1 /* $Id: image.c,v 1.27 2000/04/15 23:05:39 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.
44 * These are the image packing parameters for Mesa's internal images.
45 * That is, _mesa_unpack_image() returns image data in this format.
46 * When we execute image commands (glDrawPixels, glTexImage, etc)
47 * from within display lists we have to be sure to set the current
48 * unpacking params to these values!
50 const struct gl_pixelstore_attrib _mesa_native_packing
= {
57 GL_FALSE
, /* SwapBytes */
58 GL_FALSE
/* LsbFirst */
64 * Flip the 8 bits in each byte of the given array.
67 flip_bytes( GLubyte
*p
, GLuint n
)
69 register GLuint i
, a
, b
;
73 a
= ((b
& 0x01) << 7) |
87 * Flip the order of the 2 bytes in each word in the given array.
90 _mesa_swap2( GLushort
*p
, GLuint n
)
95 p
[i
] = (p
[i
] >> 8) | ((p
[i
] << 8) & 0xff00);
102 * Flip the order of the 4 bytes in each word in the given array.
105 _mesa_swap4( GLuint
*p
, GLuint n
)
107 register GLuint i
, a
, b
;
112 | ((b
>> 8) & 0xff00)
113 | ((b
<< 8) & 0xff0000)
114 | ((b
<< 24) & 0xff000000);
123 * Return the size, in bytes, of the given GL datatype.
124 * Return 0 if GL_BITMAP.
125 * Return -1 if invalid type enum.
127 GLint
_mesa_sizeof_type( GLenum type
)
132 case GL_UNSIGNED_BYTE
:
133 return sizeof(GLubyte
);
135 return sizeof(GLbyte
);
136 case GL_UNSIGNED_SHORT
:
137 return sizeof(GLushort
);
139 return sizeof(GLshort
);
140 case GL_UNSIGNED_INT
:
141 return sizeof(GLuint
);
143 return sizeof(GLint
);
145 return sizeof(GLfloat
);
153 * Same as _mesa_sizeof_packed_type() but we also accept the
154 * packed pixel format datatypes.
156 GLint
_mesa_sizeof_packed_type( GLenum type
)
161 case GL_UNSIGNED_BYTE
:
162 return sizeof(GLubyte
);
164 return sizeof(GLbyte
);
165 case GL_UNSIGNED_SHORT
:
166 return sizeof(GLushort
);
168 return sizeof(GLshort
);
169 case GL_UNSIGNED_INT
:
170 return sizeof(GLuint
);
172 return sizeof(GLint
);
174 return sizeof(GLfloat
);
175 case GL_UNSIGNED_BYTE_3_3_2
:
176 return sizeof(GLubyte
);
177 case GL_UNSIGNED_BYTE_2_3_3_REV
:
178 return sizeof(GLubyte
);
179 case GL_UNSIGNED_SHORT_5_6_5
:
180 return sizeof(GLshort
);
181 case GL_UNSIGNED_SHORT_5_6_5_REV
:
182 return sizeof(GLshort
);
183 case GL_UNSIGNED_SHORT_4_4_4_4
:
184 return sizeof(GLshort
);
185 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
186 return sizeof(GLshort
);
187 case GL_UNSIGNED_SHORT_5_5_5_1
:
188 return sizeof(GLshort
);
189 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
190 return sizeof(GLshort
);
191 case GL_UNSIGNED_INT_8_8_8_8
:
192 return sizeof(GLuint
);
193 case GL_UNSIGNED_INT_8_8_8_8_REV
:
194 return sizeof(GLuint
);
195 case GL_UNSIGNED_INT_10_10_10_2
:
196 return sizeof(GLuint
);
197 case GL_UNSIGNED_INT_2_10_10_10_REV
:
198 return sizeof(GLuint
);
207 * Return the number of components in a GL enum pixel type.
208 * Return -1 if bad format.
210 GLint
_mesa_components_in_format( GLenum format
)
214 case GL_COLOR_INDEX1_EXT
:
215 case GL_COLOR_INDEX2_EXT
:
216 case GL_COLOR_INDEX4_EXT
:
217 case GL_COLOR_INDEX8_EXT
:
218 case GL_COLOR_INDEX12_EXT
:
219 case GL_COLOR_INDEX16_EXT
:
220 case GL_STENCIL_INDEX
:
221 case GL_DEPTH_COMPONENT
:
229 case GL_LUMINANCE_ALPHA
:
248 * Return bytes per pixel for given format and type
249 * Return -1 if bad format or type.
251 GLint
_mesa_bytes_per_pixel( GLenum format
, GLenum type
)
253 GLint comps
= _mesa_components_in_format( format
);
259 return 0; /* special case */
261 case GL_UNSIGNED_BYTE
:
262 return comps
* sizeof(GLubyte
);
264 case GL_UNSIGNED_SHORT
:
265 return comps
* sizeof(GLshort
);
267 case GL_UNSIGNED_INT
:
268 return comps
* sizeof(GLint
);
270 return comps
* sizeof(GLfloat
);
271 case GL_UNSIGNED_BYTE_3_3_2
:
272 case GL_UNSIGNED_BYTE_2_3_3_REV
:
273 if (format
== GL_RGB
|| format
== GL_BGR
)
274 return sizeof(GLubyte
);
276 return -1; /* error */
277 case GL_UNSIGNED_SHORT_5_6_5
:
278 case GL_UNSIGNED_SHORT_5_6_5_REV
:
279 if (format
== GL_RGB
|| format
== GL_BGR
)
280 return sizeof(GLshort
);
282 return -1; /* error */
283 case GL_UNSIGNED_SHORT_4_4_4_4
:
284 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
285 case GL_UNSIGNED_SHORT_5_5_5_1
:
286 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
287 if (format
== GL_RGBA
|| format
== GL_BGRA
|| format
== GL_ABGR_EXT
)
288 return sizeof(GLushort
);
291 case GL_UNSIGNED_INT_8_8_8_8
:
292 case GL_UNSIGNED_INT_8_8_8_8_REV
:
293 case GL_UNSIGNED_INT_10_10_10_2
:
294 case GL_UNSIGNED_INT_2_10_10_10_REV
:
295 if (format
== GL_RGBA
|| format
== GL_BGRA
|| format
== GL_ABGR_EXT
)
296 return sizeof(GLuint
);
306 * Test if the given pixel format and type are legal.
307 * Return GL_TRUE for legal, GL_FALSE for illegal.
310 _mesa_is_legal_format_and_type( GLenum format
, GLenum type
)
314 case GL_STENCIL_INDEX
:
318 case GL_UNSIGNED_BYTE
:
320 case GL_UNSIGNED_SHORT
:
322 case GL_UNSIGNED_INT
:
333 case GL_LUMINANCE_ALPHA
:
334 case GL_DEPTH_COMPONENT
:
338 case GL_UNSIGNED_BYTE
:
340 case GL_UNSIGNED_SHORT
:
342 case GL_UNSIGNED_INT
:
351 case GL_UNSIGNED_BYTE
:
353 case GL_UNSIGNED_SHORT
:
355 case GL_UNSIGNED_INT
:
357 case GL_UNSIGNED_BYTE_3_3_2
:
358 case GL_UNSIGNED_BYTE_2_3_3_REV
:
359 case GL_UNSIGNED_SHORT_5_6_5
:
360 case GL_UNSIGNED_SHORT_5_6_5_REV
:
370 case GL_UNSIGNED_BYTE
:
372 case GL_UNSIGNED_SHORT
:
374 case GL_UNSIGNED_INT
:
376 case GL_UNSIGNED_SHORT_4_4_4_4
:
377 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
378 case GL_UNSIGNED_SHORT_5_5_5_1
:
379 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
380 case GL_UNSIGNED_INT_8_8_8_8
:
381 case GL_UNSIGNED_INT_8_8_8_8_REV
:
382 case GL_UNSIGNED_INT_10_10_10_2
:
383 case GL_UNSIGNED_INT_2_10_10_10_REV
:
397 * Return the address of a pixel in an image (actually a volume).
398 * Pixel unpacking/packing parameters are observed according to 'packing'.
399 * Input: image - start of image data
400 * width, height - size of image
401 * format - image format
402 * type - pixel component type
403 * packing - the pixelstore attributes
404 * img - which image in the volume (0 for 1D or 2D images)
405 * row, column - location of pixel in the image
406 * Return: address of pixel at (image,row,column) in image or NULL if error.
409 _mesa_image_address( const struct gl_pixelstore_attrib
*packing
,
410 const GLvoid
*image
, GLsizei width
,
411 GLsizei height
, GLenum format
, GLenum type
,
412 GLint img
, GLint row
, GLint column
)
414 GLint alignment
; /* 1, 2 or 4 */
415 GLint pixels_per_row
;
416 GLint rows_per_image
;
419 GLint skipimages
; /* for 3-D volume images */
422 alignment
= packing
->Alignment
;
423 if (packing
->RowLength
> 0) {
424 pixels_per_row
= packing
->RowLength
;
427 pixels_per_row
= width
;
429 if (packing
->ImageHeight
> 0) {
430 rows_per_image
= packing
->ImageHeight
;
433 rows_per_image
= height
;
435 skiprows
= packing
->SkipRows
;
436 skippixels
= packing
->SkipPixels
;
437 skipimages
= packing
->SkipImages
;
439 if (type
==GL_BITMAP
) {
441 GLint comp_per_pixel
; /* components per pixel */
442 GLint bytes_per_comp
; /* bytes per component */
444 GLint bytes_per_image
;
446 /* Compute bytes per component */
447 bytes_per_comp
= _mesa_sizeof_packed_type( type
);
448 if (bytes_per_comp
<0) {
452 /* Compute number of components per pixel */
453 comp_per_pixel
= _mesa_components_in_format( format
);
454 if (comp_per_pixel
<0 && type
!= GL_BITMAP
) {
458 bytes_per_row
= alignment
459 * CEILING( comp_per_pixel
*pixels_per_row
, 8*alignment
);
461 bytes_per_image
= bytes_per_row
* rows_per_image
;
463 pixel_addr
= (GLubyte
*) image
464 + (skipimages
+ img
) * bytes_per_image
465 + (skiprows
+ row
) * bytes_per_row
466 + (skippixels
+ column
) / 8;
469 /* Non-BITMAP data */
470 GLint bytes_per_pixel
, bytes_per_row
, remainder
, bytes_per_image
;
472 bytes_per_pixel
= _mesa_bytes_per_pixel( format
, type
);
474 /* The pixel type and format should have been error checked earlier */
475 assert(bytes_per_pixel
> 0);
477 bytes_per_row
= pixels_per_row
* bytes_per_pixel
;
478 remainder
= bytes_per_row
% alignment
;
480 bytes_per_row
+= (alignment
- remainder
);
482 ASSERT(bytes_per_row
% alignment
== 0);
484 bytes_per_image
= bytes_per_row
* rows_per_image
;
486 /* compute final pixel address */
487 pixel_addr
= (GLubyte
*) image
488 + (skipimages
+ img
) * bytes_per_image
489 + (skiprows
+ row
) * bytes_per_row
490 + (skippixels
+ column
) * bytes_per_pixel
;
493 return (GLvoid
*) pixel_addr
;
499 * Compute the stride between image rows (in bytes) for the given
500 * pixel packing parameters and image width, format and type.
