2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
5 * Copyright (C) 2009-2010 VMware, Inc. All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THEA AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
28 * Image and pixel span packing and unpacking.
33 * XXX: MSVC takes forever to compile this module for x86_64 unless we disable
34 * this global optimization.
37 * - http://msdn.microsoft.com/en-us/library/1yk3ydd7.aspx
38 * - http://msdn.microsoft.com/en-us/library/chh3fb0k.aspx
40 #if defined(_MSC_VER) && defined(_M_X64)
41 # pragma optimize( "g", off )
52 #include "pixeltransfer.h"
54 #include "glformats.h"
55 #include "format_utils.h"
56 #include "format_pack.h"
60 * Flip the 8 bits in each byte of the given array.
63 * \param n number of bytes.
65 * \todo try this trick to flip bytes someday:
67 * v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555);
68 * v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333);
69 * v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f);
73 flip_bytes( GLubyte
*p
, GLuint n
)
76 for (i
= 0; i
< n
; i
++) {
77 b
= (GLuint
) p
[i
]; /* words are often faster than bytes */
78 a
= ((b
& 0x01) << 7) |
93 * Unpack a 32x32 pixel polygon stipple from user memory using the
94 * current pixel unpack settings.
97 _mesa_unpack_polygon_stipple( const GLubyte
*pattern
, GLuint dest
[32],
98 const struct gl_pixelstore_attrib
*unpacking
)
100 GLubyte
*ptrn
= (GLubyte
*) _mesa_unpack_image(2, 32, 32, 1, GL_COLOR_INDEX
,
101 GL_BITMAP
, pattern
, unpacking
);
103 /* Convert pattern from GLubytes to GLuints and handle big/little
108 for (i
= 0; i
< 32; i
++) {
109 dest
[i
] = (p
[0] << 24)
121 * Pack polygon stipple into user memory given current pixel packing
125 _mesa_pack_polygon_stipple( const GLuint pattern
[32], GLubyte
*dest
,
126 const struct gl_pixelstore_attrib
*packing
)
128 /* Convert pattern from GLuints to GLubytes to handle big/little
129 * endian differences.
133 for (i
= 0; i
< 32; i
++) {
134 ptrn
[i
* 4 + 0] = (GLubyte
) ((pattern
[i
] >> 24) & 0xff);
135 ptrn
[i
* 4 + 1] = (GLubyte
) ((pattern
[i
] >> 16) & 0xff);
136 ptrn
[i
* 4 + 2] = (GLubyte
) ((pattern
[i
] >> 8 ) & 0xff);
137 ptrn
[i
* 4 + 3] = (GLubyte
) ((pattern
[i
] ) & 0xff);
140 _mesa_pack_bitmap(32, 32, ptrn
, dest
, packing
);
148 _mesa_pack_bitmap( GLint width
, GLint height
, const GLubyte
*source
,
149 GLubyte
*dest
, const struct gl_pixelstore_attrib
*packing
)
151 GLint row
, width_in_bytes
;
157 width_in_bytes
= DIV_ROUND_UP( width
, 8 );
159 for (row
= 0; row
< height
; row
++) {
160 GLubyte
*dst
= (GLubyte
*) _mesa_image_address2d(packing
, dest
,
161 width
, height
, GL_COLOR_INDEX
, GL_BITMAP
, row
, 0);
165 if ((packing
->SkipPixels
& 7) == 0) {
166 memcpy( dst
, src
, width_in_bytes
);
167 if (packing
->LsbFirst
) {
168 flip_bytes( dst
, width_in_bytes
);
172 /* handling SkipPixels is a bit tricky (no pun intended!) */
174 if (packing
->LsbFirst
) {
175 GLubyte srcMask
= 128;
176 GLubyte dstMask
= 1 << (packing
->SkipPixels
& 0x7);
177 const GLubyte
*s
= src
;
180 for (i
= 0; i
< width
; i
++) {
189 srcMask
= srcMask
>> 1;
191 if (dstMask
== 128) {
197 dstMask
= dstMask
<< 1;
202 GLubyte srcMask
= 128;
203 GLubyte dstMask
= 128 >> (packing
->SkipPixels
& 0x7);
204 const GLubyte
*s
= src
;
207 for (i
= 0; i
< width
; i
++) {
216 srcMask
= srcMask
>> 1;
224 dstMask
= dstMask
>> 1;
229 src
+= width_in_bytes
;
234 #define SWAP2BYTE(VALUE) \
236 GLubyte *bytes = (GLubyte *) &(VALUE); \
237 GLubyte tmp = bytes[0]; \
238 bytes[0] = bytes[1]; \
242 #define SWAP4BYTE(VALUE) \
244 GLubyte *bytes = (GLubyte *) &(VALUE); \
