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.
44 * Normally, BYTE_TO_FLOAT(0) returns 0.00392 That causes problems when
45 * we later convert the float to a packed integer value (such as for
46 * GL_RGB5_A1) because we'll wind up with a non-zero value.
48 * We redefine the macros here so zero is handled correctly.
51 #define BYTE_TO_FLOAT(B) ((B) == 0 ? 0.0F : ((2.0F * (B) + 1.0F) * (1.0F/255.0F)))
54 #define SHORT_TO_FLOAT(S) ((S) == 0 ? 0.0F : ((2.0F * (S) + 1.0F) * (1.0F/65535.0F)))
58 /** Compute ceiling of integer quotient of A divided by B. */
59 #define CEILING( A, B ) ( (A) % (B) == 0 ? (A)/(B) : (A)/(B)+1 )
63 * \return GL_TRUE if type is packed pixel type, GL_FALSE otherwise.
66 _mesa_type_is_packed(GLenum type
)
69 case GL_UNSIGNED_BYTE_3_3_2
:
70 case GL_UNSIGNED_BYTE_2_3_3_REV
:
71 case GL_UNSIGNED_SHORT_5_6_5
:
72 case GL_UNSIGNED_SHORT_5_6_5_REV
:
73 case GL_UNSIGNED_SHORT_4_4_4_4
:
74 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
75 case GL_UNSIGNED_SHORT_5_5_5_1
:
76 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
77 case GL_UNSIGNED_INT_8_8_8_8
:
78 case GL_UNSIGNED_INT_8_8_8_8_REV
:
79 case GL_UNSIGNED_INT_10_10_10_2
:
80 case GL_UNSIGNED_INT_2_10_10_10_REV
:
81 case GL_UNSIGNED_SHORT_8_8_MESA
:
82 case GL_UNSIGNED_SHORT_8_8_REV_MESA
:
83 case GL_UNSIGNED_INT_24_8_EXT
:
91 * Flip the 8 bits in each byte of the given array.
94 * \param n number of bytes.
96 * \todo try this trick to flip bytes someday:
98 * v = ((v & 0x55555555) << 1) | ((v >> 1) & 0x55555555);
99 * v = ((v & 0x33333333) << 2) | ((v >> 2) & 0x33333333);
100 * v = ((v & 0x0f0f0f0f) << 4) | ((v >> 4) & 0x0f0f0f0f);
104 flip_bytes( GLubyte
*p
, GLuint n
)
107 for (i
= 0; i
< n
; i
++) {
108 b
= (GLuint
) p
[i
]; /* words are often faster than bytes */
109 a
= ((b
& 0x01) << 7) |
123 * Flip the order of the 2 bytes in each word in the given array.
126 * \param n number of words.
129 _mesa_swap2( GLushort
*p
, GLuint n
)
132 for (i
= 0; i
< n
; i
++) {
133 p
[i
] = (p
[i
] >> 8) | ((p
[i
] << 8) & 0xff00);
140 * Flip the order of the 4 bytes in each word in the given array.
143 _mesa_swap4( GLuint
*p
, GLuint n
)
146 for (i
= 0; i
< n
; i
++) {
149 | ((b
>> 8) & 0xff00)
150 | ((b
<< 8) & 0xff0000)
151 | ((b
<< 24) & 0xff000000);
158 * Get the size of a GL data type.
160 * \param type GL data type.
162 * \return the size, in bytes, of the given data type, 0 if a GL_BITMAP, or -1
163 * if an invalid type enum.
166 _mesa_sizeof_type( GLenum type
)
171 case GL_UNSIGNED_BYTE
:
172 return sizeof(GLubyte
);
174 return sizeof(GLbyte
);
175 case GL_UNSIGNED_SHORT
:
176 return sizeof(GLushort
);
178 return sizeof(GLshort
);
179 case GL_UNSIGNED_INT
:
180 return sizeof(GLuint
);
182 return sizeof(GLint
);
184 return sizeof(GLfloat
);
186 return sizeof(GLdouble
);
187 case GL_HALF_FLOAT_ARB
:
188 return sizeof(GLhalfARB
);
196 * Same as _mesa_sizeof_type() but also accepting the packed pixel
200 _mesa_sizeof_packed_type( GLenum type
)
205 case GL_UNSIGNED_BYTE
:
206 return sizeof(GLubyte
);
208 return sizeof(GLbyte
);
209 case GL_UNSIGNED_SHORT
:
210 return sizeof(GLushort
);
212 return sizeof(GLshort
);
213 case GL_UNSIGNED_INT
:
214 return sizeof(GLuint
);
216 return sizeof(GLint
);
217 case GL_HALF_FLOAT_ARB
:
218 return sizeof(GLhalfARB
);
220 return sizeof(GLfloat
);
221 case GL_UNSIGNED_BYTE_3_3_2
:
222 return sizeof(GLubyte
);
223 case GL_UNSIGNED_BYTE_2_3_3_REV
:
224 return sizeof(GLubyte
);
225 case GL_UNSIGNED_SHORT_5_6_5
:
226 return sizeof(GLushort
);
227 case GL_UNSIGNED_SHORT_5_6_5_REV
:
228 return sizeof(GLushort
);
229 case GL_UNSIGNED_SHORT_4_4_4_4
:
230 return sizeof(GLushort
);
231 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
232 return sizeof(GLushort
);
233 case GL_UNSIGNED_SHORT_5_5_5_1
:
234 return sizeof(GLushort
);
235 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
236 return sizeof(GLushort
);
237 case GL_UNSIGNED_INT_8_8_8_8
:
238 return sizeof(GLuint
);
239 case GL_UNSIGNED_INT_8_8_8_8_REV
:
240 return sizeof(GLuint
);
241 case GL_UNSIGNED_INT_10_10_10_2
:
242 return sizeof(GLuint
);
243 case GL_UNSIGNED_INT_2_10_10_10_REV
:
244 return sizeof(GLuint
);
245 case GL_UNSIGNED_SHORT_8_8_MESA
:
246 case GL_UNSIGNED_SHORT_8_8_REV_MESA
:
247 return sizeof(GLushort
);
248 case GL_UNSIGNED_INT_24_8_EXT
:
249 return sizeof(GLuint
);
257 * Get the number of components in a pixel format.
259 * \param format pixel format.
261 * \return the number of components in the given format, or -1 if a bad format.
264 _mesa_components_in_format( GLenum format
)
268 case GL_COLOR_INDEX1_EXT
:
269 case GL_COLOR_INDEX2_EXT
:
270 case GL_COLOR_INDEX4_EXT
:
271 case GL_COLOR_INDEX8_EXT
:
272 case GL_COLOR_INDEX12_EXT
:
273 case GL_COLOR_INDEX16_EXT
:
274 case GL_STENCIL_INDEX
:
275 case GL_DEPTH_COMPONENT
:
283 case GL_LUMINANCE_ALPHA
:
297 case GL_DEPTH_STENCIL_EXT
:
309 * Get the bytes per pixel of pixel format type pair.
311 * \param format pixel format.
312 * \param type pixel type.
314 * \return bytes per pixel, or -1 if a bad format or type was given.
317 _mesa_bytes_per_pixel( GLenum format
, GLenum type
)
319 GLint comps
= _mesa_components_in_format( format
);
325 return 0; /* special case */
327 case GL_UNSIGNED_BYTE
:
328 return comps
* sizeof(GLubyte
);
330 case GL_UNSIGNED_SHORT
:
331 return comps
* sizeof(GLshort
);
333 case GL_UNSIGNED_INT
:
334 return comps
* sizeof(GLint
);
336 return comps
* sizeof(GLfloat
);
337 case GL_HALF_FLOAT_ARB
:
338 return comps
* sizeof(GLhalfARB
);
339 case GL_UNSIGNED_BYTE_3_3_2
:
340 case GL_UNSIGNED_BYTE_2_3_3_REV
:
341 if (format
== GL_RGB
|| format
== GL_BGR
)
342 return sizeof(GLubyte
);
344 return -1; /* error */
345 case GL_UNSIGNED_SHORT_5_6_5
:
346 case GL_UNSIGNED_SHORT_5_6_5_REV
:
347 if (format
== GL_RGB
|| format
== GL_BGR
)
348 return sizeof(GLushort
);
350 return -1; /* error */
351 case GL_UNSIGNED_SHORT_4_4_4_4
:
352 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
353 case GL_UNSIGNED_SHORT_5_5_5_1
:
354 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
355 if (format
== GL_RGBA
|| format
== GL_BGRA
|| format
== GL_ABGR_EXT
)
356 return sizeof(GLushort
);
359 case GL_UNSIGNED_INT_8_8_8_8
:
360 case GL_UNSIGNED_INT_8_8_8_8_REV
:
361 case GL_UNSIGNED_INT_10_10_10_2
:
362 case GL_UNSIGNED_INT_2_10_10_10_REV
:
363 if (format
== GL_RGBA
|| format
== GL_BGRA
|| format
== GL_ABGR_EXT
)
364 return sizeof(GLuint
);
367 case GL_UNSIGNED_SHORT_8_8_MESA
:
368 case GL_UNSIGNED_SHORT_8_8_REV_MESA
:
369 if (format
== GL_YCBCR_MESA
)
370 return sizeof(GLushort
);
373 case GL_UNSIGNED_INT_24_8_EXT
:
374 if (format
== GL_DEPTH_STENCIL_EXT
)
375 return sizeof(GLuint
);
385 * Test for a legal pixel format and type.
387 * \param format pixel format.
388 * \param type pixel type.
390 * \return GL_TRUE if the given pixel format and type are legal, or GL_FALSE
394 _mesa_is_legal_format_and_type( GLcontext
*ctx
, GLenum format
, GLenum type
)
398 case GL_STENCIL_INDEX
:
402 case GL_UNSIGNED_BYTE
:
404 case GL_UNSIGNED_SHORT
:
406 case GL_UNSIGNED_INT
:
409 case GL_HALF_FLOAT_ARB
:
410 return ctx
->Extensions
.ARB_half_float_pixel
;
418 #if 0 /* not legal! see table 3.6 of the 1.5 spec */
422 case GL_LUMINANCE_ALPHA
:
423 case GL_DEPTH_COMPONENT
:
426 case GL_UNSIGNED_BYTE
:
428 case GL_UNSIGNED_SHORT
:
430 case GL_UNSIGNED_INT
:
433 case GL_HALF_FLOAT_ARB
:
434 return ctx
->Extensions
.ARB_half_float_pixel
;
441 case GL_UNSIGNED_BYTE
:
443 case GL_UNSIGNED_SHORT
:
445 case GL_UNSIGNED_INT
:
447 case GL_UNSIGNED_BYTE_3_3_2
:
448 case GL_UNSIGNED_BYTE_2_3_3_REV
:
449 case GL_UNSIGNED_SHORT_5_6_5
:
450 case GL_UNSIGNED_SHORT_5_6_5_REV
:
452 case GL_HALF_FLOAT_ARB
:
453 return ctx
->Extensions
.ARB_half_float_pixel
;
459 /* NOTE: no packed types are supported with BGR. That's
460 * intentional, according to the GL spec.
463 case GL_UNSIGNED_BYTE
:
465 case GL_UNSIGNED_SHORT
:
467 case GL_UNSIGNED_INT
:
470 case GL_HALF_FLOAT_ARB
:
471 return ctx
->Extensions
.ARB_half_float_pixel
;
480 case GL_UNSIGNED_BYTE
:
482 case GL_UNSIGNED_SHORT
:
484 case GL_UNSIGNED_INT
:
486 case GL_UNSIGNED_SHORT_4_4_4_4
:
487 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
488 case GL_UNSIGNED_SHORT_5_5_5_1
:
489 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
490 case GL_UNSIGNED_INT_8_8_8_8
:
491 case GL_UNSIGNED_INT_8_8_8_8_REV
:
492 case GL_UNSIGNED_INT_10_10_10_2
:
493 case GL_UNSIGNED_INT_2_10_10_10_REV
:
495 case GL_HALF_FLOAT_ARB
:
496 return ctx
->Extensions
.ARB_half_float_pixel
;
501 if (type
== GL_UNSIGNED_SHORT_8_8_MESA
||
502 type
== GL_UNSIGNED_SHORT_8_8_REV_MESA
)
506 case GL_DEPTH_STENCIL_EXT
:
507 if (ctx
->Extensions
.EXT_packed_depth_stencil
508 && type
== GL_UNSIGNED_INT_24_8_EXT
)
516 case GL_UNSIGNED_BYTE
:
518 case GL_UNSIGNED_SHORT
:
520 case GL_UNSIGNED_INT
:
534 * Test if the given image format is a color/RGBA format (i.e., not color
535 * index, depth, stencil, etc).
536 * \param format the image format value (may by an internal texture format)
537 * \return GL_TRUE if its a color/RGBA format, GL_FALSE otherwise.
540 _mesa_is_color_format(GLenum format
)
558 case GL_LUMINANCE_ALPHA
:
559 case GL_LUMINANCE4_ALPHA4
:
560 case GL_LUMINANCE6_ALPHA2
:
561 case GL_LUMINANCE8_ALPHA8
:
562 case GL_LUMINANCE12_ALPHA4
:
563 case GL_LUMINANCE12_ALPHA12
:
564 case GL_LUMINANCE16_ALPHA16
:
591 /* float texture formats */
592 case GL_ALPHA16F_ARB
:
593 case GL_ALPHA32F_ARB
:
594 case GL_LUMINANCE16F_ARB
:
595 case GL_LUMINANCE32F_ARB
:
596 case GL_LUMINANCE_ALPHA16F_ARB
:
597 case GL_LUMINANCE_ALPHA32F_ARB
:
598 case GL_INTENSITY16F_ARB
:
599 case GL_INTENSITY32F_ARB
:
604 /* compressed formats */
605 case GL_COMPRESSED_ALPHA
:
606 case GL_COMPRESSED_LUMINANCE
:
607 case GL_COMPRESSED_LUMINANCE_ALPHA
:
608 case GL_COMPRESSED_INTENSITY
:
609 case GL_COMPRESSED_RGB
:
610 case GL_COMPRESSED_RGBA
:
615 case GL_COMPRESSED_RGB_S3TC_DXT1_EXT
:
616 case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT
:
617 case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT
:
618 case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT
:
619 case GL_COMPRESSED_RGB_FXT1_3DFX
:
620 case GL_COMPRESSED_RGBA_FXT1_3DFX
:
621 #if FEATURE_EXT_texture_sRGB
624 case GL_SRGB_ALPHA_EXT
:
625 case GL_SRGB8_ALPHA8_EXT
:
626 case GL_SLUMINANCE_ALPHA_EXT
:
627 case GL_SLUMINANCE8_ALPHA8_EXT
:
628 case GL_SLUMINANCE_EXT
:
629 case GL_SLUMINANCE8_EXT
:
630 case GL_COMPRESSED_SRGB_EXT
:
631 case GL_COMPRESSED_SRGB_S3TC_DXT1_EXT
:
632 case GL_COMPRESSED_SRGB_ALPHA_EXT
:
633 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT
:
634 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT
:
635 case GL_COMPRESSED_SRGB_ALPHA_S3TC_DXT5_EXT
:
636 case GL_COMPRESSED_SLUMINANCE_EXT
:
637 case GL_COMPRESSED_SLUMINANCE_ALPHA_EXT
:
638 #endif /* FEATURE_EXT_texture_sRGB */
640 /* signed texture formats */
644 case GL_YCBCR_MESA
: /* not considered to be RGB */
653 * Test if the given image format is a color index format.
656 _mesa_is_index_format(GLenum format
)
660 case GL_COLOR_INDEX1_EXT
:
661 case GL_COLOR_INDEX2_EXT
:
662 case GL_COLOR_INDEX4_EXT
:
663 case GL_COLOR_INDEX8_EXT
:
664 case GL_COLOR_INDEX12_EXT
:
665 case GL_COLOR_INDEX16_EXT
:
674 * Test if the given image format is a depth component format.
677 _mesa_is_depth_format(GLenum format
)
680 case GL_DEPTH_COMPONENT
:
681 case GL_DEPTH_COMPONENT16
:
682 case GL_DEPTH_COMPONENT24
:
683 case GL_DEPTH_COMPONENT32
:
692 * Test if the given image format is a stencil format.
