy_int
>lowy_int
) && (highx_int
>lowx_int
)) {
2170 y_percent
= 1-lowy_float
;
2171 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
2172 percent
= y_percent
* (1-lowx_float
);
2173 for (k
= 0, temp_index
= temp
; k
< components
;
2174 k
++, temp_index
+= element_size
) {
2176 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2177 totals
[k
] += *(const GLshort
*)&swapbuf
* percent
;
2179 totals
[k
] += *(const GLshort
*)temp_index
* percent
;
2183 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
2185 for (k
= 0, temp_index
= temp
; k
< components
;
2186 k
++, temp_index
+= element_size
) {
2188 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2189 totals
[k
] += *(const GLshort
*)&swapbuf
* y_percent
;
2191 totals
[k
] += *(const GLshort
*)temp_index
* y_percent
;
2197 percent
= y_percent
* highx_float
;
2198 for (k
= 0, temp_index
= temp
; k
< components
;
2199 k
++, temp_index
+= element_size
) {
2201 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2202 totals
[k
] += *(const GLshort
*)&swapbuf
* percent
;
2204 totals
[k
] += *(const GLshort
*)temp_index
* percent
;
2208 /* calculate the value for pixels in the last row */
2209 y_percent
= highy_float
;
2210 percent
= y_percent
* (1-lowx_float
);
2211 temp
= (const char *)datain
+ xindex
+ highy_int
* ysize
;
2212 for (k
= 0, temp_index
= temp
; k
< components
;
2213 k
++, temp_index
+= element_size
) {
2215 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2216 totals
[k
] += *(const GLshort
*)&swapbuf
* percent
;
2218 totals
[k
] += *(const GLshort
*)temp_index
* percent
;
2221 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
2223 for (k
= 0, temp_index
= temp
; k
< components
;
2224 k
++, temp_index
+= element_size
) {
2226 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2227 totals
[k
] += *(const GLshort
*)&swapbuf
* y_percent
;
2229 totals
[k
] += *(const GLshort
*)temp_index
* y_percent
;
2234 percent
= y_percent
* highx_float
;
2235 for (k
= 0, temp_index
= temp
; k
< components
;
2236 k
++, temp_index
+= element_size
) {
2238 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2239 totals
[k
] += *(const GLshort
*)&swapbuf
* percent
;
2241 totals
[k
] += *(const GLshort
*)temp_index
* percent
;
2245 /* calculate the value for pixels in the 1st and last column */
2246 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
2249 for (k
= 0; k
< components
;
2250 k
++, left
+= element_size
, right
+= element_size
) {
2252 swapbuf
= __GLU_SWAP_2_BYTES(left
);
2253 totals
[k
] += *(const GLshort
*)&swapbuf
* (1-lowx_float
);
2254 swapbuf
= __GLU_SWAP_2_BYTES(right
);
2255 totals
[k
] += *(const GLshort
*)&swapbuf
* highx_float
;
2257 totals
[k
] += *(const GLshort
*)left
* (1-lowx_float
)
2258 + *(const GLshort
*)right
* highx_float
;
2262 } else if (highy_int
> lowy_int
) {
2263 x_percent
= highx_float
- lowx_float
;
2264 percent
= (1-lowy_float
)*x_percent
;
2265 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
2266 for (k
= 0, temp_index
= temp
; k
< components
;
2267 k
++, temp_index
+= element_size
) {
2269 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2270 totals
[k
] += *(const GLshort
*)&swapbuf
* percent
;
2272 totals
[k
] += *(const GLshort
*)temp_index
* percent
;
2275 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
2277 for (k
= 0, temp_index
= temp
; k
< components
;
2278 k
++, temp_index
+= element_size
) {
2280 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2281 totals
[k
] += *(const GLshort
*)&swapbuf
* x_percent
;
2283 totals
[k
] += *(const GLshort
*)temp_index
* x_percent
;
2287 percent
= x_percent
* highy_float
;
2289 for (k
= 0, temp_index
= temp
; k
< components
;
2290 k
++, temp_index
+= element_size
) {
2292 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2293 totals
[k
] += *(const GLshort
*)&swapbuf
* percent
;
2295 totals
[k
] += *(const GLshort
*)temp_index
* percent
;
2298 } else if (highx_int
> lowx_int
) {
2299 y_percent
= highy_float
- lowy_float
;
2300 percent
= (1-lowx_float
)*y_percent
;
2302 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
2303 for (k
= 0, temp_index
= temp
; k
< components
;
2304 k
++, temp_index
+= element_size
) {
2306 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2307 totals
[k
] += *(const GLshort
*)&swapbuf
* percent
;
2309 totals
[k
] += *(const GLshort
*)temp_index
* percent
;
2312 for (l
= lowx_int
+1; l
< highx_int
; l
++) {
2314 for (k
= 0, temp_index
= temp
; k
< components
;
2315 k
++, temp_index
+= element_size
) {
2317 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2318 totals
[k
] += *(const GLshort
*)&swapbuf
* y_percent
;
2320 totals
[k
] += *(const GLshort
*)temp_index
* y_percent
;
2325 percent
= y_percent
* highx_float
;
2326 for (k
= 0, temp_index
= temp
; k
< components
;
2327 k
++, temp_index
+= element_size
) {
2329 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2330 totals
[k
] += *(const GLshort
*)&swapbuf
* percent
;
2332 totals
[k
] += *(const GLshort
*)temp_index
* percent
;
2336 percent
= (highy_float
-lowy_float
)*(highx_float
-lowx_float
);
2337 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
2338 for (k
= 0, temp_index
= temp
; k
< components
;
2339 k
++, temp_index
+= element_size
) {
2341 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2342 totals
[k
] += *(const GLshort
*)&swapbuf
* percent
;
2344 totals
[k
] += *(const GLshort
*)temp_index
* percent
;
2349 /* this is for the pixels in the body */
2350 temp0
= (const char *)datain
+ xindex
+ group_size
+
2352 for (m
= lowy_int
+1; m
< highy_int
; m
++) {
2354 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
2355 for (k
= 0, temp_index
= temp
; k
< components
;
2356 k
++, temp_index
+= element_size
) {
2358 swapbuf
= __GLU_SWAP_2_BYTES(temp_index
);
2359 totals
[k
] += *(const GLshort
*)&swapbuf
;
2361 totals
[k
] += *(const GLshort
*)temp_index
;
2369 outindex
= (j
+ (i
* widthout
)) * components
;
2370 for (k
= 0; k
< components
; k
++) {
2371 dataout
[outindex
+ k
] = totals
[k
]/area
;
2372 /*printf("totals[%d] = %f\n", k, totals[k]);*/
2374 lowx_int
= highx_int
;
2375 lowx_float
= highx_float
;
2376 highx_int
+= convx_int
;
2377 highx_float
+= convx_float
;
2378 if(highx_float
> 1) {
2383 lowy_int
= highy_int
;
2384 lowy_float
= highy_float
;
2385 highy_int
+= convy_int
;
2386 highy_float
+= convy_float
;
2387 if(highy_float
> 1) {
2394 static void scale_internal_uint(GLint components
, GLint widthin
,
2395 GLint heightin
, const GLuint
*datain
,
2396 GLint widthout
, GLint heightout
,
2397 GLuint
*dataout
, GLint element_size
,
2398 GLint ysize
, GLint group_size
,
2404 /* Max components in a format is 4, so... */
2409 const char *temp
, *temp0
;
2410 const char *temp_index
;
2413 int lowx_int
, highx_int
, lowy_int
, highy_int
;
2414 float x_percent
, y_percent
;
2415 float lowx_float
, highx_float
, lowy_float
, highy_float
;
2416 float convy_float
, convx_float
;
2417 int convy_int
, convx_int
;
2419 const char *left
, *right
;
2421 if (widthin
== widthout
*2 && heightin
== heightout
*2) {
2422 halveImage_uint(components
, widthin
, heightin
,
2423 (const GLuint
*)datain
, (GLuint
*)dataout
,
2424 element_size
, ysize
, group_size
, myswap_bytes
);
2427 convy
= (float) heightin
/heightout
;
2428 convx
= (float) widthin
/widthout
;
2429 convy_int
= floor(convy
);
2430 convy_float
= convy
- convy_int
;
2431 convx_int
= floor(convx
);
2432 convx_float
= convx
- convx_int
;
2434 area
= convx
* convy
;
2438 highy_int
= convy_int
;
2439 highy_float
= convy_float
;
2441 for (i
= 0; i
< heightout
; i
++) {
2442 /* Clamp here to be sure we don't read beyond input buffer. */
2443 if (highy_int
>= heightin
)
2444 highy_int
= heightin
- 1;
2447 highx_int
= convx_int
;
2448 highx_float
= convx_float
;
2450 for (j
= 0; j
< widthout
; j
++) {
2452 ** Ok, now apply box filter to box that goes from (lowx, lowy)
2453 ** to (highx, highy) on input data into this pixel on output
2456 totals
[0] = totals
[1] = totals
[2] = totals
[3] = 0.0;
2458 /* calculate the value for pixels in the 1st row */
2459 xindex
= lowx_int
*group_size
;
2460 if((highy_int
>lowy_int
) && (highx_int
>lowx_int
)) {
2462 y_percent
= 1-lowy_float
;
2463 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
2464 percent
= y_percent
* (1-lowx_float
);
2465 for (k
= 0, temp_index
= temp
; k
< components
;
2466 k
++, temp_index
+= element_size
) {
2468 totals
[k
] += __GLU_SWAP_4_BYTES(temp_index
) * percent
;
2470 totals
[k
] += *(const GLuint
*)temp_index
* percent
;
2474 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
2476 for (k
= 0, temp_index
= temp
; k
< components
;
2477 k
++, temp_index
+= element_size
) {
2480 __GLU_SWAP_4_BYTES(temp_index
) * y_percent
;
2482 totals
[k
] += *(const GLuint
*)temp_index
* y_percent
;
2488 percent
= y_percent
* highx_float
;
2489 for (k
= 0, temp_index
= temp
; k
< components
;
2490 k
++, temp_index
+= element_size
) {
2492 totals
[k
] += __GLU_SWAP_4_BYTES(temp_index
) * percent
;
2494 totals
[k
] += *(const GLuint
*)temp_index
* percent
;
2498 /* calculate the value for pixels in the last row */
2499 y_percent
= highy_float
;
2500 percent
= y_percent
* (1-lowx_float
);
2501 temp
= (const char *)datain
+ xindex
+ highy_int
* ysize
;
2502 for (k
= 0, temp_index
= temp
; k
< components
;
2503 k
++, temp_index
+= element_size
) {
2505 totals
[k
] += __GLU_SWAP_4_BYTES(temp_index
) * percent
;
2507 totals
[k
] += *(const GLuint
*)temp_index
* percent
;
2510 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
2512 for (k
= 0, temp_index
= temp
; k
< components
;
2513 k
++, temp_index
+= element_size
) {
2516 __GLU_SWAP_4_BYTES(temp_index
) * y_percent
;
2518 totals
[k
] += *(const GLuint
*)temp_index
* y_percent
;
2523 percent
= y_percent
* highx_float
;
2524 for (k
= 0, temp_index
= temp
; k
< components
;
2525 k
++, temp_index
+= element_size
) {
2527 totals
[k
] += __GLU_SWAP_4_BYTES(temp_index
) * percent
;
2529 totals
[k
] += *(const GLuint
*)temp_index
* percent
;
2533 /* calculate the value for pixels in the 1st and last column */
2534 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
2537 for (k
= 0; k
< components
;
2538 k
++, left
+= element_size
, right
+= element_size
) {
2541 __GLU_SWAP_4_BYTES(left
) * (1-lowx_float
)
2542 + __GLU_SWAP_4_BYTES(right
) * highx_float
;
2544 totals
[k
] += *(const GLuint
*)left
* (1-lowx_float
)
2545 + *(const GLuint
*)right
* highx_float
;
2549 } else if (highy_int
> lowy_int
) {
2550 x_percent
= highx_float
- lowx_float
;
2551 percent
= (1-lowy_float
)*x_percent
;
2552 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
2553 for (k
= 0, temp_index
= temp
; k
< components
;
2554 k
++, temp_index
+= element_size
) {
2556 totals
[k
] += __GLU_SWAP_4_BYTES(temp_index
) * percent
;
2558 totals
[k
] += *(const GLuint
*)temp_index
* percent
;
2561 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
2563 for (k
= 0, temp_index
= temp
; k
< components
;
2564 k
++, temp_index
+= element_size
) {
2567 __GLU_SWAP_4_BYTES(temp_index
) * x_percent
;
2569 totals
[k
] += *(const GLuint
*)temp_index
* x_percent
;
2573 percent
= x_percent
* highy_float
;
2575 for (k
= 0, temp_index
= temp
; k
< components
;
2576 k
++, temp_index
+= element_size
) {
2578 totals
[k
] += __GLU_SWAP_4_BYTES(temp_index
) * percent
;
2580 totals
[k
] += *(const GLuint
*)temp_index
* percent
;
2583 } else if (highx_int
> lowx_int
) {
2584 y_percent
= highy_float
- lowy_float
;
2585 percent
= (1-lowx_float
)*y_percent
;
2587 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
2588 for (k
= 0, temp_index
= temp
; k
< components
;
2589 k
++, temp_index
+= element_size
) {
2591 totals
[k
] += __GLU_SWAP_4_BYTES(temp_index
) * percent
;
2593 totals
[k
] += *(const GLuint
*)temp_index
* percent
;
2596 for (l
= lowx_int
+1; l
< highx_int
; l
++) {
2598 for (k
= 0, temp_index
= temp
; k
< components
;
2599 k
++, temp_index
+= element_size
) {
2602 __GLU_SWAP_4_BYTES(temp_index
) * y_percent
;
2604 totals
[k
] += *(const GLuint
*)temp_index
* y_percent
;
2609 percent
= y_percent
* highx_float
;
2610 for (k
= 0, temp_index
= temp
; k
< components
;
2611 k
++, temp_index
+= element_size
) {
2613 totals
[k
] += __GLU_SWAP_4_BYTES(temp_index
) * percent
;
2615 totals
[k
] += *(const GLuint
*)temp_index
* percent
;
2619 percent
= (highy_float
-lowy_float
)*(highx_float
-lowx_float
);
2620 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
2621 for (k
= 0, temp_index
= temp
; k
< components
;
2622 k
++, temp_index
+= element_size
) {
2624 totals
[k
] += __GLU_SWAP_4_BYTES(temp_index
) * percent
;
2626 totals
[k
] += *(const GLuint
*)temp_index
* percent
;
2631 /* this is for the pixels in the body */
2632 temp0
= (const char *)datain
+ xindex
+ group_size
+
2634 for (m
= lowy_int
+1; m
< highy_int
; m
++) {
2636 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
2637 for (k
= 0, temp_index
= temp
; k
< components
;
2638 k
++, temp_index
+= element_size
) {
2640 totals
[k
] += __GLU_SWAP_4_BYTES(temp_index
);
2642 totals
[k
] += *(const GLuint
*)temp_index
;
2650 outindex
= (j
+ (i
* widthout
)) * components
;
2651 for (k
= 0; k
< components
; k
++) {
2652 /* clamp at UINT_MAX */
2653 float value
= totals
[k
]/area
;
2654 if (value
>= (float) UINT_MAX
) { /* need '=' */
2655 dataout
[outindex
+ k
] = UINT_MAX
;
2657 else dataout
[outindex
+ k
] = value
;
2659 lowx_int
= highx_int
;
2660 lowx_float
= highx_float
;
2661 highx_int
+= convx_int
;
2662 highx_float
+= convx_float
;
2663 if(highx_float
> 1) {
2668 lowy_int
= highy_int
;
2669 lowy_float
= highy_float
;
2670 highy_int
+= convy_int
;
2671 highy_float
+= convy_float
;
2672 if(highy_float
> 1) {
2681 static void scale_internal_int(GLint components
, GLint widthin
,
2682 GLint heightin
, const GLint
*datain
,
2683 GLint widthout
, GLint heightout
,
2684 GLint
*dataout
, GLint element_size
,
2685 GLint ysize
, GLint group_size
,
2691 /* Max components in a format is 4, so... */
2696 const char *temp
, *temp0
;
2697 const char *temp_index
;
2700 int lowx_int
, highx_int
, lowy_int
, highy_int
;
2701 float x_percent
, y_percent
;
2702 float lowx_float
, highx_float
, lowy_float
, highy_float
;
2703 float convy_float
, convx_float
;
2704 int convy_int
, convx_int
;
2706 const char *left
, *right
;
2708 GLuint swapbuf
; /* unsigned buffer */
2710 if (widthin
== widthout
*2 && heightin
== heightout
*2) {
2711 halveImage_int(components
, widthin
, heightin
,
2712 (const GLint
*)datain
, (GLint
*)dataout
,
2713 element_size
, ysize
, group_size
, myswap_bytes
);
2716 convy
= (float) heightin
/heightout
;
2717 convx
= (float) widthin
/widthout
;
2718 convy_int
= floor(convy
);
2719 convy_float
= convy
- convy_int
;
2720 convx_int
= floor(convx
);
2721 convx_float
= convx
- convx_int
;
2723 area
= convx
* convy
;
2727 highy_int
= convy_int
;
2728 highy_float
= convy_float
;
2730 for (i
= 0; i
< heightout
; i
++) {
2731 /* Clamp here to be sure we don't read beyond input buffer. */
2732 if (highy_int
>= heightin
)
2733 highy_int
= heightin
- 1;
2736 highx_int
= convx_int
;
2737 highx_float
= convx_float
;
2739 for (j
= 0; j
< widthout
; j
++) {
2741 ** Ok, now apply box filter to box that goes from (lowx, lowy)
2742 ** to (highx, highy) on input data into this pixel on output
2745 totals
[0] = totals
[1] = totals
[2] = totals
[3] = 0.0;
2747 /* calculate the value for pixels in the 1st row */
2748 xindex
= lowx_int
*group_size
;
2749 if((highy_int
>lowy_int
) && (highx_int
>lowx_int
)) {
2751 y_percent
= 1-lowy_float
;
2752 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
2753 percent
= y_percent
* (1-lowx_float
);
2754 for (k
= 0, temp_index
= temp
; k
< components
;
2755 k
++, temp_index
+= element_size
) {
2757 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2758 totals
[k
] += *(const GLint
*)&swapbuf
* percent
;
2760 totals
[k
] += *(const GLint
*)temp_index
* percent
;
2764 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
2766 for (k
= 0, temp_index
= temp
; k
< components
;
2767 k
++, temp_index
+= element_size
) {
2769 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2770 totals
[k
] += *(const GLint
*)&swapbuf
* y_percent
;
2772 totals
[k
] += *(const GLint
*)temp_index
* y_percent
;
2778 percent
= y_percent
* highx_float
;
2779 for (k
= 0, temp_index
= temp
; k
< components
;
2780 k
++, temp_index
+= element_size
) {
2782 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2783 totals
[k
] += *(const GLint
*)&swapbuf
* percent
;
2785 totals
[k
] += *(const GLint
*)temp_index
* percent
;
2789 /* calculate the value for pixels in the last row */
2790 y_percent
= highy_float
;
2791 percent
= y_percent
* (1-lowx_float
);
2792 temp
= (const char *)datain
+ xindex
+ highy_int
* ysize
;
2793 for (k
= 0, temp_index
= temp
; k
< components
;
2794 k
++, temp_index
+= element_size
) {
2796 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2797 totals
[k
] += *(const GLint
*)&swapbuf
* percent
;
2799 totals
[k
] += *(const GLint
*)temp_index
* percent
;
2802 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
2804 for (k
= 0, temp_index
= temp
; k
< components
;
2805 k
++, temp_index
+= element_size
) {
2807 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2808 totals
[k
] += *(const GLint
*)&swapbuf
* y_percent
;
2810 totals
[k
] += *(const GLint
*)temp_index
* y_percent
;
2815 percent
= y_percent
* highx_float
;
2816 for (k
= 0, temp_index
= temp
; k
< components
;
2817 k
++, temp_index
+= element_size
) {
2819 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2820 totals
[k
] += *(const GLint
*)&swapbuf
* percent
;
2822 totals
[k
] += *(const GLint
*)temp_index
* percent
;
2826 /* calculate the value for pixels in the 1st and last column */
2827 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
2830 for (k
= 0; k
< components
;
2831 k
++, left
+= element_size
, right
+= element_size
) {
2833 swapbuf
= __GLU_SWAP_4_BYTES(left
);
2834 totals
[k
] += *(const GLint
*)&swapbuf
* (1-lowx_float
);
2835 swapbuf
= __GLU_SWAP_4_BYTES(right
);
2836 totals
[k
] += *(const GLint
*)&swapbuf
* highx_float
;
2838 totals
[k
] += *(const GLint
*)left
* (1-lowx_float
)
2839 + *(const GLint
*)right
* highx_float
;
2843 } else if (highy_int
> lowy_int
) {
2844 x_percent
= highx_float
- lowx_float
;
2845 percent
= (1-lowy_float
)*x_percent
;
2846 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
2847 for (k
= 0, temp_index
= temp
; k
< components
;
2848 k
++, temp_index
+= element_size
) {
2850 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2851 totals
[k
] += *(const GLint
*)&swapbuf
* percent
;
2853 totals
[k
] += *(const GLint
*)temp_index
* percent
;
2856 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
2858 for (k
= 0, temp_index
= temp
; k
< components
;
2859 k
++, temp_index
+= element_size
) {
2861 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2862 totals
[k
] += *(const GLint
*)&swapbuf
* x_percent
;
2864 totals
[k
] += *(const GLint
*)temp_index
* x_percent
;
2868 percent
= x_percent
* highy_float
;
2870 for (k
= 0, temp_index
= temp
; k
< components
;
2871 k
++, temp_index
+= element_size
) {
2873 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2874 totals
[k
] += *(const GLint
*)&swapbuf
* percent
;
2876 totals
[k
] += *(const GLint
*)temp_index
* percent
;
2879 } else if (highx_int
> lowx_int
) {
2880 y_percent
= highy_float
- lowy_float
;
2881 percent
= (1-lowx_float
)*y_percent
;
2883 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
2884 for (k
= 0, temp_index
= temp
; k
< components
;
2885 k
++, temp_index
+= element_size
) {
2887 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2888 totals
[k
] += *(const GLint
*)&swapbuf
* percent
;
2890 totals
[k
] += *(const GLint
*)temp_index
* percent
;
2893 for (l
= lowx_int
+1; l
< highx_int
; l
++) {
2895 for (k
= 0, temp_index
= temp
; k
< components
;
2896 k
++, temp_index
+= element_size
) {
2898 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2899 totals
[k
] += *(const GLint
*)&swapbuf
* y_percent
;
2901 totals
[k
] += *(const GLint
*)temp_index
* y_percent
;
2906 percent
= y_percent
* highx_float
;
2907 for (k
= 0, temp_index
= temp
; k
< components
;
2908 k
++, temp_index
+= element_size
) {
2910 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2911 totals
[k
] += *(const GLint
*)&swapbuf
* percent
;
2913 totals
[k
] += *(const GLint
*)temp_index
* percent
;
2917 percent
= (highy_float
-lowy_float
)*(highx_float
-lowx_float
);
2918 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
2919 for (k
= 0, temp_index
= temp
; k
< components
;
2920 k
++, temp_index
+= element_size
) {
2922 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2923 totals
[k
] += *(const GLint
*)&swapbuf
* percent
;
2925 totals
[k
] += *(const GLint
*)temp_index
* percent
;
2930 /* this is for the pixels in the body */
2931 temp0
= (const char *)datain
+ xindex
+ group_size
+
2933 for (m
= lowy_int
+1; m
< highy_int
; m
++) {
2935 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
2936 for (k
= 0, temp_index
= temp
; k
< components
;
2937 k
++, temp_index
+= element_size
) {
2939 swapbuf
= __GLU_SWAP_4_BYTES(temp_index
);
2940 totals
[k
] += *(const GLint
*)&swapbuf
;
2942 totals
[k
] += *(const GLint
*)temp_index
;
2950 outindex
= (j
+ (i
* widthout
)) * components
;
2951 for (k
= 0; k
< components
; k
++) {
2952 dataout
[outindex
+ k
] = totals
[k
]/area
;
2953 /*printf("totals[%d] = %f\n", k, totals[k]);*/
2955 lowx_int
= highx_int
;
2956 lowx_float
= highx_float
;
2957 highx_int
+= convx_int
;
2958 highx_float
+= convx_float
;
2959 if(highx_float
> 1) {
2964 lowy_int
= highy_int
;
2965 lowy_float
= highy_float
;
2966 highy_int
+= convy_int
;
2967 highy_float
+= convy_float
;
2968 if(highy_float
> 1) {
2977 static void scale_internal_float(GLint components
, GLint widthin
,
2978 GLint heightin
, const GLfloat
*datain
,
2979 GLint widthout
, GLint heightout
,
2980 GLfloat
*dataout
, GLint element_size
,
2981 GLint ysize
, GLint group_size
,
2987 /* Max components in a format is 4, so... */
2992 const char *temp
, *temp0
;
2993 const char *temp_index
;
2996 int lowx_int
, highx_int
, lowy_int
, highy_int
;
2997 float x_percent
, y_percent
;
2998 float lowx_float
, highx_float
, lowy_float
, highy_float
;
2999 float convy_float
, convx_float
;
3000 int convy_int
, convx_int
;
3002 const char *left
, *right
;
3004 union { GLuint b
; GLfloat f
; } swapbuf
;
3006 if (widthin
== widthout
*2 && heightin
== heightout
*2) {
3007 halveImage_float(components
, widthin
, heightin
,
3008 (const GLfloat
*)datain
, (GLfloat
*)dataout
,
3009 element_size
, ysize
, group_size
, myswap_bytes
);
3012 convy
= (float) heightin
/heightout
;
3013 convx
= (float) widthin
/widthout
;
3014 convy_int
= floor(convy
);
3015 convy_float
= convy
- convy_int
;
3016 convx_int
= floor(convx
);
3017 convx_float
= convx
- convx_int
;
3019 area
= convx
* convy
;
3023 highy_int
= convy_int
;
3024 highy_float
= convy_float
;
3026 for (i
= 0; i
< heightout
; i
++) {
3027 /* Clamp here to be sure we don't read beyond input buffer. */
3028 if (highy_int
>= heightin
)
3029 highy_int
= heightin
- 1;
3032 highx_int
= convx_int
;
3033 highx_float
= convx_float
;
3035 for (j
= 0; j
< widthout
; j
++) {
3037 ** Ok, now apply box filter to box that goes from (lowx, lowy)
3038 ** to (highx, highy) on input data into this pixel on output
3041 totals
[0] = totals
[1] = totals
[2] = totals
[3] = 0.0;
3043 /* calculate the value for pixels in the 1st row */
3044 xindex
= lowx_int
*group_size
;
3045 if((highy_int
>lowy_int
) && (highx_int
>lowx_int
)) {
3047 y_percent
= 1-lowy_float
;
3048 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
3049 percent
= y_percent
* (1-lowx_float
);
3050 for (k
= 0, temp_index
= temp
; k
< components
;
3051 k
++, temp_index
+= element_size
) {
3053 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3054 totals
[k
] += swapbuf
.f
* percent
;
3056 totals
[k
] += *(const GLfloat
*)temp_index
* percent
;
3060 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
3062 for (k
= 0, temp_index
= temp
; k
< components
;
3063 k
++, temp_index
+= element_size
) {
3065 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3066 totals
[k
] += swapbuf
.f
* y_percent
;
3068 totals
[k
] += *(const GLfloat
*)temp_index
* y_percent
;
3074 percent
= y_percent
* highx_float
;
3075 for (k
= 0, temp_index
= temp
; k
< components
;
3076 k
++, temp_index
+= element_size
) {
3078 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3079 totals
[k
] += swapbuf
.f
* percent
;
3081 totals
[k
] += *(const GLfloat
*)temp_index
* percent
;
3085 /* calculate the value for pixels in the last row */
3086 y_percent
= highy_float
;
3087 percent
= y_percent
* (1-lowx_float
);
3088 temp
= (const char *)datain
+ xindex
+ highy_int
* ysize
;
3089 for (k
= 0, temp_index
= temp
; k
< components
;
3090 k
++, temp_index
+= element_size
) {
3092 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3093 totals
[k
] += swapbuf
.f
* percent
;
3095 totals
[k
] += *(const GLfloat
*)temp_index
* percent
;
3098 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
3100 for (k
= 0, temp_index
= temp
; k
< components
;
3101 k
++, temp_index
+= element_size
) {
3103 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3104 totals
[k
] += swapbuf
.f
* y_percent
;
3106 totals
[k
] += *(const GLfloat
*)temp_index
* y_percent
;
3111 percent
= y_percent
* highx_float
;
3112 for (k
= 0, temp_index
= temp
; k
< components
;
3113 k
++, temp_index
+= element_size
) {
3115 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3116 totals
[k
] += swapbuf
.f
* percent
;
3118 totals
[k
] += *(const GLfloat
*)temp_index
* percent
;
3122 /* calculate the value for pixels in the 1st and last column */
3123 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
3126 for (k
= 0; k
< components
;
3127 k
++, left
+= element_size
, right
+= element_size
) {
3129 swapbuf
.b
= __GLU_SWAP_4_BYTES(left
);
3130 totals
[k
] += swapbuf
.f
* (1-lowx_float
);
3131 swapbuf
.b
= __GLU_SWAP_4_BYTES(right
);
3132 totals
[k
] += swapbuf
.f
* highx_float
;
3134 totals
[k
] += *(const GLfloat
*)left
* (1-lowx_float
)
3135 + *(const GLfloat
*)right
* highx_float
;
3139 } else if (highy_int
> lowy_int
) {
3140 x_percent
= highx_float
- lowx_float
;
3141 percent
= (1-lowy_float
)*x_percent
;
3142 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
3143 for (k
= 0, temp_index
= temp
; k
< components
;
3144 k
++, temp_index
+= element_size
) {
3146 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3147 totals
[k
] += swapbuf
.f
* percent
;
3149 totals
[k
] += *(const GLfloat
*)temp_index
* percent
;
3152 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
3154 for (k
= 0, temp_index
= temp
; k
< components
;
3155 k
++, temp_index
+= element_size
) {
3157 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3158 totals
[k
] += swapbuf
.f
* x_percent
;
3160 totals
[k
] += *(const GLfloat
*)temp_index
* x_percent
;
3164 percent
= x_percent
* highy_float
;
3166 for (k
= 0, temp_index
= temp
; k
< components
;
3167 k
++, temp_index
+= element_size
) {
3169 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3170 totals
[k
] += swapbuf
.f
* percent
;
3172 totals
[k
] += *(const GLfloat
*)temp_index
* percent
;
3175 } else if (highx_int
> lowx_int
) {
3176 y_percent
= highy_float
- lowy_float
;
3177 percent
= (1-lowx_float
)*y_percent
;
3179 temp
= (const char *)datain
+ xindex
+ lowy_int
*ysize
;
3180 for (k
= 0, temp_index
= temp
; k
< components
;
3181 k
++, temp_index
+= element_size
) {
3183 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3184 totals
[k
] += swapbuf
.f
* percent
;
3186 totals
[k
] += *(const GLfloat
*)temp_index
* percent
;
3189 for (l
= lowx_int
+1; l
< highx_int
; l
++) {
3191 for (k
= 0, temp_index
= temp
; k
< components
;
3192 k
++, temp_index
+= element_size
) {
3194 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3195 totals
[k
] += swapbuf
.f
* y_percent
;
3197 totals
[k
] += *(const GLfloat
*)temp_index
* y_percent
;
3202 percent
= y_percent
* highx_float
;
3203 for (k
= 0, temp_index
= temp
; k
< components
;
3204 k
++, temp_index
+= element_size
) {
3206 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3207 totals
[k
] += swapbuf
.f
* percent
;
3209 totals
[k
] += *(const GLfloat
*)temp_index
* percent
;
3213 percent
= (highy_float
-lowy_float
)*(highx_float
-lowx_float
);
3214 temp
= (const char *)datain
+ xindex
+ lowy_int
* ysize
;
3215 for (k
= 0, temp_index
= temp
; k
< components
;
3216 k
++, temp_index
+= element_size
) {
3218 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3219 totals
[k
] += swapbuf
.f
* percent
;
3221 totals
[k
] += *(const GLfloat
*)temp_index
* percent
;
3226 /* this is for the pixels in the body */
3227 temp0
= (const char *)datain
+ xindex
+ group_size
+
3229 for (m
= lowy_int
+1; m
< highy_int
; m
++) {
3231 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
3232 for (k
= 0, temp_index
= temp
; k
< components
;
3233 k
++, temp_index
+= element_size
) {
3235 swapbuf
.b
= __GLU_SWAP_4_BYTES(temp_index
);
3236 totals
[k
] += swapbuf
.f
;
3238 totals
[k
] += *(const GLfloat
*)temp_index
;
3246 outindex
= (j
+ (i
* widthout
)) * components
;
3247 for (k
= 0; k
< components
; k
++) {
3248 dataout
[outindex
+ k
] = totals
[k
]/area
;
3249 /*printf("totals[%d] = %f\n", k, totals[k]);*/
3251 lowx_int
= highx_int
;
3252 lowx_float
= highx_float
;
3253 highx_int
+= convx_int
;
3254 highx_float
+= convx_float
;
3255 if(highx_float
> 1) {
3260 lowy_int
= highy_int
;
3261 lowy_float
= highy_float
;
3262 highy_int
+= convy_int
;
3263 highy_float
+= convy_float
;
3264 if(highy_float
> 1) {
3271 static int checkMipmapArgs(GLenum internalFormat
, GLenum format
, GLenum type
)
3273 if (!legalFormat(format
) || !legalType(type
)) {
3274 return GLU_INVALID_ENUM
;
3276 if (format
== GL_STENCIL_INDEX
) {
3277 return GLU_INVALID_ENUM
;
3280 if (!isLegalFormatForPackedPixelType(format
, type
)) {
3281 return GLU_INVALID_OPERATION
;
3285 } /* checkMipmapArgs() */
3287 static GLboolean
legalFormat(GLenum format
)
3290 case GL_COLOR_INDEX
:
3291 case GL_STENCIL_INDEX
:
3292 case GL_DEPTH_COMPONENT
:
3300 case GL_LUMINANCE_ALPHA
:
3310 static GLboolean
legalType(GLenum type
)
3315 case GL_UNSIGNED_BYTE
:
3317 case GL_UNSIGNED_SHORT
:
3319 case GL_UNSIGNED_INT
:
3321 case GL_UNSIGNED_BYTE_3_3_2
:
3322 case GL_UNSIGNED_BYTE_2_3_3_REV
:
3323 case GL_UNSIGNED_SHORT_5_6_5
:
3324 case GL_UNSIGNED_SHORT_5_6_5_REV
:
3325 case GL_UNSIGNED_SHORT_4_4_4_4
:
3326 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
3327 case GL_UNSIGNED_SHORT_5_5_5_1
:
3328 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
3329 case GL_UNSIGNED_INT_8_8_8_8
:
3330 case GL_UNSIGNED_INT_8_8_8_8_REV
:
3331 case GL_UNSIGNED_INT_10_10_10_2
:
3332 case GL_UNSIGNED_INT_2_10_10_10_REV
:
3340 static GLboolean
isTypePackedPixel(GLenum type
)
3342 assert(legalType(type
));
3344 if (type
== GL_UNSIGNED_BYTE_3_3_2
||
3345 type
== GL_UNSIGNED_BYTE_2_3_3_REV
||
3346 type
== GL_UNSIGNED_SHORT_5_6_5
||
3347 type
== GL_UNSIGNED_SHORT_5_6_5_REV
||
3348 type
== GL_UNSIGNED_SHORT_4_4_4_4
||
3349 type
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
3350 type
== GL_UNSIGNED_SHORT_5_5_5_1
||
3351 type
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
3352 type
== GL_UNSIGNED_INT_8_8_8_8
||
3353 type
== GL_UNSIGNED_INT_8_8_8_8_REV
||
3354 type
== GL_UNSIGNED_INT_10_10_10_2
||
3355 type
== GL_UNSIGNED_INT_2_10_10_10_REV
) {
3359 } /* isTypePackedPixel() */
3361 /* Determines if the packed pixel type is compatible with the format */
3362 static GLboolean
isLegalFormatForPackedPixelType(GLenum format
, GLenum type
)
3364 /* if not a packed pixel type then return true */
3365 if (!isTypePackedPixel(type
)) {
3369 /* 3_3_2/2_3_3_REV & 5_6_5/5_6_5_REV are only compatible with RGB */
3370 if ((type
== GL_UNSIGNED_BYTE_3_3_2
|| type
== GL_UNSIGNED_BYTE_2_3_3_REV
||
3371 type
== GL_UNSIGNED_SHORT_5_6_5
|| type
== GL_UNSIGNED_SHORT_5_6_5_REV
)
3372 && format
!= GL_RGB
)
3375 /* 4_4_4_4/4_4_4_4_REV & 5_5_5_1/1_5_5_5_REV & 8_8_8_8/8_8_8_8_REV &
3376 * 10_10_10_2/2_10_10_10_REV are only compatible with RGBA, BGRA & ABGR_EXT.