245 GLubyte tmp = bytes[0]; \
246 bytes[0] = bytes[3]; \
249 bytes[1] = bytes[2]; \
255 extract_uint_indexes(GLuint n
, GLuint indexes
[],
256 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
257 const struct gl_pixelstore_attrib
*unpack
)
259 assert(srcFormat
== GL_COLOR_INDEX
|| srcFormat
== GL_STENCIL_INDEX
);
261 assert(srcType
== GL_BITMAP
||
262 srcType
== GL_UNSIGNED_BYTE
||
263 srcType
== GL_BYTE
||
264 srcType
== GL_UNSIGNED_SHORT
||
265 srcType
== GL_SHORT
||
266 srcType
== GL_UNSIGNED_INT
||
268 srcType
== GL_UNSIGNED_INT_24_8_EXT
||
269 srcType
== GL_HALF_FLOAT_ARB
||
270 srcType
== GL_HALF_FLOAT_OES
||
271 srcType
== GL_FLOAT
||
272 srcType
== GL_FLOAT_32_UNSIGNED_INT_24_8_REV
);
277 GLubyte
*ubsrc
= (GLubyte
*) src
;
278 if (unpack
->LsbFirst
) {
279 GLubyte mask
= 1 << (unpack
->SkipPixels
& 0x7);
281 for (i
= 0; i
< n
; i
++) {
282 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
293 GLubyte mask
= 128 >> (unpack
->SkipPixels
& 0x7);
295 for (i
= 0; i
< n
; i
++) {
296 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
308 case GL_UNSIGNED_BYTE
:
311 const GLubyte
*s
= (const GLubyte
*) src
;
312 for (i
= 0; i
< n
; i
++)
319 const GLbyte
*s
= (const GLbyte
*) src
;
320 for (i
= 0; i
< n
; i
++)
324 case GL_UNSIGNED_SHORT
:
327 const GLushort
*s
= (const GLushort
*) src
;
328 if (unpack
->SwapBytes
) {
329 for (i
= 0; i
< n
; i
++) {
330 GLushort value
= s
[i
];
336 for (i
= 0; i
< n
; i
++)
344 const GLshort
*s
= (const GLshort
*) src
;
345 if (unpack
->SwapBytes
) {
346 for (i
= 0; i
< n
; i
++) {
347 GLshort value
= s
[i
];
353 for (i
= 0; i
< n
; i
++)
358 case GL_UNSIGNED_INT
:
361 const GLuint
*s
= (const GLuint
*) src
;
362 if (unpack
->SwapBytes
) {
363 for (i
= 0; i
< n
; i
++) {
370 for (i
= 0; i
< n
; i
++)
378 const GLint
*s
= (const GLint
*) src
;
379 if (unpack
->SwapBytes
) {
380 for (i
= 0; i
< n
; i
++) {
387 for (i
= 0; i
< n
; i
++)
395 const GLfloat
*s
= (const GLfloat
*) src
;
396 if (unpack
->SwapBytes
) {
397 for (i
= 0; i
< n
; i
++) {
398 GLfloat value
= s
[i
];
400 indexes
[i
] = (GLuint
) value
;
404 for (i
= 0; i
< n
; i
++)
405 indexes
[i
] = (GLuint
) s
[i
];
409 case GL_HALF_FLOAT_ARB
:
410 case GL_HALF_FLOAT_OES
:
413 const GLhalfARB
*s
= (const GLhalfARB
*) src
;
414 if (unpack
->SwapBytes
) {
415 for (i
= 0; i
< n
; i
++) {
416 GLhalfARB value
= s
[i
];
418 indexes
[i
] = (GLuint
) _mesa_half_to_float(value
);
422 for (i
= 0; i
< n
; i
++)
423 indexes
[i
] = (GLuint
) _mesa_half_to_float(s
[i
]);
427 case GL_UNSIGNED_INT_24_8_EXT
:
430 const GLuint
*s
= (const GLuint
*) src
;
431 if (unpack
->SwapBytes
) {
432 for (i
= 0; i
< n
; i
++) {
435 indexes
[i
] = value
& 0xff; /* lower 8 bits */
439 for (i
= 0; i
< n
; i
++)
440 indexes
[i
] = s
[i
] & 0xff; /* lower 8 bits */
444 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
447 const GLuint
*s
= (const GLuint
*) src
;
448 if (unpack
->SwapBytes
) {
449 for (i
= 0; i
< n
; i
++) {
450 GLuint value
= s
[i
*2+1];
452 indexes
[i
] = value
& 0xff; /* lower 8 bits */
456 for (i
= 0; i
< n
; i
++)
457 indexes
[i
] = s
[i
*2+1] & 0xff; /* lower 8 bits */
463 unreachable("bad srcType in extract_uint_indexes");
469 * Unpack a row of stencil data from a client buffer according to
470 * the pixel unpacking parameters.
471 * This is (or will be) used by glDrawPixels
473 * Args: ctx - the context
474 * n - number of pixels
475 * dstType - destination data type
476 * dest - destination array
477 * srcType - source pixel type
478 * source - source data pointer
479 * srcPacking - pixel unpacking parameters
480 * transferOps - apply offset/bias/lookup ops?
