2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2008 Brian Paul All Rights Reserved.
6 * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice shall be included
16 * in all copies or substantial portions of the Software.
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
21 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
22 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
43 * Normally, BYTE_TO_FLOAT(0) returns 0.00392 That causes problems when
44 * we later convert the float to a packed integer value (such as for
45 * GL_RGB5_A1) because we'll wind up with a non-zero value.
47 * We redefine the macros here so zero is handled correctly.
50 #define BYTE_TO_FLOAT(B) ((B) == 0 ? 0.0F : ((2.0F * (B) + 1.0F) * (1.0F/255.0F)))
53 #define SHORT_TO_FLOAT(S) ((S) == 0 ? 0.0F : ((2.0F * (S) + 1.0F) * (1.0F/65535.0F)))
57 /** Compute ceiling of integer quotient of A divided by B. */
58 #define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
62 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
65 _mesa_type_is_packed(GLenum type
)
68 case GL_UNSIGNED_BYTE_3_3_2
:
69 case GL_UNSIGNED_BYTE_2_3_3_REV
:
70 case GL_UNSIGNED_SHORT_5_6_5
:
71 case GL_UNSIGNED_SHORT_5_6_5_REV
:
72 case GL_UNSIGNED_SHORT_4_4_4_4
:
73 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
74 case GL_UNSIGNED_SHORT_5_5_5_1
:
75 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
76 case GL_UNSIGNED_INT_8_8_8_8
:
77 case GL_UNSIGNED_INT_8_8_8_8_REV
:
78 case GL_UNSIGNED_INT_10_10_10_2
:
79 case GL_UNSIGNED_INT_2_10_10_10_REV
:
80 case GL_UNSIGNED_SHORT_8_8_MESA
:
81 case GL_UNSIGNED_SHORT_8_8_REV_MESA
:
82 case GL_UNSIGNED_INT_24_8_EXT
:
90 * Flip the 8 bits in each byte of the given array.
93 * \param n number of bytes.
95 * \todo try this trick to flip bytes someday:
97 * v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555);
98 * v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333);
99 * v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f);
103 flip_bytes( GLubyte
*p
, GLuint n
)
106 for (i
= 0; i
< n
; i
++) {
107 b
= (GLuint
) p
[i
]; /* words are often faster than bytes */
108 a
= ((b
& 0x01) << 7) |
122 * Flip the order of the 2 bytes in each word in the given array.
125 * \param n number of words.
128 _mesa_swap2( GLushort
*p
, GLuint n
)
131 for (i
= 0; i
< n
; i
++) {
132 p
[i
] = (p
[i
] >> 8) | ((p
[i
] << 8) & 0xff00);
139 * Flip the order of the 4 bytes in each word in the given array.
142 _mesa_swap4( GLuint
*p
, GLuint n
)
145 for (i
= 0; i
< n
; i
++) {
148 | ((b
>> 8) & 0xff00)
149 | ((b
<< 8) & 0xff0000)
150 | ((b
<< 24) & 0xff000000);
157 * Get the size of a GL data type.
159 * \param type GL data type.
161 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
162 * if an invalid type enum.
165 _mesa_sizeof_type( GLenum type
)
170 case GL_UNSIGNED_BYTE
:
171 return sizeof(GLubyte
);
173 return sizeof(GLbyte
);
174 case GL_UNSIGNED_SHORT
:
175 return sizeof(GLushort
);
177 return sizeof(GLshort
);
178 case GL_UNSIGNED_INT
:
179 return sizeof(GLuint
);
181 return sizeof(GLint
);
183 return sizeof(GLfloat
);
185 return sizeof(GLdouble
);
186 case GL_HALF_FLOAT_ARB
:
187 return sizeof(GLhalfARB
);
195 * Same as _mesa_sizeof_type() but also accepting the packed pixel
199 _mesa_sizeof_packed_type( GLenum type
)
204 case GL_UNSIGNED_BYTE
:
205 return sizeof(GLubyte
);
207 return sizeof(GLbyte
);
208 case GL_UNSIGNED_SHORT
:
209 return sizeof(GLushort
);
211 return sizeof(GLshort
);
212 case GL_UNSIGNED_INT
:
213 return sizeof(GLuint
);
215 return sizeof(GLint
);
216 case GL_HALF_FLOAT_ARB
:
217 return sizeof(GLhalfARB
);
219 return sizeof(GLfloat
);
220 case GL_UNSIGNED_BYTE_3_3_2
:
221 return sizeof(GLubyte
);
222 case GL_UNSIGNED_BYTE_2_3_3_REV
:
223 return sizeof(GLubyte
);
224 case GL_UNSIGNED_SHORT_5_6_5
:
225 return sizeof(GLushort
);
226 case GL_UNSIGNED_SHORT_5_6_5_REV
:
227 return sizeof(GLushort
);
228 case GL_UNSIGNED_SHORT_4_4_4_4
:
229 return sizeof(GLushort
);
230 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
231 return sizeof(GLushort
);
232 case GL_UNSIGNED_SHORT_5_5_5_1
:
233 return sizeof(GLushort
);
234 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
235 return sizeof(GLushort
);
236 case GL_UNSIGNED_INT_8_8_8_8
:
237 return sizeof(GLuint
);
238 case GL_UNSIGNED_INT_8_8_8_8_REV
:
239 return sizeof(GLuint
);
240 case GL_UNSIGNED_INT_10_10_10_2
:
241 return sizeof(GLuint
);
242 case GL_UNSIGNED_INT_2_10_10_10_REV
:
243 return sizeof(GLuint
);
244 case GL_UNSIGNED_SHORT_8_8_MESA
:
245 case GL_UNSIGNED_SHORT_8_8_REV_MESA
:
246 return sizeof(GLushort
);
247 case GL_UNSIGNED_INT_24_8_EXT
:
248 return sizeof(GLuint
);
256 * Get the number of components in a pixel format.
258 * \param format pixel format.
260 * \return the number of components in the given format, or -1 if a bad format.
263 _mesa_components_in_format( GLenum format
)
267 case GL_COLOR_INDEX1_EXT
:
268 case GL_COLOR_INDEX2_EXT
:
269 case GL_COLOR_INDEX4_EXT
:
270 case GL_COLOR_INDEX8_EXT
:
271 case GL_COLOR_INDEX12_EXT
:
272 case GL_COLOR_INDEX16_EXT
:
273 case GL_STENCIL_INDEX
:
274 case GL_DEPTH_COMPONENT
:
276 case GL_RED_INTEGER_EXT
:
278 case GL_GREEN_INTEGER_EXT
:
280 case GL_BLUE_INTEGER_EXT
:
282 case GL_ALPHA_INTEGER_EXT
:
284 case GL_LUMINANCE_INTEGER_EXT
:
287 case GL_LUMINANCE_ALPHA
:
288 case GL_LUMINANCE_ALPHA_INTEGER_EXT
:
292 case GL_RGB_INTEGER_EXT
:
295 case GL_RGBA_INTEGER_EXT
:
305 case GL_DEPTH_STENCIL_EXT
:
317 * Get the bytes per pixel of pixel format type pair.
319 * \param format pixel format.
320 * \param type pixel type.
322 * \return bytes per pixel, or -1 if a bad format or type was given.
325 _mesa_bytes_per_pixel( GLenum format
, GLenum type
)
327 GLint comps
= _mesa_components_in_format( format
);
333 return 0; /* special case */
335 case GL_UNSIGNED_BYTE
:
336 return comps
* sizeof(GLubyte
);
338 case GL_UNSIGNED_SHORT
:
339 return comps
* sizeof(GLshort
);
341 case GL_UNSIGNED_INT
:
342 return comps
* sizeof(GLint
);
344 return comps
* sizeof(GLfloat
);
345 case GL_HALF_FLOAT_ARB
:
346 return comps
* sizeof(GLhalfARB
);
347 case GL_UNSIGNED_BYTE_3_3_2
:
348 case GL_UNSIGNED_BYTE_2_3_3_REV
:
349 if (format
== GL_RGB
|| format
== GL_BGR
)
350 return sizeof(GLubyte
);
352 return -1; /* error */
353 case GL_UNSIGNED_SHORT_5_6_5
:
354 case GL_UNSIGNED_SHORT_5_6_5_REV
:
355 if (format
== GL_RGB
|| format
== GL_BGR
)
356 return sizeof(GLushort
);
358 return -1; /* error */
359 case GL_UNSIGNED_SHORT_4_4_4_4
:
360 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
361 case GL_UNSIGNED_SHORT_5_5_5_1
:
362 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
363 if (format
== GL_RGBA
|| format
== GL_BGRA
|| format
== GL_ABGR_EXT
)
364 return sizeof(GLushort
);
367 case GL_UNSIGNED_INT_8_8_8_8
:
368 case GL_UNSIGNED_INT_8_8_8_8_REV
:
369 case GL_UNSIGNED_INT_10_10_10_2
:
370 case GL_UNSIGNED_INT_2_10_10_10_REV
:
371 if (format
== GL_RGBA
|| format
== GL_BGRA
|| format
== GL_ABGR_EXT
)
372 return sizeof(GLuint
);
375 case GL_UNSIGNED_SHORT_8_8_MESA
:
376 case GL_UNSIGNED_SHORT_8_8_REV_MESA
:
377 if (format
== GL_YCBCR_MESA
)
378 return sizeof(GLushort
);
381 case GL_UNSIGNED_INT_24_8_EXT
:
382 if (format
== GL_DEPTH_STENCIL_EXT
)
383 return sizeof(GLuint
);
393 * Test for a legal pixel format and type.
395 * \param format pixel format.
396 * \param type pixel type.
398 * \return GL_TRUE if the given pixel format and type are legal, or GL_FALSE
402 _mesa_is_legal_format_and_type( struct gl_context
*ctx
, GLenum format
, GLenum type
)
406 case GL_STENCIL_INDEX
:
410 case GL_UNSIGNED_BYTE
:
412 case GL_UNSIGNED_SHORT
:
414 case GL_UNSIGNED_INT
:
417 case GL_HALF_FLOAT_ARB
:
418 return ctx
->Extensions
.ARB_half_float_pixel
;
426 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
430 case GL_LUMINANCE_ALPHA
:
431 case GL_DEPTH_COMPONENT
:
434 case GL_UNSIGNED_BYTE
:
436 case GL_UNSIGNED_SHORT
:
438 case GL_UNSIGNED_INT
:
441 case GL_HALF_FLOAT_ARB
:
442 return ctx
->Extensions
.ARB_half_float_pixel
;
447 if (!ctx
->Extensions
.ARB_texture_rg
)
452 case GL_UNSIGNED_BYTE
:
454 case GL_UNSIGNED_SHORT
:
456 case GL_UNSIGNED_INT
:
459 case GL_HALF_FLOAT_ARB
:
460 return ctx
->Extensions
.ARB_half_float_pixel
;
467 case GL_UNSIGNED_BYTE
:
469 case GL_UNSIGNED_SHORT
:
471 case GL_UNSIGNED_INT
:
473 case GL_UNSIGNED_BYTE_3_3_2
:
474 case GL_UNSIGNED_BYTE_2_3_3_REV
:
475 case GL_UNSIGNED_SHORT_5_6_5
:
476 case GL_UNSIGNED_SHORT_5_6_5_REV
:
478 case GL_HALF_FLOAT_ARB
:
479 return ctx
->Extensions
.ARB_half_float_pixel
;
485 /* NOTE: no packed types are supported with BGR. That's
486 * intentional, according to the GL spec.
489 case GL_UNSIGNED_BYTE
:
491 case GL_UNSIGNED_SHORT
:
493 case GL_UNSIGNED_INT
:
496 case GL_HALF_FLOAT_ARB
:
497 return ctx
->Extensions
.ARB_half_float_pixel
;
506 case GL_UNSIGNED_BYTE
:
508 case GL_UNSIGNED_SHORT
:
510 case GL_UNSIGNED_INT
:
512 case GL_UNSIGNED_SHORT_4_4_4_4
:
513 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
514 case GL_UNSIGNED_SHORT_5_5_5_1
:
515 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
516 case GL_UNSIGNED_INT_8_8_8_8
:
517 case GL_UNSIGNED_INT_8_8_8_8_REV
:
518 case GL_UNSIGNED_INT_10_10_10_2
:
519 case GL_UNSIGNED_INT_2_10_10_10_REV
:
521 case GL_HALF_FLOAT_ARB
:
522 return ctx
->Extensions
.ARB_half_float_pixel
;
527 if (type
== GL_UNSIGNED_SHORT_8_8_MESA
||
528 type
== GL_UNSIGNED_SHORT_8_8_REV_MESA
)
532 case GL_DEPTH_STENCIL_EXT
:
533 if (ctx
->Extensions
.EXT_packed_depth_stencil
534 && type
== GL_UNSIGNED_INT_24_8_EXT
)
542 case GL_UNSIGNED_BYTE
:
544 case GL_UNSIGNED_SHORT
:
546 case GL_UNSIGNED_INT
:
552 case GL_RED_INTEGER_EXT
:
553 case GL_GREEN_INTEGER_EXT
:
554 case GL_BLUE_INTEGER_EXT
:
555 case GL_ALPHA_INTEGER_EXT
:
556 case GL_RGB_INTEGER_EXT
:
557 case GL_RGBA_INTEGER_EXT
:
558 case GL_BGR_INTEGER_EXT
:
559 case GL_BGRA_INTEGER_EXT
:
560 case GL_LUMINANCE_INTEGER_EXT
:
561 case GL_LUMINANCE_ALPHA_INTEGER_EXT
:
564 case GL_UNSIGNED_BYTE
:
566 case GL_UNSIGNED_SHORT
:
568 case GL_UNSIGNED_INT
:
569 return ctx
->Extensions
.EXT_texture_integer
;
582 * Test if the given image format is a color/RGBA format (i.e., not color
583 * index, depth, stencil, etc).
584 * \param format the image format value (may by an internal texture format)
585 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
588 _mesa_is_color_format(GLenum format
)
606 case GL_LUMINANCE_ALPHA
:
607 case GL_LUMINANCE4_ALPHA4
:
608 case GL_LUMINANCE6_ALPHA2
:
609 case GL_LUMINANCE8_ALPHA8
:
610 case GL_LUMINANCE12_ALPHA4
:
611 case GL_LUMINANCE12_ALPHA12
:
612 case GL_LUMINANCE16_ALPHA16
:
644 /* float texture formats */
645 case GL_ALPHA16F_ARB
:
646 case GL_ALPHA32F_ARB
:
647 case GL_LUMINANCE16F_ARB
:
648 case GL_LUMINANCE32F_ARB
:
649 case GL_LUMINANCE_ALPHA16F_ARB
:
650 case GL_LUMINANCE_ALPHA32F_ARB
:
651 case GL_INTENSITY16F_ARB
:
652 case GL_INTENSITY32F_ARB
:
661 /* compressed formats */
662 case GL_COMPRESSED_ALPHA
:
663 case GL_COMPRESSED_LUMINANCE
:
664 case GL_COMPRESSED_LUMINANCE_ALPHA
:
665 case GL_COMPRESSED_INTENSITY
:
666 case GL_COMPRESSED_RED
:
667 case GL_COMPRESSED_RG
:
668 case GL_COMPRESSED_RGB
:
669 case GL_COMPRESSED_RGBA
:
674 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
675 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
676 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
677 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
678 case GL_COMPRESSED_RGB_FXT1_3DFX
:
679 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
680 #if FEATURE_EXT_texture_sRGB
683 case GL_SRGB_ALPHA_EXT
:
684 case GL_SRGB8_ALPHA8_EXT
:
685 case GL_SLUMINANCE_ALPHA_EXT
:
686 case GL_SLUMINANCE8_ALPHA8_EXT
:
687 case GL_SLUMINANCE_EXT
:
688 case GL_SLUMINANCE8_EXT
:
689 case GL_COMPRESSED_SRGB_EXT
:
690 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
691 case GL_COMPRESSED_SRGB_ALPHA_EXT
:
692 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
693 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
694 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
695 case GL_COMPRESSED_SLUMINANCE_EXT
:
696 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT
:
697 #endif /* FEATURE_EXT_texture_sRGB */
698 case GL_COMPRESSED_RED_RGTC1
:
699 case GL_COMPRESSED_SIGNED_RED_RGTC1
:
700 case GL_COMPRESSED_RG_RGTC2
:
701 case GL_COMPRESSED_SIGNED_RG_RGTC2
:
703 /* signed texture formats */
707 case GL_YCBCR_MESA
: /* not considered to be RGB */
716 * Test if the given image format is a color index format.
719 _mesa_is_index_format(GLenum format
)
723 case GL_COLOR_INDEX1_EXT
:
724 case GL_COLOR_INDEX2_EXT
:
725 case GL_COLOR_INDEX4_EXT
:
726 case GL_COLOR_INDEX8_EXT
:
727 case GL_COLOR_INDEX12_EXT
:
728 case GL_COLOR_INDEX16_EXT
:
737 * Test if the given image format is a depth component format.
740 _mesa_is_depth_format(GLenum format
)
743 case GL_DEPTH_COMPONENT
:
744 case GL_DEPTH_COMPONENT16
:
745 case GL_DEPTH_COMPONENT24
:
746 case GL_DEPTH_COMPONENT32
:
755 * Test if the given image format is a stencil format.
758 _mesa_is_stencil_format(GLenum format
)
761 case GL_STENCIL_INDEX
:
762 case GL_DEPTH_STENCIL
:
771 * Test if the given image format is a YCbCr format.
774 _mesa_is_ycbcr_format(GLenum format
)
786 * Test if the given image format is a depth+stencil format.
789 _mesa_is_depthstencil_format(GLenum format
)
792 case GL_DEPTH24_STENCIL8_EXT
:
793 case GL_DEPTH_STENCIL_EXT
:
802 * Test if the given image format is a depth or stencil format.
805 _mesa_is_depth_or_stencil_format(GLenum format
)
808 case GL_DEPTH_COMPONENT
:
809 case GL_DEPTH_COMPONENT16
:
810 case GL_DEPTH_COMPONENT24
:
811 case GL_DEPTH_COMPONENT32
:
812 case GL_STENCIL_INDEX
:
813 case GL_STENCIL_INDEX1_EXT
:
814 case GL_STENCIL_INDEX4_EXT
:
815 case GL_STENCIL_INDEX8_EXT
:
816 case GL_STENCIL_INDEX16_EXT
:
817 case GL_DEPTH_STENCIL_EXT
:
818 case GL_DEPTH24_STENCIL8_EXT
:
827 * Test if the given image format is a dudv format.
830 _mesa_is_dudv_format(GLenum format
)
843 * Test if the given format is an integer (non-normalized) format.
846 _mesa_is_integer_format(GLenum format
)
849 case GL_RED_INTEGER_EXT
:
850 case GL_GREEN_INTEGER_EXT
:
851 case GL_BLUE_INTEGER_EXT
:
852 case GL_ALPHA_INTEGER_EXT
:
853 case GL_RGB_INTEGER_EXT
:
854 case GL_RGBA_INTEGER_EXT
:
855 case GL_BGR_INTEGER_EXT
:
856 case GL_BGRA_INTEGER_EXT
:
857 case GL_LUMINANCE_INTEGER_EXT
:
858 case GL_LUMINANCE_ALPHA_INTEGER_EXT
:
867 * Test if an image format is a supported compressed format.
868 * \param format the internal format token provided by the user.
869 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
872 _mesa_is_compressed_format(struct gl_context
*ctx
, GLenum format
)
875 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
876 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
877 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
878 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
879 return ctx
->Extensions
.EXT_texture_compression_s3tc
;
884 return ctx
->Extensions
.S3_s3tc
;
885 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
886 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
887 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
888 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
889 return ctx
->Extensions
.EXT_texture_sRGB
890 && ctx
->Extensions
.EXT_texture_compression_s3tc
;
891 case GL_COMPRESSED_RGB_FXT1_3DFX
:
892 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
893 return ctx
->Extensions
.TDFX_texture_compression_FXT1
;
894 case GL_COMPRESSED_RED_RGTC1
:
895 case GL_COMPRESSED_SIGNED_RED_RGTC1
:
896 case GL_COMPRESSED_RG_RGTC2
:
897 case GL_COMPRESSED_SIGNED_RG_RGTC2
:
898 return ctx
->Extensions
.ARB_texture_compression_rgtc
;
906 * Return the address of a specific pixel in an image (1D, 2D or 3D).
908 * Pixel unpacking/packing parameters are observed according to \p packing.
910 * \param dimensions either 1, 2 or 3 to indicate dimensionality of image
911 * \param image starting address of image data
912 * \param width the image width
913 * \param height theimage height
914 * \param format the pixel format
915 * \param type the pixel data type
916 * \param packing the pixelstore attributes
917 * \param img which image in the volume (0 for 1D or 2D images)
918 * \param row row of pixel in the image (0 for 1D images)
919 * \param column column of pixel in the image
921 * \return address of pixel on success, or NULL on error.
923 * \sa gl_pixelstore_attrib.
