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
:
291 case GL_RGB_INTEGER_EXT
:
294 case GL_RGBA_INTEGER_EXT
:
304 case GL_DEPTH_STENCIL_EXT
:
316 * Get the bytes per pixel of pixel format type pair.
318 * \param format pixel format.
319 * \param type pixel type.
321 * \return bytes per pixel, or -1 if a bad format or type was given.
324 _mesa_bytes_per_pixel( GLenum format
, GLenum type
)
326 GLint comps
= _mesa_components_in_format( format
);
332 return 0; /* special case */
334 case GL_UNSIGNED_BYTE
:
335 return comps
* sizeof(GLubyte
);
337 case GL_UNSIGNED_SHORT
:
338 return comps
* sizeof(GLshort
);
340 case GL_UNSIGNED_INT
:
341 return comps
* sizeof(GLint
);
343 return comps
* sizeof(GLfloat
);
344 case GL_HALF_FLOAT_ARB
:
345 return comps
* sizeof(GLhalfARB
);
346 case GL_UNSIGNED_BYTE_3_3_2
:
347 case GL_UNSIGNED_BYTE_2_3_3_REV
:
348 if (format
== GL_RGB
|| format
== GL_BGR
)
349 return sizeof(GLubyte
);
351 return -1; /* error */
352 case GL_UNSIGNED_SHORT_5_6_5
:
353 case GL_UNSIGNED_SHORT_5_6_5_REV
:
354 if (format
== GL_RGB
|| format
== GL_BGR
)
355 return sizeof(GLushort
);
357 return -1; /* error */
358 case GL_UNSIGNED_SHORT_4_4_4_4
:
359 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
360 case GL_UNSIGNED_SHORT_5_5_5_1
:
361 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
362 if (format
== GL_RGBA
|| format
== GL_BGRA
|| format
== GL_ABGR_EXT
)
363 return sizeof(GLushort
);
366 case GL_UNSIGNED_INT_8_8_8_8
:
367 case GL_UNSIGNED_INT_8_8_8_8_REV
:
368 case GL_UNSIGNED_INT_10_10_10_2
:
369 case GL_UNSIGNED_INT_2_10_10_10_REV
:
370 if (format
== GL_RGBA
|| format
== GL_BGRA
|| format
== GL_ABGR_EXT
)
371 return sizeof(GLuint
);
374 case GL_UNSIGNED_SHORT_8_8_MESA
:
375 case GL_UNSIGNED_SHORT_8_8_REV_MESA
:
376 if (format
== GL_YCBCR_MESA
)
377 return sizeof(GLushort
);
380 case GL_UNSIGNED_INT_24_8_EXT
:
381 if (format
== GL_DEPTH_STENCIL_EXT
)
382 return sizeof(GLuint
);
392 * Test for a legal pixel format and type.
394 * \param format pixel format.
395 * \param type pixel type.
397 * \return GL_TRUE if the given pixel format and type are legal, or GL_FALSE
401 _mesa_is_legal_format_and_type( GLcontext
*ctx
, GLenum format
, GLenum type
)
405 case GL_STENCIL_INDEX
:
409 case GL_UNSIGNED_BYTE
:
411 case GL_UNSIGNED_SHORT
:
413 case GL_UNSIGNED_INT
:
416 case GL_HALF_FLOAT_ARB
:
417 return ctx
->Extensions
.ARB_half_float_pixel
;
425 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
429 case GL_LUMINANCE_ALPHA
:
430 case GL_DEPTH_COMPONENT
:
433 case GL_UNSIGNED_BYTE
:
435 case GL_UNSIGNED_SHORT
:
437 case GL_UNSIGNED_INT
:
440 case GL_HALF_FLOAT_ARB
:
441 return ctx
->Extensions
.ARB_half_float_pixel
;
448 case GL_UNSIGNED_BYTE
:
450 case GL_UNSIGNED_SHORT
:
452 case GL_UNSIGNED_INT
:
454 case GL_UNSIGNED_BYTE_3_3_2
:
455 case GL_UNSIGNED_BYTE_2_3_3_REV
:
456 case GL_UNSIGNED_SHORT_5_6_5
:
457 case GL_UNSIGNED_SHORT_5_6_5_REV
:
459 case GL_HALF_FLOAT_ARB
:
460 return ctx
->Extensions
.ARB_half_float_pixel
;
466 /* NOTE: no packed types are supported with BGR. That's
467 * intentional, according to the GL spec.
470 case GL_UNSIGNED_BYTE
:
472 case GL_UNSIGNED_SHORT
:
474 case GL_UNSIGNED_INT
:
477 case GL_HALF_FLOAT_ARB
:
478 return ctx
->Extensions
.ARB_half_float_pixel
;
487 case GL_UNSIGNED_BYTE
:
489 case GL_UNSIGNED_SHORT
:
491 case GL_UNSIGNED_INT
:
493 case GL_UNSIGNED_SHORT_4_4_4_4
:
494 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
495 case GL_UNSIGNED_SHORT_5_5_5_1
:
496 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
497 case GL_UNSIGNED_INT_8_8_8_8
:
498 case GL_UNSIGNED_INT_8_8_8_8_REV
:
499 case GL_UNSIGNED_INT_10_10_10_2
:
500 case GL_UNSIGNED_INT_2_10_10_10_REV
:
502 case GL_HALF_FLOAT_ARB
:
503 return ctx
->Extensions
.ARB_half_float_pixel
;
508 if (type
== GL_UNSIGNED_SHORT_8_8_MESA
||
509 type
== GL_UNSIGNED_SHORT_8_8_REV_MESA
)
513 case GL_DEPTH_STENCIL_EXT
:
514 if (ctx
->Extensions
.EXT_packed_depth_stencil
515 && type
== GL_UNSIGNED_INT_24_8_EXT
)
523 case GL_UNSIGNED_BYTE
:
525 case GL_UNSIGNED_SHORT
:
527 case GL_UNSIGNED_INT
:
533 case GL_RED_INTEGER_EXT
:
534 case GL_GREEN_INTEGER_EXT
:
535 case GL_BLUE_INTEGER_EXT
:
536 case GL_ALPHA_INTEGER_EXT
:
537 case GL_RGB_INTEGER_EXT
:
538 case GL_RGBA_INTEGER_EXT
:
539 case GL_BGR_INTEGER_EXT
:
540 case GL_BGRA_INTEGER_EXT
:
541 case GL_LUMINANCE_INTEGER_EXT
:
542 case GL_LUMINANCE_ALPHA_INTEGER_EXT
:
545 case GL_UNSIGNED_BYTE
:
547 case GL_UNSIGNED_SHORT
:
549 case GL_UNSIGNED_INT
:
550 return ctx
->Extensions
.EXT_texture_integer
;
563 * Test if the given image format is a color/RGBA format (i.e., not color
564 * index, depth, stencil, etc).
565 * \param format the image format value (may by an internal texture format)
566 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
569 _mesa_is_color_format(GLenum format
)
587 case GL_LUMINANCE_ALPHA
:
588 case GL_LUMINANCE4_ALPHA4
:
589 case GL_LUMINANCE6_ALPHA2
:
590 case GL_LUMINANCE8_ALPHA8
:
591 case GL_LUMINANCE12_ALPHA4
:
592 case GL_LUMINANCE12_ALPHA12
:
593 case GL_LUMINANCE16_ALPHA16
:
620 /* float texture formats */
621 case GL_ALPHA16F_ARB
:
622 case GL_ALPHA32F_ARB
:
623 case GL_LUMINANCE16F_ARB
:
624 case GL_LUMINANCE32F_ARB
:
625 case GL_LUMINANCE_ALPHA16F_ARB
:
626 case GL_LUMINANCE_ALPHA32F_ARB
:
627 case GL_INTENSITY16F_ARB
:
628 case GL_INTENSITY32F_ARB
:
633 /* compressed formats */
634 case GL_COMPRESSED_ALPHA
:
635 case GL_COMPRESSED_LUMINANCE
:
636 case GL_COMPRESSED_LUMINANCE_ALPHA
:
637 case GL_COMPRESSED_INTENSITY
:
638 case GL_COMPRESSED_RGB
:
639 case GL_COMPRESSED_RGBA
:
644 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
645 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
646 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
647 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
648 case GL_COMPRESSED_RGB_FXT1_3DFX
:
649 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
650 #if FEATURE_EXT_texture_sRGB
653 case GL_SRGB_ALPHA_EXT
:
654 case GL_SRGB8_ALPHA8_EXT
:
655 case GL_SLUMINANCE_ALPHA_EXT
:
656 case GL_SLUMINANCE8_ALPHA8_EXT
:
657 case GL_SLUMINANCE_EXT
:
658 case GL_SLUMINANCE8_EXT
:
659 case GL_COMPRESSED_SRGB_EXT
:
660 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
661 case GL_COMPRESSED_SRGB_ALPHA_EXT
:
662 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
663 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
664 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
665 case GL_COMPRESSED_SLUMINANCE_EXT
:
666 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT
:
667 #endif /* FEATURE_EXT_texture_sRGB */
669 /* signed texture formats */
673 case GL_YCBCR_MESA
: /* not considered to be RGB */
682 * Test if the given image format is a color index format.
685 _mesa_is_index_format(GLenum format
)
689 case GL_COLOR_INDEX1_EXT
:
690 case GL_COLOR_INDEX2_EXT
:
691 case GL_COLOR_INDEX4_EXT
:
692 case GL_COLOR_INDEX8_EXT
:
693 case GL_COLOR_INDEX12_EXT
:
694 case GL_COLOR_INDEX16_EXT
:
703 * Test if the given image format is a depth component format.
706 _mesa_is_depth_format(GLenum format
)
709 case GL_DEPTH_COMPONENT
:
710 case GL_DEPTH_COMPONENT16
:
711 case GL_DEPTH_COMPONENT24
:
712 case GL_DEPTH_COMPONENT32
:
721 * Test if the given image format is a stencil format.
724 _mesa_is_stencil_format(GLenum format
)
727 case GL_STENCIL_INDEX
:
728 case GL_DEPTH_STENCIL
:
737 * Test if the given image format is a YCbCr format.
740 _mesa_is_ycbcr_format(GLenum format
)
752 * Test if the given image format is a depth+stencil format.
755 _mesa_is_depthstencil_format(GLenum format
)
758 case GL_DEPTH24_STENCIL8_EXT
:
759 case GL_DEPTH_STENCIL_EXT
:
768 * Test if the given image format is a depth or stencil format.
771 _mesa_is_depth_or_stencil_format(GLenum format
)
774 case GL_DEPTH_COMPONENT
:
775 case GL_DEPTH_COMPONENT16
:
776 case GL_DEPTH_COMPONENT24
:
777 case GL_DEPTH_COMPONENT32
:
778 case GL_STENCIL_INDEX
:
779 case GL_STENCIL_INDEX1_EXT
:
780 case GL_STENCIL_INDEX4_EXT
:
781 case GL_STENCIL_INDEX8_EXT
:
782 case GL_STENCIL_INDEX16_EXT
:
783 case GL_DEPTH_STENCIL_EXT
:
784 case GL_DEPTH24_STENCIL8_EXT
:
793 * Test if the given image format is a dudv format.
796 _mesa_is_dudv_format(GLenum format
)
809 * Test if the given format is an integer (non-normalized) format.
812 _mesa_is_integer_format(GLenum format
)
815 case GL_RED_INTEGER_EXT
:
816 case GL_GREEN_INTEGER_EXT
:
817 case GL_BLUE_INTEGER_EXT
:
818 case GL_ALPHA_INTEGER_EXT
:
819 case GL_RGB_INTEGER_EXT
:
820 case GL_RGBA_INTEGER_EXT
:
821 case GL_BGR_INTEGER_EXT
:
822 case GL_BGRA_INTEGER_EXT
:
823 case GL_LUMINANCE_INTEGER_EXT
:
824 case GL_LUMINANCE_ALPHA_INTEGER_EXT
:
833 * Test if an image format is a supported compressed format.
834 * \param format the internal format token provided by the user.
835 * \return GL_TRUE if compressed, GL_FALSE if uncompressed
838 _mesa_is_compressed_format(GLcontext
*ctx
, GLenum format
)
841 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
842 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
843 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
844 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
845 return ctx
->Extensions
.EXT_texture_compression_s3tc
;
850 return ctx
->Extensions
.S3_s3tc
;
851 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
852 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
853 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
854 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
855 return ctx
->Extensions
.EXT_texture_sRGB
856 && ctx
->Extensions
.EXT_texture_compression_s3tc
;
857 case GL_COMPRESSED_RGB_FXT1_3DFX
:
858 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
859 return ctx
->Extensions
.TDFX_texture_compression_FXT1
;
867 * Return the address of a specific pixel in an image (1D, 2D or 3D).
869 * Pixel unpacking/packing parameters are observed according to \p packing.
871 * \param dimensions either 1, 2 or 3 to indicate dimensionality of image
872 * \param image starting address of image data
873 * \param width the image width
874 * \param height theimage height
875 * \param format the pixel format
876 * \param type the pixel data type
877 * \param packing the pixelstore attributes
878 * \param img which image in the volume (0 for 1D or 2D images)
879 * \param row row of pixel in the image (0 for 1D images)
880 * \param column column of pixel in the image
882 * \return address of pixel on success, or NULL on error.
884 * \sa gl_pixelstore_attrib.
887 _mesa_image_address( GLuint dimensions
,
888 const struct gl_pixelstore_attrib
*packing
,
890 GLsizei width
, GLsizei height
,
891 GLenum format
, GLenum type
,
892 GLint img
, GLint row
, GLint column
)
894 GLint alignment
; /* 1, 2 or 4 */
895 GLint pixels_per_row
;
896 GLint rows_per_image
;
899 GLint skipimages
; /* for 3-D volume images */
902 ASSERT(dimensions
>= 1 && dimensions
<= 3);
904 alignment
= packing
->Alignment
;
905 if (packing
->RowLength
> 0) {
906 pixels_per_row
= packing
->RowLength
;
909 pixels_per_row
= width
;
911 if (packing
->ImageHeight
> 0) {
912 rows_per_image
= packing
->ImageHeight
;
915 rows_per_image
= height
;
918 skippixels
= packing
->SkipPixels
;
919 /* Note: SKIP_ROWS _is_ used for 1D images */
920 skiprows
= packing
->SkipRows
;
921 /* Note: SKIP_IMAGES is only used for 3D images */
922 skipimages
= (dimensions
== 3) ? packing
->SkipImages
: 0;
924 if (type
== GL_BITMAP
) {
926 GLint comp_per_pixel
; /* components per pixel */
927 GLint bytes_per_comp
; /* bytes per component */
929 GLint bytes_per_image
;
931 /* Compute bytes per component */
932 bytes_per_comp
= _mesa_sizeof_packed_type( type
);
933 if (bytes_per_comp
< 0) {
937 /* Compute number of components per pixel */
938 comp_per_pixel
= _mesa_components_in_format( format
);
939 if (comp_per_pixel
< 0) {
943 bytes_per_row
= alignment
944 * CEILING( comp_per_pixel
*pixels_per_row
, 8*alignment
);
946 bytes_per_image
= bytes_per_row
* rows_per_image
;
948 pixel_addr
= (GLubyte
*) image
949 + (skipimages
+ img
) * bytes_per_image
950 + (skiprows
+ row
) * bytes_per_row
951 + (skippixels
+ column
) / 8;
954 /* Non-BITMAP data */
955 GLint bytes_per_pixel
, bytes_per_row
, remainder
, bytes_per_image
;
958 bytes_per_pixel
= _mesa_bytes_per_pixel( format
, type
);
960 /* The pixel type and format should have been error checked earlier */
961 assert(bytes_per_pixel
> 0);
963 bytes_per_row
= pixels_per_row
* bytes_per_pixel
;
964 remainder
= bytes_per_row
% alignment
;
966 bytes_per_row
+= (alignment
- remainder
);
968 ASSERT(bytes_per_row
% alignment
== 0);
970 bytes_per_image
= bytes_per_row
* rows_per_image
;
972 if (packing
->Invert
) {
973 /* set pixel_addr to the last row */
974 topOfImage
= bytes_per_row
* (height
- 1);
975 bytes_per_row
= -bytes_per_row
;
981 /* compute final pixel address */
982 pixel_addr
= (GLubyte
*) image
983 + (skipimages
+ img
) * bytes_per_image
985 + (skiprows
+ row
) * bytes_per_row
986 + (skippixels
+ column
) * bytes_per_pixel
;
989 return (GLvoid
*) pixel_addr
;
994 _mesa_image_address1d( const struct gl_pixelstore_attrib
*packing
,
997 GLenum format
, GLenum type
,
1000 return _mesa_image_address(1, packing
, image
, width
, 1,
1001 format
, type
, 0, 0, column
);
1006 _mesa_image_address2d( const struct gl_pixelstore_attrib
*packing
,
1007 const GLvoid
*image
,
1008 GLsizei width
, GLsizei height
,
1009 GLenum format
, GLenum type
,
1010 GLint row
, GLint column
)
1012 return _mesa_image_address(2, packing
, image
, width
, height
,
1013 format
, type
, 0, row
, column
);
1018 _mesa_image_address3d( const struct gl_pixelstore_attrib
*packing
,
1019 const GLvoid
*image
,
1020 GLsizei width
, GLsizei height
,
1021 GLenum format
, GLenum type
,
1022 GLint img
, GLint row
, GLint column
)
1024 return _mesa_image_address(3, packing
, image
, width
, height
,
1025 format
, type
, img
, row
, column
);
1031 * Compute the stride (in bytes) between image rows.
1033 * \param packing the pixelstore attributes
1034 * \param width image width.
1035 * \param format pixel format.
1036 * \param type pixel data type.
1038 * \return the stride in bytes for the given parameters, or -1 if error
1041 _mesa_image_row_stride( const struct gl_pixelstore_attrib
*packing
,
1042 GLint width
, GLenum format
, GLenum type
)
1044 GLint bytesPerRow
, remainder
;
1048 if (type
== GL_BITMAP
) {
1049 if (packing
->RowLength
== 0) {
1050 bytesPerRow
= (width
+ 7) / 8;
1053 bytesPerRow
= (packing
->RowLength
+ 7) / 8;
1057 /* Non-BITMAP data */
1058 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
1059 if (bytesPerPixel
<= 0)
1060 return -1; /* error */
1061 if (packing
->RowLength
== 0) {
1062 bytesPerRow
= bytesPerPixel
* width
;
1065 bytesPerRow
= bytesPerPixel
* packing
->RowLength
;
1069 remainder
= bytesPerRow
% packing
->Alignment
;
1070 if (remainder
> 0) {
1071 bytesPerRow
+= (packing
->Alignment
- remainder
);
1074 if (packing
->Invert
) {
1075 /* negate the bytes per row (negative row stride) */
1076 bytesPerRow
= -bytesPerRow
;
1086 * Compute the stride between images in a 3D texture (in bytes) for the given
1087 * pixel packing parameters and image width, format and type.
1090 _mesa_image_image_stride( const struct gl_pixelstore_attrib
*packing
,
1091 GLint width
, GLint height
,
1092 GLenum format
, GLenum type
)
1094 GLint bytesPerRow
, bytesPerImage
, remainder
;
1098 if (type
== GL_BITMAP
) {
1099 if (packing
->RowLength
== 0) {
1100 bytesPerRow
= (width
+ 7) / 8;
1103 bytesPerRow
= (packing
->RowLength
+ 7) / 8;
1107 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
1109 if (bytesPerPixel
<= 0)
1110 return -1; /* error */
1111 if (packing
->RowLength
== 0) {
1112 bytesPerRow
= bytesPerPixel
* width
;
1115 bytesPerRow
= bytesPerPixel
* packing
->RowLength
;
1119 remainder
= bytesPerRow
% packing
->Alignment
;
1121 bytesPerRow
+= (packing
->Alignment
- remainder
);
1123 if (packing
->ImageHeight
== 0)
1124 bytesPerImage
= bytesPerRow
* height
;
1126 bytesPerImage
= bytesPerRow
* packing
->ImageHeight
;
1128 return bytesPerImage
;
1133 * Unpack a 32x32 pixel polygon stipple from user memory using the
1134 * current pixel unpack settings.