483 _mesa_unpack_stencil_span( struct gl_context
*ctx
, GLuint n
,
484 GLenum dstType
, GLvoid
*dest
,
485 GLenum srcType
, const GLvoid
*source
,
486 const struct gl_pixelstore_attrib
*srcPacking
,
487 GLbitfield transferOps
)
489 assert(srcType
== GL_BITMAP
||
490 srcType
== GL_UNSIGNED_BYTE
||
491 srcType
== GL_BYTE
||
492 srcType
== GL_UNSIGNED_SHORT
||
493 srcType
== GL_SHORT
||
494 srcType
== GL_UNSIGNED_INT
||
496 srcType
== GL_UNSIGNED_INT_24_8_EXT
||
497 srcType
== GL_HALF_FLOAT_ARB
||
498 srcType
== GL_HALF_FLOAT_OES
||
499 srcType
== GL_FLOAT
||
500 srcType
== GL_FLOAT_32_UNSIGNED_INT_24_8_REV
);
502 assert(dstType
== GL_UNSIGNED_BYTE
||
503 dstType
== GL_UNSIGNED_SHORT
||
504 dstType
== GL_UNSIGNED_INT
||
505 dstType
== GL_FLOAT_32_UNSIGNED_INT_24_8_REV
);
507 /* only shift and offset apply to stencil */
508 transferOps
&= IMAGE_SHIFT_OFFSET_BIT
;
511 * Try simple cases first
513 if (transferOps
== 0 &&
514 !ctx
->Pixel
.MapStencilFlag
&&
515 srcType
== GL_UNSIGNED_BYTE
&&
516 dstType
== GL_UNSIGNED_BYTE
) {
517 memcpy(dest
, source
, n
* sizeof(GLubyte
));
519 else if (transferOps
== 0 &&
520 !ctx
->Pixel
.MapStencilFlag
&&
521 srcType
== GL_UNSIGNED_INT
&&
522 dstType
== GL_UNSIGNED_INT
&&
523 !srcPacking
->SwapBytes
) {
524 memcpy(dest
, source
, n
* sizeof(GLuint
));
530 GLuint
*indexes
= malloc(n
* sizeof(GLuint
));
533 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "stencil unpacking");
537 extract_uint_indexes(n
, indexes
, GL_STENCIL_INDEX
, srcType
, source
,
540 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
541 /* shift and offset indexes */
542 _mesa_shift_and_offset_ci(ctx
, n
, indexes
);
545 if (ctx
->Pixel
.MapStencilFlag
) {
546 /* Apply stencil lookup table */
547 const GLuint mask
= ctx
->PixelMaps
.StoS
.Size
- 1;
549 for (i
= 0; i
< n
; i
++) {
550 indexes
[i
] = (GLuint
)ctx
->PixelMaps
.StoS
.Map
[ indexes
[i
] & mask
];
554 /* convert to dest type */
556 case GL_UNSIGNED_BYTE
:
558 GLubyte
*dst
= (GLubyte
*) dest
;
560 for (i
= 0; i
< n
; i
++) {
561 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
565 case GL_UNSIGNED_SHORT
:
567 GLuint
*dst
= (GLuint
*) dest
;
569 for (i
= 0; i
< n
; i
++) {
570 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
574 case GL_UNSIGNED_INT
:
575 memcpy(dest
, indexes
, n
* sizeof(GLuint
));
577 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
579 GLuint
*dst
= (GLuint
*) dest
;
581 for (i
= 0; i
< n
; i
++) {
582 dst
[i
*2+1] = indexes
[i
] & 0xff; /* lower 8 bits */
587 unreachable("bad dstType in _mesa_unpack_stencil_span");
596 _mesa_pack_stencil_span( struct gl_context
*ctx
, GLuint n
,
597 GLenum dstType
, GLvoid
*dest
, const GLubyte
*source
,
598 const struct gl_pixelstore_attrib
*dstPacking
)
600 GLubyte
*stencil
= malloc(n
* sizeof(GLubyte
));
603 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "stencil packing");
607 if (ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
||
608 ctx
->Pixel
.MapStencilFlag
) {
609 /* make a copy of input */
610 memcpy(stencil
, source
, n
* sizeof(GLubyte
));
611 _mesa_apply_stencil_transfer_ops(ctx
, n
, stencil
);
616 case GL_UNSIGNED_BYTE
:
617 memcpy(dest
, source
, n
);
621 GLbyte
*dst
= (GLbyte
*) dest
;
624 dst
[i
] = (GLbyte
) (source
[i
] & 0x7f);
628 case GL_UNSIGNED_SHORT
:
630 GLushort
*dst
= (GLushort
*) dest
;
633 dst
[i
] = (GLushort
) source
[i
];
635 if (dstPacking
->SwapBytes
) {
636 _mesa_swap2( (GLushort
*) dst
, n
);
642 GLshort
*dst
= (GLshort
*) dest
;
645 dst
[i
] = (GLshort
) source
[i
];
647 if (dstPacking
->SwapBytes
) {
648 _mesa_swap2( (GLushort
*) dst
, n
);
652 case GL_UNSIGNED_INT
:
654 GLuint
*dst
= (GLuint
*) dest
;
657 dst
[i
] = (GLuint
) source
[i
];
659 if (dstPacking
->SwapBytes
) {
660 _mesa_swap4( (GLuint
*) dst
, n
);
666 GLint
*dst
= (GLint
*) dest
;
669 dst
[i
] = (GLint
) source
[i
];
671 if (dstPacking
->SwapBytes
) {
672 _mesa_swap4( (GLuint
*) dst
, n
);
678 GLfloat
*dst
= (GLfloat
*) dest
;
681 dst
[i
] = (GLfloat
) source
[i
];
683 if (dstPacking
->SwapBytes
) {
684 _mesa_swap4( (GLuint
*) dst
, n
);
688 case GL_HALF_FLOAT_ARB
:
689 case GL_HALF_FLOAT_OES
:
691 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
694 dst
[i
] = _mesa_float_to_half( (float) source
[i
] );
696 if (dstPacking
->SwapBytes
) {
697 _mesa_swap2( (GLushort
*) dst
, n
);
702 if (dstPacking
->LsbFirst
) {
703 GLubyte
*dst
= (GLubyte
*) dest
;
706 for (i
= 0; i
< n
; i
++) {
709 *dst
|= ((source
[i
] != 0) << shift
);
718 GLubyte
*dst
= (GLubyte
*) dest
;
721 for (i
= 0; i
< n
; i
++) {
724 *dst
|= ((source
[i
] != 0) << shift
);
734 unreachable("bad type in _mesa_pack_index_span");
740 #define DEPTH_VALUES(GLTYPE, GLTYPE2FLOAT) \
743 const GLTYPE *src = (const GLTYPE *)source; \
744 for (i = 0; i < n; i++) { \
745 GLTYPE value = src[i]; \
746 if (srcPacking->SwapBytes) { \
747 if (sizeof(GLTYPE) == 2) { \
749 } else if (sizeof(GLTYPE) == 4) { \
753 depthValues[i] = GLTYPE2FLOAT(value); \
759 * Unpack a row of depth/z values from memory, returning GLushort, GLuint
761 * The glPixelTransfer (scale/bias) params will be applied.