695 _mesa_is_stencil_format(GLenum format
)
698 case GL_STENCIL_INDEX
:
699 case GL_DEPTH_STENCIL
:
708 * Test if the given image format is a YCbCr format.
711 _mesa_is_ycbcr_format(GLenum format
)
723 * Test if the given image format is a depth+stencil format.
726 _mesa_is_depthstencil_format(GLenum format
)
729 case GL_DEPTH24_STENCIL8_EXT
:
730 case GL_DEPTH_STENCIL_EXT
:
738 * Test if the given image format is a dudv format.
741 _mesa_is_dudv_format(GLenum format
)
754 * Return the address of a specific pixel in an image (1D, 2D or 3D).
756 * Pixel unpacking/packing parameters are observed according to \p packing.
758 * \param dimensions either 1, 2 or 3 to indicate dimensionality of image
759 * \param image starting address of image data
760 * \param width the image width
761 * \param height theimage height
762 * \param format the pixel format
763 * \param type the pixel data type
764 * \param packing the pixelstore attributes
765 * \param img which image in the volume (0 for 1D or 2D images)
766 * \param row row of pixel in the image (0 for 1D images)
767 * \param column column of pixel in the image
769 * \return address of pixel on success, or NULL on error.
771 * \sa gl_pixelstore_attrib.
774 _mesa_image_address( GLuint dimensions
,
775 const struct gl_pixelstore_attrib
*packing
,
777 GLsizei width
, GLsizei height
,
778 GLenum format
, GLenum type
,
779 GLint img
, GLint row
, GLint column
)
781 GLint alignment
; /* 1, 2 or 4 */
782 GLint pixels_per_row
;
783 GLint rows_per_image
;
786 GLint skipimages
; /* for 3-D volume images */
789 ASSERT(dimensions
>= 1 && dimensions
<= 3);
791 alignment
= packing
->Alignment
;
792 if (packing
->RowLength
> 0) {
793 pixels_per_row
= packing
->RowLength
;
796 pixels_per_row
= width
;
798 if (packing
->ImageHeight
> 0) {
799 rows_per_image
= packing
->ImageHeight
;
802 rows_per_image
= height
;
805 skippixels
= packing
->SkipPixels
;
806 /* Note: SKIP_ROWS _is_ used for 1D images */
807 skiprows
= packing
->SkipRows
;
808 /* Note: SKIP_IMAGES is only used for 3D images */
809 skipimages
= (dimensions
== 3) ? packing
->SkipImages
: 0;
811 if (type
== GL_BITMAP
) {
813 GLint comp_per_pixel
; /* components per pixel */
814 GLint bytes_per_comp
; /* bytes per component */
816 GLint bytes_per_image
;
818 /* Compute bytes per component */
819 bytes_per_comp
= _mesa_sizeof_packed_type( type
);
820 if (bytes_per_comp
< 0) {
824 /* Compute number of components per pixel */
825 comp_per_pixel
= _mesa_components_in_format( format
);
826 if (comp_per_pixel
< 0) {
830 bytes_per_row
= alignment
831 * CEILING( comp_per_pixel
*pixels_per_row
, 8*alignment
);
833 bytes_per_image
= bytes_per_row
* rows_per_image
;
835 pixel_addr
= (GLubyte
*) image
836 + (skipimages
+ img
) * bytes_per_image
837 + (skiprows
+ row
) * bytes_per_row
838 + (skippixels
+ column
) / 8;
841 /* Non-BITMAP data */
842 GLint bytes_per_pixel
, bytes_per_row
, remainder
, bytes_per_image
;
845 bytes_per_pixel
= _mesa_bytes_per_pixel( format
, type
);
847 /* The pixel type and format should have been error checked earlier */
848 assert(bytes_per_pixel
> 0);
850 bytes_per_row
= pixels_per_row
* bytes_per_pixel
;
851 remainder
= bytes_per_row
% alignment
;
853 bytes_per_row
+= (alignment
- remainder
);
855 ASSERT(bytes_per_row
% alignment
== 0);
857 bytes_per_image
= bytes_per_row
* rows_per_image
;
859 if (packing
->Invert
) {
860 /* set pixel_addr to the last row */
861 topOfImage
= bytes_per_row
* (height
- 1);
862 bytes_per_row
= -bytes_per_row
;
868 /* compute final pixel address */
869 pixel_addr
= (GLubyte
*) image
870 + (skipimages
+ img
) * bytes_per_image
872 + (skiprows
+ row
) * bytes_per_row
873 + (skippixels
+ column
) * bytes_per_pixel
;
876 return (GLvoid
*) pixel_addr
;
881 _mesa_image_address1d( const struct gl_pixelstore_attrib
*packing
,
884 GLenum format
, GLenum type
,
887 return _mesa_image_address(1, packing
, image
, width
, 1,
888 format
, type
, 0, 0, column
);
893 _mesa_image_address2d( const struct gl_pixelstore_attrib
*packing
,
895 GLsizei width
, GLsizei height
,
896 GLenum format
, GLenum type
,
897 GLint row
, GLint column
)
899 return _mesa_image_address(2, packing
, image
, width
, height
,
900 format
, type
, 0, row
, column
);
905 _mesa_image_address3d( const struct gl_pixelstore_attrib
*packing
,
907 GLsizei width
, GLsizei height
,
908 GLenum format
, GLenum type
,
909 GLint img
, GLint row
, GLint column
)
911 return _mesa_image_address(3, packing
, image
, width
, height
,
912 format
, type
, img
, row
, column
);
918 * Compute the stride (in bytes) between image rows.
920 * \param packing the pixelstore attributes
921 * \param width image width.
922 * \param format pixel format.
923 * \param type pixel data type.
925 * \return the stride in bytes for the given parameters, or -1 if error
928 _mesa_image_row_stride( const struct gl_pixelstore_attrib
*packing
,
929 GLint width
, GLenum format
, GLenum type
)
931 GLint bytesPerRow
, remainder
;
935 if (type
== GL_BITMAP
) {
936 if (packing
->RowLength
== 0) {
937 bytesPerRow
= (width
+ 7) / 8;
940 bytesPerRow
= (packing
->RowLength
+ 7) / 8;
944 /* Non-BITMAP data */
945 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
946 if (bytesPerPixel
<= 0)
947 return -1; /* error */
948 if (packing
->RowLength
== 0) {
949 bytesPerRow
= bytesPerPixel
* width
;
952 bytesPerRow
= bytesPerPixel
* packing
->RowLength
;
956 remainder
= bytesPerRow
% packing
->Alignment
;
958 bytesPerRow
+= (packing
->Alignment
- remainder
);
961 if (packing
->Invert
) {
962 /* negate the bytes per row (negative row stride) */
963 bytesPerRow
= -bytesPerRow
;
973 * Compute the stride between images in a 3D texture (in bytes) for the given
974 * pixel packing parameters and image width, format and type.
977 _mesa_image_image_stride( const struct gl_pixelstore_attrib
*packing
,
978 GLint width
, GLint height
,
979 GLenum format
, GLenum type
)
981 GLint bytesPerRow
, bytesPerImage
, remainder
;
985 if (type
== GL_BITMAP
) {
986 if (packing
->RowLength
== 0) {
987 bytesPerRow
= (width
+ 7) / 8;
990 bytesPerRow
= (packing
->RowLength
+ 7) / 8;
994 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
996 if (bytesPerPixel
<= 0)
997 return -1; /* error */
998 if (packing
->RowLength
== 0) {
999 bytesPerRow
= bytesPerPixel
* width
;
1002 bytesPerRow
= bytesPerPixel
* packing
->RowLength
;
1006 remainder
= bytesPerRow
% packing
->Alignment
;
1008 bytesPerRow
+= (packing
->Alignment
- remainder
);
1010 if (packing
->ImageHeight
== 0)
1011 bytesPerImage
= bytesPerRow
* height
;
1013 bytesPerImage
= bytesPerRow
* packing
->ImageHeight
;
1015 return bytesPerImage
;
1020 * Unpack a 32x32 pixel polygon stipple from user memory using the
1021 * current pixel unpack settings.
1024 _mesa_unpack_polygon_stipple( const GLubyte
*pattern
, GLuint dest
[32],
1025 const struct gl_pixelstore_attrib
*unpacking
)
1027 GLubyte
*ptrn
= (GLubyte
*) _mesa_unpack_bitmap(32, 32, pattern
, unpacking
);
1029 /* Convert pattern from GLubytes to GLuints and handle big/little
1030 * endian differences
1034 for (i
= 0; i
< 32; i
++) {
1035 dest
[i
] = (p
[0] << 24)
1047 * Pack polygon stipple into user memory given current pixel packing
1051 _mesa_pack_polygon_stipple( const GLuint pattern
[32], GLubyte
*dest
,
1052 const struct gl_pixelstore_attrib
*packing
)
1054 /* Convert pattern from GLuints to GLubytes to handle big/little
1055 * endian differences.
1059 for (i
= 0; i
< 32; i
++) {
1060 ptrn
[i
* 4 + 0] = (GLubyte
) ((pattern
[i
] >> 24) & 0xff);
1061 ptrn
[i
* 4 + 1] = (GLubyte
) ((pattern
[i
] >> 16) & 0xff);
1062 ptrn
[i
* 4 + 2] = (GLubyte
) ((pattern
[i
] >> 8 ) & 0xff);
1063 ptrn
[i
* 4 + 3] = (GLubyte
) ((pattern
[i
] ) & 0xff);
1066 _mesa_pack_bitmap(32, 32, ptrn
, dest
, packing
);
1071 * Unpack bitmap data. Resulting data will be in most-significant-bit-first
1072 * order with row alignment = 1 byte.
1075 _mesa_unpack_bitmap( GLint width
, GLint height
, const GLubyte
*pixels
,
1076 const struct gl_pixelstore_attrib
*packing
)
1078 GLint bytes
, row
, width_in_bytes
;
1079 GLubyte
*buffer
, *dst
;
1084 /* Alloc dest storage */
1085 bytes
= ((width
+ 7) / 8 * height
);
1086 buffer
= (GLubyte
*) malloc( bytes
);
1090 width_in_bytes
= CEILING( width
, 8 );
1092 for (row
= 0; row
< height
; row
++) {
1093 const GLubyte
*src
= (const GLubyte
*)
1094 _mesa_image_address2d(packing
, pixels
, width
, height
,
1095 GL_COLOR_INDEX
, GL_BITMAP
, row
, 0);
1101 if ((packing
->SkipPixels
& 7) == 0) {
1102 memcpy( dst
, src
, width_in_bytes
);
1103 if (packing
->LsbFirst
) {
1104 flip_bytes( dst
, width_in_bytes
);
1108 /* handling SkipPixels is a bit tricky (no pun intended!) */
1110 if (packing
->LsbFirst
) {
1111 GLubyte srcMask
= 1 << (packing
->SkipPixels
& 0x7);
1112 GLubyte dstMask
= 128;
1113 const GLubyte
*s
= src
;
1116 for (i
= 0; i
< width
; i
++) {
1120 if (srcMask
== 128) {
1125 srcMask
= srcMask
<< 1;
1133 dstMask
= dstMask
>> 1;
1138 GLubyte srcMask
= 128 >> (packing
->SkipPixels
& 0x7);
1139 GLubyte dstMask
= 128;
1140 const GLubyte
*s
= src
;
1143 for (i
= 0; i
< width
; i
++) {
1152 srcMask
= srcMask
>> 1;
1160 dstMask
= dstMask
>> 1;
1165 dst
+= width_in_bytes
;
1176 _mesa_pack_bitmap( GLint width
, GLint height
, const GLubyte
*source
,
1177 GLubyte
*dest
, const struct gl_pixelstore_attrib
*packing
)
1179 GLint row
, width_in_bytes
;
1185 width_in_bytes
= CEILING( width
, 8 );
1187 for (row
= 0; row
< height
; row
++) {
1188 GLubyte
*dst
= (GLubyte
*) _mesa_image_address2d(packing
, dest
,
1189 width
, height
, GL_COLOR_INDEX
, GL_BITMAP
, row
, 0);
1193 if ((packing
->SkipPixels
& 7) == 0) {
1194 memcpy( dst
, src
, width_in_bytes
);
1195 if (packing
->LsbFirst
) {
1196 flip_bytes( dst
, width_in_bytes
);
1200 /* handling SkipPixels is a bit tricky (no pun intended!) */
1202 if (packing
->LsbFirst
) {
1203 GLubyte srcMask
= 128;
1204 GLubyte dstMask
= 1 << (packing
->SkipPixels
& 0x7);
1205 const GLubyte
*s
= src
;
1208 for (i
= 0; i
< width
; i
++) {
1217 srcMask
= srcMask
>> 1;
1219 if (dstMask
== 128) {
1225 dstMask
= dstMask
<< 1;
1230 GLubyte srcMask
= 128;
1231 GLubyte dstMask
= 128 >> (packing
->SkipPixels
& 0x7);
1232 const GLubyte
*s
= src
;
1235 for (i
= 0; i
< width
; i
++) {
1244 srcMask
= srcMask
>> 1;
1252 dstMask
= dstMask
>> 1;
1257 src
+= width_in_bytes
;
1263 * "Expand" a bitmap from 1-bit per pixel to 8-bits per pixel.
1264 * This is typically used to convert a bitmap into a GLubyte/pixel texture.
1265 * "On" bits will set texels to \p onValue.
1266 * "Off" bits will not modify texels.
1267 * \param width src bitmap width in pixels
1268 * \param height src bitmap height in pixels
1269 * \param unpack bitmap unpacking state
1270 * \param bitmap the src bitmap data
1271 * \param destBuffer start of dest buffer
1272 * \param destStride row stride in dest buffer
1273 * \param onValue if bit is 1, set destBuffer pixel to this value
1276 _mesa_expand_bitmap(GLsizei width
, GLsizei height
,
1277 const struct gl_pixelstore_attrib
*unpack
,
1278 const GLubyte
*bitmap
,
1279 GLubyte
*destBuffer
, GLint destStride
,
1282 const GLubyte
*srcRow
= (const GLubyte
*)
1283 _mesa_image_address2d(unpack
, bitmap
, width
, height
,
1284 GL_COLOR_INDEX
, GL_BITMAP
, 0, 0);
1285 const GLint srcStride
= _mesa_image_row_stride(unpack
, width
,
1286 GL_COLOR_INDEX
, GL_BITMAP
);
1289 #define SET_PIXEL(COL, ROW) \
1290 destBuffer[(ROW) * destStride + (COL)] = onValue;
1292 for (row
= 0; row
< height
; row
++) {
1293 const GLubyte
*src
= srcRow
;
1295 if (unpack
->LsbFirst
) {
1297 GLubyte mask
= 1U << (unpack
->SkipPixels
& 0x7);
1298 for (col
= 0; col
< width
; col
++) {
1301 SET_PIXEL(col
, row
);
1313 /* get ready for next row */
1319 GLubyte mask
= 128U >> (unpack
->SkipPixels
& 0x7);
1320 for (col
= 0; col
< width
; col
++) {
1323 SET_PIXEL(col
, row
);
1335 /* get ready for next row */
1340 srcRow
+= srcStride
;
1347 /**********************************************************************/
1348 /***** Pixel processing functions ******/
1349 /**********************************************************************/
1352 * Apply scale and bias factors to an array of RGBA pixels.
1355 _mesa_scale_and_bias_rgba(GLuint n
, GLfloat rgba
[][4],
1356 GLfloat rScale
, GLfloat gScale
,
1357 GLfloat bScale
, GLfloat aScale
,
1358 GLfloat rBias
, GLfloat gBias
,
1359 GLfloat bBias
, GLfloat aBias
)
1361 if (rScale
!= 1.0 || rBias
!= 0.0) {
1363 for (i
= 0; i
< n
; i
++) {
1364 rgba
[i
][RCOMP
] = rgba
[i
][RCOMP
] * rScale
+ rBias
;
1367 if (gScale
!= 1.0 || gBias
!= 0.0) {
1369 for (i
= 0; i
< n
; i
++) {
1370 rgba
[i
][GCOMP
] = rgba
[i
][GCOMP
] * gScale
+ gBias
;
1373 if (bScale
!= 1.0 || bBias
!= 0.0) {
1375 for (i
= 0; i
< n
; i
++) {
1376 rgba
[i
][BCOMP
] = rgba
[i
][BCOMP
] * bScale
+ bBias
;
1379 if (aScale
!= 1.0 || aBias
!= 0.0) {
1381 for (i
= 0; i
< n
; i
++) {
1382 rgba
[i
][ACOMP
] = rgba
[i
][ACOMP
] * aScale
+ aBias
;
1389 * Apply pixel mapping to an array of floating point RGBA pixels.