926 _mesa_image_address( GLuint dimensions
,
927 const struct gl_pixelstore_attrib
*packing
,
929 GLsizei width
, GLsizei height
,
930 GLenum format
, GLenum type
,
931 GLint img
, GLint row
, GLint column
)
933 GLint alignment
; /* 1, 2 or 4 */
934 GLint pixels_per_row
;
935 GLint rows_per_image
;
938 GLint skipimages
; /* for 3-D volume images */
941 ASSERT(dimensions
>= 1 && dimensions
<= 3);
943 alignment
= packing
->Alignment
;
944 if (packing
->RowLength
> 0) {
945 pixels_per_row
= packing
->RowLength
;
948 pixels_per_row
= width
;
950 if (packing
->ImageHeight
> 0) {
951 rows_per_image
= packing
->ImageHeight
;
954 rows_per_image
= height
;
957 skippixels
= packing
->SkipPixels
;
958 /* Note: SKIP_ROWS _is_ used for 1D images */
959 skiprows
= packing
->SkipRows
;
960 /* Note: SKIP_IMAGES is only used for 3D images */
961 skipimages
= (dimensions
== 3) ? packing
->SkipImages
: 0;
963 if (type
== GL_BITMAP
) {
965 GLint comp_per_pixel
; /* components per pixel */
966 GLint bytes_per_comp
; /* bytes per component */
968 GLint bytes_per_image
;
970 /* Compute bytes per component */
971 bytes_per_comp
= _mesa_sizeof_packed_type( type
);
972 if (bytes_per_comp
< 0) {
976 /* Compute number of components per pixel */
977 comp_per_pixel
= _mesa_components_in_format( format
);
978 if (comp_per_pixel
< 0) {
982 bytes_per_row
= alignment
983 * CEILING( comp_per_pixel
*pixels_per_row
, 8*alignment
);
985 bytes_per_image
= bytes_per_row
* rows_per_image
;
987 pixel_addr
= (GLubyte
*) image
988 + (skipimages
+ img
) * bytes_per_image
989 + (skiprows
+ row
) * bytes_per_row
990 + (skippixels
+ column
) / 8;
993 /* Non-BITMAP data */
994 GLint bytes_per_pixel
, bytes_per_row
, remainder
, bytes_per_image
;
997 bytes_per_pixel
= _mesa_bytes_per_pixel( format
, type
);
999 /* The pixel type and format should have been error checked earlier */
1000 assert(bytes_per_pixel
> 0);
1002 bytes_per_row
= pixels_per_row
* bytes_per_pixel
;
1003 remainder
= bytes_per_row
% alignment
;
1005 bytes_per_row
+= (alignment
- remainder
);
1007 ASSERT(bytes_per_row
% alignment
== 0);
1009 bytes_per_image
= bytes_per_row
* rows_per_image
;
1011 if (packing
->Invert
) {
1012 /* set pixel_addr to the last row */
1013 topOfImage
= bytes_per_row
* (height
- 1);
1014 bytes_per_row
= -bytes_per_row
;
1020 /* compute final pixel address */
1021 pixel_addr
= (GLubyte
*) image
1022 + (skipimages
+ img
) * bytes_per_image
1024 + (skiprows
+ row
) * bytes_per_row
1025 + (skippixels
+ column
) * bytes_per_pixel
;
1028 return (GLvoid
*) pixel_addr
;
1033 _mesa_image_address1d( const struct gl_pixelstore_attrib
*packing
,
1034 const GLvoid
*image
,
1036 GLenum format
, GLenum type
,
1039 return _mesa_image_address(1, packing
, image
, width
, 1,
1040 format
, type
, 0, 0, column
);
1045 _mesa_image_address2d( const struct gl_pixelstore_attrib
*packing
,
1046 const GLvoid
*image
,
1047 GLsizei width
, GLsizei height
,
1048 GLenum format
, GLenum type
,
1049 GLint row
, GLint column
)
1051 return _mesa_image_address(2, packing
, image
, width
, height
,
1052 format
, type
, 0, row
, column
);
1057 _mesa_image_address3d( const struct gl_pixelstore_attrib
*packing
,
1058 const GLvoid
*image
,
1059 GLsizei width
, GLsizei height
,
1060 GLenum format
, GLenum type
,
1061 GLint img
, GLint row
, GLint column
)
1063 return _mesa_image_address(3, packing
, image
, width
, height
,
1064 format
, type
, img
, row
, column
);
1070 * Compute the stride (in bytes) between image rows.
1072 * \param packing the pixelstore attributes
1073 * \param width image width.
1074 * \param format pixel format.
1075 * \param type pixel data type.
1077 * \return the stride in bytes for the given parameters, or -1 if error
1080 _mesa_image_row_stride( const struct gl_pixelstore_attrib
*packing
,
1081 GLint width
, GLenum format
, GLenum type
)
1083 GLint bytesPerRow
, remainder
;
1087 if (type
== GL_BITMAP
) {
1088 if (packing
->RowLength
== 0) {
1089 bytesPerRow
= (width
+ 7) / 8;
1092 bytesPerRow
= (packing
->RowLength
+ 7) / 8;
1096 /* Non-BITMAP data */
1097 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
1098 if (bytesPerPixel
<= 0)
1099 return -1; /* error */
1100 if (packing
->RowLength
== 0) {
1101 bytesPerRow
= bytesPerPixel
* width
;
1104 bytesPerRow
= bytesPerPixel
* packing
->RowLength
;
1108 remainder
= bytesPerRow
% packing
->Alignment
;
1109 if (remainder
> 0) {
1110 bytesPerRow
+= (packing
->Alignment
- remainder
);
1113 if (packing
->Invert
) {
1114 /* negate the bytes per row (negative row stride) */
1115 bytesPerRow
= -bytesPerRow
;
1125 * Compute the stride between images in a 3D texture (in bytes) for the given
1126 * pixel packing parameters and image width, format and type.
1129 _mesa_image_image_stride( const struct gl_pixelstore_attrib
*packing
,
1130 GLint width
, GLint height
,
1131 GLenum format
, GLenum type
)
1133 GLint bytesPerRow
, bytesPerImage
, remainder
;
1137 if (type
== GL_BITMAP
) {
1138 if (packing
->RowLength
== 0) {
1139 bytesPerRow
= (width
+ 7) / 8;
1142 bytesPerRow
= (packing
->RowLength
+ 7) / 8;
1146 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
1148 if (bytesPerPixel
<= 0)
1149 return -1; /* error */
1150 if (packing
->RowLength
== 0) {
1151 bytesPerRow
= bytesPerPixel
* width
;
1154 bytesPerRow
= bytesPerPixel
* packing
->RowLength
;
1158 remainder
= bytesPerRow
% packing
->Alignment
;
1160 bytesPerRow
+= (packing
->Alignment
- remainder
);
1162 if (packing
->ImageHeight
== 0)
1163 bytesPerImage
= bytesPerRow
* height
;
1165 bytesPerImage
= bytesPerRow
* packing
->ImageHeight
;
1167 return bytesPerImage
;
1172 * Unpack a 32x32 pixel polygon stipple from user memory using the
1173 * current pixel unpack settings.
1176 _mesa_unpack_polygon_stipple( const GLubyte
*pattern
, GLuint dest
[32],
1177 const struct gl_pixelstore_attrib
*unpacking
)
1179 GLubyte
*ptrn
= (GLubyte
*) _mesa_unpack_bitmap(32, 32, pattern
, unpacking
);
1181 /* Convert pattern from GLubytes to GLuints and handle big/little
1182 * endian differences
1186 for (i
= 0; i
< 32; i
++) {
1187 dest
[i
] = (p
[0] << 24)
1199 * Pack polygon stipple into user memory given current pixel packing
1203 _mesa_pack_polygon_stipple( const GLuint pattern
[32], GLubyte
*dest
,
1204 const struct gl_pixelstore_attrib
*packing
)
1206 /* Convert pattern from GLuints to GLubytes to handle big/little
1207 * endian differences.
1211 for (i
= 0; i
< 32; i
++) {
1212 ptrn
[i
* 4 + 0] = (GLubyte
) ((pattern
[i
] >> 24) & 0xff);
1213 ptrn
[i
* 4 + 1] = (GLubyte
) ((pattern
[i
] >> 16) & 0xff);
1214 ptrn
[i
* 4 + 2] = (GLubyte
) ((pattern
[i
] >> 8 ) & 0xff);
1215 ptrn
[i
* 4 + 3] = (GLubyte
) ((pattern
[i
] ) & 0xff);
1218 _mesa_pack_bitmap(32, 32, ptrn
, dest
, packing
);
1223 * Unpack bitmap data. Resulting data will be in most-significant-bit-first
1224 * order with row alignment = 1 byte.
1227 _mesa_unpack_bitmap( GLint width
, GLint height
, const GLubyte
*pixels
,
1228 const struct gl_pixelstore_attrib
*packing
)
1230 GLint bytes
, row
, width_in_bytes
;
1231 GLubyte
*buffer
, *dst
;
1236 /* Alloc dest storage */
1237 bytes
= ((width
+ 7) / 8 * height
);
1238 buffer
= (GLubyte
*) malloc( bytes
);
1242 width_in_bytes
= CEILING( width
, 8 );
1244 for (row
= 0; row
< height
; row
++) {
1245 const GLubyte
*src
= (const GLubyte
*)
1246 _mesa_image_address2d(packing
, pixels
, width
, height
,
1247 GL_COLOR_INDEX
, GL_BITMAP
, row
, 0);
1253 if ((packing
->SkipPixels
& 7) == 0) {
1254 memcpy( dst
, src
, width_in_bytes
);
1255 if (packing
->LsbFirst
) {
1256 flip_bytes( dst
, width_in_bytes
);
1260 /* handling SkipPixels is a bit tricky (no pun intended!) */
1262 if (packing
->LsbFirst
) {
1263 GLubyte srcMask
= 1 << (packing
->SkipPixels
& 0x7);
1264 GLubyte dstMask
= 128;
1265 const GLubyte
*s
= src
;
1268 for (i
= 0; i
< width
; i
++) {
1272 if (srcMask
== 128) {
1277 srcMask
= srcMask
<< 1;
1285 dstMask
= dstMask
>> 1;
1290 GLubyte srcMask
= 128 >> (packing
->SkipPixels
& 0x7);
1291 GLubyte dstMask
= 128;
1292 const GLubyte
*s
= src
;
1295 for (i
= 0; i
< width
; i
++) {
1304 srcMask
= srcMask
>> 1;
1312 dstMask
= dstMask
>> 1;
1317 dst
+= width_in_bytes
;
1328 _mesa_pack_bitmap( GLint width
, GLint height
, const GLubyte
*source
,
1329 GLubyte
*dest
, const struct gl_pixelstore_attrib
*packing
)
1331 GLint row
, width_in_bytes
;
1337 width_in_bytes
= CEILING( width
, 8 );
1339 for (row
= 0; row
< height
; row
++) {
1340 GLubyte
*dst
= (GLubyte
*) _mesa_image_address2d(packing
, dest
,
1341 width
, height
, GL_COLOR_INDEX
, GL_BITMAP
, row
, 0);
1345 if ((packing
->SkipPixels
& 7) == 0) {
1346 memcpy( dst
, src
, width_in_bytes
);
1347 if (packing
->LsbFirst
) {
1348 flip_bytes( dst
, width_in_bytes
);
1352 /* handling SkipPixels is a bit tricky (no pun intended!) */
1354 if (packing
->LsbFirst
) {
1355 GLubyte srcMask
= 128;
1356 GLubyte dstMask
= 1 << (packing
->SkipPixels
& 0x7);
1357 const GLubyte
*s
= src
;
1360 for (i
= 0; i
< width
; i
++) {
1369 srcMask
= srcMask
>> 1;
1371 if (dstMask
== 128) {
1377 dstMask
= dstMask
<< 1;
1382 GLubyte srcMask
= 128;
1383 GLubyte dstMask
= 128 >> (packing
->SkipPixels
& 0x7);
1384 const GLubyte
*s
= src
;
1387 for (i
= 0; i
< width
; i
++) {
1396 srcMask
= srcMask
>> 1;
1404 dstMask
= dstMask
>> 1;
1409 src
+= width_in_bytes
;
1415 * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel.
1416 * This is typically used to convert a bitmap into a GLubyte/pixel texture.
1417 * "On" bits will set texels to \p onValue.
1418 * "Off" bits will not modify texels.
1419 * \param width src bitmap width in pixels
1420 * \param height src bitmap height in pixels
1421 * \param unpack bitmap unpacking state
1422 * \param bitmap the src bitmap data
1423 * \param destBuffer start of dest buffer
1424 * \param destStride row stride in dest buffer
1425 * \param onValue if bit is 1, set destBuffer pixel to this value
1428 _mesa_expand_bitmap(GLsizei width
, GLsizei height
,
1429 const struct gl_pixelstore_attrib
*unpack
,
1430 const GLubyte
*bitmap
,
1431 GLubyte
*destBuffer
, GLint destStride
,
1434 const GLubyte
*srcRow
= (const GLubyte
*)
1435 _mesa_image_address2d(unpack
, bitmap
, width
, height
,
1436 GL_COLOR_INDEX
, GL_BITMAP
, 0, 0);
1437 const GLint srcStride
= _mesa_image_row_stride(unpack
, width
,
1438 GL_COLOR_INDEX
, GL_BITMAP
);
1441 #define SET_PIXEL(COL, ROW) \
1442 destBuffer[(ROW) * destStride + (COL)] = onValue;
1444 for (row
= 0; row
< height
; row
++) {
1445 const GLubyte
*src
= srcRow
;
1447 if (unpack
->LsbFirst
) {
1449 GLubyte mask
= 1U << (unpack
->SkipPixels
& 0x7);
1450 for (col
= 0; col
< width
; col
++) {
1453 SET_PIXEL(col
, row
);
1465 /* get ready for next row */
1471 GLubyte mask
= 128U >> (unpack
->SkipPixels
& 0x7);
1472 for (col
= 0; col
< width
; col
++) {
1475 SET_PIXEL(col
, row
);
1487 /* get ready for next row */
1492 srcRow
+= srcStride
;
1499 /**********************************************************************/
1500 /***** Pixel processing functions ******/
1501 /**********************************************************************/
1504 * Apply scale and bias factors to an array of RGBA pixels.
1507 _mesa_scale_and_bias_rgba(GLuint n
, GLfloat rgba
[][4],
1508 GLfloat rScale
, GLfloat gScale
,
1509 GLfloat bScale
, GLfloat aScale
,
1510 GLfloat rBias
, GLfloat gBias
,
1511 GLfloat bBias
, GLfloat aBias
)
1513 if (rScale
!= 1.0 || rBias
!= 0.0) {
1515 for (i
= 0; i
< n
; i
++) {
1516 rgba
[i
][RCOMP
] = rgba
[i
][RCOMP
] * rScale
+ rBias
;
1519 if (gScale
!= 1.0 || gBias
!= 0.0) {
1521 for (i
= 0; i
< n
; i
++) {
1522 rgba
[i
][GCOMP
] = rgba
[i
][GCOMP
] * gScale
+ gBias
;
1525 if (bScale
!= 1.0 || bBias
!= 0.0) {
1527 for (i
= 0; i
< n
; i
++) {
1528 rgba
[i
][BCOMP
] = rgba
[i
][BCOMP
] * bScale
+ bBias
;
1531 if (aScale
!= 1.0 || aBias
!= 0.0) {
1533 for (i
= 0; i
< n
; i
++) {
1534 rgba
[i
][ACOMP
] = rgba
[i
][ACOMP
] * aScale
+ aBias
;
1541 * Apply pixel mapping to an array of floating point RGBA pixels.
1544 _mesa_map_rgba( const struct gl_context
*ctx
, GLuint n
, GLfloat rgba
[][4] )
1546 const GLfloat rscale
= (GLfloat
) (ctx
->PixelMaps
.RtoR
.Size
- 1);
1547 const GLfloat gscale
= (GLfloat
) (ctx
->PixelMaps
.GtoG
.Size
- 1);
1548 const GLfloat bscale
= (GLfloat
) (ctx
->PixelMaps
.BtoB
.Size
- 1);
1549 const GLfloat ascale
= (GLfloat
) (ctx
->PixelMaps
.AtoA
.Size
- 1);
1550 const GLfloat
*rMap
= ctx
->PixelMaps
.RtoR
.Map
;
1551 const GLfloat
*gMap
= ctx
->PixelMaps
.GtoG
.Map
;
1552 const GLfloat
*bMap
= ctx
->PixelMaps
.BtoB
.Map
;
1553 const GLfloat
*aMap
= ctx
->PixelMaps
.AtoA
.Map
;
1556 GLfloat r
= CLAMP(rgba
[i
][RCOMP
], 0.0F
, 1.0F
);
1557 GLfloat g
= CLAMP(rgba
[i
][GCOMP
], 0.0F
, 1.0F
);
1558 GLfloat b
= CLAMP(rgba
[i
][BCOMP
], 0.0F
, 1.0F
);
1559 GLfloat a
= CLAMP(rgba
[i
][ACOMP
], 0.0F
, 1.0F
);
1560 rgba
[i
][RCOMP
] = rMap
[IROUND(r
* rscale
)];
1561 rgba
[i
][GCOMP
] = gMap
[IROUND(g
* gscale
)];
1562 rgba
[i
][BCOMP
] = bMap
[IROUND(b
* bscale
)];
1563 rgba
[i
][ACOMP
] = aMap
[IROUND(a
* ascale
)];
1568 * Apply a color table lookup to an array of floating point RGBA colors.
1571 _mesa_lookup_rgba_float(const struct gl_color_table
*table
,
1572 GLuint n
, GLfloat rgba
[][4])
1574 const GLint max
= table
->Size
- 1;
1575 const GLfloat scale
= (GLfloat
) max
;
1576 const GLfloat
*lut
= table
->TableF
;
1579 if (!table
->TableF
|| table
->Size
== 0)
1582 switch (table
->_BaseFormat
) {
1584 /* replace RGBA with I */
1585 for (i
= 0; i
< n
; i
++) {
1586 GLint j
= IROUND(rgba
[i
][RCOMP
] * scale
);
1587 GLfloat c
= lut
[CLAMP(j
, 0, max
)];
1595 /* replace RGB with L */
1596 for (i
= 0; i
< n
; i
++) {
1597 GLint j
= IROUND(rgba
[i
][RCOMP
] * scale
);
1598 GLfloat c
= lut
[CLAMP(j
, 0, max
)];
1605 /* replace A with A */
1606 for (i
= 0; i
< n
; i
++) {
1607 GLint j
= IROUND(rgba
[i
][ACOMP
] * scale
);
1608 rgba
[i
][ACOMP
] = lut
[CLAMP(j
, 0, max
)];
1611 case GL_LUMINANCE_ALPHA
:
1612 /* replace RGBA with LLLA */
1613 for (i
= 0; i
< n
; i
++) {
1614 GLint jL
= IROUND(rgba
[i
][RCOMP
] * scale
);
1615 GLint jA
= IROUND(rgba
[i
][ACOMP
] * scale
);
1616 GLfloat luminance
, alpha
;
1617 jL
= CLAMP(jL
, 0, max
);
1618 jA
= CLAMP(jA
, 0, max
);
1619 luminance
= lut
[jL
* 2 + 0];
1620 alpha
= lut
[jA
* 2 + 1];
1623 rgba
[i
][BCOMP
] = luminance
;
1624 rgba
[i
][ACOMP
] = alpha
;;
1628 /* replace RGB with RGB */
1629 for (i
= 0; i
< n
; i
++) {
1630 GLint jR
= IROUND(rgba
[i
][RCOMP
] * scale
);
1631 jR
= CLAMP(jR
, 0, max
);
1632 rgba
[i
][RCOMP
] = lut
[jR
* 3 + 0];
1636 /* replace RG with RG */
1637 for (i
= 0; i
< n
; i
++) {
1638 GLint jR
= IROUND(rgba
[i
][RCOMP
] * scale
);
1639 GLint jG
= IROUND(rgba
[i
][GCOMP
] * scale
);
1640 jR
= CLAMP(jR
, 0, max
);
1641 jG
= CLAMP(jG
, 0, max
);
1642 rgba
[i
][RCOMP
] = lut
[jR
* 3 + 0];
1643 rgba
[i
][GCOMP
] = lut
[jG
* 3 + 1];
1647 /* replace RGB with RGB */
1648 for (i
= 0; i
< n
; i
++) {
1649 GLint jR
= IROUND(rgba
[i
][RCOMP
] * scale
);
1650 GLint jG
= IROUND(rgba
[i
][GCOMP
] * scale
);
1651 GLint jB
= IROUND(rgba
[i
][BCOMP
] * scale
);
1652 jR
= CLAMP(jR
, 0, max
);
1653 jG
= CLAMP(jG
, 0, max
);
1654 jB
= CLAMP(jB
, 0, max
);
1655 rgba
[i
][RCOMP
] = lut
[jR
* 3 + 0];
1656 rgba
[i
][GCOMP
] = lut
[jG
* 3 + 1];
1657 rgba
[i
][BCOMP
] = lut
[jB
* 3 + 2];
1661 /* replace RGBA with RGBA */
1662 for (i
= 0; i
< n
; i
++) {
1663 GLint jR
= IROUND(rgba
[i
][RCOMP
] * scale
);
1664 GLint jG
= IROUND(rgba
[i
][GCOMP
] * scale
);
1665 GLint jB
= IROUND(rgba
[i
][BCOMP
] * scale
);
1666 GLint jA
= IROUND(rgba
[i
][ACOMP
] * scale
);
1667 jR
= CLAMP(jR
, 0, max
);
1668 jG
= CLAMP(jG
, 0, max
);
1669 jB
= CLAMP(jB
, 0, max
);
1670 jA
= CLAMP(jA
, 0, max
);
1671 rgba
[i
][RCOMP
] = lut
[jR
* 4 + 0];
1672 rgba
[i
][GCOMP
] = lut
[jG
* 4 + 1];
1673 rgba
[i
][BCOMP
] = lut
[jB
* 4 + 2];
1674 rgba
[i
][ACOMP
] = lut
[jA
* 4 + 3];
1678 _mesa_problem(NULL
, "Bad format in _mesa_lookup_rgba_float");
1686 * Apply a color table lookup to an array of ubyte/RGBA colors.