503 _mesa_image_row_stride( const struct gl_pixelstore_attrib
*packing
,
504 GLint width
, GLenum format
, GLenum type
)
507 if (type
== GL_BITMAP
) {
509 if (packing
->RowLength
== 0) {
510 GLint bytes
= (width
+ 7) / 8;
514 GLint bytes
= (packing
->RowLength
+ 7) / 8;
519 /* Non-BITMAP data */
520 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
521 if (bytesPerPixel
<= 0)
522 return -1; /* error */
523 if (packing
->RowLength
== 0) {
524 GLint bytes
= bytesPerPixel
* width
;
528 GLint bytes
= bytesPerPixel
* packing
->RowLength
;
537 * Unpack a 32x32 pixel polygon stipple from user memory using the
538 * current pixel unpack settings.
541 _mesa_unpack_polygon_stipple( const GLubyte
*pattern
, GLuint dest
[32],
542 const struct gl_pixelstore_attrib
*unpacking
)
544 GLubyte
*ptrn
= (GLubyte
*) _mesa_unpack_bitmap( 32, 32, pattern
, unpacking
);
546 /* Convert pattern from GLubytes to GLuints and handle big/little
551 for (i
= 0; i
< 32; i
++) {
552 dest
[i
] = (p
[0] << 24)
565 * Pack polygon stipple into user memory given current pixel packing
569 _mesa_pack_polygon_stipple( const GLuint pattern
[32], GLubyte
*dest
,
570 const struct gl_pixelstore_attrib
*packing
)
572 /* Convert pattern from GLuints to GLubytes to handle big/little
573 * endian differences.
577 for (i
= 0; i
< 32; i
++) {
578 ptrn
[i
* 4 + 0] = (GLubyte
) ((pattern
[i
] >> 24) & 0xff);
579 ptrn
[i
* 4 + 1] = (GLubyte
) ((pattern
[i
] >> 16) & 0xff);
580 ptrn
[i
* 4 + 2] = (GLubyte
) ((pattern
[i
] >> 8 ) & 0xff);
581 ptrn
[i
* 4 + 3] = (GLubyte
) ((pattern
[i
] ) & 0xff);
584 _mesa_pack_bitmap(32, 32, ptrn
, dest
, packing
);
590 * Pack the given RGBA span into client memory at 'dest' address
591 * in the given pixel format and type.
592 * Optionally apply the enabled pixel transfer ops.
593 * Pack into memory using the given packing params struct.
594 * This is used by glReadPixels and glGetTexImage?D()
595 * Input: ctx - the context
596 * n - number of pixels in the span
598 * format - dest packing format
599 * type - dest packing datatype
600 * destination - destination packing address
601 * packing - pixel packing parameters
602 * applyTransferOps - apply scale/bias/lookup-table ops?
605 _mesa_pack_rgba_span( const GLcontext
*ctx
,
606 GLuint n
, CONST GLubyte srcRgba
[][4],
607 GLenum format
, GLenum type
, GLvoid
*destination
,
608 const struct gl_pixelstore_attrib
*packing
,
609 GLboolean applyTransferOps
)
611 applyTransferOps
&= (ctx
->Pixel
.ScaleOrBiasRGBA
||
612 ctx
->Pixel
.MapColorFlag
||
613 ctx
->ColorMatrix
.type
!= MATRIX_IDENTITY
||
614 ctx
->Pixel
.ScaleOrBiasRGBApcm
||
615 ctx
->Pixel
.ColorTableEnabled
);
617 /* Test for optimized case first */
618 if (!applyTransferOps
&& format
== GL_RGBA
&& type
== GL_UNSIGNED_BYTE
) {
619 /* common simple case */
620 MEMCPY( destination
, srcRgba
, n
* 4 * sizeof(GLubyte
) );
622 else if (!applyTransferOps
&& format
== GL_RGB
&& type
== GL_UNSIGNED_BYTE
) {
623 /* common simple case */
625 GLubyte
*dest
= (GLubyte
*) destination
;
626 for (i
= 0; i
< n
; i
++) {
627 dest
[0] = srcRgba
[i
][RCOMP
];
628 dest
[1] = srcRgba
[i
][GCOMP
];
629 dest
[2] = srcRgba
[i
][BCOMP
];
634 /* general solution */
635 GLfloat rgba
[MAX_WIDTH
][4], luminance
[MAX_WIDTH
];
636 const GLfloat rscale
= 1.0F
/ 255.0F
;
637 const GLfloat gscale
= 1.0F
/ 255.0F
;
638 const GLfloat bscale
= 1.0F
/ 255.0F
;
639 const GLfloat ascale
= 1.0F
/ 255.0F
;
640 const GLint comps
= _mesa_components_in_format(format
);
643 assert(n
<= MAX_WIDTH
);
645 /* convert color components to floating point */
647 rgba
[i
][RCOMP
] = srcRgba
[i
][RCOMP
] * rscale
;
648 rgba
[i
][GCOMP
] = srcRgba
[i
][GCOMP
] * gscale
;
649 rgba
[i
][BCOMP
] = srcRgba
[i
][BCOMP
] * bscale
;
650 rgba
[i
][ACOMP
] = srcRgba
[i
][ACOMP
] * ascale
;
654 * Apply scale, bias and lookup-tables if enabled.
656 if (applyTransferOps
) {
658 if (ctx
->Pixel
.ScaleOrBiasRGBA
) {
659 _mesa_scale_and_bias_rgba( ctx
, n
, rgba
);
661 /* color table lookup */
662 if (ctx
->Pixel
.MapColorFlag
) {
663 _mesa_map_rgba( ctx
, n
, rgba
);
666 if (ctx
->ColorMatrix
.type
!= MATRIX_IDENTITY
||
667 ctx
->Pixel
.ScaleOrBiasRGBApcm
) {
668 _mesa_transform_rgba(ctx
, n
, rgba
);
670 /* GL_SGI_color_table lookup */
671 if (ctx
->Pixel
.ColorTableEnabled
) {
672 _mesa_lookup_rgba(&ctx
->ColorTable
, n
, rgba
);
676 if (format
==GL_LUMINANCE
|| format
==GL_LUMINANCE_ALPHA
) {
678 GLfloat sum
= rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
679 luminance
[i
] = CLAMP( sum
, 0.0F
, 1.0F
);
684 * Pack/store the pixels. Ugh! Lots of cases!!!