1392 _mesa_map_rgba( const GLcontext
*ctx
, GLuint n
, GLfloat rgba
[][4] )
1394 const GLfloat rscale
= (GLfloat
) (ctx
->PixelMaps
.RtoR
.Size
- 1);
1395 const GLfloat gscale
= (GLfloat
) (ctx
->PixelMaps
.GtoG
.Size
- 1);
1396 const GLfloat bscale
= (GLfloat
) (ctx
->PixelMaps
.BtoB
.Size
- 1);
1397 const GLfloat ascale
= (GLfloat
) (ctx
->PixelMaps
.AtoA
.Size
- 1);
1398 const GLfloat
*rMap
= ctx
->PixelMaps
.RtoR
.Map
;
1399 const GLfloat
*gMap
= ctx
->PixelMaps
.GtoG
.Map
;
1400 const GLfloat
*bMap
= ctx
->PixelMaps
.BtoB
.Map
;
1401 const GLfloat
*aMap
= ctx
->PixelMaps
.AtoA
.Map
;
1404 GLfloat r
= CLAMP(rgba
[i
][RCOMP
], 0.0F
, 1.0F
);
1405 GLfloat g
= CLAMP(rgba
[i
][GCOMP
], 0.0F
, 1.0F
);
1406 GLfloat b
= CLAMP(rgba
[i
][BCOMP
], 0.0F
, 1.0F
);
1407 GLfloat a
= CLAMP(rgba
[i
][ACOMP
], 0.0F
, 1.0F
);
1408 rgba
[i
][RCOMP
] = rMap
[IROUND(r
* rscale
)];
1409 rgba
[i
][GCOMP
] = gMap
[IROUND(g
* gscale
)];
1410 rgba
[i
][BCOMP
] = bMap
[IROUND(b
* bscale
)];
1411 rgba
[i
][ACOMP
] = aMap
[IROUND(a
* ascale
)];
1417 * Apply the color matrix and post color matrix scaling and biasing.
1420 _mesa_transform_rgba(const GLcontext
*ctx
, GLuint n
, GLfloat rgba
[][4])
1422 const GLfloat rs
= ctx
->Pixel
.PostColorMatrixScale
[0];
1423 const GLfloat rb
= ctx
->Pixel
.PostColorMatrixBias
[0];
1424 const GLfloat gs
= ctx
->Pixel
.PostColorMatrixScale
[1];
1425 const GLfloat gb
= ctx
->Pixel
.PostColorMatrixBias
[1];
1426 const GLfloat bs
= ctx
->Pixel
.PostColorMatrixScale
[2];
1427 const GLfloat bb
= ctx
->Pixel
.PostColorMatrixBias
[2];
1428 const GLfloat as
= ctx
->Pixel
.PostColorMatrixScale
[3];
1429 const GLfloat ab
= ctx
->Pixel
.PostColorMatrixBias
[3];
1430 const GLfloat
*m
= ctx
->ColorMatrixStack
.Top
->m
;
1432 for (i
= 0; i
< n
; i
++) {
1433 const GLfloat r
= rgba
[i
][RCOMP
];
1434 const GLfloat g
= rgba
[i
][GCOMP
];
1435 const GLfloat b
= rgba
[i
][BCOMP
];
1436 const GLfloat a
= rgba
[i
][ACOMP
];
1437 rgba
[i
][RCOMP
] = (m
[0] * r
+ m
[4] * g
+ m
[ 8] * b
+ m
[12] * a
) * rs
+ rb
;
1438 rgba
[i
][GCOMP
] = (m
[1] * r
+ m
[5] * g
+ m
[ 9] * b
+ m
[13] * a
) * gs
+ gb
;
1439 rgba
[i
][BCOMP
] = (m
[2] * r
+ m
[6] * g
+ m
[10] * b
+ m
[14] * a
) * bs
+ bb
;
1440 rgba
[i
][ACOMP
] = (m
[3] * r
+ m
[7] * g
+ m
[11] * b
+ m
[15] * a
) * as
+ ab
;
1446 * Apply a color table lookup to an array of floating point RGBA colors.
1449 _mesa_lookup_rgba_float(const struct gl_color_table
*table
,
1450 GLuint n
, GLfloat rgba
[][4])
1452 const GLint max
= table
->Size
- 1;
1453 const GLfloat scale
= (GLfloat
) max
;
1454 const GLfloat
*lut
= table
->TableF
;
1457 if (!table
->TableF
|| table
->Size
== 0)
1460 switch (table
->_BaseFormat
) {
1462 /* replace RGBA with I */
1463 for (i
= 0; i
< n
; i
++) {
1464 GLint j
= IROUND(rgba
[i
][RCOMP
] * scale
);
1465 GLfloat c
= lut
[CLAMP(j
, 0, max
)];
1473 /* replace RGB with L */
1474 for (i
= 0; i
< n
; i
++) {
1475 GLint j
= IROUND(rgba
[i
][RCOMP
] * scale
);
1476 GLfloat c
= lut
[CLAMP(j
, 0, max
)];
1483 /* replace A with A */
1484 for (i
= 0; i
< n
; i
++) {
1485 GLint j
= IROUND(rgba
[i
][ACOMP
] * scale
);
1486 rgba
[i
][ACOMP
] = lut
[CLAMP(j
, 0, max
)];
1489 case GL_LUMINANCE_ALPHA
:
1490 /* replace RGBA with LLLA */
1491 for (i
= 0; i
< n
; i
++) {
1492 GLint jL
= IROUND(rgba
[i
][RCOMP
] * scale
);
1493 GLint jA
= IROUND(rgba
[i
][ACOMP
] * scale
);
1494 GLfloat luminance
, alpha
;
1495 jL
= CLAMP(jL
, 0, max
);
1496 jA
= CLAMP(jA
, 0, max
);
1497 luminance
= lut
[jL
* 2 + 0];
1498 alpha
= lut
[jA
* 2 + 1];
1501 rgba
[i
][BCOMP
] = luminance
;
1502 rgba
[i
][ACOMP
] = alpha
;;
1506 /* replace RGB with RGB */
1507 for (i
= 0; i
< n
; i
++) {
1508 GLint jR
= IROUND(rgba
[i
][RCOMP
] * scale
);
1509 GLint jG
= IROUND(rgba
[i
][GCOMP
] * scale
);
1510 GLint jB
= IROUND(rgba
[i
][BCOMP
] * scale
);
1511 jR
= CLAMP(jR
, 0, max
);
1512 jG
= CLAMP(jG
, 0, max
);
1513 jB
= CLAMP(jB
, 0, max
);
1514 rgba
[i
][RCOMP
] = lut
[jR
* 3 + 0];
1515 rgba
[i
][GCOMP
] = lut
[jG
* 3 + 1];
1516 rgba
[i
][BCOMP
] = lut
[jB
* 3 + 2];
1520 /* replace RGBA with RGBA */
1521 for (i
= 0; i
< n
; i
++) {
1522 GLint jR
= IROUND(rgba
[i
][RCOMP
] * scale
);
1523 GLint jG
= IROUND(rgba
[i
][GCOMP
] * scale
);
1524 GLint jB
= IROUND(rgba
[i
][BCOMP
] * scale
);
1525 GLint jA
= IROUND(rgba
[i
][ACOMP
] * scale
);
1526 jR
= CLAMP(jR
, 0, max
);
1527 jG
= CLAMP(jG
, 0, max
);
1528 jB
= CLAMP(jB
, 0, max
);
1529 jA
= CLAMP(jA
, 0, max
);
1530 rgba
[i
][RCOMP
] = lut
[jR
* 4 + 0];
1531 rgba
[i
][GCOMP
] = lut
[jG
* 4 + 1];
1532 rgba
[i
][BCOMP
] = lut
[jB
* 4 + 2];
1533 rgba
[i
][ACOMP
] = lut
[jA
* 4 + 3];
1537 _mesa_problem(NULL
, "Bad format in _mesa_lookup_rgba_float");
1545 * Apply a color table lookup to an array of ubyte/RGBA colors.
1548 _mesa_lookup_rgba_ubyte(const struct gl_color_table
*table
,
1549 GLuint n
, GLubyte rgba
[][4])
1551 const GLubyte
*lut
= table
->TableUB
;
1552 const GLfloat scale
= (GLfloat
) (table
->Size
- 1) / (GLfloat
)255.0;
1555 if (!table
->TableUB
|| table
->Size
== 0)
1558 switch (table
->_BaseFormat
) {
1560 /* replace RGBA with I */
1561 if (table
->Size
== 256) {
1562 for (i
= 0; i
< n
; i
++) {
1563 const GLubyte c
= lut
[rgba
[i
][RCOMP
]];
1571 for (i
= 0; i
< n
; i
++) {
1572 GLint j
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1576 rgba
[i
][ACOMP
] = lut
[j
];
1581 /* replace RGB with L */
1582 if (table
->Size
== 256) {
1583 for (i
= 0; i
< n
; i
++) {
1584 const GLubyte c
= lut
[rgba
[i
][RCOMP
]];
1591 for (i
= 0; i
< n
; i
++) {
1592 GLint j
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1595 rgba
[i
][BCOMP
] = lut
[j
];
1600 /* replace A with A */
1601 if (table
->Size
== 256) {
1602 for (i
= 0; i
< n
; i
++) {
1603 rgba
[i
][ACOMP
] = lut
[rgba
[i
][ACOMP
]];
1607 for (i
= 0; i
< n
; i
++) {
1608 GLint j
= IROUND((GLfloat
) rgba
[i
][ACOMP
] * scale
);
1609 rgba
[i
][ACOMP
] = lut
[j
];
1613 case GL_LUMINANCE_ALPHA
:
1614 /* replace RGBA with LLLA */
1615 if (table
->Size
== 256) {
1616 for (i
= 0; i
< n
; i
++) {
1617 GLubyte l
= lut
[rgba
[i
][RCOMP
] * 2 + 0];
1618 GLubyte a
= lut
[rgba
[i
][ACOMP
] * 2 + 1];;
1626 for (i
= 0; i
< n
; i
++) {
1627 GLint jL
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1628 GLint jA
= IROUND((GLfloat
) rgba
[i
][ACOMP
] * scale
);
1629 GLubyte luminance
= lut
[jL
* 2 + 0];
1630 GLubyte alpha
= lut
[jA
* 2 + 1];
1633 rgba
[i
][BCOMP
] = luminance
;
1634 rgba
[i
][ACOMP
] = alpha
;
1639 if (table
->Size
== 256) {
1640 for (i
= 0; i
< n
; i
++) {
1641 rgba
[i
][RCOMP
] = lut
[rgba
[i
][RCOMP
] * 3 + 0];
1642 rgba
[i
][GCOMP
] = lut
[rgba
[i
][GCOMP
] * 3 + 1];
1643 rgba
[i
][BCOMP
] = lut
[rgba
[i
][BCOMP
] * 3 + 2];
1647 for (i
= 0; i
< n
; i
++) {
1648 GLint jR
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1649 GLint jG
= IROUND((GLfloat
) rgba
[i
][GCOMP
] * scale
);
1650 GLint jB
= IROUND((GLfloat
) rgba
[i
][BCOMP
] * scale
);
1651 rgba
[i
][RCOMP
] = lut
[jR
* 3 + 0];
1652 rgba
[i
][GCOMP
] = lut
[jG
* 3 + 1];
1653 rgba
[i
][BCOMP
] = lut
[jB
* 3 + 2];
1658 if (table
->Size
== 256) {
1659 for (i
= 0; i
< n
; i
++) {
1660 rgba
[i
][RCOMP
] = lut
[rgba
[i
][RCOMP
] * 4 + 0];
1661 rgba
[i
][GCOMP
] = lut
[rgba
[i
][GCOMP
] * 4 + 1];
1662 rgba
[i
][BCOMP
] = lut
[rgba
[i
][BCOMP
] * 4 + 2];
1663 rgba
[i
][ACOMP
] = lut
[rgba
[i
][ACOMP
] * 4 + 3];
1667 for (i
= 0; i
< n
; i
++) {
1668 GLint jR
= IROUND((GLfloat
) rgba
[i
][RCOMP
] * scale
);
1669 GLint jG
= IROUND((GLfloat
) rgba
[i
][GCOMP
] * scale
);
1670 GLint jB
= IROUND((GLfloat
) rgba
[i
][BCOMP
] * scale
);
1671 GLint jA
= IROUND((GLfloat
) rgba
[i
][ACOMP
] * scale
);
1672 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][RCOMP
], lut
[jR
* 4 + 0]);
1673 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][GCOMP
], lut
[jG
* 4 + 1]);
1674 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][BCOMP
], lut
[jB
* 4 + 2]);
1675 CLAMPED_FLOAT_TO_CHAN(rgba
[i
][ACOMP
], lut
[jA
* 4 + 3]);
1680 _mesa_problem(NULL
, "Bad format in _mesa_lookup_rgba_chan");
1688 * Map color indexes to float rgba values.
1691 _mesa_map_ci_to_rgba( const GLcontext
*ctx
, GLuint n
,
1692 const GLuint index
[], GLfloat rgba
[][4] )
1694 GLuint rmask
= ctx
->PixelMaps
.ItoR
.Size
- 1;
1695 GLuint gmask
= ctx
->PixelMaps
.ItoG
.Size
- 1;
1696 GLuint bmask
= ctx
->PixelMaps
.ItoB
.Size
- 1;
1697 GLuint amask
= ctx
->PixelMaps
.ItoA
.Size
- 1;
1698 const GLfloat
*rMap
= ctx
->PixelMaps
.ItoR
.Map
;
1699 const GLfloat
*gMap
= ctx
->PixelMaps
.ItoG
.Map
;
1700 const GLfloat
*bMap
= ctx
->PixelMaps
.ItoB
.Map
;
1701 const GLfloat
*aMap
= ctx
->PixelMaps
.ItoA
.Map
;
1704 rgba
[i
][RCOMP
] = rMap
[index
[i
] & rmask
];
1705 rgba
[i
][GCOMP
] = gMap
[index
[i
] & gmask
];
1706 rgba
[i
][BCOMP
] = bMap
[index
[i
] & bmask
];
1707 rgba
[i
][ACOMP
] = aMap
[index
[i
] & amask
];
1713 * Map ubyte color indexes to ubyte/RGBA values.
1716 _mesa_map_ci8_to_rgba8(const GLcontext
*ctx
, GLuint n
, const GLubyte index
[],
1719 GLuint rmask
= ctx
->PixelMaps
.ItoR
.Size
- 1;
1720 GLuint gmask
= ctx
->PixelMaps
.ItoG
.Size
- 1;
1721 GLuint bmask
= ctx
->PixelMaps
.ItoB
.Size
- 1;
1722 GLuint amask
= ctx
->PixelMaps
.ItoA
.Size
- 1;
1723 const GLubyte
*rMap
= ctx
->PixelMaps
.ItoR
.Map8
;
1724 const GLubyte
*gMap
= ctx
->PixelMaps
.ItoG
.Map8
;
1725 const GLubyte
*bMap
= ctx
->PixelMaps
.ItoB
.Map8
;
1726 const GLubyte
*aMap
= ctx
->PixelMaps
.ItoA
.Map8
;
1729 rgba
[i
][RCOMP
] = rMap
[index
[i
] & rmask
];
1730 rgba
[i
][GCOMP
] = gMap
[index
[i
] & gmask
];
1731 rgba
[i
][BCOMP
] = bMap
[index
[i
] & bmask
];
1732 rgba
[i
][ACOMP
] = aMap
[index
[i
] & amask
];
1738 _mesa_scale_and_bias_depth(const GLcontext
*ctx
, GLuint n
,
1739 GLfloat depthValues
[])
1741 const GLfloat scale
= ctx
->Pixel
.DepthScale
;
1742 const GLfloat bias
= ctx
->Pixel
.DepthBias
;
1744 for (i
= 0; i
< n
; i
++) {
1745 GLfloat d
= depthValues
[i
] * scale
+ bias
;
1746 depthValues
[i
] = CLAMP(d
, 0.0F
, 1.0F
);
1752 _mesa_scale_and_bias_depth_uint(const GLcontext
*ctx
, GLuint n
,
1753 GLuint depthValues
[])
1755 const GLdouble max
= (double) 0xffffffff;
1756 const GLdouble scale
= ctx
->Pixel
.DepthScale
;
1757 const GLdouble bias
= ctx
->Pixel
.DepthBias
* max
;
1759 for (i
= 0; i
< n
; i
++) {
1760 GLdouble d
= (GLdouble
) depthValues
[i
] * scale
+ bias
;
1761 d
= CLAMP(d
, 0.0, max
);
1762 depthValues
[i
] = (GLuint
) d
;
1769 * Update the min/max values from an array of fragment colors.