1689 _mesa_lookup_rgba_ubyte(const struct gl_color_table
*table
,
1690 GLuint n
, GLubyte rgba
[][4])
1692 const GLubyte
*lut
= table
->TableUB
;
1693 const GLfloat scale
= (GLfloat
) (table
->Size
- 1) / (GLfloat
)255.0;
1696 if (!table
->TableUB
|| table
->Size
== 0)
1699 switch (table
->_BaseFormat
) {
1701 /* replace RGBA with I */
1702 if (table
->Size
== 256) {
1703 for (i
= 0; i
< n
; i
++) {
1704 const GLubyte c
= lut
[rgba
[i
][RCOMP
]];
1712 for (i
= 0; i
< n
; i
++) {
1713 GLint j
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1717 rgba
[i
][ACOMP
] = lut
[j
];
1722 /* replace RGB with L */
1723 if (table
->Size
== 256) {
1724 for (i
= 0; i
< n
; i
++) {
1725 const GLubyte c
= lut
[rgba
[i
][RCOMP
]];
1732 for (i
= 0; i
< n
; i
++) {
1733 GLint j
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1736 rgba
[i
][BCOMP
] = lut
[j
];
1741 /* replace A with A */
1742 if (table
->Size
== 256) {
1743 for (i
= 0; i
< n
; i
++) {
1744 rgba
[i
][ACOMP
] = lut
[rgba
[i
][ACOMP
]];
1748 for (i
= 0; i
< n
; i
++) {
1749 GLint j
= IROUND((GLfloat
) rgba
[i
][ACOMP
] * scale
);
1750 rgba
[i
][ACOMP
] = lut
[j
];
1754 case GL_LUMINANCE_ALPHA
:
1755 /* replace RGBA with LLLA */
1756 if (table
->Size
== 256) {
1757 for (i
= 0; i
< n
; i
++) {
1758 GLubyte l
= lut
[rgba
[i
][RCOMP
] * 2 + 0];
1759 GLubyte a
= lut
[rgba
[i
][ACOMP
] * 2 + 1];;
1767 for (i
= 0; i
< n
; i
++) {
1768 GLint jL
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1769 GLint jA
= IROUND((GLfloat
) rgba
[i
][ACOMP
] * scale
);
1770 GLubyte luminance
= lut
[jL
* 2 + 0];
1771 GLubyte alpha
= lut
[jA
* 2 + 1];
1774 rgba
[i
][BCOMP
] = luminance
;
1775 rgba
[i
][ACOMP
] = alpha
;
1780 if (table
->Size
== 256) {
1781 for (i
= 0; i
< n
; i
++) {
1782 rgba
[i
][RCOMP
] = lut
[rgba
[i
][RCOMP
] * 3 + 0];
1783 rgba
[i
][GCOMP
] = lut
[rgba
[i
][GCOMP
] * 3 + 1];
1784 rgba
[i
][BCOMP
] = lut
[rgba
[i
][BCOMP
] * 3 + 2];
1788 for (i
= 0; i
< n
; i
++) {
1789 GLint jR
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1790 GLint jG
= IROUND((GLfloat
) rgba
[i
][GCOMP
] * scale
);
1791 GLint jB
= IROUND((GLfloat
) rgba
[i
][BCOMP
] * scale
);
1792 rgba
[i
][RCOMP
] = lut
[jR
* 3 + 0];
1793 rgba
[i
][GCOMP
] = lut
[jG
* 3 + 1];
1794 rgba
[i
][BCOMP
] = lut
[jB
* 3 + 2];
1799 if (table
->Size
== 256) {
1800 for (i
= 0; i
< n
; i
++) {
1801 rgba
[i
][RCOMP
] = lut
[rgba
[i
][RCOMP
] * 4 + 0];
1802 rgba
[i
][GCOMP
] = lut
[rgba
[i
][GCOMP
] * 4 + 1];
1803 rgba
[i
][BCOMP
] = lut
[rgba
[i
][BCOMP
] * 4 + 2];
1804 rgba
[i
][ACOMP
] = lut
[rgba
[i
][ACOMP
] * 4 + 3];
1808 for (i
= 0; i
< n
; i
++) {
1809 GLint jR
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1810 GLint jG
= IROUND((GLfloat
) rgba
[i
][GCOMP
] * scale
);
1811 GLint jB
= IROUND((GLfloat
) rgba
[i
][BCOMP
] * scale
);
1812 GLint jA
= IROUND((GLfloat
) rgba
[i
][ACOMP
] * scale
);
1813 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][RCOMP
], lut
[jR
* 4 + 0]);
1814 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][GCOMP
], lut
[jG
* 4 + 1]);
1815 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][BCOMP
], lut
[jB
* 4 + 2]);
1816 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][ACOMP
], lut
[jA
* 4 + 3]);
1821 _mesa_problem(NULL
, "Bad format in _mesa_lookup_rgba_chan");
1829 * Map color indexes to float rgba values.
1832 _mesa_map_ci_to_rgba( const struct gl_context
*ctx
, GLuint n
,
1833 const GLuint index
[], GLfloat rgba
[][4] )
1835 GLuint rmask
= ctx
->PixelMaps
.ItoR
.Size
- 1;
1836 GLuint gmask
= ctx
->PixelMaps
.ItoG
.Size
- 1;
1837 GLuint bmask
= ctx
->PixelMaps
.ItoB
.Size
- 1;
1838 GLuint amask
= ctx
->PixelMaps
.ItoA
.Size
- 1;
1839 const GLfloat
*rMap
= ctx
->PixelMaps
.ItoR
.Map
;
1840 const GLfloat
*gMap
= ctx
->PixelMaps
.ItoG
.Map
;
1841 const GLfloat
*bMap
= ctx
->PixelMaps
.ItoB
.Map
;
1842 const GLfloat
*aMap
= ctx
->PixelMaps
.ItoA
.Map
;
1845 rgba
[i
][RCOMP
] = rMap
[index
[i
] & rmask
];
1846 rgba
[i
][GCOMP
] = gMap
[index
[i
] & gmask
];
1847 rgba
[i
][BCOMP
] = bMap
[index
[i
] & bmask
];
1848 rgba
[i
][ACOMP
] = aMap
[index
[i
] & amask
];
1854 * Map ubyte color indexes to ubyte/RGBA values.
1857 _mesa_map_ci8_to_rgba8(const struct gl_context
*ctx
, GLuint n
, const GLubyte index
[],
1860 GLuint rmask
= ctx
->PixelMaps
.ItoR
.Size
- 1;
1861 GLuint gmask
= ctx
->PixelMaps
.ItoG
.Size
- 1;
1862 GLuint bmask
= ctx
->PixelMaps
.ItoB
.Size
- 1;
1863 GLuint amask
= ctx
->PixelMaps
.ItoA
.Size
- 1;
1864 const GLubyte
*rMap
= ctx
->PixelMaps
.ItoR
.Map8
;
1865 const GLubyte
*gMap
= ctx
->PixelMaps
.ItoG
.Map8
;
1866 const GLubyte
*bMap
= ctx
->PixelMaps
.ItoB
.Map8
;
1867 const GLubyte
*aMap
= ctx
->PixelMaps
.ItoA
.Map8
;
1870 rgba
[i
][RCOMP
] = rMap
[index
[i
] & rmask
];
1871 rgba
[i
][GCOMP
] = gMap
[index
[i
] & gmask
];
1872 rgba
[i
][BCOMP
] = bMap
[index
[i
] & bmask
];
1873 rgba
[i
][ACOMP
] = aMap
[index
[i
] & amask
];
1879 _mesa_scale_and_bias_depth(const struct gl_context
*ctx
, GLuint n
,
1880 GLfloat depthValues
[])
1882 const GLfloat scale
= ctx
->Pixel
.DepthScale
;
1883 const GLfloat bias
= ctx
->Pixel
.DepthBias
;
1885 for (i
= 0; i
< n
; i
++) {
1886 GLfloat d
= depthValues
[i
] * scale
+ bias
;
1887 depthValues
[i
] = CLAMP(d
, 0.0F
, 1.0F
);
1893 _mesa_scale_and_bias_depth_uint(const struct gl_context
*ctx
, GLuint n
,
1894 GLuint depthValues
[])
1896 const GLdouble max
= (double) 0xffffffff;
1897 const GLdouble scale
= ctx
->Pixel
.DepthScale
;
1898 const GLdouble bias
= ctx
->Pixel
.DepthBias
* max
;
1900 for (i
= 0; i
< n
; i
++) {
1901 GLdouble d
= (GLdouble
) depthValues
[i
] * scale
+ bias
;
1902 d
= CLAMP(d
, 0.0, max
);
1903 depthValues
[i
] = (GLuint
) d
;
1908 * Apply various pixel transfer operations to an array of RGBA pixels
1909 * as indicated by the transferOps bitmask
1912 _mesa_apply_rgba_transfer_ops(struct gl_context
*ctx
, GLbitfield transferOps
,
1913 GLuint n
, GLfloat rgba
[][4])
1916 if (transferOps
& IMAGE_SCALE_BIAS_BIT
) {
1917 _mesa_scale_and_bias_rgba(n
, rgba
,
1918 ctx
->Pixel
.RedScale
, ctx
->Pixel
.GreenScale
,
1919 ctx
->Pixel
.BlueScale
, ctx
->Pixel
.AlphaScale
,
1920 ctx
->Pixel
.RedBias
, ctx
->Pixel
.GreenBias
,
1921 ctx
->Pixel
.BlueBias
, ctx
->Pixel
.AlphaBias
);
1923 /* color map lookup */
1924 if (transferOps
& IMAGE_MAP_COLOR_BIT
) {
1925 _mesa_map_rgba( ctx
, n
, rgba
);
1928 /* clamping to [0,1] */
1929 if (transferOps
& IMAGE_CLAMP_BIT
) {
1931 for (i
= 0; i
< n
; i
++) {
1932 rgba
[i
][RCOMP
] = CLAMP(rgba
[i
][RCOMP
], 0.0F
, 1.0F
);
1933 rgba
[i
][GCOMP
] = CLAMP(rgba
[i
][GCOMP
], 0.0F
, 1.0F
);
1934 rgba
[i
][BCOMP
] = CLAMP(rgba
[i
][BCOMP
], 0.0F
, 1.0F
);
1935 rgba
[i
][ACOMP
] = CLAMP(rgba
[i
][ACOMP
], 0.0F
, 1.0F
);
1942 * Apply color index shift and offset to an array of pixels.
1945 shift_and_offset_ci( const struct gl_context
*ctx
, GLuint n
, GLuint indexes
[] )
1947 GLint shift
= ctx
->Pixel
.IndexShift
;
1948 GLint offset
= ctx
->Pixel
.IndexOffset
;
1952 indexes
[i
] = (indexes
[i
] << shift
) + offset
;
1955 else if (shift
< 0) {
1958 indexes
[i
] = (indexes
[i
] >> shift
) + offset
;
1963 indexes
[i
] = indexes
[i
] + offset
;
1971 * Apply color index shift, offset and table lookup to an array
1975 _mesa_apply_ci_transfer_ops(const struct gl_context
*ctx
, GLbitfield transferOps
,
1976 GLuint n
, GLuint indexes
[])
1978 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
1979 shift_and_offset_ci(ctx
, n
, indexes
);
1981 if (transferOps
& IMAGE_MAP_COLOR_BIT
) {
1982 const GLuint mask
= ctx
->PixelMaps
.ItoI
.Size
- 1;
1984 for (i
= 0; i
< n
; i
++) {
1985 const GLuint j
= indexes
[i
] & mask
;
1986 indexes
[i
] = IROUND(ctx
->PixelMaps
.ItoI
.Map
[j
]);
1993 * Apply stencil index shift, offset and table lookup to an array
1994 * of stencil values.
1997 _mesa_apply_stencil_transfer_ops(const struct gl_context
*ctx
, GLuint n
,
1998 GLstencil stencil
[])
2000 if (ctx
->Pixel
.IndexShift
!= 0 || ctx
->Pixel
.IndexOffset
!= 0) {
2001 const GLint offset
= ctx
->Pixel
.IndexOffset
;
2002 GLint shift
= ctx
->Pixel
.IndexShift
;
2005 for (i
= 0; i
< n
; i
++) {
2006 stencil
[i
] = (stencil
[i
] << shift
) + offset
;
2009 else if (shift
< 0) {
2011 for (i
= 0; i
< n
; i
++) {
2012 stencil
[i
] = (stencil
[i
] >> shift
) + offset
;
2016 for (i
= 0; i
< n
; i
++) {
2017 stencil
[i
] = stencil
[i
] + offset
;
2021 if (ctx
->Pixel
.MapStencilFlag
) {
2022 GLuint mask
= ctx
->PixelMaps
.StoS
.Size
- 1;
2024 for (i
= 0; i
< n
; i
++) {
2025 stencil
[i
] = (GLstencil
)ctx
->PixelMaps
.StoS
.Map
[ stencil
[i
] & mask
];
2032 * Used to pack an array [][4] of RGBA float colors as specified
2033 * by the dstFormat, dstType and dstPacking. Used by glReadPixels.
2034 * Note: the rgba values will be modified by this function when any pixel
2035 * transfer ops are enabled.
2038 _mesa_pack_rgba_span_float(struct gl_context
*ctx
, GLuint n
, GLfloat rgba
[][4],
2039 GLenum dstFormat
, GLenum dstType
,
2041 const struct gl_pixelstore_attrib
*dstPacking
,
2042 GLbitfield transferOps
)
2044 GLfloat luminance
[MAX_WIDTH
];
2045 const GLint comps
= _mesa_components_in_format(dstFormat
);
2049 * This test should probably go away. Have the caller set/clear the
2050 * IMAGE_CLAMP_BIT as needed.
2052 if (dstType
!= GL_FLOAT
|| ctx
->Color
.ClampReadColor
== GL_TRUE
) {
2053 /* need to clamp to [0, 1] */
2054 transferOps
|= IMAGE_CLAMP_BIT
;
2058 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, n
, rgba
);
2061 if (dstFormat
== GL_LUMINANCE
|| dstFormat
== GL_LUMINANCE_ALPHA
) {
2062 /* compute luminance values */
2063 if (transferOps
& IMAGE_CLAMP_BIT
) {
2064 for (i
= 0; i
< n
; i
++) {
2065 GLfloat sum
= rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
2066 luminance
[i
] = CLAMP(sum
, 0.0F
, 1.0F
);
2070 for (i
= 0; i
< n
; i
++) {
2071 luminance
[i
] = rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
2077 * Pack/store the pixels. Ugh! Lots of cases!!!