3378 if ((type
== GL_UNSIGNED_SHORT_4_4_4_4
||
3379 type
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
3380 type
== GL_UNSIGNED_SHORT_5_5_5_1
||
3381 type
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
3382 type
== GL_UNSIGNED_INT_8_8_8_8
||
3383 type
== GL_UNSIGNED_INT_8_8_8_8_REV
||
3384 type
== GL_UNSIGNED_INT_10_10_10_2
||
3385 type
== GL_UNSIGNED_INT_2_10_10_10_REV
) &&
3386 (format
!= GL_RGBA
&&
3387 format
!= GL_BGRA
)) {
3392 } /* isLegalFormatForPackedPixelType() */
3394 static GLboolean
isLegalLevels(GLint userLevel
,GLint baseLevel
,GLint maxLevel
,
3397 if (baseLevel
< 0 || baseLevel
< userLevel
|| maxLevel
< baseLevel
||
3398 totalLevels
< maxLevel
)
3400 else return GL_TRUE
;
3401 } /* isLegalLevels() */
3403 /* Given user requested texture size, determine if it fits. If it
3404 * doesn't then halve both sides and make the determination again
3405 * until it does fit (for IR only).
3406 * Note that proxy textures are not implemented in RE* even though
3407 * they advertise the texture extension.
3408 * Note that proxy textures are implemented but not according to spec in
3411 static void closestFit(GLenum target
, GLint width
, GLint height
,
3412 GLint internalFormat
, GLenum format
, GLenum type
,
3413 GLint
*newWidth
, GLint
*newHeight
)
3415 /* Use proxy textures if OpenGL version is >= 1.1 */
3416 if ( (strtod((const char *)glGetString(GL_VERSION
),NULL
) >= 1.1)
3418 GLint widthPowerOf2
= nearestPower(width
);
3419 GLint heightPowerOf2
= nearestPower(height
);
3423 /* compute level 1 width & height, clamping each at 1 */
3424 GLint widthAtLevelOne
= (widthPowerOf2
> 1) ?
3425 widthPowerOf2
>> 1 :
3427 GLint heightAtLevelOne
= (heightPowerOf2
> 1) ?
3428 heightPowerOf2
>> 1 :
3431 assert(widthAtLevelOne
> 0); assert(heightAtLevelOne
> 0);
3433 /* does width x height at level 1 & all their mipmaps fit? */
3434 if (target
== GL_TEXTURE_2D
|| target
== GL_PROXY_TEXTURE_2D
) {
3435 proxyTarget
= GL_PROXY_TEXTURE_2D
;
3436 glTexImage2D(proxyTarget
, 1, /* must be non-zero */
3438 widthAtLevelOne
,heightAtLevelOne
,0,format
,type
,NULL
);
3440 #if defined(GL_ARB_texture_cube_map)
3441 if ((target
== GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB
) ||
3442 (target
== GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB
) ||
3443 (target
== GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB
) ||
3444 (target
== GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB
) ||
3445 (target
== GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB
) ||
3446 (target
== GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
)) {
3447 proxyTarget
= GL_PROXY_TEXTURE_CUBE_MAP_ARB
;
3448 glTexImage2D(proxyTarget
, 1, /* must be non-zero */
3450 widthAtLevelOne
,heightAtLevelOne
,0,format
,type
,NULL
);
3452 #endif /* GL_ARB_texture_cube_map */
3454 assert(target
== GL_TEXTURE_1D
|| target
== GL_PROXY_TEXTURE_1D
);
3455 proxyTarget
= GL_PROXY_TEXTURE_1D
;
3456 glTexImage1D(proxyTarget
, 1, /* must be non-zero */
3457 internalFormat
,widthAtLevelOne
,0,format
,type
,NULL
);
3459 glGetTexLevelParameteriv(proxyTarget
, 1,GL_TEXTURE_WIDTH
,&proxyWidth
);
3460 /* does it fit??? */
3461 if (proxyWidth
== 0) { /* nope, so try again with these sizes */
3462 if (widthPowerOf2
== 1 && heightPowerOf2
== 1) {
3463 /* An 1x1 texture couldn't fit for some reason, so
3464 * break out. This should never happen. But things
3465 * happen. The disadvantage with this if-statement is
3466 * that we will never be aware of when this happens
3467 * since it will silently branch out.
3469 goto noProxyTextures
;
3471 widthPowerOf2
= widthAtLevelOne
;
3472 heightPowerOf2
= heightAtLevelOne
;
3474 /* else it does fit */
3475 } while (proxyWidth
== 0);
3476 /* loop must terminate! */
3478 /* return the width & height at level 0 that fits */
3479 *newWidth
= widthPowerOf2
;
3480 *newHeight
= heightPowerOf2
;
3481 /*printf("Proxy Textures\n");*/
3482 } /* if gluCheckExtension() */
3483 else { /* no texture extension, so do this instead */
3488 glGetIntegerv(GL_MAX_TEXTURE_SIZE
, &maxsize
);
3489 /* clamp user's texture sizes to maximum sizes, if necessary */
3490 *newWidth
= nearestPower(width
);
3491 if (*newWidth
> maxsize
) *newWidth
= maxsize
;
3492 *newHeight
= nearestPower(height
);
3493 if (*newHeight
> maxsize
) *newHeight
= maxsize
;
3494 /*printf("NO proxy textures\n");*/
3496 } /* closestFit() */
3499 gluScaleImage(GLenum format
, GLsizei widthin
, GLsizei heightin
,
3500 GLenum typein
, const void *datain
,
3501 GLsizei widthout
, GLsizei heightout
, GLenum typeout
,
3505 GLushort
*beforeImage
;
3506 GLushort
*afterImage
;
3507 PixelStorageModes psm
;
3509 if (widthin
== 0 || heightin
== 0 || widthout
== 0 || heightout
== 0) {
3512 if (widthin
< 0 || heightin
< 0 || widthout
< 0 || heightout
< 0) {
3513 return GLU_INVALID_VALUE
;
3515 if (!legalFormat(format
) || !legalType(typein
) || !legalType(typeout
)) {
3516 return GLU_INVALID_ENUM
;
3518 if (!isLegalFormatForPackedPixelType(format
, typein
)) {
3519 return GLU_INVALID_OPERATION
;
3521 if (!isLegalFormatForPackedPixelType(format
, typeout
)) {
3522 return GLU_INVALID_OPERATION
;
3525 malloc(image_size(widthin
, heightin
, format
, GL_UNSIGNED_SHORT
));
3527 malloc(image_size(widthout
, heightout
, format
, GL_UNSIGNED_SHORT
));
3528 if (beforeImage
== NULL
|| afterImage
== NULL
) {
3531 return GLU_OUT_OF_MEMORY
;
3534 retrieveStoreModes(&psm
);
3535 fill_image(&psm
,widthin
, heightin
, format
, typein
, is_index(format
),
3536 datain
, beforeImage
);
3537 components
= elements_per_group(format
, 0);
3538 scale_internal(components
, widthin
, heightin
, beforeImage
,
3539 widthout
, heightout
, afterImage
);
3540 empty_image(&psm
,widthout
, heightout
, format
, typeout
,
3541 is_index(format
), afterImage
, dataout
);
3542 free((GLbyte
*) beforeImage
);
3543 free((GLbyte
*) afterImage
);
3548 int gluBuild1DMipmapLevelsCore(GLenum target
, GLint internalFormat
,
3550 GLsizei widthPowerOf2
,
3551 GLenum format
, GLenum type
,
3552 GLint userLevel
, GLint baseLevel
,GLint maxLevel
,
3556 GLint level
, levels
;
3558 GLint newImage_width
;
3559 GLushort
*otherImage
;
3560 GLushort
*imageTemp
;
3563 PixelStorageModes psm
;
3565 assert(checkMipmapArgs(internalFormat
,format
,type
) == 0);
3570 newwidth
= widthPowerOf2
;
3571 levels
= computeLog(newwidth
);
3575 retrieveStoreModes(&psm
);
3576 newImage
= (GLushort
*)
3577 malloc(image_size(width
, 1, format
, GL_UNSIGNED_SHORT
));
3578 newImage_width
= width
;
3579 if (newImage
== NULL
) {
3580 return GLU_OUT_OF_MEMORY
;
3582 fill_image(&psm
,width
, 1, format
, type
, is_index(format
),
3584 cmpts
= elements_per_group(format
,type
);
3585 glPixelStorei(GL_UNPACK_ALIGNMENT
, 2);
3586 glPixelStorei(GL_UNPACK_SKIP_ROWS
, 0);
3587 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, 0);
3588 glPixelStorei(GL_UNPACK_ROW_LENGTH
, 0);
3590 ** If swap_bytes was set, swapping occurred in fill_image.
3592 glPixelStorei(GL_UNPACK_SWAP_BYTES
, GL_FALSE
);
3594 for (level
= userLevel
; level
<= levels
; level
++) {
3595 if (newImage_width
== newwidth
) {
3596 /* Use newImage for this level */
3597 if (baseLevel
<= level
&& level
<= maxLevel
) {
3598 glTexImage1D(target
, level
, internalFormat
, newImage_width
,
3599 0, format
, GL_UNSIGNED_SHORT
, (void *) newImage
);
3602 if (otherImage
== NULL
) {
3603 memreq
= image_size(newwidth
, 1, format
, GL_UNSIGNED_SHORT
);
3604 otherImage
= (GLushort
*) malloc(memreq
);
3605 if (otherImage
== NULL
) {
3606 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
3607 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
3608 glPixelStorei(GL_UNPACK_SKIP_PIXELS
,psm
.unpack_skip_pixels
);
3609 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
3610 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
3611 return GLU_OUT_OF_MEMORY
;
3614 scale_internal(cmpts
, newImage_width
, 1, newImage
,
3615 newwidth
, 1, otherImage
);
3616 /* Swap newImage and otherImage */
3617 imageTemp
= otherImage
;
3618 otherImage
= newImage
;
3619 newImage
= imageTemp
;
3621 newImage_width
= newwidth
;
3622 if (baseLevel
<= level
&& level
<= maxLevel
) {
3623 glTexImage1D(target
, level
, internalFormat
, newImage_width
,
3624 0, format
, GL_UNSIGNED_SHORT
, (void *) newImage
);
3627 if (newwidth
> 1) newwidth
/= 2;
3629 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
3630 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
3631 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
3632 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
3633 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
3635 free((GLbyte
*) newImage
);
3637 free((GLbyte
*) otherImage
);
3643 gluBuild1DMipmapLevels(GLenum target
, GLint internalFormat
,
3645 GLenum format
, GLenum type
,
3646 GLint userLevel
, GLint baseLevel
, GLint maxLevel
,
3651 int rc
= checkMipmapArgs(internalFormat
,format
,type
);
3652 if (rc
!= 0) return rc
;
3655 return GLU_INVALID_VALUE
;
3658 levels
= computeLog(width
);
3661 if (!isLegalLevels(userLevel
,baseLevel
,maxLevel
,levels
))
3662 return GLU_INVALID_VALUE
;
3664 return gluBuild1DMipmapLevelsCore(target
, internalFormat
,
3667 userLevel
, baseLevel
, maxLevel
,
3669 } /* gluBuild1DMipmapLevels() */
3672 gluBuild1DMipmaps(GLenum target
, GLint internalFormat
, GLsizei width
,
3673 GLenum format
, GLenum type
,
3676 GLint widthPowerOf2
;
3680 int rc
= checkMipmapArgs(internalFormat
,format
,type
);
3681 if (rc
!= 0) return rc
;
3684 return GLU_INVALID_VALUE
;
3687 closestFit(target
,width
,1,internalFormat
,format
,type
,&widthPowerOf2
,&dummy
);
3688 levels
= computeLog(widthPowerOf2
);
3690 return gluBuild1DMipmapLevelsCore(target
,internalFormat
,
3693 format
,type
,0,0,levels
,data
);
3696 static int bitmapBuild2DMipmaps(GLenum target
, GLint internalFormat
,
3697 GLint width
, GLint height
, GLenum format
,
3698 GLenum type
, const void *data
)
3700 GLint newwidth
, newheight
;
3701 GLint level
, levels
;
3703 GLint newImage_width
;
3704 GLint newImage_height
;
3705 GLushort
*otherImage
;
3706 GLushort
*imageTemp
;
3709 PixelStorageModes psm
;
3711 retrieveStoreModes(&psm
);
3714 glGetIntegerv(GL_MAX_TEXTURE_SIZE
, &maxsize
);
3715 newwidth
= nearestPower(width
);
3716 if (newwidth
> maxsize
) newwidth
= maxsize
;
3717 newheight
= nearestPower(height
);
3718 if (newheight
> maxsize
) newheight
= maxsize
;
3720 closestFit(target
,width
,height
,internalFormat
,format
,type
,
3721 &newwidth
,&newheight
);
3723 levels
= computeLog(newwidth
);
3724 level
= computeLog(newheight
);
3725 if (level
> levels
) levels
=level
;
3728 newImage
= (GLushort
*)
3729 malloc(image_size(width
, height
, format
, GL_UNSIGNED_SHORT
));
3730 newImage_width
= width
;
3731 newImage_height
= height
;
3732 if (newImage
== NULL
) {
3733 return GLU_OUT_OF_MEMORY
;
3736 fill_image(&psm
,width
, height
, format
, type
, is_index(format
),
3739 cmpts
= elements_per_group(format
,type
);
3740 glPixelStorei(GL_UNPACK_ALIGNMENT
, 2);
3741 glPixelStorei(GL_UNPACK_SKIP_ROWS
, 0);
3742 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, 0);
3743 glPixelStorei(GL_UNPACK_ROW_LENGTH
, 0);
3745 ** If swap_bytes was set, swapping occurred in fill_image.