1772 update_minmax(GLcontext
*ctx
, GLuint n
, const GLfloat rgba
[][4])
1775 for (i
= 0; i
< n
; i
++) {
1777 if (rgba
[i
][RCOMP
] < ctx
->MinMax
.Min
[RCOMP
])
1778 ctx
->MinMax
.Min
[RCOMP
] = rgba
[i
][RCOMP
];
1779 if (rgba
[i
][GCOMP
] < ctx
->MinMax
.Min
[GCOMP
])
1780 ctx
->MinMax
.Min
[GCOMP
] = rgba
[i
][GCOMP
];
1781 if (rgba
[i
][BCOMP
] < ctx
->MinMax
.Min
[BCOMP
])
1782 ctx
->MinMax
.Min
[BCOMP
] = rgba
[i
][BCOMP
];
1783 if (rgba
[i
][ACOMP
] < ctx
->MinMax
.Min
[ACOMP
])
1784 ctx
->MinMax
.Min
[ACOMP
] = rgba
[i
][ACOMP
];
1787 if (rgba
[i
][RCOMP
] > ctx
->MinMax
.Max
[RCOMP
])
1788 ctx
->MinMax
.Max
[RCOMP
] = rgba
[i
][RCOMP
];
1789 if (rgba
[i
][GCOMP
] > ctx
->MinMax
.Max
[GCOMP
])
1790 ctx
->MinMax
.Max
[GCOMP
] = rgba
[i
][GCOMP
];
1791 if (rgba
[i
][BCOMP
] > ctx
->MinMax
.Max
[BCOMP
])
1792 ctx
->MinMax
.Max
[BCOMP
] = rgba
[i
][BCOMP
];
1793 if (rgba
[i
][ACOMP
] > ctx
->MinMax
.Max
[ACOMP
])
1794 ctx
->MinMax
.Max
[ACOMP
] = rgba
[i
][ACOMP
];
1800 * Update the histogram values from an array of fragment colors.
1803 update_histogram(GLcontext
*ctx
, GLuint n
, const GLfloat rgba
[][4])
1805 const GLint max
= ctx
->Histogram
.Width
- 1;
1806 GLfloat w
= (GLfloat
) max
;
1809 if (ctx
->Histogram
.Width
== 0)
1812 for (i
= 0; i
< n
; i
++) {
1813 GLint ri
= IROUND(rgba
[i
][RCOMP
] * w
);
1814 GLint gi
= IROUND(rgba
[i
][GCOMP
] * w
);
1815 GLint bi
= IROUND(rgba
[i
][BCOMP
] * w
);
1816 GLint ai
= IROUND(rgba
[i
][ACOMP
] * w
);
1817 ri
= CLAMP(ri
, 0, max
);
1818 gi
= CLAMP(gi
, 0, max
);
1819 bi
= CLAMP(bi
, 0, max
);
1820 ai
= CLAMP(ai
, 0, max
);
1821 ctx
->Histogram
.Count
[ri
][RCOMP
]++;
1822 ctx
->Histogram
.Count
[gi
][GCOMP
]++;
1823 ctx
->Histogram
.Count
[bi
][BCOMP
]++;
1824 ctx
->Histogram
.Count
[ai
][ACOMP
]++;
1830 * Apply various pixel transfer operations to an array of RGBA pixels
1831 * as indicated by the transferOps bitmask
1834 _mesa_apply_rgba_transfer_ops(GLcontext
*ctx
, GLbitfield transferOps
,
1835 GLuint n
, GLfloat rgba
[][4])
1838 if (transferOps
& IMAGE_SCALE_BIAS_BIT
) {
1839 _mesa_scale_and_bias_rgba(n
, rgba
,
1840 ctx
->Pixel
.RedScale
, ctx
->Pixel
.GreenScale
,
1841 ctx
->Pixel
.BlueScale
, ctx
->Pixel
.AlphaScale
,
1842 ctx
->Pixel
.RedBias
, ctx
->Pixel
.GreenBias
,
1843 ctx
->Pixel
.BlueBias
, ctx
->Pixel
.AlphaBias
);
1845 /* color map lookup */
1846 if (transferOps
& IMAGE_MAP_COLOR_BIT
) {
1847 _mesa_map_rgba( ctx
, n
, rgba
);
1849 /* GL_COLOR_TABLE lookup */
1850 if (transferOps
& IMAGE_COLOR_TABLE_BIT
) {
1851 _mesa_lookup_rgba_float(&ctx
->ColorTable
[COLORTABLE_PRECONVOLUTION
], n
, rgba
);
1854 if (transferOps
& IMAGE_CONVOLUTION_BIT
) {
1855 /* this has to be done in the calling code */
1856 _mesa_problem(ctx
, "IMAGE_CONVOLUTION_BIT set in _mesa_apply_transfer_ops");
1858 /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
1859 if (transferOps
& IMAGE_POST_CONVOLUTION_SCALE_BIAS
) {
1860 _mesa_scale_and_bias_rgba(n
, rgba
,
1861 ctx
->Pixel
.PostConvolutionScale
[RCOMP
],
1862 ctx
->Pixel
.PostConvolutionScale
[GCOMP
],
1863 ctx
->Pixel
.PostConvolutionScale
[BCOMP
],
1864 ctx
->Pixel
.PostConvolutionScale
[ACOMP
],
1865 ctx
->Pixel
.PostConvolutionBias
[RCOMP
],
1866 ctx
->Pixel
.PostConvolutionBias
[GCOMP
],
1867 ctx
->Pixel
.PostConvolutionBias
[BCOMP
],
1868 ctx
->Pixel
.PostConvolutionBias
[ACOMP
]);
1870 /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
1871 if (transferOps
& IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT
) {
1872 _mesa_lookup_rgba_float(&ctx
->ColorTable
[COLORTABLE_POSTCONVOLUTION
], n
, rgba
);
1874 /* color matrix transform */
1875 if (transferOps
& IMAGE_COLOR_MATRIX_BIT
) {
1876 _mesa_transform_rgba(ctx
, n
, rgba
);
1878 /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
1879 if (transferOps
& IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT
) {
1880 _mesa_lookup_rgba_float(&ctx
->ColorTable
[COLORTABLE_POSTCOLORMATRIX
], n
, rgba
);
1882 /* update histogram count */
1883 if (transferOps
& IMAGE_HISTOGRAM_BIT
) {
1884 update_histogram(ctx
, n
, (CONST
GLfloat (*)[4]) rgba
);
1886 /* update min/max values */
1887 if (transferOps
& IMAGE_MIN_MAX_BIT
) {
1888 update_minmax(ctx
, n
, (CONST
GLfloat (*)[4]) rgba
);
1890 /* clamping to [0,1] */
1891 if (transferOps
& IMAGE_CLAMP_BIT
) {
1893 for (i
= 0; i
< n
; i
++) {
1894 rgba
[i
][RCOMP
] = CLAMP(rgba
[i
][RCOMP
], 0.0F
, 1.0F
);
1895 rgba
[i
][GCOMP
] = CLAMP(rgba
[i
][GCOMP
], 0.0F
, 1.0F
);
1896 rgba
[i
][BCOMP
] = CLAMP(rgba
[i
][BCOMP
], 0.0F
, 1.0F
);
1897 rgba
[i
][ACOMP
] = CLAMP(rgba
[i
][ACOMP
], 0.0F
, 1.0F
);
1904 * Apply color index shift and offset to an array of pixels.
1907 shift_and_offset_ci( const GLcontext
*ctx
, GLuint n
, GLuint indexes
[] )
1909 GLint shift
= ctx
->Pixel
.IndexShift
;
1910 GLint offset
= ctx
->Pixel
.IndexOffset
;
1914 indexes
[i
] = (indexes
[i
] << shift
) + offset
;
1917 else if (shift
< 0) {
1920 indexes
[i
] = (indexes
[i
] >> shift
) + offset
;
1925 indexes
[i
] = indexes
[i
] + offset
;
1933 * Apply color index shift, offset and table lookup to an array
1937 _mesa_apply_ci_transfer_ops(const GLcontext
*ctx
, GLbitfield transferOps
,
1938 GLuint n
, GLuint indexes
[])
1940 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
1941 shift_and_offset_ci(ctx
, n
, indexes
);
1943 if (transferOps
& IMAGE_MAP_COLOR_BIT
) {
1944 const GLuint mask
= ctx
->PixelMaps
.ItoI
.Size
- 1;
1946 for (i
= 0; i
< n
; i
++) {
1947 const GLuint j
= indexes
[i
] & mask
;
1948 indexes
[i
] = IROUND(ctx
->PixelMaps
.ItoI
.Map
[j
]);
1955 * Apply stencil index shift, offset and table lookup to an array
1956 * of stencil values.
1959 _mesa_apply_stencil_transfer_ops(const GLcontext
*ctx
, GLuint n
,
1960 GLstencil stencil
[])
1962 if (ctx
->Pixel
.IndexShift
!= 0 || ctx
->Pixel
.IndexOffset
!= 0) {
1963 const GLint offset
= ctx
->Pixel
.IndexOffset
;
1964 GLint shift
= ctx
->Pixel
.IndexShift
;
1967 for (i
= 0; i
< n
; i
++) {
1968 stencil
[i
] = (stencil
[i
] << shift
) + offset
;
1971 else if (shift
< 0) {
1973 for (i
= 0; i
< n
; i
++) {
1974 stencil
[i
] = (stencil
[i
] >> shift
) + offset
;
1978 for (i
= 0; i
< n
; i
++) {
1979 stencil
[i
] = stencil
[i
] + offset
;
1983 if (ctx
->Pixel
.MapStencilFlag
) {
1984 GLuint mask
= ctx
->PixelMaps
.StoS
.Size
- 1;
1986 for (i
= 0; i
< n
; i
++) {
1987 stencil
[i
] = (GLstencil
)ctx
->PixelMaps
.StoS
.Map
[ stencil
[i
] & mask
];
1994 * Used to pack an array [][4] of RGBA float colors as specified
1995 * by the dstFormat, dstType and dstPacking. Used by glReadPixels,
1996 * glGetConvolutionFilter(), etc.
1997 * Note: the rgba values will be modified by this function when any pixel
1998 * transfer ops are enabled.
2001 _mesa_pack_rgba_span_float(GLcontext
*ctx
, GLuint n
, GLfloat rgba
[][4],
2002 GLenum dstFormat
, GLenum dstType
,
2004 const struct gl_pixelstore_attrib
*dstPacking
,
2005 GLbitfield transferOps
)
2007 GLfloat luminance
[MAX_WIDTH
];
2008 const GLint comps
= _mesa_components_in_format(dstFormat
);
2012 * This test should probably go away. Have the caller set/clear the
2013 * IMAGE_CLAMP_BIT as needed.
2015 if (dstType
!= GL_FLOAT
|| ctx
->Color
.ClampReadColor
== GL_TRUE
) {
2016 /* need to clamp to [0, 1] */
2017 transferOps
|= IMAGE_CLAMP_BIT
;
2021 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, n
, rgba
);
2022 if ((transferOps
& IMAGE_MIN_MAX_BIT
) && ctx
->MinMax
.Sink
) {
2027 if (dstFormat
== GL_LUMINANCE
|| dstFormat
== GL_LUMINANCE_ALPHA
) {
2028 /* compute luminance values */
2029 if (transferOps
& IMAGE_CLAMP_BIT
) {
2030 for (i
= 0; i
< n
; i
++) {
2031 GLfloat sum
= rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
2032 luminance
[i
] = CLAMP(sum
, 0.0F
, 1.0F
);
2036 for (i
= 0; i
< n
; i
++) {
2037 luminance
[i
] = rgba
[i
][RCOMP
] + rgba
[i
][GCOMP
] + rgba
[i
][BCOMP
];
2043 * Pack/store the pixels. Ugh! Lots of cases!!!