2080 case GL_UNSIGNED_BYTE
:
2082 GLubyte
*dst
= (GLubyte
*) dstAddr
;
2083 switch (dstFormat
) {
2086 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2090 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2094 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2098 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2102 dst
[i
] = FLOAT_TO_UBYTE(luminance
[i
]);
2104 case GL_LUMINANCE_ALPHA
:
2106 dst
[i
*2+0] = FLOAT_TO_UBYTE(luminance
[i
]);
2107 dst
[i
*2+1] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2112 dst
[i
*3+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2113 dst
[i
*3+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2114 dst
[i
*3+2] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2119 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2120 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2121 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2122 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2127 dst
[i
*3+0] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2128 dst
[i
*3+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2129 dst
[i
*3+2] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2134 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2135 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2136 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2137 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2142 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2143 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2144 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2145 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2151 dst
[i
*2+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2152 dst
[i
*2+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2156 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2162 GLbyte
*dst
= (GLbyte
*) dstAddr
;
2163 switch (dstFormat
) {
2166 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2170 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2174 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2178 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2182 dst
[i
] = FLOAT_TO_BYTE(luminance
[i
]);
2184 case GL_LUMINANCE_ALPHA
:
2186 dst
[i
*2+0] = FLOAT_TO_BYTE(luminance
[i
]);
2187 dst
[i
*2+1] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2192 dst
[i
*3+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2193 dst
[i
*3+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2194 dst
[i
*3+2] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2199 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2200 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2201 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2202 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2207 dst
[i
*3+0] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2208 dst
[i
*3+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2209 dst
[i
*3+2] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2214 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2215 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2216 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2217 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2222 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2223 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2224 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2225 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2231 dst
[i
*2+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2232 dst
[i
*2+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2236 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2240 case GL_UNSIGNED_SHORT
:
2242 GLushort
*dst
= (GLushort
*) dstAddr
;
2243 switch (dstFormat
) {
2246 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][RCOMP
]);
2250 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][GCOMP
]);
2254 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][BCOMP
]);
2258 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][ACOMP
]);
2262 UNCLAMPED_FLOAT_TO_USHORT(dst
[i
], luminance
[i
]);
2264 case GL_LUMINANCE_ALPHA
:
2266 UNCLAMPED_FLOAT_TO_USHORT(dst
[i
*2+0], luminance
[i
]);
2267 CLAMPED_FLOAT_TO_USHORT(dst
[i
*2+1], rgba
[i
][ACOMP
]);
2272 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+0], rgba
[i
][RCOMP
]);
2273 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+1], rgba
[i
][GCOMP
]);
2274 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+2], rgba
[i
][BCOMP
]);
2279 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+0], rgba
[i
][RCOMP
]);
2280 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+1], rgba
[i
][GCOMP
]);
2281 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+2], rgba
[i
][BCOMP
]);
2282 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+3], rgba
[i
][ACOMP
]);
2287 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+0], rgba
[i
][BCOMP
]);
2288 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+1], rgba
[i
][GCOMP
]);
2289 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+2], rgba
[i
][RCOMP
]);
2294 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+0], rgba
[i
][BCOMP
]);
2295 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+1], rgba
[i
][GCOMP
]);
2296 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+2], rgba
[i
][RCOMP
]);
2297 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+3], rgba
[i
][ACOMP
]);
2302 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+0], rgba
[i
][ACOMP
]);
2303 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+1], rgba
[i
][BCOMP
]);
2304 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+2], rgba
[i
][GCOMP
]);
2305 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+3], rgba
[i
][RCOMP
]);
2311 dst
[i
*2+0] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
2312 dst
[i
*2+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
2316 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2322 GLshort
*dst
= (GLshort
*) dstAddr
;
2323 switch (dstFormat
) {
2326 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2330 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2334 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2338 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2342 dst
[i
] = FLOAT_TO_SHORT(luminance
[i
]);
2344 case GL_LUMINANCE_ALPHA
:
2346 dst
[i
*2+0] = FLOAT_TO_SHORT(luminance
[i
]);
2347 dst
[i
*2+1] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2352 dst
[i
*3+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2353 dst
[i
*3+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2354 dst
[i
*3+2] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2359 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2360 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2361 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2362 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2367 dst
[i
*3+0] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2368 dst
[i
*3+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2369 dst
[i
*3+2] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2374 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2375 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2376 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2377 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2382 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2383 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2384 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2385 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2391 dst
[i
*2+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2392 dst
[i
*2+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2396 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2400 case GL_UNSIGNED_INT
:
2402 GLuint
*dst
= (GLuint
*) dstAddr
;
2403 switch (dstFormat
) {
2406 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2410 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2414 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2418 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2422 dst
[i
] = FLOAT_TO_UINT(luminance
[i
]);
2424 case GL_LUMINANCE_ALPHA
:
2426 dst
[i
*2+0] = FLOAT_TO_UINT(luminance
[i
]);
2427 dst
[i
*2+1] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2432 dst
[i
*3+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2433 dst
[i
*3+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2434 dst
[i
*3+2] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2439 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2440 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2441 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2442 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2447 dst
[i
*3+0] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2448 dst
[i
*3+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2449 dst
[i
*3+2] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2454 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2455 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2456 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2457 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2462 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2463 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2464 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2465 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2471 dst
[i
*2+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2472 dst
[i
*2+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2476 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2482 GLint
*dst
= (GLint
*) dstAddr
;
2483 switch (dstFormat
) {
2486 dst
[i
] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2490 dst
[i
] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2494 dst
[i
] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2498 dst
[i
] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2502 dst
[i
] = FLOAT_TO_INT(luminance
[i
]);
2504 case GL_LUMINANCE_ALPHA
:
2506 dst
[i
*2+0] = FLOAT_TO_INT(luminance
[i
]);
2507 dst
[i
*2+1] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2512 dst
[i
*3+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2513 dst
[i
*3+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2514 dst
[i
*3+2] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2519 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2520 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2521 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2522 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2527 dst
[i
*3+0] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2528 dst
[i
*3+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2529 dst
[i
*3+2] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2534 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2535 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2536 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2537 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2542 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2543 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2544 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2545 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2551 dst
[i
*2+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2552 dst
[i
*2+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2556 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2562 GLfloat
*dst
= (GLfloat
*) dstAddr
;
2563 switch (dstFormat
) {
2566 dst
[i
] = rgba
[i
][RCOMP
];
2570 dst
[i
] = rgba
[i
][GCOMP
];
2574 dst
[i
] = rgba
[i
][BCOMP
];
2578 dst
[i
] = rgba
[i
][ACOMP
];
2582 dst
[i
] = luminance
[i
];
2584 case GL_LUMINANCE_ALPHA
:
2586 dst
[i
*2+0] = luminance
[i
];
2587 dst
[i
*2+1] = rgba
[i
][ACOMP
];
2592 dst
[i
*3+0] = rgba
[i
][RCOMP
];
2593 dst
[i
*3+1] = rgba
[i
][GCOMP
];
2594 dst
[i
*3+2] = rgba
[i
][BCOMP
];
2599 dst
[i
*4+0] = rgba
[i
][RCOMP
];
2600 dst
[i
*4+1] = rgba
[i
][GCOMP
];
2601 dst
[i
*4+2] = rgba
[i
][BCOMP
];
2602 dst
[i
*4+3] = rgba
[i
][ACOMP
];
2607 dst
[i
*3+0] = rgba
[i
][BCOMP
];
2608 dst
[i
*3+1] = rgba
[i
][GCOMP
];
2609 dst
[i
*3+2] = rgba
[i
][RCOMP
];
2614 dst
[i
*4+0] = rgba
[i
][BCOMP
];
2615 dst
[i
*4+1] = rgba
[i
][GCOMP
];
2616 dst
[i
*4+2] = rgba
[i
][RCOMP
];
2617 dst
[i
*4+3] = rgba
[i
][ACOMP
];
2622 dst
[i
*4+0] = rgba
[i
][ACOMP
];
2623 dst
[i
*4+1] = rgba
[i
][BCOMP
];
2624 dst
[i
*4+2] = rgba
[i
][GCOMP
];
2625 dst
[i
*4+3] = rgba
[i
][RCOMP
];
2631 dst
[i
*2+0] = rgba
[i
][RCOMP
];
2632 dst
[i
*2+1] = rgba
[i
][GCOMP
];
2636 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2640 case GL_HALF_FLOAT_ARB
:
2642 GLhalfARB
*dst
= (GLhalfARB
*) dstAddr
;
2643 switch (dstFormat
) {
2646 dst
[i
] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2650 dst
[i
] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2654 dst
[i
] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2658 dst
[i
] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2662 dst
[i
] = _mesa_float_to_half(luminance
[i
]);
2664 case GL_LUMINANCE_ALPHA
:
2666 dst
[i
*2+0] = _mesa_float_to_half(luminance
[i
]);
2667 dst
[i
*2+1] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2672 dst
[i
*3+0] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2673 dst
[i
*3+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2674 dst
[i
*3+2] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2679 dst
[i
*4+0] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2680 dst
[i
*4+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2681 dst
[i
*4+2] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2682 dst
[i
*4+3] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2687 dst
[i
*3+0] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2688 dst
[i
*3+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2689 dst
[i
*3+2] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2694 dst
[i
*4+0] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2695 dst
[i
*4+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2696 dst
[i
*4+2] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2697 dst
[i
*4+3] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2702 dst
[i
*4+0] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2703 dst
[i
*4+1] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2704 dst
[i
*4+2] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2705 dst
[i
*4+3] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2711 dst
[i
*2+0] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2712 dst
[i
*2+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2716 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2720 case GL_UNSIGNED_BYTE_3_3_2
:
2721 if (dstFormat
== GL_RGB
) {
2722 GLubyte
*dst
= (GLubyte
*) dstAddr
;
2724 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 7.0F
) << 5)
2725 | (IROUND(rgba
[i
][GCOMP
] * 7.0F
) << 2)
2726 | (IROUND(rgba
[i
][BCOMP
] * 3.0F
) );
2730 case GL_UNSIGNED_BYTE_2_3_3_REV
:
2731 if (dstFormat
== GL_RGB
) {
2732 GLubyte
*dst
= (GLubyte
*) dstAddr
;
2734 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 7.0F
) )
2735 | (IROUND(rgba
[i
][GCOMP
] * 7.0F
) << 3)
2736 | (IROUND(rgba
[i
][BCOMP
] * 3.0F
) << 6);
2740 case GL_UNSIGNED_SHORT_5_6_5
:
2741 if (dstFormat
== GL_RGB
) {
2742 GLushort
*dst
= (GLushort
*) dstAddr
;
2744 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 11)
2745 | (IROUND(rgba
[i
][GCOMP
] * 63.0F
) << 5)
2746 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) );
2750 case GL_UNSIGNED_SHORT_5_6_5_REV
:
2751 if (dstFormat
== GL_RGB
) {
2752 GLushort
*dst
= (GLushort
*) dstAddr
;
2754 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) )
2755 | (IROUND(rgba
[i
][GCOMP
] * 63.0F
) << 5)
2756 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 11);
2760 case GL_UNSIGNED_SHORT_4_4_4_4
:
2761 if (dstFormat
== GL_RGBA
) {
2762 GLushort
*dst
= (GLushort
*) dstAddr
;
2764 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 12)
2765 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 8)
2766 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 4)
2767 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) );
2770 else if (dstFormat
== GL_BGRA
) {
2771 GLushort
*dst
= (GLushort
*) dstAddr
;
2773 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 12)
2774 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 8)
2775 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 4)
2776 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) );
2779 else if (dstFormat
== GL_ABGR_EXT
) {
2780 GLushort
*dst
= (GLushort
*) dstAddr
;
2782 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 15.0F
) << 12)
2783 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 8)
2784 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 4)
2785 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) );
2789 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
2790 if (dstFormat
== GL_RGBA
) {
2791 GLushort
*dst
= (GLushort
*) dstAddr
;
2793 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 15.0F
) )
2794 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 4)
2795 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 8)
2796 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) << 12);
2799 else if (dstFormat
== GL_BGRA
) {
2800 GLushort
*dst
= (GLushort
*) dstAddr
;
2802 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 15.0F
) )
2803 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 4)
2804 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 8)
2805 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) << 12);
2808 else if (dstFormat
== GL_ABGR_EXT
) {
2809 GLushort
*dst
= (GLushort
*) dstAddr
;
2811 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 15.0F
) )
2812 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 4)
2813 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 8)
2814 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 12);
2818 case GL_UNSIGNED_SHORT_5_5_5_1
:
2819 if (dstFormat
== GL_RGBA
) {
2820 GLushort
*dst
= (GLushort
*) dstAddr
;
2822 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 11)
2823 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 6)
2824 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 1)
2825 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) );
2828 else if (dstFormat
== GL_BGRA
) {
2829 GLushort
*dst
= (GLushort
*) dstAddr
;
2831 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 11)
2832 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 6)
2833 | (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 1)
2834 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) );
2837 else if (dstFormat
== GL_ABGR_EXT
) {
2838 GLushort
*dst
= (GLushort
*) dstAddr
;
2840 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 31.0F
) << 11)
2841 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 6)
2842 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 1)
2843 | (IROUND(rgba
[i
][RCOMP
] * 1.0F
) );
2847 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
2848 if (dstFormat
== GL_RGBA
) {
2849 GLushort
*dst
= (GLushort
*) dstAddr
;
2851 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) )
2852 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 5)
2853 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 10)
2854 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) << 15);
2857 else if (dstFormat
== GL_BGRA
) {
2858 GLushort
*dst
= (GLushort
*) dstAddr
;
2860 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 31.0F
) )
2861 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 5)
2862 | (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 10)
2863 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) << 15);
2866 else if (dstFormat
== GL_ABGR_EXT
) {
2867 GLushort
*dst
= (GLushort
*) dstAddr
;
2869 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 31.0F
) )
2870 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 5)
2871 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 10)
2872 | (IROUND(rgba
[i
][RCOMP
] * 1.0F
) << 15);
2876 case GL_UNSIGNED_INT_8_8_8_8
:
2877 if (dstFormat
== GL_RGBA
) {
2878 GLuint
*dst
= (GLuint
*) dstAddr
;
2880 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 255.F
) << 24)
2881 | (IROUND(rgba
[i
][GCOMP
] * 255.F
) << 16)
2882 | (IROUND(rgba
[i
][BCOMP
] * 255.F
) << 8)
2883 | (IROUND(rgba
[i
][ACOMP
] * 255.F
) );
2886 else if (dstFormat
== GL_BGRA
) {
2887 GLuint
*dst
= (GLuint
*) dstAddr
;
2889 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 255.F
) << 24)
2890 | (IROUND(rgba
[i
][GCOMP
] * 255.F
) << 16)
2891 | (IROUND(rgba
[i
][RCOMP
] * 255.F
) << 8)
2892 | (IROUND(rgba
[i
][ACOMP
] * 255.F
) );
2895 else if (dstFormat
== GL_ABGR_EXT
) {
2896 GLuint
*dst
= (GLuint
*) dstAddr
;
2898 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 255.F
) << 24)
2899 | (IROUND(rgba
[i
][BCOMP
] * 255.F
) << 16)
2900 | (IROUND(rgba
[i
][GCOMP
] * 255.F
) << 8)
2901 | (IROUND(rgba
[i
][RCOMP
] * 255.F
) );
2905 case GL_UNSIGNED_INT_8_8_8_8_REV
:
2906 if (dstFormat
== GL_RGBA
) {
2907 GLuint
*dst
= (GLuint
*) dstAddr
;
2909 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 255.0F
) )
2910 | (IROUND(rgba
[i
][GCOMP
] * 255.0F
) << 8)
2911 | (IROUND(rgba
[i
][BCOMP
] * 255.0F
) << 16)
2912 | (IROUND(rgba
[i
][ACOMP
] * 255.0F
) << 24);
2915 else if (dstFormat
== GL_BGRA
) {
2916 GLuint
*dst
= (GLuint
*) dstAddr
;
2918 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 255.0F
) )
2919 | (IROUND(rgba
[i
][GCOMP
] * 255.0F
) << 8)
2920 | (IROUND(rgba
[i
][RCOMP
] * 255.0F
) << 16)
2921 | (IROUND(rgba
[i
][ACOMP
] * 255.0F
) << 24);
2924 else if (dstFormat
== GL_ABGR_EXT
) {
2925 GLuint
*dst
= (GLuint
*) dstAddr
;
2927 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 255.0F
) )
2928 | (IROUND(rgba
[i
][BCOMP
] * 255.0F
) << 8)
2929 | (IROUND(rgba
[i
][GCOMP
] * 255.0F
) << 16)
2930 | (IROUND(rgba
[i
][RCOMP
] * 255.0F
) << 24);
2934 case GL_UNSIGNED_INT_10_10_10_2
:
2935 if (dstFormat
== GL_RGBA
) {
2936 GLuint
*dst
= (GLuint
*) dstAddr
;
2938 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) << 22)
2939 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 12)
2940 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 2)
2941 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) );
2944 else if (dstFormat
== GL_BGRA
) {
2945 GLuint
*dst
= (GLuint
*) dstAddr
;
2947 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 22)
2948 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 12)
2949 | (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) << 2)
2950 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) );
2953 else if (dstFormat
== GL_ABGR_EXT
) {
2954 GLuint
*dst
= (GLuint
*) dstAddr
;
2956 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 1023.0F
) << 22)
2957 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 12)
2958 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 2)
2959 | (IROUND(rgba
[i
][RCOMP
] * 3.0F
) );
2963 case GL_UNSIGNED_INT_2_10_10_10_REV
:
2964 if (dstFormat
== GL_RGBA
) {
2965 GLuint
*dst
= (GLuint
*) dstAddr
;
2967 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) )
2968 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 10)
2969 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 20)
2970 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) << 30);
2973 else if (dstFormat
== GL_BGRA
) {
2974 GLuint
*dst
= (GLuint
*) dstAddr
;
2976 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) )
2977 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 10)
2978 | (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) << 20)
2979 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) << 30);
2982 else if (dstFormat
== GL_ABGR_EXT
) {
2983 GLuint
*dst
= (GLuint
*) dstAddr
;
2985 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 1023.0F
) )
2986 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 10)
2987 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 20)
2988 | (IROUND(rgba
[i
][RCOMP
] * 3.0F
) << 30);
2993 _mesa_problem(ctx
, "bad type in _mesa_pack_rgba_span_float");
2997 if (dstPacking
->SwapBytes
) {
2998 GLint swapSize
= _mesa_sizeof_packed_type(dstType
);
2999 if (swapSize
== 2) {
3000 if (dstPacking
->SwapBytes
) {
3001 _mesa_swap2((GLushort
*) dstAddr
, n
* comps
);
3004 else if (swapSize
== 4) {
3005 if (dstPacking
->SwapBytes
) {
3006 _mesa_swap4((GLuint
*) dstAddr
, n
* comps
);
3013 #define SWAP2BYTE(VALUE) \
3015 GLubyte *bytes = (GLubyte *) &(VALUE); \
3016 GLubyte tmp = bytes[0]; \
3017 bytes[0] = bytes[1]; \
3021 #define SWAP4BYTE(VALUE) \
3023 GLubyte *bytes = (GLubyte *) &(VALUE); \
3024 GLubyte tmp = bytes[0]; \
3025 bytes[0] = bytes[3]; \
3028 bytes[1] = bytes[2]; \
3034 extract_uint_indexes(GLuint n
, GLuint indexes
[],
3035 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
3036 const struct gl_pixelstore_attrib
*unpack
)
3038 ASSERT(srcFormat
== GL_COLOR_INDEX
|| srcFormat
== GL_STENCIL_INDEX
);
3040 ASSERT(srcType
== GL_BITMAP
||
3041 srcType
== GL_UNSIGNED_BYTE
||
3042 srcType
== GL_BYTE
||
3043 srcType
== GL_UNSIGNED_SHORT
||
3044 srcType
== GL_SHORT
||
3045 srcType
== GL_UNSIGNED_INT
||
3046 srcType
== GL_INT
||
3047 srcType
== GL_UNSIGNED_INT_24_8_EXT
||
3048 srcType
== GL_HALF_FLOAT_ARB
||
3049 srcType
== GL_FLOAT
);
3054 GLubyte
*ubsrc
= (GLubyte
*) src
;
3055 if (unpack
->LsbFirst
) {
3056 GLubyte mask
= 1 << (unpack
->SkipPixels
& 0x7);
3058 for (i
= 0; i
< n
; i
++) {
3059 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
3070 GLubyte mask
= 128 >> (unpack
->SkipPixels
& 0x7);
3072 for (i
= 0; i
< n
; i
++) {
3073 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
3085 case GL_UNSIGNED_BYTE
:
3088 const GLubyte
*s
= (const GLubyte
*) src
;
3089 for (i
= 0; i
< n
; i
++)
3096 const GLbyte
*s
= (const GLbyte
*) src
;
3097 for (i
= 0; i
< n
; i
++)
3101 case GL_UNSIGNED_SHORT
:
3104 const GLushort
*s
= (const GLushort
*) src
;
3105 if (unpack
->SwapBytes
) {
3106 for (i
= 0; i
< n
; i
++) {
3107 GLushort value
= s
[i
];
3113 for (i
= 0; i
< n
; i
++)
3121 const GLshort
*s
= (const GLshort
*) src
;
3122 if (unpack
->SwapBytes
) {
3123 for (i
= 0; i
< n
; i
++) {
3124 GLshort value
= s
[i
];
3130 for (i
= 0; i
< n
; i
++)
3135 case GL_UNSIGNED_INT
:
3138 const GLuint
*s
= (const GLuint
*) src
;
3139 if (unpack
->SwapBytes
) {
3140 for (i
= 0; i
< n
; i
++) {
3141 GLuint value
= s
[i
];
3147 for (i
= 0; i
< n
; i
++)
3155 const GLint
*s
= (const GLint
*) src
;
3156 if (unpack
->SwapBytes
) {
3157 for (i
= 0; i
< n
; i
++) {
3164 for (i
= 0; i
< n
; i
++)
3172 const GLfloat
*s
= (const GLfloat
*) src
;
3173 if (unpack
->SwapBytes
) {
3174 for (i
= 0; i
< n
; i
++) {
3175 GLfloat value
= s
[i
];
3177 indexes
[i
] = (GLuint
) value
;
3181 for (i
= 0; i
< n
; i
++)
3182 indexes
[i
] = (GLuint
) s
[i
];
3186 case GL_HALF_FLOAT_ARB
:
3189 const GLhalfARB
*s
= (const GLhalfARB
*) src
;
3190 if (unpack
->SwapBytes
) {
3191 for (i
= 0; i
< n
; i
++) {
3192 GLhalfARB value
= s
[i
];
3194 indexes
[i
] = (GLuint
) _mesa_half_to_float(value
);
3198 for (i
= 0; i
< n
; i
++)
3199 indexes
[i
] = (GLuint
) _mesa_half_to_float(s
[i
]);
3203 case GL_UNSIGNED_INT_24_8_EXT
:
3206 const GLuint
*s
= (const GLuint
*) src
;
3207 if (unpack
->SwapBytes
) {
3208 for (i
= 0; i
< n
; i
++) {
3209 GLuint value
= s
[i
];
3211 indexes
[i
] = value
& 0xff; /* lower 8 bits */
3215 for (i
= 0; i
< n
; i
++)
3216 indexes
[i
] = s
[i
] & 0xff; /* lower 8 bits */
3222 _mesa_problem(NULL
, "bad srcType in extract_uint_indexes");
3229 * This function extracts floating point RGBA values from arbitrary
3230 * image data. srcFormat and srcType are the format and type parameters
3231 * passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
3233 * Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
3234 * implements the "Conversion to floating point", "Conversion to RGB",
3235 * and "Final Expansion to RGBA" operations.
3237 * Args: n - number of pixels
3238 * rgba - output colors
3239 * srcFormat - format of incoming data
3240 * srcType - data type of incoming data
3241 * src - source data pointer
3242 * swapBytes - perform byteswapping of incoming data?
