1 /* $Id: image.c,v 1.53 2001/01/23 23:39:36 brianp Exp $ */
4 * Mesa 3-D graphics library
7 * Copyright (C) 1999-2000 Brian Paul All Rights Reserved.
9 * Permission is hereby granted, free of charge, to any person obtaining a
10 * copy of this software and associated documentation files (the "Software"),
11 * to deal in the Software without restriction, including without limitation
12 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
13 * and/or sell copies of the Software, and to permit persons to whom the
14 * Software is furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included
17 * in all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
23 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
24 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
35 #include "histogram.h"
46 * These are the image packing parameters for Mesa's internal images.
47 * That is, _mesa_unpack_image() returns image data in this format.
48 * When we execute image commands (glDrawPixels, glTexImage, etc)
49 * from within display lists we have to be sure to set the current
50 * unpacking params to these values!
52 const struct gl_pixelstore_attrib _mesa_native_packing
= {
59 GL_FALSE
, /* SwapBytes */
60 GL_FALSE
/* LsbFirst */
66 * Flip the 8 bits in each byte of the given array.
68 * XXX try this trick to flip bytes someday:
69 * v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555);
70 * v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333);
71 * v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f);
74 flip_bytes( GLubyte
*p
, GLuint n
)
76 register GLuint i
, a
, b
;
79 b
= (GLuint
) p
[i
]; /* words are often faster than bytes */
80 a
= ((b
& 0x01) << 7) |
94 * Flip the order of the 2 bytes in each word in the given array.
97 _mesa_swap2( GLushort
*p
, GLuint n
)
102 p
[i
] = (p
[i
] >> 8) | ((p
[i
] << 8) & 0xff00);
109 * Flip the order of the 4 bytes in each word in the given array.
112 _mesa_swap4( GLuint
*p
, GLuint n
)
114 register GLuint i
, a
, b
;
119 | ((b
>> 8) & 0xff00)
120 | ((b
<< 8) & 0xff0000)
121 | ((b
<< 24) & 0xff000000);
130 * Return the size, in bytes, of the given GL datatype.
131 * Return 0 if GL_BITMAP.
132 * Return -1 if invalid type enum.
134 GLint
_mesa_sizeof_type( GLenum type
)
139 case GL_UNSIGNED_BYTE
:
140 return sizeof(GLubyte
);
142 return sizeof(GLbyte
);
143 case GL_UNSIGNED_SHORT
:
144 return sizeof(GLushort
);
146 return sizeof(GLshort
);
147 case GL_UNSIGNED_INT
:
148 return sizeof(GLuint
);
150 return sizeof(GLint
);
152 return sizeof(GLfloat
);
160 * Same as _mesa_sizeof_packed_type() but we also accept the
161 * packed pixel format datatypes.
163 GLint
_mesa_sizeof_packed_type( GLenum type
)
168 case GL_UNSIGNED_BYTE
:
169 return sizeof(GLubyte
);
171 return sizeof(GLbyte
);
172 case GL_UNSIGNED_SHORT
:
173 return sizeof(GLushort
);
175 return sizeof(GLshort
);
176 case GL_UNSIGNED_INT
:
177 return sizeof(GLuint
);
179 return sizeof(GLint
);
181 return sizeof(GLfloat
);
182 case GL_UNSIGNED_BYTE_3_3_2
:
183 return sizeof(GLubyte
);
184 case GL_UNSIGNED_BYTE_2_3_3_REV
:
185 return sizeof(GLubyte
);
186 case GL_UNSIGNED_SHORT_5_6_5
:
187 return sizeof(GLshort
);
188 case GL_UNSIGNED_SHORT_5_6_5_REV
:
189 return sizeof(GLshort
);
190 case GL_UNSIGNED_SHORT_4_4_4_4
:
191 return sizeof(GLshort
);
192 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
193 return sizeof(GLshort
);
194 case GL_UNSIGNED_SHORT_5_5_5_1
:
195 return sizeof(GLshort
);
196 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
197 return sizeof(GLshort
);
198 case GL_UNSIGNED_INT_8_8_8_8
:
199 return sizeof(GLuint
);
200 case GL_UNSIGNED_INT_8_8_8_8_REV
:
201 return sizeof(GLuint
);
202 case GL_UNSIGNED_INT_10_10_10_2
:
203 return sizeof(GLuint
);
204 case GL_UNSIGNED_INT_2_10_10_10_REV
:
205 return sizeof(GLuint
);
214 * Return the number of components in a GL enum pixel type.
215 * Return -1 if bad format.
217 GLint
_mesa_components_in_format( GLenum format
)
221 case GL_COLOR_INDEX1_EXT
:
222 case GL_COLOR_INDEX2_EXT
:
223 case GL_COLOR_INDEX4_EXT
:
224 case GL_COLOR_INDEX8_EXT
:
225 case GL_COLOR_INDEX12_EXT
:
226 case GL_COLOR_INDEX16_EXT
:
227 case GL_STENCIL_INDEX
:
228 case GL_DEPTH_COMPONENT
:
236 case GL_LUMINANCE_ALPHA
:
255 * Return bytes per pixel for given format and type
256 * Return -1 if bad format or type.
258 GLint
_mesa_bytes_per_pixel( GLenum format
, GLenum type
)
260 GLint comps
= _mesa_components_in_format( format
);
266 return 0; /* special case */
268 case GL_UNSIGNED_BYTE
:
269 return comps
* sizeof(GLubyte
);
271 case GL_UNSIGNED_SHORT
:
272 return comps
* sizeof(GLshort
);
274 case GL_UNSIGNED_INT
:
275 return comps
* sizeof(GLint
);
277 return comps
* sizeof(GLfloat
);
278 case GL_UNSIGNED_BYTE_3_3_2
:
279 case GL_UNSIGNED_BYTE_2_3_3_REV
:
280 if (format
== GL_RGB
|| format
== GL_BGR
)
281 return sizeof(GLubyte
);
283 return -1; /* error */
284 case GL_UNSIGNED_SHORT_5_6_5
:
285 case GL_UNSIGNED_SHORT_5_6_5_REV
:
286 if (format
== GL_RGB
|| format
== GL_BGR
)
287 return sizeof(GLshort
);
289 return -1; /* error */
290 case GL_UNSIGNED_SHORT_4_4_4_4
:
291 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
292 case GL_UNSIGNED_SHORT_5_5_5_1
:
293 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
294 if (format
== GL_RGBA
|| format
== GL_BGRA
|| format
== GL_ABGR_EXT
)
295 return sizeof(GLushort
);
298 case GL_UNSIGNED_INT_8_8_8_8
:
299 case GL_UNSIGNED_INT_8_8_8_8_REV
:
300 case GL_UNSIGNED_INT_10_10_10_2
:
301 case GL_UNSIGNED_INT_2_10_10_10_REV
:
302 if (format
== GL_RGBA
|| format
== GL_BGRA
|| format
== GL_ABGR_EXT
)
303 return sizeof(GLuint
);
313 * Test if the given pixel format and type are legal.
314 * Return GL_TRUE for legal, GL_FALSE for illegal.
317 _mesa_is_legal_format_and_type( GLenum format
, GLenum type
)
321 case GL_STENCIL_INDEX
:
325 case GL_UNSIGNED_BYTE
:
327 case GL_UNSIGNED_SHORT
:
329 case GL_UNSIGNED_INT
:
341 case GL_LUMINANCE_ALPHA
:
342 case GL_DEPTH_COMPONENT
:
345 case GL_UNSIGNED_BYTE
:
347 case GL_UNSIGNED_SHORT
:
349 case GL_UNSIGNED_INT
:
359 case GL_UNSIGNED_BYTE
:
361 case GL_UNSIGNED_SHORT
:
363 case GL_UNSIGNED_INT
:
365 case GL_UNSIGNED_BYTE_3_3_2
:
366 case GL_UNSIGNED_BYTE_2_3_3_REV
:
367 case GL_UNSIGNED_SHORT_5_6_5
:
368 case GL_UNSIGNED_SHORT_5_6_5_REV
:
378 case GL_UNSIGNED_BYTE
:
380 case GL_UNSIGNED_SHORT
:
382 case GL_UNSIGNED_INT
:
384 case GL_UNSIGNED_SHORT_4_4_4_4
:
385 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
386 case GL_UNSIGNED_SHORT_5_5_5_1
:
387 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
388 case GL_UNSIGNED_INT_8_8_8_8
:
389 case GL_UNSIGNED_INT_8_8_8_8_REV
:
390 case GL_UNSIGNED_INT_10_10_10_2
:
391 case GL_UNSIGNED_INT_2_10_10_10_REV
:
405 * Return the address of a pixel in an image (actually a volume).
406 * Pixel unpacking/packing parameters are observed according to 'packing'.
407 * Input: image - start of image data
408 * width, height - size of image
409 * format - image format
410 * type - pixel component type
411 * packing - the pixelstore attributes
412 * img - which image in the volume (0 for 1D or 2D images)
413 * row, column - location of pixel in the image
414 * Return: address of pixel at (image,row,column) in image or NULL if error.
417 _mesa_image_address( const struct gl_pixelstore_attrib
*packing
,
418 const GLvoid
*image
, GLsizei width
,
419 GLsizei height
, GLenum format
, GLenum type
,
420 GLint img
, GLint row
, GLint column
)
422 GLint alignment
; /* 1, 2 or 4 */
423 GLint pixels_per_row
;
424 GLint rows_per_image
;
427 GLint skipimages
; /* for 3-D volume images */
430 alignment
= packing
->Alignment
;
431 if (packing
->RowLength
> 0) {
432 pixels_per_row
= packing
->RowLength
;
435 pixels_per_row
= width
;
437 if (packing
->ImageHeight
> 0) {
438 rows_per_image
= packing
->ImageHeight
;
441 rows_per_image
= height
;
443 skiprows
= packing
->SkipRows
;
444 skippixels
= packing
->SkipPixels
;
445 skipimages
= packing
->SkipImages
;
447 if (type
==GL_BITMAP
) {
449 GLint comp_per_pixel
; /* components per pixel */
450 GLint bytes_per_comp
; /* bytes per component */
452 GLint bytes_per_image
;
454 /* Compute bytes per component */
455 bytes_per_comp
= _mesa_sizeof_packed_type( type
);
456 if (bytes_per_comp
<0) {
460 /* Compute number of components per pixel */
461 comp_per_pixel
= _mesa_components_in_format( format
);
462 if (comp_per_pixel
<0 && type
!= GL_BITMAP
) {
466 bytes_per_row
= alignment
467 * CEILING( comp_per_pixel
*pixels_per_row
, 8*alignment
);
469 bytes_per_image
= bytes_per_row
* rows_per_image
;
471 pixel_addr
= (GLubyte
*) image
472 + (skipimages
+ img
) * bytes_per_image
473 + (skiprows
+ row
) * bytes_per_row
474 + (skippixels
+ column
) / 8;
477 /* Non-BITMAP data */
478 GLint bytes_per_pixel
, bytes_per_row
, remainder
, bytes_per_image
;
480 bytes_per_pixel
= _mesa_bytes_per_pixel( format
, type
);
482 /* The pixel type and format should have been error checked earlier */
483 assert(bytes_per_pixel
> 0);
485 bytes_per_row
= pixels_per_row
* bytes_per_pixel
;
486 remainder
= bytes_per_row
% alignment
;
488 bytes_per_row
+= (alignment
- remainder
);
490 ASSERT(bytes_per_row
% alignment
== 0);
492 bytes_per_image
= bytes_per_row
* rows_per_image
;
494 /* compute final pixel address */
495 pixel_addr
= (GLubyte
*) image
496 + (skipimages
+ img
) * bytes_per_image
497 + (skiprows
+ row
) * bytes_per_row
498 + (skippixels
+ column
) * bytes_per_pixel
;
501 return (GLvoid
*) pixel_addr
;
507 * Compute the stride between image rows (in bytes) for the given
508 * pixel packing parameters and image width, format and type.