687 case GL_UNSIGNED_BYTE
:
689 GLubyte
*dst
= (GLubyte
*) destination
;
693 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
697 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
701 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
705 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
709 dst
[i
] = FLOAT_TO_UBYTE(luminance
[i
]);
711 case GL_LUMINANCE_ALPHA
:
713 dst
[i
*2+0] = FLOAT_TO_UBYTE(luminance
[i
]);
714 dst
[i
*2+1] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
719 dst
[i
*3+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
720 dst
[i
*3+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
721 dst
[i
*3+2] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
726 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
727 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
728 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
729 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
734 dst
[i
*3+0] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
735 dst
[i
*3+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
736 dst
[i
*3+2] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
741 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
742 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
743 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
744 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
749 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
750 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
751 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
752 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
756 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
762 GLbyte
*dst
= (GLbyte
*) destination
;
766 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
770 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
774 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
778 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
782 dst
[i
] = FLOAT_TO_BYTE(luminance
[i
]);
784 case GL_LUMINANCE_ALPHA
:
786 dst
[i
*2+0] = FLOAT_TO_BYTE(luminance
[i
]);
787 dst
[i
*2+1] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
792 dst
[i
*3+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
793 dst
[i
*3+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
794 dst
[i
*3+2] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
799 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
800 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
801 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
802 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
807 dst
[i
*3+0] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
808 dst
[i
*3+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
809 dst
[i
*3+2] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
814 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
815 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
816 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
817 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
821 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
822 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
823 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
824 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
828 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
832 case GL_UNSIGNED_SHORT
:
834 GLushort
*dst
= (GLushort
*) destination
;
838 dst
[i
] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
842 dst
[i
] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
846 dst
[i
] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
850 dst
[i
] = FLOAT_TO_USHORT(rgba
[i
][ACOMP
]);
854 dst
[i
] = FLOAT_TO_USHORT(luminance
[i
]);
856 case GL_LUMINANCE_ALPHA
:
858 dst
[i
*2+0] = FLOAT_TO_USHORT(luminance
[i
]);
859 dst
[i
*2+1] = FLOAT_TO_USHORT(rgba
[i
][ACOMP
]);
864 dst
[i
*3+0] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
865 dst
[i
*3+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
866 dst
[i
*3+2] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
871 dst
[i
*4+0] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
872 dst
[i
*4+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
873 dst
[i
*4+2] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
874 dst
[i
*4+3] = FLOAT_TO_USHORT(rgba
[i
][ACOMP
]);
879 dst
[i
*3+0] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
880 dst
[i
*3+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
881 dst
[i
*3+2] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
886 dst
[i
*4+0] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
887 dst
[i
*4+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
888 dst
[i
*4+2] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
889 dst
[i
*4+3] = FLOAT_TO_USHORT(rgba
[i
][ACOMP
]);
894 dst
[i
*4+0] = FLOAT_TO_USHORT(rgba
[i
][ACOMP
]);
895 dst
[i
*4+1] = FLOAT_TO_USHORT(rgba
[i
][BCOMP
]);
896 dst
[i
*4+2] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
897 dst
[i
*4+3] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
901 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
903 if (packing
->SwapBytes
) {
904 _mesa_swap2( (GLushort
*) dst
, n
* comps
);
910 GLshort
*dst
= (GLshort
*) destination
;
914 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
918 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
922 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
926 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
930 dst
[i
] = FLOAT_TO_SHORT(luminance
[i
]);
932 case GL_LUMINANCE_ALPHA
:
934 dst
[i
*2+0] = FLOAT_TO_SHORT(luminance
[i
]);
935 dst
[i
*2+1] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
940 dst
[i
*3+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
941 dst
[i
*3+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
942 dst
[i
*3+2] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
947 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
948 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
949 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
950 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
955 dst
[i
*3+0] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
956 dst
[i
*3+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
957 dst
[i
*3+2] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
962 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
963 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
964 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
965 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
969 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
970 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
971 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
972 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
976 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
978 if (packing
->SwapBytes
) {
979 _mesa_swap2( (GLushort
*) dst
, n
* comps
);
983 case GL_UNSIGNED_INT
:
985 GLuint
*dst
= (GLuint
*) destination
;
989 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
993 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
997 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1001 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
1005 dst
[i
] = FLOAT_TO_UINT(luminance
[i
]);
1007 case GL_LUMINANCE_ALPHA
:
1009 dst
[i
*2+0] = FLOAT_TO_UINT(luminance
[i
]);
1010 dst
[i
*2+1] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
1015 dst
[i
*3+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1016 dst
[i
*3+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1017 dst
[i
*3+2] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1022 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1023 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1024 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1025 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
1030 dst
[i
*3+0] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1031 dst
[i
*3+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1032 dst
[i
*3+2] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1037 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1038 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1039 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1040 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
1045 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
1046 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
1047 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
1048 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
1052 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
1054 if (packing
->SwapBytes
) {
1055 _mesa_swap4( (GLuint
*) dst
, n
* comps
);
1061 GLint
*dst
= (GLint
*) destination
;
1065 dst
[i
] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1069 dst
[i
] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1073 dst
[i
] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1077 dst
[i
] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
1081 dst
[i
] = FLOAT_TO_INT(luminance
[i
]);
1083 case GL_LUMINANCE_ALPHA
:
1085 dst
[i
*2+0] = FLOAT_TO_INT(luminance
[i
]);
1086 dst
[i
*2+1] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
1091 dst
[i
*3+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1092 dst
[i
*3+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1093 dst
[i
*3+2] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1098 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1099 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1100 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1101 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
1106 dst
[i
*3+0] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1107 dst
[i
*3+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1108 dst
[i
*3+2] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1113 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1114 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1115 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1116 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
1121 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
1122 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
1123 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
1124 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
1128 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
1130 if (packing
->SwapBytes
) {
1131 _mesa_swap4( (GLuint
*) dst
, n
* comps
);
1137 GLfloat
*dst
= (GLfloat
*) destination
;
1141 dst
[i
] = rgba
[i
][RCOMP
];
1145 dst
[i
] = rgba
[i
][GCOMP
];
1149 dst
[i
] = rgba
[i
][BCOMP
];
1153 dst
[i
] = rgba
[i
][ACOMP
];
1157 dst
[i
] = luminance
[i
];
1159 case GL_LUMINANCE_ALPHA
:
1161 dst
[i
*2+0] = luminance
[i
];
1162 dst
[i
*2+1] = rgba
[i
][ACOMP
];
1167 dst
[i