3747 glPixelStorei(GL_UNPACK_SWAP_BYTES
, GL_FALSE
);
3749 for (level
= 0; level
<= levels
; level
++) {
3750 if (newImage_width
== newwidth
&& newImage_height
== newheight
) { /* Use newImage for this level */
3751 glTexImage2D(target
, level
, internalFormat
, newImage_width
,
3752 newImage_height
, 0, format
, GL_UNSIGNED_SHORT
,
3755 if (otherImage
== NULL
) {
3757 image_size(newwidth
, newheight
, format
, GL_UNSIGNED_SHORT
);
3758 otherImage
= (GLushort
*) malloc(memreq
);
3759 if (otherImage
== NULL
) {
3760 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
3761 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
3762 glPixelStorei(GL_UNPACK_SKIP_PIXELS
,psm
.unpack_skip_pixels
);
3763 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
3764 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
3765 return GLU_OUT_OF_MEMORY
;
3768 scale_internal(cmpts
, newImage_width
, newImage_height
, newImage
,
3769 newwidth
, newheight
, otherImage
);
3770 /* Swap newImage and otherImage */
3771 imageTemp
= otherImage
;
3772 otherImage
= newImage
;
3773 newImage
= imageTemp
;
3775 newImage_width
= newwidth
;
3776 newImage_height
= newheight
;
3777 glTexImage2D(target
, level
, internalFormat
, newImage_width
,
3778 newImage_height
, 0, format
, GL_UNSIGNED_SHORT
,
3781 if (newwidth
> 1) newwidth
/= 2;
3782 if (newheight
> 1) newheight
/= 2;
3784 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
3785 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
3786 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
3787 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
3788 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
3790 free((GLbyte
*) newImage
);
3792 free((GLbyte
*) otherImage
);
3797 /* To make swapping images less error prone */
3798 #define __GLU_INIT_SWAP_IMAGE void *tmpImage
3799 #define __GLU_SWAP_IMAGE(a,b) tmpImage = a; a = b; b = tmpImage;
3801 static int gluBuild2DMipmapLevelsCore(GLenum target
, GLint internalFormat
,
3802 GLsizei width
, GLsizei height
,
3803 GLsizei widthPowerOf2
,
3804 GLsizei heightPowerOf2
,
3805 GLenum format
, GLenum type
,
3807 GLint baseLevel
,GLint maxLevel
,
3810 GLint newwidth
, newheight
;
3811 GLint level
, levels
;
3812 const void *usersImage
; /* passed from user. Don't touch! */
3813 void *srcImage
, *dstImage
; /* scratch area to build mipmapped images */
3814 __GLU_INIT_SWAP_IMAGE
;
3818 GLint myswap_bytes
, groups_per_line
, element_size
, group_size
;
3819 GLint rowsize
, padding
;
3820 PixelStorageModes psm
;
3822 assert(checkMipmapArgs(internalFormat
,format
,type
) == 0);
3823 assert(width
>= 1 && height
>= 1);
3825 if(type
== GL_BITMAP
) {
3826 return bitmapBuild2DMipmaps(target
, internalFormat
, width
, height
,
3827 format
, type
, data
);
3830 srcImage
= dstImage
= NULL
;
3832 newwidth
= widthPowerOf2
;
3833 newheight
= heightPowerOf2
;
3834 levels
= computeLog(newwidth
);
3835 level
= computeLog(newheight
);
3836 if (level
> levels
) levels
=level
;
3840 retrieveStoreModes(&psm
);
3841 myswap_bytes
= psm
.unpack_swap_bytes
;
3842 cmpts
= elements_per_group(format
,type
);
3843 if (psm
.unpack_row_length
> 0) {
3844 groups_per_line
= psm
.unpack_row_length
;
3846 groups_per_line
= width
;
3849 element_size
= bytes_per_element(type
);
3850 group_size
= element_size
* cmpts
;
3851 if (element_size
== 1) myswap_bytes
= 0;
3853 rowsize
= groups_per_line
* group_size
;
3854 padding
= (rowsize
% psm
.unpack_alignment
);
3856 rowsize
+= psm
.unpack_alignment
- padding
;
3858 usersImage
= (const GLubyte
*) data
+ psm
.unpack_skip_rows
* rowsize
+
3859 psm
.unpack_skip_pixels
* group_size
;
3861 glPixelStorei(GL_UNPACK_SKIP_ROWS
, 0);
3862 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, 0);
3863 glPixelStorei(GL_UNPACK_ROW_LENGTH
, 0);
3867 /* already power-of-two square */
3868 if (width
== newwidth
&& height
== newheight
) {
3869 /* Use usersImage for level userLevel */
3870 if (baseLevel
<= level
&& level
<= maxLevel
) {
3871 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
3872 glTexImage2D(target
, level
, internalFormat
, width
,
3873 height
, 0, format
, type
,
3876 glPixelStorei(GL_UNPACK_ROW_LENGTH
, 0);
3877 if(levels
== 0) { /* we're done. clean up and return */
3878 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
3879 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
3880 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
3881 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
3882 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
3886 int nextWidth
= newwidth
/2;
3887 int nextHeight
= newheight
/2;
3890 if (nextWidth
< 1) nextWidth
= 1;
3891 if (nextHeight
< 1) nextHeight
= 1;
3892 memreq
= image_size(nextWidth
, nextHeight
, format
, type
);
3896 case GL_UNSIGNED_BYTE
:
3897 dstImage
= (GLubyte
*)malloc(memreq
);
3900 dstImage
= (GLbyte
*)malloc(memreq
);
3902 case GL_UNSIGNED_SHORT
:
3903 dstImage
= (GLushort
*)malloc(memreq
);
3906 dstImage
= (GLshort
*)malloc(memreq
);
3908 case GL_UNSIGNED_INT
:
3909 dstImage
= (GLuint
*)malloc(memreq
);
3912 dstImage
= (GLint
*)malloc(memreq
);
3915 dstImage
= (GLfloat
*)malloc(memreq
);
3917 case GL_UNSIGNED_BYTE_3_3_2
:
3918 case GL_UNSIGNED_BYTE_2_3_3_REV
:
3919 dstImage
= (GLubyte
*)malloc(memreq
);
3921 case GL_UNSIGNED_SHORT_5_6_5
:
3922 case GL_UNSIGNED_SHORT_5_6_5_REV
:
3923 case GL_UNSIGNED_SHORT_4_4_4_4
:
3924 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
3925 case GL_UNSIGNED_SHORT_5_5_5_1
:
3926 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
3927 dstImage
= (GLushort
*)malloc(memreq
);
3929 case GL_UNSIGNED_INT_8_8_8_8
:
3930 case GL_UNSIGNED_INT_8_8_8_8_REV
:
3931 case GL_UNSIGNED_INT_10_10_10_2
:
3932 case GL_UNSIGNED_INT_2_10_10_10_REV
:
3933 dstImage
= (GLuint
*)malloc(memreq
);
3936 return GLU_INVALID_ENUM
;
3938 if (dstImage
== NULL
) {
3939 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
3940 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
3941 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
3942 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
3943 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
3944 return GLU_OUT_OF_MEMORY
;
3948 case GL_UNSIGNED_BYTE
:
3949 halveImage_ubyte(cmpts
, width
, height
,
3950 (const GLubyte
*)usersImage
, (GLubyte
*)dstImage
,
3951 element_size
, rowsize
, group_size
);
3954 halveImage_byte(cmpts
, width
, height
,
3955 (const GLbyte
*)usersImage
, (GLbyte
*)dstImage
,
3956 element_size
, rowsize
, group_size
);
3958 case GL_UNSIGNED_SHORT
:
3959 halveImage_ushort(cmpts
, width
, height
,
3960 (const GLushort
*)usersImage
, (GLushort
*)dstImage
,
3961 element_size
, rowsize
, group_size
, myswap_bytes
);
3964 halveImage_short(cmpts
, width
, height
,
3965 (const GLshort
*)usersImage
, (GLshort
*)dstImage
,
3966 element_size
, rowsize
, group_size
, myswap_bytes
);
3968 case GL_UNSIGNED_INT
:
3969 halveImage_uint(cmpts
, width
, height
,
3970 (const GLuint
*)usersImage
, (GLuint
*)dstImage
,
3971 element_size
, rowsize
, group_size
, myswap_bytes
);
3974 halveImage_int(cmpts
, width
, height
,
3975 (const GLint
*)usersImage
, (GLint
*)dstImage
,
3976 element_size
, rowsize
, group_size
, myswap_bytes
);
3979 halveImage_float(cmpts
, width
, height
,
3980 (const GLfloat
*)usersImage
, (GLfloat
*)dstImage
,
3981 element_size
, rowsize
, group_size
, myswap_bytes
);
3983 case GL_UNSIGNED_BYTE_3_3_2
:
3984 assert(format
== GL_RGB
);
3985 halveImagePackedPixel(3,extract332
,shove332
,
3986 width
,height
,usersImage
,dstImage
,
3987 element_size
,rowsize
,myswap_bytes
);
3989 case GL_UNSIGNED_BYTE_2_3_3_REV
:
3990 assert(format
== GL_RGB
);
3991 halveImagePackedPixel(3,extract233rev
,shove233rev
,
3992 width
,height
,usersImage
,dstImage
,
3993 element_size
,rowsize
,myswap_bytes
);
3995 case GL_UNSIGNED_SHORT_5_6_5
:
3996 halveImagePackedPixel(3,extract565
,shove565
,
3997 width
,height
,usersImage
,dstImage
,
3998 element_size
,rowsize
,myswap_bytes
);
4000 case GL_UNSIGNED_SHORT_5_6_5_REV
:
4001 halveImagePackedPixel(3,extract565rev
,shove565rev
,
4002 width
,height
,usersImage
,dstImage
,
4003 element_size
,rowsize
,myswap_bytes
);
4005 case GL_UNSIGNED_SHORT_4_4_4_4
:
4006 halveImagePackedPixel(4,extract4444
,shove4444
,
4007 width
,height
,usersImage
,dstImage
,
4008 element_size
,rowsize
,myswap_bytes
);
4010 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
4011 halveImagePackedPixel(4,extract4444rev
,shove4444rev
,
4012 width
,height
,usersImage
,dstImage
,
4013 element_size
,rowsize
,myswap_bytes
);
4015 case GL_UNSIGNED_SHORT_5_5_5_1
:
4016 halveImagePackedPixel(4,extract5551
,shove5551
,
4017 width
,height
,usersImage
,dstImage
,
4018 element_size
,rowsize
,myswap_bytes
);
4020 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
4021 halveImagePackedPixel(4,extract1555rev
,shove1555rev
,
4022 width
,height
,usersImage
,dstImage
,
4023 element_size
,rowsize
,myswap_bytes
);
4025 case GL_UNSIGNED_INT_8_8_8_8
:
4026 halveImagePackedPixel(4,extract8888
,shove8888
,
4027 width
,height
,usersImage
,dstImage
,
4028 element_size
,rowsize
,myswap_bytes
);
4030 case GL_UNSIGNED_INT_8_8_8_8_REV
:
4031 halveImagePackedPixel(4,extract8888rev
,shove8888rev
,
4032 width
,height
,usersImage
,dstImage
,
4033 element_size
,rowsize
,myswap_bytes
);
4035 case GL_UNSIGNED_INT_10_10_10_2
:
4036 halveImagePackedPixel(4,extract1010102
,shove1010102
,
4037 width
,height
,usersImage
,dstImage
,
4038 element_size
,rowsize
,myswap_bytes
);
4040 case GL_UNSIGNED_INT_2_10_10_10_REV
:
4041 halveImagePackedPixel(4,extract2101010rev
,shove2101010rev
,
4042 width
,height
,usersImage
,dstImage
,
4043 element_size
,rowsize
,myswap_bytes
);
4050 newheight
= height
/2;
4052 if (newwidth
< 1) newwidth
= 1;
4053 if (newheight
< 1) newheight
= 1;
4056 rowsize
= newwidth
* group_size
;
4057 memreq
= image_size(newwidth
, newheight
, format
, type
);
4058 /* Swap srcImage and dstImage */
4059 __GLU_SWAP_IMAGE(srcImage
,dstImage
);
4061 case GL_UNSIGNED_BYTE
:
4062 dstImage
= (GLubyte
*)malloc(memreq
);
4065 dstImage
= (GLbyte
*)malloc(memreq
);
4067 case GL_UNSIGNED_SHORT
:
4068 dstImage
= (GLushort
*)malloc(memreq
);
4071 dstImage
= (GLshort
*)malloc(memreq
);
4073 case GL_UNSIGNED_INT
:
4074 dstImage
= (GLuint
*)malloc(memreq
);
4077 dstImage
= (GLint
*)malloc(memreq
);
4080 dstImage
= (GLfloat
*)malloc(memreq
);
4082 case GL_UNSIGNED_BYTE_3_3_2
:
4083 case GL_UNSIGNED_BYTE_2_3_3_REV
:
4084 dstImage
= (GLubyte
*)malloc(memreq
);
4086 case GL_UNSIGNED_SHORT_5_6_5
:
4087 case GL_UNSIGNED_SHORT_5_6_5_REV
:
4088 case GL_UNSIGNED_SHORT_4_4_4_4
:
4089 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
4090 case GL_UNSIGNED_SHORT_5_5_5_1
:
4091 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
4092 dstImage
= (GLushort
*)malloc(memreq
);
4094 case GL_UNSIGNED_INT_8_8_8_8
:
4095 case GL_UNSIGNED_INT_8_8_8_8_REV
:
4096 case GL_UNSIGNED_INT_10_10_10_2
:
4097 case GL_UNSIGNED_INT_2_10_10_10_REV
:
4098 dstImage
= (GLuint
*)malloc(memreq
);
4101 return GLU_INVALID_ENUM
;
4103 if (dstImage
== NULL
) {
4104 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
4105 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
4106 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
4107 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
4108 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
4109 return GLU_OUT_OF_MEMORY
;
4111 /* level userLevel+1 is in srcImage; level userLevel already saved */
4112 level
= userLevel
+1;
4113 } else { /* user's image is *not* nice power-of-2 sized square */
4114 memreq
= image_size(newwidth
, newheight
, format
, type
);
4116 case GL_UNSIGNED_BYTE
:
4117 dstImage
= (GLubyte
*)malloc(memreq
);
4120 dstImage
= (GLbyte
*)malloc(memreq
);
4122 case GL_UNSIGNED_SHORT
:
4123 dstImage
= (GLushort
*)malloc(memreq
);
4126 dstImage
= (GLshort
*)malloc(memreq
);
4128 case GL_UNSIGNED_INT
:
4129 dstImage
= (GLuint
*)malloc(memreq
);
4132 dstImage
= (GLint
*)malloc(memreq
);
4135 dstImage
= (GLfloat
*)malloc(memreq
);
4137 case GL_UNSIGNED_BYTE_3_3_2
:
4138 case GL_UNSIGNED_BYTE_2_3_3_REV
:
4139 dstImage
= (GLubyte
*)malloc(memreq
);
4141 case GL_UNSIGNED_SHORT_5_6_5
:
4142 case GL_UNSIGNED_SHORT_5_6_5_REV
:
4143 case GL_UNSIGNED_SHORT_4_4_4_4
:
4144 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
4145 case GL_UNSIGNED_SHORT_5_5_5_1
:
4146 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
4147 dstImage
= (GLushort
*)malloc(memreq
);
4149 case GL_UNSIGNED_INT_8_8_8_8
:
4150 case GL_UNSIGNED_INT_8_8_8_8_REV
:
4151 case GL_UNSIGNED_INT_10_10_10_2
:
4152 case GL_UNSIGNED_INT_2_10_10_10_REV
:
4153 dstImage
= (GLuint
*)malloc(memreq
);
4156 return GLU_INVALID_ENUM
;
4159 if (dstImage
== NULL
) {
4160 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
4161 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
4162 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
4163 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
4164 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
4165 return GLU_OUT_OF_MEMORY
;
4169 case GL_UNSIGNED_BYTE
:
4170 scale_internal_ubyte(cmpts
, width
, height
,
4171 (const GLubyte
*)usersImage
, newwidth
, newheight
,
4172 (GLubyte
*)dstImage
, element_size
,
4173 rowsize
, group_size
);
4176 scale_internal_byte(cmpts
, width
, height
,
4177 (const GLbyte
*)usersImage
, newwidth
, newheight
,
4178 (GLbyte
*)dstImage
, element_size
,
4179 rowsize
, group_size
);
4181 case GL_UNSIGNED_SHORT
:
4182 scale_internal_ushort(cmpts
, width
, height
,
4183 (const GLushort
*)usersImage
, newwidth
, newheight
,
4184 (GLushort
*)dstImage
, element_size
,
4185 rowsize
, group_size
, myswap_bytes
);
4188 scale_internal_short(cmpts
, width
, height
,
4189 (const GLshort
*)usersImage
, newwidth
, newheight
,
4190 (GLshort
*)dstImage
, element_size
,
4191 rowsize
, group_size
, myswap_bytes
);
4193 case GL_UNSIGNED_INT
:
4194 scale_internal_uint(cmpts
, width
, height
,
4195 (const GLuint
*)usersImage
, newwidth
, newheight
,
4196 (GLuint
*)dstImage
, element_size
,
4197 rowsize
, group_size
, myswap_bytes
);
4200 scale_internal_int(cmpts
, width
, height
,
4201 (const GLint
*)usersImage
, newwidth
, newheight
,
4202 (GLint
*)dstImage
, element_size
,
4203 rowsize
, group_size
, myswap_bytes
);
4206 scale_internal_float(cmpts
, width
, height
,
4207 (const GLfloat
*)usersImage
, newwidth
, newheight
,
4208 (GLfloat
*)dstImage
, element_size
,
4209 rowsize
, group_size
, myswap_bytes
);
4211 case GL_UNSIGNED_BYTE_3_3_2
:
4212 scaleInternalPackedPixel(3,extract332
,shove332
,
4213 width
, height
,usersImage
,
4214 newwidth
,newheight
,(void *)dstImage
,
4215 element_size
,rowsize
,myswap_bytes
);
4217 case GL_UNSIGNED_BYTE_2_3_3_REV
:
4218 scaleInternalPackedPixel(3,extract233rev
,shove233rev
,
4219 width
, height
,usersImage
,
4220 newwidth
,newheight
,(void *)dstImage
,
4221 element_size
,rowsize
,myswap_bytes
);
4223 case GL_UNSIGNED_SHORT_5_6_5
:
4224 scaleInternalPackedPixel(3,extract565
,shove565
,
4225 width
, height
,usersImage
,
4226 newwidth
,newheight
,(void *)dstImage
,
4227 element_size
,rowsize
,myswap_bytes
);
4229 case GL_UNSIGNED_SHORT_5_6_5_REV
:
4230 scaleInternalPackedPixel(3,extract565rev
,shove565rev
,
4231 width
, height
,usersImage
,
4232 newwidth
,newheight
,(void *)dstImage
,
4233 element_size
,rowsize
,myswap_bytes
);
4235 case GL_UNSIGNED_SHORT_4_4_4_4
:
4236 scaleInternalPackedPixel(4,extract4444
,shove4444
,
4237 width
, height
,usersImage
,
4238 newwidth
,newheight
,(void *)dstImage
,
4239 element_size
,rowsize
,myswap_bytes
);
4241 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
4242 scaleInternalPackedPixel(4,extract4444rev
,shove4444rev
,
4243 width
, height
,usersImage
,
4244 newwidth
,newheight
,(void *)dstImage
,
4245 element_size
,rowsize
,myswap_bytes
);
4247 case GL_UNSIGNED_SHORT_5_5_5_1
:
4248 scaleInternalPackedPixel(4,extract5551
,shove5551
,
4249 width
, height
,usersImage
,
4250 newwidth
,newheight
,(void *)dstImage
,
4251 element_size
,rowsize
,myswap_bytes
);
4253 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
4254 scaleInternalPackedPixel(4,extract1555rev
,shove1555rev
,
4255 width
, height
,usersImage
,
4256 newwidth
,newheight
,(void *)dstImage
,
4257 element_size
,rowsize
,myswap_bytes
);
4259 case GL_UNSIGNED_INT_8_8_8_8
:
4260 scaleInternalPackedPixel(4,extract8888
,shove8888
,
4261 width
, height
,usersImage
,
4262 newwidth
,newheight
,(void *)dstImage
,
4263 element_size
,rowsize
,myswap_bytes
);
4265 case GL_UNSIGNED_INT_8_8_8_8_REV
:
4266 scaleInternalPackedPixel(4,extract8888rev
,shove8888rev
,
4267 width
, height
,usersImage
,
4268 newwidth
,newheight
,(void *)dstImage
,
4269 element_size
,rowsize
,myswap_bytes
);
4271 case GL_UNSIGNED_INT_10_10_10_2
:
4272 scaleInternalPackedPixel(4,extract1010102
,shove1010102
,
4273 width
, height
,usersImage
,
4274 newwidth
,newheight
,(void *)dstImage
,
4275 element_size
,rowsize
,myswap_bytes
);
4277 case GL_UNSIGNED_INT_2_10_10_10_REV
:
4278 scaleInternalPackedPixel(4,extract2101010rev
,shove2101010rev
,
4279 width
, height
,usersImage
,
4280 newwidth
,newheight
,(void *)dstImage
,
4281 element_size
,rowsize
,myswap_bytes
);
4288 rowsize
= newwidth
* group_size
;
4289 /* Swap dstImage and srcImage */
4290 __GLU_SWAP_IMAGE(srcImage
,dstImage
);
4292 if(levels
!= 0) { /* use as little memory as possible */
4294 int nextWidth
= newwidth
/2;
4295 int nextHeight
= newheight
/2;
4296 if (nextWidth
< 1) nextWidth
= 1;
4297 if (nextHeight
< 1) nextHeight
= 1;
4299 memreq
= image_size(nextWidth
, nextHeight
, format
, type
);
4303 case GL_UNSIGNED_BYTE
:
4304 dstImage
= (GLubyte
*)malloc(memreq
);
4307 dstImage
= (GLbyte
*)malloc(memreq
);
4309 case GL_UNSIGNED_SHORT
:
4310 dstImage
= (GLushort
*)malloc(memreq
);
4313 dstImage
= (GLshort
*)malloc(memreq
);
4315 case GL_UNSIGNED_INT
:
4316 dstImage
= (GLuint
*)malloc(memreq
);
4319 dstImage
= (GLint
*)malloc(memreq
);
4322 dstImage
= (GLfloat
*)malloc(memreq
);
4324 case GL_UNSIGNED_BYTE_3_3_2
:
4325 case GL_UNSIGNED_BYTE_2_3_3_REV
:
4326 dstImage
= (GLubyte
*)malloc(memreq
);
4328 case GL_UNSIGNED_SHORT_5_6_5
:
4329 case GL_UNSIGNED_SHORT_5_6_5_REV
:
4330 case GL_UNSIGNED_SHORT_4_4_4_4
:
4331 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
4332 case GL_UNSIGNED_SHORT_5_5_5_1
:
4333 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
4334 dstImage
= (GLushort
*)malloc(memreq
);
4336 case GL_UNSIGNED_INT_8_8_8_8
:
4337 case GL_UNSIGNED_INT_8_8_8_8_REV
:
4338 case GL_UNSIGNED_INT_10_10_10_2
:
4339 case GL_UNSIGNED_INT_2_10_10_10_REV
:
4340 dstImage
= (GLuint
*)malloc(memreq
);
4343 return GLU_INVALID_ENUM
;
4345 if (dstImage
== NULL
) {
4346 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
4347 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
4348 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
4349 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
4350 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
4351 return GLU_OUT_OF_MEMORY
;
4354 /* level userLevel is in srcImage; nothing saved yet */
4358 glPixelStorei(GL_UNPACK_SWAP_BYTES
, GL_FALSE
);
4359 if (baseLevel
<= level
&& level
<= maxLevel
) {
4360 glTexImage2D(target
, level
, internalFormat
, newwidth
, newheight
, 0,
4361 format
, type
, (void *)srcImage
);
4364 level
++; /* update current level for the loop */
4365 for (; level
<= levels
; level
++) {
4367 case GL_UNSIGNED_BYTE
:
4368 halveImage_ubyte(cmpts
, newwidth
, newheight
,
4369 (GLubyte
*)srcImage
, (GLubyte
*)dstImage
, element_size
,
4370 rowsize
, group_size
);
4373 halveImage_byte(cmpts
, newwidth
, newheight
,
4374 (GLbyte
*)srcImage
, (GLbyte
*)dstImage
, element_size
,
4375 rowsize
, group_size
);
4377 case GL_UNSIGNED_SHORT
:
4378 halveImage_ushort(cmpts
, newwidth
, newheight
,
4379 (GLushort
*)srcImage
, (GLushort
*)dstImage
, element_size
,
4380 rowsize
, group_size
, myswap_bytes
);
4383 halveImage_short(cmpts
, newwidth
, newheight
,
4384 (GLshort
*)srcImage
, (GLshort
*)dstImage
, element_size
,
4385 rowsize
, group_size
, myswap_bytes
);
4387 case GL_UNSIGNED_INT
:
4388 halveImage_uint(cmpts
, newwidth
, newheight
,
4389 (GLuint
*)srcImage
, (GLuint
*)dstImage
, element_size
,
4390 rowsize
, group_size
, myswap_bytes
);
4393 halveImage_int(cmpts
, newwidth
, newheight
,
4394 (GLint
*)srcImage
, (GLint
*)dstImage
, element_size
,
4395 rowsize
, group_size
, myswap_bytes
);
4398 halveImage_float(cmpts
, newwidth
, newheight
,
4399 (GLfloat
*)srcImage
, (GLfloat
*)dstImage
, element_size
,
4400 rowsize
, group_size
, myswap_bytes
);
4402 case GL_UNSIGNED_BYTE_3_3_2
:
4403 halveImagePackedPixel(3,extract332
,shove332
,
4405 srcImage
,dstImage
,element_size
,rowsize
,
4408 case GL_UNSIGNED_BYTE_2_3_3_REV
:
4409 halveImagePackedPixel(3,extract233rev
,shove233rev
,
4411 srcImage
,dstImage
,element_size
,rowsize
,
4414 case GL_UNSIGNED_SHORT_5_6_5
:
4415 halveImagePackedPixel(3,extract565
,shove565
,
4417 srcImage
,dstImage
,element_size
,rowsize
,
4420 case GL_UNSIGNED_SHORT_5_6_5_REV
:
4421 halveImagePackedPixel(3,extract565rev
,shove565rev
,
4423 srcImage
,dstImage
,element_size
,rowsize
,
4426 case GL_UNSIGNED_SHORT_4_4_4_4
:
4427 halveImagePackedPixel(4,extract4444
,shove4444
,
4429 srcImage
,dstImage
,element_size
,rowsize
,
4432 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
4433 halveImagePackedPixel(4,extract4444rev
,shove4444rev
,
4435 srcImage
,dstImage
,element_size
,rowsize
,
4438 case GL_UNSIGNED_SHORT_5_5_5_1
:
4439 halveImagePackedPixel(4,extract5551
,shove5551
,
4441 srcImage
,dstImage
,element_size
,rowsize
,
4444 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
4445 halveImagePackedPixel(4,extract1555rev
,shove1555rev
,
4447 srcImage
,dstImage
,element_size
,rowsize
,
4450 case GL_UNSIGNED_INT_8_8_8_8
:
4451 halveImagePackedPixel(4,extract8888
,shove8888
,
4453 srcImage
,dstImage
,element_size
,rowsize
,
4456 case GL_UNSIGNED_INT_8_8_8_8_REV
:
4457 halveImagePackedPixel(4,extract8888rev
,shove8888rev
,
4459 srcImage
,dstImage
,element_size
,rowsize
,
4462 case GL_UNSIGNED_INT_10_10_10_2
:
4463 halveImagePackedPixel(4,extract1010102
,shove1010102
,
4465 srcImage
,dstImage
,element_size
,rowsize
,
4468 case GL_UNSIGNED_INT_2_10_10_10_REV
:
4469 halveImagePackedPixel(4,extract2101010rev
,shove2101010rev
,
4471 srcImage
,dstImage
,element_size
,rowsize
,
4479 __GLU_SWAP_IMAGE(srcImage
,dstImage
);
4481 if (newwidth
> 1) { newwidth
/= 2; rowsize
/= 2;}
4482 if (newheight
> 1) newheight
/= 2;
4484 /* compute amount to pad per row, if any */
4485 int rowPad
= rowsize
% psm
.unpack_alignment
;
4487 /* should row be padded? */
4488 if (rowPad
== 0) { /* nope, row should not be padded */
4489 /* call tex image with srcImage untouched since it's not padded */
4490 if (baseLevel
<= level
&& level
<= maxLevel
) {
4491 glTexImage2D(target
, level
, internalFormat
, newwidth
, newheight
, 0,
4492 format
, type
, (void *) srcImage
);
4495 else { /* yes, row should be padded */
4496 /* compute length of new row in bytes, including padding */
4497 int newRowLength
= rowsize
+ psm
.unpack_alignment
- rowPad
;
4498 int ii
; unsigned char *dstTrav
, *srcTrav
; /* indices for copying */
4500 /* allocate new image for mipmap of size newRowLength x newheight */
4501 void *newMipmapImage
= malloc((size_t) (newRowLength
*newheight
));
4502 if (newMipmapImage
== NULL
) {
4503 /* out of memory so return */
4504 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
4505 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
4506 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
4507 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
4508 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
4509 return GLU_OUT_OF_MEMORY
;
4512 /* copy image from srcImage into newMipmapImage by rows */
4514 dstTrav
= (unsigned char *) newMipmapImage
,
4515 srcTrav
= (unsigned char *) srcImage
;
4518 dstTrav
+= newRowLength
, /* make sure the correct distance... */
4519 srcTrav
+= rowsize
) { /* ...is skipped */
4520 memcpy(dstTrav
,srcTrav
,rowsize
);
4521 /* note that the pad bytes are not visited and will contain
4522 * garbage, which is ok.
4526 /* ...and use this new image for mipmapping instead */
4527 if (baseLevel
<= level
&& level
<= maxLevel
) {
4528 glTexImage2D(target
, level
, internalFormat
, newwidth
, newheight
, 0,
4529 format
, type
, newMipmapImage
);
4531 free(newMipmapImage
); /* don't forget to free it! */
4535 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
4536 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
4537 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
4538 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
4539 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
4541 free(srcImage
); /*if you get to here, a srcImage has always been malloc'ed*/
4542 if (dstImage
) { /* if it's non-rectangular and only 1 level */
4546 } /* gluBuild2DMipmapLevelsCore() */
4549 gluBuild2DMipmapLevels(GLenum target
, GLint internalFormat
,
4550 GLsizei width
, GLsizei height
,
4551 GLenum format
, GLenum type
,
4552 GLint userLevel
, GLint baseLevel
, GLint maxLevel
,
4557 int rc
= checkMipmapArgs(internalFormat
,format
,type
);
4558 if (rc
!= 0) return rc
;
4560 if (width
< 1 || height
< 1) {
4561 return GLU_INVALID_VALUE
;
4564 levels
= computeLog(width
);
4565 level
= computeLog(height
);
4566 if (level
> levels
) levels
=level
;
4569 if (!isLegalLevels(userLevel
,baseLevel
,maxLevel
,levels
))
4570 return GLU_INVALID_VALUE
;
4572 return gluBuild2DMipmapLevelsCore(target
, internalFormat
,
4576 userLevel
, baseLevel
, maxLevel
,
4578 } /* gluBuild2DMipmapLevels() */
4581 gluBuild2DMipmaps(GLenum target
, GLint internalFormat
,
4582 GLsizei width
, GLsizei height
,
4583 GLenum format
, GLenum type
,
4586 GLint widthPowerOf2
, heightPowerOf2
;
4589 int rc
= checkMipmapArgs(internalFormat
,format
,type
);
4590 if (rc
!= 0) return rc
;
4592 if (width
< 1 || height
< 1) {
4593 return GLU_INVALID_VALUE
;
4596 closestFit(target
,width
,height
,internalFormat
,format
,type
,
4597 &widthPowerOf2
,&heightPowerOf2
);
4599 levels
= computeLog(widthPowerOf2
);
4600 level
= computeLog(heightPowerOf2
);
4601 if (level
> levels
) levels
=level
;
4603 return gluBuild2DMipmapLevelsCore(target
,internalFormat
,
4605 widthPowerOf2
,heightPowerOf2
,
4608 } /* gluBuild2DMipmaps() */
4612 ** This routine is for the limited case in which
4613 ** type == GL_UNSIGNED_BYTE && format != index &&
4614 ** unpack_alignment = 1 && unpack_swap_bytes == false
4616 ** so all of the work data can be kept as ubytes instead of shorts.
4618 static int fastBuild2DMipmaps(const PixelStorageModes
*psm
,
4619 GLenum target
, GLint components
, GLint width
,
4620 GLint height
, GLenum format
,
4621 GLenum type
, void *data
)
4623 GLint newwidth
, newheight
;
4624 GLint level
, levels
;
4626 GLint newImage_width
;
4627 GLint newImage_height
;
4628 GLubyte
*otherImage
;
4635 glGetIntegerv(GL_MAX_TEXTURE_SIZE
, &maxsize
);
4636 newwidth
= nearestPower(width
);
4637 if (newwidth
> maxsize
) newwidth
= maxsize
;
4638 newheight
= nearestPower(height
);
4639 if (newheight
> maxsize
) newheight
= maxsize
;
4641 closestFit(target
,width
,height
,components
,format
,type
,
4642 &newwidth
,&newheight
);
4644 levels
= computeLog(newwidth
);
4645 level
= computeLog(newheight
);
4646 if (level
> levels
) levels
=level
;
4648 cmpts
= elements_per_group(format
,type
);
4652 ** No need to copy the user data if its in the packed correctly.
4653 ** Make sure that later routines don't change that data.
4655 if (psm
->unpack_skip_rows
== 0 && psm
->unpack_skip_pixels
== 0) {
4656 newImage
= (GLubyte
*)data
;
4657 newImage_width
= width
;
4658 newImage_height
= height
;
4661 GLint groups_per_line
;
4662 GLint elements_per_line
;
4663 const GLubyte
*start
;
4664 const GLubyte
*iter
;
4668 newImage
= (GLubyte
*)
4669 malloc(image_size(width
, height
, format
, GL_UNSIGNED_BYTE
));
4670 newImage_width
= width
;
4671 newImage_height
= height
;
4672 if (newImage
== NULL
) {
4673 return GLU_OUT_OF_MEMORY
;
4677 ** Abbreviated version of fill_image for this restricted case.