1137 _mesa_unpack_polygon_stipple( const GLubyte
*pattern
, GLuint dest
[32],
1138 const struct gl_pixelstore_attrib
*unpacking
)
1140 GLubyte
*ptrn
= (GLubyte
*) _mesa_unpack_bitmap(32, 32, pattern
, unpacking
);
1142 /* Convert pattern from GLubytes to GLuints and handle big/little
1143 * endian differences
1147 for (i
= 0; i
< 32; i
++) {
1148 dest
[i
] = (p
[0] << 24)
1160 * Pack polygon stipple into user memory given current pixel packing
1164 _mesa_pack_polygon_stipple( const GLuint pattern
[32], GLubyte
*dest
,
1165 const struct gl_pixelstore_attrib
*packing
)
1167 /* Convert pattern from GLuints to GLubytes to handle big/little
1168 * endian differences.
1172 for (i
= 0; i
< 32; i
++) {
1173 ptrn
[i
* 4 + 0] = (GLubyte
) ((pattern
[i
] >> 24) & 0xff);
1174 ptrn
[i
* 4 + 1] = (GLubyte
) ((pattern
[i
] >> 16) & 0xff);
1175 ptrn
[i
* 4 + 2] = (GLubyte
) ((pattern
[i
] >> 8 ) & 0xff);
1176 ptrn
[i
* 4 + 3] = (GLubyte
) ((pattern
[i
] ) & 0xff);
1179 _mesa_pack_bitmap(32, 32, ptrn
, dest
, packing
);
1184 * Unpack bitmap data. Resulting data will be in most-significant-bit-first
1185 * order with row alignment = 1 byte.
1188 _mesa_unpack_bitmap( GLint width
, GLint height
, const GLubyte
*pixels
,
1189 const struct gl_pixelstore_attrib
*packing
)
1191 GLint bytes
, row
, width_in_bytes
;
1192 GLubyte
*buffer
, *dst
;
1197 /* Alloc dest storage */
1198 bytes
= ((width
+ 7) / 8 * height
);
1199 buffer
= (GLubyte
*) malloc( bytes
);
1203 width_in_bytes
= CEILING( width
, 8 );
1205 for (row
= 0; row
< height
; row
++) {
1206 const GLubyte
*src
= (const GLubyte
*)
1207 _mesa_image_address2d(packing
, pixels
, width
, height
,
1208 GL_COLOR_INDEX
, GL_BITMAP
, row
, 0);
1214 if ((packing
->SkipPixels
& 7) == 0) {
1215 memcpy( dst
, src
, width_in_bytes
);
1216 if (packing
->LsbFirst
) {
1217 flip_bytes( dst
, width_in_bytes
);
1221 /* handling SkipPixels is a bit tricky (no pun intended!) */
1223 if (packing
->LsbFirst
) {
1224 GLubyte srcMask
= 1 << (packing
->SkipPixels
& 0x7);
1225 GLubyte dstMask
= 128;
1226 const GLubyte
*s
= src
;
1229 for (i
= 0; i
< width
; i
++) {
1233 if (srcMask
== 128) {
1238 srcMask
= srcMask
<< 1;
1246 dstMask
= dstMask
>> 1;
1251 GLubyte srcMask
= 128 >> (packing
->SkipPixels
& 0x7);
1252 GLubyte dstMask
= 128;
1253 const GLubyte
*s
= src
;
1256 for (i
= 0; i
< width
; i
++) {
1265 srcMask
= srcMask
>> 1;
1273 dstMask
= dstMask
>> 1;
1278 dst
+= width_in_bytes
;
1289 _mesa_pack_bitmap( GLint width
, GLint height
, const GLubyte
*source
,
1290 GLubyte
*dest
, const struct gl_pixelstore_attrib
*packing
)
1292 GLint row
, width_in_bytes
;
1298 width_in_bytes
= CEILING( width
, 8 );
1300 for (row
= 0; row
< height
; row
++) {
1301 GLubyte
*dst
= (GLubyte
*) _mesa_image_address2d(packing
, dest
,
1302 width
, height
, GL_COLOR_INDEX
, GL_BITMAP
, row
, 0);
1306 if ((packing
->SkipPixels
& 7) == 0) {
1307 memcpy( dst
, src
, width_in_bytes
);
1308 if (packing
->LsbFirst
) {
1309 flip_bytes( dst
, width_in_bytes
);
1313 /* handling SkipPixels is a bit tricky (no pun intended!) */
1315 if (packing
->LsbFirst
) {
1316 GLubyte srcMask
= 128;
1317 GLubyte dstMask
= 1 << (packing
->SkipPixels
& 0x7);
1318 const GLubyte
*s
= src
;
1321 for (i
= 0; i
< width
; i
++) {
1330 srcMask
= srcMask
>> 1;
1332 if (dstMask
== 128) {
1338 dstMask
= dstMask
<< 1;
1343 GLubyte srcMask
= 128;
1344 GLubyte dstMask
= 128 >> (packing
->SkipPixels
& 0x7);
1345 const GLubyte
*s
= src
;
1348 for (i
= 0; i
< width
; i
++) {
1357 srcMask
= srcMask
>> 1;
1365 dstMask
= dstMask
>> 1;
1370 src
+= width_in_bytes
;
1376 * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel.
1377 * This is typically used to convert a bitmap into a GLubyte/pixel texture.
1378 * "On" bits will set texels to \p onValue.
1379 * "Off" bits will not modify texels.
1380 * \param width src bitmap width in pixels
1381 * \param height src bitmap height in pixels
1382 * \param unpack bitmap unpacking state
1383 * \param bitmap the src bitmap data
1384 * \param destBuffer start of dest buffer
1385 * \param destStride row stride in dest buffer
1386 * \param onValue if bit is 1, set destBuffer pixel to this value
1389 _mesa_expand_bitmap(GLsizei width
, GLsizei height
,
1390 const struct gl_pixelstore_attrib
*unpack
,
1391 const GLubyte
*bitmap
,
1392 GLubyte
*destBuffer
, GLint destStride
,
1395 const GLubyte
*srcRow
= (const GLubyte
*)
1396 _mesa_image_address2d(unpack
, bitmap
, width
, height
,
1397 GL_COLOR_INDEX
, GL_BITMAP
, 0, 0);
1398 const GLint srcStride
= _mesa_image_row_stride(unpack
, width
,
1399 GL_COLOR_INDEX
, GL_BITMAP
);
1402 #define SET_PIXEL(COL, ROW) \
1403 destBuffer[(ROW) * destStride + (COL)] = onValue;
1405 for (row
= 0; row
< height
; row
++) {
1406 const GLubyte
*src
= srcRow
;
1408 if (unpack
->LsbFirst
) {
1410 GLubyte mask
= 1U << (unpack
->SkipPixels
& 0x7);
1411 for (col
= 0; col
< width
; col
++) {
1414 SET_PIXEL(col
, row
);
1426 /* get ready for next row */
1432 GLubyte mask
= 128U >> (unpack
->SkipPixels
& 0x7);
1433 for (col
= 0; col
< width
; col
++) {
1436 SET_PIXEL(col
, row
);
1448 /* get ready for next row */
1453 srcRow
+= srcStride
;
1460 /**********************************************************************/
1461 /***** Pixel processing functions ******/
1462 /**********************************************************************/
1465 * Apply scale and bias factors to an array of RGBA pixels.
1468 _mesa_scale_and_bias_rgba(GLuint n
, GLfloat rgba
[][4],
1469 GLfloat rScale
, GLfloat gScale
,
1470 GLfloat bScale
, GLfloat aScale
,
1471 GLfloat rBias
, GLfloat gBias
,
1472 GLfloat bBias
, GLfloat aBias
)
1474 if (rScale
!= 1.0 || rBias
!= 0.0) {
1476 for (i
= 0; i
< n
; i
++) {
1477 rgba
[i
][RCOMP
] = rgba
[i
][RCOMP
] * rScale
+ rBias
;
1480 if (gScale
!= 1.0 || gBias
!= 0.0) {
1482 for (i
= 0; i
< n
; i
++) {
1483 rgba
[i
][GCOMP
] = rgba
[i
][GCOMP
] * gScale
+ gBias
;
1486 if (bScale
!= 1.0 || bBias
!= 0.0) {
1488 for (i
= 0; i
< n
; i
++) {
1489 rgba
[i
][BCOMP
] = rgba
[i
][BCOMP
] * bScale
+ bBias
;
1492 if (aScale
!= 1.0 || aBias
!= 0.0) {
1494 for (i
= 0; i
< n
; i
++) {
1495 rgba
[i
][ACOMP
] = rgba
[i
][ACOMP
] * aScale
+ aBias
;
1502 * Apply pixel mapping to an array of floating point RGBA pixels.
1505 _mesa_map_rgba( const GLcontext
*ctx
, GLuint n
, GLfloat rgba
[][4] )
1507 const GLfloat rscale
= (GLfloat
) (ctx
->PixelMaps
.RtoR
.Size
- 1);
1508 const GLfloat gscale
= (GLfloat
) (ctx
->PixelMaps
.GtoG
.Size
- 1);
1509 const GLfloat bscale
= (GLfloat
) (ctx
->PixelMaps
.BtoB
.Size
- 1);
1510 const GLfloat ascale
= (GLfloat
) (ctx
->PixelMaps
.AtoA
.Size
- 1);
1511 const GLfloat
*rMap
= ctx
->PixelMaps
.RtoR
.Map
;
1512 const GLfloat
*gMap
= ctx
->PixelMaps
.GtoG
.Map
;
1513 const GLfloat
*bMap
= ctx
->PixelMaps
.BtoB
.Map
;
1514 const GLfloat
*aMap
= ctx
->PixelMaps
.AtoA
.Map
;
1517 GLfloat r
= CLAMP(rgba
[i
][RCOMP
], 0.0F
, 1.0F
);
1518 GLfloat g
= CLAMP(rgba
[i
][GCOMP
], 0.0F
, 1.0F
);
1519 GLfloat b
= CLAMP(rgba
[i
][BCOMP
], 0.0F
, 1.0F
);
1520 GLfloat a
= CLAMP(rgba
[i
][ACOMP
], 0.0F
, 1.0F
);
1521 rgba
[i
][RCOMP
] = rMap
[IROUND(r
* rscale
)];
1522 rgba
[i
][GCOMP
] = gMap
[IROUND(g
* gscale
)];
1523 rgba
[i
][BCOMP
] = bMap
[IROUND(b
* bscale
)];
1524 rgba
[i
][ACOMP
] = aMap
[IROUND(a
* ascale
)];
1529 * Apply a color table lookup to an array of floating point RGBA colors.
1532 _mesa_lookup_rgba_float(const struct gl_color_table
*table
,
1533 GLuint n
, GLfloat rgba
[][4])
1535 const GLint max
= table
->Size
- 1;
1536 const GLfloat scale
= (GLfloat
) max
;
1537 const GLfloat
*lut
= table
->TableF
;
1540 if (!table
->TableF
|| table
->Size
== 0)
1543 switch (table
->_BaseFormat
) {
1545 /* replace RGBA with I */
1546 for (i
= 0; i
< n
; i
++) {
1547 GLint j
= IROUND(rgba
[i
][RCOMP
] * scale
);
1548 GLfloat c
= lut
[CLAMP(j
, 0, max
)];
1556 /* replace RGB with L */
1557 for (i
= 0; i
< n
; i
++) {
1558 GLint j
= IROUND(rgba
[i
][RCOMP
] * scale
);
1559 GLfloat c
= lut
[CLAMP(j
, 0, max
)];
1566 /* replace A with A */
1567 for (i
= 0; i
< n
; i
++) {
1568 GLint j
= IROUND(rgba
[i
][ACOMP
] * scale
);
1569 rgba
[i
][ACOMP
] = lut
[CLAMP(j
, 0, max
)];
1572 case GL_LUMINANCE_ALPHA
:
1573 /* replace RGBA with LLLA */
1574 for (i
= 0; i
< n
; i
++) {
1575 GLint jL
= IROUND(rgba
[i
][RCOMP
] * scale
);
1576 GLint jA
= IROUND(rgba
[i
][ACOMP
] * scale
);
1577 GLfloat luminance
, alpha
;
1578 jL
= CLAMP(jL
, 0, max
);
1579 jA
= CLAMP(jA
, 0, max
);
1580 luminance
= lut
[jL
* 2 + 0];
1581 alpha
= lut
[jA
* 2 + 1];
1584 rgba
[i
][BCOMP
] = luminance
;
1585 rgba
[i
][ACOMP
] = alpha
;;
1589 /* replace RGB with RGB */
1590 for (i
= 0; i
< n
; i
++) {
1591 GLint jR
= IROUND(rgba
[i
][RCOMP
] * scale
);
1592 GLint jG
= IROUND(rgba
[i
][GCOMP
] * scale
);
1593 GLint jB
= IROUND(rgba
[i
][BCOMP
] * scale
);
1594 jR
= CLAMP(jR
, 0, max
);
1595 jG
= CLAMP(jG
, 0, max
);
1596 jB
= CLAMP(jB
, 0, max
);
1597 rgba
[i
][RCOMP
] = lut
[jR
* 3 + 0];
1598 rgba
[i
][GCOMP
] = lut
[jG
* 3 + 1];
1599 rgba
[i
][BCOMP
] = lut
[jB
* 3 + 2];
1603 /* replace RGBA with RGBA */
1604 for (i
= 0; i
< n
; i
++) {
1605 GLint jR
= IROUND(rgba
[i
][RCOMP
] * scale
);
1606 GLint jG
= IROUND(rgba
[i
][GCOMP
] * scale
);
1607 GLint jB
= IROUND(rgba
[i
][BCOMP
] * scale
);
1608 GLint jA
= IROUND(rgba
[i
][ACOMP
] * scale
);
1609 jR
= CLAMP(jR
, 0, max
);
1610 jG
= CLAMP(jG
, 0, max
);
1611 jB
= CLAMP(jB
, 0, max
);
1612 jA
= CLAMP(jA
, 0, max
);
1613 rgba
[i
][RCOMP
] = lut
[jR
* 4 + 0];
1614 rgba
[i
][GCOMP
] = lut
[jG
* 4 + 1];
1615 rgba
[i
][BCOMP
] = lut
[jB
* 4 + 2];
1616 rgba
[i
][ACOMP
] = lut
[jA
* 4 + 3];
1620 _mesa_problem(NULL
, "Bad format in _mesa_lookup_rgba_float");
1628 * Apply a color table lookup to an array of ubyte/RGBA colors.
1631 _mesa_lookup_rgba_ubyte(const struct gl_color_table
*table
,
1632 GLuint n
, GLubyte rgba
[][4])
1634 const GLubyte
*lut
= table
->TableUB
;
1635 const GLfloat scale
= (GLfloat
) (table
->Size
- 1) / (GLfloat
)255.0;
1638 if (!table
->TableUB
|| table
->Size
== 0)
1641 switch (table
->_BaseFormat
) {
1643 /* replace RGBA with I */
1644 if (table
->Size
== 256) {
1645 for (i
= 0; i
< n
; i
++) {
1646 const GLubyte c
= lut
[rgba
[i
][RCOMP
]];
1654 for (i
= 0; i
< n
; i
++) {
1655 GLint j
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1659 rgba
[i
][ACOMP
] = lut
[j
];
1664 /* replace RGB with L */
1665 if (table
->Size
== 256) {
1666 for (i
= 0; i
< n
; i
++) {
1667 const GLubyte c
= lut
[rgba
[i
][RCOMP
]];
1674 for (i
= 0; i
< n
; i
++) {
1675 GLint j
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1678 rgba
[i
][BCOMP
] = lut
[j
];
1683 /* replace A with A */
1684 if (table
->Size
== 256) {
1685 for (i
= 0; i
< n
; i
++) {
1686 rgba
[i
][ACOMP
] = lut
[rgba
[i
][ACOMP
]];
1690 for (i
= 0; i
< n
; i
++) {
1691 GLint j
= IROUND((GLfloat
) rgba
[i
][ACOMP
] * scale
);
1692 rgba
[i
][ACOMP
] = lut
[j
];
1696 case GL_LUMINANCE_ALPHA
:
1697 /* replace RGBA with LLLA */
1698 if (table
->Size
== 256) {
1699 for (i
= 0; i
< n
; i
++) {
1700 GLubyte l
= lut
[rgba
[i
][RCOMP
] * 2 + 0];
1701 GLubyte a
= lut
[rgba
[i
][ACOMP
] * 2 + 1];;
1709 for (i
= 0; i
< n
; i
++) {
1710 GLint jL
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1711 GLint jA
= IROUND((GLfloat
) rgba
[i
][ACOMP
] * scale
);
1712 GLubyte luminance
= lut
[jL
* 2 + 0];
1713 GLubyte alpha
= lut
[jA
* 2 + 1];
1716 rgba
[i
][BCOMP
] = luminance
;
1717 rgba
[i
][ACOMP
] = alpha
;
1722 if (table
->Size
== 256) {
1723 for (i
= 0; i
< n
; i
++) {
1724 rgba
[i
][RCOMP
] = lut
[rgba
[i
][RCOMP
] * 3 + 0];
1725 rgba
[i
][GCOMP
] = lut
[rgba
[i
][GCOMP
] * 3 + 1];
1726 rgba
[i
][BCOMP
] = lut
[rgba
[i
][BCOMP
] * 3 + 2];
1730 for (i
= 0; i
< n
; i
++) {
1731 GLint jR
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1732 GLint jG
= IROUND((GLfloat
) rgba
[i
][GCOMP
] * scale
);
1733 GLint jB
= IROUND((GLfloat
) rgba
[i
][BCOMP
] * scale
);
1734 rgba
[i
][RCOMP
] = lut
[jR
* 3 + 0];
1735 rgba
[i
][GCOMP
] = lut
[jG
* 3 + 1];
1736 rgba
[i
][BCOMP
] = lut
[jB
* 3 + 2];
1741 if (table
->Size
== 256) {
1742 for (i
= 0; i
< n
; i
++) {
1743 rgba
[i
][RCOMP
] = lut
[rgba
[i
][RCOMP
] * 4 + 0];
1744 rgba
[i
][GCOMP
] = lut
[rgba
[i
][GCOMP
] * 4 + 1];
1745 rgba
[i
][BCOMP
] = lut
[rgba
[i
][BCOMP
] * 4 + 2];
1746 rgba
[i
][ACOMP
] = lut
[rgba
[i
][ACOMP
] * 4 + 3];
1750 for (i
= 0; i
< n
; i
++) {
1751 GLint jR
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1752 GLint jG
= IROUND((GLfloat
) rgba
[i
][GCOMP
] * scale
);
1753 GLint jB
= IROUND((GLfloat
) rgba
[i
][BCOMP
] * scale
);
1754 GLint jA
= IROUND((GLfloat
) rgba
[i
][ACOMP
] * scale
);
1755 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][RCOMP
], lut
[jR
* 4 + 0]);
1756 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][GCOMP
], lut
[jG
* 4 + 1]);
1757 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][BCOMP
], lut
[jB
* 4 + 2]);
1758 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][ACOMP
], lut
[jA
* 4 + 3]);
1763 _mesa_problem(NULL
, "Bad format in _mesa_lookup_rgba_chan");
1771 * Map color indexes to float rgba values.
1774 _mesa_map_ci_to_rgba( const GLcontext
*ctx
, GLuint n
,
1775 const GLuint index
[], GLfloat rgba
[][4] )
1777 GLuint rmask
= ctx
->PixelMaps
.ItoR
.Size
- 1;
1778 GLuint gmask
= ctx
->PixelMaps
.ItoG
.Size
- 1;
1779 GLuint bmask
= ctx
->PixelMaps
.ItoB
.Size
- 1;
1780 GLuint amask
= ctx
->PixelMaps
.ItoA
.Size
- 1;
1781 const GLfloat
*rMap
= ctx
->PixelMaps
.ItoR
.Map
;
1782 const GLfloat
*gMap
= ctx
->PixelMaps
.ItoG
.Map
;
1783 const GLfloat
*bMap
= ctx
->PixelMaps
.ItoB
.Map
;
1784 const GLfloat
*aMap
= ctx
->PixelMaps
.ItoA
.Map
;
1787 rgba
[i
][RCOMP
] = rMap
[index
[i
] & rmask
];
1788 rgba
[i
][GCOMP
] = gMap
[index
[i
] & gmask
];
1789 rgba
[i
][BCOMP
] = bMap
[index
[i
] & bmask
];
1790 rgba
[i
][ACOMP
] = aMap
[index
[i
] & amask
];
1796 * Map ubyte color indexes to ubyte/RGBA values.