2046 case GL_UNSIGNED_BYTE
:
2048 GLubyte
*dst
= (GLubyte
*) dstAddr
;
2049 switch (dstFormat
) {
2052 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2056 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2060 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2064 dst
[i
] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2068 dst
[i
] = FLOAT_TO_UBYTE(luminance
[i
]);
2070 case GL_LUMINANCE_ALPHA
:
2072 dst
[i
*2+0] = FLOAT_TO_UBYTE(luminance
[i
]);
2073 dst
[i
*2+1] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2078 dst
[i
*3+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2079 dst
[i
*3+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2080 dst
[i
*3+2] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2085 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2086 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2087 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2088 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2093 dst
[i
*3+0] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2094 dst
[i
*3+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2095 dst
[i
*3+2] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2100 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2101 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2102 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2103 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2108 dst
[i
*4+0] = FLOAT_TO_UBYTE(rgba
[i
][ACOMP
]);
2109 dst
[i
*4+1] = FLOAT_TO_UBYTE(rgba
[i
][BCOMP
]);
2110 dst
[i
*4+2] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2111 dst
[i
*4+3] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2117 dst
[i
*2+0] = FLOAT_TO_UBYTE(rgba
[i
][RCOMP
]);
2118 dst
[i
*2+1] = FLOAT_TO_UBYTE(rgba
[i
][GCOMP
]);
2122 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2128 GLbyte
*dst
= (GLbyte
*) dstAddr
;
2129 switch (dstFormat
) {
2132 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2136 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2140 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2144 dst
[i
] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2148 dst
[i
] = FLOAT_TO_BYTE(luminance
[i
]);
2150 case GL_LUMINANCE_ALPHA
:
2152 dst
[i
*2+0] = FLOAT_TO_BYTE(luminance
[i
]);
2153 dst
[i
*2+1] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2158 dst
[i
*3+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2159 dst
[i
*3+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2160 dst
[i
*3+2] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2165 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2166 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2167 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2168 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2173 dst
[i
*3+0] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2174 dst
[i
*3+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2175 dst
[i
*3+2] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2180 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2181 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2182 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2183 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2188 dst
[i
*4+0] = FLOAT_TO_BYTE(rgba
[i
][ACOMP
]);
2189 dst
[i
*4+1] = FLOAT_TO_BYTE(rgba
[i
][BCOMP
]);
2190 dst
[i
*4+2] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2191 dst
[i
*4+3] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2197 dst
[i
*2+0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
2198 dst
[i
*2+1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
2202 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2206 case GL_UNSIGNED_SHORT
:
2208 GLushort
*dst
= (GLushort
*) dstAddr
;
2209 switch (dstFormat
) {
2212 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][RCOMP
]);
2216 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][GCOMP
]);
2220 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][BCOMP
]);
2224 CLAMPED_FLOAT_TO_USHORT(dst
[i
], rgba
[i
][ACOMP
]);
2228 UNCLAMPED_FLOAT_TO_USHORT(dst
[i
], luminance
[i
]);
2230 case GL_LUMINANCE_ALPHA
:
2232 UNCLAMPED_FLOAT_TO_USHORT(dst
[i
*2+0], luminance
[i
]);
2233 CLAMPED_FLOAT_TO_USHORT(dst
[i
*2+1], rgba
[i
][ACOMP
]);
2238 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+0], rgba
[i
][RCOMP
]);
2239 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+1], rgba
[i
][GCOMP
]);
2240 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+2], rgba
[i
][BCOMP
]);
2245 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+0], rgba
[i
][RCOMP
]);
2246 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+1], rgba
[i
][GCOMP
]);
2247 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+2], rgba
[i
][BCOMP
]);
2248 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+3], rgba
[i
][ACOMP
]);
2253 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+0], rgba
[i
][BCOMP
]);
2254 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+1], rgba
[i
][GCOMP
]);
2255 CLAMPED_FLOAT_TO_USHORT(dst
[i
*3+2], rgba
[i
][RCOMP
]);
2260 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+0], rgba
[i
][BCOMP
]);
2261 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+1], rgba
[i
][GCOMP
]);
2262 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+2], rgba
[i
][RCOMP
]);
2263 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+3], rgba
[i
][ACOMP
]);
2268 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+0], rgba
[i
][ACOMP
]);
2269 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+1], rgba
[i
][BCOMP
]);
2270 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+2], rgba
[i
][GCOMP
]);
2271 CLAMPED_FLOAT_TO_USHORT(dst
[i
*4+3], rgba
[i
][RCOMP
]);
2277 dst
[i
*2+0] = FLOAT_TO_USHORT(rgba
[i
][RCOMP
]);
2278 dst
[i
*2+1] = FLOAT_TO_USHORT(rgba
[i
][GCOMP
]);
2282 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2288 GLshort
*dst
= (GLshort
*) dstAddr
;
2289 switch (dstFormat
) {
2292 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2296 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2300 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2304 dst
[i
] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2308 dst
[i
] = FLOAT_TO_SHORT(luminance
[i
]);
2310 case GL_LUMINANCE_ALPHA
:
2312 dst
[i
*2+0] = FLOAT_TO_SHORT(luminance
[i
]);
2313 dst
[i
*2+1] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2318 dst
[i
*3+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2319 dst
[i
*3+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2320 dst
[i
*3+2] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2325 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2326 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2327 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2328 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2333 dst
[i
*3+0] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2334 dst
[i
*3+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2335 dst
[i
*3+2] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2340 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2341 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2342 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2343 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2348 dst
[i
*4+0] = FLOAT_TO_SHORT(rgba
[i
][ACOMP
]);
2349 dst
[i
*4+1] = FLOAT_TO_SHORT(rgba
[i
][BCOMP
]);
2350 dst
[i
*4+2] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2351 dst
[i
*4+3] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2357 dst
[i
*2+0] = FLOAT_TO_SHORT(rgba
[i
][RCOMP
]);
2358 dst
[i
*2+1] = FLOAT_TO_SHORT(rgba
[i
][GCOMP
]);
2362 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2366 case GL_UNSIGNED_INT
:
2368 GLuint
*dst
= (GLuint
*) dstAddr
;
2369 switch (dstFormat
) {
2372 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2376 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2380 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2384 dst
[i
] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2388 dst
[i
] = FLOAT_TO_UINT(luminance
[i
]);
2390 case GL_LUMINANCE_ALPHA
:
2392 dst
[i
*2+0] = FLOAT_TO_UINT(luminance
[i
]);
2393 dst
[i
*2+1] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2398 dst
[i
*3+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2399 dst
[i
*3+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2400 dst
[i
*3+2] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2405 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2406 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2407 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2408 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2413 dst
[i
*3+0] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2414 dst
[i
*3+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2415 dst
[i
*3+2] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2420 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2421 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2422 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2423 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2428 dst
[i
*4+0] = FLOAT_TO_UINT(rgba
[i
][ACOMP
]);
2429 dst
[i
*4+1] = FLOAT_TO_UINT(rgba
[i
][BCOMP
]);
2430 dst
[i
*4+2] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2431 dst
[i
*4+3] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2437 dst
[i
*2+0] = FLOAT_TO_UINT(rgba
[i
][RCOMP
]);
2438 dst
[i
*2+1] = FLOAT_TO_UINT(rgba
[i
][GCOMP
]);
2442 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2448 GLint
*dst
= (GLint
*) dstAddr
;
2449 switch (dstFormat
) {
2452 dst
[i
] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2456 dst
[i
] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2460 dst
[i
] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2464 dst
[i
] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2468 dst
[i
] = FLOAT_TO_INT(luminance
[i
]);
2470 case GL_LUMINANCE_ALPHA
:
2472 dst
[i
*2+0] = FLOAT_TO_INT(luminance
[i
]);
2473 dst
[i
*2+1] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2478 dst
[i
*3+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2479 dst
[i
*3+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2480 dst
[i
*3+2] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2485 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2486 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2487 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2488 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2493 dst
[i
*3+0] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2494 dst
[i
*3+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2495 dst
[i
*3+2] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2500 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2501 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2502 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2503 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2508 dst
[i
*4+0] = FLOAT_TO_INT(rgba
[i
][ACOMP
]);
2509 dst
[i
*4+1] = FLOAT_TO_INT(rgba
[i
][BCOMP
]);
2510 dst
[i
*4+2] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2511 dst
[i
*4+3] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2517 dst
[i
*2+0] = FLOAT_TO_INT(rgba
[i
][RCOMP
]);
2518 dst
[i
*2+1] = FLOAT_TO_INT(rgba
[i
][GCOMP
]);
2522 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2528 GLfloat
*dst
= (GLfloat
*) dstAddr
;
2529 switch (dstFormat
) {
2532 dst
[i
] = rgba
[i
][RCOMP
];
2536 dst
[i
] = rgba
[i
][GCOMP
];
2540 dst
[i
] = rgba
[i
][BCOMP
];
2544 dst
[i
] = rgba
[i
][ACOMP
];
2548 dst
[i
] = luminance
[i
];
2550 case GL_LUMINANCE_ALPHA
:
2552 dst
[i
*2+0] = luminance
[i
];
2553 dst
[i
*2+1] = rgba
[i
][ACOMP
];
2558 dst
[i
*3+0] = rgba
[i
][RCOMP
];
2559 dst
[i
*3+1] = rgba
[i
][GCOMP
];
2560 dst
[i
*3+2] = rgba
[i
][BCOMP
];
2565 dst
[i
*4+0] = rgba
[i
][RCOMP
];
2566 dst
[i
*4+1] = rgba
[i
][GCOMP
];
2567 dst
[i
*4+2] = rgba
[i
][BCOMP
];
2568 dst
[i
*4+3] = rgba
[i
][ACOMP
];
2573 dst
[i
*3+0] = rgba
[i
][BCOMP
];
2574 dst
[i
*3+1] = rgba
[i
][GCOMP
];
2575 dst
[i
*3+2] = rgba
[i
][RCOMP
];
2580 dst
[i
*4+0] = rgba
[i
][BCOMP
];
2581 dst
[i
*4+1] = rgba
[i
][GCOMP
];
2582 dst
[i
*4+2] = rgba
[i
][RCOMP
];
2583 dst
[i
*4+3] = rgba
[i
][ACOMP
];
2588 dst
[i
*4+0] = rgba
[i
][ACOMP
];
2589 dst
[i
*4+1] = rgba
[i
][BCOMP
];
2590 dst
[i
*4+2] = rgba
[i
][GCOMP
];
2591 dst
[i
*4+3] = rgba
[i
][RCOMP
];
2597 dst
[i
*2+0] = rgba
[i
][RCOMP
];
2598 dst
[i
*2+1] = rgba
[i
][GCOMP
];
2602 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2606 case GL_HALF_FLOAT_ARB
:
2608 GLhalfARB
*dst
= (GLhalfARB
*) dstAddr
;
2609 switch (dstFormat
) {
2612 dst
[i
] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2616 dst
[i
] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2620 dst
[i
] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2624 dst
[i
] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2628 dst
[i
] = _mesa_float_to_half(luminance
[i
]);
2630 case GL_LUMINANCE_ALPHA
:
2632 dst
[i
*2+0] = _mesa_float_to_half(luminance
[i
]);
2633 dst
[i
*2+1] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2638 dst
[i
*3+0] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2639 dst
[i
*3+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2640 dst
[i
*3+2] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2645 dst
[i
*4+0] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2646 dst
[i
*4+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2647 dst
[i
*4+2] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2648 dst
[i
*4+3] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2653 dst
[i
*3+0] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2654 dst
[i
*3+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2655 dst
[i
*3+2] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2660 dst
[i
*4+0] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2661 dst
[i
*4+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2662 dst
[i
*4+2] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2663 dst
[i
*4+3] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2668 dst
[i
*4+0] = _mesa_float_to_half(rgba
[i
][ACOMP
]);
2669 dst
[i
*4+1] = _mesa_float_to_half(rgba
[i
][BCOMP
]);
2670 dst
[i
*4+2] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2671 dst
[i
*4+3] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2677 dst
[i
*2+0] = _mesa_float_to_half(rgba
[i
][RCOMP
]);
2678 dst
[i
*2+1] = _mesa_float_to_half(rgba
[i
][GCOMP
]);
2682 _mesa_problem(ctx
, "bad format in _mesa_pack_rgba_span\n");
2686 case GL_UNSIGNED_BYTE_3_3_2
:
2687 if (dstFormat
== GL_RGB
) {
2688 GLubyte
*dst
= (GLubyte
*) dstAddr
;
2690 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 7.0F
) << 5)
2691 | (IROUND(rgba
[i
][GCOMP
] * 7.0F
) << 2)
2692 | (IROUND(rgba
[i
][BCOMP
] * 3.0F
) );
2696 case GL_UNSIGNED_BYTE_2_3_3_REV
:
2697 if (dstFormat
== GL_RGB
) {
2698 GLubyte
*dst
= (GLubyte
*) dstAddr
;
2700 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 7.0F
) )
2701 | (IROUND(rgba
[i
][GCOMP
] * 7.0F
) << 3)
2702 | (IROUND(rgba
[i
][BCOMP
] * 3.0F
) << 6);
2706 case GL_UNSIGNED_SHORT_5_6_5
:
2707 if (dstFormat
== GL_RGB
) {
2708 GLushort
*dst
= (GLushort
*) dstAddr
;
2710 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 11)
2711 | (IROUND(rgba
[i
][GCOMP
] * 63.0F
) << 5)
2712 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) );
2716 case GL_UNSIGNED_SHORT_5_6_5_REV
:
2717 if (dstFormat
== GL_RGB
) {
2718 GLushort
*dst
= (GLushort
*) dstAddr
;
2720 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) )
2721 | (IROUND(rgba
[i
][GCOMP
] * 63.0F
) << 5)
2722 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 11);
2726 case GL_UNSIGNED_SHORT_4_4_4_4
:
2727 if (dstFormat
== GL_RGBA
) {
2728 GLushort
*dst
= (GLushort
*) dstAddr
;