511 _mesa_image_row_stride( const struct gl_pixelstore_attrib
*packing
,
512 GLint width
, GLenum format
, GLenum type
)
515 if (type
== GL_BITMAP
) {
517 if (packing
->RowLength
== 0) {
518 GLint bytes
= (width
+ 7) / 8;
522 GLint bytes
= (packing
->RowLength
+ 7) / 8;
527 /* Non-BITMAP data */
528 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
529 GLint bytesPerRow
, remainder
;
530 if (bytesPerPixel
<= 0)
531 return -1; /* error */
532 if (packing
->RowLength
== 0) {
533 bytesPerRow
= bytesPerPixel
* width
;
536 bytesPerRow
= bytesPerPixel
* packing
->RowLength
;
538 remainder
= bytesPerRow
% packing
->Alignment
;
540 bytesPerRow
+= (packing
->Alignment
- remainder
);
548 * Unpack a 32x32 pixel polygon stipple from user memory using the
549 * current pixel unpack settings.
552 _mesa_unpack_polygon_stipple( const GLubyte
*pattern
, GLuint dest
[32],
553 const struct gl_pixelstore_attrib
*unpacking
)
555 GLubyte
*ptrn
= (GLubyte
*) _mesa_unpack_bitmap( 32, 32, pattern
, unpacking
);
557 /* Convert pattern from GLubytes to GLuints and handle big/little
562 for (i
= 0; i
< 32; i
++) {
563 dest
[i
] = (p
[0] << 24)
576 * Pack polygon stipple into user memory given current pixel packing
580 _mesa_pack_polygon_stipple( const GLuint pattern
[32], GLubyte
*dest
,
581 const struct gl_pixelstore_attrib
*packing
)
583 /* Convert pattern from GLuints to GLubytes to handle big/little
584 * endian differences.
588 for (i
= 0; i
< 32; i
++) {
589 ptrn
[i
* 4 + 0] = (GLubyte
) ((pattern
[i
] >> 24) & 0xff);
590 ptrn
[i
* 4 + 1] = (GLubyte
) ((pattern
[i
] >> 16) & 0xff);
591 ptrn
[i
* 4 + 2] = (GLubyte
) ((pattern
[i
] >> 8 ) & 0xff);
592 ptrn
[i
* 4 + 3] = (GLubyte
) ((pattern
[i
] ) & 0xff);
595 _mesa_pack_bitmap(32, 32, ptrn
, dest
, packing
);
600 * Unpack bitmap data. Resulting data will be in most-significant-bit-first
601 * order with row alignment = 1 byte.
604 _mesa_unpack_bitmap( GLint width
, GLint height
, const GLubyte
*pixels
,
605 const struct gl_pixelstore_attrib
*packing
)
607 GLint bytes
, row
, width_in_bytes
;
608 GLubyte
*buffer
, *dst
;
613 /* Alloc dest storage */
614 bytes
= ((width
+ 7) / 8 * height
);
615 buffer
= (GLubyte
*) MALLOC( bytes
);
620 width_in_bytes
= CEILING( width
, 8 );
622 for (row
= 0; row
< height
; row
++) {
623 GLubyte
*src
= _mesa_image_address( packing
, pixels
, width
, height
,
624 GL_COLOR_INDEX
, GL_BITMAP
,
631 if (packing
->SkipPixels
== 0) {
632 MEMCPY( dst
, src
, width_in_bytes
);
633 if (packing
->LsbFirst
) {
634 flip_bytes( dst
, width_in_bytes
);
638 /* handling SkipPixels is a bit tricky (no pun intended!) */
640 if (packing
->LsbFirst
) {
641 GLubyte srcMask
= 1 << (packing
->SkipPixels
& 0x7);
642 GLubyte dstMask
= 128;
646 for (i
= 0; i
< width
; i
++) {
650 if (srcMask
== 128) {
655 srcMask
= srcMask
<< 1;
663 dstMask
= dstMask
>> 1;
668 GLubyte srcMask
= 128 >> (packing
->SkipPixels
& 0x7);
669 GLubyte dstMask
= 128;
673 for (i
= 0; i
< width
; i
++) {
682 srcMask
= srcMask
>> 1;
690 dstMask
= dstMask
>> 1;
695 dst
+= width_in_bytes
;
706 _mesa_pack_bitmap( GLint width
, GLint height
, const GLubyte
*source
,
707 GLubyte
*dest
, const struct gl_pixelstore_attrib
*packing
)
709 GLint row
, width_in_bytes
;
715 width_in_bytes
= CEILING( width
, 8 );
717 for (row
= 0; row
< height
; row
++) {
718 GLubyte
*dst
= _mesa_image_address( packing
, dest
, width
, height
,
719 GL_COLOR_INDEX
, GL_BITMAP
,
724 if (packing
->SkipPixels
== 0) {
725 MEMCPY( dst
, src
, width_in_bytes
);
726 if (packing
->LsbFirst
) {
727 flip_bytes( dst
, width_in_bytes
);
731 /* handling SkipPixels is a bit tricky (no pun intended!) */
733 if (packing
->LsbFirst
) {
734 GLubyte srcMask
= 1 << (packing
->SkipPixels
& 0x7);
735 GLubyte dstMask
= 128;
736 const GLubyte
*s
= src
;
739 for (i
= 0; i
< width
; i
++) {
743 if (srcMask
== 128) {
748 srcMask
= srcMask
<< 1;
756 dstMask
= dstMask
>> 1;
761 GLubyte srcMask
= 128 >> (packing
->SkipPixels
& 0x7);
762 GLubyte dstMask
= 128;
763 const GLubyte
*s
= src
;
766 for (i
= 0; i
< width
; i
++) {
775 srcMask
= srcMask
>> 1;
783 dstMask
= dstMask
>> 1;
788 src
+= width_in_bytes
;
795 _mesa_pack_float_rgba_span( GLcontext
*ctx
,
796 GLuint n
, CONST GLfloat rgbaIn
[][4],
797 GLenum dstFormat
, GLenum dstType
,
799 const struct gl_pixelstore_attrib
*dstPacking
,
802 const GLint comps
= _mesa_components_in_format(dstFormat
);
803 GLfloat luminance
[MAX_WIDTH
];
808 /* make copy of incoming data */
809 GLfloat rgbaCopy
[MAX_WIDTH
][4];
810 for (i
= 0; i
< n
; i
++) {
811 rgbaCopy
[i
][0] = rgbaIn
[i
][0];
812 rgbaCopy
[i
][1] = rgbaIn
[i
][1];
813 rgbaCopy
[i
][2] = rgbaIn
[i
][2];
814 rgbaCopy
[i
][3] = rgbaIn
[i
][3];
817 rgba
= (GLfloat (*)[4]) rgbaCopy
;
820 if (transferOps
& IMAGE_SCALE_BIAS_BIT
) {
821 _mesa_scale_and_bias_rgba(ctx
, n
, rgba
,
822 ctx
->Pixel
.RedScale
, ctx
->Pixel
.GreenScale
,
823 ctx
->Pixel
.BlueScale
, ctx
->Pixel
.AlphaScale
,
824 ctx
->Pixel
.RedBias
, ctx
->Pixel
.GreenBias
,
825 ctx
->Pixel
.BlueBias
, ctx
->Pixel
.AlphaBias
);
827 /* color map lookup */
828 if (transferOps
& IMAGE_MAP_COLOR_BIT
) {
829 _mesa_map_rgba( ctx
, n
, rgba
);
831 /* GL_COLOR_TABLE lookup */
832 if (transferOps
& IMAGE_COLOR_TABLE_BIT
) {
833 _mesa_lookup_rgba(&ctx
->ColorTable
, n
, rgba
);
836 if (transferOps
& IMAGE_CONVOLUTION_BIT
) {
837 /* this has to be done in the calling code */
839 /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
840 if (transferOps
& IMAGE_POST_CONVOLUTION_SCALE_BIAS
) {
841 _mesa_scale_and_bias_rgba(ctx
, n
, rgba
,
842 ctx
->Pixel
.PostConvolutionScale
[RCOMP
],
843 ctx
->Pixel
.PostConvolutionScale
[GCOMP
],
844 ctx
->Pixel
.PostConvolutionScale
[BCOMP
],
845 ctx
->Pixel
.PostConvolutionScale
[ACOMP
],
846 ctx
->Pixel
.PostConvolutionBias
[RCOMP
],
847 ctx
->Pixel
.PostConvolutionBias
[GCOMP
],
848 ctx
->Pixel
.PostConvolutionBias
[BCOMP
],
849 ctx
->Pixel
.PostConvolutionBias
[ACOMP
]);
851 /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
852 if (transferOps
& IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT
) {
853 _mesa_lookup_rgba(&ctx
->PostConvolutionColorTable
, n
, rgba
);
855 /* color matrix transform */
856 if (transferOps
& IMAGE_COLOR_MATRIX_BIT
) {
857 _mesa_transform_rgba(ctx
, n
, rgba
);
859 /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
860 if (transferOps
& IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT
) {
861 _mesa_lookup_rgba(&ctx
->PostColorMatrixColorTable
, n
, rgba
);
863 /* update histogram count */
864 if (transferOps
& IMAGE_HISTOGRAM_BIT
) {
865 _mesa_update_histogram(ctx
, n
, (CONST
GLfloat (*)[4]) rgba
);
868 if (transferOps
& IMAGE_MIN_MAX_BIT
) {
869 _mesa_update_minmax(ctx
, n
, (CONST
GLfloat (*)[4]) rgba
);
870 if (ctx
->MinMax
.Sink
)
875 /* use incoming data, not a copy */
876 rgba
= (GLfloat (*)[4]) rgbaIn
;
879 /* XXX clamp rgba to [0,1]? */
882 if (dstFormat
== GL_LUMINANCE
|| dstFormat
== GL_LUMINANCE_ALPHA
) {
883 for (i
= 0; i
< n
; i
++) {
884 GLfloat sum
= rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
885 luminance
[i
] = CLAMP(sum
, 0.0F
, 1.0F
);
890 * Pack/store the pixels. Ugh! Lots of cases!!!