1799 _mesa_map_ci8_to_rgba8(const GLcontext
*ctx
, GLuint n
, const GLubyte index
[],
1802 GLuint rmask
= ctx
->PixelMaps
.ItoR
.Size
- 1;
1803 GLuint gmask
= ctx
->PixelMaps
.ItoG
.Size
- 1;
1804 GLuint bmask
= ctx
->PixelMaps
.ItoB
.Size
- 1;
1805 GLuint amask
= ctx
->PixelMaps
.ItoA
.Size
- 1;
1806 const GLubyte
*rMap
= ctx
->PixelMaps
.ItoR
.Map8
;
1807 const GLubyte
*gMap
= ctx
->PixelMaps
.ItoG
.Map8
;
1808 const GLubyte
*bMap
= ctx
->PixelMaps
.ItoB
.Map8
;
1809 const GLubyte
*aMap
= ctx
->PixelMaps
.ItoA
.Map8
;
1812 rgba
[i
][RCOMP
] = rMap
[index
[i
] & rmask
];
1813 rgba
[i
][GCOMP
] = gMap
[index
[i
] & gmask
];
1814 rgba
[i
][BCOMP
] = bMap
[index
[i
] & bmask
];
1815 rgba
[i
][ACOMP
] = aMap
[index
[i
] & amask
];
1821 _mesa_scale_and_bias_depth(const GLcontext
*ctx
, GLuint n
,
1822 GLfloat depthValues
[])
1824 const GLfloat scale
= ctx
->Pixel
.DepthScale
;
1825 const GLfloat bias
= ctx
->Pixel
.DepthBias
;
1827 for (i
= 0; i
< n
; i
++) {
1828 GLfloat d
= depthValues
[i
] * scale
+ bias
;
1829 depthValues
[i
] = CLAMP(d
, 0.0F
, 1.0F
);
1835 _mesa_scale_and_bias_depth_uint(const GLcontext
*ctx
, GLuint n
,
1836 GLuint depthValues
[])
1838 const GLdouble max
= (double) 0xffffffff;
1839 const GLdouble scale
= ctx
->Pixel
.DepthScale
;
1840 const GLdouble bias
= ctx
->Pixel
.DepthBias
* max
;
1842 for (i
= 0; i
< n
; i
++) {
1843 GLdouble d
= (GLdouble
) depthValues
[i
] * scale
+ bias
;
1844 d
= CLAMP(d
, 0.0, max
);
1845 depthValues
[i
] = (GLuint
) d
;
1850 * Apply various pixel transfer operations to an array of RGBA pixels
1851 * as indicated by the transferOps bitmask
1854 _mesa_apply_rgba_transfer_ops(GLcontext
*ctx
, GLbitfield transferOps
,
1855 GLuint n
, GLfloat rgba
[][4])
1858 if (transferOps
& IMAGE_SCALE_BIAS_BIT
) {
1859 _mesa_scale_and_bias_rgba(n
, rgba
,
1860 ctx
->Pixel
.RedScale
, ctx
->Pixel
.GreenScale
,
1861 ctx
->Pixel
.BlueScale
, ctx
->Pixel
.AlphaScale
,
1862 ctx
->Pixel
.RedBias
, ctx
->Pixel
.GreenBias
,
1863 ctx
->Pixel
.BlueBias
, ctx
->Pixel
.AlphaBias
);
1865 /* color map lookup */
1866 if (transferOps
& IMAGE_MAP_COLOR_BIT
) {
1867 _mesa_map_rgba( ctx
, n
, rgba
);
1870 /* clamping to [0,1] */
1871 if (transferOps
& IMAGE_CLAMP_BIT
) {
1873 for (i
= 0; i
< n
; i
++) {
1874 rgba
[i
][RCOMP
] = CLAMP(rgba
[i
][RCOMP
], 0.0F
, 1.0F
);
1875 rgba
[i
][GCOMP
] = CLAMP(rgba
[i
][GCOMP
], 0.0F
, 1.0F
);
1876 rgba
[i
][BCOMP
] = CLAMP(rgba
[i
][BCOMP
], 0.0F
, 1.0F
);
1877 rgba
[i
][ACOMP
] = CLAMP(rgba
[i
][ACOMP
], 0.0F
, 1.0F
);
1884 * Apply color index shift and offset to an array of pixels.
1887 shift_and_offset_ci( const GLcontext
*ctx
, GLuint n
, GLuint indexes
[] )
1889 GLint shift
= ctx
->Pixel
.IndexShift
;
1890 GLint offset
= ctx
->Pixel
.IndexOffset
;
1894 indexes
[i
] = (indexes
[i
] << shift
) + offset
;
1897 else if (shift
< 0) {
1900 indexes
[i
] = (indexes
[i
] >> shift
) + offset
;
1905 indexes
[i
] = indexes
[i
] + offset
;
1913 * Apply color index shift, offset and table lookup to an array
1917 _mesa_apply_ci_transfer_ops(const GLcontext
*ctx
, GLbitfield transferOps
,
1918 GLuint n
, GLuint indexes
[])
1920 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
1921 shift_and_offset_ci(ctx
, n
, indexes
);
1923 if (transferOps
& IMAGE_MAP_COLOR_BIT
) {
1924 const GLuint mask
= ctx
->PixelMaps
.ItoI
.Size
- 1;
1926 for (i
= 0; i
< n
; i
++) {
1927 const GLuint j
= indexes
[i
] & mask
;
1928 indexes
[i
] = IROUND(ctx
->PixelMaps
.ItoI
.Map
[j
]);
1935 * Apply stencil index shift, offset and table lookup to an array
1936 * of stencil values.
1939 _mesa_apply_stencil_transfer_ops(const GLcontext
*ctx
, GLuint n
,
1940 GLstencil stencil
[])
1942 if (ctx
->Pixel
.IndexShift
!= 0 || ctx
->Pixel
.IndexOffset
!= 0) {
1943 const GLint offset
= ctx
->Pixel
.IndexOffset
;
1944 GLint shift
= ctx
->Pixel
.IndexShift
;
1947 for (i
= 0; i
< n
; i
++) {
1948 stencil
[i
] = (stencil
[i
] << shift
) + offset
;
1951 else if (shift
< 0) {
1953 for (i
= 0; i
< n
; i
++) {
1954 stencil
[i
] = (stencil
[i
] >> shift
) + offset
;
1958 for (i
= 0; i
< n
; i
++) {
1959 stencil
[i
] = stencil
[i
] + offset
;
1963 if (ctx
->Pixel
.MapStencilFlag
) {
1964 GLuint mask
= ctx
->PixelMaps
.StoS
.Size
- 1;
1966 for (i
= 0; i
< n
; i
++) {
1967 stencil
[i
] = (GLstencil
)ctx
->PixelMaps
.StoS
.Map
[ stencil
[i
] & mask
];
1974 * Used to pack an array [][4] of RGBA float colors as specified
1975 * by the dstFormat, dstType and dstPacking. Used by glReadPixels.
1976 * Note: the rgba values will be modified by this function when any pixel
1977 * transfer ops are enabled.
1980 _mesa_pack_rgba_span_float(GLcontext
*ctx
, GLuint n
, GLfloat rgba
[][4],
1981 GLenum dstFormat
, GLenum dstType
,
1983 const struct gl_pixelstore_attrib
*dstPacking
,
1984 GLbitfield transferOps
)
1986 GLfloat luminance
[MAX_WIDTH
];
1987 const GLint comps
= _mesa_components_in_format(dstFormat
);
1991 * This test should probably go away. Have the caller set/clear the
1992 * IMAGE_CLAMP_BIT as needed.
1994 if (dstType
!= GL_FLOAT
|| ctx
->Color
.ClampReadColor
== GL_TRUE
) {
1995 /* need to clamp to [0, 1] */
1996 transferOps
|= IMAGE_CLAMP_BIT
;
2000 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, n
, rgba
);
2003 if (dstFormat
== GL_LUMINANCE
|| dstFormat
== GL_LUMINANCE_ALPHA
) {
2004 /* compute luminance values */
2005 if (transferOps
& IMAGE_CLAMP_BIT
) {
2006 for (i
= 0; i
< n
; i
++) {
2007 GLfloat sum
= rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
2008 luminance
[i
] = CLAMP(sum
, 0.0F
, 1.0F
);
2012 for (i
= 0; i
< n
; i
++) {
2013 luminance
[i
] = rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
2019 * Pack/store the pixels. Ugh! Lots of cases!!!
2022 case GL_UNSIGNED_BYTE
:
2024 GLubyte
*dst
= (GLubyte
*) dstAddr
;
2025 switch (dstFormat
) {
2028 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2032 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2036 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2040 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2044 dst
[i
] = FLOAT_TO_UBYTE(luminance
[i
]);
2046 case GL_LUMINANCE_ALPHA
:
2048 dst
[i
*2+0] = FLOAT_TO_UBYTE(luminance
[i
]);
2049 dst
[i
*2+1] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2054 dst
[i
*3+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2055 dst
[i
*3+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2056 dst
[i
*3+2] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2061 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2062 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2063 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2064 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2069 dst
[i
*3+0] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2070 dst
[i
*3+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2071 dst
[i
*3+2] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2076 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2077 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2078 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2079 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2084 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2085 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2086 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2087 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2093 dst
[i
*2+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2094 dst
[i
*2+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2098 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2104 GLbyte
*dst
= (GLbyte
*) dstAddr
;
2105 switch (dstFormat
) {
2108 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2112 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2116 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2120 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2124 dst
[i
] = FLOAT_TO_BYTE(luminance
[i
]);
2126 case GL_LUMINANCE_ALPHA
:
2128 dst
[i
*2+0] = FLOAT_TO_BYTE(luminance
[i
]);
2129 dst
[i
*2+1] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2134 dst
[i
*3+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2135 dst
[i
*3+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2136 dst
[i
*3+2] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2141 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2142 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2143 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2144 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2149 dst
[i
*3+0] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2150 dst
[i
*3+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2151 dst
[i
*3+2] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2156 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2157 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2158 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2159 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2164 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2165 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2166 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2167 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2173 dst
[i
*2+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2174 dst
[i
*2+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2178 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2182 case GL_UNSIGNED_SHORT
:
2184 GLushort
*dst
= (GLushort
*) dstAddr
;
2185 switch (dstFormat
) {
2188 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][RCOMP
]);
2192 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][GCOMP
]);
2196 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][BCOMP
]);
2200 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][ACOMP
]);
2204 UNCLAMPED_FLOAT_TO_USHORT(dst
[i
], luminance
[i
]);
2206 case GL_LUMINANCE_ALPHA
:
2208 UNCLAMPED_FLOAT_TO_USHORT(dst
[i
*2+0], luminance
[i
]);
2209 CLAMPED_FLOAT_TO_USHORT(dst
[i
*2+1], rgba
[i
][ACOMP
]);
2214 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+0], rgba
[i
][RCOMP
]);
2215 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+1], rgba
[i
][GCOMP
]);
2216 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+2], rgba
[i
][BCOMP
]);
2221 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+0], rgba
[i
][RCOMP
]);
2222 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+1], rgba
[i
][GCOMP
]);
2223 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+2], rgba
[i
][BCOMP
]);
2224 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+3], rgba
[i
][ACOMP
]);
2229 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+0], rgba
[i
][BCOMP
]);
2230 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+1], rgba
[i
][GCOMP
]);
2231 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+2], rgba
[i
][RCOMP
]);
2236 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+0], rgba
[i
][BCOMP
]);
2237 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+1], rgba
[i
][GCOMP
]);
2238 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+2], rgba
[i
][RCOMP
]);
2239 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+3], rgba
[i
][ACOMP
]);
2244 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+0], rgba
[i
][ACOMP
]);
2245 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+1], rgba
[i
][BCOMP
]);
2246 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+2], rgba
[i
][GCOMP
]);
2247 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+3], rgba
[i
][RCOMP
]);
2253 dst
[i
*2+0] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
2254 dst
[i
*2+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
2258 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2264 GLshort
*dst
= (GLshort
*) dstAddr
;
2265 switch (dstFormat
) {
2268 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2272 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2276 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2280 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2284 dst
[i
] = FLOAT_TO_SHORT(luminance
[i
]);
2286 case GL_LUMINANCE_ALPHA
:
2288 dst
[i
*2+0] = FLOAT_TO_SHORT(luminance
[i
]);
2289 dst
[i
*2+1] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2294 dst
[i
*3+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2295 dst
[i
*3+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2296 dst
[i
*3+2] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2301 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2302 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2303 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2304 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2309 dst
[i
*3+0] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2310 dst
[i
*3+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2311 dst
[i
*3+2] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2316 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2317 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2318 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2319 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2324 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2325 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2326 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2327 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2333 dst
[i
*2+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2334 dst
[i
*2+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2338 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2342 case GL_UNSIGNED_INT
:
2344 GLuint
*dst
= (GLuint
*) dstAddr
;
2345 switch (dstFormat
) {
2348 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2352 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2356 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2360 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2364 dst
[i
] = FLOAT_TO_UINT(luminance
[i
]);
2366 case GL_LUMINANCE_ALPHA
:
2368 dst
[i
*2+0] = FLOAT_TO_UINT(luminance
[i
]);
2369 dst
[i
*2+1] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2374 dst
[i
*3+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2375 dst
[i
*3+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2376 dst
[i
*3+2] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2381 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2382 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2383 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2384 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2389 dst
[i
*3+0] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2390 dst
[i
*3+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2391 dst
[i
*3+2] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2396 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2397 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2398 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2399 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2404 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2405 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2406 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2407 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2413 dst
[i
*2+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2414 dst
[i
*2+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2418 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2424 GLint
*dst
= (GLint
*) dstAddr
;
2425 switch (dstFormat
) {
2428 dst
[i
] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2432 dst
[i
] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2436 dst
[i
] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2440 dst
[i
] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2444 dst
[i
] = FLOAT_TO_INT(luminance
[i
]);
2446 case GL_LUMINANCE_ALPHA
:
2448 dst
[i
*2+0] = FLOAT_TO_INT(luminance
[i
]);
2449 dst
[i
*2+1] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2454 dst
[i
*3+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2455 dst
[i
*3+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2456 dst
[i
*3+2] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2461 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2462 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2463 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2464 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2469 dst
[i
*3+0] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2470 dst
[i
*3+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2471 dst
[i
*3+2] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2476 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2477 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2478 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2479 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2484 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2485 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2486 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2487 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2493 dst
[i
*2+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2494 dst
[i
*2+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2498 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2504 GLfloat
*dst
= (GLfloat
*) dstAddr
;
2505 switch (dstFormat
) {
2508 dst
[i
] = rgba
[i
][RCOMP
];
2512 dst
[i
] = rgba
[i
][GCOMP
];
2516 dst
[i
] = rgba
[i
][BCOMP
];
2520 dst
[i
] = rgba
[i
][ACOMP
];
2524 dst
[i
] = luminance
[i
];
2526 case GL_LUMINANCE_ALPHA
:
2528 dst
[i
*2+0] = luminance
[i
];
2529 dst
[i
*2+1] = rgba
[i
][ACOMP
];
2534 dst
[i
*3+0] = rgba
[i
][RCOMP
];
2535 dst
[i
*3+1] = rgba
[i
][GCOMP
];
2536 dst
[i
*3+2] = rgba
[i
][BCOMP
];
2541 dst
[i
*4+0] = rgba
[i
][RCOMP
];
2542 dst
[i
*4+1] = rgba
[i
][GCOMP
];
2543 dst
[i
*4+2] = rgba
[i
][BCOMP
];
2544 dst
[i
*4+3] = rgba
[i
][ACOMP
];
2549 dst
[i
*3+0] = rgba
[i
][BCOMP
];
2550 dst
[i
*3+1] = rgba
[i
][GCOMP
];
2551 dst
[i
*3+2] = rgba
[i
][RCOMP
];
2556 dst
[i
*4+0] = rgba
[i
][BCOMP
];
2557 dst
[i
*4+1] = rgba
[i
][GCOMP
];
2558 dst
[i
*4+2] = rgba
[i
][RCOMP
];
2559 dst
[i
*4+3] = rgba
[i
][ACOMP
];
2564 dst
[i
*4+0] = rgba
[i
][ACOMP
];
2565 dst
[i
*4+1] = rgba
[i
][BCOMP
];
2566 dst
[i
*4+2] = rgba
[i
][GCOMP
];
2567 dst
[i
*4+3] = rgba
[i
][RCOMP
];
2573 dst
[i
*2+0] = rgba
[i
][RCOMP
];
2574 dst
[i
*2+1] = rgba
[i
][GCOMP
];
2578 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2582 case GL_HALF_FLOAT_ARB
:
2584 GLhalfARB
*dst