3245 extract_float_rgba(GLuint n
, GLfloat rgba
[][4],
3246 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
3247 GLboolean swapBytes
)
3249 GLint redIndex
, greenIndex
, blueIndex
, alphaIndex
;
3251 GLint rComp
, bComp
, gComp
, aComp
;
3252 GLboolean intFormat
;
3253 GLfloat rs
= 1.0f
, gs
= 1.0f
, bs
= 1.0f
, as
= 1.0f
; /* scale factors */
3255 ASSERT(srcFormat
== GL_RED
||
3256 srcFormat
== GL_GREEN
||
3257 srcFormat
== GL_BLUE
||
3258 srcFormat
== GL_ALPHA
||
3259 srcFormat
== GL_LUMINANCE
||
3260 srcFormat
== GL_LUMINANCE_ALPHA
||
3261 srcFormat
== GL_INTENSITY
||
3262 srcFormat
== GL_RG
||
3263 srcFormat
== GL_RGB
||
3264 srcFormat
== GL_BGR
||
3265 srcFormat
== GL_RGBA
||
3266 srcFormat
== GL_BGRA
||
3267 srcFormat
== GL_ABGR_EXT
||
3268 srcFormat
== GL_DU8DV8_ATI
||
3269 srcFormat
== GL_DUDV_ATI
||
3270 srcFormat
== GL_RED_INTEGER_EXT
||
3271 srcFormat
== GL_GREEN_INTEGER_EXT
||
3272 srcFormat
== GL_BLUE_INTEGER_EXT
||
3273 srcFormat
== GL_ALPHA_INTEGER_EXT
||
3274 srcFormat
== GL_RGB_INTEGER_EXT
||
3275 srcFormat
== GL_RGBA_INTEGER_EXT
||
3276 srcFormat
== GL_BGR_INTEGER_EXT
||
3277 srcFormat
== GL_BGRA_INTEGER_EXT
||
3278 srcFormat
== GL_LUMINANCE_INTEGER_EXT
||
3279 srcFormat
== GL_LUMINANCE_ALPHA_INTEGER_EXT
);
3281 ASSERT(srcType
== GL_UNSIGNED_BYTE
||
3282 srcType
== GL_BYTE
||
3283 srcType
== GL_UNSIGNED_SHORT
||
3284 srcType
== GL_SHORT
||
3285 srcType
== GL_UNSIGNED_INT
||
3286 srcType
== GL_INT
||
3287 srcType
== GL_HALF_FLOAT_ARB
||
3288 srcType
== GL_FLOAT
||
3289 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
3290 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
3291 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
3292 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
3293 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
3294 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
3295 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
3296 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
3297 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
3298 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
3299 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
3300 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
3302 rComp
= gComp
= bComp
= aComp
= -1;
3304 switch (srcFormat
) {
3306 case GL_RED_INTEGER_EXT
:
3308 greenIndex
= blueIndex
= alphaIndex
= -1;
3312 case GL_GREEN_INTEGER_EXT
:
3314 redIndex
= blueIndex
= alphaIndex
= -1;
3318 case GL_BLUE_INTEGER_EXT
:
3320 redIndex
= greenIndex
= alphaIndex
= -1;
3324 case GL_ALPHA_INTEGER_EXT
:
3325 redIndex
= greenIndex
= blueIndex
= -1;
3330 case GL_LUMINANCE_INTEGER_EXT
:
3331 redIndex
= greenIndex
= blueIndex
= 0;
3335 case GL_LUMINANCE_ALPHA
:
3336 case GL_LUMINANCE_ALPHA_INTEGER_EXT
:
3337 redIndex
= greenIndex
= blueIndex
= 0;
3342 redIndex
= greenIndex
= blueIndex
= alphaIndex
= 0;
3358 case GL_RGB_INTEGER
:
3381 case GL_RGBA_INTEGER
:
3423 _mesa_problem(NULL
, "bad srcFormat %s in extract float data",
3424 _mesa_lookup_enum_by_nr(srcFormat
));
3428 intFormat
= _mesa_is_integer_format(srcFormat
);
3430 #define PROCESS(INDEX, CHANNEL, DEFAULT, DEFAULT_INT, TYPE, CONVERSION) \
3431 if ((INDEX) < 0) { \
3434 for (i = 0; i < n; i++) { \
3435 rgba[i][CHANNEL] = DEFAULT_INT; \
3439 for (i = 0; i < n; i++) { \
3440 rgba[i][CHANNEL] = DEFAULT; \
3444 else if (swapBytes) { \
3445 const TYPE *s = (const TYPE *) src; \
3447 for (i = 0; i < n; i++) { \
3448 TYPE value = s[INDEX]; \
3449 if (sizeof(TYPE) == 2) { \
3452 else if (sizeof(TYPE) == 4) { \
3456 rgba[i][CHANNEL] = (GLfloat) value; \
3458 rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
3463 const TYPE *s = (const TYPE *) src; \
3466 for (i = 0; i < n; i++) { \
3467 rgba[i][CHANNEL] = (GLfloat) s[INDEX]; \
3472 for (i = 0; i < n; i++) { \
3473 rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
3480 case GL_UNSIGNED_BYTE
:
3481 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLubyte
, UBYTE_TO_FLOAT
);
3482 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLubyte
, UBYTE_TO_FLOAT
);
3483 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLubyte
, UBYTE_TO_FLOAT
);
3484 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 255, GLubyte
, UBYTE_TO_FLOAT
);
3487 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLbyte
, BYTE_TO_FLOAT
);
3488 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLbyte
, BYTE_TO_FLOAT
);
3489 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLbyte
, BYTE_TO_FLOAT
);
3490 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 127, GLbyte
, BYTE_TO_FLOAT
);
3492 case GL_UNSIGNED_SHORT
:
3493 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLushort
, USHORT_TO_FLOAT
);
3494 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLushort
, USHORT_TO_FLOAT
);
3495 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLushort
, USHORT_TO_FLOAT
);
3496 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 0xffff, GLushort
, USHORT_TO_FLOAT
);
3499 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLshort
, SHORT_TO_FLOAT
);
3500 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLshort
, SHORT_TO_FLOAT
);
3501 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLshort
, SHORT_TO_FLOAT
);
3502 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 32767, GLshort
, SHORT_TO_FLOAT
);
3504 case GL_UNSIGNED_INT
:
3505 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLuint
, UINT_TO_FLOAT
);
3506 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLuint
, UINT_TO_FLOAT
);
3507 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLuint
, UINT_TO_FLOAT
);
3508 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 0xffffffff, GLuint
, UINT_TO_FLOAT
);
3511 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLint
, INT_TO_FLOAT
);
3512 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLint
, INT_TO_FLOAT
);
3513 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLint
, INT_TO_FLOAT
);
3514 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 2147483647, GLint
, INT_TO_FLOAT
);
3517 PROCESS(redIndex
, RCOMP
, 0.0F
, 0.0F
, GLfloat
, (GLfloat
));
3518 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0.0F
, GLfloat
, (GLfloat
));
3519 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0.0F
, GLfloat
, (GLfloat
));
3520 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 1.0F
, GLfloat
, (GLfloat
));
3522 case GL_HALF_FLOAT_ARB
:
3523 PROCESS(redIndex
, RCOMP
, 0.0F
, 0.0F
, GLhalfARB
, _mesa_half_to_float
);
3524 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0.0F
, GLhalfARB
, _mesa_half_to_float
);
3525 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0.0F
, GLhalfARB
, _mesa_half_to_float
);
3526 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 1.0F
, GLhalfARB
, _mesa_half_to_float
);
3528 case GL_UNSIGNED_BYTE_3_3_2
:
3530 const GLubyte
*ubsrc
= (const GLubyte
*) src
;
3537 for (i
= 0; i
< n
; i
++) {
3538 GLubyte p
= ubsrc
[i
];
3539 rgba
[i
][rComp
] = ((p
>> 5) ) * rs
;
3540 rgba
[i
][gComp
] = ((p
>> 2) & 0x7) * gs
;
3541 rgba
[i
][bComp
] = ((p
) & 0x3) * bs
;
3542 rgba
[i
][aComp
] = 1.0F
;
3546 case GL_UNSIGNED_BYTE_2_3_3_REV
:
3548 const GLubyte
*ubsrc
= (const GLubyte
*) src
;
3555 for (i
= 0; i
< n
; i
++) {
3556 GLubyte p
= ubsrc
[i
];
3557 rgba
[i
][rComp
] = ((p
) & 0x7) * rs
;
3558 rgba
[i
][gComp
] = ((p
>> 3) & 0x7) * gs
;
3559 rgba
[i
][bComp
] = ((p
>> 6) ) * bs
;
3560 rgba
[i
][aComp
] = 1.0F
;
3564 case GL_UNSIGNED_SHORT_5_6_5
:
3571 const GLushort
*ussrc
= (const GLushort
*) src
;
3573 for (i
= 0; i
< n
; i
++) {
3574 GLushort p
= ussrc
[i
];
3576 rgba
[i
][rComp
] = ((p
>> 11) ) * rs
;
3577 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * gs
;
3578 rgba
[i
][bComp
] = ((p
) & 0x1f) * bs
;
3579 rgba
[i
][aComp
] = 1.0F
;
3583 const GLushort
*ussrc
= (const GLushort
*) src
;
3585 for (i
= 0; i
< n
; i
++) {
3586 GLushort p
= ussrc
[i
];
3587 rgba
[i
][rComp
] = ((p
>> 11) ) * rs
;
3588 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * gs
;
3589 rgba
[i
][bComp
] = ((p
) & 0x1f) * bs
;
3590 rgba
[i
][aComp
] = 1.0F
;
3594 case GL_UNSIGNED_SHORT_5_6_5_REV
:
3601 const GLushort
*ussrc
= (const GLushort
*) src
;
3603 for (i
= 0; i
< n
; i
++) {
3604 GLushort p
= ussrc
[i
];
3606 rgba
[i
][rComp
] = ((p
) & 0x1f) * rs
;
3607 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * gs
;
3608 rgba
[i
][bComp
] = ((p
>> 11) ) * bs
;
3609 rgba
[i
][aComp
] = 1.0F
;
3613 const GLushort
*ussrc
= (const GLushort
*) src
;
3615 for (i
= 0; i
< n
; i
++) {
3616 GLushort p
= ussrc
[i
];
3617 rgba
[i
][rComp
] = ((p
) & 0x1f) * rs
;
3618 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * gs
;
3619 rgba
[i
][bComp
] = ((p
>> 11) ) * bs
;
3620 rgba
[i
][aComp
] = 1.0F
;
3624 case GL_UNSIGNED_SHORT_4_4_4_4
:
3626 rs
= gs
= bs
= as
= 1.0F
/ 15.0F
;
3629 const GLushort
*ussrc
= (const GLushort
*) src
;
3631 for (i
= 0; i
< n
; i
++) {
3632 GLushort p
= ussrc
[i
];
3634 rgba
[i
][rComp
] = ((p
>> 12) ) * rs
;
3635 rgba
[i
][gComp
] = ((p
>> 8) & 0xf) * gs
;
3636 rgba
[i
][bComp
] = ((p
>> 4) & 0xf) * bs
;
3637 rgba
[i
][aComp
] = ((p
) & 0xf) * as
;
3641 const GLushort
*ussrc
= (const GLushort
*) src
;
3643 for (i
= 0; i
< n
; i
++) {
3644 GLushort p
= ussrc
[i
];
3645 rgba
[i
][rComp
] = ((p
>> 12) ) * rs
;
3646 rgba
[i
][gComp
] = ((p
>> 8) & 0xf) * gs
;
3647 rgba
[i
][bComp
] = ((p
>> 4) & 0xf) * bs
;
3648 rgba
[i
][aComp
] = ((p
) & 0xf) * as
;
3652 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
3654 rs
= gs
= bs
= as
= 1.0F
/ 15.0F
;
3657 const GLushort
*ussrc
= (const GLushort
*) src
;
3659 for (i
= 0; i
< n
; i
++) {
3660 GLushort p
= ussrc
[i
];
3662 rgba
[i
][rComp
] = ((p
) & 0xf) * rs
;
3663 rgba
[i
][gComp
] = ((p
>> 4) & 0xf) * gs
;
3664 rgba
[i
][bComp
] = ((p
>> 8) & 0xf) * bs
;
3665 rgba
[i
][aComp
] = ((p
>> 12) ) * as
;
3669 const GLushort
*ussrc
= (const GLushort
*) src
;
3671 for (i
= 0; i
< n
; i
++) {
3672 GLushort p
= ussrc
[i
];
3673 rgba
[i
][rComp
] = ((p
) & 0xf) * rs
;
3674 rgba
[i
][gComp
] = ((p
>> 4) & 0xf) * gs
;
3675 rgba
[i
][bComp
] = ((p
>> 8) & 0xf) * bs
;
3676 rgba
[i
][aComp
] = ((p
>> 12) ) * as
;
3680 case GL_UNSIGNED_SHORT_5_5_5_1
:
3682 rs
= gs
= bs
= 1.0F
/ 31.0F
;
3685 const GLushort
*ussrc
= (const GLushort
*) src
;
3687 for (i
= 0; i
< n
; i
++) {
3688 GLushort p
= ussrc
[i
];
3690 rgba
[i
][rComp
] = ((p
>> 11) ) * rs
;
3691 rgba
[i
][gComp
] = ((p
>> 6) & 0x1f) * gs
;
3692 rgba
[i
][bComp
] = ((p
>> 1) & 0x1f) * bs
;
3693 rgba
[i
][aComp
] = ((p
) & 0x1) * as
;
3697 const GLushort
*ussrc
= (const GLushort
*) src
;
3699 for (i
= 0; i
< n
; i
++) {
3700 GLushort p
= ussrc
[i
];
3701 rgba
[i
][rComp
] = ((p
>> 11) ) * rs
;
3702 rgba
[i
][gComp
] = ((p
>> 6) & 0x1f) * gs
;
3703 rgba
[i
][bComp
] = ((p
>> 1) & 0x1f) * bs
;
3704 rgba
[i
][aComp
] = ((p
) & 0x1) * as
;
3708 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
3710 rs
= gs
= bs
= 1.0F
/ 31.0F
;
3713 const GLushort
*ussrc
= (const GLushort
*) src
;
3715 for (i
= 0; i
< n
; i
++) {
3716 GLushort p
= ussrc
[i
];
3718 rgba
[i
][rComp
] = ((p
) & 0x1f) * rs
;
3719 rgba
[i
][gComp
] = ((p
>> 5) & 0x1f) * gs
;
3720 rgba
[i
][bComp
] = ((p
>> 10) & 0x1f) * bs
;
3721 rgba
[i
][aComp
] = ((p
>> 15) ) * as
;
3725 const GLushort
*ussrc
= (const GLushort
*) src
;
3727 for (i
= 0; i
< n
; i
++) {
3728 GLushort p
= ussrc
[i
];
3729 rgba
[i
][rComp
] = ((p
) & 0x1f) * rs
;
3730 rgba
[i
][gComp
] = ((p
>> 5) & 0x1f) * gs
;
3731 rgba
[i
][bComp
] = ((p
>> 10) & 0x1f) * bs
;
3732 rgba
[i
][aComp
] = ((p
>> 15) ) * as
;
3736 case GL_UNSIGNED_INT_8_8_8_8
:
3738 const GLuint
*uisrc
= (const GLuint
*) src
;
3741 for (i
= 0; i
< n
; i
++) {
3742 GLuint p
= uisrc
[i
];
3743 rgba
[i
][rComp
] = (GLfloat
) ((p
) & 0xff);
3744 rgba
[i
][gComp
] = (GLfloat
) ((p
>> 8) & 0xff);
3745 rgba
[i
][bComp
] = (GLfloat
) ((p
>> 16) & 0xff);
3746 rgba
[i
][aComp
] = (GLfloat
) ((p
>> 24) );
3750 for (i
= 0; i
< n
; i
++) {
3751 GLuint p
= uisrc
[i
];
3752 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3753 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3754 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3755 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3760 const GLuint
*uisrc
= (const GLuint
*) src
;
3763 for (i
= 0; i
< n
; i
++) {
3764 GLuint p
= uisrc
[i
];
3765 rgba
[i
][rComp
] = (GLfloat
) ((p
>> 24) );
3766 rgba
[i
][gComp
] = (GLfloat
) ((p
>> 16) & 0xff);
3767 rgba
[i
][bComp
] = (GLfloat
) ((p
>> 8) & 0xff);
3768 rgba
[i
][aComp
] = (GLfloat
) ((p
) & 0xff);
3772 for (i
= 0; i
< n
; i
++) {
3773 GLuint p
= uisrc
[i
];
3774 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3775 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3776 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3777 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3782 case GL_UNSIGNED_INT_8_8_8_8_REV
:
3784 const GLuint
*uisrc
= (const GLuint
*) src
;
3787 for (i
= 0; i
< n
; i
++) {
3788 GLuint p
= uisrc
[i
];
3789 rgba
[i
][rComp
] = (GLfloat
) ((p
>> 24) );
3790 rgba
[i
][gComp
] = (GLfloat
) ((p
>> 16) & 0xff);
3791 rgba
[i
][bComp
] = (GLfloat
) ((p
>> 8) & 0xff);
3792 rgba
[i
][aComp
] = (GLfloat
) ((p
) & 0xff);
3796 for (i
= 0; i
< n
; i
++) {
3797 GLuint p
= uisrc
[i
];
3798 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3799 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3800 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3801 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3806 const GLuint
*uisrc
= (const GLuint
*) src
;
3809 for (i
= 0; i
< n
; i
++) {
3810 GLuint p
= uisrc
[i
];
3811 rgba
[i
][rComp
] = (GLfloat
) ((p
) & 0xff);
3812 rgba
[i
][gComp
] = (GLfloat
) ((p
>> 8) & 0xff);
3813 rgba
[i
][bComp
] = (GLfloat
) ((p
>> 16) & 0xff);
3814 rgba
[i
][aComp
] = (GLfloat
) ((p
>> 24) );
3818 for (i
= 0; i
< n
; i
++) {
3819 GLuint p
= uisrc
[i
];
3820 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3821 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3822 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3823 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3828 case GL_UNSIGNED_INT_10_10_10_2
:
3830 rs
= 1.0F
/ 1023.0F
;
3831 gs
= 1.0F
/ 1023.0F
;
3832 bs
= 1.0F
/ 1023.0F
;
3836 const GLuint
*uisrc
= (const GLuint
*) src
;
3838 for (i
= 0; i
< n
; i
++) {
3839 GLuint p
= uisrc
[i
];
3841 rgba
[i
][rComp
] = ((p
>> 22) ) * rs
;
3842 rgba
[i
][gComp
] = ((p
>> 12) & 0x3ff) * gs
;
3843 rgba
[i
][bComp
] = ((p
>> 2) & 0x3ff) * bs
;
3844 rgba
[i
][aComp
] = ((p
) & 0x3 ) * as
;
3848 const GLuint
*uisrc
= (const GLuint
*) src
;
3850 for (i
= 0; i
< n
; i
++) {
3851 GLuint p
= uisrc
[i
];
3852 rgba
[i
][rComp
] = ((p
>> 22) ) * rs
;
3853 rgba
[i
][gComp
] = ((p
>> 12) & 0x3ff) * gs
;
3854 rgba
[i
][bComp
] = ((p
>> 2) & 0x3ff) * bs
;
3855 rgba
[i
][aComp
] = ((p
) & 0x3 ) * as
;
3859 case GL_UNSIGNED_INT_2_10_10_10_REV
:
3861 rs
= 1.0F
/ 1023.0F
;
3862 gs
= 1.0F
/ 1023.0F
;
3863 bs
= 1.0F
/ 1023.0F
;
3867 const GLuint
*uisrc
= (const GLuint
*) src
;
3869 for (i
= 0; i
< n
; i
++) {
3870 GLuint p
= uisrc
[i
];
3872 rgba
[i
][rComp
] = ((p
) & 0x3ff) * rs
;
3873 rgba
[i
][gComp
] = ((p
>> 10) & 0x3ff) * gs
;
3874 rgba
[i
][bComp
] = ((p
>> 20) & 0x3ff) * bs
;
3875 rgba
[i
][aComp
] = ((p
>> 30) ) * as
;
3879 const GLuint
*uisrc
= (const GLuint
*) src
;
3881 for (i
= 0; i
< n
; i
++) {
3882 GLuint p
= uisrc
[i
];
3883 rgba
[i
][rComp
] = ((p
) & 0x3ff) * rs
;
3884 rgba
[i
][gComp
] = ((p
>> 10) & 0x3ff) * gs
;
3885 rgba
[i
][bComp
] = ((p
>> 20) & 0x3ff) * bs
;
3886 rgba
[i
][aComp
] = ((p
>> 30) ) * as
;
3891 _mesa_problem(NULL
, "bad srcType in extract float data");
3898 * Unpack a row of color image data from a client buffer according to
3899 * the pixel unpacking parameters.
3900 * Return GLchan values in the specified dest image format.
3901 * This is used by glDrawPixels and glTexImage?D().
3902 * \param ctx - the context
3903 * n - number of pixels in the span
3904 * dstFormat - format of destination color array
3905 * dest - the destination color array
3906 * srcFormat - source image format
3907 * srcType - source image data type
3908 * source - source image pointer
3909 * srcPacking - pixel unpacking parameters
3910 * transferOps - bitmask of IMAGE_*_BIT values of operations to apply
3912 * XXX perhaps expand this to process whole images someday.
3915 _mesa_unpack_color_span_chan( struct gl_context
*ctx
,
3916 GLuint n
, GLenum dstFormat
, GLchan dest
[],
3917 GLenum srcFormat
, GLenum srcType
,
3918 const GLvoid
*source
,
3919 const struct gl_pixelstore_attrib
*srcPacking
,
3920 GLbitfield transferOps
)
3922 ASSERT(dstFormat
== GL_ALPHA
||
3923 dstFormat
== GL_LUMINANCE
||
3924 dstFormat
== GL_LUMINANCE_ALPHA
||
3925 dstFormat
== GL_INTENSITY
||
3926 dstFormat
== GL_RED
||
3927 dstFormat
== GL_RG
||
3928 dstFormat
== GL_RGB
||
3929 dstFormat
== GL_RGBA
||
3930 dstFormat
== GL_COLOR_INDEX
);
3932 ASSERT(srcFormat
== GL_RED
||
3933 srcFormat
== GL_GREEN
||
3934 srcFormat
== GL_BLUE
||
3935 srcFormat
== GL_ALPHA
||
3936 srcFormat
== GL_LUMINANCE
||
3937 srcFormat
== GL_LUMINANCE_ALPHA
||
3938 srcFormat
== GL_INTENSITY
||
3939 srcFormat
== GL_RG
||
3940 srcFormat
== GL_RGB
||
3941 srcFormat
== GL_BGR
||
3942 srcFormat
== GL_RGBA
||
3943 srcFormat
== GL_BGRA
||
3944 srcFormat
== GL_ABGR_EXT
||
3945 srcFormat
== GL_COLOR_INDEX
);
3947 ASSERT(srcType
== GL_BITMAP
||
3948 srcType
== GL_UNSIGNED_BYTE
||
3949 srcType
== GL_BYTE
||
3950 srcType
== GL_UNSIGNED_SHORT
||
3951 srcType
== GL_SHORT
||
3952 srcType
== GL_UNSIGNED_INT
||
3953 srcType
== GL_INT
||
3954 srcType
== GL_HALF_FLOAT_ARB
||
3955 srcType
== GL_FLOAT
||
3956 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
3957 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
3958 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
3959 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
3960 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
3961 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
3962 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
3963 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
3964 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
3965 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
3966 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
3967 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
3969 /* Try simple cases first */
3970 if (transferOps
== 0) {
3971 if (srcType
== CHAN_TYPE
) {
3972 if (dstFormat
== GL_RGBA
) {
3973 if (srcFormat
== GL_RGBA
) {
3974 memcpy( dest
, source
, n
* 4 * sizeof(GLchan
) );
3977 else if (srcFormat
== GL_RGB
) {
3979 const GLchan
*src
= (const GLchan
*) source
;
3981 for (i
= 0; i
< n
; i
++) {
3992 else if (dstFormat
== GL_RGB
) {
3993 if (srcFormat
== GL_RGB
) {
3994 memcpy( dest
, source
, n
* 3 * sizeof(GLchan
) );
3997 else if (srcFormat
== GL_RGBA
) {
3999 const GLchan
*src
= (const GLchan
*) source
;
4001 for (i
= 0; i
< n
; i
++) {
4011 else if (dstFormat
== srcFormat
) {
4012 GLint comps
= _mesa_components_in_format(srcFormat
);
4014 memcpy( dest
, source
, n
* comps
* sizeof(GLchan
) );
4019 * Common situation, loading 8bit RGBA/RGB source images
4020 * into 16/32 bit destination. (OSMesa16/32)
4022 else if (srcType
== GL_UNSIGNED_BYTE
) {
4023 if (dstFormat
== GL_RGBA
) {
4024 if (srcFormat
== GL_RGB
) {
4026 const GLubyte
*src
= (const GLubyte
*) source
;
4028 for (i
= 0; i
< n
; i
++) {
4029 dst
[0] = UBYTE_TO_CHAN(src
[0]);
4030 dst
[1] = UBYTE_TO_CHAN(src
[1]);
4031 dst
[2] = UBYTE_TO_CHAN(src
[2]);
4038 else if (srcFormat
== GL_RGBA
) {
4040 const GLubyte
*src
= (const GLubyte
*) source
;
4042 for (i
= 0; i
< n
; i
++) {
4043 dst
[0] = UBYTE_TO_CHAN(src
[0]);
4044 dst
[1] = UBYTE_TO_CHAN(src
[1]);
4045 dst
[2] = UBYTE_TO_CHAN(src
[2]);
4046 dst
[3] = UBYTE_TO_CHAN(src
[3]);
4053 else if (dstFormat
== GL_RGB
) {
4054 if (srcFormat
== GL_RGB
) {
4056 const GLubyte
*src
= (const GLubyte
*) source
;
4058 for (i
= 0; i
< n
; i
++) {
4059 dst
[0] = UBYTE_TO_CHAN(src
[0]);
4060 dst
[1] = UBYTE_TO_CHAN(src
[1]);
4061 dst
[2] = UBYTE_TO_CHAN(src
[2]);
4067 else if (srcFormat
== GL_RGBA
) {
4069 const GLubyte
*src
= (const GLubyte
*) source
;
4071 for (i
= 0; i
< n
; i
++) {
4072 dst
[0] = UBYTE_TO_CHAN(src
[0]);
4073 dst
[1] = UBYTE_TO_CHAN(src
[1]);
4074 dst
[2] = UBYTE_TO_CHAN(src
[2]);
4085 /* general solution begins here */
4087 GLint dstComponents
;
4088 GLint dstRedIndex
, dstGreenIndex
, dstBlueIndex
, dstAlphaIndex
;
4089 GLint dstLuminanceIndex
, dstIntensityIndex
;
4090 GLfloat rgba
[MAX_WIDTH
][4];
4092 dstComponents
= _mesa_components_in_format( dstFormat
);
4093 /* source & dest image formats should have been error checked by now */
4094 assert(dstComponents
> 0);
4097 * Extract image data and convert to RGBA floats
4099 assert(n
<= MAX_WIDTH
);
4100 if (srcFormat
== GL_COLOR_INDEX
) {
4101 GLuint indexes
[MAX_WIDTH
];
4102 extract_uint_indexes(n
, indexes
, srcFormat
, srcType
, source
,
4105 if (dstFormat
== GL_COLOR_INDEX
) {
4107 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4108 /* convert to GLchan and return */
4109 for (i
= 0; i
< n
; i
++) {
4110 dest
[i
] = (GLchan
) (indexes
[i
] & 0xff);
4115 /* Convert indexes to RGBA */
4116 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
4117 shift_and_offset_ci(ctx
, n
, indexes
);
4119 _mesa_map_ci_to_rgba(ctx
, n
, indexes
, rgba
);
4122 /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
4123 * with color indexes.