893 case GL_UNSIGNED_BYTE
:
895 GLubyte
*dst
= (GLubyte
*) dstAddr
;
899 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
903 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
907 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
911 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
915 dst
[i
] = FLOAT_TO_UBYTE(luminance
[i
]);
917 case GL_LUMINANCE_ALPHA
:
919 dst
[i
*2+0] = FLOAT_TO_UBYTE(luminance
[i
]);
920 dst
[i
*2+1] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
925 dst
[i
*3+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
926 dst
[i
*3+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
927 dst
[i
*3+2] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
932 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
933 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
934 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
935 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
940 dst
[i
*3+0] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
941 dst
[i
*3+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
942 dst
[i
*3+2] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
947 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
948 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
949 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
950 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
955 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
956 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
957 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
958 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
962 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
968 GLbyte
*dst
= (GLbyte
*) dstAddr
;
972 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
976 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
980 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
984 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
988 dst
[i
] = FLOAT_TO_BYTE(luminance
[i
]);
990 case GL_LUMINANCE_ALPHA
:
992 dst
[i
*2+0] = FLOAT_TO_BYTE(luminance
[i
]);
993 dst
[i
*2+1] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
998 dst
[i
*3+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
999 dst
[i
*3+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
1000 dst
[i
*3+2] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
1005 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
1006 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
1007 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
1008 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
1013 dst
[i
*3+0] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
1014 dst
[i
*3+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
1015 dst
[i
*3+2] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
1020 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
1021 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
1022 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
1023 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
1027 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
1028 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
1029 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
1030 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
1034 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
1038 case GL_UNSIGNED_SHORT
:
1040 GLushort
*dst
= (GLushort
*) dstAddr
;
1041 switch (dstFormat
) {
1044 dst
[i
] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
1048 dst
[i
] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
1052 dst
[i
] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
1056 dst
[i
] = FLOAT_TO_USHORT(rgba
[i
][ACOMP
]);
1060 dst
[i
] = FLOAT_TO_USHORT(luminance
[i
]);
1062 case GL_LUMINANCE_ALPHA
:
1064 dst
[i
*2+0] = FLOAT_TO_USHORT(luminance
[i
]);
1065 dst
[i
*2+1] = FLOAT_TO_USHORT(rgba
[i
][ACOMP
]);
1070 dst
[i
*3+0] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
1071 dst
[i
*3+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
1072 dst
[i
*3+2] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
1077 dst
[i
*4+0] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
1078 dst
[i
*4+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
1079 dst
[i
*4+2] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
1080 dst
[i
*4+3] = FLOAT_TO_USHORT(rgba
[i
][ACOMP
]);
1085 dst
[i
*3+0] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
1086 dst
[i
*3+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
1087 dst
[i
*3+2] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
1092 dst
[i
*4+0] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
1093 dst
[i
*4+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
1094 dst
[i
*4+2] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
1095 dst
[i
*4+3] = FLOAT_TO_USHORT(rgba
[i
][ACOMP
]);
1100 dst
[i
*4+0] = FLOAT_TO_USHORT(rgba
[i
][ACOMP
]);
1101 dst
[i
*4+1] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
1102 dst
[i
*4+2] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
1103 dst
[i
*4+3] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
1107 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
1109 if (dstPacking
->SwapBytes
) {
1110 _mesa_swap2( (GLushort
*) dst
, n
* comps
);
1116 GLshort
*dst
= (GLshort
*) dstAddr
;
1117 switch (dstFormat
) {
1120 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
1124 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
1128 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
1132 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
1136 dst
[i
] = FLOAT_TO_SHORT(luminance
[i
]);
1138 case GL_LUMINANCE_ALPHA
:
1140 dst
[i
*2+0] = FLOAT_TO_SHORT(luminance
[i
]);
1141 dst
[i
*2+1] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
1146 dst
[i
*3+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
1147 dst
[i
*3+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
1148 dst
[i
*3+2] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
1153 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
1154 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
1155 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
1156 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
1161 dst
[i
*3+0] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
1162 dst
[i
*3+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
1163 dst
[i
*3+2] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
1168 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
1169 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
1170 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
1171 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
1175 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
1176 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
1177 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
1178 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
1182 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
1184 if (dstPacking
->SwapBytes
) {
1185 _mesa_swap2( (GLushort
*) dst
, n
* comps
);
1189 case GL_UNSIGNED_INT
:
1191 GLuint
*dst
= (GLuint
*) dstAddr
;
1192 switch (dstFormat
) {
1195 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1199 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1203 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1207 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
1211 dst
[i
] = FLOAT_TO_UINT(luminance
[i
]);
1213 case GL_LUMINANCE_ALPHA
:
1215 dst
[i
*2+0] = FLOAT_TO_UINT(luminance
[i
]);
1216 dst
[i
*2+1] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
1221 dst
[i
*3+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1222 dst
[i
*3+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1223 dst
[i
*3+2] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1228 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1229 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1230 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1231 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
1236 dst
[i
*3+0] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1237 dst
[i
*3+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1238 dst
[i
*3+2] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1243 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1244 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1245 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1246 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
1251 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
1252 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1253 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1254 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1258 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
1260 if (dstPacking
->SwapBytes
) {
1261 _mesa_swap4( (GLuint
*) dst
, n
* comps
);
1267 GLint
*dst
= (GLint
*) dstAddr
;
1268 switch (dstFormat
) {
1271 dst
[i
] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1275 dst
[i
] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1279 dst
[i
] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1283 dst
[i
] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
1287 dst
[i
] = FLOAT_TO_INT(luminance
[i
]);
1289 case GL_LUMINANCE_ALPHA
:
1291 dst
[i
*2+0] = FLOAT_TO_INT(luminance
[i
]);
1292 dst
[i
*2+1] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
1297 dst
[i
*3+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1298 dst
[i
*3+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1299 dst
[i
*3+2] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1304 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1305 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1306 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1307 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
1312 dst
[i
*3+0] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1313 dst
[i
*3+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1314 dst
[i
*3+2] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1319 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1320 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1321 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1322 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
1327 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
1328 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1329 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1330 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1334 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
1336 if (dstPacking
->SwapBytes
) {
1337 _mesa_swap4( (GLuint
*) dst
, n
* comps
);
1343 GLfloat
*dst
= (GLfloat
*) dstAddr
;
1344 switch (dstFormat
) {
1347 dst
[i
] = rgba
[i
][RCOMP
];
1351 dst
[i
] = rgba
[i
][GCOMP
];
1355 dst
[i
] = rgba
[i
][BCOMP
];
1359 dst
[i
] = rgba
[i
][ACOMP
];
1363 dst
[i
] = luminance
[i
];
1365 case GL_LUMINANCE_ALPHA
:
1367 dst
[i
*2+0] = luminance
[i
];
1368 dst
[i
*2+1] = rgba
[i
][ACOMP
];
1373 dst
[i
*3+0] = rgba
[i
][RCOMP
];
1374 dst
[i
*3+1] = rgba
[i
][GCOMP
];
1375 dst
[i
*3+2] = rgba
[i
][BCOMP
];
1380 dst
[i
*4+0] = rgba
[i
][RCOMP
];
1381 dst
[i
*4+1] = rgba
[i
][GCOMP
];
1382 dst
[i
*4+2] = rgba
[i
][BCOMP
];
1383 dst
[i
*4+3] = rgba
[i
][ACOMP
];
1388 dst
[i
*3+0] = rgba
[i
][BCOMP
];
1389 dst
[i
*3+1] = rgba
[i
][GCOMP
];
1390 dst
[i
*3+2] = rgba
[i
][RCOMP
];
1395 dst
[i
*4+0] = rgba
[i
][BCOMP
];
1396 dst
[i
*4+1] = rgba
[i
][GCOMP
];
1397 dst
[i
*4+2] = rgba
[i
][RCOMP
];
1398 dst
[i
*4+3] = rgba
[i
][ACOMP
];
1403 dst
[i
*4+0] = rgba
[i
][ACOMP
];
1404 dst
[i
*4+1] = rgba
[i
][BCOMP
];
1405 dst
[i
*4+2] = rgba
[i
][GCOMP
];
1406 dst
[i
*4+3] = rgba
[i
][RCOMP
];
1410 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
1412 if (dstPacking
->SwapBytes
) {
1413 _mesa_swap4( (GLuint
*) dst
, n
* comps
);
1417 case GL_UNSIGNED_BYTE_3_3_2
:
1418 if (dstFormat
== GL_RGB
) {
1419 GLubyte
*dst
= (GLubyte
*) dstAddr
;
1421 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 7.0F
)) << 5)
1422 | (((GLint
) (rgba
[i
][GCOMP
] * 7.0F
)) << 2)
1423 | (((GLint
) (rgba
[i
][BCOMP
] * 3.0F
)) );
1427 case GL_UNSIGNED_BYTE_2_3_3_REV
:
1428 if (dstFormat
== GL_RGB
) {
1429 GLubyte
*dst
= (GLubyte
*) dstAddr
;
1431 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 7.0F
)) )
1432 | (((GLint
) (rgba
[i
][GCOMP
] * 7.0F
)) << 3)
1433 | (((GLint
) (rgba
[i
][BCOMP
] * 3.0F
)) << 5);
1437 case GL_UNSIGNED_SHORT_5_6_5
:
1438 if (dstFormat
== GL_RGB
) {
1439 GLushort
*dst
= (GLushort
*) dstAddr
;
1441 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 31.0F
)) << 11)
1442 | (((GLint
) (rgba
[i
][GCOMP
] * 63.0F
)) << 5)
1443 | (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) );
1447 case GL_UNSIGNED_SHORT_5_6_5_REV
:
1448 if (dstFormat
== GL_RGB
) {
1449 GLushort
*dst
= (GLushort
*) dstAddr
;
1451 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 31.0F
)) )
1452 | (((GLint
) (rgba
[i
][GCOMP
] * 63.0F
)) << 5)
1453 | (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) << 11);
1457 case GL_UNSIGNED_SHORT_4_4_4_4
:
1458 if (dstFormat
== GL_RGBA
) {
1459 GLushort
*dst
= (GLushort