= (GLhalfARB
*) dstAddr
;
2585 switch (dstFormat
) {
2588 dst
[i
] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2592 dst
[i
] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2596 dst
[i
] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2600 dst
[i
] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2604 dst
[i
] = _mesa_float_to_half(luminance
[i
]);
2606 case GL_LUMINANCE_ALPHA
:
2608 dst
[i
*2+0] = _mesa_float_to_half(luminance
[i
]);
2609 dst
[i
*2+1] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2614 dst
[i
*3+0] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2615 dst
[i
*3+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2616 dst
[i
*3+2] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2621 dst
[i
*4+0] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2622 dst
[i
*4+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2623 dst
[i
*4+2] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2624 dst
[i
*4+3] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2629 dst
[i
*3+0] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2630 dst
[i
*3+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2631 dst
[i
*3+2] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2636 dst
[i
*4+0] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2637 dst
[i
*4+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2638 dst
[i
*4+2] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2639 dst
[i
*4+3] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2644 dst
[i
*4+0] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2645 dst
[i
*4+1] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2646 dst
[i
*4+2] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2647 dst
[i
*4+3] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2653 dst
[i
*2+0] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2654 dst
[i
*2+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2658 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2662 case GL_UNSIGNED_BYTE_3_3_2
:
2663 if (dstFormat
== GL_RGB
) {
2664 GLubyte
*dst
= (GLubyte
*) dstAddr
;
2666 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 7.0F
) << 5)
2667 | (IROUND(rgba
[i
][GCOMP
] * 7.0F
) << 2)
2668 | (IROUND(rgba
[i
][BCOMP
] * 3.0F
) );
2672 case GL_UNSIGNED_BYTE_2_3_3_REV
:
2673 if (dstFormat
== GL_RGB
) {
2674 GLubyte
*dst
= (GLubyte
*) dstAddr
;
2676 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 7.0F
) )
2677 | (IROUND(rgba
[i
][GCOMP
] * 7.0F
) << 3)
2678 | (IROUND(rgba
[i
][BCOMP
] * 3.0F
) << 6);
2682 case GL_UNSIGNED_SHORT_5_6_5
:
2683 if (dstFormat
== GL_RGB
) {
2684 GLushort
*dst
= (GLushort
*) dstAddr
;
2686 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 11)
2687 | (IROUND(rgba
[i
][GCOMP
] * 63.0F
) << 5)
2688 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) );
2692 case GL_UNSIGNED_SHORT_5_6_5_REV
:
2693 if (dstFormat
== GL_RGB
) {
2694 GLushort
*dst
= (GLushort
*) dstAddr
;
2696 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) )
2697 | (IROUND(rgba
[i
][GCOMP
] * 63.0F
) << 5)
2698 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 11);
2702 case GL_UNSIGNED_SHORT_4_4_4_4
:
2703 if (dstFormat
== GL_RGBA
) {
2704 GLushort
*dst
= (GLushort
*) dstAddr
;
2706 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 12)
2707 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 8)
2708 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 4)
2709 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) );
2712 else if (dstFormat
== GL_BGRA
) {
2713 GLushort
*dst
= (GLushort
*) dstAddr
;
2715 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 12)
2716 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 8)
2717 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 4)
2718 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) );
2721 else if (dstFormat
== GL_ABGR_EXT
) {
2722 GLushort
*dst
= (GLushort
*) dstAddr
;
2724 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 15.0F
) << 12)
2725 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 8)
2726 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 4)
2727 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) );
2731 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
2732 if (dstFormat
== GL_RGBA
) {
2733 GLushort
*dst
= (GLushort
*) dstAddr
;
2735 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 15.0F
) )
2736 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 4)
2737 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 8)
2738 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) << 12);
2741 else if (dstFormat
== GL_BGRA
) {
2742 GLushort
*dst
= (GLushort
*) dstAddr
;
2744 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 15.0F
) )
2745 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 4)
2746 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 8)
2747 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) << 12);
2750 else if (dstFormat
== GL_ABGR_EXT
) {
2751 GLushort
*dst
= (GLushort
*) dstAddr
;
2753 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 15.0F
) )
2754 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 4)
2755 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 8)
2756 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 12);
2760 case GL_UNSIGNED_SHORT_5_5_5_1
:
2761 if (dstFormat
== GL_RGBA
) {
2762 GLushort
*dst
= (GLushort
*) dstAddr
;
2764 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 11)
2765 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 6)
2766 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 1)
2767 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) );
2770 else if (dstFormat
== GL_BGRA
) {
2771 GLushort
*dst
= (GLushort
*) dstAddr
;
2773 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 11)
2774 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 6)
2775 | (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 1)
2776 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) );
2779 else if (dstFormat
== GL_ABGR_EXT
) {
2780 GLushort
*dst
= (GLushort
*) dstAddr
;
2782 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 31.0F
) << 11)
2783 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 6)
2784 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 1)
2785 | (IROUND(rgba
[i
][RCOMP
] * 1.0F
) );
2789 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
2790 if (dstFormat
== GL_RGBA
) {
2791 GLushort
*dst
= (GLushort
*) dstAddr
;
2793 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) )
2794 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 5)
2795 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 10)
2796 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) << 15);
2799 else if (dstFormat
== GL_BGRA
) {
2800 GLushort
*dst
= (GLushort
*) dstAddr
;
2802 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 31.0F
) )
2803 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 5)
2804 | (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 10)
2805 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) << 15);
2808 else if (dstFormat
== GL_ABGR_EXT
) {
2809 GLushort
*dst
= (GLushort
*) dstAddr
;
2811 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 31.0F
) )
2812 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 5)
2813 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 10)
2814 | (IROUND(rgba
[i
][RCOMP
] * 1.0F
) << 15);
2818 case GL_UNSIGNED_INT_8_8_8_8
:
2819 if (dstFormat
== GL_RGBA
) {
2820 GLuint
*dst
= (GLuint
*) dstAddr
;
2822 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 255.F
) << 24)
2823 | (IROUND(rgba
[i
][GCOMP
] * 255.F
) << 16)
2824 | (IROUND(rgba
[i
][BCOMP
] * 255.F
) << 8)
2825 | (IROUND(rgba
[i
][ACOMP
] * 255.F
) );
2828 else if (dstFormat
== GL_BGRA
) {
2829 GLuint
*dst
= (GLuint
*) dstAddr
;
2831 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 255.F
) << 24)
2832 | (IROUND(rgba
[i
][GCOMP
] * 255.F
) << 16)
2833 | (IROUND(rgba
[i
][RCOMP
] * 255.F
) << 8)
2834 | (IROUND(rgba
[i
][ACOMP
] * 255.F
) );
2837 else if (dstFormat
== GL_ABGR_EXT
) {
2838 GLuint
*dst
= (GLuint
*) dstAddr
;
2840 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 255.F
) << 24)
2841 | (IROUND(rgba
[i
][BCOMP
] * 255.F
) << 16)
2842 | (IROUND(rgba
[i
][GCOMP
] * 255.F
) << 8)
2843 | (IROUND(rgba
[i
][RCOMP
] * 255.F
) );
2847 case GL_UNSIGNED_INT_8_8_8_8_REV
:
2848 if (dstFormat
== GL_RGBA
) {
2849 GLuint
*dst
= (GLuint
*) dstAddr
;
2851 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 255.0F
) )
2852 | (IROUND(rgba
[i
][GCOMP
] * 255.0F
) << 8)
2853 | (IROUND(rgba
[i
][BCOMP
] * 255.0F
) << 16)
2854 | (IROUND(rgba
[i
][ACOMP
] * 255.0F
) << 24);
2857 else if (dstFormat
== GL_BGRA
) {
2858 GLuint
*dst
= (GLuint
*) dstAddr
;
2860 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 255.0F
) )
2861 | (IROUND(rgba
[i
][GCOMP
] * 255.0F
) << 8)
2862 | (IROUND(rgba
[i
][RCOMP
] * 255.0F
) << 16)
2863 | (IROUND(rgba
[i
][ACOMP
] * 255.0F
) << 24);
2866 else if (dstFormat
== GL_ABGR_EXT
) {
2867 GLuint
*dst
= (GLuint
*) dstAddr
;
2869 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 255.0F
) )
2870 | (IROUND(rgba
[i
][BCOMP
] * 255.0F
) << 8)
2871 | (IROUND(rgba
[i
][GCOMP
] * 255.0F
) << 16)
2872 | (IROUND(rgba
[i
][RCOMP
] * 255.0F
) << 24);
2876 case GL_UNSIGNED_INT_10_10_10_2
:
2877 if (dstFormat
== GL_RGBA
) {
2878 GLuint
*dst
= (GLuint
*) dstAddr
;
2880 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) << 22)
2881 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 12)
2882 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 2)
2883 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) );
2886 else if (dstFormat
== GL_BGRA
) {
2887 GLuint
*dst
= (GLuint
*) dstAddr
;
2889 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 22)
2890 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 12)
2891 | (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) << 2)
2892 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) );
2895 else if (dstFormat
== GL_ABGR_EXT
) {
2896 GLuint
*dst
= (GLuint
*) dstAddr
;
2898 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 1023.0F
) << 22)
2899 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 12)
2900 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 2)
2901 | (IROUND(rgba
[i
][RCOMP
] * 3.0F
) );
2905 case GL_UNSIGNED_INT_2_10_10_10_REV
:
2906 if (dstFormat
== GL_RGBA
) {
2907 GLuint
*dst
= (GLuint
*) dstAddr
;
2909 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) )
2910 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 10)
2911 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 20)
2912 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) << 30);
2915 else if (dstFormat
== GL_BGRA
) {
2916 GLuint
*dst
= (GLuint
*) dstAddr
;
2918 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) )
2919 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 10)
2920 | (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) << 20)
2921 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) << 30);
2924 else if (dstFormat
== GL_ABGR_EXT
) {
2925 GLuint
*dst
= (GLuint
*) dstAddr
;
2927 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 1023.0F
) )
2928 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 10)
2929 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 20)
2930 | (IROUND(rgba
[i
][RCOMP
] * 3.0F
) << 30);
2935 _mesa_problem(ctx
, "bad type in _mesa_pack_rgba_span_float");
2939 if (dstPacking
->SwapBytes
) {
2940 GLint swapSize
= _mesa_sizeof_packed_type(dstType
);
2941 if (swapSize
== 2) {
2942 if (dstPacking
->SwapBytes
) {
2943 _mesa_swap2((GLushort
*) dstAddr
, n
* comps
);
2946 else if (swapSize
== 4) {
2947 if (dstPacking
->SwapBytes
) {
2948 _mesa_swap4((GLuint
*) dstAddr
, n
* comps
);
2955 #define SWAP2BYTE(VALUE) \
2957 GLubyte *bytes = (GLubyte *) &(VALUE); \
2958 GLubyte tmp = bytes[0]; \
2959 bytes[0] = bytes[1]; \
2963 #define SWAP4BYTE(VALUE) \
2965 GLubyte *bytes = (GLubyte *) &(VALUE); \
2966 GLubyte tmp = bytes[0]; \
2967 bytes[0] = bytes[3]; \
2970 bytes[1] = bytes[2]; \
2976 extract_uint_indexes(GLuint n
, GLuint indexes
[],
2977 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
2978 const struct gl_pixelstore_attrib
*unpack
)
2980 ASSERT(srcFormat
== GL_COLOR_INDEX
|| srcFormat
== GL_STENCIL_INDEX
);
2982 ASSERT(srcType
== GL_BITMAP
||
2983 srcType
== GL_UNSIGNED_BYTE
||
2984 srcType
== GL_BYTE
||
2985 srcType
== GL_UNSIGNED_SHORT
||
2986 srcType
== GL_SHORT
||
2987 srcType
== GL_UNSIGNED_INT
||
2988 srcType
== GL_INT
||
2989 srcType
== GL_UNSIGNED_INT_24_8_EXT
||
2990 srcType
== GL_HALF_FLOAT_ARB
||
2991 srcType
== GL_FLOAT
);
2996 GLubyte
*ubsrc
= (GLubyte
*) src
;
2997 if (unpack
->LsbFirst
) {
2998 GLubyte mask
= 1 << (unpack
->SkipPixels
& 0x7);
3000 for (i
= 0; i
< n
; i
++) {
3001 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
3012 GLubyte mask
= 128 >> (unpack
->SkipPixels
& 0x7);
3014 for (i
= 0; i
< n
; i
++) {
3015 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
3027 case GL_UNSIGNED_BYTE
:
3030 const GLubyte
*s
= (const GLubyte
*) src
;
3031 for (i
= 0; i
< n
; i
++)
3038 const GLbyte
*s
= (const GLbyte
*) src
;
3039 for (i
= 0; i
< n
; i
++)
3043 case GL_UNSIGNED_SHORT
:
3046 const GLushort
*s
= (const GLushort
*) src
;
3047 if (unpack
->SwapBytes
) {
3048 for (i
= 0; i
< n
; i
++) {
3049 GLushort value
= s
[i
];
3055 for (i
= 0; i
< n
; i
++)
3063 const GLshort
*s
= (const GLshort
*) src
;
3064 if (unpack
->SwapBytes
) {
3065 for (i
= 0; i
< n
; i
++) {
3066 GLshort value
= s
[i
];
3072 for (i
= 0; i
< n
; i
++)
3077 case GL_UNSIGNED_INT
:
3080 const GLuint
*s
= (const GLuint
*) src
;
3081 if (unpack
->SwapBytes
) {
3082 for (i
= 0; i
< n
; i
++) {
3083 GLuint value
= s
[i
];
3089 for (i
= 0; i
< n
; i
++)
3097 const GLint
*s
= (const GLint
*) src
;
3098 if (unpack
->SwapBytes
) {
3099 for (i
= 0; i
< n
; i
++) {
3106 for (i
= 0; i
< n
; i
++)
3114 const GLfloat
*s
= (const GLfloat
*) src
;
3115 if (unpack
->SwapBytes
) {
3116 for (i
= 0; i
< n
; i
++) {
3117 GLfloat value
= s
[i
];
3119 indexes
[i
] = (GLuint
) value
;
3123 for (i
= 0; i
< n
; i
++)
3124 indexes
[i
] = (GLuint
) s
[i
];
3128 case GL_HALF_FLOAT_ARB
:
3131 const GLhalfARB
*s
= (const GLhalfARB
*) src
;
3132 if (unpack
->SwapBytes
) {
3133 for (i
= 0; i
< n
; i
++) {
3134 GLhalfARB value
= s
[i
];
3136 indexes
[i
] = (GLuint
) _mesa_half_to_float(value
);
3140 for (i
= 0; i
< n
; i
++)
3141 indexes
[i
] = (GLuint
) _mesa_half_to_float(s
[i
]);
3145 case GL_UNSIGNED_INT_24_8_EXT
:
3148 const GLuint
*s
= (const GLuint
*) src
;
3149 if (unpack
->SwapBytes
) {
3150 for (i
= 0; i
< n
; i
++) {
3151 GLuint value
= s
[i
];
3153 indexes
[i
] = value
& 0xff; /* lower 8 bits */
3157 for (i
= 0; i
< n
; i
++)
3158 indexes
[i
] = s
[i
] & 0xff; /* lower 8 bits */
3164 _mesa_problem(NULL
, "bad srcType in extract_uint_indexes");
3171 * This function extracts floating point RGBA values from arbitrary
3172 * image data. srcFormat and srcType are the format and type parameters
3173 * passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
3175 * Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
3176 * implements the "Conversion to floating point", "Conversion to RGB",
3177 * and "Final Expansion to RGBA" operations.
3179 * Args: n - number of pixels
3180 * rgba - output colors
3181 * srcFormat - format of incoming data
3182 * srcType - data type of incoming data
3183 * src - source data pointer
3184 * swapBytes - perform byteswapping of incoming data?
3187 extract_float_rgba(GLuint n
, GLfloat rgba
[][4],
3188 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
3189 GLboolean swapBytes
)
3191 GLint redIndex
, greenIndex
, blueIndex
, alphaIndex
;
3193 GLint rComp
, bComp
, gComp
, aComp
;
3194 GLboolean intFormat
;
3195 GLfloat rs
= 1.0f
, gs
= 1.0f
, bs
= 1.0f
, as
= 1.0f
; /* scale factors */
3197 ASSERT(srcFormat
== GL_RED
||
3198 srcFormat
== GL_GREEN
||
3199 srcFormat
== GL_BLUE
||
3200 srcFormat
== GL_ALPHA
||
3201 srcFormat
== GL_LUMINANCE
||
3202 srcFormat
== GL_LUMINANCE_ALPHA
||
3203 srcFormat
== GL_INTENSITY
||
3204 srcFormat
== GL_RGB
||
3205 srcFormat
== GL_BGR
||
3206 srcFormat
== GL_RGBA
||
3207 srcFormat
== GL_BGRA
||
3208 srcFormat
== GL_ABGR_EXT
||
3209 srcFormat
== GL_DU8DV8_ATI
||
3210 srcFormat
== GL_DUDV_ATI
||
3211 srcFormat
== GL_RED_INTEGER_EXT
||
3212 srcFormat
== GL_GREEN_INTEGER_EXT
||
3213 srcFormat
== GL_BLUE_INTEGER_EXT
||
3214 srcFormat
== GL_ALPHA_INTEGER_EXT
||
3215 srcFormat
== GL_RGB_INTEGER_EXT
||
3216 srcFormat
== GL_RGBA_INTEGER_EXT
||
3217 srcFormat
== GL_BGR_INTEGER_EXT
||
3218 srcFormat
== GL_BGRA_INTEGER_EXT
||
3219 srcFormat
== GL_LUMINANCE_INTEGER_EXT
||
3220 srcFormat
== GL_LUMINANCE_ALPHA_INTEGER_EXT
);
3222 ASSERT(srcType
== GL_UNSIGNED_BYTE
||
3223 srcType
== GL_BYTE
||
3224 srcType
== GL_UNSIGNED_SHORT
||
3225 srcType
== GL_SHORT
||
3226 srcType
== GL_UNSIGNED_INT
||
3227 srcType
== GL_INT
||
3228 srcType
== GL_HALF_FLOAT_ARB
||
3229 srcType
== GL_FLOAT
||
3230 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
3231 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
3232 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
3233 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
3234 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
3235 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
3236 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
3237 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
3238 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
3239 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
3240 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
3241 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
3243 rComp
= gComp
= bComp
= aComp
= -1;
3245 switch (srcFormat
) {
3247 case GL_RED_INTEGER_EXT
:
3249 greenIndex
= blueIndex
= alphaIndex
= -1;
3253 case GL_GREEN_INTEGER_EXT
:
3255 redIndex
= blueIndex
= alphaIndex
= -1;
3259 case GL_BLUE_INTEGER_EXT
:
3261 redIndex
= greenIndex
= alphaIndex
= -1;
3265 case GL_ALPHA_INTEGER_EXT
:
3266 redIndex
= greenIndex
= blueIndex
= -1;
3271 case GL_LUMINANCE_INTEGER_EXT
:
3272 redIndex
= greenIndex
= blueIndex
= 0;
3276 case GL_LUMINANCE_ALPHA
:
3277 case GL_LUMINANCE_ALPHA_INTEGER_EXT
:
3278 redIndex
= greenIndex
= blueIndex
= 0;
3283 redIndex
= greenIndex
= blueIndex
= alphaIndex
= 0;
3287 case GL_RGB_INTEGER
:
3310 case GL_RGBA_INTEGER