763 * \param dstType one of GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, GL_FLOAT
764 * \param depthMax max value for returned GLushort or GLuint values
765 * (ignored for GLfloat).
768 _mesa_unpack_depth_span( struct gl_context
*ctx
, GLuint n
,
769 GLenum dstType
, GLvoid
*dest
, GLuint depthMax
,
770 GLenum srcType
, const GLvoid
*source
,
771 const struct gl_pixelstore_attrib
*srcPacking
)
773 GLfloat
*depthTemp
= NULL
, *depthValues
;
774 GLboolean needClamp
= GL_FALSE
;
776 /* Look for special cases first.
777 * Not only are these faster, they're less prone to numeric conversion
778 * problems. Otherwise, converting from an int type to a float then
779 * back to an int type can introduce errors that will show up as
780 * artifacts in things like depth peeling which uses glCopyTexImage.
782 if (ctx
->Pixel
.DepthScale
== 1.0F
&& ctx
->Pixel
.DepthBias
== 0.0F
) {
783 if (srcType
== GL_UNSIGNED_INT
&& dstType
== GL_UNSIGNED_SHORT
) {
784 const GLuint
*src
= (const GLuint
*) source
;
785 GLushort
*dst
= (GLushort
*) dest
;
787 for (i
= 0; i
< n
; i
++) {
788 dst
[i
] = src
[i
] >> 16;
792 if (srcType
== GL_UNSIGNED_SHORT
793 && dstType
== GL_UNSIGNED_INT
794 && depthMax
== 0xffffffff) {
795 const GLushort
*src
= (const GLushort
*) source
;
796 GLuint
*dst
= (GLuint
*) dest
;
798 for (i
= 0; i
< n
; i
++) {
799 dst
[i
] = src
[i
] | (src
[i
] << 16);
803 if (srcType
== GL_UNSIGNED_INT_24_8
804 && dstType
== GL_UNSIGNED_INT
805 && depthMax
== 0xffffff) {
806 const GLuint
*src
= (const GLuint
*) source
;
807 GLuint
*dst
= (GLuint
*) dest
;
809 for (i
= 0; i
< n
; i
++) {
810 dst
[i
] = src
[i
] >> 8;
814 /* XXX may want to add additional cases here someday */
817 /* general case path follows */
819 if (dstType
== GL_FLOAT
) {
820 depthValues
= (GLfloat
*) dest
;
823 depthTemp
= malloc(n
* sizeof(GLfloat
));
825 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "pixel unpacking");
829 depthValues
= depthTemp
;
832 /* Convert incoming values to GLfloat. Some conversions will require
837 DEPTH_VALUES(GLbyte
, BYTE_TO_FLOATZ
);
840 case GL_UNSIGNED_BYTE
:
841 DEPTH_VALUES(GLubyte
, UBYTE_TO_FLOAT
);
844 DEPTH_VALUES(GLshort
, SHORT_TO_FLOATZ
);
847 case GL_UNSIGNED_SHORT
:
848 DEPTH_VALUES(GLushort
, USHORT_TO_FLOAT
);
851 DEPTH_VALUES(GLint
, INT_TO_FLOAT
);
854 case GL_UNSIGNED_INT
:
855 DEPTH_VALUES(GLuint
, UINT_TO_FLOAT
);
857 case GL_UNSIGNED_INT_24_8_EXT
: /* GL_EXT_packed_depth_stencil */
858 if (dstType
== GL_UNSIGNED_INT_24_8_EXT
&&
859 depthMax
== 0xffffff &&
860 ctx
->Pixel
.DepthScale
== 1.0F
&&
861 ctx
->Pixel
.DepthBias
== 0.0F
) {
862 const GLuint
*src
= (const GLuint
*) source
;
863 GLuint
*zValues
= (GLuint
*) dest
;
865 for (i
= 0; i
< n
; i
++) {
866 GLuint value
= src
[i
];
867 if (srcPacking
->SwapBytes
) {
870 zValues
[i
] = value
& 0xffffff00;
876 const GLuint
*src
= (const GLuint
*) source
;
877 const GLfloat scale
= 1.0f
/ 0xffffff;
879 for (i
= 0; i
< n
; i
++) {
880 GLuint value
= src
[i
];
881 if (srcPacking
->SwapBytes
) {
884 depthValues
[i
] = (value
>> 8) * scale
;
888 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
891 const GLfloat
*src
= (const GLfloat
*)source
;
892 for (i
= 0; i
< n
; i
++) {
893 GLfloat value
= src
[i
* 2];
894 if (srcPacking
->SwapBytes
) {
897 depthValues
[i
] = value
;
903 DEPTH_VALUES(GLfloat
, 1*);
906 case GL_HALF_FLOAT_ARB
:
907 case GL_HALF_FLOAT_OES
:
910 const GLhalfARB
*src
= (const GLhalfARB
*) source
;
911 for (i
= 0; i
< n
; i
++) {
912 GLhalfARB value
= src
[i
];
913 if (srcPacking
->SwapBytes
) {
916 depthValues
[i
] = _mesa_half_to_float(value
);
922 _mesa_problem(NULL
, "bad type in _mesa_unpack_depth_span()");
927 /* apply depth scale and bias */