*) dstAddr
;
1461 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 15.0F
)) << 12)
1462 | (((GLint
) (rgba
[i
][GCOMP
] * 15.0F
)) << 8)
1463 | (((GLint
) (rgba
[i
][BCOMP
] * 15.0F
)) << 4)
1464 | (((GLint
) (rgba
[i
][ACOMP
] * 15.0F
)) );
1467 else if (dstFormat
== GL_BGRA
) {
1468 GLushort
*dst
= (GLushort
*) dstAddr
;
1470 dst
[i
] = (((GLint
) (rgba
[i
][BCOMP
] * 15.0F
)) << 12)
1471 | (((GLint
) (rgba
[i
][GCOMP
] * 15.0F
)) << 8)
1472 | (((GLint
) (rgba
[i
][RCOMP
] * 15.0F
)) << 4)
1473 | (((GLint
) (rgba
[i
][ACOMP
] * 15.0F
)) );
1476 else if (dstFormat
== GL_ABGR_EXT
) {
1477 GLushort
*dst
= (GLushort
*) dstAddr
;
1479 dst
[i
] = (((GLint
) (rgba
[i
][ACOMP
] * 15.0F
)) << 4)
1480 | (((GLint
) (rgba
[i
][BCOMP
] * 15.0F
)) << 8)
1481 | (((GLint
) (rgba
[i
][GCOMP
] * 15.0F
)) << 12)
1482 | (((GLint
) (rgba
[i
][RCOMP
] * 15.0F
)) );
1486 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
1487 if (dstFormat
== GL_RGBA
) {
1488 GLushort
*dst
= (GLushort
*) dstAddr
;
1490 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 15.0F
)) )
1491 | (((GLint
) (rgba
[i
][GCOMP
] * 15.0F
)) << 4)
1492 | (((GLint
) (rgba
[i
][BCOMP
] * 15.0F
)) << 8)
1493 | (((GLint
) (rgba
[i
][ACOMP
] * 15.0F
)) << 12);
1496 else if (dstFormat
== GL_BGRA
) {
1497 GLushort
*dst
= (GLushort
*) dstAddr
;
1499 dst
[i
] = (((GLint
) (rgba
[i
][BCOMP
] * 15.0F
)) )
1500 | (((GLint
) (rgba
[i
][GCOMP
] * 15.0F
)) << 4)
1501 | (((GLint
) (rgba
[i
][RCOMP
] * 15.0F
)) << 8)
1502 | (((GLint
) (rgba
[i
][ACOMP
] * 15.0F
)) << 12);
1505 else if (dstFormat
== GL_ABGR_EXT
) {
1506 GLushort
*dst
= (GLushort
*) dstAddr
;
1508 dst
[i
] = (((GLint
) (rgba
[i
][ACOMP
] * 15.0F
)) )
1509 | (((GLint
) (rgba
[i
][BCOMP
] * 15.0F
)) << 4)
1510 | (((GLint
) (rgba
[i
][GCOMP
] * 15.0F
)) << 8)
1511 | (((GLint
) (rgba
[i
][RCOMP
] * 15.0F
)) << 12);
1515 case GL_UNSIGNED_SHORT_5_5_5_1
:
1516 if (dstFormat
== GL_RGBA
) {
1517 GLushort
*dst
= (GLushort
*) dstAddr
;
1519 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 31.0F
)) << 11)
1520 | (((GLint
) (rgba
[i
][GCOMP
] * 31.0F
)) << 6)
1521 | (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) << 1)
1522 | (((GLint
) (rgba
[i
][ACOMP
] * 1.0F
)) );
1525 else if (dstFormat
== GL_BGRA
) {
1526 GLushort
*dst
= (GLushort
*) dstAddr
;
1528 dst
[i
] = (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) << 11)
1529 | (((GLint
) (rgba
[i
][GCOMP
] * 31.0F
)) << 6)
1530 | (((GLint
) (rgba
[i
][RCOMP
] * 31.0F
)) << 1)
1531 | (((GLint
) (rgba
[i
][ACOMP
] * 1.0F
)) );
1534 else if (dstFormat
== GL_ABGR_EXT
) {
1535 GLushort
*dst
= (GLushort
*) dstAddr
;
1537 dst
[i
] = (((GLint
) (rgba
[i
][ACOMP
] * 31.0F
)) << 11)
1538 | (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) << 6)
1539 | (((GLint
) (rgba
[i
][GCOMP
] * 31.0F
)) << 1)
1540 | (((GLint
) (rgba
[i
][RCOMP
] * 1.0F
)) );
1544 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
1545 if (dstFormat
== GL_RGBA
) {
1546 GLushort
*dst
= (GLushort
*) dstAddr
;
1548 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 31.0F
)) )
1549 | (((GLint
) (rgba
[i
][GCOMP
] * 31.0F
)) << 5)
1550 | (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) << 10)
1551 | (((GLint
) (rgba
[i
][ACOMP
] * 1.0F
)) << 15);
1554 else if (dstFormat
== GL_BGRA
) {
1555 GLushort
*dst
= (GLushort
*) dstAddr
;
1557 dst
[i
] = (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) )
1558 | (((GLint
) (rgba
[i
][GCOMP
] * 31.0F
)) << 5)
1559 | (((GLint
) (rgba
[i
][RCOMP
] * 31.0F
)) << 10)
1560 | (((GLint
) (rgba
[i
][ACOMP
] * 1.0F
)) << 15);
1563 else if (dstFormat
== GL_ABGR_EXT
) {
1564 GLushort
*dst
= (GLushort
*) dstAddr
;
1566 dst
[i
] = (((GLint
) (rgba
[i
][ACOMP
] * 31.0F
)) )
1567 | (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) << 5)
1568 | (((GLint
) (rgba
[i
][GCOMP
] * 31.0F
)) << 10)
1569 | (((GLint
) (rgba
[i
][RCOMP
] * 1.0F
)) << 15);
1573 case GL_UNSIGNED_INT_8_8_8_8
:
1574 if (dstFormat
== GL_RGBA
) {
1575 GLuint
*dst
= (GLuint
*) dstAddr
;
1577 dst
[i
] = (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) << 24)
1578 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 16)
1579 | (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) << 8)
1580 | (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) );
1583 else if (dstFormat
== GL_BGRA
) {
1584 GLuint
*dst
= (GLuint
*) dstAddr
;
1586 dst
[i
] = (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) << 24)
1587 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 16)
1588 | (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) << 8)
1589 | (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) );
1592 else if (dstFormat
== GL_ABGR_EXT
) {
1593 GLuint
*dst
= (GLuint
*) dstAddr
;
1595 dst
[i
] = (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) << 24)
1596 | (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) << 16)
1597 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 8)
1598 | (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) );
1602 case GL_UNSIGNED_INT_8_8_8_8_REV
:
1603 if (dstFormat
== GL_RGBA
) {
1604 GLuint
*dst
= (GLuint
*) dstAddr
;
1606 dst
[i
] = (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) )
1607 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 8)
1608 | (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) << 16)
1609 | (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) << 24);
1612 else if (dstFormat
== GL_BGRA
) {
1613 GLuint
*dst
= (GLuint
*) dstAddr
;
1615 dst
[i
] = (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) )
1616 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 8)
1617 | (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) << 16)
1618 | (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) << 24);
1621 else if (dstFormat
== GL_ABGR_EXT
) {
1622 GLuint
*dst
= (GLuint
*) dstAddr
;
1624 dst
[i
] = (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) )
1625 | (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) << 8)
1626 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 16)
1627 | (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) << 24);
1631 case GL_UNSIGNED_INT_10_10_10_2
:
1632 if (dstFormat
== GL_RGBA
) {
1633 GLuint
*dst
= (GLuint
*) dstAddr
;
1635 dst
[i
] = (((GLuint
) (rgba
[i
][RCOMP
] * 1023.0F
)) << 22)
1636 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 12)
1637 | (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) << 2)
1638 | (((GLuint
) (rgba
[i
][ACOMP
] * 3.0F
)) );
1641 else if (dstFormat
== GL_BGRA
) {
1642 GLuint
*dst
= (GLuint
*) dstAddr
;
1644 dst
[i
] = (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) << 22)
1645 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 12)
1646 | (((GLuint
) (rgba
[i
][RCOMP
] * 1023.0F
)) << 2)
1647 | (((GLuint
) (rgba
[i
][ACOMP
] * 3.0F
)) );
1650 else if (dstFormat
== GL_ABGR_EXT
) {
1651 GLuint
*dst
= (GLuint
*) dstAddr
;
1653 dst
[i
] = (((GLuint
) (rgba
[i
][ACOMP
] * 1023.0F
)) << 22)
1654 | (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) << 12)
1655 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 2)
1656 | (((GLuint
) (rgba
[i
][RCOMP
] * 3.0F
)) );
1660 case GL_UNSIGNED_INT_2_10_10_10_REV
:
1661 if (dstFormat
== GL_RGBA
) {
1662 GLuint
*dst
= (GLuint
*) dstAddr
;
1664 dst
[i
] = (((GLuint
) (rgba
[i
][RCOMP
] * 1023.0F
)) )
1665 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 10)
1666 | (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) << 20)
1667 | (((GLuint
) (rgba
[i
][ACOMP
] * 3.0F
)) << 30);
1670 else if (dstFormat
== GL_BGRA
) {
1671 GLuint
*dst
= (GLuint
*) dstAddr
;
1673 dst
[i
] = (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) )
1674 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 10)
1675 | (((GLuint
) (rgba
[i
][RCOMP
] * 1023.0F
)) << 20)
1676 | (((GLuint
) (rgba
[i
][ACOMP
] * 3.0F
)) << 30);
1679 else if (dstFormat
== GL_ABGR_EXT
) {
1680 GLuint
*dst
= (GLuint
*) dstAddr
;
1682 dst
[i
] = (((GLuint
) (rgba
[i
][ACOMP
] * 1023.0F
)) )
1683 | (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) << 10)
1684 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 20)
1685 | (((GLuint
) (rgba
[i
][RCOMP
] * 3.0F
)) << 30);
1690 gl_problem(ctx
, "bad type in _mesa_pack_float_rgba_span");
1697 * Pack the given RGBA span into client memory at 'dest' address
1698 * in the given pixel format and type.
1699 * Optionally apply the enabled pixel transfer ops.
1700 * Pack into memory using the given packing params struct.
1701 * This is used by glReadPixels and glGetTexImage?D()
1702 * Input: ctx - the context
1703 * n - number of pixels in the span
1705 * format - dest packing format
1706 * type - dest packing datatype
1707 * destination - destination packing address
1708 * packing - pixel packing parameters
1709 * transferOps - bitmask of IMAGE_*_BIT operations to apply
1712 _mesa_pack_rgba_span( GLcontext
*ctx
,
1713 GLuint n
, CONST GLchan srcRgba
[][4],
1714 GLenum dstFormat
, GLenum dstType
,
1716 const struct gl_pixelstore_attrib
*dstPacking
,
1719 ASSERT((ctx
->NewState
& _NEW_PIXEL
) == 0);
1721 /* Test for optimized case first */
1722 if (transferOps
== 0 && dstFormat
== GL_RGBA
&& dstType
== CHAN_TYPE
) {
1723 /* common simple case */
1724 MEMCPY(dstAddr
, srcRgba
, n
* 4 * sizeof(GLchan
));
1726 else if (transferOps
== 0 && dstFormat
== GL_RGB
&& dstType
== CHAN_TYPE
) {
1727 /* common simple case */
1729 GLchan
*dest
= (GLchan
*) dstAddr
;
1730 for (i
= 0; i
< n
; i
++) {
1731 dest
[0] = srcRgba
[i
][RCOMP
];
1732 dest
[1] = srcRgba
[i
][GCOMP
];
1733 dest
[2] = srcRgba
[i
][BCOMP
];
1738 /* general solution */
1739 GLfloat rgba
[MAX_WIDTH
][4];
1741 assert(n
<= MAX_WIDTH
);
1742 /* convert color components to floating point */
1744 rgba
[i
][RCOMP
] = CHAN_TO_FLOAT(srcRgba
[i
][RCOMP
]);
1745 rgba
[i
][GCOMP
] = CHAN_TO_FLOAT(srcRgba
[i
][GCOMP
]);
1746 rgba
[i
][BCOMP
] = CHAN_TO_FLOAT(srcRgba
[i
][BCOMP
]);
1747 rgba
[i
][ACOMP
] = CHAN_TO_FLOAT(srcRgba
[i
][ACOMP
]);
1749 _mesa_pack_float_rgba_span(ctx
, n
, (const GLfloat (*)[4]) rgba
,
1750 dstFormat
, dstType
, dstAddr
,
1751 dstPacking
, transferOps
);
1756 #define SWAP2BYTE(VALUE) \
1758 GLubyte *bytes = (GLubyte *) &(VALUE); \
1759 GLubyte tmp = bytes[0]; \
1760 bytes[0] = bytes[1]; \
1764 #define SWAP4BYTE(VALUE) \
1766 GLubyte *bytes = (GLubyte *) &(VALUE); \
1767 GLubyte tmp = bytes[0]; \
1768 bytes[0] = bytes[3]; \
1771 bytes[1] = bytes[2]; \
1777 extract_uint_indexes(GLuint n
, GLuint indexes
[],
1778 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
1779 const struct gl_pixelstore_attrib
*unpack
)
1781 assert(srcFormat
== GL_COLOR_INDEX
);
1783 ASSERT(srcType
== GL_BITMAP
||
1784 srcType
== GL_UNSIGNED_BYTE
||
1785 srcType
== GL_BYTE
||
1786 srcType
== GL_UNSIGNED_SHORT
||
1787 srcType
== GL_SHORT
||
1788 srcType
== GL_UNSIGNED_INT
||
1789 srcType
== GL_INT
||
1790 srcType
== GL_FLOAT
);
1795 GLubyte
*ubsrc
= (GLubyte
*) src
;
1796 if (unpack
->LsbFirst
) {
1797 GLubyte mask
= 1 << (unpack
->SkipPixels
& 0x7);
1799 for (i
= 0; i
< n
; i
++) {
1800 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
1811 GLubyte mask
= 128 >> (unpack
->SkipPixels
& 0x7);
1813 for (i
= 0; i
< n
; i
++) {
1814 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
1826 case GL_UNSIGNED_BYTE
:
1829 const GLubyte
*s
= (const GLubyte
*) src
;
1830 for (i
= 0; i
< n
; i
++)
1837 const GLbyte
*s
= (const GLbyte
*) src
;
1838 for (i
= 0; i
< n
; i
++)
1842 case GL_UNSIGNED_SHORT
:
1845 const GLushort
*s
= (const GLushort
*) src
;
1846 if (unpack
->SwapBytes
) {
1847 for (i
= 0; i
< n
; i
++) {
1848 GLushort value
= s
[i
];
1854 for (i
= 0; i
< n
; i
++)
1862 const GLshort
*s
= (const GLshort
*) src
;
1863 if (unpack
->SwapBytes
) {
1864 for (i
= 0; i
< n
; i
++) {
1865 GLshort value
= s
[i
];
1871 for (i
= 0; i
< n
; i
++)
1876 case GL_UNSIGNED_INT
:
1879 const GLuint
*s
= (const GLuint
*) src
;
1880 if (unpack
->SwapBytes
) {
1881 for (i
= 0; i
< n
; i
++) {
1882 GLuint value
= s
[i
];
1888 for (i
= 0; i
< n
; i
++)
1896 const GLint
*s
= (const GLint
*) src
;
1897 if (unpack
->SwapBytes
) {
1898 for (i
= 0; i
< n
; i
++) {
1905 for (i
= 0; i
< n
; i
++)
1913 const GLfloat
*s
= (const GLfloat
*) src
;
1914 if (unpack
->SwapBytes
) {
1915 for (i
= 0; i
< n
; i
++) {
1916 GLfloat value
= s
[i
];
1918 indexes
[i
] = (GLuint
) value
;
1922 for (i
= 0; i
< n
; i
++)
1923 indexes
[i
] = (GLuint
) s
[i
];
1928 gl_problem(NULL
, "bad srcType in extract_uint_indexes");
1936 * This function extracts floating point RGBA values from arbitrary
1937 * image data. srcFormat and srcType are the format and type parameters
1938 * passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
1940 * Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
1941 * implements the "Conversion to floating point", "Conversion to RGB",
1942 * and "Final Expansion to RGBA" operations.
1944 * Args: n - number of pixels
1945 * rgba - output colors
1946 * srcFormat - format of incoming data
1947 * srcType - datatype of incoming data
1948 * src - source data pointer
1949 * swapBytes - perform byteswapping of incoming data?