:
3352 _mesa_problem(NULL
, "bad srcFormat %s in extract float data",
3353 _mesa_lookup_enum_by_nr(srcFormat
));
3357 intFormat
= _mesa_is_integer_format(srcFormat
);
3359 #define PROCESS(INDEX, CHANNEL, DEFAULT, DEFAULT_INT, TYPE, CONVERSION) \
3360 if ((INDEX) < 0) { \
3363 for (i = 0; i < n; i++) { \
3364 rgba[i][CHANNEL] = DEFAULT_INT; \
3368 for (i = 0; i < n; i++) { \
3369 rgba[i][CHANNEL] = DEFAULT; \
3373 else if (swapBytes) { \
3374 const TYPE *s = (const TYPE *) src; \
3376 for (i = 0; i < n; i++) { \
3377 TYPE value = s[INDEX]; \
3378 if (sizeof(TYPE) == 2) { \
3381 else if (sizeof(TYPE) == 4) { \
3385 rgba[i][CHANNEL] = (GLfloat) value; \
3387 rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
3392 const TYPE *s = (const TYPE *) src; \
3395 for (i = 0; i < n; i++) { \
3396 rgba[i][CHANNEL] = (GLfloat) s[INDEX]; \
3401 for (i = 0; i < n; i++) { \
3402 rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
3409 case GL_UNSIGNED_BYTE
:
3410 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLubyte
, UBYTE_TO_FLOAT
);
3411 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLubyte
, UBYTE_TO_FLOAT
);
3412 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLubyte
, UBYTE_TO_FLOAT
);
3413 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 255, GLubyte
, UBYTE_TO_FLOAT
);
3416 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLbyte
, BYTE_TO_FLOAT
);
3417 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLbyte
, BYTE_TO_FLOAT
);
3418 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLbyte
, BYTE_TO_FLOAT
);
3419 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 127, GLbyte
, BYTE_TO_FLOAT
);
3421 case GL_UNSIGNED_SHORT
:
3422 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLushort
, USHORT_TO_FLOAT
);
3423 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLushort
, USHORT_TO_FLOAT
);
3424 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLushort
, USHORT_TO_FLOAT
);
3425 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 0xffff, GLushort
, USHORT_TO_FLOAT
);
3428 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLshort
, SHORT_TO_FLOAT
);
3429 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLshort
, SHORT_TO_FLOAT
);
3430 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLshort
, SHORT_TO_FLOAT
);
3431 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 32767, GLshort
, SHORT_TO_FLOAT
);
3433 case GL_UNSIGNED_INT
:
3434 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLuint
, UINT_TO_FLOAT
);
3435 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLuint
, UINT_TO_FLOAT
);
3436 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLuint
, UINT_TO_FLOAT
);
3437 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 0xffffffff, GLuint
, UINT_TO_FLOAT
);
3440 PROCESS(redIndex
, RCOMP
, 0.0F
, 0, GLint
, INT_TO_FLOAT
);
3441 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0, GLint
, INT_TO_FLOAT
);
3442 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0, GLint
, INT_TO_FLOAT
);
3443 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 2147483647, GLint
, INT_TO_FLOAT
);
3446 PROCESS(redIndex
, RCOMP
, 0.0F
, 0.0F
, GLfloat
, (GLfloat
));
3447 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0.0F
, GLfloat
, (GLfloat
));
3448 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0.0F
, GLfloat
, (GLfloat
));
3449 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 1.0F
, GLfloat
, (GLfloat
));
3451 case GL_HALF_FLOAT_ARB
:
3452 PROCESS(redIndex
, RCOMP
, 0.0F
, 0.0F
, GLhalfARB
, _mesa_half_to_float
);
3453 PROCESS(greenIndex
, GCOMP
, 0.0F
, 0.0F
, GLhalfARB
, _mesa_half_to_float
);
3454 PROCESS(blueIndex
, BCOMP
, 0.0F
, 0.0F
, GLhalfARB
, _mesa_half_to_float
);
3455 PROCESS(alphaIndex
, ACOMP
, 1.0F
, 1.0F
, GLhalfARB
, _mesa_half_to_float
);
3457 case GL_UNSIGNED_BYTE_3_3_2
:
3459 const GLubyte
*ubsrc
= (const GLubyte
*) src
;
3466 for (i
= 0; i
< n
; i
++) {
3467 GLubyte p
= ubsrc
[i
];
3468 rgba
[i
][rComp
] = ((p
>> 5) ) * rs
;
3469 rgba
[i
][gComp
] = ((p
>> 2) & 0x7) * gs
;
3470 rgba
[i
][bComp
] = ((p
) & 0x3) * bs
;
3471 rgba
[i
][aComp
] = 1.0F
;
3475 case GL_UNSIGNED_BYTE_2_3_3_REV
:
3477 const GLubyte
*ubsrc
= (const GLubyte
*) src
;
3484 for (i
= 0; i
< n
; i
++) {
3485 GLubyte p
= ubsrc
[i
];
3486 rgba
[i
][rComp
] = ((p
) & 0x7) * rs
;
3487 rgba
[i
][gComp
] = ((p
>> 3) & 0x7) * gs
;
3488 rgba
[i
][bComp
] = ((p
>> 6) ) * bs
;
3489 rgba
[i
][aComp
] = 1.0F
;
3493 case GL_UNSIGNED_SHORT_5_6_5
:
3500 const GLushort
*ussrc
= (const GLushort
*) src
;
3502 for (i
= 0; i
< n
; i
++) {
3503 GLushort p
= ussrc
[i
];
3505 rgba
[i
][rComp
] = ((p
>> 11) ) * rs
;
3506 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * gs
;
3507 rgba
[i
][bComp
] = ((p
) & 0x1f) * bs
;
3508 rgba
[i
][aComp
] = 1.0F
;
3512 const GLushort
*ussrc
= (const GLushort
*) src
;
3514 for (i
= 0; i
< n
; i
++) {
3515 GLushort p
= ussrc
[i
];
3516 rgba
[i
][rComp
] = ((p
>> 11) ) * rs
;
3517 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * gs
;
3518 rgba
[i
][bComp
] = ((p
) & 0x1f) * bs
;
3519 rgba
[i
][aComp
] = 1.0F
;
3523 case GL_UNSIGNED_SHORT_5_6_5_REV
:
3530 const GLushort
*ussrc
= (const GLushort
*) src
;
3532 for (i
= 0; i
< n
; i
++) {
3533 GLushort p
= ussrc
[i
];
3535 rgba
[i
][rComp
] = ((p
) & 0x1f) * rs
;
3536 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * gs
;
3537 rgba
[i
][bComp
] = ((p
>> 11) ) * bs
;
3538 rgba
[i
][aComp
] = 1.0F
;
3542 const GLushort
*ussrc
= (const GLushort
*) src
;
3544 for (i
= 0; i
< n
; i
++) {
3545 GLushort p
= ussrc
[i
];
3546 rgba
[i
][rComp
] = ((p
) & 0x1f) * rs
;
3547 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * gs
;
3548 rgba
[i
][bComp
] = ((p
>> 11) ) * bs
;
3549 rgba
[i
][aComp
] = 1.0F
;
3553 case GL_UNSIGNED_SHORT_4_4_4_4
:
3555 rs
= gs
= bs
= as
= 1.0F
/ 15.0F
;
3558 const GLushort
*ussrc
= (const GLushort
*) src
;
3560 for (i
= 0; i
< n
; i
++) {
3561 GLushort p
= ussrc
[i
];
3563 rgba
[i
][rComp
] = ((p
>> 12) ) * rs
;
3564 rgba
[i
][gComp
] = ((p
>> 8) & 0xf) * gs
;
3565 rgba
[i
][bComp
] = ((p
>> 4) & 0xf) * bs
;
3566 rgba
[i
][aComp
] = ((p
) & 0xf) * as
;
3570 const GLushort
*ussrc
= (const GLushort
*) src
;
3572 for (i
= 0; i
< n
; i
++) {
3573 GLushort p
= ussrc
[i
];
3574 rgba
[i
][rComp
] = ((p
>> 12) ) * rs
;
3575 rgba
[i
][gComp
] = ((p
>> 8) & 0xf) * gs
;
3576 rgba
[i
][bComp
] = ((p
>> 4) & 0xf) * bs
;
3577 rgba
[i
][aComp
] = ((p
) & 0xf) * as
;
3581 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
3583 rs
= gs
= bs
= as
= 1.0F
/ 15.0F
;
3586 const GLushort
*ussrc
= (const GLushort
*) src
;
3588 for (i
= 0; i
< n
; i
++) {
3589 GLushort p
= ussrc
[i
];
3591 rgba
[i
][rComp
] = ((p
) & 0xf) * rs
;
3592 rgba
[i
][gComp
] = ((p
>> 4) & 0xf) * gs
;
3593 rgba
[i
][bComp
] = ((p
>> 8) & 0xf) * bs
;
3594 rgba
[i
][aComp
] = ((p
>> 12) ) * as
;
3598 const GLushort
*ussrc
= (const GLushort
*) src
;
3600 for (i
= 0; i
< n
; i
++) {
3601 GLushort p
= ussrc
[i
];
3602 rgba
[i
][rComp
] = ((p
) & 0xf) * rs
;
3603 rgba
[i
][gComp
] = ((p
>> 4) & 0xf) * gs
;
3604 rgba
[i
][bComp
] = ((p
>> 8) & 0xf) * bs
;
3605 rgba
[i
][aComp
] = ((p
>> 12) ) * as
;
3609 case GL_UNSIGNED_SHORT_5_5_5_1
:
3611 rs
= gs
= bs
= 1.0F
/ 31.0F
;
3614 const GLushort
*ussrc
= (const GLushort
*) src
;
3616 for (i
= 0; i
< n
; i
++) {
3617 GLushort p
= ussrc
[i
];
3619 rgba
[i
][rComp
] = ((p
>> 11) ) * rs
;
3620 rgba
[i
][gComp
] = ((p
>> 6) & 0x1f) * gs
;
3621 rgba
[i
][bComp
] = ((p
>> 1) & 0x1f) * bs
;
3622 rgba
[i
][aComp
] = ((p
) & 0x1) * as
;
3626 const GLushort
*ussrc
= (const GLushort
*) src
;
3628 for (i
= 0; i
< n
; i
++) {
3629 GLushort p
= ussrc
[i
];
3630 rgba
[i
][rComp
] = ((p
>> 11) ) * rs
;
3631 rgba
[i
][gComp
] = ((p
>> 6) & 0x1f) * gs
;
3632 rgba
[i
][bComp
] = ((p
>> 1) & 0x1f) * bs
;
3633 rgba
[i
][aComp
] = ((p
) & 0x1) * as
;
3637 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
3639 rs
= gs
= bs
= 1.0F
/ 31.0F
;
3642 const GLushort
*ussrc
= (const GLushort
*) src
;
3644 for (i
= 0; i
< n
; i
++) {
3645 GLushort p
= ussrc
[i
];
3647 rgba
[i
][rComp
] = ((p
) & 0x1f) * rs
;
3648 rgba
[i
][gComp
] = ((p
>> 5) & 0x1f) * gs
;
3649 rgba
[i
][bComp
] = ((p
>> 10) & 0x1f) * bs
;
3650 rgba
[i
][aComp
] = ((p
>> 15) ) * as
;
3654 const GLushort
*ussrc
= (const GLushort
*) src
;
3656 for (i
= 0; i
< n
; i
++) {
3657 GLushort p
= ussrc
[i
];
3658 rgba
[i
][rComp
] = ((p
) & 0x1f) * rs
;
3659 rgba
[i
][gComp
] = ((p
>> 5) & 0x1f) * gs
;
3660 rgba
[i
][bComp
] = ((p
>> 10) & 0x1f) * bs
;
3661 rgba
[i
][aComp
] = ((p
>> 15) ) * as
;
3665 case GL_UNSIGNED_INT_8_8_8_8
:
3667 const GLuint
*uisrc
= (const GLuint
*) src
;
3670 for (i
= 0; i
< n
; i
++) {
3671 GLuint p
= uisrc
[i
];
3672 rgba
[i
][rComp
] = (GLfloat
) ((p
) & 0xff);
3673 rgba
[i
][gComp
] = (GLfloat
) ((p
>> 8) & 0xff);
3674 rgba
[i
][bComp
] = (GLfloat
) ((p
>> 16) & 0xff);
3675 rgba
[i
][aComp
] = (GLfloat
) ((p
>> 24) );
3679 for (i
= 0; i
< n
; i
++) {
3680 GLuint p
= uisrc
[i
];
3681 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3682 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3683 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3684 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3689 const GLuint
*uisrc
= (const GLuint
*) src
;
3692 for (i
= 0; i
< n
; i
++) {
3693 GLuint p
= uisrc
[i
];
3694 rgba
[i
][rComp
] = (GLfloat
) ((p
>> 24) );
3695 rgba
[i
][gComp
] = (GLfloat
) ((p
>> 16) & 0xff);
3696 rgba
[i
][bComp
] = (GLfloat
) ((p
>> 8) & 0xff);
3697 rgba
[i
][aComp
] = (GLfloat
) ((p
) & 0xff);
3701 for (i
= 0; i
< n
; i
++) {
3702 GLuint p
= uisrc
[i
];
3703 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3704 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3705 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3706 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3711 case GL_UNSIGNED_INT_8_8_8_8_REV
:
3713 const GLuint
*uisrc
= (const GLuint
*) src
;
3716 for (i
= 0; i
< n
; i
++) {
3717 GLuint p
= uisrc
[i
];
3718 rgba
[i
][rComp
] = (GLfloat
) ((p
>> 24) );
3719 rgba
[i
][gComp
] = (GLfloat
) ((p
>> 16) & 0xff);
3720 rgba
[i
][bComp
] = (GLfloat
) ((p
>> 8) & 0xff);
3721 rgba
[i
][aComp
] = (GLfloat
) ((p
) & 0xff);
3725 for (i
= 0; i
< n
; i
++) {
3726 GLuint p
= uisrc
[i
];
3727 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3728 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3729 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3730 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3735 const GLuint
*uisrc
= (const GLuint
*) src
;
3738 for (i
= 0; i
< n
; i
++) {
3739 GLuint p
= uisrc
[i
];
3740 rgba
[i
][rComp
] = (GLfloat
) ((p
) & 0xff);
3741 rgba
[i
][gComp
] = (GLfloat
) ((p
>> 8) & 0xff);
3742 rgba
[i
][bComp
] = (GLfloat
) ((p
>> 16) & 0xff);
3743 rgba
[i
][aComp
] = (GLfloat
) ((p
>> 24) );
3747 for (i
= 0; i
< n
; i
++) {
3748 GLuint p
= uisrc
[i
];
3749 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3750 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3751 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3752 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3757 case GL_UNSIGNED_INT_10_10_10_2
:
3759 rs
= 1.0F
/ 1023.0F
;
3760 gs
= 1.0F
/ 1023.0F
;
3761 bs
= 1.0F
/ 1023.0F
;
3765 const GLuint
*uisrc
= (const GLuint
*) src
;
3767 for (i
= 0; i
< n
; i
++) {
3768 GLuint p
= uisrc
[i
];
3770 rgba
[i
][rComp
] = ((p
>> 22) ) * rs
;
3771 rgba
[i
][gComp
] = ((p
>> 12) & 0x3ff) * gs
;
3772 rgba
[i
][bComp
] = ((p
>> 2) & 0x3ff) * bs
;
3773 rgba
[i
][aComp
] = ((p
) & 0x3 ) * as
;
3777 const GLuint
*uisrc
= (const GLuint
*) src
;
3779 for (i
= 0; i
< n
; i
++) {
3780 GLuint p
= uisrc
[i
];
3781 rgba
[i
][rComp
] = ((p
>> 22) ) * rs
;
3782 rgba
[i
][gComp
] = ((p
>> 12) & 0x3ff) * gs
;
3783 rgba
[i
][bComp
] = ((p
>> 2) & 0x3ff) * bs
;
3784 rgba
[i
][aComp
] = ((p
) & 0x3 ) * as
;
3788 case GL_UNSIGNED_INT_2_10_10_10_REV
:
3790 rs
= 1.0F
/ 1023.0F
;
3791 gs
= 1.0F
/ 1023.0F
;
3792 bs
= 1.0F
/ 1023.0F
;
3796 const GLuint
*uisrc
= (const GLuint
*) src
;
3798 for (i
= 0; i
< n
; i
++) {
3799 GLuint p
= uisrc
[i
];
3801 rgba
[i
][rComp
] = ((p
) & 0x3ff) * rs
;
3802 rgba
[i
][gComp
] = ((p
>> 10) & 0x3ff) * gs
;
3803 rgba
[i
][bComp
] = ((p
>> 20) & 0x3ff) * bs
;
3804 rgba
[i
][aComp
] = ((p
>> 30) ) * as
;
3808 const GLuint
*uisrc
= (const GLuint
*) src
;
3810 for (i
= 0; i
< n
; i
++) {
3811 GLuint p
= uisrc
[i
];
3812 rgba
[i
][rComp
] = ((p
) & 0x3ff) * rs
;
3813 rgba
[i
][gComp
] = ((p
>> 10) & 0x3ff) * gs
;
3814 rgba
[i
][bComp
] = ((p
>> 20) & 0x3ff) * bs
;
3815 rgba
[i
][aComp
] = ((p
>> 30) ) * as
;
3820 _mesa_problem(NULL
, "bad srcType in extract float data");
3827 * Unpack a row of color image data from a client buffer according to
3828 * the pixel unpacking parameters.
3829 * Return GLchan values in the specified dest image format.
3830 * This is used by glDrawPixels and glTexImage?D().
3831 * \param ctx - the context
3832 * n - number of pixels in the span
3833 * dstFormat - format of destination color array
3834 * dest - the destination color array
3835 * srcFormat - source image format
3836 * srcType - source image data type
3837 * source - source image pointer
3838 * srcPacking - pixel unpacking parameters
3839 * transferOps - bitmask of IMAGE_*_BIT values of operations to apply
3841 * XXX perhaps expand this to process whole images someday.
3844 _mesa_unpack_color_span_chan( GLcontext
*ctx
,
3845 GLuint n
, GLenum dstFormat
, GLchan dest
[],
3846 GLenum srcFormat
, GLenum srcType
,
3847 const GLvoid
*source
,
3848 const struct gl_pixelstore_attrib
*srcPacking
,
3849 GLbitfield transferOps
)
3851 ASSERT(dstFormat
== GL_ALPHA
||
3852 dstFormat
== GL_LUMINANCE
||
3853 dstFormat
== GL_LUMINANCE_ALPHA
||
3854 dstFormat
== GL_INTENSITY
||
3855 dstFormat
== GL_RGB
||
3856 dstFormat
== GL_RGBA
||
3857 dstFormat
== GL_COLOR_INDEX
);
3859 ASSERT(srcFormat
== GL_RED
||
3860 srcFormat
== GL_GREEN
||
3861 srcFormat
== GL_BLUE
||
3862 srcFormat
== GL_ALPHA
||
3863 srcFormat
== GL_LUMINANCE
||
3864 srcFormat
== GL_LUMINANCE_ALPHA
||
3865 srcFormat
== GL_INTENSITY
||
3866 srcFormat
== GL_RGB
||
3867 srcFormat
== GL_BGR
||
3868 srcFormat
== GL_RGBA
||
3869 srcFormat
== GL_BGRA
||
3870 srcFormat
== GL_ABGR_EXT
||
3871 srcFormat
== GL_COLOR_INDEX
);
3873 ASSERT(srcType
== GL_BITMAP
||
3874 srcType
== GL_UNSIGNED_BYTE
||
3875 srcType
== GL_BYTE
||
3876 srcType
== GL_UNSIGNED_SHORT
||
3877 srcType
== GL_SHORT
||
3878 srcType
== GL_UNSIGNED_INT
||
3879 srcType
== GL_INT
||
3880 srcType
== GL_HALF_FLOAT_ARB
||
3881 srcType
== GL_FLOAT
||
3882 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
3883 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
3884 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
3885 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
3886 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
3887 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
3888 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
3889 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
3890 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
3891 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
3892 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
3893 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
3895 /* Try simple cases first */
3896 if (transferOps
== 0) {
3897 if (srcType
== CHAN_TYPE
) {
3898 if (dstFormat
== GL_RGBA
) {
3899 if (srcFormat
== GL_RGBA
) {
3900 memcpy( dest
, source
, n
* 4 * sizeof(GLchan
) );
3903 else if (srcFormat
== GL_RGB
) {
3905 const GLchan
*src
= (const GLchan
*) source
;
3907 for (i
= 0; i
< n
; i
++) {
3918 else if (dstFormat
== GL_RGB
) {
3919 if (srcFormat
== GL_RGB
) {
3920 memcpy( dest
, source
, n
* 3 * sizeof(GLchan
) );
3923 else if (srcFormat
== GL_RGBA
) {
3925 const GLchan
*src
= (const GLchan
*) source
;
3927 for (i
= 0; i
< n
; i
++) {
3937 else if (dstFormat
== srcFormat
) {
3938 GLint comps
= _mesa_components_in_format(srcFormat
);
3940 memcpy( dest
, source
, n
* comps
* sizeof(GLchan
) );
3945 * Common situation, loading 8bit RGBA/RGB source images
3946 * into 16/32 bit destination. (OSMesa16/32)
3948 else if (srcType
== GL_UNSIGNED_BYTE
) {
3949 if (dstFormat
== GL_RGBA
) {
3950 if (srcFormat
== GL_RGB
) {
3952 const GLubyte
*src
= (const GLubyte
*) source
;
3954 for (i
= 0; i
< n
; i
++) {
3955 dst
[0] = UBYTE_TO_CHAN(src
[0]);
3956 dst
[1] = UBYTE_TO_CHAN(src
[1]);
3957 dst
[2] = UBYTE_TO_CHAN(src
[2]);
3964 else if (srcFormat
== GL_RGBA
) {
3966 const GLubyte
*src
= (const GLubyte
*) source
;
3968 for (i
= 0; i
< n
; i
++) {
3969 dst
[0] = UBYTE_TO_CHAN(src
[0]);
3970 dst
[1] = UBYTE_TO_CHAN(src
[1]);
3971 dst
[2] = UBYTE_TO_CHAN(src
[2]);
3972 dst
[3] = UBYTE_TO_CHAN(src
[3]);
3979 else if (dstFormat
== GL_RGB
) {
3980 if (srcFormat
== GL_RGB
) {
3982 const GLubyte
*src
= (const GLubyte
*) source
;
3984 for (i
= 0; i
< n
; i
++) {
3985 dst
[0] = UBYTE_TO_CHAN(src
[0]);
3986 dst
[1] = UBYTE_TO_CHAN(src
[1]);
3987 dst
[2] = UBYTE_TO_CHAN(src
[2]);
3993 else if (srcFormat
== GL_RGBA
) {
3995 const GLubyte
*src
= (const GLubyte
*) source
;
3997 for (i
= 0; i
< n
; i
++) {
3998 dst
[0] = UBYTE_TO_CHAN(src
[0]);
3999 dst
[1] = UBYTE_TO_CHAN(src
[1]);
4000 dst
[2] = UBYTE_TO_CHAN(src
[2]);
4011 /* general solution begins here */
4013 GLint dstComponents
;
4014 GLint dstRedIndex
, dstGreenIndex
, dstBlueIndex
, dstAlphaIndex
;
4015 GLint dstLuminanceIndex
, dstIntensityIndex
;
4016 GLfloat rgba
[MAX_WIDTH
][4];
4018 dstComponents
= _mesa_components_in_format( dstFormat
);
4019 /* source & dest image formats should have been error checked by now */
4020 assert(dstComponents
> 0);
4023 * Extract image data and convert to RGBA floats
4025 assert(n
<= MAX_WIDTH
);
4026 if (srcFormat
== GL_COLOR_INDEX
) {
4027 GLuint indexes
[MAX_WIDTH
];
4028 extract_uint_indexes(n
, indexes
, srcFormat
, srcType
, source
,
4031 if (dstFormat
== GL_COLOR_INDEX
) {
4033 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4034 /* convert to GLchan and return */
4035 for (i
= 0; i
< n
; i
++) {
4036 dest
[i
] = (GLchan
) (indexes
[i
] & 0xff);
4041 /* Convert indexes to RGBA */
4042 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
4043 shift_and_offset_ci(ctx
, n
, indexes
);
4045 _mesa_map_ci_to_rgba(ctx
, n
, indexes
, rgba
);
4048 /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
4049 * with color indexes.