*3+0] = rgba
[i
][RCOMP
];
1168 dst
[i
*3+1] = rgba
[i
][GCOMP
];
1169 dst
[i
*3+2] = rgba
[i
][BCOMP
];
1174 dst
[i
*4+0] = rgba
[i
][RCOMP
];
1175 dst
[i
*4+1] = rgba
[i
][GCOMP
];
1176 dst
[i
*4+2] = rgba
[i
][BCOMP
];
1177 dst
[i
*4+3] = rgba
[i
][ACOMP
];
1182 dst
[i
*3+0] = rgba
[i
][BCOMP
];
1183 dst
[i
*3+1] = rgba
[i
][GCOMP
];
1184 dst
[i
*3+2] = rgba
[i
][RCOMP
];
1189 dst
[i
*4+0] = rgba
[i
][BCOMP
];
1190 dst
[i
*4+1] = rgba
[i
][GCOMP
];
1191 dst
[i
*4+2] = rgba
[i
][RCOMP
];
1192 dst
[i
*4+3] = rgba
[i
][ACOMP
];
1197 dst
[i
*4+0] = rgba
[i
][ACOMP
];
1198 dst
[i
*4+1] = rgba
[i
][BCOMP
];
1199 dst
[i
*4+2] = rgba
[i
][GCOMP
];
1200 dst
[i
*4+3] = rgba
[i
][RCOMP
];
1204 gl_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
1206 if (packing
->SwapBytes
) {
1207 _mesa_swap4( (GLuint
*) dst
, n
* comps
);
1211 case GL_UNSIGNED_BYTE_3_3_2
:
1212 if (format
== GL_RGB
) {
1213 GLubyte
*dst
= (GLubyte
*) destination
;
1215 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 7.0F
)) << 5)
1216 | (((GLint
) (rgba
[i
][GCOMP
] * 7.0F
)) << 2)
1217 | (((GLint
) (rgba
[i
][BCOMP
] * 3.0F
)) );
1221 case GL_UNSIGNED_BYTE_2_3_3_REV
:
1222 if (format
== GL_RGB
) {
1223 GLubyte
*dst
= (GLubyte
*) destination
;
1225 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 7.0F
)) )
1226 | (((GLint
) (rgba
[i
][GCOMP
] * 7.0F
)) << 3)
1227 | (((GLint
) (rgba
[i
][BCOMP
] * 3.0F
)) << 5);
1231 case GL_UNSIGNED_SHORT_5_6_5
:
1232 if (format
== GL_RGB
) {
1233 GLushort
*dst
= (GLushort
*) destination
;
1235 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 31.0F
)) << 11)
1236 | (((GLint
) (rgba
[i
][GCOMP
] * 63.0F
)) << 5)
1237 | (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) );
1241 case GL_UNSIGNED_SHORT_5_6_5_REV
:
1242 if (format
== GL_RGB
) {
1243 GLushort
*dst
= (GLushort
*) destination
;
1245 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 31.0F
)) )
1246 | (((GLint
) (rgba
[i
][GCOMP
] * 63.0F
)) << 5)
1247 | (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) << 11);
1251 case GL_UNSIGNED_SHORT_4_4_4_4
:
1252 if (format
== GL_RGB
) {
1253 GLushort
*dst
= (GLushort
*) destination
;
1255 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 15.0F
)) << 12)
1256 | (((GLint
) (rgba
[i
][GCOMP
] * 15.0F
)) << 8)
1257 | (((GLint
) (rgba
[i
][BCOMP
] * 15.0F
)) << 4)
1258 | (((GLint
) (rgba
[i
][ACOMP
] * 15.0F
)) );
1262 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
1263 if (format
== GL_RGB
) {
1264 GLushort
*dst
= (GLushort
*) destination
;
1266 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 15.0F
)) )
1267 | (((GLint
) (rgba
[i
][GCOMP
] * 15.0F
)) << 4)
1268 | (((GLint
) (rgba
[i
][BCOMP
] * 15.0F
)) << 8)
1269 | (((GLint
) (rgba
[i
][ACOMP
] * 15.0F
)) << 12);
1273 case GL_UNSIGNED_SHORT_5_5_5_1
:
1274 if (format
== GL_RGB
) {
1275 GLushort
*dst
= (GLushort
*) destination
;
1277 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 31.0F
)) << 11)
1278 | (((GLint
) (rgba
[i
][GCOMP
] * 31.0F
)) << 6)
1279 | (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) << 1)
1280 | (((GLint
) (rgba
[i
][ACOMP
] * 1.0F
)) );
1284 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
1285 if (format
== GL_RGB
) {
1286 GLushort
*dst
= (GLushort
*) destination
;
1288 dst
[i
] = (((GLint
) (rgba
[i
][RCOMP
] * 31.0F
)) )
1289 | (((GLint
) (rgba
[i
][GCOMP
] * 31.0F
)) << 5)
1290 | (((GLint
) (rgba
[i
][BCOMP
] * 31.0F
)) << 10)
1291 | (((GLint
) (rgba
[i
][ACOMP
] * 1.0F
)) << 15);
1295 case GL_UNSIGNED_INT_8_8_8_8
:
1296 if (format
== GL_RGBA
) {
1297 GLuint
*dst
= (GLuint
*) destination
;
1299 dst
[i
] = (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) << 24)
1300 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 16)
1301 | (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) << 8)
1302 | (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) );
1305 else if (format
== GL_BGRA
) {
1306 GLuint
*dst
= (GLuint
*) destination
;
1308 dst
[i
] = (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) << 24)
1309 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 16)
1310 | (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) << 8)
1311 | (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) );
1314 else if (format
== GL_ABGR_EXT
) {
1315 GLuint
*dst
= (GLuint
*) destination
;
1317 dst
[i
] = (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) << 24)
1318 | (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) << 16)
1319 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 8)
1320 | (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) );
1324 case GL_UNSIGNED_INT_8_8_8_8_REV
:
1325 if (format
== GL_RGBA
) {
1326 GLuint
*dst
= (GLuint
*) destination
;
1328 dst
[i
] = (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) )
1329 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 8)
1330 | (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) << 16)
1331 | (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) << 24);
1334 else if (format
== GL_BGRA
) {
1335 GLuint
*dst
= (GLuint
*) destination
;
1337 dst
[i
] = (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) )
1338 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 8)
1339 | (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) << 16)
1340 | (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) << 24);
1343 else if (format
== GL_ABGR_EXT
) {
1344 GLuint
*dst
= (GLuint
*) destination
;
1346 dst
[i
] = (((GLuint
) (rgba
[i
][ACOMP
] * 255.0F
)) )
1347 | (((GLuint
) (rgba
[i
][BCOMP
] * 255.0F
)) << 8)
1348 | (((GLuint
) (rgba
[i
][GCOMP
] * 255.0F
)) << 16)
1349 | (((GLuint
) (rgba
[i
][RCOMP
] * 255.0F
)) << 24);
1353 case GL_UNSIGNED_INT_10_10_10_2
:
1354 if (format
== GL_RGBA
) {
1355 GLuint
*dst
= (GLuint
*) destination
;
1357 dst
[i
] = (((GLuint
) (rgba
[i
][RCOMP
] * 1023.0F
)) << 22)
1358 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 12)
1359 | (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) << 2)
1360 | (((GLuint
) (rgba
[i
][ACOMP
] * 3.0F
)) );
1363 else if (format
== GL_BGRA
) {
1364 GLuint
*dst
= (GLuint
*) destination
;
1366 dst
[i
] = (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) << 22)
1367 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 12)
1368 | (((GLuint
) (rgba
[i
][RCOMP
] * 1023.0F
)) << 2)
1369 | (((GLuint
) (rgba
[i
][ACOMP
] * 3.0F
)) );
1372 else if (format
== GL_ABGR_EXT
) {
1373 GLuint
*dst
= (GLuint
*) destination
;
1375 dst
[i
] = (((GLuint
) (rgba
[i
][ACOMP
] * 1023.0F
)) << 22)
1376 | (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) << 12)
1377 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 2)
1378 | (((GLuint
) (rgba
[i
][RCOMP
] * 3.0F
)) );
1382 case GL_UNSIGNED_INT_2_10_10_10_REV
:
1383 if (format
== GL_RGBA
) {
1384 GLuint
*dst
= (GLuint
*) destination
;
1386 dst
[i
] = (((GLuint
) (rgba
[i
][RCOMP
] * 1023.0F
)) )
1387 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 10)
1388 | (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) << 20)
1389 | (((GLuint
) (rgba
[i
][ACOMP
] * 3.0F
)) << 30);
1392 else if (format
== GL_BGRA
) {
1393 GLuint
*dst
= (GLuint
*) destination
;
1395 dst
[i
] = (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) )
1396 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 10)
1397 | (((GLuint
) (rgba
[i
][RCOMP
] * 1023.0F
)) << 20)
1398 | (((GLuint
) (rgba
[i
][ACOMP
] * 3.0F
)) << 30);
1401 else if (format
== GL_ABGR_EXT
) {
1402 GLuint
*dst
= (GLuint
*) destination
;
1404 dst
[i
] = (((GLuint
) (rgba
[i
][ACOMP
] * 1023.0F
)) )
1405 | (((GLuint
) (rgba
[i
][BCOMP
] * 1023.0F
)) << 10)
1406 | (((GLuint
) (rgba
[i
][GCOMP
] * 1023.0F
)) << 20)
1407 | (((GLuint
) (rgba
[i
][RCOMP
] * 3.0F
)) << 30);
1412 gl_problem( ctx
, "bad type in _mesa_pack_rgba_span" );
1419 #define SWAP2BYTE(VALUE) \
1421 GLubyte *bytes = (GLubyte *) &(VALUE); \
1422 GLubyte tmp = bytes[0]; \
1423 bytes[0] = bytes[1]; \
1427 #define SWAP4BYTE(VALUE) \
1429 GLubyte *bytes = (GLubyte *) &(VALUE); \
1430 GLubyte tmp = bytes[0]; \
1431 bytes[0] = bytes[3]; \
1434 bytes[1] = bytes[2]; \
1440 extract_uint_indexes(GLuint n
, GLuint indexes
[],
1441 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
1442 const struct gl_pixelstore_attrib
*unpack
)
1444 assert(srcFormat
== GL_COLOR_INDEX
);
1446 ASSERT(srcType
== GL_BITMAP
||
1447 srcType
== GL_UNSIGNED_BYTE
||
1448 srcType
== GL_BYTE
||
1449 srcType
== GL_UNSIGNED_SHORT
||
1450 srcType
== GL_SHORT
||
1451 srcType
== GL_UNSIGNED_INT
||
1452 srcType
== GL_INT
||
1453 srcType
== GL_FLOAT
);
1458 GLubyte
*ubsrc
= (GLubyte
*) src
;
1459 if (unpack
->LsbFirst
) {
1460 GLubyte mask
= 1 << (unpack
->SkipPixels
& 0x7);
1462 for (i
= 0; i
< n
; i
++) {
1463 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
1474 GLubyte mask
= 128 >> (unpack
->SkipPixels
& 0x7);
1476 for (i
= 0; i
< n
; i
++) {
1477 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
1489 case GL_UNSIGNED_BYTE
:
1492 const GLubyte
*s
= (const GLubyte
*) src
;
1493 for (i
= 0; i
< n
; i
++)
1500 const GLbyte
*s
= (const GLbyte
*) src
;
1501 for (i
= 0; i
< n
; i
++)
1505 case GL_UNSIGNED_SHORT
:
1508 const GLushort
*s
= (const GLushort
*) src
;
1509 if (unpack
->SwapBytes
) {
1510 for (i
= 0; i
< n
; i
++) {
1511 GLushort value
= s
[i
];
1517 for (i
= 0; i
< n
; i
++)
1525 const GLshort
*s
= (const GLshort
*) src
;
1526 if (unpack
->SwapBytes
) {
1527 for (i
= 0; i
< n
; i
++) {
1528 GLshort value
= s
[i
];
1534 for (i
= 0; i
< n
; i
++)
1539 case GL_UNSIGNED_INT
:
1542 const GLuint
*s
= (const GLuint
*) src
;
1543 if (unpack
->SwapBytes
) {
1544 for (i
= 0; i
< n
; i
++) {
1545 GLuint value
= s
[i
];
1551 for (i
= 0; i
< n
; i
++)
1559 const GLint
*s
= (const GLint
*) src
;
1560 if (unpack
->SwapBytes
) {
1561 for (i
= 0; i
< n
; i
++) {
1568 for (i
= 0; i
< n
; i
++)
1576 const GLfloat
*s
= (const GLfloat
*) src
;
1577 if (unpack
->SwapBytes
) {
1578 for (i
= 0; i
< n
; i
++) {
1579 GLfloat value
= s
[i
];
1581 indexes
[i
] = (GLuint
) value
;
1585 for (i
= 0; i
< n
; i
++)
1586 indexes
[i
] = (GLuint
) s
[i
];
1591 gl_problem(NULL
, "bad srcType in extract_uint_indexes");
1599 * This function extracts floating point RGBA values from arbitrary
1600 * image data. srcFormat and srcType are the format and type parameters
1601 * passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
1603 * Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
1604 * implements the "Conversion to floating point", "Conversion to RGB",
1605 * and "Final Expansion to RGBA" operations.
1607 * Args: n - number of pixels
1608 * rgba - output colors
1609 * srcFormat - format of incoming data
1610 * srcType - datatype of incoming data
1611 * src - source data pointer
1612 * swapBytes - perform byteswapping of incoming data?