2730 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 12)
2731 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 8)
2732 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 4)
2733 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) );
2736 else if (dstFormat
== GL_BGRA
) {
2737 GLushort
*dst
= (GLushort
*) dstAddr
;
2739 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 12)
2740 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 8)
2741 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 4)
2742 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) );
2745 else if (dstFormat
== GL_ABGR_EXT
) {
2746 GLushort
*dst
= (GLushort
*) dstAddr
;
2748 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 15.0F
) << 12)
2749 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 8)
2750 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 4)
2751 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) );
2755 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
2756 if (dstFormat
== GL_RGBA
) {
2757 GLushort
*dst
= (GLushort
*) dstAddr
;
2759 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 15.0F
) )
2760 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 4)
2761 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 8)
2762 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) << 12);
2765 else if (dstFormat
== GL_BGRA
) {
2766 GLushort
*dst
= (GLushort
*) dstAddr
;
2768 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 15.0F
) )
2769 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 4)
2770 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 8)
2771 | (IROUND(rgba
[i
][ACOMP
] * 15.0F
) << 12);
2774 else if (dstFormat
== GL_ABGR_EXT
) {
2775 GLushort
*dst
= (GLushort
*) dstAddr
;
2777 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 15.0F
) )
2778 | (IROUND(rgba
[i
][BCOMP
] * 15.0F
) << 4)
2779 | (IROUND(rgba
[i
][GCOMP
] * 15.0F
) << 8)
2780 | (IROUND(rgba
[i
][RCOMP
] * 15.0F
) << 12);
2784 case GL_UNSIGNED_SHORT_5_5_5_1
:
2785 if (dstFormat
== GL_RGBA
) {
2786 GLushort
*dst
= (GLushort
*) dstAddr
;
2788 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 11)
2789 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 6)
2790 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 1)
2791 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) );
2794 else if (dstFormat
== GL_BGRA
) {
2795 GLushort
*dst
= (GLushort
*) dstAddr
;
2797 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 11)
2798 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 6)
2799 | (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 1)
2800 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) );
2803 else if (dstFormat
== GL_ABGR_EXT
) {
2804 GLushort
*dst
= (GLushort
*) dstAddr
;
2806 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 31.0F
) << 11)
2807 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 6)
2808 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 1)
2809 | (IROUND(rgba
[i
][RCOMP
] * 1.0F
) );
2813 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
2814 if (dstFormat
== GL_RGBA
) {
2815 GLushort
*dst
= (GLushort
*) dstAddr
;
2817 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 31.0F
) )
2818 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 5)
2819 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 10)
2820 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) << 15);
2823 else if (dstFormat
== GL_BGRA
) {
2824 GLushort
*dst
= (GLushort
*) dstAddr
;
2826 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 31.0F
) )
2827 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 5)
2828 | (IROUND(rgba
[i
][RCOMP
] * 31.0F
) << 10)
2829 | (IROUND(rgba
[i
][ACOMP
] * 1.0F
) << 15);
2832 else if (dstFormat
== GL_ABGR_EXT
) {
2833 GLushort
*dst
= (GLushort
*) dstAddr
;
2835 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 31.0F
) )
2836 | (IROUND(rgba
[i
][BCOMP
] * 31.0F
) << 5)
2837 | (IROUND(rgba
[i
][GCOMP
] * 31.0F
) << 10)
2838 | (IROUND(rgba
[i
][RCOMP
] * 1.0F
) << 15);
2842 case GL_UNSIGNED_INT_8_8_8_8
:
2843 if (dstFormat
== GL_RGBA
) {
2844 GLuint
*dst
= (GLuint
*) dstAddr
;
2846 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 255.F
) << 24)
2847 | (IROUND(rgba
[i
][GCOMP
] * 255.F
) << 16)
2848 | (IROUND(rgba
[i
][BCOMP
] * 255.F
) << 8)
2849 | (IROUND(rgba
[i
][ACOMP
] * 255.F
) );
2852 else if (dstFormat
== GL_BGRA
) {
2853 GLuint
*dst
= (GLuint
*) dstAddr
;
2855 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 255.F
) << 24)
2856 | (IROUND(rgba
[i
][GCOMP
] * 255.F
) << 16)
2857 | (IROUND(rgba
[i
][RCOMP
] * 255.F
) << 8)
2858 | (IROUND(rgba
[i
][ACOMP
] * 255.F
) );
2861 else if (dstFormat
== GL_ABGR_EXT
) {
2862 GLuint
*dst
= (GLuint
*) dstAddr
;
2864 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 255.F
) << 24)
2865 | (IROUND(rgba
[i
][BCOMP
] * 255.F
) << 16)
2866 | (IROUND(rgba
[i
][GCOMP
] * 255.F
) << 8)
2867 | (IROUND(rgba
[i
][RCOMP
] * 255.F
) );
2871 case GL_UNSIGNED_INT_8_8_8_8_REV
:
2872 if (dstFormat
== GL_RGBA
) {
2873 GLuint
*dst
= (GLuint
*) dstAddr
;
2875 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 255.0F
) )
2876 | (IROUND(rgba
[i
][GCOMP
] * 255.0F
) << 8)
2877 | (IROUND(rgba
[i
][BCOMP
] * 255.0F
) << 16)
2878 | (IROUND(rgba
[i
][ACOMP
] * 255.0F
) << 24);
2881 else if (dstFormat
== GL_BGRA
) {
2882 GLuint
*dst
= (GLuint
*) dstAddr
;
2884 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 255.0F
) )
2885 | (IROUND(rgba
[i
][GCOMP
] * 255.0F
) << 8)
2886 | (IROUND(rgba
[i
][RCOMP
] * 255.0F
) << 16)
2887 | (IROUND(rgba
[i
][ACOMP
] * 255.0F
) << 24);
2890 else if (dstFormat
== GL_ABGR_EXT
) {
2891 GLuint
*dst
= (GLuint
*) dstAddr
;
2893 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 255.0F
) )
2894 | (IROUND(rgba
[i
][BCOMP
] * 255.0F
) << 8)
2895 | (IROUND(rgba
[i
][GCOMP
] * 255.0F
) << 16)
2896 | (IROUND(rgba
[i
][RCOMP
] * 255.0F
) << 24);
2900 case GL_UNSIGNED_INT_10_10_10_2
:
2901 if (dstFormat
== GL_RGBA
) {
2902 GLuint
*dst
= (GLuint
*) dstAddr
;
2904 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) << 22)
2905 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 12)
2906 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 2)
2907 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) );
2910 else if (dstFormat
== GL_BGRA
) {
2911 GLuint
*dst
= (GLuint
*) dstAddr
;
2913 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 22)
2914 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 12)
2915 | (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) << 2)
2916 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) );
2919 else if (dstFormat
== GL_ABGR_EXT
) {
2920 GLuint
*dst
= (GLuint
*) dstAddr
;
2922 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 1023.0F
) << 22)
2923 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 12)
2924 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 2)
2925 | (IROUND(rgba
[i
][RCOMP
] * 3.0F
) );
2929 case GL_UNSIGNED_INT_2_10_10_10_REV
:
2930 if (dstFormat
== GL_RGBA
) {
2931 GLuint
*dst
= (GLuint
*) dstAddr
;
2933 dst
[i
] = (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) )
2934 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 10)
2935 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 20)
2936 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) << 30);
2939 else if (dstFormat
== GL_BGRA
) {
2940 GLuint
*dst
= (GLuint
*) dstAddr
;
2942 dst
[i
] = (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) )
2943 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 10)
2944 | (IROUND(rgba
[i
][RCOMP
] * 1023.0F
) << 20)
2945 | (IROUND(rgba
[i
][ACOMP
] * 3.0F
) << 30);
2948 else if (dstFormat
== GL_ABGR_EXT
) {
2949 GLuint
*dst
= (GLuint
*) dstAddr
;
2951 dst
[i
] = (IROUND(rgba
[i
][ACOMP
] * 1023.0F
) )
2952 | (IROUND(rgba
[i
][BCOMP
] * 1023.0F
) << 10)
2953 | (IROUND(rgba
[i
][GCOMP
] * 1023.0F
) << 20)
2954 | (IROUND(rgba
[i
][RCOMP
] * 3.0F
) << 30);
2959 _mesa_problem(ctx
, "bad type in _mesa_pack_rgba_span_float");
2963 if (dstPacking
->SwapBytes
) {
2964 GLint swapSize
= _mesa_sizeof_packed_type(dstType
);
2965 if (swapSize
== 2) {
2966 if (dstPacking
->SwapBytes
) {
2967 _mesa_swap2((GLushort
*) dstAddr
, n
* comps
);
2970 else if (swapSize
== 4) {
2971 if (dstPacking
->SwapBytes
) {
2972 _mesa_swap4((GLuint
*) dstAddr
, n
* comps
);
2979 #define SWAP2BYTE(VALUE) \
2981 GLubyte *bytes = (GLubyte *) &(VALUE); \
2982 GLubyte tmp = bytes[0]; \
2983 bytes[0] = bytes[1]; \
2987 #define SWAP4BYTE(VALUE) \
2989 GLubyte *bytes = (GLubyte *) &(VALUE); \
2990 GLubyte tmp = bytes[0]; \
2991 bytes[0] = bytes[3]; \
2994 bytes[1] = bytes[2]; \
3000 extract_uint_indexes(GLuint n
, GLuint indexes
[],
3001 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
3002 const struct gl_pixelstore_attrib
*unpack
)
3004 ASSERT(srcFormat
== GL_COLOR_INDEX
|| srcFormat
== GL_STENCIL_INDEX
);
3006 ASSERT(srcType
== GL_BITMAP
||
3007 srcType
== GL_UNSIGNED_BYTE
||
3008 srcType
== GL_BYTE
||
3009 srcType
== GL_UNSIGNED_SHORT
||
3010 srcType
== GL_SHORT
||
3011 srcType
== GL_UNSIGNED_INT
||
3012 srcType
== GL_INT
||
3013 srcType
== GL_UNSIGNED_INT_24_8_EXT
||
3014 srcType
== GL_HALF_FLOAT_ARB
||
3015 srcType
== GL_FLOAT
);
3020 GLubyte
*ubsrc
= (GLubyte
*) src
;
3021 if (unpack
->LsbFirst
) {
3022 GLubyte mask
= 1 << (unpack
->SkipPixels
& 0x7);
3024 for (i
= 0; i
< n
; i
++) {
3025 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
3036 GLubyte mask
= 128 >> (unpack
->SkipPixels
& 0x7);
3038 for (i
= 0; i
< n
; i
++) {
3039 indexes
[i
] = (*ubsrc
& mask
) ? 1 : 0;
3051 case GL_UNSIGNED_BYTE
:
3054 const GLubyte
*s
= (const GLubyte
*) src
;
3055 for (i
= 0; i
< n
; i
++)
3062 const GLbyte
*s
= (const GLbyte
*) src
;
3063 for (i
= 0; i
< n
; i
++)
3067 case GL_UNSIGNED_SHORT
:
3070 const GLushort
*s
= (const GLushort
*) src
;
3071 if (unpack
->SwapBytes
) {
3072 for (i
= 0; i
< n
; i
++) {
3073 GLushort value
= s
[i
];
3079 for (i
= 0; i
< n
; i
++)
3087 const GLshort
*s
= (const GLshort
*) src
;
3088 if (unpack
->SwapBytes
) {
3089 for (i
= 0; i
< n
; i
++) {
3090 GLshort value
= s
[i
];
3096 for (i
= 0; i
< n
; i
++)
3101 case GL_UNSIGNED_INT
:
3104 const GLuint
*s
= (const GLuint
*) src
;
3105 if (unpack
->SwapBytes
) {
3106 for (i
= 0; i
< n
; i
++) {
3107 GLuint value
= s
[i
];
3113 for (i
= 0; i
< n
; i
++)
3121 const GLint
*s
= (const GLint
*) src
;
3122 if (unpack
->SwapBytes
) {
3123 for (i
= 0; i
< n
; i
++) {
3130 for (i
= 0; i
< n
; i
++)
3138 const GLfloat
*s
= (const GLfloat
*) src
;
3139 if (unpack
->SwapBytes
) {
3140 for (i
= 0; i
< n
; i
++) {
3141 GLfloat value
= s
[i
];
3143 indexes
[i
] = (GLuint
) value
;
3147 for (i
= 0; i
< n
; i
++)
3148 indexes
[i
] = (GLuint
) s
[i
];
3152 case GL_HALF_FLOAT_ARB
:
3155 const GLhalfARB
*s
= (const GLhalfARB
*) src
;
3156 if (unpack
->SwapBytes
) {
3157 for (i
= 0; i
< n
; i
++) {
3158 GLhalfARB value
= s
[i
];
3160 indexes
[i
] = (GLuint
) _mesa_half_to_float(value
);
3164 for (i
= 0; i
< n
; i
++)
3165 indexes
[i
] = (GLuint
) _mesa_half_to_float(s
[i
]);
3169 case GL_UNSIGNED_INT_24_8_EXT
:
3172 const GLuint
*s
= (const GLuint
*) src
;
3173 if (unpack
->SwapBytes
) {
3174 for (i
= 0; i
< n
; i
++) {
3175 GLuint value
= s
[i
];
3177 indexes
[i
] = value
& 0xff; /* lower 8 bits */
3181 for (i
= 0; i
< n
; i
++)
3182 indexes
[i
] = s
[i
] & 0xff; /* lower 8 bits */
3188 _mesa_problem(NULL
, "bad srcType in extract_uint_indexes");
3195 * This function extracts floating point RGBA values from arbitrary
3196 * image data. srcFormat and srcType are the format and type parameters
3197 * passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
3199 * Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
3200 * implements the "Conversion to floating point", "Conversion to RGB",
3201 * and "Final Expansion to RGBA" operations.
3203 * Args: n - number of pixels
3204 * rgba - output colors
3205 * srcFormat - format of incoming data
3206 * srcType - data type of incoming data
3207 * src - source data pointer
3208 * swapBytes - perform byteswapping of incoming data?
3211 extract_float_rgba(GLuint n
, GLfloat rgba
[][4],
3212 GLenum srcFormat
, GLenum srcType
, const GLvoid
*src
,
3213 GLboolean swapBytes
)
3215 GLint redIndex
, greenIndex
, blueIndex
, alphaIndex
;
3217 GLint rComp
, bComp
, gComp
, aComp
;
3219 ASSERT(srcFormat
== GL_RED
||
3220 srcFormat
== GL_GREEN
||
3221 srcFormat
== GL_BLUE
||
3222 srcFormat
== GL_ALPHA
||
3223 srcFormat
== GL_LUMINANCE
||
3224 srcFormat
== GL_LUMINANCE_ALPHA
||
3225 srcFormat
== GL_INTENSITY
||
3226 srcFormat
== GL_RGB
||
3227 srcFormat
== GL_BGR
||
3228 srcFormat
== GL_RGBA
||
3229 srcFormat
== GL_BGRA
||
3230 srcFormat
== GL_ABGR_EXT
||
3231 srcFormat
== GL_DU8DV8_ATI
||
3232 srcFormat
== GL_DUDV_ATI
);
3234 ASSERT(srcType
== GL_UNSIGNED_BYTE
||
3235 srcType
== GL_BYTE
||
3236 srcType
== GL_UNSIGNED_SHORT
||
3237 srcType
== GL_SHORT
||
3238 srcType
== GL_UNSIGNED_INT
||
3239 srcType
== GL_INT
||
3240 srcType
== GL_HALF_FLOAT_ARB
||
3241 srcType
== GL_FLOAT
||
3242 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
3243 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
3244 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
3245 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
3246 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
3247 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
3248 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
3249 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
3250 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
3251 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
3252 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
3253 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
3255 rComp
= gComp
= bComp
= aComp
= -1;
3257 switch (srcFormat
) {
3260 greenIndex
= blueIndex
= alphaIndex
= -1;
3265 redIndex
= blueIndex
= alphaIndex
= -1;
3270 redIndex
= greenIndex
= alphaIndex
= -1;
3274 redIndex
= greenIndex
= blueIndex
= -1;
3279 redIndex
= greenIndex
= blueIndex
= 0;
3283 case GL_LUMINANCE_ALPHA
:
3284 redIndex
= greenIndex
= blueIndex
= 0;
3289 redIndex
= greenIndex
= blueIndex
= alphaIndex
= 0;
3356 _mesa_problem(NULL
, "bad srcFormat %s in extract float data",
3357 _mesa_lookup_enum_by_nr(srcFormat
));
3362 #define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION) \
3363 if ((INDEX) < 0) { \
3365 for (i = 0; i < n; i++) { \
3366 rgba[i][CHANNEL] = DEFAULT; \
3369 else if (swapBytes) { \
3370 const TYPE *s = (const TYPE *) src; \
3372 for (i = 0; i < n; i++) { \
3373 TYPE value = s[INDEX]; \
3374 if (sizeof(TYPE) == 2) { \
3377 else if (sizeof(TYPE) == 4) { \
3380 rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
3385 const TYPE *s = (const TYPE *) src; \
3387 for (i = 0; i < n; i++) { \
3388 rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
3394 case GL_UNSIGNED_BYTE
:
3395 PROCESS(redIndex
, RCOMP
, 0.0F
, GLubyte
, UBYTE_TO_FLOAT
);
3396 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLubyte
, UBYTE_TO_FLOAT
);
3397 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLubyte
, UBYTE_TO_FLOAT
);
3398 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLubyte
, UBYTE_TO_FLOAT
);
3401 PROCESS(redIndex
, RCOMP
, 0.0F
, GLbyte
, BYTE_TO_FLOAT
);
3402 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLbyte
, BYTE_TO_FLOAT
);
3403 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLbyte
, BYTE_TO_FLOAT
);
3404 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLbyte
, BYTE_TO_FLOAT
);
3406 case GL_UNSIGNED_SHORT
:
3407 PROCESS(redIndex
, RCOMP
, 0.0F
, GLushort
, USHORT_TO_FLOAT
);
3408 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLushort
, USHORT_TO_FLOAT
);
3409 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLushort
, USHORT_TO_FLOAT
);
3410 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLushort
, USHORT_TO_FLOAT
);
3413 PROCESS(redIndex
, RCOMP
, 0.0F
, GLshort
, SHORT_TO_FLOAT
);
3414 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLshort
, SHORT_TO_FLOAT
);
3415 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLshort
, SHORT_TO_FLOAT
);
3416 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLshort
, SHORT_TO_FLOAT
);
3418 case GL_UNSIGNED_INT
:
3419 PROCESS(redIndex
, RCOMP
, 0.0F
, GLuint
, UINT_TO_FLOAT
);
3420 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLuint
, UINT_TO_FLOAT
);
3421 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLuint
, UINT_TO_FLOAT
);
3422 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLuint
, UINT_TO_FLOAT
);
3425 PROCESS(redIndex
, RCOMP
, 0.0F
, GLint
, INT_TO_FLOAT
);
3426 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLint
, INT_TO_FLOAT
);
3427 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLint
, INT_TO_FLOAT
);
3428 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLint
, INT_TO_FLOAT
);
3431 PROCESS(redIndex
, RCOMP
, 0.0F
, GLfloat
, (GLfloat
));
3432 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLfloat
, (GLfloat
));
3433 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLfloat
, (GLfloat
));
3434 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLfloat
, (GLfloat
));
3436 case GL_HALF_FLOAT_ARB
:
3437 PROCESS(redIndex
, RCOMP
, 0.0F
, GLhalfARB
, _mesa_half_to_float
);
3438 PROCESS(greenIndex
, GCOMP
, 0.0F
, GLhalfARB
, _mesa_half_to_float
);
3439 PROCESS(blueIndex
, BCOMP
, 0.0F
, GLhalfARB
, _mesa_half_to_float
);
3440 PROCESS(alphaIndex
, ACOMP
, 1.0F
, GLhalfARB
, _mesa_half_to_float
);
3442 case GL_UNSIGNED_BYTE_3_3_2
:
3444 const GLubyte
*ubsrc
= (const GLubyte
*) src
;
3446 for (i
= 0; i
< n
; i
++) {
3447 GLubyte p
= ubsrc
[i
];
3448 rgba
[i
][rComp
] = ((p
>> 5) ) * (1.0F
/ 7.0F
);
3449 rgba
[i
][gComp
] = ((p
>> 2) & 0x7) * (1.0F
/ 7.0F
);
3450 rgba
[i
][bComp
] = ((p
) & 0x3) * (1.0F
/ 3.0F
);
3451 rgba
[i
][aComp
] = 1.0F
;
3455 case GL_UNSIGNED_BYTE_2_3_3_REV
:
3457 const GLubyte
*ubsrc
= (const GLubyte
*) src
;
3459 for (i
= 0; i
< n
; i
++) {
3460 GLubyte p
= ubsrc
[i
];
3461 rgba
[i
][rComp
] = ((p
) & 0x7) * (1.0F
/ 7.0F
);
3462 rgba
[i
][gComp
] = ((p
>> 3) & 0x7) * (1.0F
/ 7.0F
);
3463 rgba
[i
][bComp
] = ((p
>> 6) ) * (1.0F
/ 3.0F
);
3464 rgba
[i
][aComp
] = 1.0F
;
3468 case GL_UNSIGNED_SHORT_5_6_5
:
3470 const GLushort
*ussrc
= (const GLushort
*) src
;
3472 for (i
= 0; i
< n
; i
++) {
3473 GLushort p
= ussrc
[i
];
3475 rgba
[i
][rComp
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
3476 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
3477 rgba
[i
][bComp
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
3478 rgba
[i
][aComp
] = 1.0F
;
3482 const GLushort
*ussrc
= (const GLushort
*) src
;
3484 for (i
= 0; i
< n
; i
++) {
3485 GLushort p
= ussrc
[i
];
3486 rgba
[i
][rComp
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
3487 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
3488 rgba
[i
][bComp
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
3489 rgba
[i
][aComp
] = 1.0F
;
3493 case GL_UNSIGNED_SHORT_5_6_5_REV
:
3495 const GLushort
*ussrc
= (const GLushort
*) src
;
3497 for (i
= 0; i
< n
; i
++) {
3498 GLushort p
= ussrc
[i
];
3500 rgba
[i
][rComp
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
3501 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
3502 rgba
[i
][bComp
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
3503 rgba
[i
][aComp
] = 1.0F
;
3507 const GLushort
*ussrc
= (const GLushort
*) src
;
3509 for (i
= 0; i
< n
; i
++) {
3510 GLushort p
= ussrc
[i
];
3511 rgba
[i
][rComp
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
3512 rgba
[i
][gComp
] = ((p
>> 5) & 0x3f) * (1.0F
/ 63.0F
);
3513 rgba
[i
][bComp
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
3514 rgba
[i
][aComp
] = 1.0F
;
3518 case GL_UNSIGNED_SHORT_4_4_4_4
:
3520 const GLushort
*ussrc
= (const GLushort
*) src
;
3522 for (i
= 0; i
< n
; i
++) {
3523 GLushort p
= ussrc
[i
];
3525 rgba
[i
][rComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
3526 rgba
[i
][gComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
3527 rgba
[i
][bComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
3528 rgba
[i
][aComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
3532 const GLushort
*ussrc
= (const GLushort
*) src
;
3534 for (i
= 0; i
< n
; i
++) {
3535 GLushort p
= ussrc
[i
];
3536 rgba
[i
][rComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
3537 rgba
[i
][gComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
3538 rgba
[i
][bComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
3539 rgba
[i
][aComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
3543 case GL_UNSIGNED_SHORT_4_4_4_4_REV
:
3545 const GLushort
*ussrc
= (const GLushort
*) src
;
3547 for (i
= 0; i
< n
; i
++) {
3548 GLushort p
= ussrc
[i
];
3550 rgba
[i
][rComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
3551 rgba
[i
][gComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
3552 rgba
[i
][bComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
3553 rgba
[i
][aComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
3557 const GLushort
*ussrc
= (const GLushort
*) src
;
3559 for (i
= 0; i
< n
; i
++) {
3560 GLushort p
= ussrc
[i
];
3561 rgba
[i
][rComp
] = ((p
) & 0xf) * (1.0F
/ 15.0F
);
3562 rgba
[i
][gComp
] = ((p
>> 4) & 0xf) * (1.0F
/ 15.0F
);
3563 rgba
[i
][bComp
] = ((p
>> 8) & 0xf) * (1.0F
/ 15.0F
);
3564 rgba
[i
][aComp
] = ((p
>> 12) ) * (1.0F
/ 15.0F
);
3568 case GL_UNSIGNED_SHORT_5_5_5_1
:
3570 const GLushort
*ussrc
= (const GLushort
*) src
;
3572 for (i
= 0; i
< n
; i
++) {
3573 GLushort p
= ussrc
[i
];
3575 rgba
[i
][rComp
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
3576 rgba
[i
][gComp
] = ((p
>> 6) & 0x1f) * (1.0F
/ 31.0F
);
3577 rgba
[i
][bComp
] = ((p
>> 1) & 0x1f) * (1.0F
/ 31.0F
);
3578 rgba
[i
][aComp
] = ((p
) & 0x1) * (1.0F
/ 1.0F
);
3582 const GLushort
*ussrc
= (const GLushort
*) src
;
3584 for (i
= 0; i
< n
; i
++) {
3585 GLushort p
= ussrc
[i
];
3586 rgba
[i
][rComp
] = ((p
>> 11) ) * (1.0F
/ 31.0F
);
3587 rgba
[i
][gComp
] = ((p
>> 6) & 0x1f) * (1.0F
/ 31.0F
);
3588 rgba
[i
][bComp
] = ((p
>> 1) & 0x1f) * (1.0F
/ 31.0F
);
3589 rgba
[i
][aComp
] = ((p
) & 0x1) * (1.0F
/ 1.0F
);
3593 case GL_UNSIGNED_SHORT_1_5_5_5_REV
:
3595 const GLushort
*ussrc
= (const GLushort
*) src
;
3597 for (i
= 0; i
< n
; i
++) {
3598 GLushort p
= ussrc
[i
];
3600 rgba
[i
][rComp
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
3601 rgba
[i
][gComp
] = ((p
>> 5) & 0x1f) * (1.0F
/ 31.0F
);
3602 rgba
[i
][bComp
] = ((p
>> 10) & 0x1f) * (1.0F
/ 31.0F
);
3603 rgba
[i
][aComp
] = ((p
>> 15) ) * (1.0F
/ 1.0F
);
3607 const GLushort
*ussrc
= (const GLushort
*) src
;
3609 for (i
= 0; i
< n
; i
++) {
3610 GLushort p
= ussrc
[i
];
3611 rgba
[i
][rComp
] = ((p
) & 0x1f) * (1.0F
/ 31.0F
);
3612 rgba
[i
][gComp
] = ((p
>> 5) & 0x1f) * (1.0F
/ 31.0F
);
3613 rgba
[i
][bComp
] = ((p
>> 10) & 0x1f) * (1.0F
/ 31.0F
);
3614 rgba
[i
][aComp
] = ((p
>> 15) ) * (1.0F
/ 1.0F
);
3618 case GL_UNSIGNED_INT_8_8_8_8
:
3620 const GLuint
*uisrc
= (const GLuint
*) src
;
3622 for (i
= 0; i
< n
; i
++) {
3623 GLuint p
= uisrc
[i
];
3624 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3625 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3626 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3627 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3631 const GLuint
*uisrc
= (const GLuint
*) src
;
3633 for (i
= 0; i
< n
; i
++) {
3634 GLuint p
= uisrc
[i
];
3635 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3636 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3637 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3638 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3642 case GL_UNSIGNED_INT_8_8_8_8_REV
:
3644 const GLuint
*uisrc
= (const GLuint
*) src
;
3646 for (i
= 0; i
< n
; i
++) {
3647 GLuint p
= uisrc
[i
];
3648 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3649 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3650 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3651 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3655 const GLuint
*uisrc
= (const GLuint
*) src
;
3657 for (i
= 0; i
< n
; i
++) {
3658 GLuint p
= uisrc
[i
];
3659 rgba
[i
][rComp
] = UBYTE_TO_FLOAT((p
) & 0xff);
3660 rgba
[i
][gComp
] = UBYTE_TO_FLOAT((p
>> 8) & 0xff);
3661 rgba
[i
][bComp
] = UBYTE_TO_FLOAT((p
>> 16) & 0xff);
3662 rgba
[i
][aComp
] = UBYTE_TO_FLOAT((p
>> 24) );
3666 case GL_UNSIGNED_INT_10_10_10_2
:
3668 const GLuint
*uisrc
= (const GLuint
*) src
;
3670 for (i
= 0; i
< n
; i
++) {
3671 GLuint p
= uisrc
[i
];
3673 rgba
[i
][rComp
] = ((p
>> 22) ) * (1.0F
/ 1023.0F
);
3674 rgba
[i
][gComp
] = ((p
>> 12) & 0x3ff) * (1.0F
/ 1023.0F
);
3675 rgba
[i
][bComp
] = ((p
>> 2) & 0x3ff) * (1.0F
/ 1023.0F
);
3676 rgba
[i
][aComp
] = ((p
) & 0x3 ) * (1.0F
/ 3.0F
);
3680 const GLuint
*uisrc
= (const GLuint
*) src
;
3682 for (i
= 0; i
< n
; i
++) {
3683 GLuint p
= uisrc
[i
];
3684 rgba
[i
][rComp
] = ((p
>> 22) ) * (1.0F
/ 1023.0F
);
3685 rgba
[i
][gComp
] = ((p
>> 12) & 0x3ff) * (1.0F
/ 1023.0F
);
3686 rgba
[i
][bComp
] = ((p
>> 2) & 0x3ff) * (1.0F
/ 1023.0F
);
3687 rgba
[i
][aComp
] = ((p
) & 0x3 ) * (1.0F
/ 3.0F
);
3691 case GL_UNSIGNED_INT_2_10_10_10_REV
:
3693 const GLuint
*uisrc
= (const GLuint
*) src
;
3695 for (i
= 0; i
< n
; i
++) {
3696 GLuint p
= uisrc
[i
];
3698 rgba
[i
][rComp
] = ((p
) & 0x3ff) * (1.0F
/ 1023.0F
);
3699 rgba
[i
][gComp
] = ((p
>> 10) & 0x3ff) * (1.0F
/ 1023.0F
);
3700 rgba
[i
][bComp
] = ((p
>> 20) & 0x3ff) * (1.0F
/ 1023.0F
);
3701 rgba
[i
][aComp
] = ((p
>> 30) ) * (1.0F
/ 3.0F
);
3705 const GLuint
*uisrc
= (const GLuint
*) src
;
3707 for (i
= 0; i
< n
; i
++) {
3708 GLuint p
= uisrc
[i
];
3709 rgba
[i
][rComp
] = ((p
) & 0x3ff) * (1.0F
/ 1023.0F
);
3710 rgba
[i
][gComp
] = ((p
>> 10) & 0x3ff) * (1.0F
/ 1023.0F
);
3711 rgba
[i
][bComp
] = ((p
>> 20) & 0x3ff) * (1.0F
/ 1023.0F
);
3712 rgba
[i
][aComp
] = ((p
>> 30) ) * (1.0F
/ 3.0F
);
3717 _mesa_problem(NULL
, "bad srcType in extract float data");
3724 * Unpack a row of color image data from a client buffer according to
3725 * the pixel unpacking parameters.
3726 * Return GLchan values in the specified dest image format.
3727 * This is used by glDrawPixels and glTexImage?D().
3728 * \param ctx - the context
3729 * n - number of pixels in the span
3730 * dstFormat - format of destination color array
3731 * dest - the destination color array
3732 * srcFormat - source image format
3733 * srcType - source image data type
3734 * source - source image pointer
3735 * srcPacking - pixel unpacking parameters
3736 * transferOps - bitmask of IMAGE_*_BIT values of operations to apply
3738 * XXX perhaps expand this to process whole images someday.
3741 _mesa_unpack_color_span_chan( GLcontext
*ctx
,
3742 GLuint n
, GLenum dstFormat
, GLchan dest
[],
3743 GLenum srcFormat
, GLenum srcType
,
3744 const GLvoid
*source
,
3745 const struct gl_pixelstore_attrib
*srcPacking
,
3746 GLbitfield transferOps
)
3748 ASSERT(dstFormat
== GL_ALPHA
||
3749 dstFormat
== GL_LUMINANCE
||
3750 dstFormat
== GL_LUMINANCE_ALPHA
||
3751 dstFormat
== GL_INTENSITY
||
3752 dstFormat
== GL_RGB
||
3753 dstFormat
== GL_RGBA
||
3754 dstFormat
== GL_COLOR_INDEX
);
3756 ASSERT(srcFormat
== GL_RED
||
3757 srcFormat
== GL_GREEN
||
3758 srcFormat
== GL_BLUE
||
3759 srcFormat
== GL_ALPHA
||
3760 srcFormat
== GL_LUMINANCE
||
3761 srcFormat
== GL_LUMINANCE_ALPHA
||
3762 srcFormat
== GL_INTENSITY
||
3763 srcFormat
== GL_RGB
||
3764 srcFormat
== GL_BGR
||
3765 srcFormat
== GL_RGBA
||
3766 srcFormat
== GL_BGRA
||
3767 srcFormat
== GL_ABGR_EXT
||
3768 srcFormat
== GL_COLOR_INDEX
);
3770 ASSERT(srcType
== GL_BITMAP
||
3771 srcType
== GL_UNSIGNED_BYTE
||
3772 srcType
== GL_BYTE
||
3773 srcType
== GL_UNSIGNED_SHORT
||
3774 srcType
== GL_SHORT
||
3775 srcType
== GL_UNSIGNED_INT
||
3776 srcType
== GL_INT
||
3777 srcType
== GL_HALF_FLOAT_ARB
||
3778 srcType
== GL_FLOAT
||
3779 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
3780 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
3781 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
3782 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
3783 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
3784 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
3785 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
3786 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
3787 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
3788 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
3789 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
3790 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
3792 /* Try simple cases first */
3793 if (transferOps
== 0) {
3794 if (srcType
== CHAN_TYPE
) {
3795 if (dstFormat
== GL_RGBA
) {
3796 if (srcFormat
== GL_RGBA
) {
3797 memcpy( dest
, source
, n
* 4 * sizeof(GLchan
) );
3800 else if (srcFormat
== GL_RGB
) {
3802 const GLchan
*src
= (const GLchan
*) source
;
3804 for (i
= 0; i
< n
; i
++) {
3815 else if (dstFormat
== GL_RGB
) {
3816 if (srcFormat
== GL_RGB
) {
3817 memcpy( dest
, source
, n
* 3 * sizeof(GLchan
) );
3820 else if (srcFormat
== GL_RGBA
) {
3822 const GLchan
*src
= (const GLchan
*) source
;
3824 for (i
= 0; i
< n
; i
++) {
3834 else if (dstFormat
== srcFormat
) {
3835 GLint comps
= _mesa_components_in_format(srcFormat
);
3837 memcpy( dest
, source
, n
* comps
* sizeof(GLchan
) );
3842 * Common situation, loading 8bit RGBA/RGB source images
3843 * into 16/32 bit destination. (OSMesa16/32)
3845 else if (srcType
== GL_UNSIGNED_BYTE
) {
3846 if (dstFormat
== GL_RGBA
) {
3847 if (srcFormat
== GL_RGB
) {
3849 const GLubyte
*src
= (const GLubyte
*) source
;
3851 for (i
= 0; i
< n
; i
++) {
3852 dst
[0] = UBYTE_TO_CHAN(src
[0]);
3853 dst
[1] = UBYTE_TO_CHAN(src
[1]);
3854 dst
[2] = UBYTE_TO_CHAN(src
[2]);
3861 else if (srcFormat
== GL_RGBA
) {
3863 const GLubyte
*src
= (const GLubyte
*) source
;
3865 for (i
= 0; i
< n
; i
++) {
3866 dst
[0] = UBYTE_TO_CHAN(src
[0]);
3867 dst
[1] = UBYTE_TO_CHAN(src
[1]);
3868 dst
[2] = UBYTE_TO_CHAN(src
[2]);
3869 dst
[3] = UBYTE_TO_CHAN(src
[3]);
3876 else if (dstFormat
== GL_RGB
) {
3877 if (srcFormat
== GL_RGB
) {
3879 const GLubyte
*src
= (const GLubyte
*) source
;
3881 for (i
= 0; i
< n
; i
++) {
3882 dst
[0] = UBYTE_TO_CHAN(src
[0]);
3883 dst
[1] = UBYTE_TO_CHAN(src
[1]);
3884 dst
[2] = UBYTE_TO_CHAN(src
[2]);
3890 else if (srcFormat
== GL_RGBA
) {
3892 const GLubyte
*src
= (const GLubyte
*) source
;
3894 for (i
= 0; i
< n
; i
++) {
3895 dst
[0] = UBYTE_TO_CHAN(src
[0]);
3896 dst
[1] = UBYTE_TO_CHAN(src
[1]);
3897 dst
[2] = UBYTE_TO_CHAN(src
[2]);
3908 /* general solution begins here */
3910 GLint dstComponents
;
3911 GLint dstRedIndex
, dstGreenIndex
, dstBlueIndex
, dstAlphaIndex
;
3912 GLint dstLuminanceIndex
, dstIntensityIndex
;
3913 GLfloat rgba
[MAX_WIDTH
][4];
3915 dstComponents
= _mesa_components_in_format( dstFormat
);
3916 /* source & dest image formats should have been error checked by now */
3917 assert(dstComponents
> 0);
3920 * Extract image data and convert to RGBA floats
3922 assert(n
<= MAX_WIDTH
);
3923 if (srcFormat
== GL_COLOR_INDEX
) {
3924 GLuint indexes
[MAX_WIDTH
];
3925 extract_uint_indexes(n
, indexes
, srcFormat
, srcType
, source
,
3928 if (dstFormat
== GL_COLOR_INDEX
) {
3930 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
3931 /* convert to GLchan and return */
3932 for (i
= 0; i
< n
; i
++) {
3933 dest
[i
] = (GLchan
) (indexes
[i
] & 0xff);
3938 /* Convert indexes to RGBA */
3939 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
3940 shift_and_offset_ci(ctx
, n
, indexes
);
3942 _mesa_map_ci_to_rgba(ctx
, n
, indexes
, rgba
);
3945 /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
3946 * with color indexes.