4051 transferOps
&= ~(IMAGE_SCALE_BIAS_BIT
| IMAGE_MAP_COLOR_BIT
);
4054 /* non-color index data */
4055 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
4056 srcPacking
->SwapBytes
);
4059 /* Need to clamp if returning GLubytes or GLushorts */
4060 #if CHAN_TYPE != GL_FLOAT
4061 transferOps
|= IMAGE_CLAMP_BIT
;
4065 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, n
, rgba
);
4068 /* Now determine which color channels we need to produce.
4069 * And determine the dest index (offset) within each color tuple.
4071 switch (dstFormat
) {
4074 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
4075 dstLuminanceIndex
= dstIntensityIndex
= -1;
4078 dstLuminanceIndex
= 0;
4079 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
4080 dstIntensityIndex
= -1;
4082 case GL_LUMINANCE_ALPHA
:
4083 dstLuminanceIndex
= 0;
4085 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
4086 dstIntensityIndex
= -1;
4089 dstIntensityIndex
= 0;
4090 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
4091 dstLuminanceIndex
= -1;
4097 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
4104 dstLuminanceIndex
= dstIntensityIndex
= -1;
4107 _mesa_problem(ctx
, "bad dstFormat in _mesa_unpack_chan_span()");
4112 /* Now return the GLchan data in the requested dstFormat */
4114 if (dstRedIndex
>= 0) {
4117 for (i
= 0; i
< n
; i
++) {
4118 CLAMPED_FLOAT_TO_CHAN(dst
[dstRedIndex
], rgba
[i
][RCOMP
]);
4119 dst
+= dstComponents
;
4123 if (dstGreenIndex
>= 0) {
4126 for (i
= 0; i
< n
; i
++) {
4127 CLAMPED_FLOAT_TO_CHAN(dst
[dstGreenIndex
], rgba
[i
][GCOMP
]);
4128 dst
+= dstComponents
;
4132 if (dstBlueIndex
>= 0) {
4135 for (i
= 0; i
< n
; i
++) {
4136 CLAMPED_FLOAT_TO_CHAN(dst
[dstBlueIndex
], rgba
[i
][BCOMP
]);
4137 dst
+= dstComponents
;
4141 if (dstAlphaIndex
>= 0) {
4144 for (i
= 0; i
< n
; i
++) {
4145 CLAMPED_FLOAT_TO_CHAN(dst
[dstAlphaIndex
], rgba
[i
][ACOMP
]);
4146 dst
+= dstComponents
;
4150 if (dstIntensityIndex
>= 0) {
4153 assert(dstIntensityIndex
== 0);
4154 assert(dstComponents
== 1);
4155 for (i
= 0; i
< n
; i
++) {
4156 /* Intensity comes from red channel */
4157 CLAMPED_FLOAT_TO_CHAN(dst
[i
], rgba
[i
][RCOMP
]);
4161 if (dstLuminanceIndex
>= 0) {
4164 assert(dstLuminanceIndex
== 0);
4165 for (i
= 0; i
< n
; i
++) {
4166 /* Luminance comes from red channel */
4167 CLAMPED_FLOAT_TO_CHAN(dst
[0], rgba
[i
][RCOMP
]);
4168 dst
+= dstComponents
;
4176 * Same as _mesa_unpack_color_span_chan(), but return GLfloat data
4177 * instead of GLchan.
4180 _mesa_unpack_color_span_float( GLcontext
*ctx
,
4181 GLuint n
, GLenum dstFormat
, GLfloat dest
[],
4182 GLenum srcFormat
, GLenum srcType
,
4183 const GLvoid
*source
,
4184 const struct gl_pixelstore_attrib
*srcPacking
,
4185 GLbitfield transferOps
)
4187 ASSERT(dstFormat
== GL_ALPHA
||
4188 dstFormat
== GL_LUMINANCE
||
4189 dstFormat
== GL_LUMINANCE_ALPHA
||
4190 dstFormat
== GL_INTENSITY
||
4191 dstFormat
== GL_RGB
||
4192 dstFormat
== GL_RGBA
||
4193 dstFormat
== GL_COLOR_INDEX
);
4195 ASSERT(srcFormat
== GL_RED
||
4196 srcFormat
== GL_GREEN
||
4197 srcFormat
== GL_BLUE
||
4198 srcFormat
== GL_ALPHA
||
4199 srcFormat
== GL_LUMINANCE
||
4200 srcFormat
== GL_LUMINANCE_ALPHA
||
4201 srcFormat
== GL_INTENSITY
||
4202 srcFormat
== GL_RGB
||
4203 srcFormat
== GL_BGR
||
4204 srcFormat
== GL_RGBA
||
4205 srcFormat
== GL_BGRA
||
4206 srcFormat
== GL_ABGR_EXT
||
4207 srcFormat
== GL_RED_INTEGER_EXT
||
4208 srcFormat
== GL_GREEN_INTEGER_EXT
||
4209 srcFormat
== GL_BLUE_INTEGER_EXT
||
4210 srcFormat
== GL_ALPHA_INTEGER_EXT
||
4211 srcFormat
== GL_RGB_INTEGER_EXT
||
4212 srcFormat
== GL_RGBA_INTEGER_EXT
||
4213 srcFormat
== GL_BGR_INTEGER_EXT
||
4214 srcFormat
== GL_BGRA_INTEGER_EXT
||
4215 srcFormat
== GL_LUMINANCE_INTEGER_EXT
||
4216 srcFormat
== GL_LUMINANCE_ALPHA_INTEGER_EXT
||
4217 srcFormat
== GL_COLOR_INDEX
);
4219 ASSERT(srcType
== GL_BITMAP
||
4220 srcType
== GL_UNSIGNED_BYTE
||
4221 srcType
== GL_BYTE
||
4222 srcType
== GL_UNSIGNED_SHORT
||
4223 srcType
== GL_SHORT
||
4224 srcType
== GL_UNSIGNED_INT
||
4225 srcType
== GL_INT
||
4226 srcType
== GL_HALF_FLOAT_ARB
||
4227 srcType
== GL_FLOAT
||
4228 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
4229 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
4230 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
4231 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
4232 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
4233 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
4234 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
4235 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
4236 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
4237 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
4238 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
4239 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
4241 /* general solution, no special cases, yet */
4243 GLint dstComponents
;
4244 GLint dstRedIndex
, dstGreenIndex
, dstBlueIndex
, dstAlphaIndex
;
4245 GLint dstLuminanceIndex
, dstIntensityIndex
;
4246 GLfloat rgba
[MAX_WIDTH
][4];
4248 dstComponents
= _mesa_components_in_format( dstFormat
);
4249 /* source & dest image formats should have been error checked by now */
4250 assert(dstComponents
> 0);
4253 * Extract image data and convert to RGBA floats
4255 assert(n
<= MAX_WIDTH
);
4256 if (srcFormat
== GL_COLOR_INDEX
) {
4257 GLuint indexes
[MAX_WIDTH
];
4258 extract_uint_indexes(n
, indexes
, srcFormat
, srcType
, source
,
4261 if (dstFormat
== GL_COLOR_INDEX
) {
4263 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4264 /* convert to GLchan and return */
4265 for (i
= 0; i
< n
; i
++) {
4266 dest
[i
] = (GLchan
) (indexes
[i
] & 0xff);
4271 /* Convert indexes to RGBA */
4272 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
4273 shift_and_offset_ci(ctx
, n
, indexes
);
4275 _mesa_map_ci_to_rgba(ctx
, n
, indexes
, rgba
);
4278 /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
4279 * with color indexes.
4281 transferOps
&= ~(IMAGE_SCALE_BIAS_BIT
| IMAGE_MAP_COLOR_BIT
);
4284 /* non-color index data */
4285 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
4286 srcPacking
->SwapBytes
);
4290 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, n
, rgba
);
4293 /* Now determine which color channels we need to produce.
4294 * And determine the dest index (offset) within each color tuple.
4296 switch (dstFormat
) {
4299 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
4300 dstLuminanceIndex
= dstIntensityIndex
= -1;
4303 dstLuminanceIndex
= 0;
4304 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
4305 dstIntensityIndex
= -1;
4307 case GL_LUMINANCE_ALPHA
:
4308 dstLuminanceIndex
= 0;
4310 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
4311 dstIntensityIndex
= -1;
4314 dstIntensityIndex
= 0;
4315 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
4316 dstLuminanceIndex
= -1;
4322 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
4329 dstLuminanceIndex
= dstIntensityIndex
= -1;
4332 _mesa_problem(ctx
, "bad dstFormat in _mesa_unpack_color_span_float()");
4336 /* Now pack results in the requested dstFormat */
4337 if (dstRedIndex
>= 0) {
4338 GLfloat
*dst
= dest
;
4340 for (i
= 0; i
< n
; i
++) {
4341 dst
[dstRedIndex
] = rgba
[i
][RCOMP
];
4342 dst
+= dstComponents
;
4346 if (dstGreenIndex
>= 0) {
4347 GLfloat
*dst
= dest
;
4349 for (i
= 0; i
< n
; i
++) {
4350 dst
[dstGreenIndex
] = rgba
[i
][GCOMP
];
4351 dst
+= dstComponents
;
4355 if (dstBlueIndex
>= 0) {
4356 GLfloat
*dst
= dest
;
4358 for (i
= 0; i
< n
; i
++) {
4359 dst
[dstBlueIndex
] = rgba
[i
][BCOMP
];
4360 dst
+= dstComponents
;
4364 if (dstAlphaIndex
>= 0) {
4365 GLfloat
*dst
= dest
;
4367 for (i
= 0; i
< n
; i
++) {
4368 dst
[dstAlphaIndex
] = rgba
[i
][ACOMP
];
4369 dst
+= dstComponents
;
4373 if (dstIntensityIndex
>= 0) {
4374 GLfloat
*dst
= dest
;
4376 assert(dstIntensityIndex
== 0);
4377 assert(dstComponents
== 1);
4378 for (i
= 0; i
< n
; i
++) {
4379 /* Intensity comes from red channel */
4380 dst
[i
] = rgba
[i
][RCOMP
];
4384 if (dstLuminanceIndex
>= 0) {
4385 GLfloat
*dst
= dest
;
4387 assert(dstLuminanceIndex
== 0);
4388 for (i
= 0; i
< n
; i
++) {
4389 /* Luminance comes from red channel */
4390 dst
[0] = rgba
[i
][RCOMP
];
4391 dst
+= dstComponents
;
4398 * Similar to _mesa_unpack_color_span_float(), but for dudv data instead of rgba,
4399 * directly return GLbyte data, no transfer ops apply.
4402 _mesa_unpack_dudv_span_byte( GLcontext
*ctx
,
4403 GLuint n
, GLenum dstFormat
, GLbyte dest
[],
4404 GLenum srcFormat
, GLenum srcType
,
4405 const GLvoid
*source
,
4406 const struct gl_pixelstore_attrib
*srcPacking
,
4407 GLbitfield transferOps
)
4409 ASSERT(dstFormat
== GL_DUDV_ATI
);
4410 ASSERT(srcFormat
== GL_DUDV_ATI
);
4412 ASSERT(srcType
== GL_UNSIGNED_BYTE
||
4413 srcType
== GL_BYTE
||
4414 srcType
== GL_UNSIGNED_SHORT
||
4415 srcType
== GL_SHORT
||
4416 srcType
== GL_UNSIGNED_INT
||
4417 srcType
== GL_INT
||
4418 srcType
== GL_HALF_FLOAT_ARB
||
4419 srcType
== GL_FLOAT
);
4421 /* general solution */
4423 GLint dstComponents
;
4424 GLfloat rgba
[MAX_WIDTH
][4];
4428 dstComponents
= _mesa_components_in_format( dstFormat
);
4429 /* source & dest image formats should have been error checked by now */
4430 assert(dstComponents
> 0);
4433 * Extract image data and convert to RGBA floats
4435 assert(n
<= MAX_WIDTH
);
4436 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
4437 srcPacking
->SwapBytes
);
4440 /* Now determine which color channels we need to produce.
4441 * And determine the dest index (offset) within each color tuple.
4444 /* Now pack results in the requested dstFormat */
4445 for (i
= 0; i
< n
; i
++) {
4446 /* not sure - need clamp[-1,1] here? */
4447 dst
[0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
4448 dst
[1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
4449 dst
+= dstComponents
;
4455 * Unpack a row of color index data from a client buffer according to
4456 * the pixel unpacking parameters.
4457 * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
4459 * Args: ctx - the context
4460 * n - number of pixels
4461 * dstType - destination data type
4462 * dest - destination array
4463 * srcType - source pixel type
4464 * source - source data pointer
4465 * srcPacking - pixel unpacking parameters
4466 * transferOps - the pixel transfer operations to apply
4469 _mesa_unpack_index_span( const GLcontext
*ctx
, GLuint n
,
4470 GLenum dstType
, GLvoid
*dest
,
4471 GLenum srcType
, const GLvoid
*source
,
4472 const struct gl_pixelstore_attrib
*srcPacking
,
4473 GLbitfield transferOps
)
4475 ASSERT(srcType
== GL_BITMAP
||
4476 srcType
== GL_UNSIGNED_BYTE
||
4477 srcType
== GL_BYTE
||
4478 srcType
== GL_UNSIGNED_SHORT
||
4479 srcType
== GL_SHORT
||
4480 srcType
== GL_UNSIGNED_INT
||
4481 srcType
== GL_INT
||
4482 srcType
== GL_HALF_FLOAT_ARB
||
4483 srcType
== GL_FLOAT
);
4485 ASSERT(dstType
== GL_UNSIGNED_BYTE
||
4486 dstType
== GL_UNSIGNED_SHORT
||
4487 dstType
== GL_UNSIGNED_INT
);
4490 transferOps
&= (IMAGE_MAP_COLOR_BIT
| IMAGE_SHIFT_OFFSET_BIT
);
4493 * Try simple cases first
4495 if (transferOps
== 0 && srcType
== GL_UNSIGNED_BYTE
4496 && dstType
== GL_UNSIGNED_BYTE
) {
4497 memcpy(dest
, source
, n
* sizeof(GLubyte
));
4499 else if (transferOps
== 0 && srcType
== GL_UNSIGNED_INT
4500 && dstType
== GL_UNSIGNED_INT
&& !srcPacking
->SwapBytes
) {
4501 memcpy(dest
, source
, n
* sizeof(GLuint
));
4507 GLuint indexes
[MAX_WIDTH
];
4508 assert(n
<= MAX_WIDTH
);
4510 extract_uint_indexes(n
, indexes
, GL_COLOR_INDEX
, srcType
, source
,
4514 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4516 /* convert to dest type */
4518 case GL_UNSIGNED_BYTE
:
4520 GLubyte
*dst
= (GLubyte
*) dest
;
4522 for (i
= 0; i
< n
; i
++) {
4523 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
4527 case GL_UNSIGNED_SHORT
:
4529 GLuint
*dst
= (GLuint
*) dest
;
4531 for (i
= 0; i
< n
; i
++) {
4532 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
4536 case GL_UNSIGNED_INT
:
4537 memcpy(dest
, indexes
, n
* sizeof(GLuint
));
4540 _mesa_problem(ctx
, "bad dstType in _mesa_unpack_index_span");
4547 _mesa_pack_index_span( const GLcontext
*ctx
, GLuint n
,
4548 GLenum dstType
, GLvoid
*dest
, const GLuint
*source
,
4549 const struct gl_pixelstore_attrib
*dstPacking
,
4550 GLbitfield transferOps
)
4552 GLuint indexes
[MAX_WIDTH
];
4554 ASSERT(n
<= MAX_WIDTH
);
4556 transferOps
&= (IMAGE_MAP_COLOR_BIT
| IMAGE_SHIFT_OFFSET_BIT
);
4558 if (transferOps
& (IMAGE_MAP_COLOR_BIT
| IMAGE_SHIFT_OFFSET_BIT
)) {
4559 /* make a copy of input */
4560 memcpy(indexes
, source
, n
* sizeof(GLuint
));
4561 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4566 case GL_UNSIGNED_BYTE
:
4568 GLubyte
*dst
= (GLubyte
*) dest
;
4570 for (i
= 0; i
< n
; i
++) {
4571 *dst
++ = (GLubyte
) source
[i
];
4577 GLbyte
*dst
= (GLbyte
*) dest
;
4579 for (i
= 0; i
< n
; i
++) {
4580 dst
[i
] = (GLbyte
) source
[i
];
4584 case GL_UNSIGNED_SHORT
:
4586 GLushort
*dst
= (GLushort
*) dest
;
4588 for (i
= 0; i
< n
; i
++) {
4589 dst
[i
] = (GLushort
) source
[i
];
4591 if (dstPacking
->SwapBytes
) {
4592 _mesa_swap2( (GLushort
*) dst
, n
);
4598 GLshort
*dst
= (GLshort
*) dest
;
4600 for (i
= 0; i
< n
; i
++) {
4601 dst
[i
] = (GLshort
) source
[i
];
4603 if (dstPacking
->SwapBytes
) {
4604 _mesa_swap2( (GLushort
*) dst
, n
);
4608 case GL_UNSIGNED_INT
:
4610 GLuint
*dst
= (GLuint
*) dest
;
4612 for (i
= 0; i
< n
; i
++) {
4613 dst
[i
] = (GLuint
) source
[i
];
4615 if (dstPacking
->SwapBytes
) {
4616 _mesa_swap4( (GLuint
*) dst
, n
);
4622 GLint
*dst
= (GLint
*) dest
;
4624 for (i
= 0; i
< n
; i
++) {
4625 dst
[i
] = (GLint
) source
[i
];
4627 if (dstPacking
->SwapBytes
) {
4628 _mesa_swap4( (GLuint
*) dst
, n
);
4634 GLfloat
*dst
= (GLfloat
*) dest
;
4636 for (i
= 0; i
< n
; i
++) {
4637 dst
[i
] = (GLfloat
) source
[i
];
4639 if (dstPacking
->SwapBytes
) {
4640 _mesa_swap4( (GLuint
*) dst
, n
);
4644 case GL_HALF_FLOAT_ARB
:
4646 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
4648 for (i
= 0; i
< n
; i
++) {
4649 dst
[i
] = _mesa_float_to_half((GLfloat
) source
[i
]);
4651 if (dstPacking
->SwapBytes
) {
4652 _mesa_swap2( (GLushort
*) dst
, n
);
4657 _mesa_problem(ctx
, "bad type in _mesa_pack_index_span");
4663 * Unpack a row of stencil data from a client buffer according to
4664 * the pixel unpacking parameters.
4665 * This is (or will be) used by glDrawPixels
4667 * Args: ctx - the context
4668 * n - number of pixels
4669 * dstType - destination data type
4670 * dest - destination array
4671 * srcType - source pixel type
4672 * source - source data pointer
4673 * srcPacking - pixel unpacking parameters
4674 * transferOps - apply offset/bias/lookup ops?