1615 extract_float_rgba(GLuint n
, GLfloat rgba
[][4],
1616 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
1617 GLboolean swapBytes
)
1619 GLint redIndex
, greenIndex
, blueIndex
, alphaIndex
;
1621 GLint rComp
, bComp
, gComp
, aComp
;
1623 ASSERT(srcFormat
== GL_RED
||
1624 srcFormat
== GL_GREEN
||
1625 srcFormat
== GL_BLUE
||
1626 srcFormat
== GL_ALPHA
||
1627 srcFormat
== GL_LUMINANCE
||
1628 srcFormat
== GL_LUMINANCE_ALPHA
||
1629 srcFormat
== GL_INTENSITY
||
1630 srcFormat
== GL_RGB
||
1631 srcFormat
== GL_BGR
||
1632 srcFormat
== GL_RGBA
||
1633 srcFormat
== GL_BGRA
||
1634 srcFormat
== GL_ABGR_EXT
);
1636 ASSERT(srcType
== GL_UNSIGNED_BYTE
||
1637 srcType
== GL_BYTE
||
1638 srcType
== GL_UNSIGNED_SHORT
||
1639 srcType
== GL_SHORT
||
1640 srcType
== GL_UNSIGNED_INT
||
1641 srcType
== GL_INT
||
1642 srcType
== GL_FLOAT
||
1643 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
1644 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
1645 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
1646 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
1647 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
1648 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
1649 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
1650 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
1651 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
1652 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
1653 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
1654 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
1656 rComp
= gComp
= bComp
= aComp
= -1;
1658 switch (srcFormat
) {
1661 greenIndex
= blueIndex
= alphaIndex
= -1;
1666 redIndex
= blueIndex
= alphaIndex
= -1;
1671 redIndex
= greenIndex
= alphaIndex
= -1;
1675 redIndex
= greenIndex
= blueIndex
= -1;
1680 redIndex
= greenIndex
= blueIndex
= 0;
1684 case GL_LUMINANCE_ALPHA
:
1685 redIndex
= greenIndex
= blueIndex
= 0;
1691 greenIndex
= blueIndex
= alphaIndex
= -1;
1742 gl_problem(NULL
, "bad srcFormat in extract float data");
1747 #define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION) \
1748 if ((INDEX) < 0) { \
1750 for (i = 0; i < n; i++) { \
1751 rgba[i][CHANNEL] = DEFAULT; \
1754 else if (swapBytes) { \
1755 const TYPE *s = (const TYPE *) src; \
1757 for (i = 0; i < n; i++) { \
1758 TYPE value = s[INDEX]; \
1759 if (sizeof(TYPE) == 2) { \
1762 else if (sizeof(TYPE) == 4) { \
1765 rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
1770 const TYPE *s = (const TYPE *) src; \
1772 for (i = 0; i < n; i++) { \
1773 rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
1779 case GL_UNSIGNED_BYTE
:
1780 PROCESS(redIndex
, RCOMP
, 0.0F
, GLubyte
, UBYTE_TO_FLOAT
);
1781 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLubyte
, UBYTE_TO_FLOAT
);
1782 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLubyte
, UBYTE_TO_FLOAT
);
1783 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLubyte
, UBYTE_TO_FLOAT
);
1786 PROCESS(redIndex
, RCOMP
, 0.0F
, GLbyte
, BYTE_TO_FLOAT
);
1787 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLbyte
, BYTE_TO_FLOAT
);
1788 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLbyte
, BYTE_TO_FLOAT
);
1789 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLbyte
, BYTE_TO_FLOAT
);
1791 case GL_UNSIGNED_SHORT
:
1792 PROCESS(redIndex
, RCOMP
, 0.0F
, GLushort
, USHORT_TO_FLOAT
);
1793 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLushort
, USHORT_TO_FLOAT
);
1794 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLushort
, USHORT_TO_FLOAT
);
1795 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLushort
, USHORT_TO_FLOAT
);
1798 PROCESS(redIndex
, RCOMP
, 0.0F
, GLshort
, SHORT_TO_FLOAT
);
1799 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLshort
, SHORT_TO_FLOAT
);
1800 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLshort
, SHORT_TO_FLOAT
);
1801 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLshort
, SHORT_TO_FLOAT
);
1803 case GL_UNSIGNED_INT
:
1804 PROCESS(redIndex
, RCOMP
, 0.0F
, GLuint
, UINT_TO_FLOAT
);
1805 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLuint
, UINT_TO_FLOAT
);
1806 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLuint
, UINT_TO_FLOAT
);
1807 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLuint
, UINT_TO_FLOAT
);
1810 PROCESS(redIndex
, RCOMP
, 0.0F
, GLint
, INT_TO_FLOAT
);
1811 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLint
, INT_TO_FLOAT
);
1812 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLint
, INT_TO_FLOAT
);
1813 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLint
, INT_TO_FLOAT
);
1816 PROCESS(redIndex
, RCOMP
, 0.0F
, GLfloat
, (GLfloat
));
1817 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLfloat
, (GLfloat
));
1818 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLfloat
, (GLfloat
));
1819 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLfloat
, (GLfloat
));
1821 case GL_UNSIGNED_BYTE_3_3_2
:
1823 const GLubyte
*ubsrc
= (const GLubyte
*) src
;
1825 for (i
= 0; i
< n
; i
++) {
1826 GLubyte p
= ubsrc
[i
];
1827 rgba
[i
][RCOMP
] = ((p
>> 5) ) * (1.0F
/ 7.0F
);
1828 rgba
[i
][GCOMP
] = ((p
>> 2) & 0x7) * (1.0F
/ 7.0F
);
1829 rgba
[i
][BCOMP
] = ((p
) & 0x3) * (1.0F
/ 3.0F
);
1830 rgba
[i
][ACOMP
] = 1.0F
;
1834 case GL_UNSIGNED_BYTE_2_3_3_REV
:
1836 const GLubyte
*ubsrc
= (const GLubyte
*) src
;
1838 for (i
= 0; i
< n
; i
++) {
1839 GLubyte p
= ubsrc
[i
];
1840 rgba
[i
][RCOMP
] = ((p
) & 0x7) * (1.0F
/ 7.0F
);
1841 rgba
[i
][GCOMP
] = ((p
>> 3) & 0x7) * (1.0F
/ 7.0F
);
1842 rgba
[i
][BCOMP
] = ((p
>> 6) ) * (1.0F
/ 3.0F
);
1843 rgba
[i
][ACOMP
] = 1.0F
;
1847 case GL_UNSIGNED_SHORT_5_6_5
:
1849 const GLushort
*ussrc
= (const GLushort
*) src
;
1851 for (i
= 0; i
< n
; i
++) {
1852 GLushort p
= ussrc
[i
];
1854 rgba
[i
][RCOMP
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
1855 rgba
[i
][GCOMP
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
1856 rgba
[i
][BCOMP
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
1857 rgba
[i
][ACOMP
] = 1.0F
;
1861 const GLushort
*ussrc
= (const GLushort
*) src
;
1863 for (i
= 0; i
< n
; i
++) {
1864 GLushort p
= ussrc
[i
];
1865 rgba
[i
][RCOMP
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
1866 rgba
[i
][GCOMP
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
1867 rgba
[i
][BCOMP
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
1868 rgba
[i
][ACOMP
] = 1.0F
;
1872 case GL_UNSIGNED_SHORT_5_6_5_REV
:
1874 const GLushort
*ussrc
= (const GLushort
*) src
;
1876 for (i
= 0; i
< n
; i
++) {
1877 GLushort p
= ussrc
[i
];
1879 rgba
[i
][RCOMP
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
1880 rgba
[i
][GCOMP
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
1881 rgba
[i
][BCOMP
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
1882 rgba
[i
][ACOMP
] = 1.0F
;
1886 const GLushort
*ussrc
= (const GLushort
*) src
;
1888 for (i
= 0; i
< n
; i
++) {
1889 GLushort p
= ussrc
[i
];
1890 rgba
[i
][RCOMP
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
1891 rgba
[i
][GCOMP
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
1892 rgba
[i
][BCOMP
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
1893 rgba
[i
][ACOMP
] = 1.0F
;
1897 case GL_UNSIGNED_SHORT_4_4_4_4
:
1899 const GLushort
*ussrc
= (const GLushort
*) src
;
1901 for (i
= 0; i
< n
; i
++) {
1902 GLushort p
= ussrc
[i
];
1904 rgba
[i
][rComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
1905 rgba
[i
][gComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
1906 rgba
[i
][bComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
1907 rgba
[i
][aComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
1911 const GLushort
*ussrc
= (const GLushort
*) src
;
1913 for (i
= 0; i
< n
; i
++) {
1914 GLushort p
= ussrc
[i
];
1915 rgba
[i
][rComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
1916 rgba
[i
][gComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
1917 rgba
[i
][bComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
1918 rgba
[i
][aComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
1922 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
1924 const GLushort
*ussrc
= (const GLushort
*) src
;
1926 for (i
= 0; i
< n
; i
++) {
1927 GLushort p
= ussrc
[i
];
1929 rgba
[i
][rComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
1930 rgba
[i
][gComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
1931 rgba
[i
][bComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
1932 rgba
[i
][aComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
1936 const GLushort
*ussrc
= (const GLushort
*) src
;
1938 for (i
= 0; i
< n
; i
++) {
1939 GLushort p
= ussrc
[i
];
1940 rgba
[i
][rComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
1941 rgba
[i
][gComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
1942 rgba
[i
][bComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
1943 rgba
[i
][aComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
1947 case GL_UNSIGNED_SHORT_5_5_5_1
:
1949 const GLushort
*ussrc
= (const GLushort
*) src
;
1951 for (i
= 0; i
< n
; i
++) {
1952 GLushort p
= ussrc
[i
];
1954 rgba
[i
][rComp
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
1955 rgba
[i
][gComp
] = ((p
>> 6) & 0x1f) * (1.0F
/ 31.0F
);
1956 rgba
[i
][bComp
] = ((p
>> 1) & 0x1f) * (1.0F
/ 31.0F
);
1957 rgba
[i
][aComp
] = ((p
) & 0x1) * (1.0F
/ 1.0F
);
1961 const GLushort
*ussrc
= (const GLushort
*) src
;
1963 for (i
= 0; i
< n
; i
++) {
1964 GLushort p
= ussrc
[i
];
1965 rgba
[i
][rComp
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
1966 rgba
[i
][gComp
] = ((p
>> 6) & 0x1f) * (1.0F
/ 31.0F
);
1967 rgba
[i
][bComp
] = ((p
>> 1) & 0x1f) * (1.0F
/ 31.0F
);
1968 rgba
[i
][aComp
] = ((p
) & 0x1) * (1.0F
/ 1.0F
);
1972 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
1974 const GLushort
*ussrc
= (const GLushort
*) src
;
1976 for (i
= 0; i
< n
; i
++) {
1977 GLushort p
= ussrc
[i
];
1979 rgba
[i
][rComp
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
1980 rgba
[i
][gComp
] = ((p
>> 5) & 0x1f) * (1.0F