4679 if (psm
->unpack_row_length
> 0) {
4680 groups_per_line
= psm
->unpack_row_length
;
4682 groups_per_line
= width
;
4684 rowsize
= groups_per_line
* cmpts
;
4685 elements_per_line
= width
* cmpts
;
4686 start
= (const GLubyte
*) data
+ psm
->unpack_skip_rows
* rowsize
+
4687 psm
->unpack_skip_pixels
* cmpts
;
4690 for (i
= 0; i
< height
; i
++) {
4692 for (j
= 0; j
< elements_per_line
; j
++) {
4702 glPixelStorei(GL_UNPACK_ALIGNMENT
, 1);
4703 glPixelStorei(GL_UNPACK_SKIP_ROWS
, 0);
4704 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, 0);
4705 glPixelStorei(GL_UNPACK_ROW_LENGTH
, 0);
4706 glPixelStorei(GL_UNPACK_SWAP_BYTES
, GL_FALSE
);
4708 for (level
= 0; level
<= levels
; level
++) {
4709 if (newImage_width
== newwidth
&& newImage_height
== newheight
) {
4710 /* Use newImage for this level */
4711 glTexImage2D(target
, level
, components
, newImage_width
,
4712 newImage_height
, 0, format
, GL_UNSIGNED_BYTE
,
4715 if (otherImage
== NULL
) {
4717 image_size(newwidth
, newheight
, format
, GL_UNSIGNED_BYTE
);
4718 otherImage
= (GLubyte
*) malloc(memreq
);
4719 if (otherImage
== NULL
) {
4720 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
->unpack_alignment
);
4721 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
->unpack_skip_rows
);
4722 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
->unpack_skip_pixels
);
4723 glPixelStorei(GL_UNPACK_ROW_LENGTH
,psm
->unpack_row_length
);
4724 glPixelStorei(GL_UNPACK_SWAP_BYTES
,psm
->unpack_swap_bytes
);
4725 return GLU_OUT_OF_MEMORY
;
4729 scale_internal_ubyte(cmpts, newImage_width, newImage_height,
4730 newImage, newwidth, newheight, otherImage);
4732 /* Swap newImage and otherImage */
4733 imageTemp
= otherImage
;
4734 otherImage
= newImage
;
4735 newImage
= imageTemp
;
4737 newImage_width
= newwidth
;
4738 newImage_height
= newheight
;
4739 glTexImage2D(target
, level
, components
, newImage_width
,
4740 newImage_height
, 0, format
, GL_UNSIGNED_BYTE
,
4743 if (newwidth
> 1) newwidth
/= 2;
4744 if (newheight
> 1) newheight
/= 2;
4746 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
->unpack_alignment
);
4747 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
->unpack_skip_rows
);
4748 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
->unpack_skip_pixels
);
4749 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
->unpack_row_length
);
4750 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
->unpack_swap_bytes
);
4752 if (newImage
!= (const GLubyte
*)data
) {
4753 free((GLbyte
*) newImage
);
4755 if (otherImage
&& otherImage
!= (const GLubyte
*)data
) {
4756 free((GLbyte
*) otherImage
);
4765 static GLint
elements_per_group(GLenum format
, GLenum type
)
4768 * Return the number of elements per group of a specified format
4771 /* If the type is packedpixels then answer is 1 (ignore format) */
4772 if (type
== GL_UNSIGNED_BYTE_3_3_2
||
4773 type
== GL_UNSIGNED_BYTE_2_3_3_REV
||
4774 type
== GL_UNSIGNED_SHORT_5_6_5
||
4775 type
== GL_UNSIGNED_SHORT_5_6_5_REV
||
4776 type
== GL_UNSIGNED_SHORT_4_4_4_4
||
4777 type
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
4778 type
== GL_UNSIGNED_SHORT_5_5_5_1
||
4779 type
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
4780 type
== GL_UNSIGNED_INT_8_8_8_8
||
4781 type
== GL_UNSIGNED_INT_8_8_8_8_REV
||
4782 type
== GL_UNSIGNED_INT_10_10_10_2
||
4783 type
== GL_UNSIGNED_INT_2_10_10_10_REV
) {
4787 /* Types are not packed pixels, so get elements per group */
4792 case GL_LUMINANCE_ALPHA
:
4802 static GLfloat
bytes_per_element(GLenum type
)
4805 * Return the number of bytes per element, based on the element type
4810 case GL_UNSIGNED_SHORT
:
4811 return(sizeof(GLushort
));
4813 return(sizeof(GLshort
));
4814 case GL_UNSIGNED_BYTE
:
4815 return(sizeof(GLubyte
));
4817 return(sizeof(GLbyte
));
4819 return(sizeof(GLint
));
4820 case GL_UNSIGNED_INT
:
4821 return(sizeof(GLuint
));
4823 return(sizeof(GLfloat
));
4824 case GL_UNSIGNED_BYTE_3_3_2
:
4825 case GL_UNSIGNED_BYTE_2_3_3_REV
:
4826 return(sizeof(GLubyte
));
4827 case GL_UNSIGNED_SHORT_5_6_5
:
4828 case GL_UNSIGNED_SHORT_5_6_5_REV
:
4829 case GL_UNSIGNED_SHORT_4_4_4_4
:
4830 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
4831 case GL_UNSIGNED_SHORT_5_5_5_1
:
4832 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
4833 return(sizeof(GLushort
));
4834 case GL_UNSIGNED_INT_8_8_8_8
:
4835 case GL_UNSIGNED_INT_8_8_8_8_REV
:
4836 case GL_UNSIGNED_INT_10_10_10_2
:
4837 case GL_UNSIGNED_INT_2_10_10_10_REV
:
4838 return(sizeof(GLuint
));
4844 static GLint
is_index(GLenum format
)
4846 return format
== GL_COLOR_INDEX
|| format
== GL_STENCIL_INDEX
;
4850 ** Compute memory required for internal packed array of data of given type
4853 static GLint
image_size(GLint width
, GLint height
, GLenum format
, GLenum type
)
4860 components
= elements_per_group(format
,type
);
4861 if (type
== GL_BITMAP
) {
4862 bytes_per_row
= (width
+ 7) / 8;
4864 bytes_per_row
= bytes_per_element(type
) * width
;
4866 return bytes_per_row
* height
* components
;
4870 ** Extract array from user's data applying all pixel store modes.
4871 ** The internal format used is an array of unsigned shorts.
4873 static void fill_image(const PixelStorageModes
*psm
,
4874 GLint width
, GLint height
, GLenum format
,
4875 GLenum type
, GLboolean index_format
,
4876 const void *userdata
, GLushort
*newimage
)
4882 GLint groups_per_line
;
4884 GLint elements_per_line
;
4885 const GLubyte
*start
;
4886 const GLubyte
*iter
;
4891 myswap_bytes
= psm
->unpack_swap_bytes
;
4892 components
= elements_per_group(format
,type
);
4893 if (psm
->unpack_row_length
> 0) {
4894 groups_per_line
= psm
->unpack_row_length
;
4896 groups_per_line
= width
;
4899 /* All formats except GL_BITMAP fall out trivially */
4900 if (type
== GL_BITMAP
) {
4904 rowsize
= (groups_per_line
* components
+ 7) / 8;
4905 padding
= (rowsize
% psm
->unpack_alignment
);
4907 rowsize
+= psm
->unpack_alignment
- padding
;
4909 start
= (const GLubyte
*) userdata
+ psm
->unpack_skip_rows
* rowsize
+
4910 (psm
->unpack_skip_pixels
* components
/ 8);
4911 elements_per_line
= width
* components
;
4913 for (i
= 0; i
< height
; i
++) {
4915 bit_offset
= (psm
->unpack_skip_pixels
* components
) % 8;
4916 for (j
= 0; j
< elements_per_line
; j
++) {
4918 if (psm
->unpack_lsb_first
) {
4919 current_bit
= iter
[0] & (1 << bit_offset
);
4921 current_bit
= iter
[0] & (1 << (7 - bit_offset
));
4933 if (bit_offset
== 8) {
4942 element_size
= bytes_per_element(type
);
4943 group_size
= element_size
* components
;
4944 if (element_size
== 1) myswap_bytes
= 0;
4946 rowsize
= groups_per_line
* group_size
;
4947 padding
= (rowsize
% psm
->unpack_alignment
);
4949 rowsize
+= psm
->unpack_alignment
- padding
;
4951 start
= (const GLubyte
*) userdata
+ psm
->unpack_skip_rows
* rowsize
+
4952 psm
->unpack_skip_pixels
* group_size
;
4953 elements_per_line
= width
* components
;
4956 for (i
= 0; i
< height
; i
++) {
4958 for (j
= 0; j
< elements_per_line
; j
++) {
4960 float extractComponents
[4];
4963 case GL_UNSIGNED_BYTE_3_3_2
:
4964 extract332(0,iter
,extractComponents
);
4965 for (k
= 0; k
< 3; k
++) {
4966 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
4969 case GL_UNSIGNED_BYTE_2_3_3_REV
:
4970 extract233rev(0,iter
,extractComponents
);
4971 for (k
= 0; k
< 3; k
++) {
4972 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
4975 case GL_UNSIGNED_BYTE
:
4979 *iter2
++ = (*iter
) * 257;
4984 *iter2
++ = *((const GLbyte
*) iter
);
4987 *iter2
++ = (*((const GLbyte
*) iter
)) * 516;
4990 case GL_UNSIGNED_SHORT_5_6_5
:
4991 extract565(myswap_bytes
,iter
,extractComponents
);
4992 for (k
= 0; k
< 3; k
++) {
4993 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
4996 case GL_UNSIGNED_SHORT_5_6_5_REV
:
4997 extract565rev(myswap_bytes
,iter
,extractComponents
);
4998 for (k
= 0; k
< 3; k
++) {
4999 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
5002 case GL_UNSIGNED_SHORT_4_4_4_4
:
5003 extract4444(myswap_bytes
,iter
,extractComponents
);
5004 for (k
= 0; k
< 4; k
++) {
5005 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
5008 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
5009 extract4444rev(myswap_bytes
,iter
,extractComponents
);
5010 for (k
= 0; k
< 4; k
++) {
5011 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
5014 case GL_UNSIGNED_SHORT_5_5_5_1
:
5015 extract5551(myswap_bytes
,iter
,extractComponents
);
5016 for (k
= 0; k
< 4; k
++) {
5017 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
5020 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
5021 extract1555rev(myswap_bytes
,iter
,extractComponents
);
5022 for (k
= 0; k
< 4; k
++) {
5023 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
5026 case GL_UNSIGNED_SHORT
:
5029 widget
.ub
[0] = iter
[1];
5030 widget
.ub
[1] = iter
[0];
5032 widget
.ub
[0] = iter
[0];
5033 widget
.ub
[1] = iter
[1];
5035 if (type
== GL_SHORT
) {
5037 *iter2
++ = widget
.s
[0];
5040 *iter2
++ = widget
.s
[0]*2;
5043 *iter2
++ = widget
.us
[0];
5046 case GL_UNSIGNED_INT_8_8_8_8
:
5047 extract8888(myswap_bytes
,iter
,extractComponents
);
5048 for (k
= 0; k
< 4; k
++) {
5049 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
5052 case GL_UNSIGNED_INT_8_8_8_8_REV
:
5053 extract8888rev(myswap_bytes
,iter
,extractComponents
);
5054 for (k
= 0; k
< 4; k
++) {
5055 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
5058 case GL_UNSIGNED_INT_10_10_10_2
:
5059 extract1010102(myswap_bytes
,iter
,extractComponents
);
5060 for (k
= 0; k
< 4; k
++) {
5061 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
5064 case GL_UNSIGNED_INT_2_10_10_10_REV
:
5065 extract2101010rev(myswap_bytes
,iter
,extractComponents
);
5066 for (k
= 0; k
< 4; k
++) {
5067 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
5071 case GL_UNSIGNED_INT
:
5074 widget
.ub
[0] = iter
[3];
5075 widget
.ub
[1] = iter
[2];
5076 widget
.ub
[2] = iter
[1];
5077 widget
.ub
[3] = iter
[0];
5079 widget
.ub
[0] = iter
[0];
5080 widget
.ub
[1] = iter
[1];
5081 widget
.ub
[2] = iter
[2];
5082 widget
.ub
[3] = iter
[3];
5084 if (type
== GL_FLOAT
) {
5086 *iter2
++ = widget
.f
;
5088 *iter2
++ = 65535 * widget
.f
;
5090 } else if (type
== GL_UNSIGNED_INT
) {
5092 *iter2
++ = widget
.ui
;
5094 *iter2
++ = widget
.ui
>> 16;
5098 *iter2
++ = widget
.i
;
5100 *iter2
++ = widget
.i
>> 15;
5105 iter
+= element_size
;
5109 /* want 'iter' pointing at start, not within, row for assertion
5116 /* iterators should be one byte past end */
5117 if (!isTypePackedPixel(type
)) {
5118 assert(iter2
== &newimage
[width
*height
*components
]);
5121 assert(iter2
== &newimage
[width
*height
*
5122 elements_per_group(format
,0)]);
5124 assert( iter
== &((const GLubyte
*)userdata
)[rowsize
*height
+
5125 psm
->unpack_skip_rows
* rowsize
+
5126 psm
->unpack_skip_pixels
* group_size
] );
5129 } /* fill_image() */
5132 ** Insert array into user's data applying all pixel store modes.
5133 ** The internal format is an array of unsigned shorts.
5134 ** empty_image() because it is the opposite of fill_image().
5136 static void empty_image(const PixelStorageModes
*psm
,
5137 GLint width
, GLint height
, GLenum format
,
5138 GLenum type
, GLboolean index_format
,
5139 const GLushort
*oldimage
, void *userdata
)
5145 GLint groups_per_line
;
5147 GLint elements_per_line
;
5150 const GLushort
*iter2
;
5154 myswap_bytes
= psm
->pack_swap_bytes
;
5155 components
= elements_per_group(format
,type
);
5156 if (psm
->pack_row_length
> 0) {
5157 groups_per_line
= psm
->pack_row_length
;
5159 groups_per_line
= width
;
5162 /* All formats except GL_BITMAP fall out trivially */
5163 if (type
== GL_BITMAP
) {
5167 rowsize
= (groups_per_line
* components
+ 7) / 8;
5168 padding
= (rowsize
% psm
->pack_alignment
);
5170 rowsize
+= psm
->pack_alignment
- padding
;
5172 start
= (GLubyte
*) userdata
+ psm
->pack_skip_rows
* rowsize
+
5173 (psm
->pack_skip_pixels
* components
/ 8);
5174 elements_per_line
= width
* components
;
5176 for (i
= 0; i
< height
; i
++) {
5178 bit_offset
= (psm
->pack_skip_pixels
* components
) % 8;
5179 for (j
= 0; j
< elements_per_line
; j
++) {
5181 current_bit
= iter2
[0] & 1;
5183 if (iter2
[0] > 32767) {
5191 if (psm
->pack_lsb_first
) {
5192 *iter
|= (1 << bit_offset
);
5194 *iter
|= (1 << (7 - bit_offset
));
5197 if (psm
->pack_lsb_first
) {
5198 *iter
&= ~(1 << bit_offset
);
5200 *iter
&= ~(1 << (7 - bit_offset
));
5205 if (bit_offset
== 8) {
5214 float shoveComponents
[4];
5216 element_size
= bytes_per_element(type
);
5217 group_size
= element_size
* components
;
5218 if (element_size
== 1) myswap_bytes
= 0;
5220 rowsize
= groups_per_line
* group_size
;
5221 padding
= (rowsize
% psm
->pack_alignment
);
5223 rowsize
+= psm
->pack_alignment
- padding
;
5225 start
= (GLubyte
*) userdata
+ psm
->pack_skip_rows
* rowsize
+
5226 psm
->pack_skip_pixels
* group_size
;
5227 elements_per_line
= width
* components
;
5230 for (i
= 0; i
< height
; i
++) {
5232 for (j
= 0; j
< elements_per_line
; j
++) {
5236 case GL_UNSIGNED_BYTE_3_3_2
:
5237 for (k
= 0; k
< 3; k
++) {
5238 shoveComponents
[k
]= *iter2
++ / 65535.0;
5240 shove332(shoveComponents
,0,(void *)iter
);
5242 case GL_UNSIGNED_BYTE_2_3_3_REV
:
5243 for (k
= 0; k
< 3; k
++) {
5244 shoveComponents
[k
]= *iter2
++ / 65535.0;
5246 shove233rev(shoveComponents
,0,(void *)iter
);
5248 case GL_UNSIGNED_BYTE
:
5252 *iter
= *iter2
++ >> 8;
5257 *((GLbyte
*) iter
) = *iter2
++;
5259 *((GLbyte
*) iter
) = *iter2
++ >> 9;
5262 case GL_UNSIGNED_SHORT_5_6_5
:
5263 for (k
= 0; k
< 3; k
++) {
5264 shoveComponents
[k
]= *iter2
++ / 65535.0;
5266 shove565(shoveComponents
,0,(void *)&widget
.us
[0]);
5268 iter
[0] = widget
.ub
[1];
5269 iter
[1] = widget
.ub
[0];
5272 *(GLushort
*)iter
= widget
.us
[0];
5275 case GL_UNSIGNED_SHORT_5_6_5_REV
:
5276 for (k
= 0; k
< 3; k
++) {
5277 shoveComponents
[k
]= *iter2
++ / 65535.0;
5279 shove565rev(shoveComponents
,0,(void *)&widget
.us
[0]);
5281 iter
[0] = widget
.ub
[1];
5282 iter
[1] = widget
.ub
[0];
5285 *(GLushort
*)iter
= widget
.us
[0];
5288 case GL_UNSIGNED_SHORT_4_4_4_4
:
5289 for (k
= 0; k
< 4; k
++) {
5290 shoveComponents
[k
]= *iter2
++ / 65535.0;
5292 shove4444(shoveComponents
,0,(void *)&widget
.us
[0]);
5294 iter
[0] = widget
.ub
[1];
5295 iter
[1] = widget
.ub
[0];
5297 *(GLushort
*)iter
= widget
.us
[0];
5300 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
5301 for (k
= 0; k
< 4; k
++) {
5302 shoveComponents
[k
]= *iter2
++ / 65535.0;
5304 shove4444rev(shoveComponents
,0,(void *)&widget
.us
[0]);
5306 iter
[0] = widget
.ub
[1];
5307 iter
[1] = widget
.ub
[0];
5309 *(GLushort
*)iter
= widget
.us
[0];
5312 case GL_UNSIGNED_SHORT_5_5_5_1
:
5313 for (k
= 0; k
< 4; k
++) {
5314 shoveComponents
[k
]= *iter2
++ / 65535.0;
5316 shove5551(shoveComponents
,0,(void *)&widget
.us
[0]);
5318 iter
[0] = widget
.ub
[1];
5319 iter
[1] = widget
.ub
[0];
5321 *(GLushort
*)iter
= widget
.us
[0];
5324 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
5325 for (k
= 0; k
< 4; k
++) {
5326 shoveComponents
[k
]= *iter2
++ / 65535.0;
5328 shove1555rev(shoveComponents
,0,(void *)&widget
.us
[0]);
5330 iter
[0] = widget
.ub
[1];
5331 iter
[1] = widget
.ub
[0];
5333 *(GLushort
*)iter
= widget
.us
[0];
5336 case GL_UNSIGNED_SHORT
:
5338 if (type
== GL_SHORT
) {
5340 widget
.s
[0] = *iter2
++;
5342 widget
.s
[0] = *iter2
++ >> 1;
5345 widget
.us
[0] = *iter2
++;
5348 iter
[0] = widget
.ub
[1];
5349 iter
[1] = widget
.ub
[0];
5351 iter
[0] = widget
.ub
[0];
5352 iter
[1] = widget
.ub
[1];
5355 case GL_UNSIGNED_INT_8_8_8_8
:
5356 for (k
= 0; k
< 4; k
++) {
5357 shoveComponents
[k
]= *iter2
++ / 65535.0;
5359 shove8888(shoveComponents
,0,(void *)&widget
.ui
);
5361 iter
[3] = widget
.ub
[0];
5362 iter
[2] = widget
.ub
[1];
5363 iter
[1] = widget
.ub
[2];
5364 iter
[0] = widget
.ub
[3];
5366 *(GLuint
*)iter
= widget
.ui
;
5370 case GL_UNSIGNED_INT_8_8_8_8_REV
:
5371 for (k
= 0; k
< 4; k
++) {
5372 shoveComponents
[k
]= *iter2
++ / 65535.0;
5374 shove8888rev(shoveComponents
,0,(void *)&widget
.ui
);
5376 iter
[3] = widget
.ub
[0];
5377 iter
[2] = widget
.ub
[1];
5378 iter
[1] = widget
.ub
[2];
5379 iter
[0] = widget
.ub
[3];
5381 *(GLuint
*)iter
= widget
.ui
;
5384 case GL_UNSIGNED_INT_10_10_10_2
:
5385 for (k
= 0; k
< 4; k
++) {
5386 shoveComponents
[k
]= *iter2
++ / 65535.0;
5388 shove1010102(shoveComponents
,0,(void *)&widget
.ui
);
5390 iter
[3] = widget
.ub
[0];
5391 iter
[2] = widget
.ub
[1];
5392 iter
[1] = widget
.ub
[2];
5393 iter
[0] = widget
.ub
[3];
5395 *(GLuint
*)iter
= widget
.ui
;
5398 case GL_UNSIGNED_INT_2_10_10_10_REV
:
5399 for (k
= 0; k
< 4; k
++) {
5400 shoveComponents
[k
]= *iter2
++ / 65535.0;
5402 shove2101010rev(shoveComponents
,0,(void *)&widget
.ui
);
5404 iter
[3] = widget
.ub
[0];
5405 iter
[2] = widget
.ub
[1];
5406 iter
[1] = widget
.ub
[2];
5407 iter
[0] = widget
.ub
[3];
5409 *(GLuint
*)iter
= widget
.ui
;
5413 case GL_UNSIGNED_INT
:
5415 if (type
== GL_FLOAT
) {
5417 widget
.f
= *iter2
++;
5419 widget
.f
= *iter2
++ / (float) 65535.0;
5421 } else if (type
== GL_UNSIGNED_INT
) {
5423 widget
.ui
= *iter2
++;
5425 widget
.ui
= (unsigned int) *iter2
++ * 65537;
5429 widget
.i
= *iter2
++;
5431 widget
.i
= ((unsigned int) *iter2
++ * 65537)/2;
5435 iter
[3] = widget
.ub
[0];
5436 iter
[2] = widget
.ub
[1];
5437 iter
[1] = widget
.ub
[2];
5438 iter
[0] = widget
.ub
[3];
5440 iter
[0] = widget
.ub
[0];
5441 iter
[1] = widget
.ub
[1];
5442 iter
[2] = widget
.ub
[2];
5443 iter
[3] = widget
.ub
[3];
5447 iter
+= element_size
;
5451 /* want 'iter' pointing at start, not within, row for assertion
5458 /* iterators should be one byte past end */
5459 if (!isTypePackedPixel(type
)) {
5460 assert(iter2
== &oldimage
[width
*height
*components
]);
5463 assert(iter2
== &oldimage
[width
*height
*
5464 elements_per_group(format
,0)]);
5466 assert( iter
== &((GLubyte
*)userdata
)[rowsize
*height
+
5467 psm
->pack_skip_rows
* rowsize
+
5468 psm
->pack_skip_pixels
* group_size
] );
5471 } /* empty_image() */
5473 /*--------------------------------------------------------------------------
5474 * Decimation of packed pixel types
5475 *--------------------------------------------------------------------------
5477 static void extract332(int isSwap
,
5478 const void *packedPixel
, GLfloat extractComponents
[])
5480 GLubyte ubyte
= *(const GLubyte
*)packedPixel
;
5482 isSwap
= isSwap
; /* turn off warnings */
5484 /* 11100000 == 0xe0 */
5485 /* 00011100 == 0x1c */
5486 /* 00000011 == 0x03 */
5488 extractComponents
[0]= (float)((ubyte
& 0xe0) >> 5) / 7.0;
5489 extractComponents
[1]= (float)((ubyte
& 0x1c) >> 2) / 7.0; /* 7 = 2^3-1 */
5490 extractComponents
[2]= (float)((ubyte
& 0x03) ) / 3.0; /* 3 = 2^2-1 */
5491 } /* extract332() */
5493 static void shove332(const GLfloat shoveComponents
[],
5494 int index
, void *packedPixel
)
5496 /* 11100000 == 0xe0 */
5497 /* 00011100 == 0x1c */
5498 /* 00000011 == 0x03 */
5500 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5501 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5502 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5504 /* due to limited precision, need to round before shoving */
5505 ((GLubyte
*)packedPixel
)[index
] =
5506 ((GLubyte
)((shoveComponents
[0] * 7)+0.5) << 5) & 0xe0;
5507 ((GLubyte
*)packedPixel
)[index
] |=
5508 ((GLubyte
)((shoveComponents
[1] * 7)+0.5) << 2) & 0x1c;
5509 ((GLubyte
*)packedPixel
)[index
] |=
5510 ((GLubyte
)((shoveComponents
[2] * 3)+0.5) ) & 0x03;
5513 static void extract233rev(int isSwap
,
5514 const void *packedPixel
, GLfloat extractComponents
[])
5516 GLubyte ubyte
= *(const GLubyte
*)packedPixel
;
5518 isSwap
= isSwap
; /* turn off warnings */
5520 /* 0000,0111 == 0x07 */
5521 /* 0011,1000 == 0x38 */
5522 /* 1100,0000 == 0xC0 */
5524 extractComponents
[0]= (float)((ubyte
& 0x07) ) / 7.0;
5525 extractComponents
[1]= (float)((ubyte
& 0x38) >> 3) / 7.0;
5526 extractComponents
[2]= (float)((ubyte
& 0xC0) >> 6) / 3.0;
5527 } /* extract233rev() */
5529 static void shove233rev(const GLfloat shoveComponents
[],
5530 int index
, void *packedPixel
)
5532 /* 0000,0111 == 0x07 */
5533 /* 0011,1000 == 0x38 */
5534 /* 1100,0000 == 0xC0 */
5536 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5537 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5538 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5540 /* due to limited precision, need to round before shoving */
5541 ((GLubyte
*)packedPixel
)[index
] =
5542 ((GLubyte
)((shoveComponents
[0] * 7.0)+0.5) ) & 0x07;
5543 ((GLubyte
*)packedPixel
)[index
]|=
5544 ((GLubyte
)((shoveComponents
[1] * 7.0)+0.5) << 3) & 0x38;
5545 ((GLubyte
*)packedPixel
)[index
]|=
5546 ((GLubyte
)((shoveComponents
[2] * 3.0)+0.5) << 6) & 0xC0;
5547 } /* shove233rev() */
5549 static void extract565(int isSwap
,
5550 const void *packedPixel
, GLfloat extractComponents
[])
5552 GLushort ushort
= *(const GLushort
*)packedPixel
;
5555 ushort
= __GLU_SWAP_2_BYTES(packedPixel
);
5558 ushort
= *(const GLushort
*)packedPixel
;
5561 /* 11111000,00000000 == 0xf800 */
5562 /* 00000111,11100000 == 0x07e0 */
5563 /* 00000000,00011111 == 0x001f */
5565 extractComponents
[0]=(float)((ushort
& 0xf800) >> 11) / 31.0;/* 31 = 2^5-1*/
5566 extractComponents
[1]=(float)((ushort
& 0x07e0) >> 5) / 63.0;/* 63 = 2^6-1*/
5567 extractComponents
[2]=(float)((ushort
& 0x001f) ) / 31.0;
5568 } /* extract565() */
5570 static void shove565(const GLfloat shoveComponents
[],
5571 int index
,void *packedPixel
)
5573 /* 11111000,00000000 == 0xf800 */
5574 /* 00000111,11100000 == 0x07e0 */
5575 /* 00000000,00011111 == 0x001f */
5577 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5578 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5579 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5581 /* due to limited precision, need to round before shoving */
5582 ((GLushort
*)packedPixel
)[index
] =
5583 ((GLushort
)((shoveComponents
[0] * 31)+0.5) << 11) & 0xf800;
5584 ((GLushort
*)packedPixel
)[index
]|=
5585 ((GLushort
)((shoveComponents
[1] * 63)+0.5) << 5) & 0x07e0;
5586 ((GLushort
*)packedPixel
)[index
]|=
5587 ((GLushort
)((shoveComponents
[2] * 31)+0.5) ) & 0x001f;
5590 static void extract565rev(int isSwap
,
5591 const void *packedPixel
, GLfloat extractComponents
[])
5593 GLushort ushort
= *(const GLushort
*)packedPixel
;
5596 ushort
= __GLU_SWAP_2_BYTES(packedPixel
);
5599 ushort
= *(const GLushort
*)packedPixel
;
5602 /* 00000000,00011111 == 0x001f */
5603 /* 00000111,11100000 == 0x07e0 */
5604 /* 11111000,00000000 == 0xf800 */
5606 extractComponents
[0]= (float)((ushort
& 0x001F) ) / 31.0;
5607 extractComponents
[1]= (float)((ushort
& 0x07E0) >> 5) / 63.0;
5608 extractComponents
[2]= (float)((ushort
& 0xF800) >> 11) / 31.0;
5609 } /* extract565rev() */
5611 static void shove565rev(const GLfloat shoveComponents
[],
5612 int index
,void *packedPixel
)
5614 /* 00000000,00011111 == 0x001f */
5615 /* 00000111,11100000 == 0x07e0 */
5616 /* 11111000,00000000 == 0xf800 */
5618 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5619 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5620 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5622 /* due to limited precision, need to round before shoving */
5623 ((GLushort
*)packedPixel
)[index
] =
5624 ((GLushort
)((shoveComponents
[0] * 31.0)+0.5) ) & 0x001F;
5625 ((GLushort
*)packedPixel
)[index
]|=
5626 ((GLushort
)((shoveComponents
[1] * 63.0)+0.5) << 5) & 0x07E0;
5627 ((GLushort
*)packedPixel
)[index
]|=
5628 ((GLushort
)((shoveComponents
[2] * 31.0)+0.5) << 11) & 0xF800;
5629 } /* shove565rev() */
5631 static void extract4444(int isSwap
,const void *packedPixel
,
5632 GLfloat extractComponents
[])
5637 ushort
= __GLU_SWAP_2_BYTES(packedPixel
);
5640 ushort
= *(const GLushort
*)packedPixel
;
5643 /* 11110000,00000000 == 0xf000 */
5644 /* 00001111,00000000 == 0x0f00 */
5645 /* 00000000,11110000 == 0x00f0 */
5646 /* 00000000,00001111 == 0x000f */
5648 extractComponents
[0]= (float)((ushort
& 0xf000) >> 12) / 15.0;/* 15=2^4-1 */
5649 extractComponents