4677 _mesa_unpack_stencil_span( const GLcontext
*ctx
, GLuint n
,
4678 GLenum dstType
, GLvoid
*dest
,
4679 GLenum srcType
, const GLvoid
*source
,
4680 const struct gl_pixelstore_attrib
*srcPacking
,
4681 GLbitfield transferOps
)
4683 ASSERT(srcType
== GL_BITMAP
||
4684 srcType
== GL_UNSIGNED_BYTE
||
4685 srcType
== GL_BYTE
||
4686 srcType
== GL_UNSIGNED_SHORT
||
4687 srcType
== GL_SHORT
||
4688 srcType
== GL_UNSIGNED_INT
||
4689 srcType
== GL_INT
||
4690 srcType
== GL_UNSIGNED_INT_24_8_EXT
||
4691 srcType
== GL_HALF_FLOAT_ARB
||
4692 srcType
== GL_FLOAT
);
4694 ASSERT(dstType
== GL_UNSIGNED_BYTE
||
4695 dstType
== GL_UNSIGNED_SHORT
||
4696 dstType
== GL_UNSIGNED_INT
);
4698 /* only shift and offset apply to stencil */
4699 transferOps
&= IMAGE_SHIFT_OFFSET_BIT
;
4702 * Try simple cases first
4704 if (transferOps
== 0 &&
4705 !ctx
->Pixel
.MapStencilFlag
&&
4706 srcType
== GL_UNSIGNED_BYTE
&&
4707 dstType
== GL_UNSIGNED_BYTE
) {
4708 memcpy(dest
, source
, n
* sizeof(GLubyte
));
4710 else if (transferOps
== 0 &&
4711 !ctx
->Pixel
.MapStencilFlag
&&
4712 srcType
== GL_UNSIGNED_INT
&&
4713 dstType
== GL_UNSIGNED_INT
&&
4714 !srcPacking
->SwapBytes
) {
4715 memcpy(dest
, source
, n
* sizeof(GLuint
));
4721 GLuint indexes
[MAX_WIDTH
];
4722 assert(n
<= MAX_WIDTH
);
4724 extract_uint_indexes(n
, indexes
, GL_STENCIL_INDEX
, srcType
, source
,
4727 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
4728 /* shift and offset indexes */
4729 shift_and_offset_ci(ctx
, n
, indexes
);
4732 if (ctx
->Pixel
.MapStencilFlag
) {
4733 /* Apply stencil lookup table */
4734 const GLuint mask
= ctx
->PixelMaps
.StoS
.Size
- 1;
4736 for (i
= 0; i
< n
; i
++) {
4737 indexes
[i
] = (GLuint
)ctx
->PixelMaps
.StoS
.Map
[ indexes
[i
] & mask
];
4741 /* convert to dest type */
4743 case GL_UNSIGNED_BYTE
:
4745 GLubyte
*dst
= (GLubyte
*) dest
;
4747 for (i
= 0; i
< n
; i
++) {
4748 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
4752 case GL_UNSIGNED_SHORT
:
4754 GLuint
*dst
= (GLuint
*) dest
;
4756 for (i
= 0; i
< n
; i
++) {
4757 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
4761 case GL_UNSIGNED_INT
:
4762 memcpy(dest
, indexes
, n
* sizeof(GLuint
));
4765 _mesa_problem(ctx
, "bad dstType in _mesa_unpack_stencil_span");
4772 _mesa_pack_stencil_span( const GLcontext
*ctx
, GLuint n
,
4773 GLenum dstType
, GLvoid
*dest
, const GLstencil
*source
,
4774 const struct gl_pixelstore_attrib
*dstPacking
)
4776 GLstencil stencil
[MAX_WIDTH
];
4778 ASSERT(n
<= MAX_WIDTH
);
4780 if (ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
||
4781 ctx
->Pixel
.MapStencilFlag
) {
4782 /* make a copy of input */
4783 memcpy(stencil
, source
, n
* sizeof(GLstencil
));
4784 _mesa_apply_stencil_transfer_ops(ctx
, n
, stencil
);
4789 case GL_UNSIGNED_BYTE
:
4790 if (sizeof(GLstencil
) == 1) {
4791 memcpy( dest
, source
, n
);
4794 GLubyte
*dst
= (GLubyte
*) dest
;
4797 dst
[i
] = (GLubyte
) source
[i
];
4803 GLbyte
*dst
= (GLbyte
*) dest
;
4806 dst
[i
] = (GLbyte
) (source
[i
] & 0x7f);
4810 case GL_UNSIGNED_SHORT
:
4812 GLushort
*dst
= (GLushort
*) dest
;
4815 dst
[i
] = (GLushort
) source
[i
];
4817 if (dstPacking
->SwapBytes
) {
4818 _mesa_swap2( (GLushort
*) dst
, n
);
4824 GLshort
*dst
= (GLshort
*) dest
;
4827 dst
[i
] = (GLshort
) source
[i
];
4829 if (dstPacking
->SwapBytes
) {
4830 _mesa_swap2( (GLushort
*) dst
, n
);
4834 case GL_UNSIGNED_INT
:
4836 GLuint
*dst
= (GLuint
*) dest
;
4839 dst
[i
] = (GLuint
) source
[i
];
4841 if (dstPacking
->SwapBytes
) {
4842 _mesa_swap4( (GLuint
*) dst
, n
);
4848 GLint
*dst
= (GLint
*) dest
;
4851 dst
[i
] = (GLint
) source
[i
];
4853 if (dstPacking
->SwapBytes
) {
4854 _mesa_swap4( (GLuint
*) dst
, n
);
4860 GLfloat
*dst
= (GLfloat
*) dest
;
4863 dst
[i
] = (GLfloat
) source
[i
];
4865 if (dstPacking
->SwapBytes
) {
4866 _mesa_swap4( (GLuint
*) dst
, n
);
4870 case GL_HALF_FLOAT_ARB
:
4872 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
4875 dst
[i
] = _mesa_float_to_half( (float) source
[i
] );
4877 if (dstPacking
->SwapBytes
) {
4878 _mesa_swap2( (GLushort
*) dst
, n
);
4883 if (dstPacking
->LsbFirst
) {
4884 GLubyte
*dst
= (GLubyte
*) dest
;
4887 for (i
= 0; i
< n
; i
++) {
4890 *dst
|= ((source
[i
] != 0) << shift
);
4899 GLubyte
*dst
= (GLubyte
*) dest
;
4902 for (i
= 0; i
< n
; i
++) {
4905 *dst
|= ((source
[i
] != 0) << shift
);
4915 _mesa_problem(ctx
, "bad type in _mesa_pack_index_span");
4919 #define DEPTH_VALUES(GLTYPE, GLTYPE2FLOAT) \
4922 const GLTYPE *src = (const GLTYPE *)source; \
4923 for (i = 0; i < n; i++) { \
4924 GLTYPE value = src[i]; \
4925 if (srcPacking->SwapBytes) { \
4926 if (sizeof(GLTYPE) == 2) { \
4928 } else if (sizeof(GLTYPE) == 4) { \
4932 depthValues[i] = GLTYPE2FLOAT(value); \
4938 * Unpack a row of depth/z values from memory, returning GLushort, GLuint
4939 * or GLfloat values.
4940 * The glPixelTransfer (scale/bias) params will be applied.
4942 * \param dstType one of GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, GL_FLOAT
4943 * \param depthMax max value for returned GLushort or GLuint values
4944 * (ignored for GLfloat).
4947 _mesa_unpack_depth_span( const GLcontext
*ctx
, GLuint n
,
4948 GLenum dstType
, GLvoid
*dest
, GLuint depthMax
,
4949 GLenum srcType
, const GLvoid
*source
,
4950 const struct gl_pixelstore_attrib
*srcPacking
)
4952 GLfloat depthTemp
[MAX_WIDTH
], *depthValues
;
4953 GLboolean needClamp
= GL_FALSE
;
4955 /* Look for special cases first.
4956 * Not only are these faster, they're less prone to numeric conversion
4957 * problems. Otherwise, converting from an int type to a float then
4958 * back to an int type can introduce errors that will show up as
4959 * artifacts in things like depth peeling which uses glCopyTexImage.
4961 if (ctx
->Pixel
.DepthScale
== 1.0 && ctx
->Pixel
.DepthBias
== 0.0) {
4962 if (srcType
== GL_UNSIGNED_INT
&& dstType
== GL_UNSIGNED_SHORT
) {
4963 const GLuint
*src
= (const GLuint
*) source
;
4964 GLushort
*dst
= (GLushort
*) dest
;
4966 for (i
= 0; i
< n
; i
++) {
4967 dst
[i
] = src
[i
] >> 16;
4971 if (srcType
== GL_UNSIGNED_SHORT
4972 && dstType
== GL_UNSIGNED_INT
4973 && depthMax
== 0xffffffff) {
4974 const GLushort
*src
= (const GLushort
*) source
;
4975 GLuint
*dst
= (GLuint
*) dest
;
4977 for (i
= 0; i
< n
; i
++) {
4978 dst
[i
] = src
[i
] | (src
[i
] << 16);
4982 if (srcType
== GL_UNSIGNED_INT_24_8
4983 && dstType
== GL_UNSIGNED_INT
4984 && depthMax
== 0xffffff) {
4985 const GLuint
*src
= (const GLuint
*) source
;
4986 GLuint
*dst
= (GLuint
*) dest
;
4988 for (i
= 0; i
< n
; i
++) {
4989 dst
[i
] = src
[i
] >> 8;
4993 /* XXX may want to add additional cases here someday */
4996 /* general case path follows */
4998 if (dstType
== GL_FLOAT
) {
4999 depthValues
= (GLfloat
*) dest
;
5002 depthValues
= depthTemp
;
5005 /* Convert incoming values to GLfloat. Some conversions will require
5010 DEPTH_VALUES(GLbyte
, BYTE_TO_FLOAT
);
5011 needClamp
= GL_TRUE
;
5013 case GL_UNSIGNED_BYTE
:
5014 DEPTH_VALUES(GLubyte
, UBYTE_TO_FLOAT
);
5017 DEPTH_VALUES(GLshort
, SHORT_TO_FLOAT
);
5018 needClamp
= GL_TRUE
;
5020 case GL_UNSIGNED_SHORT
:
5021 DEPTH_VALUES(GLushort
, USHORT_TO_FLOAT
);
5024 DEPTH_VALUES(GLint
, INT_TO_FLOAT
);
5025 needClamp
= GL_TRUE
;
5027 case GL_UNSIGNED_INT
:
5028 DEPTH_VALUES(GLuint
, UINT_TO_FLOAT
);
5030 case GL_UNSIGNED_INT_24_8_EXT
: /* GL_EXT_packed_depth_stencil */
5031 if (dstType
== GL_UNSIGNED_INT_24_8_EXT
&&
5032 depthMax
== 0xffffff &&
5033 ctx
->Pixel
.DepthScale
== 1.0 &&
5034 ctx
->Pixel
.DepthBias
== 0.0) {
5035 const GLuint
*src
= (const GLuint
*) source
;
5036 GLuint
*zValues
= (GLuint
*) dest
;
5038 for (i
= 0; i
< n
; i
++) {
5039 GLuint value
= src
[i
];
5040 if (srcPacking
->SwapBytes
) {
5043 zValues
[i
] = value
& 0xffffff00;
5048 const GLuint
*src
= (const GLuint
*) source
;
5049 const GLfloat scale
= 1.0f
/ 0xffffff;
5051 for (i
= 0; i
< n
; i
++) {
5052 GLuint value
= src
[i
];
5053 if (srcPacking
->SwapBytes
) {
5056 depthValues
[i
] = (value
>> 8) * scale
;
5061 DEPTH_VALUES(GLfloat
, 1*);
5062 needClamp
= GL_TRUE
;
5064 case GL_HALF_FLOAT_ARB
:
5067 const GLhalfARB
*src
= (const GLhalfARB
*) source
;
5068 for (i
= 0; i
< n
; i
++) {
5069 GLhalfARB value
= src
[i
];
5070 if (srcPacking
->SwapBytes
) {
5073 depthValues
[i
] = _mesa_half_to_float(value
);
5075 needClamp
= GL_TRUE
;
5079 _mesa_problem(NULL
, "bad type in _mesa_unpack_depth_span()");
5083 /* apply depth scale and bias */
5085 const GLfloat scale
= ctx
->Pixel
.DepthScale
;
5086 const GLfloat bias
= ctx
->Pixel
.DepthBias
;
5087 if (scale
!= 1.0 || bias
!= 0.0) {
5089 for (i
= 0; i
< n
; i
++) {
5090 depthValues
[i
] = depthValues
[i
] * scale
+ bias
;
5092 needClamp
= GL_TRUE
;
5096 /* clamp to [0, 1] */
5099 for (i
= 0; i
< n
; i
++) {
5100 depthValues
[i
] = (GLfloat
)CLAMP(depthValues
[i
], 0.0, 1.0);
5105 * Convert values to dstType
5107 if (dstType
== GL_UNSIGNED_INT
) {
5108 GLuint
*zValues
= (GLuint
*) dest
;
5110 if (depthMax
<= 0xffffff) {
5111 /* no overflow worries */
5112 for (i
= 0; i
< n
; i
++) {
5113 zValues
[i
] = (GLuint
) (depthValues
[i
] * (GLfloat
) depthMax
);
5117 /* need to use double precision to prevent overflow problems */
5118 for (i
= 0; i
< n
; i
++) {
5119 GLdouble z
= depthValues
[i
] * (GLfloat
) depthMax
;
5120 if (z
>= (GLdouble
) 0xffffffff)
5121 zValues
[i
] = 0xffffffff;
5123 zValues
[i
] = (GLuint
) z
;
5127 else if (dstType
== GL_UNSIGNED_SHORT
) {
5128 GLushort
*zValues
= (GLushort
*) dest
;
5130 ASSERT(depthMax
<= 0xffff);
5131 for (i
= 0; i
< n
; i
++) {
5132 zValues
[i
] = (GLushort
) (depthValues
[i
] * (GLfloat
) depthMax
);
5136 ASSERT(dstType
== GL_FLOAT
);
5137 /*ASSERT(depthMax == 1.0F);*/
5143 * Pack an array of depth values. The values are floats in [0,1].
5146 _mesa_pack_depth_span( const GLcontext
*ctx
, GLuint n
, GLvoid
*dest
,
5147 GLenum dstType
, const GLfloat
*depthSpan
,
5148 const struct gl_pixelstore_attrib
*dstPacking
)
5150 GLfloat depthCopy
[MAX_WIDTH
];
5152 ASSERT(n
<= MAX_WIDTH
);
5154 if (ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0) {
5155 memcpy(depthCopy
, depthSpan
, n
* sizeof(GLfloat
));
5156 _mesa_scale_and_bias_depth(ctx
, n
, depthCopy
);
5157 depthSpan
= depthCopy
;
5161 case GL_UNSIGNED_BYTE
:
5163 GLubyte
*dst
= (GLubyte
*) dest
;
5165 for (i
= 0; i
< n
; i
++) {
5166 dst
[i
] = FLOAT_TO_UBYTE( depthSpan
[i
] );
5172 GLbyte
*dst
= (GLbyte
*) dest
;
5174 for (i
= 0; i
< n
; i
++) {
5175 dst
[i
] = FLOAT_TO_BYTE( depthSpan
[i
] );
5179 case GL_UNSIGNED_SHORT
:
5181 GLushort
*dst
= (GLushort
*) dest
;
5183 for (i
= 0; i
< n
; i
++) {
5184 CLAMPED_FLOAT_TO_USHORT(dst
[i
], depthSpan
[i
]);
5186 if (dstPacking
->SwapBytes
) {
5187 _mesa_swap2( (GLushort
*) dst
, n
);
5193 GLshort
*dst
= (GLshort
*) dest
;
5195 for (i
= 0; i
< n
; i
++) {
5196 dst
[i
] = FLOAT_TO_SHORT( depthSpan
[i
] );
5198 if (dstPacking
->SwapBytes
) {
5199 _mesa_swap2( (GLushort
*) dst
, n
);
5203 case GL_UNSIGNED_INT
:
5205 GLuint
*dst
= (GLuint
*) dest
;
5207 for (i
= 0; i
< n
; i
++) {
5208 dst
[i
] = FLOAT_TO_UINT( depthSpan
[i
] );
5210 if (dstPacking
->SwapBytes
) {
5211 _mesa_swap4( (GLuint
*) dst
, n
);
5217 GLint
*dst
= (GLint
*) dest
;
5219 for (i
= 0; i
< n
; i
++) {
5220 dst
[i
] = FLOAT_TO_INT( depthSpan
[i
] );
5222 if (dstPacking
->SwapBytes
) {
5223 _mesa_swap4( (GLuint
*) dst
, n
);
5229 GLfloat
*dst
= (GLfloat
*) dest
;
5231 for (i
= 0; i
< n
; i
++) {
5232 dst
[i
] = depthSpan
[i
];
5234 if (dstPacking
->SwapBytes
) {
5235 _mesa_swap4( (GLuint
*) dst
, n
);
5239 case GL_HALF_FLOAT_ARB
:
5241 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
5243 for (i
= 0; i
< n
; i
++) {
5244 dst
[i
] = _mesa_float_to_half(depthSpan
[i
]);
5246 if (dstPacking
->SwapBytes
) {
5247 _mesa_swap2( (GLushort
*) dst
, n
);
5252 _mesa_problem(ctx
, "bad type in _mesa_pack_depth_span");
5259 * Pack depth and stencil values as GL_DEPTH_STENCIL/GL_UNSIGNED_INT_24_8.
5262 _mesa_pack_depth_stencil_span(const GLcontext
*ctx
, GLuint n
, GLuint
*dest
,
5263 const GLfloat
*depthVals
,
5264 const GLstencil
*stencilVals
,
5265 const struct gl_pixelstore_attrib
*dstPacking
)
5267 GLfloat depthCopy
[MAX_WIDTH
];
5268 GLstencil stencilCopy
[MAX_WIDTH
];
5271 ASSERT(n
<= MAX_WIDTH
);
5273 if (ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0) {
5274 memcpy(depthCopy
, depthVals
, n
* sizeof(GLfloat
));
5275 _mesa_scale_and_bias_depth(ctx
, n
, depthCopy
);
5276 depthVals
= depthCopy
;
5279 if (ctx
->Pixel
.IndexShift
||
5280 ctx
->Pixel
.IndexOffset
||
5281 ctx
->Pixel
.MapStencilFlag
) {
5282 memcpy(stencilCopy
, stencilVals
, n
* sizeof(GLstencil
));
5283 _mesa_apply_stencil_transfer_ops(ctx
, n
, stencilCopy
);
5284 stencilVals
= stencilCopy
;
5287 for (i
= 0; i
< n
; i
++) {
5288 GLuint z
= (GLuint
) (depthVals
[i
] * 0xffffff);
5289 dest
[i
] = (z
<< 8) | (stencilVals
[i
] & 0xff);
5292 if (dstPacking
->SwapBytes
) {
5293 _mesa_swap4(dest
, n
);
5301 * Unpack image data. Apply byte swapping, byte flipping (bitmap).
5302 * Return all image data in a contiguous block. This is used when we
5303 * compile glDrawPixels, glTexImage, etc into a display list. We
5304 * need a copy of the data in a standard format.
5307 _mesa_unpack_image( GLuint dimensions
,
5308 GLsizei width
, GLsizei height
, GLsizei depth
,
5309 GLenum format
, GLenum type
, const GLvoid
*pixels
,
5310 const struct gl_pixelstore_attrib
*unpack
)
5312 GLint bytesPerRow
, compsPerRow
;
5313 GLboolean flipBytes
, swap2
, swap4
;
5316 return NULL
; /* not necessarily an error */
5318 if (width
<= 0 || height
<= 0 || depth
<= 0)
5319 return NULL
; /* generate error later */
5321 if (type
== GL_BITMAP
) {
5322 bytesPerRow
= (width
+ 7) >> 3;
5323 flipBytes
= unpack
->LsbFirst
;
5324 swap2
= swap4
= GL_FALSE
;
5328 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
5329 GLint components
= _mesa_components_in_format(format
);
5332 if (_mesa_type_is_packed(type
))
5335 if (bytesPerPixel
<= 0 || components
<= 0)
5336 return NULL
; /* bad format or type. generate error later */
5337 bytesPerRow
= bytesPerPixel
* width
;
5338 bytesPerComp
= bytesPerPixel
/ components
;
5339 flipBytes
= GL_FALSE
;
5340 swap2
= (bytesPerComp
== 2) && unpack
->SwapBytes
;
5341 swap4
= (bytesPerComp
== 4) && unpack
->SwapBytes
;
5342 compsPerRow
= components
* width
;
5343 assert(compsPerRow
>= width
);
5348 = (GLubyte
*) malloc(bytesPerRow
* height
* depth
);
5352 return NULL
; /* generate GL_OUT_OF_MEMORY later */
5355 for (img
= 0; img
< depth
; img
++) {
5356 for (row
= 0; row
< height
; row
++) {
5357 const GLvoid
*src
= _mesa_image_address(dimensions
, unpack
, pixels
,
5358 width
, height
, format
, type
, img
, row
, 0);
5360 if ((type
== GL_BITMAP
) && (unpack
->SkipPixels
& 0x7)) {
5362 flipBytes
= GL_FALSE
;
5363 if (unpack
->LsbFirst
) {
5364 GLubyte srcMask
= 1 << (unpack
->SkipPixels
& 0x7);
5365 GLubyte dstMask
= 128;
5366 const GLubyte
*s
= src
;
5369 for (i
= 0; i
< width
; i
++) {
5373 if (srcMask
== 128) {
5378 srcMask
= srcMask
<< 1;
5386 dstMask
= dstMask
>> 1;
5391 GLubyte srcMask
= 128 >> (unpack
->SkipPixels
& 0x7);
5392 GLubyte dstMask
= 128;
5393 const GLubyte
*s
= src
;
5396 for (i
= 0; i
< width
; i
++) {
5405 srcMask
= srcMask
>> 1;
5413 dstMask
= dstMask
>> 1;
5419 memcpy(dst
, src
, bytesPerRow
);
5422 /* byte flipping/swapping */
5424 flip_bytes((GLubyte
*) dst
, bytesPerRow
);
5427 _mesa_swap2((GLushort
*) dst
, compsPerRow
);
5430 _mesa_swap4((GLuint
*) dst
, compsPerRow
);
5439 #endif /* _HAVE_FULL_GL */
5444 * Convert an array of RGBA colors from one datatype to another.