929 const GLfloat scale
= ctx
->Pixel
.DepthScale
;
930 const GLfloat bias
= ctx
->Pixel
.DepthBias
;
931 if (scale
!= 1.0F
|| bias
!= 0.0F
) {
933 for (i
= 0; i
< n
; i
++) {
934 depthValues
[i
] = depthValues
[i
] * scale
+ bias
;
940 /* clamp to [0, 1] */
943 for (i
= 0; i
< n
; i
++) {
944 depthValues
[i
] = CLAMP(depthValues
[i
], 0.0F
, 1.0F
);
949 * Convert values to dstType
951 if (dstType
== GL_UNSIGNED_INT
) {
952 GLuint
*zValues
= (GLuint
*) dest
;
954 if (depthMax
<= 0xffffff) {
955 /* no overflow worries */
956 for (i
= 0; i
< n
; i
++) {
957 zValues
[i
] = (GLuint
) (depthValues
[i
] * (GLfloat
) depthMax
);
961 /* need to use double precision to prevent overflow problems */
962 for (i
= 0; i
< n
; i
++) {
963 GLdouble z
= depthValues
[i
] * (GLdouble
) depthMax
;
964 if (z
>= (GLdouble
) 0xffffffff)
965 zValues
[i
] = 0xffffffff;
967 zValues
[i
] = (GLuint
) z
;
971 else if (dstType
== GL_UNSIGNED_SHORT
) {
972 GLushort
*zValues
= (GLushort
*) dest
;
974 assert(depthMax
<= 0xffff);
975 for (i
= 0; i
< n
; i
++) {
976 zValues
[i
] = (GLushort
) (depthValues
[i
] * (GLfloat
) depthMax
);
979 else if (dstType
== GL_FLOAT
) {
980 /* Nothing to do. depthValues is pointing to dest. */
982 else if (dstType
== GL_FLOAT_32_UNSIGNED_INT_24_8_REV
) {
983 GLfloat
*zValues
= (GLfloat
*) dest
;
985 for (i
= 0; i
< n
; i
++) {
986 zValues
[i
*2] = depthValues
[i
];
998 * Pack an array of depth values. The values are floats in [0,1].
1001 _mesa_pack_depth_span( struct gl_context
*ctx
, GLuint n
, GLvoid
*dest
,
1002 GLenum dstType
, const GLfloat
*depthSpan
,
1003 const struct gl_pixelstore_attrib
*dstPacking
)
1005 GLfloat
*depthCopy
= malloc(n
* sizeof(GLfloat
));
1007 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "pixel packing");
1011 if (ctx
->Pixel
.DepthScale
!= 1.0F
|| ctx
->Pixel
.DepthBias
!= 0.0F
) {
1012 memcpy(depthCopy
, depthSpan
, n
* sizeof(GLfloat
));
1013 _mesa_scale_and_bias_depth(ctx
, n
, depthCopy
);
1014 depthSpan
= depthCopy
;
1018 case GL_UNSIGNED_BYTE
:
1020 GLubyte
*dst
= (GLubyte
*) dest
;
1022 for (i
= 0; i
< n
; i
++) {
1023 dst
[i
] = FLOAT_TO_UBYTE( depthSpan
[i
] );
1029 GLbyte
*dst
= (GLbyte
*) dest
;
1031 for (i
= 0; i
< n
; i
++) {
1032 dst
[i
] = FLOAT_TO_BYTE( depthSpan
[i
] );
1036 case GL_UNSIGNED_SHORT
:
1038 GLushort
*dst
= (GLushort
*) dest
;
1040 for (i
= 0; i
< n
; i
++) {
1041 CLAMPED_FLOAT_TO_USHORT(dst
[i
], depthSpan
[i
]);
1043 if (dstPacking
->SwapBytes
) {
1044 _mesa_swap2( (GLushort
*) dst
, n
);
1050 GLshort
*dst
= (GLshort
*) dest
;
1052 for (i
= 0; i
< n
; i
++) {
1053 dst
[i
] = FLOAT_TO_SHORT( depthSpan
[i
] );
1055 if (dstPacking
->SwapBytes
) {
1056 _mesa_swap2( (GLushort
*) dst
, n
);
1060 case GL_UNSIGNED_INT_24_8
:
1062 const GLdouble scale
= (GLdouble
) 0xffffff;
1063 GLuint
*dst
= (GLuint
*) dest
;
1065 for (i
= 0; i
< n
; i
++) {
1066 GLuint z
= (GLuint
) (depthSpan
[i
] * scale
);
1067 assert(z
<= 0xffffff);
1070 if (dstPacking
->SwapBytes
) {
1071 _mesa_swap4( (GLuint
*) dst
, n
);
1075 case GL_UNSIGNED_INT
:
1077 GLuint
*dst
= (GLuint
*) dest
;
1079 for (i
= 0; i
< n
; i
++) {
1080 dst
[i
] = FLOAT_TO_UINT( depthSpan
[i
] );
1082 if (dstPacking
->SwapBytes
) {
1083 _mesa_swap4( (GLuint
*) dst
, n
);
1089 GLint
*dst
= (GLint
*) dest
;
1091 for (i
= 0; i
< n
; i
++) {
1092 dst
[i
] = FLOAT_TO_INT( depthSpan
[i
] );
1094 if (dstPacking
->SwapBytes
) {
1095 _mesa_swap4( (GLuint
*) dst
, n
);
1101 GLfloat
*dst
= (GLfloat
*) dest
;
1103 for (i
= 0; i
< n
; i
++) {
1104 dst
[i
] = depthSpan
[i
];
1106 if (dstPacking
->SwapBytes
) {
1107 _mesa_swap4( (GLuint
*) dst
, n
);
1111 case GL_HALF_FLOAT_ARB
:
1112 case GL_HALF_FLOAT_OES
:
1114 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
1116 for (i
= 0; i
< n
; i
++) {
1117 dst
[i
] = _mesa_float_to_half(depthSpan
[i
]);
1119 if (dstPacking
->SwapBytes
) {
1120 _mesa_swap2( (GLushort
*) dst
, n
);
1125 unreachable("bad type in _mesa_pack_depth_span()");
1134 * Pack depth and stencil values as GL_DEPTH_STENCIL (GL_UNSIGNED_INT_24_8 etc)
1137 _mesa_pack_depth_stencil_span(struct gl_context
*ctx
,GLuint n
,
1138 GLenum dstType
, GLuint
*dest
,
1139 const GLfloat
*depthVals
,
1140 const GLubyte
*stencilVals
,
1141 const struct gl_pixelstore_attrib
*dstPacking
)
1143 GLfloat
*depthCopy
= malloc(n
* sizeof(GLfloat
));
1144 GLubyte
*stencilCopy
= malloc(n
* sizeof(GLubyte
));
1147 if (!depthCopy
|| !stencilCopy
) {
1148 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "pixel packing");
1154 if (ctx
->Pixel
.DepthScale
!= 1.0F
|| ctx
->Pixel
.DepthBias
!= 0.0F
) {
1155 memcpy(depthCopy
, depthVals
, n
* sizeof(GLfloat
));
1156 _mesa_scale_and_bias_depth(ctx
, n
, depthCopy
);
1157 depthVals
= depthCopy
;
1160 if (ctx
->Pixel
.IndexShift
||
1161 ctx
->Pixel
.IndexOffset
||
1162 ctx
->Pixel
.MapStencilFlag
) {
1163 memcpy(stencilCopy
, stencilVals
, n
* sizeof(GLubyte
));
1164 _mesa_apply_stencil_transfer_ops(ctx
, n
, stencilCopy
);
1165 stencilVals
= stencilCopy
;
1169 case GL_UNSIGNED_INT_24_8
:
1170 for (i
= 0; i
< n
; i
++) {
1171 GLuint z
= (GLuint
) (depthVals
[i
] * 0xffffff);
1172 dest
[i
] = (z
<< 8) | (stencilVals
[i
] & 0xff);
1175 case GL_FLOAT_32_UNSIGNED_INT_24_8_REV
:
1176 for (i
= 0; i
< n
; i
++) {
1177 ((GLfloat
*)dest
)[i
*2] = depthVals
[i
];
1178 dest
[i
*2+1] = stencilVals
[i
] & 0xff;
1183 if (dstPacking
->SwapBytes
) {
1184 _mesa_swap4(dest
, n
);
1194 * Unpack image data. Apply byte swapping, byte flipping (bitmap).
1195 * Return all image data in a contiguous block. This is used when we
1196 * compile glDrawPixels, glTexImage, etc into a display list. We
1197 * need a copy of the data in a standard format.
1200 _mesa_unpack_image( GLuint dimensions
,
1201 GLsizei width
, GLsizei height
, GLsizei depth
,
1202 GLenum format
, GLenum type
, const GLvoid
*pixels
,
1203 const struct gl_pixelstore_attrib
*unpack
)
1205 GLint bytesPerRow
, compsPerRow
;
1206 GLboolean flipBytes
, swap2
, swap4
;
1209 return NULL
; /* not necessarily an error */
1211 if (width
<= 0 || height
<= 0 || depth
<= 0)
1212 return NULL
; /* generate error later */
1214 if (type
== GL_BITMAP
) {
1215 bytesPerRow
= (width
+ 7) >> 3;
1216 flipBytes
= unpack
->LsbFirst
;
1217 swap2
= swap4
= GL_FALSE
;
1221 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
1222 GLint components
= _mesa_components_in_format(format
);
1225 if (_mesa_type_is_packed(type
))
1228 if (bytesPerPixel
<= 0 || components
<= 0)
1229 return NULL
; /* bad format or type. generate error later */
1230 bytesPerRow
= bytesPerPixel
* width
;
1231 bytesPerComp
= bytesPerPixel
/ components
;
1232 flipBytes
= GL_FALSE
;
1233 swap2
= (bytesPerComp
== 2) && unpack
->SwapBytes
;
1234 swap4
= (bytesPerComp
== 4) && unpack
->SwapBytes
;
1235 compsPerRow
= components
* width
;
1236 assert(compsPerRow
>= width
);
1241 = malloc(bytesPerRow
* height
* depth
);
1245 return NULL
; /* generate GL_OUT_OF_MEMORY later */
1248 for (img
= 0; img
< depth
; img
++) {
1249 for (row
= 0; row
< height
; row
++) {
1250 const GLvoid
*src
= _mesa_image_address(dimensions
, unpack
, pixels
,
1251 width
, height
, format
, type
, img
, row
, 0);
1253 if ((type
== GL_BITMAP
) && (unpack
->SkipPixels
& 0x7)) {
1255 flipBytes
= GL_FALSE
;
1256 if (unpack
->LsbFirst
) {
1257 GLubyte srcMask
= 1 << (unpack
->SkipPixels
& 0x7);
1258 GLubyte dstMask
= 128;
1259 const GLubyte
*s
= src
;
1262 for (i
= 0; i