[1]= (float)((ushort
& 0x0f00) >> 8) / 15.0;
5650 extractComponents
[2]= (float)((ushort
& 0x00f0) >> 4) / 15.0;
5651 extractComponents
[3]= (float)((ushort
& 0x000f) ) / 15.0;
5652 } /* extract4444() */
5654 static void shove4444(const GLfloat shoveComponents
[],
5655 int index
,void *packedPixel
)
5657 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5658 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5659 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5660 assert(0.0 <= shoveComponents
[3] && shoveComponents
[3] <= 1.0);
5662 /* due to limited precision, need to round before shoving */
5663 ((GLushort
*)packedPixel
)[index
] =
5664 ((GLushort
)((shoveComponents
[0] * 15)+0.5) << 12) & 0xf000;
5665 ((GLushort
*)packedPixel
)[index
]|=
5666 ((GLushort
)((shoveComponents
[1] * 15)+0.5) << 8) & 0x0f00;
5667 ((GLushort
*)packedPixel
)[index
]|=
5668 ((GLushort
)((shoveComponents
[2] * 15)+0.5) << 4) & 0x00f0;
5669 ((GLushort
*)packedPixel
)[index
]|=
5670 ((GLushort
)((shoveComponents
[3] * 15)+0.5) ) & 0x000f;
5673 static void extract4444rev(int isSwap
,const void *packedPixel
,
5674 GLfloat extractComponents
[])
5679 ushort
= __GLU_SWAP_2_BYTES(packedPixel
);
5682 ushort
= *(const GLushort
*)packedPixel
;
5685 /* 00000000,00001111 == 0x000f */
5686 /* 00000000,11110000 == 0x00f0 */
5687 /* 00001111,00000000 == 0x0f00 */
5688 /* 11110000,00000000 == 0xf000 */
5691 extractComponents
[0]= (float)((ushort
& 0x000F) ) / 15.0;
5692 extractComponents
[1]= (float)((ushort
& 0x00F0) >> 4) / 15.0;
5693 extractComponents
[2]= (float)((ushort
& 0x0F00) >> 8) / 15.0;
5694 extractComponents
[3]= (float)((ushort
& 0xF000) >> 12) / 15.0;
5695 } /* extract4444rev() */
5697 static void shove4444rev(const GLfloat shoveComponents
[],
5698 int index
,void *packedPixel
)
5700 /* 00000000,00001111 == 0x000f */
5701 /* 00000000,11110000 == 0x00f0 */
5702 /* 00001111,00000000 == 0x0f00 */
5703 /* 11110000,00000000 == 0xf000 */
5705 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5706 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5707 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5708 assert(0.0 <= shoveComponents
[3] && shoveComponents
[3] <= 1.0);
5710 /* due to limited precision, need to round before shoving */
5711 ((GLushort
*)packedPixel
)[index
] =
5712 ((GLushort
)((shoveComponents
[0] * 15)+0.5) ) & 0x000F;
5713 ((GLushort
*)packedPixel
)[index
]|=
5714 ((GLushort
)((shoveComponents
[1] * 15)+0.5) << 4) & 0x00F0;
5715 ((GLushort
*)packedPixel
)[index
]|=
5716 ((GLushort
)((shoveComponents
[2] * 15)+0.5) << 8) & 0x0F00;
5717 ((GLushort
*)packedPixel
)[index
]|=
5718 ((GLushort
)((shoveComponents
[3] * 15)+0.5) << 12) & 0xF000;
5719 } /* shove4444rev() */
5721 static void extract5551(int isSwap
,const void *packedPixel
,
5722 GLfloat extractComponents
[])
5727 ushort
= __GLU_SWAP_2_BYTES(packedPixel
);
5730 ushort
= *(const GLushort
*)packedPixel
;
5733 /* 11111000,00000000 == 0xf800 */
5734 /* 00000111,11000000 == 0x07c0 */
5735 /* 00000000,00111110 == 0x003e */
5736 /* 00000000,00000001 == 0x0001 */
5738 extractComponents
[0]=(float)((ushort
& 0xf800) >> 11) / 31.0;/* 31 = 2^5-1*/
5739 extractComponents
[1]=(float)((ushort
& 0x07c0) >> 6) / 31.0;
5740 extractComponents
[2]=(float)((ushort
& 0x003e) >> 1) / 31.0;
5741 extractComponents
[3]=(float)((ushort
& 0x0001) );
5742 } /* extract5551() */
5744 static void shove5551(const GLfloat shoveComponents
[],
5745 int index
,void *packedPixel
)
5747 /* 11111000,00000000 == 0xf800 */
5748 /* 00000111,11000000 == 0x07c0 */
5749 /* 00000000,00111110 == 0x003e */
5750 /* 00000000,00000001 == 0x0001 */
5752 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5753 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5754 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5755 assert(0.0 <= shoveComponents
[3] && shoveComponents
[3] <= 1.0);
5757 /* due to limited precision, need to round before shoving */
5758 ((GLushort
*)packedPixel
)[index
] =
5759 ((GLushort
)((shoveComponents
[0] * 31)+0.5) << 11) & 0xf800;
5760 ((GLushort
*)packedPixel
)[index
]|=
5761 ((GLushort
)((shoveComponents
[1] * 31)+0.5) << 6) & 0x07c0;
5762 ((GLushort
*)packedPixel
)[index
]|=
5763 ((GLushort
)((shoveComponents
[2] * 31)+0.5) << 1) & 0x003e;
5764 ((GLushort
*)packedPixel
)[index
]|=
5765 ((GLushort
)((shoveComponents
[3])+0.5) ) & 0x0001;
5768 static void extract1555rev(int isSwap
,const void *packedPixel
,
5769 GLfloat extractComponents
[])
5774 ushort
= __GLU_SWAP_2_BYTES(packedPixel
);
5777 ushort
= *(const GLushort
*)packedPixel
;
5780 /* 00000000,00011111 == 0x001F */
5781 /* 00000011,11100000 == 0x03E0 */
5782 /* 01111100,00000000 == 0x7C00 */
5783 /* 10000000,00000000 == 0x8000 */
5786 extractComponents
[0]= (float)((ushort
& 0x001F) ) / 31.0;
5787 extractComponents
[1]= (float)((ushort
& 0x03E0) >> 5) / 31.0;
5788 extractComponents
[2]= (float)((ushort
& 0x7C00) >> 10) / 31.0;
5789 extractComponents
[3]= (float)((ushort
& 0x8000) >> 15);
5790 } /* extract1555rev() */
5792 static void shove1555rev(const GLfloat shoveComponents
[],
5793 int index
,void *packedPixel
)
5795 /* 00000000,00011111 == 0x001F */
5796 /* 00000011,11100000 == 0x03E0 */
5797 /* 01111100,00000000 == 0x7C00 */
5798 /* 10000000,00000000 == 0x8000 */
5800 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5801 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5802 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5803 assert(0.0 <= shoveComponents
[3] && shoveComponents
[3] <= 1.0);
5805 /* due to limited precision, need to round before shoving */
5806 ((GLushort
*)packedPixel
)[index
] =
5807 ((GLushort
)((shoveComponents
[0] * 31)+0.5) ) & 0x001F;
5808 ((GLushort
*)packedPixel
)[index
]|=
5809 ((GLushort
)((shoveComponents
[1] * 31)+0.5) << 5) & 0x03E0;
5810 ((GLushort
*)packedPixel
)[index
]|=
5811 ((GLushort
)((shoveComponents
[2] * 31)+0.5) << 10) & 0x7C00;
5812 ((GLushort
*)packedPixel
)[index
]|=
5813 ((GLushort
)((shoveComponents
[3])+0.5) << 15) & 0x8000;
5814 } /* shove1555rev() */
5816 static void extract8888(int isSwap
,
5817 const void *packedPixel
, GLfloat extractComponents
[])
5822 uint
= __GLU_SWAP_4_BYTES(packedPixel
);
5825 uint
= *(const GLuint
*)packedPixel
;
5828 /* 11111111,00000000,00000000,00000000 == 0xff000000 */
5829 /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */
5830 /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */
5831 /* 00000000,00000000,00000000,11111111 == 0x000000ff */
5834 extractComponents
[0]= (float)((uint
& 0xff000000) >> 24) / 255.0;
5835 extractComponents
[1]= (float)((uint
& 0x00ff0000) >> 16) / 255.0;
5836 extractComponents
[2]= (float)((uint
& 0x0000ff00) >> 8) / 255.0;
5837 extractComponents
[3]= (float)((uint
& 0x000000ff) ) / 255.0;
5838 } /* extract8888() */
5840 static void shove8888(const GLfloat shoveComponents
[],
5841 int index
,void *packedPixel
)
5843 /* 11111111,00000000,00000000,00000000 == 0xff000000 */
5844 /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */
5845 /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */
5846 /* 00000000,00000000,00000000,11111111 == 0x000000ff */
5848 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5849 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5850 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5851 assert(0.0 <= shoveComponents
[3] && shoveComponents
[3] <= 1.0);
5853 /* due to limited precision, need to round before shoving */
5854 ((GLuint
*)packedPixel
)[index
] =
5855 ((GLuint
)((shoveComponents
[0] * 255)+0.5) << 24) & 0xff000000;
5856 ((GLuint
*)packedPixel
)[index
]|=
5857 ((GLuint
)((shoveComponents
[1] * 255)+0.5) << 16) & 0x00ff0000;
5858 ((GLuint
*)packedPixel
)[index
]|=
5859 ((GLuint
)((shoveComponents
[2] * 255)+0.5) << 8) & 0x0000ff00;
5860 ((GLuint
*)packedPixel
)[index
]|=
5861 ((GLuint
)((shoveComponents
[3] * 255)+0.5) ) & 0x000000ff;
5864 static void extract8888rev(int isSwap
,
5865 const void *packedPixel
,GLfloat extractComponents
[])
5870 uint
= __GLU_SWAP_4_BYTES(packedPixel
);
5873 uint
= *(const GLuint
*)packedPixel
;
5876 /* 00000000,00000000,00000000,11111111 == 0x000000ff */
5877 /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */
5878 /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */
5879 /* 11111111,00000000,00000000,00000000 == 0xff000000 */
5882 extractComponents
[0]= (float)((uint
& 0x000000FF) ) / 255.0;
5883 extractComponents
[1]= (float)((uint
& 0x0000FF00) >> 8) / 255.0;
5884 extractComponents
[2]= (float)((uint
& 0x00FF0000) >> 16) / 255.0;
5885 extractComponents
[3]= (float)((uint
& 0xFF000000) >> 24) / 255.0;
5886 } /* extract8888rev() */
5888 static void shove8888rev(const GLfloat shoveComponents
[],
5889 int index
,void *packedPixel
)
5891 /* 00000000,00000000,00000000,11111111 == 0x000000ff */
5892 /* 00000000,00000000,11111111,00000000 == 0x0000ff00 */
5893 /* 00000000,11111111,00000000,00000000 == 0x00ff0000 */
5894 /* 11111111,00000000,00000000,00000000 == 0xff000000 */
5896 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5897 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5898 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5899 assert(0.0 <= shoveComponents
[3] && shoveComponents
[3] <= 1.0);
5901 /* due to limited precision, need to round before shoving */
5902 ((GLuint
*)packedPixel
)[index
] =
5903 ((GLuint
)((shoveComponents
[0] * 255)+0.5) ) & 0x000000FF;
5904 ((GLuint
*)packedPixel
)[index
]|=
5905 ((GLuint
)((shoveComponents
[1] * 255)+0.5) << 8) & 0x0000FF00;
5906 ((GLuint
*)packedPixel
)[index
]|=
5907 ((GLuint
)((shoveComponents
[2] * 255)+0.5) << 16) & 0x00FF0000;
5908 ((GLuint
*)packedPixel
)[index
]|=
5909 ((GLuint
)((shoveComponents
[3] * 255)+0.5) << 24) & 0xFF000000;
5910 } /* shove8888rev() */
5912 static void extract1010102(int isSwap
,
5913 const void *packedPixel
,GLfloat extractComponents
[])
5918 uint
= __GLU_SWAP_4_BYTES(packedPixel
);
5921 uint
= *(const GLuint
*)packedPixel
;
5924 /* 11111111,11000000,00000000,00000000 == 0xffc00000 */
5925 /* 00000000,00111111,11110000,00000000 == 0x003ff000 */
5926 /* 00000000,00000000,00001111,11111100 == 0x00000ffc */
5927 /* 00000000,00000000,00000000,00000011 == 0x00000003 */
5930 extractComponents
[0]= (float)((uint
& 0xffc00000) >> 22) / 1023.0;
5931 extractComponents
[1]= (float)((uint
& 0x003ff000) >> 12) / 1023.0;
5932 extractComponents
[2]= (float)((uint
& 0x00000ffc) >> 2) / 1023.0;
5933 extractComponents
[3]= (float)((uint
& 0x00000003) ) / 3.0;
5934 } /* extract1010102() */
5936 static void shove1010102(const GLfloat shoveComponents
[],
5937 int index
,void *packedPixel
)
5939 /* 11111111,11000000,00000000,00000000 == 0xffc00000 */
5940 /* 00000000,00111111,11110000,00000000 == 0x003ff000 */
5941 /* 00000000,00000000,00001111,11111100 == 0x00000ffc */
5942 /* 00000000,00000000,00000000,00000011 == 0x00000003 */
5944 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5945 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5946 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5947 assert(0.0 <= shoveComponents
[3] && shoveComponents
[3] <= 1.0);
5949 /* due to limited precision, need to round before shoving */
5950 ((GLuint
*)packedPixel
)[index
] =
5951 ((GLuint
)((shoveComponents
[0] * 1023)+0.5) << 22) & 0xffc00000;
5952 ((GLuint
*)packedPixel
)[index
]|=
5953 ((GLuint
)((shoveComponents
[1] * 1023)+0.5) << 12) & 0x003ff000;
5954 ((GLuint
*)packedPixel
)[index
]|=
5955 ((GLuint
)((shoveComponents
[2] * 1023)+0.5) << 2) & 0x00000ffc;
5956 ((GLuint
*)packedPixel
)[index
]|=
5957 ((GLuint
)((shoveComponents
[3] * 3)+0.5) ) & 0x00000003;
5958 } /* shove1010102() */
5960 static void extract2101010rev(int isSwap
,
5961 const void *packedPixel
,
5962 GLfloat extractComponents
[])
5967 uint
= __GLU_SWAP_4_BYTES(packedPixel
);
5970 uint
= *(const GLuint
*)packedPixel
;
5973 /* 00000000,00000000,00000011,11111111 == 0x000003FF */
5974 /* 00000000,00001111,11111100,00000000 == 0x000FFC00 */
5975 /* 00111111,11110000,00000000,00000000 == 0x3FF00000 */
5976 /* 11000000,00000000,00000000,00000000 == 0xC0000000 */
5979 extractComponents
[0]= (float)((uint
& 0x000003FF) ) / 1023.0;
5980 extractComponents
[1]= (float)((uint
& 0x000FFC00) >> 10) / 1023.0;
5981 extractComponents
[2]= (float)((uint
& 0x3FF00000) >> 20) / 1023.0;
5982 extractComponents
[3]= (float)((uint
& 0xC0000000) >> 30) / 3.0;
5984 } /* extract2101010rev() */
5986 static void shove2101010rev(const GLfloat shoveComponents
[],
5987 int index
,void *packedPixel
)
5989 /* 00000000,00000000,00000011,11111111 == 0x000003FF */
5990 /* 00000000,00001111,11111100,00000000 == 0x000FFC00 */
5991 /* 00111111,11110000,00000000,00000000 == 0x3FF00000 */
5992 /* 11000000,00000000,00000000,00000000 == 0xC0000000 */
5994 assert(0.0 <= shoveComponents
[0] && shoveComponents
[0] <= 1.0);
5995 assert(0.0 <= shoveComponents
[1] && shoveComponents
[1] <= 1.0);
5996 assert(0.0 <= shoveComponents
[2] && shoveComponents
[2] <= 1.0);
5997 assert(0.0 <= shoveComponents
[3] && shoveComponents
[3] <= 1.0);
5999 /* due to limited precision, need to round before shoving */
6000 ((GLuint
*)packedPixel
)[index
] =
6001 ((GLuint
)((shoveComponents
[0] * 1023)+0.5) ) & 0x000003FF;
6002 ((GLuint
*)packedPixel
)[index
]|=
6003 ((GLuint
)((shoveComponents
[1] * 1023)+0.5) << 10) & 0x000FFC00;
6004 ((GLuint
*)packedPixel
)[index
]|=
6005 ((GLuint
)((shoveComponents
[2] * 1023)+0.5) << 20) & 0x3FF00000;
6006 ((GLuint
*)packedPixel
)[index
]|=
6007 ((GLuint
)((shoveComponents
[3] * 3)+0.5) << 30) & 0xC0000000;
6008 } /* shove2101010rev() */
6010 static void scaleInternalPackedPixel(int components
,
6011 void (*extractPackedPixel
)
6012 (int, const void *,GLfloat
[]),
6013 void (*shovePackedPixel
)
6014 (const GLfloat
[], int, void *),
6015 GLint widthIn
,GLint heightIn
,
6017 GLint widthOut
,GLint heightOut
,
6019 GLint pixelSizeInBytes
,
6020 GLint rowSizeInBytes
,GLint isSwap
)
6026 /* Max components in a format is 4, so... */
6028 float extractTotals
[4], extractMoreTotals
[4], shoveTotals
[4];
6033 const char *temp
, *temp0
;
6036 int lowx_int
, highx_int
, lowy_int
, highy_int
;
6037 float x_percent
, y_percent
;
6038 float lowx_float
, highx_float
, lowy_float
, highy_float
;
6039 float convy_float
, convx_float
;
6040 int convy_int
, convx_int
;
6042 const char *left
, *right
;
6044 if (widthIn
== widthOut
*2 && heightIn
== heightOut
*2) {
6045 halveImagePackedPixel(components
,extractPackedPixel
,shovePackedPixel
,
6046 widthIn
, heightIn
, dataIn
, dataOut
,
6047 pixelSizeInBytes
,rowSizeInBytes
,isSwap
);
6050 convy
= (float) heightIn
/heightOut
;
6051 convx
= (float) widthIn
/widthOut
;
6052 convy_int
= floor(convy
);
6053 convy_float
= convy
- convy_int
;
6054 convx_int
= floor(convx
);
6055 convx_float
= convx
- convx_int
;
6057 area
= convx
* convy
;
6061 highy_int
= convy_int
;
6062 highy_float
= convy_float
;
6064 for (i
= 0; i
< heightOut
; i
++) {
6067 highx_int
= convx_int
;
6068 highx_float
= convx_float
;
6070 for (j
= 0; j
< widthOut
; j
++) {
6072 ** Ok, now apply box filter to box that goes from (lowx, lowy)
6073 ** to (highx, highy) on input data into this pixel on output
6076 totals
[0] = totals
[1] = totals
[2] = totals
[3] = 0.0;
6078 /* calculate the value for pixels in the 1st row */
6079 xindex
= lowx_int
*pixelSizeInBytes
;
6080 if((highy_int
>lowy_int
) && (highx_int
>lowx_int
)) {
6082 y_percent
= 1-lowy_float
;
6083 temp
= (const char *)dataIn
+ xindex
+ lowy_int
* rowSizeInBytes
;
6084 percent
= y_percent
* (1-lowx_float
);
6086 for (k
= 0, temp_index
= temp
; k
< components
;
6087 k
++, temp_index
+= element_size
) {
6089 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
6091 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
6095 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6096 for (k
= 0; k
< components
; k
++) {
6097 totals
[k
]+= extractTotals
[k
] * percent
;
6101 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
6102 temp
+= pixelSizeInBytes
;
6104 for (k
= 0, temp_index
= temp
; k
< components
;
6105 k
++, temp_index
+= element_size
) {
6108 __GLU_SWAP_2_BYTES(temp_index
) * y_percent
;
6110 totals
[k
] += *(const GLushort
*)temp_index
* y_percent
;
6114 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6115 for (k
= 0; k
< components
; k
++) {
6116 totals
[k
]+= extractTotals
[k
] * y_percent
;
6120 temp
+= pixelSizeInBytes
;
6122 percent
= y_percent
* highx_float
;
6124 for (k
= 0, temp_index
= temp
; k
< components
;
6125 k
++, temp_index
+= element_size
) {
6127 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
6129 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
6133 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6134 for (k
= 0; k
< components
; k
++) {
6135 totals
[k
]+= extractTotals
[k
] * percent
;
6139 /* calculate the value for pixels in the last row */
6141 y_percent
= highy_float
;
6142 percent
= y_percent
* (1-lowx_float
);
6143 temp
= (const char *)dataIn
+ xindex
+ highy_int
* rowSizeInBytes
;
6145 for (k
= 0, temp_index
= temp
; k
< components
;
6146 k
++, temp_index
+= element_size
) {
6148 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
6150 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
6154 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6155 for (k
= 0; k
< components
; k
++) {
6156 totals
[k
]+= extractTotals
[k
] * percent
;
6159 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
6160 temp
+= pixelSizeInBytes
;
6162 for (k
= 0, temp_index
= temp
; k
< components
;
6163 k
++, temp_index
+= element_size
) {
6166 __GLU_SWAP_2_BYTES(temp_index
) * y_percent
;
6168 totals
[k
] += *(const GLushort
*)temp_index
* y_percent
;
6172 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6173 for (k
= 0; k
< components
; k
++) {
6174 totals
[k
]+= extractTotals
[k
] * y_percent
;
6179 temp
+= pixelSizeInBytes
;
6180 percent
= y_percent
* highx_float
;
6182 for (k
= 0, temp_index
= temp
; k
< components
;
6183 k
++, temp_index
+= element_size
) {
6185 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
6187 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
6191 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6192 for (k
= 0; k
< components
; k
++) {
6193 totals
[k
]+= extractTotals
[k
] * percent
;
6197 /* calculate the value for pixels in the 1st and last column */
6198 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
6199 left
+= rowSizeInBytes
;
6200 right
+= rowSizeInBytes
;
6202 for (k
= 0; k
< components
;
6203 k
++, left
+= element_size
, right
+= element_size
) {
6206 __GLU_SWAP_2_BYTES(left
) * (1-lowx_float
) +
6207 __GLU_SWAP_2_BYTES(right
) * highx_float
;
6209 totals
[k
] += *(const GLushort
*)left
* (1-lowx_float
)
6210 + *(const GLushort
*)right
* highx_float
;
6214 (*extractPackedPixel
)(isSwap
,left
,extractTotals
);
6215 (*extractPackedPixel
)(isSwap
,right
,extractMoreTotals
);
6216 for (k
= 0; k
< components
; k
++) {
6217 totals
[k
]+= (extractTotals
[k
]*(1-lowx_float
) +
6218 extractMoreTotals
[k
]*highx_float
);
6222 } else if (highy_int
> lowy_int
) {
6223 x_percent
= highx_float
- lowx_float
;
6224 percent
= (1-lowy_float
)*x_percent
;
6225 temp
= (const char *)dataIn
+ xindex
+ lowy_int
*rowSizeInBytes
;
6227 for (k
= 0, temp_index
= temp
; k
< components
;
6228 k
++, temp_index
+= element_size
) {
6230 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
6232 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
6236 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6237 for (k
= 0; k
< components
; k
++) {
6238 totals
[k
]+= extractTotals
[k
] * percent
;
6241 for(m
= lowy_int
+1; m
< highy_int
; m
++) {
6242 temp
+= rowSizeInBytes
;
6244 for (k
= 0, temp_index
= temp
; k
< components
;
6245 k
++, temp_index
+= element_size
) {
6248 __GLU_SWAP_2_BYTES(temp_index
) * x_percent
;
6250 totals
[k
] += *(const GLushort
*)temp_index
* x_percent
;
6254 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6255 for (k
= 0; k
< components
; k
++) {
6256 totals
[k
]+= extractTotals
[k
] * x_percent
;
6260 percent
= x_percent
* highy_float
;
6261 temp
+= rowSizeInBytes
;
6263 for (k
= 0, temp_index
= temp
; k
< components
;
6264 k
++, temp_index
+= element_size
) {
6266 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
6268 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
6272 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6273 for (k
= 0; k
< components
; k
++) {
6274 totals
[k
]+= extractTotals
[k
] * percent
;
6277 } else if (highx_int
> lowx_int
) {
6278 y_percent
= highy_float
- lowy_float
;
6279 percent
= (1-lowx_float
)*y_percent
;
6280 temp
= (const char *)dataIn
+ xindex
+ lowy_int
*rowSizeInBytes
;
6282 for (k
= 0, temp_index
= temp
; k
< components
;
6283 k
++, temp_index
+= element_size
) {
6285 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
6287 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
6291 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6292 for (k
= 0; k
< components
; k
++) {
6293 totals
[k
]+= extractTotals
[k
] * percent
;
6296 for (l
= lowx_int
+1; l
< highx_int
; l
++) {
6297 temp
+= pixelSizeInBytes
;
6299 for (k
= 0, temp_index
= temp
; k
< components
;
6300 k
++, temp_index
+= element_size
) {
6303 __GLU_SWAP_2_BYTES(temp_index
) * y_percent
;
6305 totals
[k
] += *(const GLushort
*)temp_index
* y_percent
;
6309 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6310 for (k
= 0; k
< components
; k
++) {
6311 totals
[k
]+= extractTotals
[k
] * y_percent
;
6315 temp
+= pixelSizeInBytes
;
6316 percent
= y_percent
* highx_float
;
6318 for (k
= 0, temp_index
= temp
; k
< components
;
6319 k
++, temp_index
+= element_size
) {
6321 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
6323 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
6327 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6328 for (k
= 0; k
< components
; k
++) {
6329 totals
[k
]+= extractTotals
[k
] * percent
;
6333 percent
= (highy_float
-lowy_float
)*(highx_float
-lowx_float
);
6334 temp
= (const char *)dataIn
+ xindex
+ lowy_int
* rowSizeInBytes
;
6336 for (k
= 0, temp_index
= temp
; k
< components
;
6337 k
++, temp_index
+= element_size
) {
6339 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
) * percent
;
6341 totals
[k
] += *(const GLushort
*)temp_index
* percent
;
6345 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6346 for (k
= 0; k
< components
; k
++) {
6347 totals
[k
]+= extractTotals
[k
] * percent
;
6352 /* this is for the pixels in the body */
6353 temp0
= (const char *)dataIn
+ xindex
+ pixelSizeInBytes
+ (lowy_int
+1)*rowSizeInBytes
;
6354 for (m
= lowy_int
+1; m
< highy_int
; m
++) {
6356 for(l
= lowx_int
+1; l
< highx_int
; l
++) {
6358 for (k
= 0, temp_index
= temp
; k
< components
;
6359 k
++, temp_index
+= element_size
) {
6361 totals
[k
] += __GLU_SWAP_2_BYTES(temp_index
);
6363 totals
[k
] += *(const GLushort
*)temp_index
;
6367 (*extractPackedPixel
)(isSwap
,temp
,extractTotals
);
6368 for (k
= 0; k
< components
; k
++) {
6369 totals
[k
]+= extractTotals
[k
];
6372 temp
+= pixelSizeInBytes
;
6374 temp0
+= rowSizeInBytes
;
6377 outindex
= (j
+ (i
* widthOut
)); /* * (components == 1) */
6379 for (k
= 0; k
< components
; k
++) {
6380 dataout
[outindex
+ k
] = totals
[k
]/area
;
6381 /*printf("totals[%d] = %f\n", k, totals[k]);*/
6384 for (k
= 0; k
< components
; k
++) {
6385 shoveTotals
[k
]= totals
[k
]/area
;
6387 (*shovePackedPixel
)(shoveTotals
,outindex
,(void *)dataOut
);
6389 lowx_int
= highx_int
;
6390 lowx_float
= highx_float
;
6391 highx_int
+= convx_int
;
6392 highx_float
+= convx_float
;
6393 if(highx_float
> 1) {
6398 lowy_int
= highy_int
;
6399 lowy_float
= highy_float
;
6400 highy_int
+= convy_int
;
6401 highy_float
+= convy_float
;
6402 if(highy_float
> 1) {
6408 assert(outindex
== (widthOut
*heightOut
- 1));
6409 } /* scaleInternalPackedPixel() */
6411 /* rowSizeInBytes is at least the width (in bytes) due to padding on
6412 * inputs; not always equal. Output NEVER has row padding.