1952 extract_float_rgba(GLuint n
, GLfloat rgba
[][4],
1953 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
1954 GLboolean swapBytes
)
1956 GLint redIndex
, greenIndex
, blueIndex
, alphaIndex
;
1958 GLint rComp
, bComp
, gComp
, aComp
;
1960 ASSERT(srcFormat
== GL_RED
||
1961 srcFormat
== GL_GREEN
||
1962 srcFormat
== GL_BLUE
||
1963 srcFormat
== GL_ALPHA
||
1964 srcFormat
== GL_LUMINANCE
||
1965 srcFormat
== GL_LUMINANCE_ALPHA
||
1966 srcFormat
== GL_INTENSITY
||
1967 srcFormat
== GL_RGB
||
1968 srcFormat
== GL_BGR
||
1969 srcFormat
== GL_RGBA
||
1970 srcFormat
== GL_BGRA
||
1971 srcFormat
== GL_ABGR_EXT
);
1973 ASSERT(srcType
== GL_UNSIGNED_BYTE
||
1974 srcType
== GL_BYTE
||
1975 srcType
== GL_UNSIGNED_SHORT
||
1976 srcType
== GL_SHORT
||
1977 srcType
== GL_UNSIGNED_INT
||
1978 srcType
== GL_INT
||
1979 srcType
== GL_FLOAT
||
1980 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
1981 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
1982 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
1983 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
1984 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
1985 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
1986 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
1987 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
1988 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
1989 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
1990 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
1991 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
1993 rComp
= gComp
= bComp
= aComp
= -1;
1995 switch (srcFormat
) {
1998 greenIndex
= blueIndex
= alphaIndex
= -1;
2003 redIndex
= blueIndex
= alphaIndex
= -1;
2008 redIndex
= greenIndex
= alphaIndex
= -1;
2012 redIndex
= greenIndex
= blueIndex
= -1;
2017 redIndex
= greenIndex
= blueIndex
= 0;
2021 case GL_LUMINANCE_ALPHA
:
2022 redIndex
= greenIndex
= blueIndex
= 0;
2028 greenIndex
= blueIndex
= alphaIndex
= -1;
2079 gl_problem(NULL
, "bad srcFormat in extract float data");
2084 #define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION) \
2085 if ((INDEX) < 0) { \
2087 for (i = 0; i < n; i++) { \
2088 rgba[i][CHANNEL] = DEFAULT; \
2091 else if (swapBytes) { \
2092 const TYPE *s = (const TYPE *) src; \
2094 for (i = 0; i < n; i++) { \
2095 TYPE value = s[INDEX]; \
2096 if (sizeof(TYPE) == 2) { \
2099 else if (sizeof(TYPE) == 4) { \
2102 rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
2107 const TYPE *s = (const TYPE *) src; \
2109 for (i = 0; i < n; i++) { \
2110 rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
2116 case GL_UNSIGNED_BYTE
:
2117 PROCESS(redIndex
, RCOMP
, 0.0F
, GLubyte
, UBYTE_TO_FLOAT
);
2118 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLubyte
, UBYTE_TO_FLOAT
);
2119 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLubyte
, UBYTE_TO_FLOAT
);
2120 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLubyte
, UBYTE_TO_FLOAT
);
2123 PROCESS(redIndex
, RCOMP
, 0.0F
, GLbyte
, BYTE_TO_FLOAT
);
2124 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLbyte
, BYTE_TO_FLOAT
);
2125 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLbyte
, BYTE_TO_FLOAT
);
2126 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLbyte
, BYTE_TO_FLOAT
);
2128 case GL_UNSIGNED_SHORT
:
2129 PROCESS(redIndex
, RCOMP
, 0.0F
, GLushort
, USHORT_TO_FLOAT
);
2130 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLushort
, USHORT_TO_FLOAT
);
2131 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLushort
, USHORT_TO_FLOAT
);
2132 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLushort
, USHORT_TO_FLOAT
);
2135 PROCESS(redIndex
, RCOMP
, 0.0F
, GLshort
, SHORT_TO_FLOAT
);
2136 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLshort
, SHORT_TO_FLOAT
);
2137 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLshort
, SHORT_TO_FLOAT
);
2138 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLshort
, SHORT_TO_FLOAT
);
2140 case GL_UNSIGNED_INT
:
2141 PROCESS(redIndex
, RCOMP
, 0.0F
, GLuint
, UINT_TO_FLOAT
);
2142 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLuint
, UINT_TO_FLOAT
);
2143 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLuint
, UINT_TO_FLOAT
);
2144 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLuint
, UINT_TO_FLOAT
);
2147 PROCESS(redIndex
, RCOMP
, 0.0F
, GLint
, INT_TO_FLOAT
);
2148 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLint
, INT_TO_FLOAT
);
2149 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLint
, INT_TO_FLOAT
);
2150 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLint
, INT_TO_FLOAT
);
2153 PROCESS(redIndex
, RCOMP
, 0.0F
, GLfloat
, (GLfloat
));
2154 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLfloat
, (GLfloat
));
2155 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLfloat
, (GLfloat
));
2156 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLfloat
, (GLfloat
));
2158 case GL_UNSIGNED_BYTE_3_3_2
:
2160 const GLubyte
*ubsrc
= (const GLubyte
*) src
;
2162 for (i
= 0; i
< n
; i
++) {
2163 GLubyte p
= ubsrc
[i
];
2164 rgba
[i
][RCOMP
] = ((p
>> 5) ) * (1.0F
/ 7.0F
);
2165 rgba
[i
][GCOMP
] = ((p
>> 2) & 0x7) * (1.0F
/ 7.0F
);
2166 rgba
[i
][BCOMP
] = ((p
) & 0x3) * (1.0F
/ 3.0F
);
2167 rgba
[i
][ACOMP
] = 1.0F
;
2171 case GL_UNSIGNED_BYTE_2_3_3_REV
:
2173 const GLubyte
*ubsrc
= (const GLubyte
*) src
;
2175 for (i
= 0; i
< n
; i
++) {
2176 GLubyte p
= ubsrc
[i
];
2177 rgba
[i
][RCOMP
] = ((p
) & 0x7) * (1.0F
/ 7.0F
);
2178 rgba
[i
][GCOMP
] = ((p
>> 3) & 0x7) * (1.0F
/ 7.0F
);
2179 rgba
[i
][BCOMP
] = ((p
>> 6) ) * (1.0F
/ 3.0F
);
2180 rgba
[i
][ACOMP
] = 1.0F
;
2184 case GL_UNSIGNED_SHORT_5_6_5
:
2186 const GLushort
*ussrc
= (const GLushort
*) src
;
2188 for (i
= 0; i
< n
; i
++) {
2189 GLushort p
= ussrc
[i
];
2191 rgba
[i
][RCOMP
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
2192 rgba
[i
][GCOMP
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
2193 rgba
[i
][BCOMP
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
2194 rgba
[i
][ACOMP
] = 1.0F
;
2198 const GLushort
*ussrc
= (const GLushort
*) src
;
2200 for (i
= 0; i
< n
; i
++) {
2201 GLushort p
= ussrc
[i
];
2202 rgba
[i
][RCOMP
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
2203 rgba
[i
][GCOMP
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
2204 rgba
[i
][BCOMP
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
2205 rgba
[i
][ACOMP
] = 1.0F
;
2209 case GL_UNSIGNED_SHORT_5_6_5_REV
:
2211 const GLushort
*ussrc
= (const GLushort
*) src
;
2213 for (i
= 0; i
< n
; i
++) {
2214 GLushort p
= ussrc
[i
];
2216 rgba
[i
][RCOMP
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
2217 rgba
[i
][GCOMP
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
2218 rgba
[i
][BCOMP
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
2219 rgba
[i
][ACOMP
] = 1.0F
;
2223 const GLushort
*ussrc
= (const GLushort
*) src
;
2225 for (i
= 0; i
< n
; i
++) {
2226 GLushort p
= ussrc
[i
];
2227 rgba
[i
][RCOMP
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
2228 rgba
[i
][GCOMP
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
2229 rgba
[i
][BCOMP
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
2230 rgba
[i
][ACOMP
] = 1.0F
;
2234 case GL_UNSIGNED_SHORT_4_4_4_4
:
2236 const GLushort
*ussrc
= (const GLushort
*) src
;
2238 for (i
= 0; i
< n
; i
++) {
2239 GLushort p
= ussrc
[i
];
2241 rgba
[i
][rComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
2242 rgba
[i
][gComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
2243 rgba
[i
][bComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
2244 rgba
[i
][aComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
2248 const GLushort
*ussrc
= (const GLushort
*) src
;
2250 for (i
= 0; i
< n
; i
++) {
2251 GLushort p
= ussrc
[i
];
2252 rgba
[i
][rComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
2253 rgba
[i
][gComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
2254 rgba
[i
][bComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
2255 rgba
[i
][aComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
2259 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
2261 const GLushort
*ussrc
= (const GLushort
*) src
;
2263 for (i
= 0; i
< n
; i
++) {
2264 GLushort p
= ussrc
[i
];
2266 rgba
[i
][rComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
2267 rgba
[i
][gComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
2268 rgba
[i
][bComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
2269 rgba
[i
][aComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
2273 const GLushort
*ussrc
= (const GLushort
*) src
;
2275 for (i
= 0; i
< n
; i
++) {
2276 GLushort p
= ussrc
[i
];
2277 rgba
[i
][rComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
2278 rgba
[i
][gComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
2279 rgba
[i
][bComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
2280 rgba
[i
][aComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
2284 case GL_UNSIGNED_SHORT_5_5_5_1
:
2286 const GLushort
*ussrc
= (const GLushort
*) src
;
2288 for (i
= 0; i
< n
; i
++) {
2289 GLushort p
= ussrc
[i
];
2291 rgba
[i
][rComp
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
2292 rgba
[i
][gComp
] = ((p
>> 6) & 0x1f) * (1.0F
/ 31.0F
);
2293 rgba
[i
][bComp
] = ((p
>> 1) & 0x1f) * (1.0F
/ 31.0F
);
2294 rgba
[i
][aComp
] = ((p
) & 0x1) * (1.0F
/ 1.0F
);
2298 const GLushort
*ussrc
= (const GLushort
*) src
;
2300 for (i
= 0; i
< n
; i
++) {
2301 GLushort p
= ussrc
[i
];
2302 rgba
[i
][rComp
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
2303 rgba
[i
][gComp
] = ((p
>> 6) & 0x1f) * (1.0F
/ 31.0F
);
2304 rgba
[i
][bComp
] = ((p
>> 1) & 0x1f) * (1.0F
/ 31.0F
);
2305 rgba
[i
][aComp
] = ((p
) & 0x1) * (1.0F
/ 1.0F
);
2309 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
2311 const GLushort
*ussrc
= (const GLushort
*) src
;
2313 for (i
= 0; i
< n
; i
++) {
2314 GLushort p
= ussrc
[i
];
2316 rgba
[i
][rComp
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
2317 rgba
[i
][gComp
] = ((p
>> 5) & 0x1f) * (1.0F
/ 31.0F
);
2318 rgba
[i
][bComp
] = ((p
>> 10) & 0x1f) * (1.0F
/ 31.0F
);
2319 rgba
[i
][aComp
] = ((p
>> 15) ) * (1.0F
/ 1.0F
);
2323 const GLushort
*ussrc
= (const GLushort
*) src
;
2325 for (i
= 0; i
< n
; i
++) {
2326 GLushort p
= ussrc
[i
];
2327 rgba
[i
][rComp
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