4125 transferOps
&= ~(IMAGE_SCALE_BIAS_BIT
| IMAGE_MAP_COLOR_BIT
);
4128 /* non-color index data */
4129 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
4130 srcPacking
->SwapBytes
);
4133 /* Need to clamp if returning GLubytes or GLushorts */
4134 #if CHAN_TYPE != GL_FLOAT
4135 transferOps
|= IMAGE_CLAMP_BIT
;
4139 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, n
, rgba
);
4142 /* Now determine which color channels we need to produce.
4143 * And determine the dest index (offset) within each color tuple.
4145 switch (dstFormat
) {
4148 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
4149 dstLuminanceIndex
= dstIntensityIndex
= -1;
4152 dstLuminanceIndex
= 0;
4153 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
4154 dstIntensityIndex
= -1;
4156 case GL_LUMINANCE_ALPHA
:
4157 dstLuminanceIndex
= 0;
4159 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
4160 dstIntensityIndex
= -1;
4163 dstIntensityIndex
= 0;
4164 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
4165 dstLuminanceIndex
= -1;
4169 dstGreenIndex
= dstBlueIndex
= -1;
4170 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
4176 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
4182 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
4189 dstLuminanceIndex
= dstIntensityIndex
= -1;
4192 _mesa_problem(ctx
, "bad dstFormat in _mesa_unpack_chan_span()");
4197 /* Now return the GLchan data in the requested dstFormat */
4199 if (dstRedIndex
>= 0) {
4202 for (i
= 0; i
< n
; i
++) {
4203 CLAMPED_FLOAT_TO_CHAN(dst
[dstRedIndex
], rgba
[i
][RCOMP
]);
4204 dst
+= dstComponents
;
4208 if (dstGreenIndex
>= 0) {
4211 for (i
= 0; i
< n
; i
++) {
4212 CLAMPED_FLOAT_TO_CHAN(dst
[dstGreenIndex
], rgba
[i
][GCOMP
]);
4213 dst
+= dstComponents
;
4217 if (dstBlueIndex
>= 0) {
4220 for (i
= 0; i
< n
; i
++) {
4221 CLAMPED_FLOAT_TO_CHAN(dst
[dstBlueIndex
], rgba
[i
][BCOMP
]);
4222 dst
+= dstComponents
;
4226 if (dstAlphaIndex
>= 0) {
4229 for (i
= 0; i
< n
; i
++) {
4230 CLAMPED_FLOAT_TO_CHAN(dst
[dstAlphaIndex
], rgba
[i
][ACOMP
]);
4231 dst
+= dstComponents
;
4235 if (dstIntensityIndex
>= 0) {
4238 assert(dstIntensityIndex
== 0);
4239 assert(dstComponents
== 1);
4240 for (i
= 0; i
< n
; i
++) {
4241 /* Intensity comes from red channel */
4242 CLAMPED_FLOAT_TO_CHAN(dst
[i
], rgba
[i
][RCOMP
]);
4246 if (dstLuminanceIndex
>= 0) {
4249 assert(dstLuminanceIndex
== 0);
4250 for (i
= 0; i
< n
; i
++) {
4251 /* Luminance comes from red channel */
4252 CLAMPED_FLOAT_TO_CHAN(dst
[0], rgba
[i
][RCOMP
]);
4253 dst
+= dstComponents
;
4261 * Same as _mesa_unpack_color_span_chan(), but return GLfloat data
4262 * instead of GLchan.
4265 _mesa_unpack_color_span_float( struct gl_context
*ctx
,
4266 GLuint n
, GLenum dstFormat
, GLfloat dest
[],
4267 GLenum srcFormat
, GLenum srcType
,
4268 const GLvoid
*source
,
4269 const struct gl_pixelstore_attrib
*srcPacking
,
4270 GLbitfield transferOps
)
4272 ASSERT(dstFormat
== GL_ALPHA
||
4273 dstFormat
== GL_LUMINANCE
||
4274 dstFormat
== GL_LUMINANCE_ALPHA
||
4275 dstFormat
== GL_INTENSITY
||
4276 dstFormat
== GL_RED
||
4277 dstFormat
== GL_RG
||
4278 dstFormat
== GL_RGB
||
4279 dstFormat
== GL_RGBA
||
4280 dstFormat
== GL_COLOR_INDEX
);
4282 ASSERT(srcFormat
== GL_RED
||
4283 srcFormat
== GL_GREEN
||
4284 srcFormat
== GL_BLUE
||
4285 srcFormat
== GL_ALPHA
||
4286 srcFormat
== GL_LUMINANCE
||
4287 srcFormat
== GL_LUMINANCE_ALPHA
||
4288 srcFormat
== GL_INTENSITY
||
4289 srcFormat
== GL_RG
||
4290 srcFormat
== GL_RGB
||
4291 srcFormat
== GL_BGR
||
4292 srcFormat
== GL_RGBA
||
4293 srcFormat
== GL_BGRA
||
4294 srcFormat
== GL_ABGR_EXT
||
4295 srcFormat
== GL_RED_INTEGER_EXT
||
4296 srcFormat
== GL_GREEN_INTEGER_EXT
||
4297 srcFormat
== GL_BLUE_INTEGER_EXT
||
4298 srcFormat
== GL_ALPHA_INTEGER_EXT
||
4299 srcFormat
== GL_RGB_INTEGER_EXT
||
4300 srcFormat
== GL_RGBA_INTEGER_EXT
||
4301 srcFormat
== GL_BGR_INTEGER_EXT
||
4302 srcFormat
== GL_BGRA_INTEGER_EXT
||
4303 srcFormat
== GL_LUMINANCE_INTEGER_EXT
||
4304 srcFormat
== GL_LUMINANCE_ALPHA_INTEGER_EXT
||
4305 srcFormat
== GL_COLOR_INDEX
);
4307 ASSERT(srcType
== GL_BITMAP
||
4308 srcType
== GL_UNSIGNED_BYTE
||
4309 srcType
== GL_BYTE
||
4310 srcType
== GL_UNSIGNED_SHORT
||
4311 srcType
== GL_SHORT
||
4312 srcType
== GL_UNSIGNED_INT
||
4313 srcType
== GL_INT
||
4314 srcType
== GL_HALF_FLOAT_ARB
||
4315 srcType
== GL_FLOAT
||
4316 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
4317 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
4318 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
4319 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
4320 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
4321 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
4322 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
4323 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
4324 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
4325 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
4326 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
4327 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
4329 /* general solution, no special cases, yet */
4331 GLint dstComponents
;
4332 GLint dstRedIndex
, dstGreenIndex
, dstBlueIndex
, dstAlphaIndex
;
4333 GLint dstLuminanceIndex
, dstIntensityIndex
;
4334 GLfloat rgba
[MAX_WIDTH
][4];
4336 dstComponents
= _mesa_components_in_format( dstFormat
);
4337 /* source & dest image formats should have been error checked by now */
4338 assert(dstComponents
> 0);
4341 * Extract image data and convert to RGBA floats
4343 assert(n
<= MAX_WIDTH
);
4344 if (srcFormat
== GL_COLOR_INDEX
) {
4345 GLuint indexes
[MAX_WIDTH
];
4346 extract_uint_indexes(n
, indexes
, srcFormat
, srcType
, source
,
4349 if (dstFormat
== GL_COLOR_INDEX
) {
4351 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4352 /* convert to GLchan and return */
4353 for (i
= 0; i
< n
; i
++) {
4354 dest
[i
] = (GLchan
) (indexes
[i
] & 0xff);
4359 /* Convert indexes to RGBA */
4360 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
4361 shift_and_offset_ci(ctx
, n
, indexes
);
4363 _mesa_map_ci_to_rgba(ctx
, n
, indexes
, rgba
);
4366 /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
4367 * with color indexes.
4369 transferOps
&= ~(IMAGE_SCALE_BIAS_BIT
| IMAGE_MAP_COLOR_BIT
);
4372 /* non-color index data */
4373 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
4374 srcPacking
->SwapBytes
);
4378 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, n
, rgba
);
4381 /* Now determine which color channels we need to produce.
4382 * And determine the dest index (offset) within each color tuple.
4384 switch (dstFormat
) {
4387 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
4388 dstLuminanceIndex
= dstIntensityIndex
= -1;
4391 dstLuminanceIndex
= 0;
4392 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
4393 dstIntensityIndex
= -1;
4395 case GL_LUMINANCE_ALPHA
:
4396 dstLuminanceIndex
= 0;
4398 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
4399 dstIntensityIndex
= -1;
4402 dstIntensityIndex
= 0;
4403 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
4404 dstLuminanceIndex
= -1;
4408 dstGreenIndex
= dstBlueIndex
= -1;
4409 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
4415 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
4421 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
4428 dstLuminanceIndex
= dstIntensityIndex
= -1;
4431 _mesa_problem(ctx
, "bad dstFormat in _mesa_unpack_color_span_float()");
4435 /* Now pack results in the requested dstFormat */
4436 if (dstRedIndex
>= 0) {
4437 GLfloat
*dst
= dest
;
4439 for (i
= 0; i
< n
; i
++) {
4440 dst
[dstRedIndex
] = rgba
[i
][RCOMP
];
4441 dst
+= dstComponents
;
4445 if (dstGreenIndex
>= 0) {
4446 GLfloat
*dst
= dest
;
4448 for (i
= 0; i
< n
; i
++) {
4449 dst
[dstGreenIndex
] = rgba
[i
][GCOMP
];
4450 dst
+= dstComponents
;
4454 if (dstBlueIndex
>= 0) {
4455 GLfloat
*dst
= dest
;
4457 for (i
= 0; i
< n
; i
++) {
4458 dst
[dstBlueIndex
] = rgba
[i
][BCOMP
];
4459 dst
+= dstComponents
;
4463 if (dstAlphaIndex
>= 0) {
4464 GLfloat
*dst
= dest
;
4466 for (i
= 0; i
< n
; i
++) {
4467 dst
[dstAlphaIndex
] = rgba
[i
][ACOMP
];
4468 dst
+= dstComponents
;
4472 if (dstIntensityIndex
>= 0) {
4473 GLfloat
*dst
= dest
;
4475 assert(dstIntensityIndex
== 0);
4476 assert(dstComponents
== 1);
4477 for (i
= 0; i
< n
; i
++) {
4478 /* Intensity comes from red channel */
4479 dst
[i
] = rgba
[i
][RCOMP
];
4483 if (dstLuminanceIndex
>= 0) {
4484 GLfloat
*dst
= dest
;
4486 assert(dstLuminanceIndex
== 0);
4487 for (i
= 0; i
< n
; i
++) {
4488 /* Luminance comes from red channel */
4489 dst
[0] = rgba
[i
][RCOMP
];
4490 dst
+= dstComponents
;
4497 * Similar to _mesa_unpack_color_span_float(), but for dudv data instead of rgba,
4498 * directly return GLbyte data, no transfer ops apply.
4501 _mesa_unpack_dudv_span_byte( struct gl_context
*ctx
,
4502 GLuint n
, GLenum dstFormat
, GLbyte dest
[],
4503 GLenum srcFormat
, GLenum srcType
,
4504 const GLvoid
*source
,
4505 const struct gl_pixelstore_attrib
*srcPacking
,
4506 GLbitfield transferOps
)
4508 ASSERT(dstFormat
== GL_DUDV_ATI
);
4509 ASSERT(srcFormat
== GL_DUDV_ATI
);
4511 ASSERT(srcType
== GL_UNSIGNED_BYTE
||
4512 srcType
== GL_BYTE
||
4513 srcType
== GL_UNSIGNED_SHORT
||
4514 srcType
== GL_SHORT
||
4515 srcType
== GL_UNSIGNED_INT
||
4516 srcType
== GL_INT
||
4517 srcType
== GL_HALF_FLOAT_ARB
||
4518 srcType
== GL_FLOAT
);
4520 /* general solution */
4522 GLint dstComponents
;
4523 GLfloat rgba
[MAX_WIDTH
][4];
4527 dstComponents
= _mesa_components_in_format( dstFormat
);
4528 /* source & dest image formats should have been error checked by now */
4529 assert(dstComponents
> 0);
4532 * Extract image data and convert to RGBA floats
4534 assert(n
<= MAX_WIDTH
);
4535 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
4536 srcPacking
->SwapBytes
);
4539 /* Now determine which color channels we need to produce.
4540 * And determine the dest index (offset) within each color tuple.
4543 /* Now pack results in the requested dstFormat */
4544 for (i
= 0; i
< n
; i
++) {
4545 /* not sure - need clamp[-1,1] here? */
4546 dst
[0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
4547 dst
[1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
4548 dst
+= dstComponents
;
4554 * Unpack a row of color index data from a client buffer according to
4555 * the pixel unpacking parameters.
4556 * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
4558 * Args: ctx - the context
4559 * n - number of pixels
4560 * dstType - destination data type
4561 * dest - destination array
4562 * srcType - source pixel type
4563 * source - source data pointer
4564 * srcPacking - pixel unpacking parameters
4565 * transferOps - the pixel transfer operations to apply
4568 _mesa_unpack_index_span( const struct gl_context
*ctx
, GLuint n
,
4569 GLenum dstType
, GLvoid
*dest
,
4570 GLenum srcType
, const GLvoid
*source
,
4571 const struct gl_pixelstore_attrib
*srcPacking
,
4572 GLbitfield transferOps
)
4574 ASSERT(srcType
== GL_BITMAP
||
4575 srcType
== GL_UNSIGNED_BYTE
||
4576 srcType
== GL_BYTE
||
4577 srcType
== GL_UNSIGNED_SHORT
||
4578 srcType
== GL_SHORT
||
4579 srcType
== GL_UNSIGNED_INT
||
4580 srcType
== GL_INT
||
4581 srcType
== GL_HALF_FLOAT_ARB
||
4582 srcType
== GL_FLOAT
);
4584 ASSERT(dstType
== GL_UNSIGNED_BYTE
||
4585 dstType
== GL_UNSIGNED_SHORT
||
4586 dstType
== GL_UNSIGNED_INT
);
4589 transferOps
&= (IMAGE_MAP_COLOR_BIT
| IMAGE_SHIFT_OFFSET_BIT
);
4592 * Try simple cases first
4594 if (transferOps
== 0 && srcType
== GL_UNSIGNED_BYTE
4595 && dstType
== GL_UNSIGNED_BYTE
) {
4596 memcpy(dest
, source
, n
* sizeof(GLubyte
));
4598 else if (transferOps
== 0 && srcType
== GL_UNSIGNED_INT
4599 && dstType
== GL_UNSIGNED_INT
&& !srcPacking
->SwapBytes
) {
4600 memcpy(dest
, source
, n
* sizeof(GLuint
));
4606 GLuint indexes
[MAX_WIDTH
];
4607 assert(n
<= MAX_WIDTH
);
4609 extract_uint_indexes(n
, indexes
, GL_COLOR_INDEX
, srcType
, source
,
4613 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4615 /* convert to dest type */
4617 case GL_UNSIGNED_BYTE
:
4619 GLubyte
*dst
= (GLubyte
*) dest
;
4621 for (i
= 0; i
< n
; i
++) {
4622 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
4626 case GL_UNSIGNED_SHORT
:
4628 GLuint
*dst
= (GLuint
*) dest
;
4630 for (i
= 0; i
< n
; i
++) {
4631 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
4635 case GL_UNSIGNED_INT
:
4636 memcpy(dest
, indexes
, n
* sizeof(GLuint
));
4639 _mesa_problem(ctx
, "bad dstType in _mesa_unpack_index_span");
4646 _mesa_pack_index_span( const struct gl_context
*ctx
, GLuint n
,
4647 GLenum dstType
, GLvoid
*dest
, const GLuint
*source
,
4648 const struct gl_pixelstore_attrib
*dstPacking
,
4649 GLbitfield transferOps
)
4651 GLuint indexes
[MAX_WIDTH
];
4653 ASSERT(n
<= MAX_WIDTH
);
4655 transferOps
&= (IMAGE_MAP_COLOR_BIT
| IMAGE_SHIFT_OFFSET_BIT
);
4657 if (transferOps
& (IMAGE_MAP_COLOR_BIT
| IMAGE_SHIFT_OFFSET_BIT
)) {
4658 /* make a copy of input */
4659 memcpy(indexes
, source
, n
* sizeof(GLuint
));
4660 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4665 case GL_UNSIGNED_BYTE
:
4667 GLubyte
*dst
= (GLubyte
*) dest
;
4669 for (i
= 0; i
< n
; i
++) {
4670 *dst
++ = (GLubyte
) source
[i
];
4676 GLbyte
*dst
= (GLbyte
*) dest
;
4678 for (i
= 0; i
< n
; i
++) {
4679 dst
[i
] = (GLbyte
) source
[i
];
4683 case GL_UNSIGNED_SHORT
:
4685 GLushort
*dst
= (GLushort
*) dest
;
4687 for (i
= 0; i
< n
; i
++) {
4688 dst
[i
] = (GLushort
) source
[i
];
4690 if (dstPacking
->SwapBytes
) {
4691 _mesa_swap2( (GLushort
*) dst
, n
);
4697 GLshort
*dst
= (GLshort
*) dest
;
4699 for (i
= 0; i
< n
; i
++) {
4700 dst
[i
] = (GLshort
) source
[i
];
4702 if (dstPacking
->SwapBytes
) {
4703 _mesa_swap2( (GLushort
*) dst
, n
);
4707 case GL_UNSIGNED_INT
:
4709 GLuint
*dst
= (GLuint
*) dest
;
4711 for (i
= 0; i
< n
; i
++) {
4712 dst
[i
] = (GLuint
) source
[i
];
4714 if (dstPacking
->SwapBytes
) {
4715 _mesa_swap4( (GLuint
*) dst
, n
);
4721 GLint
*dst
= (GLint
*) dest
;
4723 for (i
= 0; i
< n
; i
++) {
4724 dst
[i
] = (GLint
) source
[i
];
4726 if (dstPacking
->SwapBytes
) {
4727 _mesa_swap4( (GLuint
*) dst
, n
);
4733 GLfloat
*dst
= (GLfloat
*) dest
;
4735 for (i
= 0; i
< n
; i
++) {
4736 dst
[i
] = (GLfloat
) source
[i
];
4738 if (dstPacking
->SwapBytes
) {
4739 _mesa_swap4( (GLuint
*) dst
, n
);
4743 case GL_HALF_FLOAT_ARB
:
4745 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
4747 for (i
= 0; i
< n
; i
++) {
4748 dst
[i
] = _mesa_float_to_half((GLfloat
) source
[i
]);
4750 if (dstPacking
->SwapBytes
) {
4751 _mesa_swap2( (GLushort
*) dst
, n
);
4756 _mesa_problem(ctx
, "bad type in _mesa_pack_index_span");
4762 * Unpack a row of stencil data from a client buffer according to
4763 * the pixel unpacking parameters.