6414 static void halveImagePackedPixel(int components
,
6415 void (*extractPackedPixel
)
6416 (int, const void *,GLfloat
[]),
6417 void (*shovePackedPixel
)
6418 (const GLfloat
[],int, void *),
6419 GLint width
, GLint height
,
6420 const void *dataIn
, void *dataOut
,
6421 GLint pixelSizeInBytes
,
6422 GLint rowSizeInBytes
, GLint isSwap
)
6424 /* handle case where there is only 1 column/row */
6425 if (width
== 1 || height
== 1) {
6426 assert(!(width
== 1 && height
== 1)); /* can't be 1x1 */
6427 halve1DimagePackedPixel(components
,extractPackedPixel
,shovePackedPixel
,
6428 width
,height
,dataIn
,dataOut
,pixelSizeInBytes
,
6429 rowSizeInBytes
,isSwap
);
6436 int halfWidth
= width
/ 2;
6437 int halfHeight
= height
/ 2;
6438 const char *src
= (const char *) dataIn
;
6439 int padBytes
= rowSizeInBytes
- (width
*pixelSizeInBytes
);
6442 for (ii
= 0; ii
< halfHeight
; ii
++) {
6443 for (jj
= 0; jj
< halfWidth
; jj
++) {
6445 float totals
[4]; /* 4 is maximum components */
6446 float extractTotals
[BOX4
][4]; /* 4 is maximum components */
6449 (*extractPackedPixel
)(isSwap
,src
,
6450 &extractTotals
[0][0]);
6451 (*extractPackedPixel
)(isSwap
,(src
+pixelSizeInBytes
),
6452 &extractTotals
[1][0]);
6453 (*extractPackedPixel
)(isSwap
,(src
+rowSizeInBytes
),
6454 &extractTotals
[2][0]);
6455 (*extractPackedPixel
)(isSwap
,
6456 (src
+rowSizeInBytes
+pixelSizeInBytes
),
6457 &extractTotals
[3][0]);
6458 for (cc
= 0; cc
< components
; cc
++) {
6461 /* grab 4 pixels to average */
6463 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
6464 * extractTotals[2][RED]+extractTotals[3][RED];
6465 * totals[RED]/= 4.0;
6467 for (kk
= 0; kk
< BOX4
; kk
++) {
6468 totals
[cc
]+= extractTotals
[kk
][cc
];
6470 totals
[cc
]/= (float)BOX4
;
6472 (*shovePackedPixel
)(totals
,outIndex
,dataOut
);
6475 /* skip over to next square of 4 */
6476 src
+= pixelSizeInBytes
+ pixelSizeInBytes
;
6478 /* skip past pad bytes, if any, to get to next row */
6481 /* src is at beginning of a row here, but it's the second row of
6482 * the square block of 4 pixels that we just worked on so we
6483 * need to go one more row.
6491 src
+= rowSizeInBytes
;
6494 /* both pointers must reach one byte after the end */
6495 assert(src
== &((const char *)dataIn
)[rowSizeInBytes
*height
]);
6496 assert(outIndex
== halfWidth
* halfHeight
);
6498 } /* halveImagePackedPixel() */
6500 static void halve1DimagePackedPixel(int components
,
6501 void (*extractPackedPixel
)
6502 (int, const void *,GLfloat
[]),
6503 void (*shovePackedPixel
)
6504 (const GLfloat
[],int, void *),
6505 GLint width
, GLint height
,
6506 const void *dataIn
, void *dataOut
,
6507 GLint pixelSizeInBytes
,
6508 GLint rowSizeInBytes
, GLint isSwap
)
6510 int halfWidth
= width
/ 2;
6511 int halfHeight
= height
/ 2;
6512 const char *src
= (const char *) dataIn
;
6515 assert(width
== 1 || height
== 1); /* must be 1D */
6516 assert(width
!= height
); /* can't be square */
6518 if (height
== 1) { /* 1 row */
6521 assert(width
!= 1); /* widthxheight can't be 1x1 */
6524 /* one horizontal row with possible pad bytes */
6526 for (jj
= 0; jj
< halfWidth
; jj
++) {
6528 float totals
[4]; /* 4 is maximum components */
6529 float extractTotals
[BOX2
][4]; /* 4 is maximum components */
6532 /* average two at a time, instead of four */
6533 (*extractPackedPixel
)(isSwap
,src
,
6534 &extractTotals
[0][0]);
6535 (*extractPackedPixel
)(isSwap
,(src
+pixelSizeInBytes
),
6536 &extractTotals
[1][0]);
6537 for (cc
= 0; cc
< components
; cc
++) {
6540 /* grab 2 pixels to average */
6542 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
6543 * totals[RED]/= 2.0;
6545 for (kk
= 0; kk
< BOX2
; kk
++) {
6546 totals
[cc
]+= extractTotals
[kk
][cc
];
6548 totals
[cc
]/= (float)BOX2
;
6550 (*shovePackedPixel
)(totals
,outIndex
,dataOut
);
6553 /* skip over to next group of 2 */
6554 src
+= pixelSizeInBytes
+ pixelSizeInBytes
;
6558 int padBytes
= rowSizeInBytes
- (width
*pixelSizeInBytes
);
6559 src
+= padBytes
; /* for assertion only */
6561 assert(src
== &((const char *)dataIn
)[rowSizeInBytes
]);
6562 assert(outIndex
== halfWidth
* halfHeight
);
6564 else if (width
== 1) { /* 1 column */
6567 assert(height
!= 1); /* widthxheight can't be 1x1 */
6569 /* one vertical column with possible pad bytes per row */
6570 /* average two at a time */
6572 for (jj
= 0; jj
< halfHeight
; jj
++) {
6574 float totals
[4]; /* 4 is maximum components */
6575 float extractTotals
[BOX2
][4]; /* 4 is maximum components */
6578 /* average two at a time, instead of four */
6579 (*extractPackedPixel
)(isSwap
,src
,
6580 &extractTotals
[0][0]);
6581 (*extractPackedPixel
)(isSwap
,(src
+rowSizeInBytes
),
6582 &extractTotals
[1][0]);
6583 for (cc
= 0; cc
< components
; cc
++) {
6586 /* grab 2 pixels to average */
6588 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
6589 * totals[RED]/= 2.0;
6591 for (kk
= 0; kk
< BOX2
; kk
++) {
6592 totals
[cc
]+= extractTotals
[kk
][cc
];
6594 totals
[cc
]/= (float)BOX2
;
6596 (*shovePackedPixel
)(totals
,outIndex
,dataOut
);
6599 src
+= rowSizeInBytes
+ rowSizeInBytes
; /* go to row after next */
6602 assert(src
== &((const char *)dataIn
)[rowSizeInBytes
*height
]);
6603 assert(outIndex
== halfWidth
* halfHeight
);
6605 } /* halve1DimagePackedPixel() */
6607 /*===========================================================================*/
6609 #ifdef RESOLVE_3D_TEXTURE_SUPPORT
6611 * This section ensures that GLU 1.3 will load and run on
6612 * a GL 1.1 implementation. It dynamically resolves the
6613 * call to glTexImage3D() which might not be available.
6614 * Or is it might be supported as an extension.
6615 * Contributed by Gerk Huisma <gerk@five-d.demon.nl>.
6618 typedef void (GLAPIENTRY
*TexImage3Dproc
)( GLenum target
, GLint level
,
6619 GLenum internalFormat
,
6620 GLsizei width
, GLsizei height
,
6621 GLsizei depth
, GLint border
,
6622 GLenum format
, GLenum type
,
6623 const GLvoid
*pixels
);
6625 static TexImage3Dproc pTexImage3D
= 0;
6627 #if !defined(_WIN32) && !defined(__WIN32__)
6629 # include <sys/types.h>
6631 WINGDIAPI PROC WINAPI
wglGetProcAddress(LPCSTR
);
6634 static void gluTexImage3D( GLenum target
, GLint level
,
6635 GLenum internalFormat
,
6636 GLsizei width
, GLsizei height
,
6637 GLsizei depth
, GLint border
,
6638 GLenum format
, GLenum type
,
6639 const GLvoid
*pixels
)
6642 #if defined(_WIN32) || defined(__WIN32__)
6643 pTexImage3D
= (TexImage3Dproc
) wglGetProcAddress("glTexImage3D");
6645 pTexImage3D
= (TexImage3Dproc
) wglGetProcAddress("glTexImage3DEXT");
6647 void *libHandle
= dlopen("libgl.so", RTLD_LAZY
);
6648 pTexImage3D
= TexImage3Dproc
) dlsym(libHandle
, "glTexImage3D" );
6650 pTexImage3D
= (TexImage3Dproc
) dlsym(libHandle
,"glTexImage3DEXT");
6655 /* Now call glTexImage3D */
6657 pTexImage3D(target
, level
, internalFormat
, width
, height
,
6658 depth
, border
, format
, type
, pixels
);
6663 /* Only bind to a GL 1.2 implementation: */
6664 #define gluTexImage3D glTexImage3D
6668 static GLint
imageSize3D(GLint width
, GLint height
, GLint depth
,
6669 GLenum format
, GLenum type
)
6671 int components
= elements_per_group(format
,type
);
6672 int bytes_per_row
= bytes_per_element(type
) * width
;
6674 assert(width
> 0 && height
> 0 && depth
> 0);
6675 assert(type
!= GL_BITMAP
);
6677 return bytes_per_row
* height
* depth
* components
;
6678 } /* imageSize3D() */
6680 static void fillImage3D(const PixelStorageModes
*psm
,
6681 GLint width
, GLint height
, GLint depth
, GLenum format
,
6682 GLenum type
, GLboolean indexFormat
,
6683 const void *userImage
, GLushort
*newImage
)
6692 int elementsPerLine
;
6695 const GLubyte
*start
, *rowStart
, *iter
;
6699 myswapBytes
= psm
->unpack_swap_bytes
;
6700 components
= elements_per_group(format
,type
);
6701 if (psm
->unpack_row_length
> 0) {
6702 groupsPerLine
= psm
->unpack_row_length
;
6705 groupsPerLine
= width
;
6707 elementSize
= bytes_per_element(type
);
6708 groupSize
= elementSize
* components
;
6709 if (elementSize
== 1) myswapBytes
= 0;
6712 if (psm
->unpack_image_height
> 0) {
6713 rowsPerImage
= psm
->unpack_image_height
;
6716 rowsPerImage
= height
;
6720 rowSize
= groupsPerLine
* groupSize
;
6721 padding
= rowSize
% psm
->unpack_alignment
;
6723 rowSize
+= psm
->unpack_alignment
- padding
;
6726 imageSize
= rowsPerImage
* rowSize
; /* 3dstuff */
6728 start
= (const GLubyte
*)userImage
+ psm
->unpack_skip_rows
* rowSize
+
6729 psm
->unpack_skip_pixels
* groupSize
+
6731 psm
->unpack_skip_images
* imageSize
;
6732 elementsPerLine
= width
* components
;
6735 for (dd
= 0; dd
< depth
; dd
++) {
6738 for (hh
= 0; hh
< height
; hh
++) {
6741 for (ww
= 0; ww
< elementsPerLine
; ww
++) {
6743 float extractComponents
[4];
6746 case GL_UNSIGNED_BYTE
:
6750 *iter2
++ = (*iter
) * 257;
6755 *iter2
++ = *((const GLbyte
*) iter
);
6758 *iter2
++ = (*((const GLbyte
*) iter
)) * 516;
6761 case GL_UNSIGNED_BYTE_3_3_2
:
6762 extract332(0,iter
,extractComponents
);
6763 for (k
= 0; k
< 3; k
++) {
6764 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6767 case GL_UNSIGNED_BYTE_2_3_3_REV
:
6768 extract233rev(0,iter
,extractComponents
);
6769 for (k
= 0; k
< 3; k
++) {
6770 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6773 case GL_UNSIGNED_SHORT_5_6_5
:
6774 extract565(myswapBytes
,iter
,extractComponents
);
6775 for (k
= 0; k
< 3; k
++) {
6776 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6779 case GL_UNSIGNED_SHORT_5_6_5_REV
:
6780 extract565rev(myswapBytes
,iter
,extractComponents
);
6781 for (k
= 0; k
< 3; k
++) {
6782 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6785 case GL_UNSIGNED_SHORT_4_4_4_4
:
6786 extract4444(myswapBytes
,iter
,extractComponents
);
6787 for (k
= 0; k
< 4; k
++) {
6788 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6791 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
6792 extract4444rev(myswapBytes
,iter
,extractComponents
);
6793 for (k
= 0; k
< 4; k
++) {
6794 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6797 case GL_UNSIGNED_SHORT_5_5_5_1
:
6798 extract5551(myswapBytes
,iter
,extractComponents
);
6799 for (k
= 0; k
< 4; k
++) {
6800 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6803 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
6804 extract1555rev(myswapBytes
,iter
,extractComponents
);
6805 for (k
= 0; k
< 4; k
++) {
6806 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6809 case GL_UNSIGNED_SHORT
:
6812 widget
.ub
[0] = iter
[1];
6813 widget
.ub
[1] = iter
[0];
6815 widget
.ub
[0] = iter
[0];
6816 widget
.ub
[1] = iter
[1];
6818 if (type
== GL_SHORT
) {
6820 *iter2
++ = widget
.s
[0];
6823 *iter2
++ = widget
.s
[0]*2;
6826 *iter2
++ = widget
.us
[0];
6829 case GL_UNSIGNED_INT_8_8_8_8
:
6830 extract8888(myswapBytes
,iter
,extractComponents
);
6831 for (k
= 0; k
< 4; k
++) {
6832 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6835 case GL_UNSIGNED_INT_8_8_8_8_REV
:
6836 extract8888rev(myswapBytes
,iter
,extractComponents
);
6837 for (k
= 0; k
< 4; k
++) {
6838 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6841 case GL_UNSIGNED_INT_10_10_10_2
:
6842 extract1010102(myswapBytes
,iter
,extractComponents
);
6843 for (k
= 0; k
< 4; k
++) {
6844 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6847 case GL_UNSIGNED_INT_2_10_10_10_REV
:
6848 extract2101010rev(myswapBytes
,iter
,extractComponents
);
6849 for (k
= 0; k
< 4; k
++) {
6850 *iter2
++ = (GLushort
)(extractComponents
[k
]*65535);
6854 case GL_UNSIGNED_INT
:
6857 widget
.ub
[0] = iter
[3];
6858 widget
.ub
[1] = iter
[2];
6859 widget
.ub
[2] = iter
[1];
6860 widget
.ub
[3] = iter
[0];
6862 widget
.ub
[0] = iter
[0];
6863 widget
.ub
[1] = iter
[1];
6864 widget
.ub
[2] = iter
[2];
6865 widget
.ub
[3] = iter
[3];
6867 if (type
== GL_FLOAT
) {
6869 *iter2
++ = widget
.f
;
6871 *iter2
++ = 65535 * widget
.f
;
6873 } else if (type
== GL_UNSIGNED_INT
) {
6875 *iter2
++ = widget
.ui
;
6877 *iter2
++ = widget
.ui
>> 16;
6881 *iter2
++ = widget
.i
;
6883 *iter2
++ = widget
.i
>> 15;
6895 iter
= rowStart
; /* for assertion purposes */
6901 /* iterators should be one byte past end */
6902 if (!isTypePackedPixel(type
)) {
6903 assert(iter2
== &newImage
[width
*height
*depth
*components
]);
6906 assert(iter2
== &newImage
[width
*height
*depth
*
6907 elements_per_group(format
,0)]);
6909 assert( iter
== &((const GLubyte
*)userImage
)[rowSize
*height
*depth
+
6910 psm
->unpack_skip_rows
* rowSize
+
6911 psm
->unpack_skip_pixels
* groupSize
+
6913 psm
->unpack_skip_images
* imageSize
] );
6914 } /* fillImage3D () */
6916 static void scaleInternal3D(GLint components
,
6917 GLint widthIn
, GLint heightIn
, GLint depthIn
,
6918 const GLushort
*dataIn
,
6919 GLint widthOut
, GLint heightOut
, GLint depthOut
,
6922 float x
, lowx
, highx
, convx
, halfconvx
;
6923 float y
, lowy
, highy
, convy
, halfconvy
;
6924 float z
, lowz
, highz
, convz
, halfconvz
;
6925 float xpercent
,ypercent
,zpercent
;
6927 /* Max components in a format is 4, so... */
6930 int i
,j
,d
,k
,zint
,yint
,xint
,xindex
,yindex
,zindex
;
6933 convz
= (float) depthIn
/depthOut
;
6934 convy
= (float) heightIn
/heightOut
;
6935 convx
= (float) widthIn
/widthOut
;
6936 halfconvx
= convx
/2;
6937 halfconvy
= convy
/2;
6938 halfconvz
= convz
/2;
6939 for (d
= 0; d
< depthOut
; d
++) {
6940 z
= convz
* (d
+0.5);
6941 if (depthIn
> depthOut
) {
6942 highz
= z
+ halfconvz
;
6943 lowz
= z
- halfconvz
;
6948 for (i
= 0; i
< heightOut
; i
++) {
6949 y
= convy
* (i
+0.5);
6950 if (heightIn
> heightOut
) {
6951 highy
= y
+ halfconvy
;
6952 lowy
= y
- halfconvy
;
6957 for (j
= 0; j
< widthOut
; j
++) {
6958 x
= convx
* (j
+0.5);
6959 if (widthIn
> widthOut
) {
6960 highx
= x
+ halfconvx
;
6961 lowx
= x
- halfconvx
;
6968 ** Ok, now apply box filter to box that goes from (lowx, lowy,
6969 ** lowz) to (highx, highy, highz) on input data into this pixel
6972 totals
[0] = totals
[1] = totals
[2] = totals
[3] = 0.0;
6978 zindex
= (zint
+ depthIn
) % depthIn
;
6979 if (highz
< zint
+1) {
6980 zpercent
= highz
- z
;
6982 zpercent
= zint
+1 - z
;
6988 yindex
= (yint
+ heightIn
) % heightIn
;
6989 if (highy
< yint
+1) {
6990 ypercent
= highy
- y
;
6992 ypercent
= yint
+1 - y
;
6999 xindex
= (xint
+ widthIn
) % widthIn
;
7000 if (highx
< xint
+1) {
7001 xpercent
= highx
- x
;
7003 xpercent
= xint
+1 - x
;
7006 percent
= xpercent
* ypercent
* zpercent
;
7009 temp
= (xindex
+ (yindex
*widthIn
) +
7010 (zindex
*widthIn
*heightIn
)) * components
;
7011 for (k
= 0; k
< components
; k
++) {
7012 assert(0 <= (temp
+k
) &&
7014 (widthIn
*heightIn
*depthIn
*components
));
7015 totals
[k
] += dataIn
[temp
+ k
] * percent
;
7030 temp
= (j
+ (i
* widthOut
) +
7031 (d
*widthOut
*heightOut
)) * components
;
7032 for (k
= 0; k
< components
; k
++) {
7033 /* totals[] should be rounded in the case of enlarging an
7034 * RGB ramp when the type is 332 or 4444
7036 assert(0 <= (temp
+k
) &&
7037 (temp
+k
) < (widthOut
*heightOut
*depthOut
*components
));
7038 dataOut
[temp
+ k
] = (totals
[k
]+0.5)/volume
;
7043 } /* scaleInternal3D() */
7045 static void emptyImage3D(const PixelStorageModes
*psm
,
7046 GLint width
, GLint height
, GLint depth
,
7047 GLenum format
, GLenum type
, GLboolean indexFormat
,
7048 const GLushort
*oldImage
, void *userImage
)
7057 GLubyte
*start
, *rowStart
, *iter
;
7058 int elementsPerLine
;
7059 const GLushort
*iter2
;
7064 myswapBytes
= psm
->pack_swap_bytes
;
7065 components
= elements_per_group(format
,type
);
7066 if (psm
->pack_row_length
> 0) {
7067 groupsPerLine
= psm
->pack_row_length
;
7070 groupsPerLine
= width
;
7073 elementSize
= bytes_per_element(type
);
7074 groupSize
= elementSize
* components
;
7075 if (elementSize
== 1) myswapBytes
= 0;
7078 if (psm
->pack_image_height
> 0) {
7079 rowsPerImage
= psm
->pack_image_height
;
7082 rowsPerImage
= height
;
7087 rowSize
= groupsPerLine
* groupSize
;
7088 padding
= rowSize
% psm
->pack_alignment
;
7090 rowSize
+= psm
->pack_alignment
- padding
;
7093 imageSize
= rowsPerImage
* rowSize
; /* 3dstuff */
7095 start
= (GLubyte
*)userImage
+ psm
->pack_skip_rows
* rowSize
+
7096 psm
->pack_skip_pixels
* groupSize
+
7098 psm
->pack_skip_images
* imageSize
;
7099 elementsPerLine
= width
* components
;
7102 for (dd
= 0; dd
< depth
; dd
++) {
7105 for (ii
= 0; ii
< height
; ii
++) {
7108 for (jj
= 0; jj
< elementsPerLine
; jj
++) {
7110 float shoveComponents
[4];
7113 case GL_UNSIGNED_BYTE
:
7117 *iter
= *iter2
++ >> 8;
7122 *((GLbyte
*) iter
) = *iter2
++;
7124 *((GLbyte
*) iter
) = *iter2
++ >> 9;
7127 case GL_UNSIGNED_BYTE_3_3_2
:
7128 for (k
= 0; k
< 3; k
++) {
7129 shoveComponents
[k
]= *iter2
++ / 65535.0;
7131 shove332(shoveComponents
,0,(void *)iter
);
7133 case GL_UNSIGNED_BYTE_2_3_3_REV
:
7134 for (k
= 0; k
< 3; k
++) {
7135 shoveComponents
[k
]= *iter2
++ / 65535.0;
7137 shove233rev(shoveComponents
,0,(void *)iter
);
7139 case GL_UNSIGNED_SHORT_5_6_5
:
7140 for (k
= 0; k
< 3; k
++) {
7141 shoveComponents
[k
]= *iter2
++ / 65535.0;
7143 shove565(shoveComponents
,0,(void *)&widget
.us
[0]);
7145 iter
[0] = widget
.ub
[1];
7146 iter
[1] = widget
.ub
[0];
7149 *(GLushort
*)iter
= widget
.us
[0];
7152 case GL_UNSIGNED_SHORT_5_6_5_REV
:
7153 for (k
= 0; k
< 3; k
++) {
7154 shoveComponents
[k
]= *iter2
++ / 65535.0;
7156 shove565rev(shoveComponents
,0,(void *)&widget
.us
[0]);
7158 iter
[0] = widget
.ub
[1];
7159 iter
[1] = widget
.ub
[0];
7162 *(GLushort
*)iter
= widget
.us
[0];
7165 case GL_UNSIGNED_SHORT_4_4_4_4
:
7166 for (k
= 0; k
< 4; k
++) {
7167 shoveComponents
[k
]= *iter2
++ / 65535.0;
7169 shove4444(shoveComponents
,0,(void *)&widget
.us
[0]);
7171 iter
[0] = widget
.ub
[1];
7172 iter
[1] = widget
.ub
[0];
7174 *(GLushort
*)iter
= widget
.us
[0];
7177 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
7178 for (k
= 0; k
< 4; k
++) {
7179 shoveComponents
[k
]= *iter2
++ / 65535.0;
7181 shove4444rev(shoveComponents
,0,(void *)&widget
.us
[0]);
7183 iter
[0] = widget
.ub
[1];
7184 iter
[1] = widget
.ub
[0];
7186 *(GLushort
*)iter
= widget
.us
[0];
7189 case GL_UNSIGNED_SHORT_5_5_5_1
:
7190 for (k
= 0; k
< 4; k
++) {
7191 shoveComponents
[k
]= *iter2
++ / 65535.0;
7193 shove5551(shoveComponents
,0,(void *)&widget
.us
[0]);
7195 iter
[0] = widget
.ub
[1];
7196 iter
[1] = widget
.ub
[0];
7198 *(GLushort
*)iter
= widget
.us
[0];
7201 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
7202 for (k
= 0; k
< 4; k
++) {
7203 shoveComponents
[k
]= *iter2
++ / 65535.0;
7205 shove1555rev(shoveComponents
,0,(void *)&widget
.us
[0]);
7207 iter
[0] = widget
.ub
[1];
7208 iter
[1] = widget
.ub
[0];
7210 *(GLushort
*)iter
= widget
.us
[0];
7213 case GL_UNSIGNED_SHORT
:
7215 if (type
== GL_SHORT
) {
7217 widget
.s
[0] = *iter2
++;
7219 widget
.s
[0] = *iter2
++ >> 1;
7222 widget
.us
[0] = *iter2
++;
7225 iter
[0] = widget
.ub
[1];
7226 iter
[1] = widget
.ub
[0];
7228 iter
[0] = widget
.ub
[0];
7229 iter
[1] = widget
.ub
[1];
7232 case GL_UNSIGNED_INT_8_8_8_8
:
7233 for (k
= 0; k
< 4; k
++) {
7234 shoveComponents
[k
]= *iter2
++ / 65535.0;
7236 shove8888(shoveComponents
,0,(void *)&widget
.ui
);
7238 iter
[3] = widget
.ub
[0];
7239 iter
[2] = widget
.ub
[1];
7240 iter
[1] = widget
.ub
[2];
7241 iter
[0] = widget
.ub
[3];
7243 *(GLuint
*)iter
= widget
.ui
;
7246 case GL_UNSIGNED_INT_8_8_8_8_REV
:
7247 for (k
= 0; k
< 4; k
++) {
7248 shoveComponents
[k
]= *iter2
++ / 65535.0;
7250 shove8888rev(shoveComponents
,0,(void *)&widget
.ui
);
7252 iter
[3] = widget
.ub
[0];
7253 iter
[2] = widget
.ub
[1];
7254 iter
[1] = widget
.ub
[2];
7255 iter
[0] = widget
.ub
[3];
7257 *(GLuint
*)iter
= widget
.ui
;
7260 case GL_UNSIGNED_INT_10_10_10_2
:
7261 for (k
= 0; k
< 4; k
++) {
7262 shoveComponents
[k
]= *iter2
++ / 65535.0;
7264 shove1010102(shoveComponents
,0,(void *)&widget
.ui
);
7266 iter
[3] = widget
.ub
[0];
7267 iter
[2] = widget
.ub
[1];
7268 iter
[1] = widget
.ub
[2];
7269 iter
[0] = widget
.ub
[3];
7271 *(GLuint
*)iter
= widget
.ui
;
7274 case GL_UNSIGNED_INT_2_10_10_10_REV
:
7275 for (k
= 0; k
< 4; k
++) {
7276 shoveComponents
[k
]= *iter2
++ / 65535.0;
7278 shove2101010rev(shoveComponents
,0,(void *)&widget
.ui
);
7280 iter
[3] = widget
.ub
[0];
7281 iter
[2] = widget
.ub
[1];
7282 iter
[1] = widget
.ub
[2];
7283 iter
[0] = widget
.ub
[3];
7285 *(GLuint
*)iter
= widget
.ui
;
7289 case GL_UNSIGNED_INT
:
7291 if (type
== GL_FLOAT
) {
7293 widget
.f
= *iter2
++;
7295 widget
.f
= *iter2
++ / (float) 65535.0;
7297 } else if (type
== GL_UNSIGNED_INT
) {
7299 widget
.ui
= *iter2
++;
7301 widget
.ui
= (unsigned int) *iter2
++ * 65537;
7305 widget
.i
= *iter2
++;
7307 widget
.i
= ((unsigned int) *iter2
++ * 65537)/2;
7311 iter
[3] = widget
.ub
[0];
7312 iter
[2] = widget
.ub
[1];
7313 iter
[1] = widget
.ub
[2];
7314 iter
[0] = widget
.ub
[3];
7316 iter
[0] = widget
.ub
[0];
7317 iter
[1] = widget
.ub
[1];
7318 iter
[2] = widget
.ub
[2];
7319 iter
[3] = widget
.ub
[3];
7335 /* iterators should be one byte past end */
7336 if (!isTypePackedPixel(type
)) {
7337 assert(iter2
== &oldImage
[width
*height
*depth
*components
]);
7340 assert(iter2
== &oldImage
[width
*height
*depth
*
7341 elements_per_group(format
,0)]);
7343 assert( iter
== &((GLubyte
*)userImage
)[rowSize
*height
*depth
+
7344 psm
->unpack_skip_rows
* rowSize
+
7345 psm
->unpack_skip_pixels
* groupSize
+
7347 psm
->unpack_skip_images
* imageSize
] );
7348 } /* emptyImage3D() */
7351 int gluScaleImage3D(GLenum format
,
7352 GLint widthIn
, GLint heightIn
, GLint depthIn
,
7353 GLenum typeIn
, const void *dataIn
,
7354 GLint widthOut
, GLint heightOut
, GLint depthOut
,
7355 GLenum typeOut
, void *dataOut
)
7358 GLushort
*beforeImage
, *afterImage
;
7359 PixelStorageModes psm
;
7361 if (widthIn
== 0 || heightIn
== 0 || depthIn
== 0 ||
7362 widthOut
== 0 || heightOut
== 0 || depthOut
== 0) {
7366 if (widthIn
< 0 || heightIn
< 0 || depthIn
< 0 ||
7367 widthOut
< 0 || heightOut
< 0 || depthOut
< 0) {
7368 return GLU_INVALID_VALUE
;
7371 if (!legalFormat(format
) || !legalType(typeIn
) || !legalType(typeOut
) ||
7372 typeIn
== GL_BITMAP
|| typeOut
== GL_BITMAP
) {
7373 return GLU_INVALID_ENUM
;
7375 if (!isLegalFormatForPackedPixelType(format
, typeIn
)) {
7376 return GLU_INVALID_OPERATION
;
7378 if (!isLegalFormatForPackedPixelType(format
, typeOut
)) {
7379 return GLU_INVALID_OPERATION
;
7382 beforeImage
= malloc(imageSize3D(widthIn
, heightIn
, depthIn
, format
,
7383 GL_UNSIGNED_SHORT
));
7384 afterImage
= malloc(imageSize3D(widthOut
, heightOut
, depthOut
, format
,
7385 GL_UNSIGNED_SHORT
));
7386 if (beforeImage
== NULL
|| afterImage
== NULL
) {
7389 return GLU_OUT_OF_MEMORY
;
7391 retrieveStoreModes3D(&psm
);
7393 fillImage3D(&psm
,widthIn
,heightIn
,depthIn
,format
,typeIn
, is_index(format
),
7394 dataIn
, beforeImage
);
7395 components
= elements_per_group(format
,0);
7396 scaleInternal3D(components
,widthIn
,heightIn
,depthIn
,beforeImage
,
7397 widthOut
,heightOut
,depthOut
,afterImage
);
7398 emptyImage3D(&psm
,widthOut
,heightOut
,depthOut
,format
,typeOut
,
7399 is_index(format
),afterImage
, dataOut
);
7400 free((void *) beforeImage
);
7401 free((void *) afterImage
);
7404 } /* gluScaleImage3D() */
7407 static void closestFit3D(GLenum target
, GLint width
, GLint height
, GLint depth
,
7408 GLint internalFormat
, GLenum format
, GLenum type
,
7409 GLint
*newWidth
, GLint
*newHeight
, GLint
*newDepth
)
7411 GLint widthPowerOf2
= nearestPower(width
);
7412 GLint heightPowerOf2
= nearestPower(height
);
7413 GLint depthPowerOf2
= nearestPower(depth
);
7417 /* compute level 1 width & height & depth, clamping each at 1 */
7418 GLint widthAtLevelOne
= (widthPowerOf2
> 1) ?