< width
; i
++) {
1266 if (srcMask
== 128) {
1271 srcMask
= srcMask
<< 1;
1279 dstMask
= dstMask
>> 1;
1284 GLubyte srcMask
= 128 >> (unpack
->SkipPixels
& 0x7);
1285 GLubyte dstMask
= 128;
1286 const GLubyte
*s
= src
;
1289 for (i
= 0; i
< width
; i
++) {
1298 srcMask
= srcMask
>> 1;
1306 dstMask
= dstMask
>> 1;
1312 memcpy(dst
, src
, bytesPerRow
);
1315 /* byte flipping/swapping */
1317 flip_bytes((GLubyte
*) dst
, bytesPerRow
);
1320 _mesa_swap2((GLushort
*) dst
, compsPerRow
);
1323 _mesa_swap4((GLuint
*) dst
, compsPerRow
);
1333 _mesa_pack_luminance_from_rgba_float(GLuint n
, GLfloat rgba
[][4],
1334 GLvoid
*dstAddr
, GLenum dst_format
,
1335 GLbitfield transferOps
)
1338 GLfloat
*dst
= (GLfloat
*) dstAddr
;
1340 switch (dst_format
) {
1342 if (transferOps
& IMAGE_CLAMP_BIT
) {
1343 for (i
= 0; i
< n
; i
++) {
1344 GLfloat sum
= rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
1345 dst
[i
] = CLAMP(sum
, 0.0F
, 1.0F
);
1348 for (i
= 0; i
< n
; i
++) {
1349 dst
[i
] = rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
1353 case GL_LUMINANCE_ALPHA
:
1354 if (transferOps
& IMAGE_CLAMP_BIT
) {
1355 for (i
= 0; i
< n
; i
++) {
1356 GLfloat sum
= rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
1357 dst
[2*i
] = CLAMP(sum
, 0.0F
, 1.0F
);
1358 dst
[2*i
+1] = rgba
[i
][ACOMP
];
1361 for (i
= 0; i
< n
; i
++) {
1362 dst
[2*i
] = rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
1363 dst
[2*i
+1] = rgba
[i
][ACOMP
];
1368 assert(!"Unsupported format");
1373 clamp_sint64_to_sint32(int64_t src
)
1375 return CLAMP(src
, INT32_MIN
, INT32_MAX
);
1379 clamp_sint64_to_uint32(int64_t src
)
1381 return CLAMP(src
, 0, UINT32_MAX
);
1385 clamp_uint64_to_uint32(uint64_t src
)
1387 return MIN2(src
, UINT32_MAX
);
1391 clamp_uint64_to_sint32(uint64_t src
)
1393 return MIN2(src
, INT32_MAX
);
1397 convert_integer_luminance64(int64_t src64
, int bits
,
1398 bool dst_is_signed
, bool src_is_signed
)
1402 /* Clamp Luminance value from 64-bit to 32-bit. Consider if we need
1403 * any signed<->unsigned conversion too.
1405 if (src_is_signed
&& dst_is_signed
)
1406 src32
= clamp_sint64_to_sint32(src64
);
1407 else if (src_is_signed
&& !dst_is_signed
)
1408 src32
= clamp_sint64_to_uint32(src64
);
1409 else if (!src_is_signed
&& dst_is_signed
)
1410 src32
= clamp_uint64_to_sint32(src64
);
1412 src32
= clamp_uint64_to_uint32(src64
);
1414 /* If the dst type is < 32-bit, we need an extra clamp */
1419 return _mesa_signed_to_signed(src32
, bits
);
1421 return _mesa_unsigned_to_unsigned(src32
, bits
);
1426 convert_integer(int32_t src
, int bits
, bool dst_is_signed
, bool src_is_signed
)
1428 if (src_is_signed
&& dst_is_signed
)
1429 return _mesa_signed_to_signed(src
, bits
);
1430 else if (src_is_signed
&& !dst_is_signed
)
1431 return _mesa_signed_to_unsigned(src
, bits
);
1432 else if (!src_is_signed
&& dst_is_signed
)
1433 return _mesa_unsigned_to_signed(src
, bits
);
1435 return _mesa_unsigned_to_unsigned(src
, bits
);
1439 _mesa_pack_luminance_from_rgba_integer(GLuint n
,
1440 GLuint rgba
[][4], bool rgba_is_signed
,
1447 int32_t lum32
, alpha
;
1451 assert(dst_format
== GL_LUMINANCE_INTEGER_EXT
||
1452 dst_format
== GL_LUMINANCE_ALPHA_INTEGER_EXT
);
1454 /* We first compute luminance values as a 64-bit addition of the
1455 * 32-bit R,G,B components, then we clamp the result to the dst type size.
1457 * Notice that this operation involves casting the 32-bit R,G,B components
1458 * to 64-bit before the addition. Since rgba is defined as a GLuint array
1459 * we need to be careful when rgba packs signed data and make sure
1460 * that we cast to a 32-bit signed integer values before casting them to
1461 * 64-bit signed integers.