5445 * NOTE: src may equal dst. In that case, we use a temporary buffer.
5448 _mesa_convert_colors(GLenum srcType
, const GLvoid
*src
,
5449 GLenum dstType
, GLvoid
*dst
,
5450 GLuint count
, const GLubyte mask
[])
5452 GLuint tempBuffer
[MAX_WIDTH
][4];
5453 const GLboolean useTemp
= (src
== dst
);
5455 ASSERT(srcType
!= dstType
);
5458 case GL_UNSIGNED_BYTE
:
5459 if (dstType
== GL_UNSIGNED_SHORT
) {
5460 const GLubyte (*src1
)[4] = (const GLubyte (*)[4]) src
;
5461 GLushort (*dst2
)[4] = (GLushort (*)[4]) (useTemp
? tempBuffer
: dst
);
5463 for (i
= 0; i
< count
; i
++) {
5464 if (!mask
|| mask
[i
]) {
5465 dst2
[i
][RCOMP
] = UBYTE_TO_USHORT(src1
[i
][RCOMP
]);
5466 dst2
[i
][GCOMP
] = UBYTE_TO_USHORT(src1
[i
][GCOMP
]);
5467 dst2
[i
][BCOMP
] = UBYTE_TO_USHORT(src1
[i
][BCOMP
]);
5468 dst2
[i
][ACOMP
] = UBYTE_TO_USHORT(src1
[i
][ACOMP
]);
5472 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLushort
));
5475 const GLubyte (*src1
)[4] = (const GLubyte (*)[4]) src
;
5476 GLfloat (*dst4
)[4] = (GLfloat (*)[4]) (useTemp
? tempBuffer
: dst
);
5478 ASSERT(dstType
== GL_FLOAT
);
5479 for (i
= 0; i
< count
; i
++) {
5480 if (!mask
|| mask
[i
]) {
5481 dst4
[i
][RCOMP
] = UBYTE_TO_FLOAT(src1
[i
][RCOMP
]);
5482 dst4
[i
][GCOMP
] = UBYTE_TO_FLOAT(src1
[i
][GCOMP
]);
5483 dst4
[i
][BCOMP
] = UBYTE_TO_FLOAT(src1
[i
][BCOMP
]);
5484 dst4
[i
][ACOMP
] = UBYTE_TO_FLOAT(src1
[i
][ACOMP
]);
5488 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLfloat
));
5491 case GL_UNSIGNED_SHORT
:
5492 if (dstType
== GL_UNSIGNED_BYTE
) {
5493 const GLushort (*src2
)[4] = (const GLushort (*)[4]) src
;
5494 GLubyte (*dst1
)[4] = (GLubyte (*)[4]) (useTemp
? tempBuffer
: dst
);
5496 for (i
= 0; i
< count
; i
++) {
5497 if (!mask
|| mask
[i
]) {
5498 dst1
[i
][RCOMP
] = USHORT_TO_UBYTE(src2
[i
][RCOMP
]);
5499 dst1
[i
][GCOMP
] = USHORT_TO_UBYTE(src2
[i
][GCOMP
]);
5500 dst1
[i
][BCOMP
] = USHORT_TO_UBYTE(src2
[i
][BCOMP
]);
5501 dst1
[i
][ACOMP
] = USHORT_TO_UBYTE(src2
[i
][ACOMP
]);
5505 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLubyte
));
5508 const GLushort (*src2
)[4] = (const GLushort (*)[4]) src
;
5509 GLfloat (*dst4
)[4] = (GLfloat (*)[4]) (useTemp
? tempBuffer
: dst
);
5511 ASSERT(dstType
== GL_FLOAT
);
5512 for (i
= 0; i
< count
; i
++) {
5513 if (!mask
|| mask
[i
]) {
5514 dst4
[i
][RCOMP
] = USHORT_TO_FLOAT(src2
[i
][RCOMP
]);
5515 dst4
[i
][GCOMP
] = USHORT_TO_FLOAT(src2
[i
][GCOMP
]);
5516 dst4
[i
][BCOMP
] = USHORT_TO_FLOAT(src2
[i
][BCOMP
]);
5517 dst4
[i
][ACOMP
] = USHORT_TO_FLOAT(src2
[i
][ACOMP
]);
5521 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLfloat
));
5525 if (dstType
== GL_UNSIGNED_BYTE
) {
5526 const GLfloat (*src4
)[4] = (const GLfloat (*)[4]) src
;
5527 GLubyte (*dst1
)[4] = (GLubyte (*)[4]) (useTemp
? tempBuffer
: dst
);
5529 for (i
= 0; i
< count
; i
++) {
5530 if (!mask
|| mask
[i
]) {
5531 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][RCOMP
], src4
[i
][RCOMP
]);
5532 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][GCOMP
], src4
[i
][GCOMP
]);
5533 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][BCOMP
], src4
[i
][BCOMP
]);
5534 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][ACOMP
], src4
[i
][ACOMP
]);
5538 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLubyte
));
5541 const GLfloat (*src4
)[4] = (const GLfloat (*)[4]) src
;
5542 GLushort (*dst2
)[4] = (GLushort (*)[4]) (useTemp
? tempBuffer
: dst
);
5544 ASSERT(dstType
== GL_UNSIGNED_SHORT
);
5545 for (i
= 0; i
< count
; i
++) {
5546 if (!mask
|| mask
[i
]) {
5547 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][RCOMP
], src4
[i
][RCOMP
]);
5548 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][GCOMP
], src4
[i
][GCOMP
]);
5549 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][BCOMP
], src4
[i
][BCOMP
]);
5550 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][ACOMP
], src4
[i
][ACOMP
]);
5554 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLushort
));
5558 _mesa_problem(NULL
, "Invalid datatype in _mesa_convert_colors");
5566 * Perform basic clipping for glDrawPixels. The image's position and size
5567 * and the unpack SkipPixels and SkipRows are adjusted so that the image
5568 * region is entirely within the window and scissor bounds.
5569 * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).
5570 * If Pixel.ZoomY is -1, *destY will be changed to be the first row which
5571 * we'll actually write. Beforehand, *destY-1 is the first drawing row.
5573 * \return GL_TRUE if image is ready for drawing or
5574 * GL_FALSE if image was completely clipped away (draw nothing)
5577 _mesa_clip_drawpixels(const GLcontext
*ctx
,
5578 GLint
*destX
, GLint
*destY
,
5579 GLsizei
*width
, GLsizei
*height
,
5580 struct gl_pixelstore_attrib
*unpack
)
5582 const GLframebuffer
*buffer
= ctx
->DrawBuffer
;
5584 if (unpack
->RowLength
== 0) {
5585 unpack
->RowLength
= *width
;
5588 ASSERT(ctx
->Pixel
.ZoomX
== 1.0F
);
5589 ASSERT(ctx
->Pixel
.ZoomY
== 1.0F
|| ctx
->Pixel
.ZoomY
== -1.0F
);
5592 if (*destX
< buffer
->_Xmin
) {
5593 unpack
->SkipPixels
+= (buffer
->_Xmin
- *destX
);
5594 *width
-= (buffer
->_Xmin
- *destX
);
5595 *destX
= buffer
->_Xmin
;
5597 /* right clipping */
5598 if (*destX
+ *width
> buffer
->_Xmax
)
5599 *width
-= (*destX
+ *width
- buffer
->_Xmax
);
5604 if (ctx
->Pixel
.ZoomY
== 1.0F
) {
5605 /* bottom clipping */
5606 if (*destY
< buffer
->_Ymin
) {
5607 unpack
->SkipRows
+= (buffer
->_Ymin
- *destY
);
5608 *height
-= (buffer
->_Ymin
- *destY
);
5609 *destY
= buffer
->_Ymin
;
5612 if (*destY
+ *height
> buffer
->_Ymax
)
5613 *height
-= (*destY
+ *height
- buffer
->_Ymax
);
5615 else { /* upside down */
5617 if (*destY
> buffer
->_Ymax
) {
5618 unpack
->SkipRows
+= (*destY
- buffer
->_Ymax
);
5619 *height
-= (*destY
- buffer
->_Ymax
);
5620 *destY
= buffer
->_Ymax
;
5622 /* bottom clipping */
5623 if (*destY
- *height
< buffer
->_Ymin
)
5624 *height
-= (buffer
->_Ymin
- (*destY
- *height
));
5625 /* adjust destY so it's the first row to write to */
5637 * Perform clipping for glReadPixels. The image's window position
5638 * and size, and the pack skipPixels, skipRows and rowLength are adjusted
5639 * so that the image region is entirely within the window bounds.
5640 * Note: this is different from _mesa_clip_drawpixels() in that the
5641 * scissor box is ignored, and we use the bounds of the current readbuffer
5644 * \return GL_TRUE if image is ready for drawing or
5645 * GL_FALSE if image was completely clipped away (draw nothing)
5648 _mesa_clip_readpixels(const GLcontext
*ctx
,
5649 GLint
*srcX
, GLint
*srcY
,
5650 GLsizei
*width
, GLsizei
*height
,
5651 struct gl_pixelstore_attrib
*pack
)
5653 const GLframebuffer
*buffer
= ctx
->ReadBuffer
;
5655 if (pack
->RowLength
== 0) {
5656 pack
->RowLength
= *width
;
5661 pack
->SkipPixels
+= (0 - *srcX
);
5662 *width
-= (0 - *srcX
);
5665 /* right clipping */
5666 if (*srcX
+ *width
> (GLsizei
) buffer
->Width
)
5667 *width
-= (*srcX
+ *width
- buffer
->Width
);
5672 /* bottom clipping */
5674 pack
->SkipRows
+= (0 - *srcY
);
5675 *height
-= (0 - *srcY
);
5679 if (*srcY
+ *height
> (GLsizei
) buffer
->Height
)
5680 *height
-= (*srcY
+ *height
- buffer
->Height
);
5690 * Do clipping for a glCopyTexSubImage call.
5691 * The framebuffer source region might extend outside the framebuffer
5692 * bounds. Clip the source region against the framebuffer bounds and
5693 * adjust the texture/dest position and size accordingly.
5695 * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise.
5698 _mesa_clip_copytexsubimage(const GLcontext
*ctx
,
5699 GLint
*destX
, GLint
*destY
,
5700 GLint
*srcX
, GLint
*srcY
,
5701 GLsizei
*width
, GLsizei
*height
)
5703 const struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
5704 const GLint srcX0
= *srcX
, srcY0
= *srcY
;
5706 if (_mesa_clip_to_region(0, 0, fb
->Width
, fb
->Height
,
5707 srcX
, srcY
, width
, height
)) {
5708 *destX
= *destX
+ *srcX
- srcX0
;
5709 *destY
= *destY
+ *srcY
- srcY0
;
5721 * Clip the rectangle defined by (x, y, width, height) against the bounds
5722 * specified by [xmin, xmax) and [ymin, ymax).
5723 * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.
5726 _mesa_clip_to_region(GLint xmin
, GLint ymin
,
5727 GLint xmax
, GLint ymax
,
5729 GLsizei
*width
, GLsizei
*height
)
5733 *width
-= (xmin
- *x
);
5737 /* right clipping */
5738 if (*x
+ *width
> xmax
)
5739 *width
-= (*x
+ *width
- xmax
);
5744 /* bottom (or top) clipping */
5746 *height
-= (ymin
- *y
);
5750 /* top (or bottom) clipping */
5751 if (*y
+ *height
> ymax
)
5752 *height
-= (*y
+ *height
- ymax
);
5762 * Clip dst coords against Xmax (or Ymax).
5765 clip_right_or_top(GLint
*srcX0
, GLint
*srcX1
,
5766 GLint
*dstX0
, GLint
*dstX1
,
5771 if (*dstX1
> maxValue
) {
5772 /* X1 outside right edge */
5773 ASSERT(*dstX0
< maxValue
); /* X0 should be inside right edge */
5774 t
= (GLfloat
) (maxValue
- *dstX0
) / (GLfloat
) (*dstX1
- *dstX0
);
5775 /* chop off [t, 1] part */
5776 ASSERT(t
>= 0.0 && t
<= 1.0);
5778 bias
= (*srcX0
< *srcX1
) ? 0.5F
: -0.5F
;
5779 *srcX1
= *srcX0
+ (GLint
) (t
* (*srcX1
- *srcX0
) + bias
);
5781 else if (*dstX0
> maxValue
) {
5782 /* X0 outside right edge */
5783 ASSERT(*dstX1
< maxValue
); /* X1 should be inside right edge */
5784 t
= (GLfloat
) (maxValue
- *dstX1
) / (GLfloat
) (*dstX0
- *dstX1
);
5785 /* chop off [t, 1] part */
5786 ASSERT(t
>= 0.0 && t
<= 1.0);
5788 bias
= (*srcX0
< *srcX1
) ? -0.5F
: 0.5F
;
5789 *srcX0
= *srcX1
+ (GLint
) (t
* (*srcX0
- *srcX1
) + bias
);
5795 * Clip dst coords against Xmin (or Ymin).
5798 clip_left_or_bottom(GLint
*srcX0
, GLint
*srcX1
,
5799 GLint
*dstX0
, GLint
*dstX1
,
5804 if (*dstX0
< minValue
) {
5805 /* X0 outside left edge */
5806 ASSERT(*dstX1
> minValue
); /* X1 should be inside left edge */
5807 t
= (GLfloat
) (minValue
- *dstX0
) / (GLfloat
) (*dstX1
- *dstX0
);
5808 /* chop off [0, t] part */
5809 ASSERT(t
>= 0.0 && t
<= 1.0);
5811 bias
= (*srcX0
< *srcX1
) ? 0.5F
: -0.5F
; /* flipped??? */
5812 *srcX0
= *srcX0
+ (GLint
) (t
* (*srcX1
- *srcX0
) + bias
);
5814 else if (*dstX1
< minValue
) {
5815 /* X1 outside left edge */
5816 ASSERT(*dstX0
> minValue
); /* X0 should be inside left edge */
5817 t
= (GLfloat
) (minValue
- *dstX1
) / (GLfloat
) (*dstX0
- *dstX1
);
5818 /* chop off [0, t] part */
5819 ASSERT(t
>= 0.0 && t
<= 1.0);
5821 bias
= (*srcX0
< *srcX1
) ? 0.5F
: -0.5F
;
5822 *srcX1
= *srcX1
+ (GLint
) (t
* (*srcX0
- *srcX1
) + bias
);
5828 * Do clipping of blit src/dest rectangles.
5829 * The dest rect is clipped against both the buffer bounds and scissor bounds.
5830 * The src rect is just clipped against the buffer bounds.
5832 * When either the src or dest rect is clipped, the other is also clipped
5835 * Note that X0 need not be less than X1 (same for Y) for either the source
5836 * and dest rects. That makes the clipping a little trickier.
5838 * \return GL_TRUE if anything is left to draw, GL_FALSE if totally clipped
5841 _mesa_clip_blit(GLcontext
*ctx
,
5842 GLint
*srcX0
, GLint
*srcY0
, GLint
*srcX1
, GLint
*srcY1
,
5843 GLint
*dstX0
, GLint
*dstY0
, GLint
*dstX1
, GLint
*dstY1
)
5845 const GLint srcXmin
= 0;
5846 const GLint srcXmax
= ctx
->ReadBuffer
->Width
;
5847 const GLint srcYmin
= 0;
5848 const GLint srcYmax
= ctx
->ReadBuffer
->Height
;
5850 /* these include scissor bounds */
5851 const GLint dstXmin
= ctx
->DrawBuffer
->_Xmin
;
5852 const GLint dstXmax
= ctx
->DrawBuffer
->_Xmax
;
5853 const GLint dstYmin
= ctx
->DrawBuffer
->_Ymin
;
5854 const GLint dstYmax
= ctx
->DrawBuffer
->_Ymax
;
5857 printf("PreClipX: src: %d .. %d dst: %d .. %d\n",
5858 *srcX0, *srcX1, *dstX0, *dstX1);
5859 printf("PreClipY: src: %d .. %d dst: %d .. %d\n",
5860 *srcY0, *srcY1, *dstY0, *dstY1);
5863 /* trivial rejection tests */
5864 if (*dstX0
== *dstX1
)
5865 return GL_FALSE
; /* no width */
5866 if (*dstX0
<= dstXmin
&& *dstX1
<= dstXmin
)
5867 return GL_FALSE
; /* totally out (left) of bounds */
5868 if (*dstX0
>= dstXmax
&& *dstX1
>= dstXmax
)
5869 return GL_FALSE
; /* totally out (right) of bounds */
5871 if (*dstY0
== *dstY1
)
5873 if (*dstY0
<= dstYmin
&& *dstY1
<= dstYmin
)
5875 if (*dstY0
>= dstYmax
&& *dstY1
>= dstYmax
)
5878 if (*srcX0
== *srcX1
)
5880 if (*srcX0
<= srcXmin
&& *srcX1
<= srcXmin
)
5882 if (*srcX0
>= srcXmax
&& *srcX1
>= srcXmax
)
5885 if (*srcY0
== *srcY1
)
5887 if (*srcY0
<= srcYmin
&& *srcY1
<= srcYmin
)
5889 if (*srcY0
>= srcYmax
&& *srcY1
>= srcYmax
)
5895 clip_right_or_top(srcX0
, srcX1
, dstX0
, dstX1
, dstXmax
);
5896 clip_right_or_top(srcY0
, srcY1
, dstY0
, dstY1
, dstYmax
);
5897 clip_left_or_bottom(srcX0
, srcX1
, dstX0
, dstX1
, dstXmin
);
5898 clip_left_or_bottom(srcY0
, srcY1
, dstY0
, dstY1
, dstYmin
);
5901 * src clip (just swap src/dst values from above)
5903 clip_right_or_top(dstX0
, dstX1
, srcX0
, srcX1
, srcXmax
);
5904 clip_right_or_top(dstY0
, dstY1
, srcY0
, srcY1
, srcYmax
);
5905 clip_left_or_bottom(dstX0
, dstX1
, srcX0
, srcX1
, srcXmin
);
5906 clip_left_or_bottom(dstY0
, dstY1
, srcY0
, srcY1
, srcYmin
);
5909 printf("PostClipX: src: %d .. %d dst: %d .. %d\n",
5910 *srcX0, *srcX1, *dstX0, *dstX1);
5911 printf("PostClipY: src: %d .. %d dst: %d .. %d\n",
5912 *srcY0, *srcY1, *dstY0, *dstY1);
5915 ASSERT(*dstX0
>= dstXmin
);
5916 ASSERT(*dstX0
<= dstXmax
);
5917 ASSERT(*dstX1
>= dstXmin
);
5918 ASSERT(*dstX1
<= dstXmax
);
5920 ASSERT(*dstY0
>= dstYmin
);
5921 ASSERT(*dstY0
<= dstYmax
);
5922 ASSERT(*dstY1
>= dstYmin
);
5923 ASSERT(*dstY1
<= dstYmax
);
5925 ASSERT(*srcX0
>= srcXmin
);
5926 ASSERT(*srcX0
<= srcXmax
);
5927 ASSERT(*srcX1
>= srcXmin
);
5928 ASSERT(*srcX1
<= srcXmax
);
5930 ASSERT(*srcY0
>= srcYmin
);
5931 ASSERT(*srcY0
<= srcYmax
);
5932 ASSERT(*srcY1
>= srcYmin
);
5933 ASSERT(*srcY1
<= srcYmax
);