7419 widthPowerOf2
>> 1 :
7421 GLint heightAtLevelOne
= (heightPowerOf2
> 1) ?
7422 heightPowerOf2
>> 1 :
7424 GLint depthAtLevelOne
= (depthPowerOf2
> 1) ?
7425 depthPowerOf2
>> 1 :
7427 GLenum proxyTarget
= GL_PROXY_TEXTURE_3D
;
7428 assert(widthAtLevelOne
> 0);
7429 assert(heightAtLevelOne
> 0);
7430 assert(depthAtLevelOne
> 0);
7432 /* does width x height x depth at level 1 & all their mipmaps fit? */
7433 assert(target
== GL_TEXTURE_3D
|| target
== GL_PROXY_TEXTURE_3D
);
7434 gluTexImage3D(proxyTarget
, 1, /* must be non-zero */
7436 widthAtLevelOne
,heightAtLevelOne
,depthAtLevelOne
,
7437 0,format
,type
,NULL
);
7438 glGetTexLevelParameteriv(proxyTarget
, 1,GL_TEXTURE_WIDTH
,&proxyWidth
);
7439 /* does it fit??? */
7440 if (proxyWidth
== 0) { /* nope, so try again with these sizes */
7441 if (widthPowerOf2
== 1 && heightPowerOf2
== 1 &&
7442 depthPowerOf2
== 1) {
7443 *newWidth
= *newHeight
= *newDepth
= 1; /* must fit 1x1x1 texture */
7446 widthPowerOf2
= widthAtLevelOne
;
7447 heightPowerOf2
= heightAtLevelOne
;
7448 depthPowerOf2
= depthAtLevelOne
;
7450 /* else it does fit */
7451 } while (proxyWidth
== 0);
7452 /* loop must terminate! */
7454 /* return the width & height at level 0 that fits */
7455 *newWidth
= widthPowerOf2
;
7456 *newHeight
= heightPowerOf2
;
7457 *newDepth
= depthPowerOf2
;
7458 /*printf("Proxy Textures\n");*/
7459 } /* closestFit3D() */
7461 static void halveImagePackedPixelSlice(int components
,
7462 void (*extractPackedPixel
)
7463 (int, const void *,GLfloat
[]),
7464 void (*shovePackedPixel
)
7465 (const GLfloat
[],int, void *),
7466 GLint width
, GLint height
, GLint depth
,
7467 const void *dataIn
, void *dataOut
,
7468 GLint pixelSizeInBytes
,
7469 GLint rowSizeInBytes
,
7470 GLint imageSizeInBytes
,
7474 int halfWidth
= width
/ 2;
7475 int halfHeight
= height
/ 2;
7476 int halfDepth
= depth
/ 2;
7477 const char *src
= (const char *)dataIn
;
7480 assert((width
== 1 || height
== 1) && depth
>= 2);
7482 if (width
== height
) { /* a 1-pixel column viewed from top */
7483 assert(width
== 1 && height
== 1);
7486 for (ii
= 0; ii
< halfDepth
; ii
++) {
7488 float extractTotals
[BOX2
][4];
7491 (*extractPackedPixel
)(isSwap
,src
,&extractTotals
[0][0]);
7492 (*extractPackedPixel
)(isSwap
,(src
+imageSizeInBytes
),
7493 &extractTotals
[1][0]);
7494 for (cc
= 0; cc
< components
; cc
++) {
7497 /* average 2 pixels since only a column */
7499 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
7500 * totals[RED]/= 2.0;
7502 for (kk
= 0; kk
< BOX2
; kk
++) {
7503 totals
[cc
]+= extractTotals
[kk
][cc
];
7505 totals
[cc
]/= (float)BOX2
;
7508 (*shovePackedPixel
)(totals
,outIndex
,dataOut
);
7510 /* skip over to next group of 2 */
7511 src
+= imageSizeInBytes
+ imageSizeInBytes
;
7514 else if (height
== 1) { /* horizontal slice viewed from top */
7517 for (ii
= 0; ii
< halfDepth
; ii
++) {
7518 for (jj
= 0; jj
< halfWidth
; jj
++) {
7520 float extractTotals
[BOX4
][4];
7523 (*extractPackedPixel
)(isSwap
,src
,
7524 &extractTotals
[0][0]);
7525 (*extractPackedPixel
)(isSwap
,(src
+pixelSizeInBytes
),
7526 &extractTotals
[1][0]);
7527 (*extractPackedPixel
)(isSwap
,(src
+imageSizeInBytes
),
7528 &extractTotals
[2][0]);
7529 (*extractPackedPixel
)(isSwap
,
7530 (src
+imageSizeInBytes
+pixelSizeInBytes
),
7531 &extractTotals
[3][0]);
7532 for (cc
= 0; cc
< components
; cc
++) {
7535 /* grab 4 pixels to average */
7537 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
7538 * extractTotals[2][RED]+extractTotals[3][RED];
7539 * totals[RED]/= 4.0;
7541 for (kk
= 0; kk
< BOX4
; kk
++) {
7542 totals
[cc
]+= extractTotals
[kk
][cc
];
7544 totals
[cc
]/= (float)BOX4
;
7546 (*shovePackedPixel
)(totals
,outIndex
,dataOut
);
7549 /* skip over to next horizontal square of 4 */
7550 src
+= imageSizeInBytes
+ imageSizeInBytes
;
7556 else if (width
== 1) { /* vertical slice viewed from top */
7557 assert(height
!= 1);
7559 for (ii
= 0; ii
< halfDepth
; ii
++) {
7560 for (jj
= 0; jj
< halfHeight
; jj
++) {
7562 float extractTotals
[BOX4
][4];
7565 (*extractPackedPixel
)(isSwap
,src
,
7566 &extractTotals
[0][0]);
7567 (*extractPackedPixel
)(isSwap
,(src
+rowSizeInBytes
),
7568 &extractTotals
[1][0]);
7569 (*extractPackedPixel
)(isSwap
,(src
+imageSizeInBytes
),
7570 &extractTotals
[2][0]);
7571 (*extractPackedPixel
)(isSwap
,
7572 (src
+imageSizeInBytes
+rowSizeInBytes
),
7573 &extractTotals
[3][0]);
7574 for (cc
= 0; cc
< components
; cc
++) {
7577 /* grab 4 pixels to average */
7579 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
7580 * extractTotals[2][RED]+extractTotals[3][RED];
7581 * totals[RED]/= 4.0;
7583 for (kk
= 0; kk
< BOX4
; kk
++) {
7584 totals
[cc
]+= extractTotals
[kk
][cc
];
7586 totals
[cc
]/= (float)BOX4
;
7588 (*shovePackedPixel
)(totals
,outIndex
,dataOut
);
7592 /* skip over to next vertical square of 4 */
7593 src
+= imageSizeInBytes
+ imageSizeInBytes
;
7599 } /* halveImagePackedPixelSlice() */
7601 static void halveImagePackedPixel3D(int components
,
7602 void (*extractPackedPixel
)
7603 (int, const void *,GLfloat
[]),
7604 void (*shovePackedPixel
)
7605 (const GLfloat
[],int, void *),
7606 GLint width
, GLint height
, GLint depth
,
7607 const void *dataIn
, void *dataOut
,
7608 GLint pixelSizeInBytes
,
7609 GLint rowSizeInBytes
,
7610 GLint imageSizeInBytes
,
7614 assert(1 <= width
&& 1 <= height
);
7616 halveImagePackedPixel(components
,extractPackedPixel
,shovePackedPixel
,
7617 width
,height
,dataIn
,dataOut
,pixelSizeInBytes
,
7618 rowSizeInBytes
,isSwap
);
7621 /* a horizontal or vertical slice viewed from top */
7622 else if (width
== 1 || height
== 1) {
7625 halveImagePackedPixelSlice(components
,
7626 extractPackedPixel
,shovePackedPixel
,
7627 width
, height
, depth
, dataIn
, dataOut
,
7628 pixelSizeInBytes
, rowSizeInBytes
,
7629 imageSizeInBytes
, isSwap
);
7635 int halfWidth
= width
/ 2;
7636 int halfHeight
= height
/ 2;
7637 int halfDepth
= depth
/ 2;
7638 const char *src
= (const char *) dataIn
;
7639 int padBytes
= rowSizeInBytes
- (width
*pixelSizeInBytes
);
7642 for (dd
= 0; dd
< halfDepth
; dd
++) {
7643 for (ii
= 0; ii
< halfHeight
; ii
++) {
7644 for (jj
= 0; jj
< halfWidth
; jj
++) {
7646 float totals
[4]; /* 4 is maximum components */
7647 float extractTotals
[BOX8
][4]; /* 4 is maximum components */
7650 (*extractPackedPixel
)(isSwap
,src
,
7651 &extractTotals
[0][0]);
7652 (*extractPackedPixel
)(isSwap
,(src
+pixelSizeInBytes
),
7653 &extractTotals
[1][0]);
7654 (*extractPackedPixel
)(isSwap
,(src
+rowSizeInBytes
),
7655 &extractTotals
[2][0]);
7656 (*extractPackedPixel
)(isSwap
,
7657 (src
+rowSizeInBytes
+pixelSizeInBytes
),
7658 &extractTotals
[3][0]);
7660 (*extractPackedPixel
)(isSwap
,(src
+imageSizeInBytes
),
7661 &extractTotals
[4][0]);
7662 (*extractPackedPixel
)(isSwap
,(src
+pixelSizeInBytes
+imageSizeInBytes
),
7663 &extractTotals
[5][0]);
7664 (*extractPackedPixel
)(isSwap
,(src
+rowSizeInBytes
+imageSizeInBytes
),
7665 &extractTotals
[6][0]);
7666 (*extractPackedPixel
)(isSwap
,
7667 (src
+rowSizeInBytes
+pixelSizeInBytes
+imageSizeInBytes
),
7668 &extractTotals
[7][0]);
7669 for (cc
= 0; cc
< components
; cc
++) {
7672 /* grab 8 pixels to average */
7674 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
7675 * extractTotals[2][RED]+extractTotals[3][RED]+
7676 * extractTotals[4][RED]+extractTotals[5][RED]+
7677 * extractTotals[6][RED]+extractTotals[7][RED];
7678 * totals[RED]/= 8.0;
7680 for (kk
= 0; kk
< BOX8
; kk
++) {
7681 totals
[cc
]+= extractTotals
[kk
][cc
];
7683 totals
[cc
]/= (float)BOX8
;
7685 (*shovePackedPixel
)(totals
,outIndex
,dataOut
);
7688 /* skip over to next square of 4 */
7689 src
+= pixelSizeInBytes
+ pixelSizeInBytes
;
7691 /* skip past pad bytes, if any, to get to next row */
7694 /* src is at beginning of a row here, but it's the second row of
7695 * the square block of 4 pixels that we just worked on so we
7696 * need to go one more row.
7704 src
+= rowSizeInBytes
;
7707 src
+= imageSizeInBytes
;
7710 /* both pointers must reach one byte after the end */
7711 assert(src
== &((const char *)dataIn
)[rowSizeInBytes
*height
*depth
]);
7712 assert(outIndex
== halfWidth
* halfHeight
* halfDepth
);
7715 } /* halveImagePackedPixel3D() */
7717 static int gluBuild3DMipmapLevelsCore(GLenum target
, GLint internalFormat
,
7721 GLsizei widthPowerOf2
,
7722 GLsizei heightPowerOf2
,
7723 GLsizei depthPowerOf2
,
7724 GLenum format
, GLenum type
,
7726 GLint baseLevel
,GLint maxLevel
,
7729 GLint newWidth
, newHeight
, newDepth
;
7730 GLint level
, levels
;
7731 const void *usersImage
;
7732 void *srcImage
, *dstImage
;
7733 __GLU_INIT_SWAP_IMAGE
;
7737 GLint myswapBytes
, groupsPerLine
, elementSize
, groupSize
;
7738 GLint rowsPerImage
, imageSize
;
7739 GLint rowSize
, padding
;
7740 PixelStorageModes psm
;
7742 assert(checkMipmapArgs(internalFormat
,format
,type
) == 0);
7743 assert(width
>= 1 && height
>= 1 && depth
>= 1);
7744 assert(type
!= GL_BITMAP
);
7746 srcImage
= dstImage
= NULL
;
7748 newWidth
= widthPowerOf2
;
7749 newHeight
= heightPowerOf2
;
7750 newDepth
= depthPowerOf2
;
7751 levels
= computeLog(newWidth
);
7752 level
= computeLog(newHeight
);
7753 if (level
> levels
) levels
=level
;
7754 level
= computeLog(newDepth
);
7755 if (level
> levels
) levels
=level
;
7759 retrieveStoreModes3D(&psm
);
7760 myswapBytes
= psm
.unpack_swap_bytes
;
7761 cmpts
= elements_per_group(format
,type
);
7762 if (psm
.unpack_row_length
> 0) {
7763 groupsPerLine
= psm
.unpack_row_length
;
7765 groupsPerLine
= width
;
7768 elementSize
= bytes_per_element(type
);
7769 groupSize
= elementSize
* cmpts
;
7770 if (elementSize
== 1) myswapBytes
= 0;
7773 if (psm
.unpack_image_height
> 0) {
7774 rowsPerImage
= psm
.unpack_image_height
;
7777 rowsPerImage
= height
;
7781 rowSize
= groupsPerLine
* groupSize
;
7782 padding
= (rowSize
% psm
.unpack_alignment
);
7784 rowSize
+= psm
.unpack_alignment
- padding
;
7787 imageSize
= rowsPerImage
* rowSize
; /* 3dstuff */
7789 usersImage
= (const GLubyte
*)data
+ psm
.unpack_skip_rows
* rowSize
+
7790 psm
.unpack_skip_pixels
* groupSize
+
7792 psm
.unpack_skip_images
* imageSize
;
7794 glPixelStorei(GL_UNPACK_SKIP_ROWS
, 0);
7795 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, 0);
7796 glPixelStorei(GL_UNPACK_ROW_LENGTH
, 0);
7797 glPixelStorei(GL_UNPACK_SKIP_IMAGES
, 0);
7798 glPixelStorei(GL_UNPACK_IMAGE_HEIGHT
, 0);
7802 if (width
== newWidth
&& height
== newHeight
&& depth
== newDepth
) {
7803 /* Use usersImage for level userLevel */
7804 if (baseLevel
<= level
&& level
<= maxLevel
) {
7805 gluTexImage3D(target
, level
, internalFormat
, width
,
7806 height
, depth
, 0, format
, type
,
7809 if(levels
== 0) { /* we're done. clean up and return */
7810 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
7811 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
7812 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
7813 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
7814 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
7815 glPixelStorei(GL_UNPACK_SKIP_IMAGES
, psm
.unpack_skip_images
);
7816 glPixelStorei(GL_UNPACK_IMAGE_HEIGHT
, psm
.unpack_image_height
);
7820 int nextWidth
= newWidth
/2;
7821 int nextHeight
= newHeight
/2;
7822 int nextDepth
= newDepth
/2;
7825 if (nextWidth
< 1) nextWidth
= 1;
7826 if (nextHeight
< 1) nextHeight
= 1;
7827 if (nextDepth
< 1) nextDepth
= 1;
7828 memReq
= imageSize3D(nextWidth
, nextHeight
, nextDepth
, format
, type
);
7831 case GL_UNSIGNED_BYTE
:
7832 dstImage
= (GLubyte
*)malloc(memReq
);
7835 dstImage
= (GLbyte
*)malloc(memReq
);
7837 case GL_UNSIGNED_SHORT
:
7838 dstImage
= (GLushort
*)malloc(memReq
);
7841 dstImage
= (GLshort
*)malloc(memReq
);
7843 case GL_UNSIGNED_INT
:
7844 dstImage
= (GLuint
*)malloc(memReq
);
7847 dstImage
= (GLint
*)malloc(memReq
);
7850 dstImage
= (GLfloat
*)malloc(memReq
);
7852 case GL_UNSIGNED_BYTE_3_3_2
:
7853 case GL_UNSIGNED_BYTE_2_3_3_REV
:
7854 dstImage
= (GLubyte
*)malloc(memReq
);
7856 case GL_UNSIGNED_SHORT_5_6_5
:
7857 case GL_UNSIGNED_SHORT_5_6_5_REV
:
7858 case GL_UNSIGNED_SHORT_4_4_4_4
:
7859 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
7860 case GL_UNSIGNED_SHORT_5_5_5_1
:
7861 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
7862 dstImage
= (GLushort
*)malloc(memReq
);
7864 case GL_UNSIGNED_INT_8_8_8_8
:
7865 case GL_UNSIGNED_INT_8_8_8_8_REV
:
7866 case GL_UNSIGNED_INT_10_10_10_2
:
7867 case GL_UNSIGNED_INT_2_10_10_10_REV
:
7868 dstImage
= (GLuint
*)malloc(memReq
);
7871 return GLU_INVALID_ENUM
; /* assertion */
7873 if (dstImage
== NULL
) {
7874 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
7875 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
7876 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
7877 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
7878 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
7879 glPixelStorei(GL_UNPACK_SKIP_IMAGES
, psm
.unpack_skip_images
);
7880 glPixelStorei(GL_UNPACK_IMAGE_HEIGHT
, psm
.unpack_image_height
);
7881 return GLU_OUT_OF_MEMORY
;
7885 case GL_UNSIGNED_BYTE
:
7887 halveImage3D(cmpts
,extractUbyte
,shoveUbyte
,
7889 usersImage
,dstImage
,elementSize
,groupSize
,rowSize
,
7890 imageSize
,myswapBytes
);
7893 halveImage_ubyte(cmpts
,width
,height
,usersImage
,dstImage
,
7894 elementSize
,rowSize
,groupSize
);
7899 halveImage3D(cmpts
,extractSbyte
,shoveSbyte
,
7901 usersImage
,dstImage
,elementSize
,groupSize
,rowSize
,
7902 imageSize
,myswapBytes
);
7905 halveImage_byte(cmpts
,width
,height
,usersImage
,dstImage
,
7906 elementSize
,rowSize
,groupSize
);
7909 case GL_UNSIGNED_SHORT
:
7911 halveImage3D(cmpts
,extractUshort
,shoveUshort
,
7913 usersImage
,dstImage
,elementSize
,groupSize
,rowSize
,
7914 imageSize
,myswapBytes
);
7917 halveImage_ushort(cmpts
,width
,height
,usersImage
,dstImage
,
7918 elementSize
,rowSize
,groupSize
,myswapBytes
);
7923 halveImage3D(cmpts
,extractSshort
,shoveSshort
,
7925 usersImage
,dstImage
,elementSize
,groupSize
,rowSize
,
7926 imageSize
,myswapBytes
);
7929 halveImage_short(cmpts
,width
,height
,usersImage
,dstImage
,
7930 elementSize
,rowSize
,groupSize
,myswapBytes
);
7933 case GL_UNSIGNED_INT
:
7935 halveImage3D(cmpts
,extractUint
,shoveUint
,
7937 usersImage
,dstImage
,elementSize
,groupSize
,rowSize
,
7938 imageSize
,myswapBytes
);
7941 halveImage_uint(cmpts
,width
,height
,usersImage
,dstImage
,
7942 elementSize
,rowSize
,groupSize
,myswapBytes
);
7947 halveImage3D(cmpts
,extractSint
,shoveSint
,
7949 usersImage
,dstImage
,elementSize
,groupSize
,rowSize
,
7950 imageSize
,myswapBytes
);
7953 halveImage_int(cmpts
,width
,height
,usersImage
,dstImage
,
7954 elementSize
,rowSize
,groupSize
,myswapBytes
);
7959 halveImage3D(cmpts
,extractFloat
,shoveFloat
,
7961 usersImage
,dstImage
,elementSize
,groupSize
,rowSize
,
7962 imageSize
,myswapBytes
);
7965 halveImage_float(cmpts
,width
,height
,usersImage
,dstImage
,
7966 elementSize
,rowSize
,groupSize
,myswapBytes
);
7969 case GL_UNSIGNED_BYTE_3_3_2
:
7970 assert(format
== GL_RGB
);
7971 halveImagePackedPixel3D(3,extract332
,shove332
,
7972 width
,height
,depth
,usersImage
,dstImage
,
7973 elementSize
,rowSize
,imageSize
,myswapBytes
);
7975 case GL_UNSIGNED_BYTE_2_3_3_REV
:
7976 assert(format
== GL_RGB
);
7977 halveImagePackedPixel3D(3,extract233rev
,shove233rev
,
7978 width
,height
,depth
,usersImage
,dstImage
,
7979 elementSize
,rowSize
,imageSize
,myswapBytes
);
7981 case GL_UNSIGNED_SHORT_5_6_5
:
7982 halveImagePackedPixel3D(3,extract565
,shove565
,
7983 width
,height
,depth
,usersImage
,dstImage
,
7984 elementSize
,rowSize
,imageSize
,myswapBytes
);
7986 case GL_UNSIGNED_SHORT_5_6_5_REV
:
7987 halveImagePackedPixel3D(3,extract565rev
,shove565rev
,
7988 width
,height
,depth
,usersImage
,dstImage
,
7989 elementSize
,rowSize
,imageSize
,myswapBytes
);
7991 case GL_UNSIGNED_SHORT_4_4_4_4
:
7992 halveImagePackedPixel3D(4,extract4444
,shove4444
,
7993 width
,height
,depth
,usersImage
,dstImage
,
7994 elementSize
,rowSize
,imageSize
,myswapBytes
);
7996 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
7997 halveImagePackedPixel3D(4,extract4444rev
,shove4444rev
,
7998 width
,height
,depth
,usersImage
,dstImage
,
7999 elementSize
,rowSize
,imageSize
,myswapBytes
);
8001 case GL_UNSIGNED_SHORT_5_5_5_1
:
8002 halveImagePackedPixel3D(4,extract5551
,shove5551
,
8003 width
,height
,depth
,usersImage
,dstImage
,
8004 elementSize
,rowSize
,imageSize
,myswapBytes
);
8006 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
8007 halveImagePackedPixel3D(4,extract1555rev
,shove1555rev
,
8008 width
,height
,depth
,usersImage
,dstImage
,
8009 elementSize
,rowSize
,imageSize
,myswapBytes
);
8011 case GL_UNSIGNED_INT_8_8_8_8
:
8012 halveImagePackedPixel3D(4,extract8888
,shove8888
,
8013 width
,height
,depth
,usersImage
,dstImage
,
8014 elementSize
,rowSize
,imageSize
,myswapBytes
);
8016 case GL_UNSIGNED_INT_8_8_8_8_REV
:
8017 halveImagePackedPixel3D(4,extract8888rev
,shove8888rev
,
8018 width
,height
,depth
,usersImage
,dstImage
,
8019 elementSize
,rowSize
,imageSize
,myswapBytes
);
8021 case GL_UNSIGNED_INT_10_10_10_2
:
8022 halveImagePackedPixel3D(4,extract1010102
,shove1010102
,
8023 width
,height
,depth
,usersImage
,dstImage
,
8024 elementSize
,rowSize
,imageSize
,myswapBytes
);
8026 case GL_UNSIGNED_INT_2_10_10_10_REV
:
8027 halveImagePackedPixel3D(4,extract2101010rev
,shove2101010rev
,
8028 width
,height
,depth
,usersImage
,dstImage
,
8029 elementSize
,rowSize
,imageSize
,myswapBytes
);
8036 newHeight
= height
/2;
8039 if (newWidth
< 1) newWidth
= 1;
8040 if (newHeight
< 1) newHeight
= 1;
8041 if (newDepth
< 1) newDepth
= 1;
8044 rowSize
= newWidth
* groupSize
;
8045 imageSize
= rowSize
* newHeight
; /* 3dstuff */
8046 memReq
= imageSize3D(newWidth
, newHeight
, newDepth
, format
, type
);
8047 /* Swap srcImage and dstImage */
8048 __GLU_SWAP_IMAGE(srcImage
,dstImage
);
8050 case GL_UNSIGNED_BYTE
:
8051 dstImage
= (GLubyte
*)malloc(memReq
);
8054 dstImage
= (GLbyte
*)malloc(memReq
);
8056 case GL_UNSIGNED_SHORT
:
8057 dstImage
= (GLushort
*)malloc(memReq
);
8060 dstImage
= (GLshort
*)malloc(memReq
);
8062 case GL_UNSIGNED_INT
:
8063 dstImage
= (GLuint
*)malloc(memReq
);
8066 dstImage
= (GLint
*)malloc(memReq
);
8069 dstImage
= (GLfloat
*)malloc(memReq
);
8071 case GL_UNSIGNED_BYTE_3_3_2
:
8072 case GL_UNSIGNED_BYTE_2_3_3_REV
:
8073 dstImage
= (GLubyte
*)malloc(memReq
);
8075 case GL_UNSIGNED_SHORT_5_6_5
:
8076 case GL_UNSIGNED_SHORT_5_6_5_REV
:
8077 case GL_UNSIGNED_SHORT_4_4_4_4
:
8078 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
8079 case GL_UNSIGNED_SHORT_5_5_5_1
:
8080 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
8081 dstImage
= (GLushort
*)malloc(memReq
);
8083 case GL_UNSIGNED_INT_8_8_8_8
:
8084 case GL_UNSIGNED_INT_8_8_8_8_REV
:
8085 case GL_UNSIGNED_INT_10_10_10_2
:
8086 case GL_UNSIGNED_INT_2_10_10_10_REV
:
8087 dstImage
= (GLuint
*)malloc(memReq
);
8090 return GLU_INVALID_ENUM
; /* assertion */
8092 if (dstImage
== NULL
) {
8093 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
8094 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
8095 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
8096 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
8097 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
8098 glPixelStorei(GL_UNPACK_SKIP_IMAGES
, psm
.unpack_skip_images
);
8099 glPixelStorei(GL_UNPACK_IMAGE_HEIGHT
, psm
.unpack_image_height
);
8100 return GLU_OUT_OF_MEMORY
;
8102 /* level userLevel+1 is in srcImage; level userLevel already saved */
8103 level
= userLevel
+1;
8104 } else {/* user's image is *not* nice power-of-2 sized square */
8105 memReq
= imageSize3D(newWidth
, newHeight
, newDepth
, format
, type
);
8107 case GL_UNSIGNED_BYTE
:
8108 dstImage
= (GLubyte
*)malloc(memReq
);
8111 dstImage
= (GLbyte
*)malloc(memReq
);
8113 case GL_UNSIGNED_SHORT
:
8114 dstImage
= (GLushort
*)malloc(memReq
);
8117 dstImage
= (GLshort
*)malloc(memReq
);
8119 case GL_UNSIGNED_INT
:
8120 dstImage
= (GLuint
*)malloc(memReq
);
8123 dstImage
= (GLint
*)malloc(memReq
);
8126 dstImage
= (GLfloat
*)malloc(memReq
);
8128 case GL_UNSIGNED_BYTE_3_3_2
:
8129 case GL_UNSIGNED_BYTE_2_3_3_REV
:
8130 dstImage
= (GLubyte
*)malloc(memReq
);
8132 case GL_UNSIGNED_SHORT_5_6_5
:
8133 case GL_UNSIGNED_SHORT_5_6_5_REV
:
8134 case GL_UNSIGNED_SHORT_4_4_4_4
:
8135 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
8136 case GL_UNSIGNED_SHORT_5_5_5_1
:
8137 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
8138 dstImage
= (GLushort
*)malloc(memReq
);
8140 case GL_UNSIGNED_INT_8_8_8_8
:
8141 case GL_UNSIGNED_INT_8_8_8_8_REV
:
8142 case GL_UNSIGNED_INT_10_10_10_2
:
8143 case GL_UNSIGNED_INT_2_10_10_10_REV
:
8144 dstImage
= (GLuint
*)malloc(memReq
);
8147 return GLU_INVALID_ENUM
; /* assertion */
8150 if (dstImage
== NULL
) {
8151 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
8152 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
8153 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
8154 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
8155 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