1463 dst_is_signed
= (dst_type
== GL_BYTE
|| dst_type
== GL_SHORT
||
1464 dst_type
== GL_INT
);
1466 dst_bits
= _mesa_sizeof_type(dst_type
) * 8;
1467 assert(dst_bits
> 0);
1469 switch (dst_format
) {
1470 case GL_LUMINANCE_INTEGER_EXT
:
1471 for (i
= 0; i
< n
; i
++) {
1472 if (!rgba_is_signed
) {
1473 lum64
= (uint64_t) rgba
[i
][RCOMP
] +
1474 (uint64_t) rgba
[i
][GCOMP
] +
1475 (uint64_t) rgba
[i
][BCOMP
];
1477 lum64
= (int64_t) ((int32_t) rgba
[i
][RCOMP
]) +
1478 (int64_t) ((int32_t) rgba
[i
][GCOMP
]) +
1479 (int64_t) ((int32_t) rgba
[i
][BCOMP
]);
1481 lum32
= convert_integer_luminance64(lum64
, dst_bits
,
1482 dst_is_signed
, rgba_is_signed
);
1485 case GL_UNSIGNED_BYTE
: {
1486 GLbyte
*dst
= (GLbyte
*) dstAddr
;
1491 case GL_UNSIGNED_SHORT
: {
1492 GLshort
*dst
= (GLshort
*) dstAddr
;
1497 case GL_UNSIGNED_INT
: {
1498 GLint
*dst
= (GLint
*) dstAddr
;
1505 case GL_LUMINANCE_ALPHA_INTEGER_EXT
:
1506 for (i
= 0; i
< n
; i
++) {
1507 if (!rgba_is_signed
) {
1508 lum64
= (uint64_t) rgba
[i
][RCOMP
] +
1509 (uint64_t) rgba
[i
][GCOMP
] +
1510 (uint64_t) rgba
[i
][BCOMP
];
1512 lum64
= (int64_t) ((int32_t) rgba
[i
][RCOMP
]) +
1513 (int64_t) ((int32_t) rgba
[i
][GCOMP
]) +
1514 (int64_t) ((int32_t) rgba
[i
][BCOMP
]);
1516 lum32
= convert_integer_luminance64(lum64
, dst_bits
,
1517 dst_is_signed
, rgba_is_signed
);
1518 alpha
= convert_integer(rgba
[i
][ACOMP
], dst_bits
,
1519 dst_is_signed
, rgba_is_signed
);
1522 case GL_UNSIGNED_BYTE
: {
1523 GLbyte
*dst
= (GLbyte
*) dstAddr
;
1529 case GL_UNSIGNED_SHORT
: {
1530 GLshort
*dst
= (GLshort
*) dstAddr
;
1536 case GL_UNSIGNED_INT
: {
1537 GLint
*dst
= (GLint
*) dstAddr
;
1549 _mesa_unpack_color_index_to_rgba_float(struct gl_context
*ctx
, GLuint dims
,
1550 const void *src
, GLenum srcFormat
, GLenum srcType
,
1551 int srcWidth
, int srcHeight
, int srcDepth
,
1552 const struct gl_pixelstore_attrib
*srcPacking
,
1553 GLbitfield transferOps
)
1557 GLfloat
*rgba
, *dstPtr
;
1559 count
= srcWidth
* srcHeight
;
1560 indexes
= malloc(count
* sizeof(GLuint
));
1562 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "pixel unpacking");
1566 rgba
= malloc(4 * count
* srcDepth
* sizeof(GLfloat
));
1569 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "pixel unpacking");
1573 /* Convert indexes to RGBA float */
1575 for (img
= 0; img
< srcDepth
; img
++) {
1576 const GLubyte
*srcPtr
=
1577 (const GLubyte
*) _mesa_image_address(dims
, srcPacking
, src
,
1578 srcWidth
, srcHeight
,
1582 extract_uint_indexes(count
, indexes
, srcFormat
, srcType
, srcPtr
, srcPacking
);
1584 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
)
1585 _mesa_shift_and_offset_ci(ctx
, count
, indexes
);
1587 _mesa_map_ci_to_rgba(ctx
, count
, indexes
, (float (*)[4])dstPtr
);
1589 /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
1590 * with color indexes.
1592 transferOps
&= ~(IMAGE_SCALE_BIAS_BIT
| IMAGE_MAP_COLOR_BIT
);
1593 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, count
, (float (*)[4])dstPtr
);
1595 dstPtr
+= srcHeight
* srcWidth
* 4;
1604 _mesa_unpack_color_index_to_rgba_ubyte(struct gl_context
*ctx
, GLuint dims
,
1605 const void *src
, GLenum srcFormat
, GLenum srcType
,
1606 int srcWidth
, int srcHeight
, int srcDepth
,
1607 const struct gl_pixelstore_attrib
*srcPacking
,
1608 GLbitfield transferOps
)
1614 transferOps
|= IMAGE_CLAMP_BIT
;
1615 rgba
= _mesa_unpack_color_index_to_rgba_float(ctx
, dims
,
1616 src
, srcFormat
, srcType
,
1617 srcWidth
, srcHeight
, srcDepth
,
1618 srcPacking
, transferOps
);
1620 count
= srcWidth
* srcHeight
* srcDepth
;
1621 dst
= malloc(count
* 4 * sizeof(GLubyte
));
1622 for (i
= 0; i
< count
; i
++) {
1623 CLAMPED_FLOAT_TO_UBYTE(dst
[i
* 4 + 0], rgba
[i
* 4 + 0]);
1624 CLAMPED_FLOAT_TO_UBYTE(dst
[i
* 4 + 1], rgba
[i
* 4 + 1]);
1625 CLAMPED_FLOAT_TO_UBYTE(dst
[i
* 4 + 2], rgba
[i
* 4 + 2]);
1626 CLAMPED_FLOAT_TO_UBYTE(dst
[i
* 4 + 3], rgba
[i
* 4 + 3]);