4764 * This is (or will be) used by glDrawPixels
4766 * Args: ctx - the context
4767 * n - number of pixels
4768 * dstType - destination data type
4769 * dest - destination array
4770 * srcType - source pixel type
4771 * source - source data pointer
4772 * srcPacking - pixel unpacking parameters
4773 * transferOps - apply offset/bias/lookup ops?
4776 _mesa_unpack_stencil_span( const struct gl_context
*ctx
, GLuint n
,
4777 GLenum dstType
, GLvoid
*dest
,
4778 GLenum srcType
, const GLvoid
*source
,
4779 const struct gl_pixelstore_attrib
*srcPacking
,
4780 GLbitfield transferOps
)
4782 ASSERT(srcType
== GL_BITMAP
||
4783 srcType
== GL_UNSIGNED_BYTE
||
4784 srcType
== GL_BYTE
||
4785 srcType
== GL_UNSIGNED_SHORT
||
4786 srcType
== GL_SHORT
||
4787 srcType
== GL_UNSIGNED_INT
||
4788 srcType
== GL_INT
||
4789 srcType
== GL_UNSIGNED_INT_24_8_EXT
||
4790 srcType
== GL_HALF_FLOAT_ARB
||
4791 srcType
== GL_FLOAT
);
4793 ASSERT(dstType
== GL_UNSIGNED_BYTE
||
4794 dstType
== GL_UNSIGNED_SHORT
||
4795 dstType
== GL_UNSIGNED_INT
);
4797 /* only shift and offset apply to stencil */
4798 transferOps
&= IMAGE_SHIFT_OFFSET_BIT
;
4801 * Try simple cases first
4803 if (transferOps
== 0 &&
4804 !ctx
->Pixel
.MapStencilFlag
&&
4805 srcType
== GL_UNSIGNED_BYTE
&&
4806 dstType
== GL_UNSIGNED_BYTE
) {
4807 memcpy(dest
, source
, n
* sizeof(GLubyte
));
4809 else if (transferOps
== 0 &&
4810 !ctx
->Pixel
.MapStencilFlag
&&
4811 srcType
== GL_UNSIGNED_INT
&&
4812 dstType
== GL_UNSIGNED_INT
&&
4813 !srcPacking
->SwapBytes
) {
4814 memcpy(dest
, source
, n
* sizeof(GLuint
));
4820 GLuint indexes
[MAX_WIDTH
];
4821 assert(n
<= MAX_WIDTH
);
4823 extract_uint_indexes(n
, indexes
, GL_STENCIL_INDEX
, srcType
, source
,
4826 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
4827 /* shift and offset indexes */
4828 shift_and_offset_ci(ctx
, n
, indexes
);
4831 if (ctx
->Pixel
.MapStencilFlag
) {
4832 /* Apply stencil lookup table */
4833 const GLuint mask
= ctx
->PixelMaps
.StoS
.Size
- 1;
4835 for (i
= 0; i
< n
; i
++) {
4836 indexes
[i
] = (GLuint
)ctx
->PixelMaps
.StoS
.Map
[ indexes
[i
] & mask
];
4840 /* convert to dest type */
4842 case GL_UNSIGNED_BYTE
:
4844 GLubyte
*dst
= (GLubyte
*) dest
;
4846 for (i
= 0; i
< n
; i
++) {
4847 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
4851 case GL_UNSIGNED_SHORT
:
4853 GLuint
*dst
= (GLuint
*) dest
;
4855 for (i
= 0; i
< n
; i
++) {
4856 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
4860 case GL_UNSIGNED_INT
:
4861 memcpy(dest
, indexes
, n
* sizeof(GLuint
));
4864 _mesa_problem(ctx
, "bad dstType in _mesa_unpack_stencil_span");
4871 _mesa_pack_stencil_span( const struct gl_context
*ctx
, GLuint n
,
4872 GLenum dstType
, GLvoid
*dest
, const GLstencil
*source
,
4873 const struct gl_pixelstore_attrib
*dstPacking
)
4875 GLstencil stencil
[MAX_WIDTH
];
4877 ASSERT(n
<= MAX_WIDTH
);
4879 if (ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
||
4880 ctx
->Pixel
.MapStencilFlag
) {
4881 /* make a copy of input */
4882 memcpy(stencil
, source
, n
* sizeof(GLstencil
));
4883 _mesa_apply_stencil_transfer_ops(ctx
, n
, stencil
);
4888 case GL_UNSIGNED_BYTE
:
4889 if (sizeof(GLstencil
) == 1) {
4890 memcpy( dest
, source
, n
);
4893 GLubyte
*dst
= (GLubyte
*) dest
;
4896 dst
[i
] = (GLubyte
) source
[i
];
4902 GLbyte
*dst
= (GLbyte
*) dest
;
4905 dst
[i
] = (GLbyte
) (source
[i
] & 0x7f);
4909 case GL_UNSIGNED_SHORT
:
4911 GLushort
*dst
= (GLushort
*) dest
;
4914 dst
[i
] = (GLushort
) source
[i
];
4916 if (dstPacking
->SwapBytes
) {
4917 _mesa_swap2( (GLushort
*) dst
, n
);
4923 GLshort
*dst
= (GLshort
*) dest
;
4926 dst
[i
] = (GLshort
) source
[i
];
4928 if (dstPacking
->SwapBytes
) {
4929 _mesa_swap2( (GLushort
*) dst
, n
);
4933 case GL_UNSIGNED_INT
:
4935 GLuint
*dst
= (GLuint
*) dest
;
4938 dst
[i
] = (GLuint
) source
[i
];
4940 if (dstPacking
->SwapBytes
) {
4941 _mesa_swap4( (GLuint
*) dst
, n
);
4947 GLint
*dst
= (GLint
*) dest
;
4950 dst
[i
] = (GLint
) source
[i
];
4952 if (dstPacking
->SwapBytes
) {
4953 _mesa_swap4( (GLuint
*) dst
, n
);
4959 GLfloat
*dst
= (GLfloat
*) dest
;
4962 dst
[i
] = (GLfloat
) source
[i
];
4964 if (dstPacking
->SwapBytes
) {
4965 _mesa_swap4( (GLuint
*) dst
, n
);
4969 case GL_HALF_FLOAT_ARB
:
4971 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
4974 dst
[i
] = _mesa_float_to_half( (float) source
[i
] );
4976 if (dstPacking
->SwapBytes
) {
4977 _mesa_swap2( (GLushort
*) dst
, n
);
4982 if (dstPacking
->LsbFirst
) {
4983 GLubyte
*dst
= (GLubyte
*) dest
;
4986 for (i
= 0; i
< n
; i
++) {
4989 *dst
|= ((source
[i
] != 0) << shift
);
4998 GLubyte
*dst
= (GLubyte
*) dest
;
5001 for (i
= 0; i
< n
; i
++) {
5004 *dst
|= ((source
[i
] != 0) << shift
);
5014 _mesa_problem(ctx
, "bad type in _mesa_pack_index_span");
5018 #define DEPTH_VALUES(GLTYPE, GLTYPE2FLOAT) \
5021 const GLTYPE *src = (const GLTYPE *)source; \
5022 for (i = 0; i < n; i++) { \
5023 GLTYPE value = src[i]; \
5024 if (srcPacking->SwapBytes) { \
5025 if (sizeof(GLTYPE) == 2) { \
5027 } else if (sizeof(GLTYPE) == 4) { \
5031 depthValues[i] = GLTYPE2FLOAT(value); \
5037 * Unpack a row of depth/z values from memory, returning GLushort, GLuint
5038 * or GLfloat values.
5039 * The glPixelTransfer (scale/bias) params will be applied.
5041 * \param dstType one of GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, GL_FLOAT
5042 * \param depthMax max value for returned GLushort or GLuint values
5043 * (ignored for GLfloat).
5046 _mesa_unpack_depth_span( const struct gl_context
*ctx
, GLuint n
,
5047 GLenum dstType
, GLvoid
*dest
, GLuint depthMax
,
5048 GLenum srcType
, const GLvoid
*source
,
5049 const struct gl_pixelstore_attrib
*srcPacking
)
5051 GLfloat depthTemp
[MAX_WIDTH
], *depthValues
;
5052 GLboolean needClamp
= GL_FALSE
;
5054 /* Look for special cases first.
5055 * Not only are these faster, they're less prone to numeric conversion
5056 * problems. Otherwise, converting from an int type to a float then
5057 * back to an int type can introduce errors that will show up as
5058 * artifacts in things like depth peeling which uses glCopyTexImage.
5060 if (ctx
->Pixel
.DepthScale
== 1.0 && ctx
->Pixel
.DepthBias
== 0.0) {
5061 if (srcType
== GL_UNSIGNED_INT
&& dstType
== GL_UNSIGNED_SHORT
) {
5062 const GLuint
*src
= (const GLuint
*) source
;
5063 GLushort
*dst
= (GLushort
*) dest
;
5065 for (i
= 0; i
< n
; i
++) {
5066 dst
[i
] = src
[i
] >> 16;
5070 if (srcType
== GL_UNSIGNED_SHORT
5071 && dstType
== GL_UNSIGNED_INT
5072 && depthMax
== 0xffffffff) {
5073 const GLushort
*src
= (const GLushort
*) source
;
5074 GLuint
*dst
= (GLuint
*) dest
;
5076 for (i
= 0; i
< n
; i
++) {
5077 dst
[i
] = src
[i
] | (src
[i
] << 16);
5081 if (srcType
== GL_UNSIGNED_INT_24_8
5082 && dstType
== GL_UNSIGNED_INT
5083 && depthMax
== 0xffffff) {
5084 const GLuint
*src
= (const GLuint
*) source
;
5085 GLuint
*dst
= (GLuint
*) dest
;
5087 for (i
= 0; i
< n
; i
++) {
5088 dst
[i
] = src
[i
] >> 8;
5092 /* XXX may want to add additional cases here someday */
5095 /* general case path follows */
5097 if (dstType
== GL_FLOAT
) {
5098 depthValues
= (GLfloat
*) dest
;
5101 depthValues
= depthTemp
;
5104 /* Convert incoming values to GLfloat. Some conversions will require
5109 DEPTH_VALUES(GLbyte
, BYTE_TO_FLOAT
);
5110 needClamp
= GL_TRUE
;
5112 case GL_UNSIGNED_BYTE
:
5113 DEPTH_VALUES(GLubyte
, UBYTE_TO_FLOAT
);
5116 DEPTH_VALUES(GLshort
, SHORT_TO_FLOAT
);
5117 needClamp
= GL_TRUE
;
5119 case GL_UNSIGNED_SHORT
:
5120 DEPTH_VALUES(GLushort
, USHORT_TO_FLOAT
);
5123 DEPTH_VALUES(GLint
, INT_TO_FLOAT
);
5124 needClamp
= GL_TRUE
;
5126 case GL_UNSIGNED_INT
:
5127 DEPTH_VALUES(GLuint
, UINT_TO_FLOAT
);
5129 case GL_UNSIGNED_INT_24_8_EXT
: /* GL_EXT_packed_depth_stencil */
5130 if (dstType
== GL_UNSIGNED_INT_24_8_EXT
&&
5131 depthMax
== 0xffffff &&
5132 ctx
->Pixel
.DepthScale
== 1.0 &&
5133 ctx
->Pixel
.DepthBias
== 0.0) {
5134 const GLuint
*src
= (const GLuint
*) source
;
5135 GLuint
*zValues
= (GLuint
*) dest
;
5137 for (i
= 0; i
< n
; i
++) {
5138 GLuint value
= src
[i
];
5139 if (srcPacking
->SwapBytes
) {
5142 zValues
[i
] = value
& 0xffffff00;
5147 const GLuint
*src
= (const GLuint
*) source
;
5148 const GLfloat scale
= 1.0f
/ 0xffffff;
5150 for (i
= 0; i
< n
; i
++) {
5151 GLuint value
= src
[i
];
5152 if (srcPacking
->SwapBytes
) {
5155 depthValues
[i
] = (value
>> 8) * scale
;
5160 DEPTH_VALUES(GLfloat
, 1*);
5161 needClamp
= GL_TRUE
;
5163 case GL_HALF_FLOAT_ARB
:
5166 const GLhalfARB
*src
= (const GLhalfARB
*) source
;
5167 for (i
= 0; i
< n
; i
++) {
5168 GLhalfARB value
= src
[i
];
5169 if (srcPacking
->SwapBytes
) {
5172 depthValues
[i
] = _mesa_half_to_float(value
);
5174 needClamp
= GL_TRUE
;
5178 _mesa_problem(NULL
, "bad type in _mesa_unpack_depth_span()");
5182 /* apply depth scale and bias */
5184 const GLfloat scale
= ctx
->Pixel
.DepthScale
;
5185 const GLfloat bias
= ctx
->Pixel
.DepthBias
;
5186 if (scale
!= 1.0 || bias
!= 0.0) {
5188 for (i
= 0; i
< n
; i
++) {
5189 depthValues
[i
] = depthValues
[i
] * scale
+ bias
;
5191 needClamp
= GL_TRUE
;
5195 /* clamp to [0, 1] */
5198 for (i
= 0; i
< n
; i
++) {
5199 depthValues
[i
] = (GLfloat
)CLAMP(depthValues
[i
], 0.0, 1.0);
5204 * Convert values to dstType
5206 if (dstType
== GL_UNSIGNED_INT
) {
5207 GLuint
*zValues
= (GLuint
*) dest
;
5209 if (depthMax
<= 0xffffff) {
5210 /* no overflow worries */
5211 for (i
= 0; i
< n
; i
++) {
5212 zValues
[i
] = (GLuint
) (depthValues
[i
] * (GLfloat
) depthMax
);
5216 /* need to use double precision to prevent overflow problems */
5217 for (i
= 0; i
< n
; i
++) {
5218 GLdouble z
= depthValues
[i
] * (GLfloat
) depthMax
;
5219 if (z
>= (GLdouble
) 0xffffffff)
5220 zValues
[i
] = 0xffffffff;
5222 zValues
[i
] = (GLuint
) z
;
5226 else if (dstType
== GL_UNSIGNED_SHORT
) {
5227 GLushort
*zValues
= (GLushort
*) dest
;
5229 ASSERT(depthMax
<= 0xffff);
5230 for (i
= 0; i
< n
; i
++) {
5231 zValues
[i
] = (GLushort
) (depthValues
[i
] * (GLfloat
) depthMax
);
5235 ASSERT(dstType
== GL_FLOAT
);
5236 /*ASSERT(depthMax == 1.0F);*/
5242 * Pack an array of depth values. The values are floats in [0,1].
5245 _mesa_pack_depth_span( const struct gl_context
*ctx
, GLuint n
, GLvoid
*dest
,
5246 GLenum dstType
, const GLfloat
*depthSpan
,
5247 const struct gl_pixelstore_attrib
*dstPacking
)
5249 GLfloat depthCopy
[MAX_WIDTH
];
5251 ASSERT(n
<= MAX_WIDTH
);
5253 if (ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0) {
5254 memcpy(depthCopy
, depthSpan
, n
* sizeof(GLfloat
));
5255 _mesa_scale_and_bias_depth(ctx
, n
, depthCopy
);
5256 depthSpan
= depthCopy
;
5260 case GL_UNSIGNED_BYTE
:
5262 GLubyte
*dst
= (GLubyte
*) dest
;
5264 for (i
= 0; i
< n
; i
++) {
5265 dst
[i
] = FLOAT_TO_UBYTE( depthSpan
[i
] );
5271 GLbyte
*dst
= (GLbyte
*) dest
;
5273 for (i
= 0; i
< n
; i
++) {
5274 dst
[i
] = FLOAT_TO_BYTE( depthSpan
[i
] );
5278 case GL_UNSIGNED_SHORT
:
5280 GLushort
*dst
= (GLushort
*) dest
;
5282 for (i
= 0; i
< n
; i
++) {
5283 CLAMPED_FLOAT_TO_USHORT(dst
[i
], depthSpan
[i
]);
5285 if (dstPacking
->SwapBytes
) {
5286 _mesa_swap2( (GLushort
*) dst
, n
);
5292 GLshort
*dst
= (GLshort
*) dest
;
5294 for (i
= 0; i
< n
; i
++) {
5295 dst
[i
] = FLOAT_TO_SHORT( depthSpan
[i
] );
5297 if (dstPacking
->SwapBytes
) {
5298 _mesa_swap2( (GLushort
*) dst
, n
);
5302 case GL_UNSIGNED_INT
:
5304 GLuint
*dst
= (GLuint
*) dest
;
5306 for (i
= 0; i
< n
; i
++) {
5307 dst
[i
] = FLOAT_TO_UINT( depthSpan
[i
] );
5309 if (dstPacking
->SwapBytes
) {
5310 _mesa_swap4( (GLuint
*) dst
, n
);
5316 GLint
*dst
= (GLint
*) dest
;
5318 for (i
= 0; i
< n
; i
++) {
5319 dst
[i
] = FLOAT_TO_INT( depthSpan
[i
] );
5321 if (dstPacking
->SwapBytes
) {
5322 _mesa_swap4( (GLuint
*) dst
, n
);
5328 GLfloat
*dst
= (GLfloat
*) dest
;
5330 for (i
= 0; i
< n
; i
++) {
5331 dst
[i
] = depthSpan
[i
];
5333 if (dstPacking
->SwapBytes
) {
5334 _mesa_swap4( (GLuint
*) dst
, n
);
5338 case GL_HALF_FLOAT_ARB
:
5340 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
5342 for (i
= 0; i
< n
; i
++) {
5343 dst
[i
] = _mesa_float_to_half(depthSpan
[i
]);
5345 if (dstPacking
->SwapBytes
) {
5346 _mesa_swap2( (GLushort
*) dst
, n
);
5351 _mesa_problem(ctx
, "bad type in _mesa_pack_depth_span");
5358 * Pack depth and stencil values as GL_DEPTH_STENCIL/GL_UNSIGNED_INT_24_8.
5361 _mesa_pack_depth_stencil_span(const struct gl_context
*ctx
, GLuint n
, GLuint
*dest
,
5362 const GLfloat
*depthVals
,
5363 const GLstencil
*stencilVals
,
5364 const struct gl_pixelstore_attrib
*dstPacking
)
5366 GLfloat depthCopy
[MAX_WIDTH
];
5367 GLstencil stencilCopy
[MAX_WIDTH
];
5370 ASSERT(n
<= MAX_WIDTH
);
5372 if (ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0) {
5373 memcpy(depthCopy
, depthVals
, n
* sizeof(GLfloat
));
5374 _mesa_scale_and_bias_depth(ctx
, n
, depthCopy
);
5375 depthVals
= depthCopy
;
5378 if (ctx
->Pixel
.IndexShift
||
5379 ctx
->Pixel
.IndexOffset
||
5380 ctx
->Pixel
.MapStencilFlag
) {
5381 memcpy(stencilCopy
, stencilVals
, n
* sizeof(GLstencil
));
5382 _mesa_apply_stencil_transfer_ops(ctx
, n
, stencilCopy
);
5383 stencilVals
= stencilCopy
;
5386 for (i
= 0; i
< n
; i
++) {
5387 GLuint z
= (GLuint
) (depthVals
[i
] * 0xffffff);
5388 dest
[i
] = (z
<< 8) | (stencilVals
[i
] & 0xff);
5391 if (dstPacking
->SwapBytes
) {
5392 _mesa_swap4(dest
, n
);
5400 * Unpack image data. Apply byte swapping, byte flipping (bitmap).
5401 * Return all image data in a contiguous block. This is used when we
5402 * compile glDrawPixels, glTexImage, etc into a display list. We
5403 * need a copy of the data in a standard format.