2328 rgba
[i
][gComp
] = ((p
>> 5) & 0x1f) * (1.0F
/ 31.0F
);
2329 rgba
[i
][bComp
] = ((p
>> 10) & 0x1f) * (1.0F
/ 31.0F
);
2330 rgba
[i
][aComp
] = ((p
>> 15) ) * (1.0F
/ 1.0F
);
2334 case GL_UNSIGNED_INT_8_8_8_8
:
2336 const GLuint
*uisrc
= (const GLuint
*) src
;
2338 for (i
= 0; i
< n
; i
++) {
2339 GLuint p
= uisrc
[i
];
2340 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
2341 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
2342 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
2343 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
>> 24) );
2347 const GLuint
*uisrc
= (const GLuint
*) src
;
2349 for (i
= 0; i
< n
; i
++) {
2350 GLuint p
= uisrc
[i
];
2351 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
>> 24) );
2352 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
2353 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
2354 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
2358 case GL_UNSIGNED_INT_8_8_8_8_REV
:
2360 const GLuint
*uisrc
= (const GLuint
*) src
;
2362 for (i
= 0; i
< n
; i
++) {
2363 GLuint p
= uisrc
[i
];
2364 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
>> 24) );
2365 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
2366 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
2367 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
2371 const GLuint
*uisrc
= (const GLuint
*) src
;
2373 for (i
= 0; i
< n
; i
++) {
2374 GLuint p
= uisrc
[i
];
2375 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
2376 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
2377 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
2378 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
>> 24) );
2382 case GL_UNSIGNED_INT_10_10_10_2
:
2384 const GLuint
*uisrc
= (const GLuint
*) src
;
2386 for (i
= 0; i
< n
; i
++) {
2387 GLuint p
= uisrc
[i
];
2389 rgba
[i
][rComp
] = ((p
>> 22) ) * (1.0F
/ 1023.0F
);
2390 rgba
[i
][gComp
] = ((p
>> 12) & 0x3ff) * (1.0F
/ 1023.0F
);
2391 rgba
[i
][bComp
] = ((p
>> 2) & 0x3ff) * (1.0F
/ 1023.0F
);
2392 rgba
[i
][aComp
] = ((p
) & 0x3 ) * (1.0F
/ 3.0F
);
2396 const GLuint
*uisrc
= (const GLuint
*) src
;
2398 for (i
= 0; i
< n
; i
++) {
2399 GLuint p
= uisrc
[i
];
2400 rgba
[i
][rComp
] = ((p
>> 22) ) * (1.0F
/ 1023.0F
);
2401 rgba
[i
][gComp
] = ((p
>> 12) & 0x3ff) * (1.0F
/ 1023.0F
);
2402 rgba
[i
][bComp
] = ((p
>> 2) & 0x3ff) * (1.0F
/ 1023.0F
);
2403 rgba
[i
][aComp
] = ((p
) & 0x3 ) * (1.0F
/ 3.0F
);
2407 case GL_UNSIGNED_INT_2_10_10_10_REV
:
2409 const GLuint
*uisrc
= (const GLuint
*) src
;
2411 for (i
= 0; i
< n
; i
++) {
2412 GLuint p
= uisrc
[i
];
2414 rgba
[i
][rComp
] = ((p
) & 0x3ff) * (1.0F
/ 1023.0F
);
2415 rgba
[i
][gComp
] = ((p
>> 10) & 0x3ff) * (1.0F
/ 1023.0F
);
2416 rgba
[i
][bComp
] = ((p
>> 20) & 0x3ff) * (1.0F
/ 1023.0F
);
2417 rgba
[i
][aComp
] = ((p
>> 30) ) * (1.0F
/ 3.0F
);
2421 const GLuint
*uisrc
= (const GLuint
*) src
;
2423 for (i
= 0; i
< n
; i
++) {
2424 GLuint p
= uisrc
[i
];
2425 rgba
[i
][rComp
] = ((p
) & 0x3ff) * (1.0F
/ 1023.0F
);
2426 rgba
[i
][gComp
] = ((p
>> 10) & 0x3ff) * (1.0F
/ 1023.0F
);
2427 rgba
[i
][bComp
] = ((p
>> 20) & 0x3ff) * (1.0F
/ 1023.0F
);
2428 rgba
[i
][aComp
] = ((p
>> 30) ) * (1.0F
/ 3.0F
);
2433 gl_problem(NULL
, "bad srcType in extract float data");
2441 * Unpack a row of color image data from a client buffer according to
2442 * the pixel unpacking parameters.
2443 * Return GLubyte values in the specified dest image format.
2444 * This is (or will be) used by glDrawPixels and glTexImage?D().
2445 * Input: ctx - the context
2446 * n - number of pixels in the span
2447 * dstFormat - format of destination color array
2448 * dest - the destination color array
2449 * srcFormat - source image format
2450 * srcType - source image datatype
2451 * source - source image pointer
2452 * srcPacking - pixel unpacking parameters
2453 * transferOps - bitmask of IMAGE_*_BIT values of operations to apply
2455 * XXX perhaps expand this to process whole images someday.
2458 _mesa_unpack_chan_color_span( GLcontext
*ctx
,
2459 GLuint n
, GLenum dstFormat
, GLchan dest
[],
2460 GLenum srcFormat
, GLenum srcType
,
2461 const GLvoid
*source
,
2462 const struct gl_pixelstore_attrib
*srcPacking
,
2463 GLuint transferOps
)
2465 ASSERT(dstFormat
== GL_ALPHA
||
2466 dstFormat
== GL_LUMINANCE
||
2467 dstFormat
== GL_LUMINANCE_ALPHA
||
2468 dstFormat
== GL_INTENSITY
||
2469 dstFormat
== GL_RGB
||
2470 dstFormat
== GL_RGBA
||
2471 dstFormat
== GL_COLOR_INDEX
);
2473 ASSERT(srcFormat
== GL_RED
||
2474 srcFormat
== GL_GREEN
||
2475 srcFormat
== GL_BLUE
||
2476 srcFormat
== GL_ALPHA
||
2477 srcFormat
== GL_LUMINANCE
||
2478 srcFormat
== GL_LUMINANCE_ALPHA
||
2479 srcFormat
== GL_INTENSITY
||
2480 srcFormat
== GL_RGB
||
2481 srcFormat
== GL_BGR
||
2482 srcFormat
== GL_RGBA
||
2483 srcFormat
== GL_BGRA
||
2484 srcFormat
== GL_ABGR_EXT
||
2485 srcFormat
== GL_COLOR_INDEX
);
2487 ASSERT(srcType
== GL_BITMAP
||
2488 srcType
== GL_UNSIGNED_BYTE
||
2489 srcType
== GL_BYTE
||
2490 srcType
== GL_UNSIGNED_SHORT
||
2491 srcType
== GL_SHORT
||
2492 srcType
== GL_UNSIGNED_INT
||
2493 srcType
== GL_INT
||
2494 srcType
== GL_FLOAT
||
2495 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
2496 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
2497 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
2498 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
2499 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
2500 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
2501 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
2502 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
2503 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
2504 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
2505 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
2506 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
2508 /* this is intended for RGBA mode only */
2509 assert(ctx
->Visual
.rgbMode
);
2511 /* Try simple cases first */
2512 if (transferOps
== 0 && srcType
== CHAN_TYPE
) {
2513 if (dstFormat
== GL_RGBA
) {
2514 if (srcFormat
== GL_RGBA
) {
2515 MEMCPY( dest
, source
, n
* 4 * sizeof(GLchan
) );
2518 else if (srcFormat
== GL_RGB
) {
2520 const GLchan
*src
= (const GLchan
*) source
;
2522 for (i
= 0; i
< n
; i
++) {
2533 else if (dstFormat
== GL_RGB
) {
2534 if (srcFormat
== GL_RGB
) {
2535 MEMCPY( dest
, source
, n
* 3 * sizeof(GLchan
) );
2538 else if (srcFormat
== GL_RGBA
) {
2540 const GLchan
*src
= (const GLchan
*) source
;
2542 for (i
= 0; i
< n
; i
++) {
2552 else if (dstFormat
== srcFormat
) {
2553 GLint comps
= _mesa_components_in_format(srcFormat
);
2555 MEMCPY( dest
, source
, n
* comps
* sizeof(GLchan
) );
2561 /* general solution begins here */
2563 GLfloat rgba
[MAX_WIDTH
][4];
2564 GLint dstComponents
;
2565 GLint dstRedIndex
, dstGreenIndex
, dstBlueIndex
, dstAlphaIndex
;
2566 GLint dstLuminanceIndex
, dstIntensityIndex
;
2568 dstComponents
= _mesa_components_in_format( dstFormat
);
2569 /* source & dest image formats should have been error checked by now */
2570 assert(dstComponents
> 0);
2573 * Extract image data and convert to RGBA floats
2575 assert(n
<= MAX_WIDTH
);
2576 if (srcFormat
== GL_COLOR_INDEX
) {
2577 GLuint indexes
[MAX_WIDTH
];
2578 extract_uint_indexes(n
, indexes
, srcFormat
, srcType
, source
,
2581 if (dstFormat
== GL_COLOR_INDEX
2582 && (transferOps
& IMAGE_MAP_COLOR_BIT
)) {
2583 _mesa_map_ci(ctx
, n
, indexes
);
2585 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
2586 _mesa_shift_and_offset_ci(ctx
, n
, indexes
);
2589 if (dstFormat
== GL_COLOR_INDEX
) {
2590 /* convert to GLchan and return */
2592 for (i
= 0; i
< n
; i
++) {
2593 dest
[i
] = (GLchan
) (indexes
[i
] & 0xff);
2598 /* Convert indexes to RGBA */
2599 _mesa_map_ci_to_rgba(ctx
, n
, indexes
, rgba
);
2603 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
2604 srcPacking
->SwapBytes
);
2606 /* scale and bias colors */
2607 if (transferOps
& IMAGE_SCALE_BIAS_BIT
) {
2608 _mesa_scale_and_bias_rgba(ctx
, n
, rgba
,
2609 ctx
->Pixel
.RedScale
, ctx
->Pixel
.GreenScale
,
2610 ctx
->Pixel
.BlueScale
, ctx
->Pixel
.AlphaScale
,
2611 ctx
->Pixel
.RedBias
, ctx
->Pixel
.GreenBias
,
2612 ctx
->Pixel
.BlueBias
, ctx
->Pixel
.AlphaBias
);
2614 /* color map lookup */
2615 if (transferOps
& IMAGE_MAP_COLOR_BIT
) {
2616 _mesa_map_rgba(ctx
, n
, rgba
);
2621 /* GL_COLOR_TABLE lookup */
2622 if (transferOps
& IMAGE_COLOR_TABLE_BIT
) {
2623 _mesa_lookup_rgba(&ctx
->ColorTable
, n
, rgba
);
2626 if (transferOps
& IMAGE_CONVOLUTION_BIT
) {
2627 /* this has to be done in the calling code */
2629 /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
2630 if (transferOps
& IMAGE_POST_CONVOLUTION_SCALE_BIAS
) {
2631 _mesa_scale_and_bias_rgba(ctx
, n
, rgba
,
2632 ctx
->Pixel
.PostConvolutionScale
[RCOMP
],
2633 ctx
->Pixel
.PostConvolutionScale
[GCOMP
],
2634 ctx
->Pixel
.PostConvolutionScale
[BCOMP
],
2635 ctx
->Pixel
.PostConvolutionScale
[ACOMP
],
2636 ctx
->Pixel
.PostConvolutionBias
[RCOMP
],
2637 ctx
->Pixel
.PostConvolutionBias
[GCOMP
],
2638 ctx
->Pixel
.PostConvolutionBias
[BCOMP
],
2639 ctx
->Pixel
.PostConvolutionBias
[ACOMP
]);
2641 /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
2642 if (transferOps
& IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT
) {
2643 _mesa_lookup_rgba(&ctx
->PostConvolutionColorTable
, n
, rgba
);
2645 /* color matrix transform */
2646 if (transferOps
& IMAGE_COLOR_MATRIX_BIT
) {
2647 _mesa_transform_rgba(ctx
, n
, rgba
);
2649 /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
2650 if (transferOps
& IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT
) {
2651 _mesa_lookup_rgba(&ctx
->PostColorMatrixColorTable
, n
, rgba
);
2653 /* update histogram count */
2654 if (transferOps
& IMAGE_HISTOGRAM_BIT
) {
2655 _mesa_update_histogram(ctx
, n
, (CONST
GLfloat (*)[4]) rgba
);
2658 if (transferOps
& IMAGE_MIN_MAX_BIT
) {
2659 _mesa_update_minmax(ctx
, n
, (CONST
GLfloat (*)[4]) rgba
);
2663 /* clamp to [0,1] */
2666 for (i
= 0; i
< n
; i
++) {
2667 rgba
[i
][RCOMP
] = CLAMP(rgba
[i
][RCOMP
], 0.0F
, 1.0F
);
2668 rgba
[i
][GCOMP
] = CLAMP(rgba
[i
][GCOMP
], 0.0F
, 1.0F
);
2669 rgba
[i
][BCOMP
] = CLAMP(rgba
[i
][BCOMP
], 0.0F
, 1.0F
);
2670 rgba
[i
][ACOMP
] = CLAMP(rgba
[i
][ACOMP
], 0.0F
, 1.0F
);
2674 /* Now determine which color channels we need to produce.