8156 glPixelStorei(GL_UNPACK_SKIP_IMAGES
, psm
.unpack_skip_images
);
8157 glPixelStorei(GL_UNPACK_IMAGE_HEIGHT
, psm
.unpack_image_height
);
8158 return GLU_OUT_OF_MEMORY
;
8160 /*printf("Build3DMipmaps(): ScaleImage3D %d %d %d->%d %d %d\n",
8161 width,height,depth,newWidth,newHeight,newDepth);*/
8163 gluScaleImage3D(format
, width
, height
, depth
, type
, usersImage
,
8164 newWidth
, newHeight
, newDepth
, type
, dstImage
);
8167 rowSize
= newWidth
* groupSize
;
8168 imageSize
= rowSize
* newHeight
; /* 3dstuff */
8169 /* Swap dstImage and srcImage */
8170 __GLU_SWAP_IMAGE(srcImage
,dstImage
);
8172 if(levels
!= 0) { /* use as little memory as possible */
8174 int nextWidth
= newWidth
/2;
8175 int nextHeight
= newHeight
/2;
8176 int nextDepth
= newDepth
/2;
8177 if (nextWidth
< 1) nextWidth
= 1;
8178 if (nextHeight
< 1) nextHeight
= 1;
8179 if (nextDepth
< 1) nextDepth
= 1;
8181 memReq
= imageSize3D(nextWidth
, nextHeight
, nextDepth
, format
, type
);
8184 case GL_UNSIGNED_BYTE
:
8185 dstImage
= (GLubyte
*)malloc(memReq
);
8188 dstImage
= (GLbyte
*)malloc(memReq
);
8190 case GL_UNSIGNED_SHORT
:
8191 dstImage
= (GLushort
*)malloc(memReq
);
8194 dstImage
= (GLshort
*)malloc(memReq
);
8196 case GL_UNSIGNED_INT
:
8197 dstImage
= (GLuint
*)malloc(memReq
);
8200 dstImage
= (GLint
*)malloc(memReq
);
8203 dstImage
= (GLfloat
*)malloc(memReq
);
8205 case GL_UNSIGNED_BYTE_3_3_2
:
8206 case GL_UNSIGNED_BYTE_2_3_3_REV
:
8207 dstImage
= (GLubyte
*)malloc(memReq
);
8209 case GL_UNSIGNED_SHORT_5_6_5
:
8210 case GL_UNSIGNED_SHORT_5_6_5_REV
:
8211 case GL_UNSIGNED_SHORT_4_4_4_4
:
8212 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
8213 case GL_UNSIGNED_SHORT_5_5_5_1
:
8214 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
8215 dstImage
= (GLushort
*)malloc(memReq
);
8217 case GL_UNSIGNED_INT_8_8_8_8
:
8218 case GL_UNSIGNED_INT_8_8_8_8_REV
:
8219 case GL_UNSIGNED_INT_10_10_10_2
:
8220 case GL_UNSIGNED_INT_2_10_10_10_REV
:
8221 dstImage
= (GLuint
*)malloc(memReq
);
8224 return GLU_INVALID_ENUM
; /* assertion */
8226 if (dstImage
== NULL
) {
8227 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
8228 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
8229 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
8230 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
8231 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
8232 glPixelStorei(GL_UNPACK_SKIP_IMAGES
, psm
.unpack_skip_images
);
8233 glPixelStorei(GL_UNPACK_IMAGE_HEIGHT
, psm
.unpack_image_height
);
8234 return GLU_OUT_OF_MEMORY
;
8237 /* level userLevel is in srcImage; nothing saved yet */
8241 glPixelStorei(GL_UNPACK_SWAP_BYTES
, GL_FALSE
);
8242 if (baseLevel
<= level
&& level
<= maxLevel
) {
8243 gluTexImage3D(target
, level
, internalFormat
, newWidth
, newHeight
, newDepth
,
8244 0,format
, type
, (void *)srcImage
);
8246 level
++; /* update current level for the loop */
8247 for (; level
<= levels
; level
++) {
8249 case GL_UNSIGNED_BYTE
:
8251 halveImage3D(cmpts
,extractUbyte
,shoveUbyte
,
8252 newWidth
,newHeight
,newDepth
,
8253 srcImage
,dstImage
,elementSize
,groupSize
,rowSize
,
8254 imageSize
,myswapBytes
);
8257 halveImage_ubyte(cmpts
,newWidth
,newHeight
,srcImage
,dstImage
,
8258 elementSize
,rowSize
,groupSize
);
8263 halveImage3D(cmpts
,extractSbyte
,shoveSbyte
,
8264 newWidth
,newHeight
,newDepth
,
8265 srcImage
,dstImage
,elementSize
,groupSize
,rowSize
,
8266 imageSize
,myswapBytes
);
8269 halveImage_byte(cmpts
,newWidth
,newHeight
,srcImage
,dstImage
,
8270 elementSize
,rowSize
,groupSize
);
8273 case GL_UNSIGNED_SHORT
:
8275 halveImage3D(cmpts
,extractUshort
,shoveUshort
,
8276 newWidth
,newHeight
,newDepth
,
8277 srcImage
,dstImage
,elementSize
,groupSize
,rowSize
,
8278 imageSize
,myswapBytes
);
8281 halveImage_ushort(cmpts
,newWidth
,newHeight
,srcImage
,dstImage
,
8282 elementSize
,rowSize
,groupSize
,myswapBytes
);
8287 halveImage3D(cmpts
,extractSshort
,shoveSshort
,
8288 newWidth
,newHeight
,newDepth
,
8289 srcImage
,dstImage
,elementSize
,groupSize
,rowSize
,
8290 imageSize
,myswapBytes
);
8293 halveImage_short(cmpts
,newWidth
,newHeight
,srcImage
,dstImage
,
8294 elementSize
,rowSize
,groupSize
,myswapBytes
);
8297 case GL_UNSIGNED_INT
:
8299 halveImage3D(cmpts
,extractUint
,shoveUint
,
8300 newWidth
,newHeight
,newDepth
,
8301 srcImage
,dstImage
,elementSize
,groupSize
,rowSize
,
8302 imageSize
,myswapBytes
);
8305 halveImage_uint(cmpts
,newWidth
,newHeight
,srcImage
,dstImage
,
8306 elementSize
,rowSize
,groupSize
,myswapBytes
);
8311 halveImage3D(cmpts
,extractSint
,shoveSint
,
8312 newWidth
,newHeight
,newDepth
,
8313 srcImage
,dstImage
,elementSize
,groupSize
,rowSize
,
8314 imageSize
,myswapBytes
);
8317 halveImage_int(cmpts
,newWidth
,newHeight
,srcImage
,dstImage
,
8318 elementSize
,rowSize
,groupSize
,myswapBytes
);
8323 halveImage3D(cmpts
,extractFloat
,shoveFloat
,
8324 newWidth
,newHeight
,newDepth
,
8325 srcImage
,dstImage
,elementSize
,groupSize
,rowSize
,
8326 imageSize
,myswapBytes
);
8329 halveImage_float(cmpts
,newWidth
,newHeight
,srcImage
,dstImage
,
8330 elementSize
,rowSize
,groupSize
,myswapBytes
);
8333 case GL_UNSIGNED_BYTE_3_3_2
:
8334 halveImagePackedPixel3D(3,extract332
,shove332
,
8335 newWidth
,newHeight
,newDepth
,
8336 srcImage
,dstImage
,elementSize
,rowSize
,
8337 imageSize
,myswapBytes
);
8339 case GL_UNSIGNED_BYTE_2_3_3_REV
:
8340 halveImagePackedPixel3D(3,extract233rev
,shove233rev
,
8341 newWidth
,newHeight
,newDepth
,
8342 srcImage
,dstImage
,elementSize
,rowSize
,
8343 imageSize
,myswapBytes
);
8345 case GL_UNSIGNED_SHORT_5_6_5
:
8346 halveImagePackedPixel3D(3,extract565
,shove565
,
8347 newWidth
,newHeight
,newDepth
,
8348 srcImage
,dstImage
,elementSize
,rowSize
,
8349 imageSize
,myswapBytes
);
8351 case GL_UNSIGNED_SHORT_5_6_5_REV
:
8352 halveImagePackedPixel3D(3,extract565rev
,shove565rev
,
8353 newWidth
,newHeight
,newDepth
,
8354 srcImage
,dstImage
,elementSize
,rowSize
,
8355 imageSize
,myswapBytes
);
8357 case GL_UNSIGNED_SHORT_4_4_4_4
:
8358 halveImagePackedPixel3D(4,extract4444
,shove4444
,
8359 newWidth
,newHeight
,newDepth
,
8360 srcImage
,dstImage
,elementSize
,rowSize
,
8361 imageSize
,myswapBytes
);
8363 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
8364 halveImagePackedPixel3D(4,extract4444rev
,shove4444rev
,
8365 newWidth
,newHeight
,newDepth
,
8366 srcImage
,dstImage
,elementSize
,rowSize
,
8367 imageSize
,myswapBytes
);
8369 case GL_UNSIGNED_SHORT_5_5_5_1
:
8370 halveImagePackedPixel3D(4,extract5551
,shove5551
,
8371 newWidth
,newHeight
,newDepth
,
8372 srcImage
,dstImage
,elementSize
,rowSize
,
8373 imageSize
,myswapBytes
);
8375 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
8376 halveImagePackedPixel3D(4,extract1555rev
,shove1555rev
,
8377 newWidth
,newHeight
,newDepth
,
8378 srcImage
,dstImage
,elementSize
,rowSize
,
8379 imageSize
,myswapBytes
);
8381 case GL_UNSIGNED_INT_8_8_8_8
:
8382 halveImagePackedPixel3D(4,extract8888
,shove8888
,
8383 newWidth
,newHeight
,newDepth
,
8384 srcImage
,dstImage
,elementSize
,rowSize
,
8385 imageSize
,myswapBytes
);
8387 case GL_UNSIGNED_INT_8_8_8_8_REV
:
8388 halveImagePackedPixel3D(4,extract8888rev
,shove8888rev
,
8389 newWidth
,newHeight
,newDepth
,
8390 srcImage
,dstImage
,elementSize
,rowSize
,
8391 imageSize
,myswapBytes
);
8393 case GL_UNSIGNED_INT_10_10_10_2
:
8394 halveImagePackedPixel3D(4,extract1010102
,shove1010102
,
8395 newWidth
,newHeight
,newDepth
,
8396 srcImage
,dstImage
,elementSize
,rowSize
,
8397 imageSize
,myswapBytes
);
8399 case GL_UNSIGNED_INT_2_10_10_10_REV
:
8400 halveImagePackedPixel3D(4,extract2101010rev
,shove2101010rev
,
8401 newWidth
,newHeight
,newDepth
,
8402 srcImage
,dstImage
,elementSize
,rowSize
,
8403 imageSize
,myswapBytes
);
8410 __GLU_SWAP_IMAGE(srcImage
,dstImage
);
8412 if (newWidth
> 1) { newWidth
/= 2; rowSize
/= 2;}
8413 if (newHeight
> 1) { newHeight
/= 2; imageSize
= rowSize
* newHeight
; }
8414 if (newDepth
> 1) newDepth
/= 2;
8416 /* call tex image with srcImage untouched since it's not padded */
8417 if (baseLevel
<= level
&& level
<= maxLevel
) {
8418 gluTexImage3D(target
, level
, internalFormat
, newWidth
, newHeight
,
8419 newDepth
,0, format
, type
, (void *) srcImage
);
8423 glPixelStorei(GL_UNPACK_ALIGNMENT
, psm
.unpack_alignment
);
8424 glPixelStorei(GL_UNPACK_SKIP_ROWS
, psm
.unpack_skip_rows
);
8425 glPixelStorei(GL_UNPACK_SKIP_PIXELS
, psm
.unpack_skip_pixels
);
8426 glPixelStorei(GL_UNPACK_ROW_LENGTH
, psm
.unpack_row_length
);
8427 glPixelStorei(GL_UNPACK_SWAP_BYTES
, psm
.unpack_swap_bytes
);
8428 glPixelStorei(GL_UNPACK_SKIP_IMAGES
, psm
.unpack_skip_images
);
8429 glPixelStorei(GL_UNPACK_IMAGE_HEIGHT
, psm
.unpack_image_height
);
8431 free(srcImage
); /*if you get to here, a srcImage has always been malloc'ed*/
8432 if (dstImage
) { /* if it's non-rectangular and only 1 level */
8436 } /* gluBuild3DMipmapLevelsCore() */
8439 gluBuild3DMipmapLevels(GLenum target
, GLint internalFormat
,
8440 GLsizei width
, GLsizei height
, GLsizei depth
,
8441 GLenum format
, GLenum type
,
8442 GLint userLevel
, GLint baseLevel
, GLint maxLevel
,
8447 int rc
= checkMipmapArgs(internalFormat
,format
,type
);
8448 if (rc
!= 0) return rc
;
8450 if (width
< 1 || height
< 1 || depth
< 1) {
8451 return GLU_INVALID_VALUE
;
8454 if(type
== GL_BITMAP
) {
8455 return GLU_INVALID_ENUM
;
8458 levels
= computeLog(width
);
8459 level
= computeLog(height
);
8460 if (level
> levels
) levels
=level
;
8461 level
= computeLog(depth
);
8462 if (level
> levels
) levels
=level
;
8465 if (!isLegalLevels(userLevel
,baseLevel
,maxLevel
,levels
))
8466 return GLU_INVALID_VALUE
;
8468 return gluBuild3DMipmapLevelsCore(target
, internalFormat
,
8469 width
, height
, depth
,
8470 width
, height
, depth
,
8472 userLevel
, baseLevel
, maxLevel
,
8474 } /* gluBuild3DMipmapLevels() */
8477 gluBuild3DMipmaps(GLenum target
, GLint internalFormat
,
8478 GLsizei width
, GLsizei height
, GLsizei depth
,
8479 GLenum format
, GLenum type
, const void *data
)
8481 GLint widthPowerOf2
, heightPowerOf2
, depthPowerOf2
;
8484 int rc
= checkMipmapArgs(internalFormat
,format
,type
);
8485 if (rc
!= 0) return rc
;
8487 if (width
< 1 || height
< 1 || depth
< 1) {
8488 return GLU_INVALID_VALUE
;
8491 if(type
== GL_BITMAP
) {
8492 return GLU_INVALID_ENUM
;
8495 closestFit3D(target
,width
,height
,depth
,internalFormat
,format
,type
,
8496 &widthPowerOf2
,&heightPowerOf2
,&depthPowerOf2
);
8498 levels
= computeLog(widthPowerOf2
);
8499 level
= computeLog(heightPowerOf2
);
8500 if (level
> levels
) levels
=level
;
8501 level
= computeLog(depthPowerOf2
);
8502 if (level
> levels
) levels
=level
;
8504 return gluBuild3DMipmapLevelsCore(target
, internalFormat
,
8505 width
, height
, depth
,
8506 widthPowerOf2
, heightPowerOf2
,
8508 format
, type
, 0, 0, levels
,
8510 } /* gluBuild3DMipmaps() */
8512 static GLdouble
extractUbyte(int isSwap
, const void *ubyte
)
8514 isSwap
= isSwap
; /* turn off warnings */
8516 assert(*((const GLubyte
*)ubyte
) <= 255);
8518 return (GLdouble
)(*((const GLubyte
*)ubyte
));
8519 } /* extractUbyte() */
8521 static void shoveUbyte(GLdouble value
, int index
, void *data
)
8523 assert(0.0 <= value
&& value
< 256.0);
8525 ((GLubyte
*)data
)[index
]= (GLubyte
)value
;
8526 } /* shoveUbyte() */
8528 static GLdouble
extractSbyte(int isSwap
, const void *sbyte
)
8530 isSwap
= isSwap
; /* turn off warnings */
8532 assert(*((const GLbyte
*)sbyte
) <= 127);
8534 return (GLdouble
)(*((const GLbyte
*)sbyte
));
8535 } /* extractSbyte() */
8537 static void shoveSbyte(GLdouble value
, int index
, void *data
)
8539 ((GLbyte
*)data
)[index
]= (GLbyte
)value
;
8540 } /* shoveSbyte() */
8542 static GLdouble
extractUshort(int isSwap
, const void *uitem
)
8547 ushort
= __GLU_SWAP_2_BYTES(uitem
);
8550 ushort
= *(const GLushort
*)uitem
;
8553 assert(ushort
<= 65535);
8555 return (GLdouble
)ushort
;
8556 } /* extractUshort() */
8558 static void shoveUshort(GLdouble value
, int index
, void *data
)
8560 assert(0.0 <= value
&& value
< 65536.0);
8562 ((GLushort
*)data
)[index
]= (GLushort
)value
;
8563 } /* shoveUshort() */
8565 static GLdouble
extractSshort(int isSwap
, const void *sitem
)
8570 sshort
= __GLU_SWAP_2_BYTES(sitem
);
8573 sshort
= *(const GLshort
*)sitem
;
8576 assert(sshort
<= 32767);
8578 return (GLdouble
)sshort
;
8579 } /* extractSshort() */
8581 static void shoveSshort(GLdouble value
, int index
, void *data
)
8583 assert(0.0 <= value
&& value
< 32768.0);
8585 ((GLshort
*)data
)[index
]= (GLshort
)value
;
8586 } /* shoveSshort() */
8588 static GLdouble
extractUint(int isSwap
, const void *uitem
)
8593 uint
= __GLU_SWAP_4_BYTES(uitem
);
8596 uint
= *(const GLuint
*)uitem
;
8599 assert(uint
<= 0xffffffff);
8601 return (GLdouble
)uint
;
8602 } /* extractUint() */
8604 static void shoveUint(GLdouble value
, int index
, void *data
)
8606 assert(0.0 <= value
&& value
<= (GLdouble
) UINT_MAX
);
8608 ((GLuint
*)data
)[index
]= (GLuint
)value
;
8611 static GLdouble
extractSint(int isSwap
, const void *sitem
)
8616 sint
= __GLU_SWAP_4_BYTES(sitem
);
8619 sint
= *(const GLint
*)sitem
;
8622 assert(sint
<= 0x7fffffff);
8624 return (GLdouble
)sint
;
8625 } /* extractSint() */
8627 static void shoveSint(GLdouble value
, int index
, void *data
)
8629 assert(0.0 <= value
&& value
<= (GLdouble
) INT_MAX
);
8631 ((GLint
*)data
)[index
]= (GLint
)value
;
8634 static GLdouble
extractFloat(int isSwap
, const void *item
)
8639 ffloat
= __GLU_SWAP_4_BYTES(item
);
8642 ffloat
= *(const GLfloat
*)item
;
8645 assert(ffloat
<= 1.0);
8647 return (GLdouble
)ffloat
;
8648 } /* extractFloat() */
8650 static void shoveFloat(GLdouble value
, int index
, void *data
)
8652 assert(0.0 <= value
&& value
<= 1.0);
8654 ((GLfloat
*)data
)[index
]= value
;
8655 } /* shoveFloat() */
8657 static void halveImageSlice(int components
,
8658 GLdouble (*extract
)(int, const void *),
8659 void (*shove
)(GLdouble
, int, void *),
8660 GLint width
, GLint height
, GLint depth
,
8661 const void *dataIn
, void *dataOut
,
8662 GLint elementSizeInBytes
,
8663 GLint groupSizeInBytes
,
8664 GLint rowSizeInBytes
,
8665 GLint imageSizeInBytes
,
8669 int halfWidth
= width
/ 2;
8670 int halfHeight
= height
/ 2;
8671 int halfDepth
= depth
/ 2;
8672 const char *src
= (const char *)dataIn
;
8673 int rowPadBytes
= rowSizeInBytes
- (width
* groupSizeInBytes
);
8674 int imagePadBytes
= imageSizeInBytes
- (width
*height
*groupSizeInBytes
);
8677 assert((width
== 1 || height
== 1) && depth
>= 2);
8679 if (width
== height
) { /* a 1-pixel column viewed from top */
8680 /* printf("1-column\n");*/
8681 assert(width
== 1 && height
== 1);
8684 for (ii
= 0; ii
< halfDepth
; ii
++) {
8687 for (cc
= 0; cc
< components
; cc
++) {
8689 double extractTotals
[BOX2
][4];
8692 extractTotals
[0][cc
]= (*extract
)(isSwap
,src
);
8693 extractTotals
[1][cc
]= (*extract
)(isSwap
,(src
+imageSizeInBytes
));
8695 /* average 2 pixels since only a column */
8697 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED];
8698 * totals[RED]/= 2.0;
8700 for (kk
= 0; kk
< BOX2
; kk
++) {
8701 totals
[cc
]+= extractTotals
[kk
][cc
];
8703 totals
[cc
]/= (double)BOX2
;
8705 (*shove
)(totals
[cc
],outIndex
,dataOut
);
8707 src
+= elementSizeInBytes
;
8710 /* skip over to next group of 2 */
8711 src
+= rowSizeInBytes
;
8714 assert(src
== &((const char *)dataIn
)[rowSizeInBytes
*height
*depth
]);
8715 assert(outIndex
== halfDepth
* components
);
8717 else if (height
== 1) { /* horizontal slice viewed from top */
8718 /* printf("horizontal slice\n"); */
8721 for (ii
= 0; ii
< halfDepth
; ii
++) {
8722 for (jj
= 0; jj
< halfWidth
; jj
++) {
8725 for (cc
= 0; cc
< components
; cc
++) {
8728 double extractTotals
[BOX4
][4];
8730 extractTotals
[0][cc
]=(*extract
)(isSwap
,src
);
8731 extractTotals
[1][cc
]=(*extract
)(isSwap
,
8732 (src
+groupSizeInBytes
));
8733 extractTotals
[2][cc
]=(*extract
)(isSwap
,
8734 (src
+imageSizeInBytes
));
8735 extractTotals
[3][cc
]=(*extract
)(isSwap
,
8736 (src
+imageSizeInBytes
+groupSizeInBytes
));
8738 /* grab 4 pixels to average */
8740 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
8741 * extractTotals[2][RED]+extractTotals[3][RED];
8742 * totals[RED]/= 4.0;
8744 for (kk
= 0; kk
< BOX4
; kk
++) {
8745 totals
[cc
]+= extractTotals
[kk
][cc
];
8747 totals
[cc
]/= (double)BOX4
;
8749 (*shove
)(totals
[cc
],outIndex
,dataOut
);
8752 src
+= elementSizeInBytes
;
8755 /* skip over to next horizontal square of 4 */
8756 src
+= groupSizeInBytes
;
8760 src
+= rowSizeInBytes
;
8763 assert(src
== &((const char *)dataIn
)[rowSizeInBytes
*height
*depth
]);
8764 assert(outIndex
== halfWidth
* halfDepth
* components
);
8766 else if (width
== 1) { /* vertical slice viewed from top */
8767 /* printf("vertical slice\n"); */
8768 assert(height
!= 1);
8770 for (ii
= 0; ii
< halfDepth
; ii
++) {
8771 for (jj
= 0; jj
< halfHeight
; jj
++) {
8774 for (cc
= 0; cc
< components
; cc
++) {
8777 double extractTotals
[BOX4
][4];
8779 extractTotals
[0][cc
]=(*extract
)(isSwap
,src
);
8780 extractTotals
[1][cc
]=(*extract
)(isSwap
,
8781 (src
+rowSizeInBytes
));
8782 extractTotals
[2][cc
]=(*extract
)(isSwap
,
8783 (src
+imageSizeInBytes
));
8784 extractTotals
[3][cc
]=(*extract
)(isSwap
,
8785 (src
+imageSizeInBytes
+rowSizeInBytes
));
8787 /* grab 4 pixels to average */
8789 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
8790 * extractTotals[2][RED]+extractTotals[3][RED];
8791 * totals[RED]/= 4.0;
8793 for (kk
= 0; kk
< BOX4
; kk
++) {
8794 totals
[cc
]+= extractTotals
[kk
][cc
];
8796 totals
[cc
]/= (double)BOX4
;
8798 (*shove
)(totals
[cc
],outIndex
,dataOut
);
8801 src
+= elementSizeInBytes
;
8805 /* skip over to next vertical square of 4 */
8806 src
+= rowSizeInBytes
;
8808 src
+= imagePadBytes
;
8810 src
+= imageSizeInBytes
;
8813 assert(src
== &((const char *)dataIn
)[rowSizeInBytes
*height
*depth
]);
8814 assert(outIndex
== halfHeight
* halfDepth
* components
);
8817 } /* halveImageSlice() */
8819 static void halveImage3D(int components
,
8820 GLdouble (*extract
)(int, const void *),
8821 void (*shove
)(GLdouble
, int, void *),
8822 GLint width
, GLint height
, GLint depth
,
8823 const void *dataIn
, void *dataOut
,
8824 GLint elementSizeInBytes
,
8825 GLint groupSizeInBytes
,
8826 GLint rowSizeInBytes
,
8827 GLint imageSizeInBytes
,
8832 /* a horizontal/vertical/one-column slice viewed from top */
8833 if (width
== 1 || height
== 1) {
8836 halveImageSlice(components
,extract
,shove
, width
, height
, depth
,
8837 dataIn
, dataOut
, elementSizeInBytes
, groupSizeInBytes
,
8838 rowSizeInBytes
, imageSizeInBytes
, isSwap
);
8844 int halfWidth
= width
/ 2;
8845 int halfHeight
= height
/ 2;
8846 int halfDepth
= depth
/ 2;
8847 const char *src
= (const char *) dataIn
;
8848 int rowPadBytes
= rowSizeInBytes
- (width
*groupSizeInBytes
);
8849 int imagePadBytes
= imageSizeInBytes
- (width
*height
*groupSizeInBytes
);
8852 for (dd
= 0; dd
< halfDepth
; dd
++) {
8853 for (ii
= 0; ii
< halfHeight
; ii
++) {
8854 for (jj
= 0; jj
< halfWidth
; jj
++) {
8857 for (cc
= 0; cc
< components
; cc
++) {
8860 double totals
[4]; /* 4 is maximum components */
8861 double extractTotals
[BOX8
][4]; /* 4 is maximum components */
8863 extractTotals
[0][cc
]= (*extract
)(isSwap
,src
);
8864 extractTotals
[1][cc
]= (*extract
)(isSwap
,
8865 (src
+groupSizeInBytes
));
8866 extractTotals
[2][cc
]= (*extract
)(isSwap
,
8867 (src
+rowSizeInBytes
));
8868 extractTotals
[3][cc
]= (*extract
)(isSwap
,
8869 (src
+rowSizeInBytes
+groupSizeInBytes
));
8871 extractTotals
[4][cc
]= (*extract
)(isSwap
,
8872 (src
+imageSizeInBytes
));
8874 extractTotals
[5][cc
]= (*extract
)(isSwap
,
8875 (src
+groupSizeInBytes
+imageSizeInBytes
));
8876 extractTotals
[6][cc
]= (*extract
)(isSwap
,
8877 (src
+rowSizeInBytes
+imageSizeInBytes
));
8878 extractTotals
[7][cc
]= (*extract
)(isSwap
,
8879 (src
+rowSizeInBytes
+groupSizeInBytes
+imageSizeInBytes
));
8883 /* totals[RED]= extractTotals[0][RED]+extractTotals[1][RED]+
8884 * extractTotals[2][RED]+extractTotals[3][RED]+
8885 * extractTotals[4][RED]+extractTotals[5][RED]+
8886 * extractTotals[6][RED]+extractTotals[7][RED];
8887 * totals[RED]/= 8.0;
8889 for (kk
= 0; kk
< BOX8
; kk
++) {
8890 totals
[cc
]+= extractTotals
[kk
][cc
];
8892 totals
[cc
]/= (double)BOX8
;
8894 (*shove
)(totals
[cc
],outIndex
,dataOut
);
8898 src
+= elementSizeInBytes
; /* go to next component */
8901 /* skip over to next square of 4 */
8902 src
+= groupSizeInBytes
;
8904 /* skip past pad bytes, if any, to get to next row */
8907 /* src is at beginning of a row here, but it's the second row of
8908 * the square block of 4 pixels that we just worked on so we
8909 * need to go one more row.
8917 src
+= rowSizeInBytes
;
8920 /* skip past pad bytes, if any, to get to next image */
8921 src
+= imagePadBytes
;
8923 src
+= imageSizeInBytes
;
8926 /* both pointers must reach one byte after the end */
8927 assert(src
== &((const char *)dataIn
)[rowSizeInBytes
*height
*depth
]);
8928 assert(outIndex
== halfWidth
* halfHeight
* halfDepth
* components
);
8930 } /* halveImage3D() */