/ 31.0F
);
1981 rgba
[i
][bComp
] = ((p
>> 10) & 0x1f) * (1.0F
/ 31.0F
);
1982 rgba
[i
][aComp
] = ((p
>> 15) ) * (1.0F
/ 1.0F
);
1986 const GLushort
*ussrc
= (const GLushort
*) src
;
1988 for (i
= 0; i
< n
; i
++) {
1989 GLushort p
= ussrc
[i
];
1990 rgba
[i
][rComp
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
1991 rgba
[i
][gComp
] = ((p
>> 5) & 0x1f) * (1.0F
/ 31.0F
);
1992 rgba
[i
][bComp
] = ((p
>> 10) & 0x1f) * (1.0F
/ 31.0F
);
1993 rgba
[i
][aComp
] = ((p
>> 15) ) * (1.0F
/ 1.0F
);
1997 case GL_UNSIGNED_INT_8_8_8_8
:
1999 const GLuint
*uisrc
= (const GLuint
*) src
;
2001 for (i
= 0; i
< n
; i
++) {
2002 GLuint p
= uisrc
[i
];
2003 rgba
[i
][rComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
) & 0xff);
2004 rgba
[i
][gComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 8) & 0xff);
2005 rgba
[i
][bComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 16) & 0xff);
2006 rgba
[i
][aComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 24) );
2010 const GLuint
*uisrc
= (const GLuint
*) src
;
2012 for (i
= 0; i
< n
; i
++) {
2013 GLuint p
= uisrc
[i
];
2014 rgba
[i
][rComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 24) );
2015 rgba
[i
][gComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 16) & 0xff);
2016 rgba
[i
][bComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 8) & 0xff);
2017 rgba
[i
][aComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
) & 0xff);
2021 case GL_UNSIGNED_INT_8_8_8_8_REV
:
2023 const GLuint
*uisrc
= (const GLuint
*) src
;
2025 for (i
= 0; i
< n
; i
++) {
2026 GLuint p
= uisrc
[i
];
2027 rgba
[i
][rComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 24) );
2028 rgba
[i
][gComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 16) & 0xff);
2029 rgba
[i
][bComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 8) & 0xff);
2030 rgba
[i
][aComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
) & 0xff);
2034 const GLuint
*uisrc
= (const GLuint
*) src
;
2036 for (i
= 0; i
< n
; i
++) {
2037 GLuint p
= uisrc
[i
];
2038 rgba
[i
][rComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
) & 0xff);
2039 rgba
[i
][gComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 8) & 0xff);
2040 rgba
[i
][bComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 16) & 0xff);
2041 rgba
[i
][aComp
] = UBYTE_COLOR_TO_FLOAT_COLOR((p
>> 24) );
2045 case GL_UNSIGNED_INT_10_10_10_2
:
2047 const GLuint
*uisrc
= (const GLuint
*) src
;
2049 for (i
= 0; i
< n
; i
++) {
2050 GLuint p
= uisrc
[i
];
2052 rgba
[i
][rComp
] = ((p
>> 22) ) * (1.0F
/ 1023.0F
);
2053 rgba
[i
][gComp
] = ((p
>> 12) & 0x3ff) * (1.0F
/ 1023.0F
);
2054 rgba
[i
][bComp
] = ((p
>> 2) & 0x3ff) * (1.0F
/ 1023.0F
);
2055 rgba
[i
][aComp
] = ((p
) & 0x3 ) * (1.0F
/ 3.0F
);
2059 const GLuint
*uisrc
= (const GLuint
*) src
;
2061 for (i
= 0; i
< n
; i
++) {
2062 GLuint p
= uisrc
[i
];
2063 rgba
[i
][rComp
] = ((p
>> 22) ) * (1.0F
/ 1023.0F
);
2064 rgba
[i
][gComp
] = ((p
>> 12) & 0x3ff) * (1.0F
/ 1023.0F
);
2065 rgba
[i
][bComp
] = ((p
>> 2) & 0x3ff) * (1.0F
/ 1023.0F
);
2066 rgba
[i
][aComp
] = ((p
) & 0x3 ) * (1.0F
/ 3.0F
);
2070 case GL_UNSIGNED_INT_2_10_10_10_REV
:
2072 const GLuint
*uisrc
= (const GLuint
*) src
;
2074 for (i
= 0; i
< n
; i
++) {
2075 GLuint p
= uisrc
[i
];
2077 rgba
[i
][rComp
] = ((p
) & 0x3ff) * (1.0F
/ 1023.0F
);
2078 rgba
[i
][gComp
] = ((p
>> 10) & 0x3ff) * (1.0F
/ 1023.0F
);
2079 rgba
[i
][bComp
] = ((p
>> 20) & 0x3ff) * (1.0F
/ 1023.0F
);
2080 rgba
[i
][aComp
] = ((p
>> 30) ) * (1.0F
/ 3.0F
);
2084 const GLuint
*uisrc
= (const GLuint
*) src
;
2086 for (i
= 0; i
< n
; i
++) {
2087 GLuint p
= uisrc
[i
];
2088 rgba
[i
][rComp
] = ((p
) & 0x3ff) * (1.0F
/ 1023.0F
);
2089 rgba
[i
][gComp
] = ((p
>> 10) & 0x3ff) * (1.0F
/ 1023.0F
);
2090 rgba
[i
][bComp
] = ((p
>> 20) & 0x3ff) * (1.0F
/ 1023.0F
);
2091 rgba
[i
][aComp
] = ((p
>> 30) ) * (1.0F
/ 3.0F
);
2096 gl_problem(NULL
, "bad srcType in extract float data");
2104 * Unpack a row of color image data from a client buffer according to
2105 * the pixel unpacking parameters. Apply any enabled pixel transfer
2106 * ops (PixelMap, scale/bias) if the applyTransferOps flag is enabled.
2107 * Return GLubyte values in the specified dest image format.
2108 * This is (or will be) used by glDrawPixels and glTexImage?D().
2109 * Input: ctx - the context
2110 * n - number of pixels in the span
2111 * dstFormat - format of destination color array
2112 * dest - the destination color array
2113 * srcFormat - source image format
2114 * srcType - source image datatype
2115 * source - source image pointer
2116 * unpacking - pixel unpacking parameters
2117 * applyTransferOps - apply scale/bias/lookup-table ops?
2119 * XXX perhaps expand this to process whole images someday.
2122 _mesa_unpack_ubyte_color_span( const GLcontext
*ctx
,
2123 GLuint n
, GLenum dstFormat
, GLubyte dest
[],
2124 GLenum srcFormat
, GLenum srcType
,
2125 const GLvoid
*source
,
2126 const struct gl_pixelstore_attrib
*unpacking
,
2127 GLboolean applyTransferOps
)
2129 ASSERT(dstFormat
== GL_ALPHA
||
2130 dstFormat
== GL_LUMINANCE
||
2131 dstFormat
== GL_LUMINANCE_ALPHA
||
2132 dstFormat
== GL_INTENSITY
||
2133 dstFormat
== GL_RGB
||
2134 dstFormat
== GL_RGBA
||
2135 dstFormat
== GL_COLOR_INDEX
);
2137 ASSERT(srcFormat
== GL_RED
||
2138 srcFormat
== GL_GREEN
||
2139 srcFormat
== GL_BLUE
||
2140 srcFormat
== GL_ALPHA
||
2141 srcFormat
== GL_LUMINANCE
||
2142 srcFormat
== GL_LUMINANCE_ALPHA
||
2143 srcFormat
== GL_INTENSITY
||
2144 srcFormat
== GL_RGB
||
2145 srcFormat
== GL_BGR
||
2146 srcFormat
== GL_RGBA
||
2147 srcFormat
== GL_BGRA
||
2148 srcFormat
== GL_ABGR_EXT
||
2149 srcFormat
== GL_COLOR_INDEX
);
2151 ASSERT(srcType
== GL_BITMAP
||
2152 srcType
== GL_UNSIGNED_BYTE
||
2153 srcType
== GL_BYTE
||
2154 srcType
== GL_UNSIGNED_SHORT
||
2155 srcType
== GL_SHORT
||
2156 srcType
== GL_UNSIGNED_INT
||
2157 srcType
== GL_INT
||
2158 srcType
== GL_FLOAT
||
2159 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
2160 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
2161 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
2162 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
2163 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
2164 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
2165 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
2166 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
2167 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
2168 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
2169 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
2170 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
2172 /* this is intended for RGBA mode only */
2173 assert(ctx
->Visual
->RGBAflag
);
2175 applyTransferOps
&= (ctx
->Pixel
.ScaleOrBiasRGBA
||
2176 ctx
->Pixel
.MapColorFlag
||
2177 ctx
->ColorMatrix
.type
!= MATRIX_IDENTITY
||
2178 ctx
->Pixel
.ScaleOrBiasRGBApcm
||
2179 ctx
->Pixel
.ColorTableEnabled
);
2181 /* Try simple cases first */
2182 if (!applyTransferOps
&& srcType
== GL_UNSIGNED_BYTE
) {
2183 if (dstFormat
== GL_RGBA
) {
2184 if (srcFormat
== GL_RGBA
) {
2185 MEMCPY( dest
, source
, n
* 4 * sizeof(GLubyte
) );
2188 else if (srcFormat
== GL_RGB
) {
2190 const GLubyte
*src
= (const GLubyte
*) source
;
2191 GLubyte
*dst
= dest
;
2192 for (i
= 0; i
< n
; i
++) {
2203 else if (dstFormat
== GL_RGB
) {
2204 if (srcFormat
== GL_RGB
) {
2205 MEMCPY( dest
, source
, n
* 3 * sizeof(GLubyte
) );
2208 else if (srcFormat
== GL_RGBA
) {
2210 const GLubyte
*src
= (const GLubyte
*) source
;
2211 GLubyte
*dst
= dest
;
2212 for (i
= 0; i
< n
; i
++) {
2222 else if (dstFormat
== srcFormat
) {
2223 GLint comps
= _mesa_components_in_format(srcFormat
);
2225 MEMCPY( dest
, source
, n
* comps
* sizeof(GLubyte
) );
2231 /* general solution begins here */
2233 GLfloat rgba
[MAX_WIDTH
][4];
2234 GLint dstComponents
;
2235 GLint dstRedIndex
, dstGreenIndex
, dstBlueIndex
, dstAlphaIndex
;
2236 GLint dstLuminanceIndex
, dstIntensityIndex
;
2238 dstComponents
= _mesa_components_in_format( dstFormat
);
2239 /* source & dest image formats should have been error checked by now */
2240 assert(dstComponents
> 0);
2243 * Extract image data and convert to RGBA floats
2245 assert(n
<= MAX_WIDTH
);
2246 if (srcFormat
== GL_COLOR_INDEX
) {
2247 GLuint indexes
[MAX_WIDTH
];
2248 extract_uint_indexes(n
, indexes
, srcFormat
, srcType
, source
,
2251 /* shift and offset indexes */
2252 _mesa_shift_and_offset_ci(ctx
, n
, indexes
);
2254 if (dstFormat
== GL_COLOR_INDEX
) {
2255 if (applyTransferOps
) {
2256 if (ctx
->Pixel
.MapColorFlag
) {
2257 /* Apply lookup table */
2258 _mesa_map_ci(ctx
, n
, indexes
);
2260 if (ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
) {
2261 _mesa_shift_and_offset_ci(ctx
, n
, indexes
);
2264 /* convert to GLubyte and return */
2267 for (i
= 0; i
< n
; i
++) {
2268 dest
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
2273 /* Convert indexes to RGBA */
2274 _mesa_map_ci_to_rgba(ctx
, n
, indexes
, rgba
);
2278 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
2279 unpacking
->SwapBytes
);
2281 if (applyTransferOps
) {
2282 /* scale and bias colors */
2283 _mesa_scale_and_bias_rgba(ctx
, n
, rgba
);
2284 /* color table lookup */
2285 if (ctx
->Pixel
.MapColorFlag
) {
2286 _mesa_map_rgba(ctx
, n
, rgba
);
2288 /* color matrix transform */
2289 if (ctx
->ColorMatrix
.type
!= MATRIX_IDENTITY
||
2290 ctx
->Pixel
.ScaleOrBiasRGBApcm
) {
2291 _mesa_transform_rgba(ctx
, n
, rgba
);
2293 /* GL_SGI_color_table lookup */
2294 if (ctx
->Pixel
.ColorTableEnabled
) {
2295 _mesa_lookup_rgba(&ctx
->ColorTable
, n
, rgba
);
2300 /* clamp to [0,1] */
2303 for (i
= 0; i
< n
; i
++) {
2304 rgba
[i
][RCOMP
] = CLAMP(rgba
[i
][RCOMP
], 0.0F
, 1.0F
);
2305 rgba
[i
][GCOMP
] = CLAMP(rgba
[i
][GCOMP
], 0.0F
, 1.0F
);
2306 rgba
[i
][BCOMP
] = CLAMP(rgba
[i
][BCOMP
], 0.0F
, 1.0F
);
2307 rgba
[i
][ACOMP
] = CLAMP(rgba
[i
][ACOMP
], 0.0F
, 1.0F
);
2311 /* Now determine which color channels we need to produce.