2675 * And determine the dest index (offset) within each color tuple.
2677 switch (dstFormat
) {
2680 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
2681 dstLuminanceIndex
= dstIntensityIndex
= -1;
2684 dstLuminanceIndex
= 0;
2685 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
2686 dstIntensityIndex
= -1;
2688 case GL_LUMINANCE_ALPHA
:
2689 dstLuminanceIndex
= 0;
2691 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
2692 dstIntensityIndex
= -1;
2695 dstIntensityIndex
= 0;
2696 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
2697 dstLuminanceIndex
= -1;
2703 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
2710 dstLuminanceIndex
= dstIntensityIndex
= -1;
2713 gl_problem(ctx
, "bad dstFormat in _mesa_unpack_chan_span()");
2718 /* Now return the GLchan data in the requested dstFormat */
2720 if (dstRedIndex
>= 0) {
2723 for (i
= 0; i
< n
; i
++) {
2724 CLAMPED_FLOAT_TO_CHAN(dst
[dstRedIndex
], rgba
[i
][RCOMP
]);
2725 dst
+= dstComponents
;
2729 if (dstGreenIndex
>= 0) {
2732 for (i
= 0; i
< n
; i
++) {
2733 CLAMPED_FLOAT_TO_CHAN(dst
[dstGreenIndex
], rgba
[i
][GCOMP
]);
2734 dst
+= dstComponents
;
2738 if (dstBlueIndex
>= 0) {
2741 for (i
= 0; i
< n
; i
++) {
2742 CLAMPED_FLOAT_TO_CHAN(dst
[dstBlueIndex
], rgba
[i
][BCOMP
]);
2743 dst
+= dstComponents
;
2747 if (dstAlphaIndex
>= 0) {
2750 for (i
= 0; i
< n
; i
++) {
2751 CLAMPED_FLOAT_TO_CHAN(dst
[dstAlphaIndex
], rgba
[i
][ACOMP
]);
2752 dst
+= dstComponents
;
2756 if (dstIntensityIndex
>= 0) {
2759 assert(dstIntensityIndex
== 0);
2760 assert(dstComponents
== 1);
2761 for (i
= 0; i
< n
; i
++) {
2762 /* Intensity comes from red channel */
2763 CLAMPED_FLOAT_TO_CHAN(dst
[i
], rgba
[i
][RCOMP
]);
2767 if (dstLuminanceIndex
>= 0) {
2770 assert(dstLuminanceIndex
== 0);
2771 for (i
= 0; i
< n
; i
++) {
2772 /* Luminance comes from red channel */
2773 CLAMPED_FLOAT_TO_CHAN(dst
[0], rgba
[i
][RCOMP
]);
2774 dst
+= dstComponents
;
2782 _mesa_unpack_float_color_span( GLcontext
*ctx
,
2783 GLuint n
, GLenum dstFormat
, GLfloat dest
[],
2784 GLenum srcFormat
, GLenum srcType
,
2785 const GLvoid
*source
,
2786 const struct gl_pixelstore_attrib
*srcPacking
,
2787 GLuint transferOps
, GLboolean clamp
)
2789 ASSERT(dstFormat
== GL_ALPHA
||
2790 dstFormat
== GL_LUMINANCE
||
2791 dstFormat
== GL_LUMINANCE_ALPHA
||
2792 dstFormat
== GL_INTENSITY
||
2793 dstFormat
== GL_RGB
||
2794 dstFormat
== GL_RGBA
||
2795 dstFormat
== GL_COLOR_INDEX
);
2797 ASSERT(srcFormat
== GL_RED
||
2798 srcFormat
== GL_GREEN
||
2799 srcFormat
== GL_BLUE
||
2800 srcFormat
== GL_ALPHA
||
2801 srcFormat
== GL_LUMINANCE
||
2802 srcFormat
== GL_LUMINANCE_ALPHA
||
2803 srcFormat
== GL_INTENSITY
||
2804 srcFormat
== GL_RGB
||
2805 srcFormat
== GL_BGR
||
2806 srcFormat
== GL_RGBA
||
2807 srcFormat
== GL_BGRA
||
2808 srcFormat
== GL_ABGR_EXT
||
2809 srcFormat
== GL_COLOR_INDEX
);
2811 ASSERT(srcType
== GL_BITMAP
||
2812 srcType
== GL_UNSIGNED_BYTE
||
2813 srcType
== GL_BYTE
||
2814 srcType
== GL_UNSIGNED_SHORT
||
2815 srcType
== GL_SHORT
||
2816 srcType
== GL_UNSIGNED_INT
||
2817 srcType
== GL_INT
||
2818 srcType
== GL_FLOAT
||
2819 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
2820 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
2821 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
2822 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
2823 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
2824 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
2825 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
2826 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
2827 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
2828 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
2829 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
2830 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
2832 /* this is intended for RGBA mode only */
2833 assert(ctx
->Visual
.rgbMode
);
2835 /* general solution, no special cases, yet */
2837 GLfloat rgba
[MAX_WIDTH
][4];
2838 GLint dstComponents
;
2839 GLint dstRedIndex
, dstGreenIndex
, dstBlueIndex
, dstAlphaIndex
;
2840 GLint dstLuminanceIndex
, dstIntensityIndex
;
2842 dstComponents
= _mesa_components_in_format( dstFormat
);
2843 /* source & dest image formats should have been error checked by now */
2844 assert(dstComponents
> 0);
2847 * Extract image data and convert to RGBA floats
2849 assert(n
<= MAX_WIDTH
);
2850 if (srcFormat
== GL_COLOR_INDEX
) {
2851 GLuint indexes
[MAX_WIDTH
];
2852 extract_uint_indexes(n
, indexes
, srcFormat
, srcType
, source
,
2855 if (dstFormat
== GL_COLOR_INDEX
2856 && (transferOps
& IMAGE_MAP_COLOR_BIT
)) {
2857 _mesa_map_ci(ctx
, n
, indexes
);
2859 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
2860 _mesa_shift_and_offset_ci(ctx
, n
, indexes
);
2863 if (dstFormat
== GL_COLOR_INDEX
) {
2864 /* convert to GLchan and return */
2866 for (i
= 0; i
< n
; i
++) {
2867 dest
[i
] = (GLchan
) (indexes
[i
] & 0xff);
2872 /* Convert indexes to RGBA */
2873 _mesa_map_ci_to_rgba(ctx
, n
, indexes
, rgba
);
2877 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
2878 srcPacking
->SwapBytes
);
2880 /* scale and bias colors */
2881 if (transferOps
& IMAGE_SCALE_BIAS_BIT
) {
2882 _mesa_scale_and_bias_rgba(ctx
, n
, rgba
,
2883 ctx
->Pixel
.RedScale
, ctx
->Pixel
.GreenScale
,
2884 ctx
->Pixel
.BlueScale
, ctx
->Pixel
.AlphaScale
,
2885 ctx
->Pixel
.RedBias
, ctx
->Pixel
.GreenBias
,
2886 ctx
->Pixel
.BlueBias
, ctx
->Pixel
.AlphaBias
);
2888 /* color map lookup */
2889 if (transferOps
& IMAGE_MAP_COLOR_BIT
) {
2890 _mesa_map_rgba(ctx
, n
, rgba
);
2895 /* GL_COLOR_TABLE lookup */
2896 if (transferOps
& IMAGE_COLOR_TABLE_BIT
) {
2897 _mesa_lookup_rgba(&ctx
->ColorTable
, n
, rgba
);
2900 if (transferOps
& IMAGE_CONVOLUTION_BIT
) {
2903 /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
2904 if (transferOps
& IMAGE_POST_CONVOLUTION_SCALE_BIAS
) {
2905 _mesa_scale_and_bias_rgba(ctx
, n
, rgba
,
2906 ctx
->Pixel
.PostConvolutionScale
[RCOMP
],
2907 ctx
->Pixel
.PostConvolutionScale
[GCOMP
],
2908 ctx
->Pixel
.PostConvolutionScale
[BCOMP
],
2909 ctx
->Pixel
.PostConvolutionScale
[ACOMP
],
2910 ctx
->Pixel
.PostConvolutionBias
[RCOMP
],
2911 ctx
->Pixel
.PostConvolutionBias
[GCOMP
],
2912 ctx
->Pixel
.PostConvolutionBias
[BCOMP
],
2913 ctx
->Pixel
.PostConvolutionBias
[ACOMP
]);
2915 /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
2916 if (transferOps
& IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT
) {
2917 _mesa_lookup_rgba(&ctx
->PostConvolutionColorTable
, n
, rgba
);
2919 /* color matrix transform */
2920 if (transferOps
& IMAGE_COLOR_MATRIX_BIT
) {
2921 _mesa_transform_rgba(ctx
, n
, rgba
);
2923 /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
2924 if (transferOps
& IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT
) {
2925 _mesa_lookup_rgba(&ctx
->PostColorMatrixColorTable
, n
, rgba
);
2927 /* update histogram count */
2928 if (transferOps
& IMAGE_HISTOGRAM_BIT
) {
2929 _mesa_update_histogram(ctx
, n
, (CONST
GLfloat (*)[4]) rgba
);
2932 if (transferOps
& IMAGE_MIN_MAX_BIT
) {
2933 _mesa_update_minmax(ctx
, n
, (CONST
GLfloat (*)[4]) rgba
);
2937 /* clamp to [0,1] */
2940 for (i
= 0; i
< n
; i
++) {
2941 rgba
[i
][RCOMP
] = CLAMP(rgba
[i
][RCOMP
], 0.0F
, 1.0F
);
2942 rgba
[i
][GCOMP
] = CLAMP(rgba
[i
][GCOMP
], 0.0F
, 1.0F
);
2943 rgba
[i
][BCOMP
] = CLAMP(rgba
[i
][BCOMP
], 0.0F
, 1.0F
);
2944 rgba
[i
][ACOMP
] = CLAMP(rgba
[i
][ACOMP
], 0.0F
, 1.0F
);
2948 /* Now determine which color channels we need to produce.
2949 * And determine the dest index (offset) within each color tuple.
2951 switch (dstFormat
) {
2954 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
2955 dstLuminanceIndex
= dstIntensityIndex
= -1;
2958 dstLuminanceIndex
= 0;
2959 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
2960 dstIntensityIndex
= -1;
2962 case GL_LUMINANCE_ALPHA
:
2963 dstLuminanceIndex
= 0;
2965 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
2966 dstIntensityIndex
= -1;
2969 dstIntensityIndex
= 0;
2970 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
2971 dstLuminanceIndex
= -1;
2977 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
2984 dstLuminanceIndex
= dstIntensityIndex
= -1;
2987 gl_problem(ctx
, "bad dstFormat in _mesa_unpack_float_color_span()");
2991 /* Now pack results in the requested dstFormat */
2992 if (dstRedIndex
>= 0) {
2993 GLfloat
*dst
= dest
;
2995 for (i
= 0; i
< n
; i
++) {
2996 dst
[dstRedIndex
] = rgba
[i
][RCOMP
];
2997 dst
+= dstComponents
;
3001 if (dstGreenIndex
>= 0) {
3002 GLfloat
*dst
= dest
;
3004 for (i
= 0; i
< n
; i
++) {
3005 dst
[dstGreenIndex
] = rgba
[i
][GCOMP
];
3006 dst
+= dstComponents
;
3010 if (dstBlueIndex
>= 0) {
3011 GLfloat
*dst
= dest
;
3013 for (i
= 0; i
< n
; i
++) {
3014 dst
[dstBlueIndex
] = rgba
[i
][BCOMP
];
3015 dst
+= dstComponents
;
3019 if (dstAlphaIndex
>= 0) {
3020 GLfloat
*dst
= dest
;
3022 for (i
= 0; i
< n
; i
++) {
3023 dst
[dstAlphaIndex
] = rgba
[i
][ACOMP
];
3024 dst
+= dstComponents
;
3028 if (dstIntensityIndex
>= 0) {
3029 GLfloat
*dst
= dest
;
3031 assert(dstIntensityIndex
== 0);
3032 assert(dstComponents
== 1);
3033 for (i
= 0; i
< n
; i
++) {
3034 /* Intensity comes from red channel */
3035 dst
[i
] = rgba
[i
][RCOMP
];
3039 if (dstLuminanceIndex
>= 0) {
3040 GLfloat
*dst
= dest
;
3042 assert(dstLuminanceIndex
== 0);
3043 for (i
= 0; i
< n
; i
++) {
3044 /* Luminance comes from red channel */
3045 dst
[0] = rgba
[i
][RCOMP
];
3046 dst
+= dstComponents
;
3056 * Unpack a row of color index data from a client buffer according to
3057 * the pixel unpacking parameters.