5406 _mesa_unpack_image( GLuint dimensions
,
5407 GLsizei width
, GLsizei height
, GLsizei depth
,
5408 GLenum format
, GLenum type
, const GLvoid
*pixels
,
5409 const struct gl_pixelstore_attrib
*unpack
)
5411 GLint bytesPerRow
, compsPerRow
;
5412 GLboolean flipBytes
, swap2
, swap4
;
5415 return NULL
; /* not necessarily an error */
5417 if (width
<= 0 || height
<= 0 || depth
<= 0)
5418 return NULL
; /* generate error later */
5420 if (type
== GL_BITMAP
) {
5421 bytesPerRow
= (width
+ 7) >> 3;
5422 flipBytes
= unpack
->LsbFirst
;
5423 swap2
= swap4
= GL_FALSE
;
5427 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
5428 GLint components
= _mesa_components_in_format(format
);
5431 if (_mesa_type_is_packed(type
))
5434 if (bytesPerPixel
<= 0 || components
<= 0)
5435 return NULL
; /* bad format or type. generate error later */
5436 bytesPerRow
= bytesPerPixel
* width
;
5437 bytesPerComp
= bytesPerPixel
/ components
;
5438 flipBytes
= GL_FALSE
;
5439 swap2
= (bytesPerComp
== 2) && unpack
->SwapBytes
;
5440 swap4
= (bytesPerComp
== 4) && unpack
->SwapBytes
;
5441 compsPerRow
= components
* width
;
5442 assert(compsPerRow
>= width
);
5447 = (GLubyte
*) malloc(bytesPerRow
* height
* depth
);
5451 return NULL
; /* generate GL_OUT_OF_MEMORY later */
5454 for (img
= 0; img
< depth
; img
++) {
5455 for (row
= 0; row
< height
; row
++) {
5456 const GLvoid
*src
= _mesa_image_address(dimensions
, unpack
, pixels
,
5457 width
, height
, format
, type
, img
, row
, 0);
5459 if ((type
== GL_BITMAP
) && (unpack
->SkipPixels
& 0x7)) {
5461 flipBytes
= GL_FALSE
;
5462 if (unpack
->LsbFirst
) {
5463 GLubyte srcMask
= 1 << (unpack
->SkipPixels
& 0x7);
5464 GLubyte dstMask
= 128;
5465 const GLubyte
*s
= src
;
5468 for (i
= 0; i
< width
; i
++) {
5472 if (srcMask
== 128) {
5477 srcMask
= srcMask
<< 1;
5485 dstMask
= dstMask
>> 1;
5490 GLubyte srcMask
= 128 >> (unpack
->SkipPixels
& 0x7);
5491 GLubyte dstMask
= 128;
5492 const GLubyte
*s
= src
;
5495 for (i
= 0; i
< width
; i
++) {
5504 srcMask
= srcMask
>> 1;
5512 dstMask
= dstMask
>> 1;
5518 memcpy(dst
, src
, bytesPerRow
);
5521 /* byte flipping/swapping */
5523 flip_bytes((GLubyte
*) dst
, bytesPerRow
);
5526 _mesa_swap2((GLushort
*) dst
, compsPerRow
);
5529 _mesa_swap4((GLuint
*) dst
, compsPerRow
);
5538 #endif /* _HAVE_FULL_GL */
5543 * Convert an array of RGBA colors from one datatype to another.
5544 * NOTE: src may equal dst. In that case, we use a temporary buffer.
5547 _mesa_convert_colors(GLenum srcType
, const GLvoid
*src
,
5548 GLenum dstType
, GLvoid
*dst
,
5549 GLuint count
, const GLubyte mask
[])
5551 GLuint tempBuffer
[MAX_WIDTH
][4];
5552 const GLboolean useTemp
= (src
== dst
);
5554 ASSERT(srcType
!= dstType
);
5557 case GL_UNSIGNED_BYTE
:
5558 if (dstType
== GL_UNSIGNED_SHORT
) {
5559 const GLubyte (*src1
)[4] = (const GLubyte (*)[4]) src
;
5560 GLushort (*dst2
)[4] = (GLushort (*)[4]) (useTemp
? tempBuffer
: dst
);
5562 for (i
= 0; i
< count
; i
++) {
5563 if (!mask
|| mask
[i
]) {
5564 dst2
[i
][RCOMP
] = UBYTE_TO_USHORT(src1
[i
][RCOMP
]);
5565 dst2
[i
][GCOMP
] = UBYTE_TO_USHORT(src1
[i
][GCOMP
]);
5566 dst2
[i
][BCOMP
] = UBYTE_TO_USHORT(src1
[i
][BCOMP
]);
5567 dst2
[i
][ACOMP
] = UBYTE_TO_USHORT(src1
[i
][ACOMP
]);
5571 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLushort
));
5574 const GLubyte (*src1
)[4] = (const GLubyte (*)[4]) src
;
5575 GLfloat (*dst4
)[4] = (GLfloat (*)[4]) (useTemp
? tempBuffer
: dst
);
5577 ASSERT(dstType
== GL_FLOAT
);
5578 for (i
= 0; i
< count
; i
++) {
5579 if (!mask
|| mask
[i
]) {
5580 dst4
[i
][RCOMP
] = UBYTE_TO_FLOAT(src1
[i
][RCOMP
]);
5581 dst4
[i
][GCOMP
] = UBYTE_TO_FLOAT(src1
[i
][GCOMP
]);
5582 dst4
[i
][BCOMP
] = UBYTE_TO_FLOAT(src1
[i
][BCOMP
]);
5583 dst4
[i
][ACOMP
] = UBYTE_TO_FLOAT(src1
[i
][ACOMP
]);
5587 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLfloat
));
5590 case GL_UNSIGNED_SHORT
:
5591 if (dstType
== GL_UNSIGNED_BYTE
) {
5592 const GLushort (*src2
)[4] = (const GLushort (*)[4]) src
;
5593 GLubyte (*dst1
)[4] = (GLubyte (*)[4]) (useTemp
? tempBuffer
: dst
);
5595 for (i
= 0; i
< count
; i
++) {
5596 if (!mask
|| mask
[i
]) {
5597 dst1
[i
][RCOMP
] = USHORT_TO_UBYTE(src2
[i
][RCOMP
]);
5598 dst1
[i
][GCOMP
] = USHORT_TO_UBYTE(src2
[i
][GCOMP
]);
5599 dst1
[i
][BCOMP
] = USHORT_TO_UBYTE(src2
[i
][BCOMP
]);
5600 dst1
[i
][ACOMP
] = USHORT_TO_UBYTE(src2
[i
][ACOMP
]);
5604 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLubyte
));
5607 const GLushort (*src2
)[4] = (const GLushort (*)[4]) src
;
5608 GLfloat (*dst4
)[4] = (GLfloat (*)[4]) (useTemp
? tempBuffer
: dst
);
5610 ASSERT(dstType
== GL_FLOAT
);
5611 for (i
= 0; i
< count
; i
++) {
5612 if (!mask
|| mask
[i
]) {
5613 dst4
[i
][RCOMP
] = USHORT_TO_FLOAT(src2
[i
][RCOMP
]);
5614 dst4
[i
][GCOMP
] = USHORT_TO_FLOAT(src2
[i
][GCOMP
]);
5615 dst4
[i
][BCOMP
] = USHORT_TO_FLOAT(src2
[i
][BCOMP
]);
5616 dst4
[i
][ACOMP
] = USHORT_TO_FLOAT(src2
[i
][ACOMP
]);
5620 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLfloat
));
5624 if (dstType
== GL_UNSIGNED_BYTE
) {
5625 const GLfloat (*src4
)[4] = (const GLfloat (*)[4]) src
;
5626 GLubyte (*dst1
)[4] = (GLubyte (*)[4]) (useTemp
? tempBuffer
: dst
);
5628 for (i
= 0; i
< count
; i
++) {
5629 if (!mask
|| mask
[i
]) {
5630 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][RCOMP
], src4
[i
][RCOMP
]);
5631 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][GCOMP
], src4
[i
][GCOMP
]);
5632 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][BCOMP
], src4
[i
][BCOMP
]);
5633 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][ACOMP
], src4
[i
][ACOMP
]);
5637 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLubyte
));
5640 const GLfloat (*src4
)[4] = (const GLfloat (*)[4]) src
;
5641 GLushort (*dst2
)[4] = (GLushort (*)[4]) (useTemp
? tempBuffer
: dst
);
5643 ASSERT(dstType
== GL_UNSIGNED_SHORT
);
5644 for (i
= 0; i
< count
; i
++) {
5645 if (!mask
|| mask
[i
]) {
5646 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][RCOMP
], src4
[i
][RCOMP
]);
5647 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][GCOMP
], src4
[i
][GCOMP
]);
5648 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][BCOMP
], src4
[i
][BCOMP
]);
5649 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][ACOMP
], src4
[i
][ACOMP
]);
5653 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLushort
));
5657 _mesa_problem(NULL
, "Invalid datatype in _mesa_convert_colors");
5665 * Perform basic clipping for glDrawPixels. The image's position and size
5666 * and the unpack SkipPixels and SkipRows are adjusted so that the image
5667 * region is entirely within the window and scissor bounds.
5668 * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).
5669 * If Pixel.ZoomY is -1, *destY will be changed to be the first row which
5670 * we'll actually write. Beforehand, *destY-1 is the first drawing row.
5672 * \return GL_TRUE if image is ready for drawing or
5673 * GL_FALSE if image was completely clipped away (draw nothing)
5676 _mesa_clip_drawpixels(const struct gl_context
*ctx
,
5677 GLint
*destX
, GLint
*destY
,
5678 GLsizei
*width
, GLsizei
*height
,
5679 struct gl_pixelstore_attrib
*unpack
)
5681 const struct gl_framebuffer
*buffer
= ctx
->DrawBuffer
;
5683 if (unpack
->RowLength
== 0) {
5684 unpack
->RowLength
= *width
;
5687 ASSERT(ctx
->Pixel
.ZoomX
== 1.0F
);
5688 ASSERT(ctx
->Pixel
.ZoomY
== 1.0F
|| ctx
->Pixel
.ZoomY
== -1.0F
);
5691 if (*destX
< buffer
->_Xmin
) {
5692 unpack
->SkipPixels
+= (buffer
->_Xmin
- *destX
);
5693 *width
-= (buffer
->_Xmin
- *destX
);
5694 *destX
= buffer
->_Xmin
;
5696 /* right clipping */
5697 if (*destX
+ *width
> buffer
->_Xmax
)
5698 *width
-= (*destX
+ *width
- buffer
->_Xmax
);
5703 if (ctx
->Pixel
.ZoomY
== 1.0F
) {
5704 /* bottom clipping */
5705 if (*destY
< buffer
->_Ymin
) {
5706 unpack
->SkipRows
+= (buffer
->_Ymin
- *destY
);
5707 *height
-= (buffer
->_Ymin
- *destY
);
5708 *destY
= buffer
->_Ymin
;
5711 if (*destY
+ *height
> buffer
->_Ymax
)
5712 *height
-= (*destY
+ *height
- buffer
->_Ymax
);
5714 else { /* upside down */
5716 if (*destY
> buffer
->_Ymax
) {
5717 unpack
->SkipRows
+= (*destY
- buffer
->_Ymax
);
5718 *height
-= (*destY
- buffer
->_Ymax
);
5719 *destY
= buffer
->_Ymax
;
5721 /* bottom clipping */
5722 if (*destY
- *height
< buffer
->_Ymin
)
5723 *height
-= (buffer
->_Ymin
- (*destY
- *height
));
5724 /* adjust destY so it's the first row to write to */
5736 * Perform clipping for glReadPixels. The image's window position
5737 * and size, and the pack skipPixels, skipRows and rowLength are adjusted
5738 * so that the image region is entirely within the window bounds.
5739 * Note: this is different from _mesa_clip_drawpixels() in that the
5740 * scissor box is ignored, and we use the bounds of the current readbuffer
5743 * \return GL_TRUE if image is ready for drawing or
5744 * GL_FALSE if image was completely clipped away (draw nothing)
5747 _mesa_clip_readpixels(const struct gl_context
*ctx
,
5748 GLint
*srcX
, GLint
*srcY
,
5749 GLsizei
*width
, GLsizei
*height
,
5750 struct gl_pixelstore_attrib
*pack
)
5752 const struct gl_framebuffer
*buffer
= ctx
->ReadBuffer
;
5754 if (pack
->RowLength
== 0) {
5755 pack
->RowLength
= *width
;
5760 pack
->SkipPixels
+= (0 - *srcX
);
5761 *width
-= (0 - *srcX
);
5764 /* right clipping */
5765 if (*srcX
+ *width
> (GLsizei
) buffer
->Width
)
5766 *width
-= (*srcX
+ *width
- buffer
->Width
);
5771 /* bottom clipping */
5773 pack
->SkipRows
+= (0 - *srcY
);
5774 *height
-= (0 - *srcY
);
5778 if (*srcY
+ *height
> (GLsizei
) buffer
->Height
)
5779 *height
-= (*srcY
+ *height
- buffer
->Height
);
5789 * Do clipping for a glCopyTexSubImage call.
5790 * The framebuffer source region might extend outside the framebuffer
5791 * bounds. Clip the source region against the framebuffer bounds and
5792 * adjust the texture/dest position and size accordingly.
5794 * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise.
5797 _mesa_clip_copytexsubimage(const struct gl_context
*ctx
,
5798 GLint
*destX
, GLint
*destY
,
5799 GLint
*srcX
, GLint
*srcY
,
5800 GLsizei
*width
, GLsizei
*height
)
5802 const struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
5803 const GLint srcX0
= *srcX
, srcY0
= *srcY
;
5805 if (_mesa_clip_to_region(0, 0, fb
->Width
, fb
->Height
,
5806 srcX
, srcY
, width
, height
)) {
5807 *destX
= *destX
+ *srcX
- srcX0
;
5808 *destY
= *destY
+ *srcY
- srcY0
;
5820 * Clip the rectangle defined by (x, y, width, height) against the bounds
5821 * specified by [xmin, xmax) and [ymin, ymax).
5822 * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.
5825 _mesa_clip_to_region(GLint xmin
, GLint ymin
,
5826 GLint xmax
, GLint ymax
,
5828 GLsizei
*width
, GLsizei
*height
)
5832 *width
-= (xmin
- *x
);
5836 /* right clipping */
5837 if (*x
+ *width
> xmax
)
5838 *width
-= (*x
+ *width
- xmax
);
5843 /* bottom (or top) clipping */
5845 *height
-= (ymin
- *y
);
5849 /* top (or bottom) clipping */
5850 if (*y
+ *height
> ymax
)
5851 *height
-= (*y
+ *height
- ymax
);
5861 * Clip dst coords against Xmax (or Ymax).
5864 clip_right_or_top(GLint
*srcX0
, GLint
*srcX1
,
5865 GLint
*dstX0
, GLint
*dstX1
,
5870 if (*dstX1
> maxValue
) {
5871 /* X1 outside right edge */
5872 ASSERT(*dstX0
< maxValue
); /* X0 should be inside right edge */
5873 t
= (GLfloat
) (maxValue
- *dstX0
) / (GLfloat
) (*dstX1
- *dstX0
);
5874 /* chop off [t, 1] part */
5875 ASSERT(t
>= 0.0 && t
<= 1.0);
5877 bias
= (*srcX0
< *srcX1
) ? 0.5F
: -0.5F
;
5878 *srcX1
= *srcX0
+ (GLint
) (t
* (*srcX1
- *srcX0
) + bias
);
5880 else if (*dstX0
> maxValue
) {
5881 /* X0 outside right edge */
5882 ASSERT(*dstX1
< maxValue
); /* X1 should be inside right edge */
5883 t
= (GLfloat
) (maxValue
- *dstX1
) / (GLfloat
) (*dstX0
- *dstX1
);
5884 /* chop off [t, 1] part */
5885 ASSERT(t
>= 0.0 && t
<= 1.0);
5887 bias
= (*srcX0
< *srcX1
) ? -0.5F
: 0.5F
;
5888 *srcX0
= *srcX1
+ (GLint
) (t
* (*srcX0
- *srcX1
) + bias
);
5894 * Clip dst coords against Xmin (or Ymin).
5897 clip_left_or_bottom(GLint
*srcX0
, GLint
*srcX1
,
5898 GLint
*dstX0
, GLint
*dstX1
,
5903 if (*dstX0
< minValue
) {
5904 /* X0 outside left edge */
5905 ASSERT(*dstX1
> minValue
); /* X1 should be inside left edge */
5906 t
= (GLfloat
) (minValue
- *dstX0
) / (GLfloat
) (*dstX1
- *dstX0
);
5907 /* chop off [0, t] part */
5908 ASSERT(t
>= 0.0 && t
<= 1.0);
5910 bias
= (*srcX0
< *srcX1
) ? 0.5F
: -0.5F
; /* flipped??? */
5911 *srcX0
= *srcX0
+ (GLint
) (t
* (*srcX1
- *srcX0
) + bias
);
5913 else if (*dstX1
< minValue
) {
5914 /* X1 outside left edge */
5915 ASSERT(*dstX0
> minValue
); /* X0 should be inside left edge */
5916 t
= (GLfloat
) (minValue
- *dstX1
) / (GLfloat
) (*dstX0
- *dstX1
);
5917 /* chop off [0, t] part */
5918 ASSERT(t
>= 0.0 && t
<= 1.0);
5920 bias
= (*srcX0
< *srcX1
) ? 0.5F
: -0.5F
;
5921 *srcX1
= *srcX1
+ (GLint
) (t
* (*srcX0
- *srcX1
) + bias
);
5927 * Do clipping of blit src/dest rectangles.
5928 * The dest rect is clipped against both the buffer bounds and scissor bounds.
5929 * The src rect is just clipped against the buffer bounds.
5931 * When either the src or dest rect is clipped, the other is also clipped
5934 * Note that X0 need not be less than X1 (same for Y) for either the source
5935 * and dest rects. That makes the clipping a little trickier.
5937 * \return GL_TRUE if anything is left to draw, GL_FALSE if totally clipped
5940 _mesa_clip_blit(struct gl_context
*ctx
,
5941 GLint
*srcX0
, GLint
*srcY0
, GLint
*srcX1
, GLint
*srcY1
,
5942 GLint
*dstX0
, GLint
*dstY0
, GLint
*dstX1
, GLint
*dstY1
)
5944 const GLint srcXmin
= 0;
5945 const GLint srcXmax
= ctx
->ReadBuffer
->Width
;
5946 const GLint srcYmin
= 0;
5947 const GLint srcYmax
= ctx
->ReadBuffer
->Height
;
5949 /* these include scissor bounds */
5950 const GLint dstXmin
= ctx
->DrawBuffer
->_Xmin
;
5951 const GLint dstXmax
= ctx
->DrawBuffer
->_Xmax
;
5952 const GLint dstYmin
= ctx
->DrawBuffer
->_Ymin
;
5953 const GLint dstYmax
= ctx
->DrawBuffer
->_Ymax
;
5956 printf("PreClipX: src: %d .. %d dst: %d .. %d\n",
5957 *srcX0, *srcX1, *dstX0, *dstX1);
5958 printf("PreClipY: src: %d .. %d dst: %d .. %d\n",
5959 *srcY0, *srcY1, *dstY0, *dstY1);
5962 /* trivial rejection tests */
5963 if (*dstX0
== *dstX1
)
5964 return GL_FALSE
; /* no width */
5965 if (*dstX0
<= dstXmin
&& *dstX1
<= dstXmin
)
5966 return GL_FALSE
; /* totally out (left) of bounds */
5967 if (*dstX0
>= dstXmax
&& *dstX1
>= dstXmax
)
5968 return GL_FALSE
; /* totally out (right) of bounds */
5970 if (*dstY0
== *dstY1
)
5972 if (*dstY0
<= dstYmin
&& *dstY1
<= dstYmin
)
5974 if (*dstY0
>= dstYmax
&& *dstY1
>= dstYmax
)
5977 if (*srcX0
== *srcX1
)
5979 if (*srcX0
<= srcXmin
&& *srcX1
<= srcXmin
)
5981 if (*srcX0
>= srcXmax
&& *srcX1
>= srcXmax
)
5984 if (*srcY0
== *srcY1
)
5986 if (*srcY0
<= srcYmin
&& *srcY1
<= srcYmin
)
5988 if (*srcY0
>= srcYmax
&& *srcY1
>= srcYmax
)
5994 clip_right_or_top(srcX0
, srcX1
, dstX0
, dstX1
, dstXmax
);
5995 clip_right_or_top(srcY0
, srcY1
, dstY0
, dstY1
, dstYmax
);
5996 clip_left_or_bottom(srcX0
, srcX1
, dstX0
, dstX1
, dstXmin
);
5997 clip_left_or_bottom(srcY0
, srcY1
, dstY0
, dstY1
, dstYmin
);
6000 * src clip (just swap src/dst values from above)
6002 clip_right_or_top(dstX0
, dstX1
, srcX0
, srcX1
, srcXmax
);
6003 clip_right_or_top(dstY0
, dstY1
, srcY0
, srcY1
, srcYmax
);
6004 clip_left_or_bottom(dstX0
, dstX1
, srcX0
, srcX1
, srcXmin
);
6005 clip_left_or_bottom(dstY0
, dstY1
, srcY0
, srcY1
, srcYmin
);
6008 printf("PostClipX: src: %d .. %d dst: %d .. %d\n",
6009 *srcX0, *srcX1, *dstX0, *dstX1);
6010 printf("PostClipY: src: %d .. %d dst: %d .. %d\n",
6011 *srcY0, *srcY1, *dstY0, *dstY1);
6014 ASSERT(*dstX0
>= dstXmin
);
6015 ASSERT(*dstX0
<= dstXmax
);
6016 ASSERT(*dstX1
>= dstXmin
);
6017 ASSERT(*dstX1
<= dstXmax
);
6019 ASSERT(*dstY0
>= dstYmin
);
6020 ASSERT(*dstY0
<= dstYmax
);
6021 ASSERT(*dstY1
>= dstYmin
);
6022 ASSERT(*dstY1
<= dstYmax
);
6024 ASSERT(*srcX0
>= srcXmin
);
6025 ASSERT(*srcX0
<= srcXmax
);
6026 ASSERT(*srcX1
>= srcXmin
);
6027 ASSERT(*srcX1
<= srcXmax
);
6029 ASSERT(*srcY0
>= srcYmin
);
6030 ASSERT(*srcY0
<= srcYmax
);
6031 ASSERT(*srcY1
>= srcYmin
);
6032 ASSERT(*srcY1
<= srcYmax
);