2312 * And determine the dest index (offset) within each color tuple.
2314 switch (dstFormat
) {
2317 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
2318 dstLuminanceIndex
= dstIntensityIndex
= -1;
2321 dstLuminanceIndex
= 0;
2322 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
2323 dstIntensityIndex
= -1;
2325 case GL_LUMINANCE_ALPHA
:
2326 dstLuminanceIndex
= 0;
2328 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
2329 dstIntensityIndex
= -1;
2332 dstIntensityIndex
= 0;
2333 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
2334 dstLuminanceIndex
= -1;
2340 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
2347 dstLuminanceIndex
= dstIntensityIndex
= -1;
2350 gl_problem(ctx
, "bad dstFormat in _mesa_unpack_ubyte_span()");
2355 /* Now return the GLubyte data in the requested dstFormat */
2357 if (dstRedIndex
>= 0) {
2358 GLubyte
*dst
= dest
;
2360 for (i
= 0; i
< n
; i
++) {
2361 dst
[dstRedIndex
] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2362 dst
+= dstComponents
;
2366 if (dstGreenIndex
>= 0) {
2367 GLubyte
*dst
= dest
;
2369 for (i
= 0; i
< n
; i
++) {
2370 dst
[dstGreenIndex
] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2371 dst
+= dstComponents
;
2375 if (dstBlueIndex
>= 0) {
2376 GLubyte
*dst
= dest
;
2378 for (i
= 0; i
< n
; i
++) {
2379 dst
[dstBlueIndex
] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2380 dst
+= dstComponents
;
2384 if (dstAlphaIndex
>= 0) {
2385 GLubyte
*dst
= dest
;
2387 for (i
= 0; i
< n
; i
++) {
2388 dst
[dstAlphaIndex
] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2389 dst
+= dstComponents
;
2393 if (dstIntensityIndex
>= 0) {
2394 GLubyte
*dst
= dest
;
2396 assert(dstIntensityIndex
== 0);
2397 assert(dstComponents
== 1);
2398 for (i
= 0; i
< n
; i
++) {
2399 /* Intensity comes from red channel */
2400 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2404 if (dstLuminanceIndex
>= 0) {
2405 GLubyte
*dst
= dest
;
2407 assert(dstLuminanceIndex
== 0);
2408 for (i
= 0; i
< n
; i
++) {
2409 /* Luminance comes from red channel */
2410 dst
[0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2411 dst
+= dstComponents
;
2420 * Unpack a row of color index data from a client buffer according to
2421 * the pixel unpacking parameters. Apply pixel transfer ops if enabled
2422 * and applyTransferOps is true.
2423 * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
2425 * Args: ctx - the context
2426 * n - number of pixels
2427 * dstType - destination datatype
2428 * dest - destination array
2429 * srcType - source pixel type
2430 * source - source data pointer
2431 * unpacking - pixel unpacking parameters
2432 * applyTransferOps - apply offset/bias/lookup ops?
2435 _mesa_unpack_index_span( const GLcontext
*ctx
, GLuint n
,
2436 GLenum dstType
, GLvoid
*dest
,
2437 GLenum srcType
, const GLvoid
*source
,
2438 const struct gl_pixelstore_attrib
*unpacking
,
2439 GLboolean applyTransferOps
)
2441 ASSERT(srcType
== GL_BITMAP
||
2442 srcType
== GL_UNSIGNED_BYTE
||
2443 srcType
== GL_BYTE
||
2444 srcType
== GL_UNSIGNED_SHORT
||
2445 srcType
== GL_SHORT
||
2446 srcType
== GL_UNSIGNED_INT
||
2447 srcType
== GL_INT
||
2448 srcType
== GL_FLOAT
);
2450 ASSERT(dstType
== GL_UNSIGNED_BYTE
||
2451 dstType
== GL_UNSIGNED_SHORT
||
2452 dstType
== GL_UNSIGNED_INT
);
2454 applyTransferOps
&= (ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
|| ctx
->Pixel
.MapColorFlag
);
2457 * Try simple cases first
2459 if (!applyTransferOps
&& srcType
== GL_UNSIGNED_BYTE
2460 && dstType
== GL_UNSIGNED_BYTE
) {
2461 MEMCPY(dest
, source
, n
* sizeof(GLubyte
));
2463 else if (!applyTransferOps
&& srcType
== GL_UNSIGNED_INT
2464 && dstType
== GL_UNSIGNED_INT
&& !unpacking
->SwapBytes
) {
2465 MEMCPY(dest
, source
, n
* sizeof(GLuint
));
2471 GLuint indexes
[MAX_WIDTH
];
2472 assert(n
<= MAX_WIDTH
);
2474 extract_uint_indexes(n
, indexes
, GL_COLOR_INDEX
, srcType
, source
,
2477 if (applyTransferOps
) {
2478 if (ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
) {
2479 /* shift and offset indexes */
2480 _mesa_shift_and_offset_ci(ctx
, n
, indexes
);
2482 if (ctx
->Pixel
.MapColorFlag
) {
2483 /* Apply lookup table */
2484 _mesa_map_ci(ctx
, n
, indexes
);
2488 /* convert to dest type */
2490 case GL_UNSIGNED_BYTE
:
2492 GLubyte
*dst
= (GLubyte
*) dest
;
2494 for (i
= 0; i
< n
; i
++) {
2495 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
2499 case GL_UNSIGNED_SHORT
:
2501 GLuint
*dst
= (GLuint
*) dest
;
2503 for (i
= 0; i
< n
; i
++) {
2504 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
2508 case GL_UNSIGNED_INT
:
2509 MEMCPY(dest
, indexes
, n
* sizeof(GLuint
));
2512 gl_problem(ctx
, "bad dstType in _mesa_unpack_index_span");
2519 * Unpack a row of stencil data from a client buffer according to
2520 * the pixel unpacking parameters. Apply pixel transfer ops if enabled
2521 * and applyTransferOps is true.
2522 * This is (or will be) used by glDrawPixels
2524 * Args: ctx - the context
2525 * n - number of pixels
2526 * dstType - destination datatype
2527 * dest - destination array
2528 * srcType - source pixel type
2529 * source - source data pointer
2530 * unpacking - pixel unpacking parameters
2531 * applyTransferOps - apply offset/bias/lookup ops?