3058 * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
3060 * Args: ctx - the context
3061 * n - number of pixels
3062 * dstType - destination datatype
3063 * dest - destination array
3064 * srcType - source pixel type
3065 * source - source data pointer
3066 * srcPacking - pixel unpacking parameters
3067 * transferOps - the pixel transfer operations to apply
3070 _mesa_unpack_index_span( const GLcontext
*ctx
, GLuint n
,
3071 GLenum dstType
, GLvoid
*dest
,
3072 GLenum srcType
, const GLvoid
*source
,
3073 const struct gl_pixelstore_attrib
*srcPacking
,
3074 GLuint transferOps
)
3076 ASSERT(srcType
== GL_BITMAP
||
3077 srcType
== GL_UNSIGNED_BYTE
||
3078 srcType
== GL_BYTE
||
3079 srcType
== GL_UNSIGNED_SHORT
||
3080 srcType
== GL_SHORT
||
3081 srcType
== GL_UNSIGNED_INT
||
3082 srcType
== GL_INT
||
3083 srcType
== GL_FLOAT
);
3085 ASSERT(dstType
== GL_UNSIGNED_BYTE
||
3086 dstType
== GL_UNSIGNED_SHORT
||
3087 dstType
== GL_UNSIGNED_INT
);
3090 transferOps
&= (IMAGE_MAP_COLOR_BIT
| IMAGE_SHIFT_OFFSET_BIT
);
3093 * Try simple cases first
3095 if (transferOps
== 0 && srcType
== GL_UNSIGNED_BYTE
3096 && dstType
== GL_UNSIGNED_BYTE
) {
3097 MEMCPY(dest
, source
, n
* sizeof(GLubyte
));
3099 else if (transferOps
== 0 && srcType
== GL_UNSIGNED_INT
3100 && dstType
== GL_UNSIGNED_INT
&& !srcPacking
->SwapBytes
) {
3101 MEMCPY(dest
, source
, n
* sizeof(GLuint
));
3107 GLuint indexes
[MAX_WIDTH
];
3108 assert(n
<= MAX_WIDTH
);
3110 extract_uint_indexes(n
, indexes
, GL_COLOR_INDEX
, srcType
, source
,
3113 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
3114 /* shift and offset indexes */
3115 _mesa_shift_and_offset_ci(ctx
, n
, indexes
);
3117 if (transferOps
& IMAGE_MAP_COLOR_BIT
) {
3118 /* Apply lookup table */
3119 _mesa_map_ci(ctx
, n
, indexes
);
3122 /* convert to dest type */
3124 case GL_UNSIGNED_BYTE
:
3126 GLubyte
*dst
= (GLubyte
*) dest
;
3128 for (i
= 0; i
< n
; i
++) {
3129 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
3133 case GL_UNSIGNED_SHORT
:
3135 GLuint
*dst
= (GLuint
*) dest
;
3137 for (i
= 0; i
< n
; i
++) {
3138 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
3142 case GL_UNSIGNED_INT
:
3143 MEMCPY(dest
, indexes
, n
* sizeof(GLuint
));
3146 gl_problem(ctx
, "bad dstType in _mesa_unpack_index_span");
3153 * Unpack a row of stencil data from a client buffer according to
3154 * the pixel unpacking parameters.
3155 * This is (or will be) used by glDrawPixels
3157 * Args: ctx - the context
3158 * n - number of pixels
3159 * dstType - destination datatype
3160 * dest - destination array
3161 * srcType - source pixel type
3162 * source - source data pointer
3163 * srcPacking - pixel unpacking parameters
3164 * transferOps - apply offset/bias/lookup ops?
3167 _mesa_unpack_stencil_span( const GLcontext
*ctx
, GLuint n
,
3168 GLenum dstType
, GLvoid
*dest
,
3169 GLenum srcType
, const GLvoid
*source
,
3170 const struct gl_pixelstore_attrib
*srcPacking
,
3171 GLuint transferOps
)
3173 ASSERT(srcType
== GL_BITMAP
||
3174 srcType
== GL_UNSIGNED_BYTE
||
3175 srcType
== GL_BYTE
||
3176 srcType
== GL_UNSIGNED_SHORT
||
3177 srcType
== GL_SHORT
||
3178 srcType
== GL_UNSIGNED_INT
||
3179 srcType
== GL_INT
||
3180 srcType
== GL_FLOAT
);
3182 ASSERT(dstType
== GL_UNSIGNED_BYTE
||
3183 dstType
== GL_UNSIGNED_SHORT
||
3184 dstType
== GL_UNSIGNED_INT
);
3186 /* only shift and offset apply to stencil */
3187 transferOps
&= IMAGE_SHIFT_OFFSET_BIT
;
3190 * Try simple cases first
3192 if (transferOps
== 0 &&
3193 srcType
== GL_UNSIGNED_BYTE
&&
3194 dstType
== GL_UNSIGNED_BYTE
) {
3195 MEMCPY(dest
, source
, n
* sizeof(GLubyte
));
3197 else if (transferOps
== 0 &&
3198 srcType
== GL_UNSIGNED_INT
&&
3199 dstType
== GL_UNSIGNED_INT
&&
3200 !srcPacking
->SwapBytes
) {
3201 MEMCPY(dest
, source
, n
* sizeof(GLuint
));
3207 GLuint indexes
[MAX_WIDTH
];
3208 assert(n
<= MAX_WIDTH
);
3210 extract_uint_indexes(n
, indexes
, GL_COLOR_INDEX
, srcType
, source
,
3214 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
3215 /* shift and offset indexes */
3216 _mesa_shift_and_offset_ci(ctx
, n
, indexes
);
3219 if (ctx
->Pixel
.MapStencilFlag
) {
3220 /* Apply stencil lookup table */
3221 GLuint mask
= ctx
->Pixel
.MapStoSsize
- 1;
3224 indexes
[i
] = ctx
->Pixel
.MapStoS
[ indexes
[i
] & mask
];
3229 /* convert to dest type */
3231 case GL_UNSIGNED_BYTE
:
3233 GLubyte
*dst
= (GLubyte
*) dest
;
3235 for (i
= 0; i
< n
; i
++) {
3236 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
3240 case GL_UNSIGNED_SHORT
:
3242 GLuint
*dst
= (GLuint
*) dest
;
3244 for (i
= 0; i
< n
; i
++) {
3245 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
3249 case GL_UNSIGNED_INT
:
3250 MEMCPY(dest
, indexes
, n
* sizeof(GLuint
));
3253 gl_problem(ctx
, "bad dstType in _mesa_unpack_stencil_span");
3261 _mesa_unpack_depth_span( const GLcontext
*ctx
, GLuint n
, GLdepth
*dest
,
3262 GLenum srcType
, const GLvoid
*source
,
3263 const struct gl_pixelstore_attrib
*srcPacking
,
3264 GLuint transferOps
)
3266 GLfloat
*depth
= MALLOC(n
* sizeof(GLfloat
));
3274 const GLubyte
*src
= (const GLubyte
*) source
;
3275 for (i
= 0; i
< n
; i
++) {
3276 depth
[i
] = BYTE_TO_FLOAT(src
[i
]);
3280 case GL_UNSIGNED_BYTE
:
3283 const GLubyte
*src
= (const GLubyte
*) source
;
3284 for (i
= 0; i
< n
; i
++) {
3285 depth
[i
] = UBYTE_TO_FLOAT(src
[i
]);
3292 const GLshort
*src
= (const GLshort
*) source
;
3293 for (i
= 0; i
< n
; i
++) {
3294 depth
[i
] = SHORT_TO_FLOAT(src
[i
]);
3298 case GL_UNSIGNED_SHORT
:
3301 const GLushort
*src
= (const GLushort
*) source
;
3302 for (i
= 0; i
< n
; i
++) {
3303 depth
[i
] = USHORT_TO_FLOAT(src
[i
]);
3310 const GLint
*src
= (const GLint
*) source
;
3311 for (i
= 0; i
< n
; i
++) {
3312 depth
[i
] = INT_TO_FLOAT(src
[i
]);
3316 case GL_UNSIGNED_INT
:
3319 const GLuint
*src
= (const GLuint
*) source
;
3320 for (i
= 0; i
< n
; i
++) {
3321 depth
[i
] = UINT_TO_FLOAT(src
[i
]);
3326 MEMCPY(depth
, source
, n
* sizeof(GLfloat
));
3329 gl_problem(NULL
, "bad type in _mesa_unpack_depth_span()");
3335 /* apply depth scale and bias */
3336 if (ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0) {
3338 for (i
= 0; i
< n
; i
++) {
3339 depth
[i
] = depth
[i
] * ctx
->Pixel
.DepthScale
+ ctx
->Pixel
.DepthBias
;
3343 /* clamp depth values to [0,1] and convert from floats to integers */
3345 const GLfloat zs
= ctx
->DepthMaxF
;
3347 for (i
= 0; i
< n
; i
++) {
3348 dest
[i
] = (GLdepth
) (CLAMP(depth
[i
], 0.0F
, 1.0F
) * zs
);
3358 * Unpack image data. Apply byteswapping, byte flipping (bitmap).
3359 * Return all image data in a contiguous block.
3362 _mesa_unpack_image( GLsizei width
, GLsizei height
, GLsizei depth
,
3363 GLenum format
, GLenum type
, const GLvoid
*pixels
,
3364 const struct gl_pixelstore_attrib
*unpack
)
3366 GLint bytesPerRow
, compsPerRow
;
3367 GLboolean flipBytes
, swap2
, swap4
;
3370 return NULL
; /* not necessarily an error */
3372 if (width
<= 0 || height
<= 0 || depth
<= 0)
3373 return NULL
; /* generate error later */
3375 if (format
== GL_BITMAP
) {
3376 bytesPerRow
= (width
+ 7) >> 3;
3377 flipBytes
= !unpack
->LsbFirst
;
3378 swap2
= swap4
= GL_FALSE
;
3382 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
3383 const GLint components
= _mesa_components_in_format(format
);
3385 if (bytesPerPixel
<= 0 || components
<= 0)
3386 return NULL
; /* bad format or type. generate error later */
3387 bytesPerRow
= bytesPerPixel
* width
;
3388 bytesPerComp
= bytesPerPixel
/ components
;
3389 flipBytes
= GL_FALSE
;
3390 swap2
= (bytesPerComp
== 2) && unpack
->SwapBytes
;
3391 swap4
= (bytesPerComp
== 4) && unpack
->SwapBytes
;
3392 compsPerRow
= components
* width
;
3393 assert(compsPerRow
>= width
);
3397 GLubyte
*destBuffer
= MALLOC(bytesPerRow
* height
* depth
);
3401 return NULL
; /* generate GL_OUT_OF_MEMORY later */
3404 for (img
= 0; img
< depth
; img
++) {
3405 for (row
= 0; row
< height
; row
++) {
3406 const GLvoid
*src
= _mesa_image_address(unpack
, pixels
,
3407 width
, height
, format
, type
, img
, row
, 0);
3408 MEMCPY(dst
, src
, bytesPerRow
);
3409 /* byte flipping/swapping */
3411 flip_bytes((GLubyte
*) dst
, bytesPerRow
);
3414 _mesa_swap2((GLushort
*) dst
, compsPerRow
);
3417 _mesa_swap4((GLuint
*) dst
, compsPerRow
);