2534 _mesa_unpack_stencil_span( const GLcontext
*ctx
, GLuint n
,
2535 GLenum dstType
, GLvoid
*dest
,
2536 GLenum srcType
, const GLvoid
*source
,
2537 const struct gl_pixelstore_attrib
*unpacking
,
2538 GLboolean applyTransferOps
)
2540 ASSERT(srcType
== GL_BITMAP
||
2541 srcType
== GL_UNSIGNED_BYTE
||
2542 srcType
== GL_BYTE
||
2543 srcType
== GL_UNSIGNED_SHORT
||
2544 srcType
== GL_SHORT
||
2545 srcType
== GL_UNSIGNED_INT
||
2546 srcType
== GL_INT
||
2547 srcType
== GL_FLOAT
);
2549 ASSERT(dstType
== GL_UNSIGNED_BYTE
||
2550 dstType
== GL_UNSIGNED_SHORT
||
2551 dstType
== GL_UNSIGNED_INT
);
2553 applyTransferOps
&= (ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
|| ctx
->Pixel
.MapColorFlag
);
2556 * Try simple cases first
2558 if (!applyTransferOps
&& srcType
== GL_UNSIGNED_BYTE
2559 && dstType
== GL_UNSIGNED_BYTE
) {
2560 MEMCPY(dest
, source
, n
* sizeof(GLubyte
));
2562 else if (!applyTransferOps
&& srcType
== GL_UNSIGNED_INT
2563 && dstType
== GL_UNSIGNED_INT
&& !unpacking
->SwapBytes
) {
2564 MEMCPY(dest
, source
, n
* sizeof(GLuint
));
2570 GLuint indexes
[MAX_WIDTH
];
2571 assert(n
<= MAX_WIDTH
);
2573 extract_uint_indexes(n
, indexes
, GL_COLOR_INDEX
, srcType
, source
,
2576 if (applyTransferOps
) {
2577 if (ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
) {
2578 /* shift and offset indexes */
2579 _mesa_shift_and_offset_ci(ctx
, n
, indexes
);
2582 if (ctx
->Pixel
.MapStencilFlag
) {
2583 /* Apply stencil lookup table */
2584 GLuint mask
= ctx
->Pixel
.MapStoSsize
- 1;
2587 indexes
[i
] = ctx
->Pixel
.MapStoS
[ indexes
[i
] & mask
];
2592 /* convert to dest type */
2594 case GL_UNSIGNED_BYTE
:
2596 GLubyte
*dst
= (GLubyte
*) dest
;
2598 for (i
= 0; i
< n
; i
++) {
2599 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
2603 case GL_UNSIGNED_SHORT
:
2605 GLuint
*dst
= (GLuint
*) dest
;
2607 for (i
= 0; i
< n
; i
++) {
2608 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
2612 case GL_UNSIGNED_INT
:
2613 MEMCPY(dest
, indexes
, n
* sizeof(GLuint
));
2616 gl_problem(ctx
, "bad dstType in _mesa_unpack_stencil_span");
2624 _mesa_unpack_depth_span( const GLcontext
*ctx
, GLuint n
, GLdepth
*dest
,
2625 GLenum srcType
, const GLvoid
*source
,
2626 const struct gl_pixelstore_attrib
*unpacking
,
2627 GLboolean applyTransferOps
)
2629 GLfloat
*depth
= MALLOC(n
* sizeof(GLfloat
));
2637 const GLubyte
*src
= (const GLubyte
*) source
;
2638 for (i
= 0; i
< n
; i
++) {
2639 depth
[i
] = BYTE_TO_FLOAT(src
[i
]);
2643 case GL_UNSIGNED_BYTE
:
2646 const GLubyte
*src
= (const GLubyte
*) source
;
2647 for (i
= 0; i
< n
; i
++) {
2648 depth
[i
] = UBYTE_TO_FLOAT(src
[i
]);
2655 const GLshort
*src
= (const GLshort
*) source
;
2656 for (i
= 0; i
< n
; i
++) {
2657 depth
[i
] = SHORT_TO_FLOAT(src
[i
]);
2661 case GL_UNSIGNED_SHORT
:
2664 const GLushort
*src
= (const GLushort
*) source
;
2665 for (i
= 0; i
< n
; i
++) {
2666 depth
[i
] = USHORT_TO_FLOAT(src
[i
]);
2673 const GLint
*src
= (const GLint
*) source
;
2674 for (i
= 0; i
< n
; i
++) {
2675 depth
[i
] = INT_TO_FLOAT(src
[i
]);
2679 case GL_UNSIGNED_INT
:
2682 const GLuint
*src
= (const GLuint
*) source
;
2683 for (i
= 0; i
< n
; i
++) {
2684 depth
[i
] = UINT_TO_FLOAT(src
[i
]);
2689 MEMCPY(depth
, source
, n
* sizeof(GLfloat
));
2692 gl_problem(NULL
, "bad type in _mesa_unpack_depth_span()");
2697 /* apply depth scale and bias */
2698 if (ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0) {
2700 for (i
= 0; i
< n
; i
++) {
2701 depth
[i
] = depth
[i
] * ctx
->Pixel
.DepthScale
+ ctx
->Pixel
.DepthBias
;
2705 /* clamp depth values to [0,1] and convert from floats to integers */
2707 const GLfloat zs
= ctx
->Visual
->DepthMaxF
;
2709 for (i
= 0; i
< n
; i
++) {
2710 dest
[i
] = (GLdepth
) (CLAMP(depth
[i
], 0.0F
, 1.0F
) * zs
);
2720 * Unpack image data. Apply byteswapping, byte flipping (bitmap).
2721 * Return all image data in a contiguous block.
2724 _mesa_unpack_image( GLsizei width
, GLsizei height
, GLsizei depth
,
2725 GLenum format
, GLenum type
, const GLvoid
*pixels
,
2726 const struct gl_pixelstore_attrib
*unpack
)
2728 GLint bytesPerRow
, compsPerRow
;
2729 GLboolean flipBytes
, swap2
, swap4
;
2732 return NULL
; /* not necessarily an error */
2734 if (width
<= 0 || height
<= 0 || depth
<= 0)
2735 return NULL
; /* generate error later */
2737 if (format
== GL_BITMAP
) {
2738 bytesPerRow
= (width
+ 7) >> 3;
2739 flipBytes
= !unpack
->LsbFirst
;
2740 swap2
= swap4
= GL_FALSE
;
2744 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
2745 const GLint components
= _mesa_components_in_format(format
);
2747 if (bytesPerPixel
<= 0 || components
<= 0)
2748 return NULL
; /* bad format or type. generate error later */
2749 bytesPerRow
= bytesPerPixel
* width
;
2750 bytesPerComp
= bytesPerPixel
/ components
;
2751 flipBytes
= GL_FALSE
;
2752 swap2
= (bytesPerComp
== 2) && unpack
->SwapBytes
;
2753 swap4
= (bytesPerComp
== 4) && unpack
->SwapBytes
;
2754 compsPerRow
= components
* width
;
2755 assert(compsPerRow
>= width
);
2759 GLubyte
*destBuffer
= MALLOC(bytesPerRow
* height
* depth
);
2763 return NULL
; /* generate GL_OUT_OF_MEMORY later */
2766 for (img
= 0; img
< depth
; img
++) {
2767 for (row
= 0; row
< height
; row
++) {
2768 const GLvoid
*src
= _mesa_image_address(unpack
, pixels
,
2769 width
, height
, format
, type
, img
, row
, 0);
2770 MEMCPY(dst
, src
, bytesPerRow
);
2771 /* byte flipping/swapping */
2773 flip_bytes((GLubyte
*) dst
, bytesPerRow
);
2776 _mesa_swap2((GLushort
*) dst
, compsPerRow
);
2779 _mesa_swap4((GLuint
*) dst
, compsPerRow
);
2790 * Unpack bitmap data. Resulting data will be in most-significant-bit-first
2791 * order with row alignment = 1 byte.
2794 _mesa_unpack_bitmap( GLint width
, GLint height
, const GLubyte
*pixels
,
2795 const struct gl_pixelstore_attrib
*packing
)
2797 GLint bytes
, row
, width_in_bytes
;
2798 GLubyte
*buffer
, *dst
;
2803 /* Alloc dest storage */
2804 bytes
= ((width
+ 7) / 8 * height
);
2805 buffer
= (GLubyte
*) MALLOC( bytes
);
2810 width_in_bytes
= CEILING( width
, 8 );
2812 for (row
= 0; row
< height
; row
++) {
2813 GLubyte
*src
= _mesa_image_address( packing
, pixels
, width
, height
,
2814 GL_COLOR_INDEX
, GL_BITMAP
,
2821 if (packing
->SkipPixels
== 0) {
2822 MEMCPY( dst
, src
, width_in_bytes
);
2823 if (packing
->LsbFirst
) {
2824 flip_bytes( dst
, width_in_bytes
);
2828 /* handling SkipPixels is a bit tricky (no pun intended!) */
2830 if (packing
->LsbFirst
) {
2831 GLubyte srcMask
= 1 << (packing
->SkipPixels
& 0x7);
2832 GLubyte dstMask
= 128;
2836 for (i
= 0; i
< width
; i
++) {
2840 if (srcMask
== 128) {
2845 srcMask
= srcMask
<< 1;
2853 dstMask
= dstMask
>> 1;
2858 GLubyte srcMask
= 128 >> (packing
->SkipPixels
& 0x7);
2859 GLubyte dstMask
= 128;
2863 for (i
= 0; i
< width
; i
++) {
2872 srcMask
= srcMask
>> 1;
2880 dstMask
= dstMask
>> 1;
2885 dst
+= width_in_bytes
;
2896 _mesa_pack_bitmap( GLint width
, GLint height
, const GLubyte
*source
,
2897 GLubyte
*dest
, const struct gl_pixelstore_attrib
*packing
)
2899 GLint row
, width_in_bytes
;
2905 width_in_bytes
= CEILING( width
, 8 );
2907 for (row
= 0; row
< height
; row
++) {
2908 GLubyte
*dst
= _mesa_image_address( packing
, dest
, width
, height
,
2909 GL_COLOR_INDEX
, GL_BITMAP
,
2914 if (packing
->SkipPixels
== 0) {
2915 MEMCPY( dst
, src
, width_in_bytes
);
2916 if (packing
->LsbFirst
) {
2917 flip_bytes( dst
, width_in_bytes
);
2921 /* handling SkipPixels is a bit tricky (no pun intended!) */
2923 if (packing
->LsbFirst
) {
2924 GLubyte srcMask
= 1 << (packing
->SkipPixels
& 0x7);
2925 GLubyte dstMask
= 128;
2926 const GLubyte
*s
= src
;
2929 for (i
= 0; i
< width
; i
++) {
2933 if (srcMask
== 128) {
2938 srcMask
= srcMask
<< 1;
2946 dstMask
= dstMask
>> 1;
2951 GLubyte srcMask
= 128 >> (packing
->SkipPixels
& 0x7);
2952 GLubyte dstMask
= 128;
2953 const GLubyte
*s
= src
;
2956 for (i
= 0; i
< width
; i
++) {
2965 srcMask
= srcMask
>> 1;
2973 dstMask
= dstMask
>> 1;
2978 src
+= width_in_bytes
;