3948 transferOps
&= ~(IMAGE_SCALE_BIAS_BIT
| IMAGE_MAP_COLOR_BIT
);
3951 /* non-color index data */
3952 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
3953 srcPacking
->SwapBytes
);
3956 /* Need to clamp if returning GLubytes or GLushorts */
3957 #if CHAN_TYPE != GL_FLOAT
3958 transferOps
|= IMAGE_CLAMP_BIT
;
3962 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, n
, rgba
);
3965 /* Now determine which color channels we need to produce.
3966 * And determine the dest index (offset) within each color tuple.
3968 switch (dstFormat
) {
3971 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
3972 dstLuminanceIndex
= dstIntensityIndex
= -1;
3975 dstLuminanceIndex
= 0;
3976 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
3977 dstIntensityIndex
= -1;
3979 case GL_LUMINANCE_ALPHA
:
3980 dstLuminanceIndex
= 0;
3982 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
3983 dstIntensityIndex
= -1;
3986 dstIntensityIndex
= 0;
3987 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
3988 dstLuminanceIndex
= -1;
3994 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
4001 dstLuminanceIndex
= dstIntensityIndex
= -1;
4004 _mesa_problem(ctx
, "bad dstFormat in _mesa_unpack_chan_span()");
4009 /* Now return the GLchan data in the requested dstFormat */
4011 if (dstRedIndex
>= 0) {
4014 for (i
= 0; i
< n
; i
++) {
4015 CLAMPED_FLOAT_TO_CHAN(dst
[dstRedIndex
], rgba
[i
][RCOMP
]);
4016 dst
+= dstComponents
;
4020 if (dstGreenIndex
>= 0) {
4023 for (i
= 0; i
< n
; i
++) {
4024 CLAMPED_FLOAT_TO_CHAN(dst
[dstGreenIndex
], rgba
[i
][GCOMP
]);
4025 dst
+= dstComponents
;
4029 if (dstBlueIndex
>= 0) {
4032 for (i
= 0; i
< n
; i
++) {
4033 CLAMPED_FLOAT_TO_CHAN(dst
[dstBlueIndex
], rgba
[i
][BCOMP
]);
4034 dst
+= dstComponents
;
4038 if (dstAlphaIndex
>= 0) {
4041 for (i
= 0; i
< n
; i
++) {
4042 CLAMPED_FLOAT_TO_CHAN(dst
[dstAlphaIndex
], rgba
[i
][ACOMP
]);
4043 dst
+= dstComponents
;
4047 if (dstIntensityIndex
>= 0) {
4050 assert(dstIntensityIndex
== 0);
4051 assert(dstComponents
== 1);
4052 for (i
= 0; i
< n
; i
++) {
4053 /* Intensity comes from red channel */
4054 CLAMPED_FLOAT_TO_CHAN(dst
[i
], rgba
[i
][RCOMP
]);
4058 if (dstLuminanceIndex
>= 0) {
4061 assert(dstLuminanceIndex
== 0);
4062 for (i
= 0; i
< n
; i
++) {
4063 /* Luminance comes from red channel */
4064 CLAMPED_FLOAT_TO_CHAN(dst
[0], rgba
[i
][RCOMP
]);
4065 dst
+= dstComponents
;
4073 * Same as _mesa_unpack_color_span_chan(), but return GLfloat data
4074 * instead of GLchan.
4077 _mesa_unpack_color_span_float( GLcontext
*ctx
,
4078 GLuint n
, GLenum dstFormat
, GLfloat dest
[],
4079 GLenum srcFormat
, GLenum srcType
,
4080 const GLvoid
*source
,
4081 const struct gl_pixelstore_attrib
*srcPacking
,
4082 GLbitfield transferOps
)
4084 ASSERT(dstFormat
== GL_ALPHA
||
4085 dstFormat
== GL_LUMINANCE
||
4086 dstFormat
== GL_LUMINANCE_ALPHA
||
4087 dstFormat
== GL_INTENSITY
||
4088 dstFormat
== GL_RGB
||
4089 dstFormat
== GL_RGBA
||
4090 dstFormat
== GL_COLOR_INDEX
);
4092 ASSERT(srcFormat
== GL_RED
||
4093 srcFormat
== GL_GREEN
||
4094 srcFormat
== GL_BLUE
||
4095 srcFormat
== GL_ALPHA
||
4096 srcFormat
== GL_LUMINANCE
||
4097 srcFormat
== GL_LUMINANCE_ALPHA
||
4098 srcFormat
== GL_INTENSITY
||
4099 srcFormat
== GL_RGB
||
4100 srcFormat
== GL_BGR
||
4101 srcFormat
== GL_RGBA
||
4102 srcFormat
== GL_BGRA
||
4103 srcFormat
== GL_ABGR_EXT
||
4104 srcFormat
== GL_COLOR_INDEX
);
4106 ASSERT(srcType
== GL_BITMAP
||
4107 srcType
== GL_UNSIGNED_BYTE
||
4108 srcType
== GL_BYTE
||
4109 srcType
== GL_UNSIGNED_SHORT
||
4110 srcType
== GL_SHORT
||
4111 srcType
== GL_UNSIGNED_INT
||
4112 srcType
== GL_INT
||
4113 srcType
== GL_HALF_FLOAT_ARB
||
4114 srcType
== GL_FLOAT
||
4115 srcType
== GL_UNSIGNED_BYTE_3_3_2
||
4116 srcType
== GL_UNSIGNED_BYTE_2_3_3_REV
||
4117 srcType
== GL_UNSIGNED_SHORT_5_6_5
||
4118 srcType
== GL_UNSIGNED_SHORT_5_6_5_REV
||
4119 srcType
== GL_UNSIGNED_SHORT_4_4_4_4
||
4120 srcType
== GL_UNSIGNED_SHORT_4_4_4_4_REV
||
4121 srcType
== GL_UNSIGNED_SHORT_5_5_5_1
||
4122 srcType
== GL_UNSIGNED_SHORT_1_5_5_5_REV
||
4123 srcType
== GL_UNSIGNED_INT_8_8_8_8
||
4124 srcType
== GL_UNSIGNED_INT_8_8_8_8_REV
||
4125 srcType
== GL_UNSIGNED_INT_10_10_10_2
||
4126 srcType
== GL_UNSIGNED_INT_2_10_10_10_REV
);
4128 /* general solution, no special cases, yet */
4130 GLint dstComponents
;
4131 GLint dstRedIndex
, dstGreenIndex
, dstBlueIndex
, dstAlphaIndex
;
4132 GLint dstLuminanceIndex
, dstIntensityIndex
;
4133 GLfloat rgba
[MAX_WIDTH
][4];
4135 dstComponents
= _mesa_components_in_format( dstFormat
);
4136 /* source & dest image formats should have been error checked by now */
4137 assert(dstComponents
> 0);
4140 * Extract image data and convert to RGBA floats
4142 assert(n
<= MAX_WIDTH
);
4143 if (srcFormat
== GL_COLOR_INDEX
) {
4144 GLuint indexes
[MAX_WIDTH
];
4145 extract_uint_indexes(n
, indexes
, srcFormat
, srcType
, source
,
4148 if (dstFormat
== GL_COLOR_INDEX
) {
4150 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4151 /* convert to GLchan and return */
4152 for (i
= 0; i
< n
; i
++) {
4153 dest
[i
] = (GLchan
) (indexes
[i
] & 0xff);
4158 /* Convert indexes to RGBA */
4159 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
4160 shift_and_offset_ci(ctx
, n
, indexes
);
4162 _mesa_map_ci_to_rgba(ctx
, n
, indexes
, rgba
);
4165 /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
4166 * with color indexes.
4168 transferOps
&= ~(IMAGE_SCALE_BIAS_BIT
| IMAGE_MAP_COLOR_BIT
);
4171 /* non-color index data */
4172 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
4173 srcPacking
->SwapBytes
);
4177 _mesa_apply_rgba_transfer_ops(ctx
, transferOps
, n
, rgba
);
4180 /* Now determine which color channels we need to produce.
4181 * And determine the dest index (offset) within each color tuple.
4183 switch (dstFormat
) {
4186 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
4187 dstLuminanceIndex
= dstIntensityIndex
= -1;
4190 dstLuminanceIndex
= 0;
4191 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
4192 dstIntensityIndex
= -1;
4194 case GL_LUMINANCE_ALPHA
:
4195 dstLuminanceIndex
= 0;
4197 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= -1;
4198 dstIntensityIndex
= -1;
4201 dstIntensityIndex
= 0;
4202 dstRedIndex
= dstGreenIndex
= dstBlueIndex
= dstAlphaIndex
= -1;
4203 dstLuminanceIndex
= -1;
4209 dstAlphaIndex
= dstLuminanceIndex
= dstIntensityIndex
= -1;
4216 dstLuminanceIndex
= dstIntensityIndex
= -1;
4219 _mesa_problem(ctx
, "bad dstFormat in _mesa_unpack_color_span_float()");
4223 /* Now pack results in the requested dstFormat */
4224 if (dstRedIndex
>= 0) {
4225 GLfloat
*dst
= dest
;
4227 for (i
= 0; i
< n
; i
++) {
4228 dst
[dstRedIndex
] = rgba
[i
][RCOMP
];
4229 dst
+= dstComponents
;
4233 if (dstGreenIndex
>= 0) {
4234 GLfloat
*dst
= dest
;
4236 for (i
= 0; i
< n
; i
++) {
4237 dst
[dstGreenIndex
] = rgba
[i
][GCOMP
];
4238 dst
+= dstComponents
;
4242 if (dstBlueIndex
>= 0) {
4243 GLfloat
*dst
= dest
;
4245 for (i
= 0; i
< n
; i
++) {
4246 dst
[dstBlueIndex
] = rgba
[i
][BCOMP
];
4247 dst
+= dstComponents
;
4251 if (dstAlphaIndex
>= 0) {
4252 GLfloat
*dst
= dest
;
4254 for (i
= 0; i
< n
; i
++) {
4255 dst
[dstAlphaIndex
] = rgba
[i
][ACOMP
];
4256 dst
+= dstComponents
;
4260 if (dstIntensityIndex
>= 0) {
4261 GLfloat
*dst
= dest
;
4263 assert(dstIntensityIndex
== 0);
4264 assert(dstComponents
== 1);
4265 for (i
= 0; i
< n
; i
++) {
4266 /* Intensity comes from red channel */
4267 dst
[i
] = rgba
[i
][RCOMP
];
4271 if (dstLuminanceIndex
>= 0) {
4272 GLfloat
*dst
= dest
;
4274 assert(dstLuminanceIndex
== 0);
4275 for (i
= 0; i
< n
; i
++) {
4276 /* Luminance comes from red channel */
4277 dst
[0] = rgba
[i
][RCOMP
];
4278 dst
+= dstComponents
;
4285 * Similar to _mesa_unpack_color_span_float(), but for dudv data instead of rgba,
4286 * directly return GLbyte data, no transfer ops apply.
4289 _mesa_unpack_dudv_span_byte( GLcontext
*ctx
,
4290 GLuint n
, GLenum dstFormat
, GLbyte dest
[],
4291 GLenum srcFormat
, GLenum srcType
,
4292 const GLvoid
*source
,
4293 const struct gl_pixelstore_attrib
*srcPacking
,
4294 GLbitfield transferOps
)
4296 ASSERT(dstFormat
== GL_DUDV_ATI
);
4297 ASSERT(srcFormat
== GL_DUDV_ATI
);
4299 ASSERT(srcType
== GL_UNSIGNED_BYTE
||
4300 srcType
== GL_BYTE
||
4301 srcType
== GL_UNSIGNED_SHORT
||
4302 srcType
== GL_SHORT
||
4303 srcType
== GL_UNSIGNED_INT
||
4304 srcType
== GL_INT
||
4305 srcType
== GL_HALF_FLOAT_ARB
||
4306 srcType
== GL_FLOAT
);
4308 /* general solution */
4310 GLint dstComponents
;
4311 GLfloat rgba
[MAX_WIDTH
][4];
4315 dstComponents
= _mesa_components_in_format( dstFormat
);
4316 /* source & dest image formats should have been error checked by now */
4317 assert(dstComponents
> 0);
4320 * Extract image data and convert to RGBA floats
4322 assert(n
<= MAX_WIDTH
);
4323 extract_float_rgba(n
, rgba
, srcFormat
, srcType
, source
,
4324 srcPacking
->SwapBytes
);
4327 /* Now determine which color channels we need to produce.
4328 * And determine the dest index (offset) within each color tuple.
4331 /* Now pack results in the requested dstFormat */
4332 for (i
= 0; i
< n
; i
++) {
4333 /* not sure - need clamp[-1,1] here? */
4334 dst
[0] = FLOAT_TO_BYTE(rgba
[i
][RCOMP
]);
4335 dst
[1] = FLOAT_TO_BYTE(rgba
[i
][GCOMP
]);
4336 dst
+= dstComponents
;
4342 * Unpack a row of color index data from a client buffer according to
4343 * the pixel unpacking parameters.
4344 * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
4346 * Args: ctx - the context
4347 * n - number of pixels
4348 * dstType - destination data type
4349 * dest - destination array
4350 * srcType - source pixel type
4351 * source - source data pointer
4352 * srcPacking - pixel unpacking parameters
4353 * transferOps - the pixel transfer operations to apply
4356 _mesa_unpack_index_span( const GLcontext
*ctx
, GLuint n
,
4357 GLenum dstType
, GLvoid
*dest
,
4358 GLenum srcType
, const GLvoid
*source
,
4359 const struct gl_pixelstore_attrib
*srcPacking
,
4360 GLbitfield transferOps
)
4362 ASSERT(srcType
== GL_BITMAP
||
4363 srcType
== GL_UNSIGNED_BYTE
||
4364 srcType
== GL_BYTE
||
4365 srcType
== GL_UNSIGNED_SHORT
||
4366 srcType
== GL_SHORT
||
4367 srcType
== GL_UNSIGNED_INT
||
4368 srcType
== GL_INT
||
4369 srcType
== GL_HALF_FLOAT_ARB
||
4370 srcType
== GL_FLOAT
);
4372 ASSERT(dstType
== GL_UNSIGNED_BYTE
||
4373 dstType
== GL_UNSIGNED_SHORT
||
4374 dstType
== GL_UNSIGNED_INT
);
4377 transferOps
&= (IMAGE_MAP_COLOR_BIT
| IMAGE_SHIFT_OFFSET_BIT
);
4380 * Try simple cases first
4382 if (transferOps
== 0 && srcType
== GL_UNSIGNED_BYTE
4383 && dstType
== GL_UNSIGNED_BYTE
) {
4384 memcpy(dest
, source
, n
* sizeof(GLubyte
));
4386 else if (transferOps
== 0 && srcType
== GL_UNSIGNED_INT
4387 && dstType
== GL_UNSIGNED_INT
&& !srcPacking
->SwapBytes
) {
4388 memcpy(dest
, source
, n
* sizeof(GLuint
));
4394 GLuint indexes
[MAX_WIDTH
];
4395 assert(n
<= MAX_WIDTH
);
4397 extract_uint_indexes(n
, indexes
, GL_COLOR_INDEX
, srcType
, source
,
4401 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4403 /* convert to dest type */
4405 case GL_UNSIGNED_BYTE
:
4407 GLubyte
*dst
= (GLubyte
*) dest
;
4409 for (i
= 0; i
< n
; i
++) {
4410 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
4414 case GL_UNSIGNED_SHORT
:
4416 GLuint
*dst
= (GLuint
*) dest
;
4418 for (i
= 0; i
< n
; i
++) {
4419 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
4423 case GL_UNSIGNED_INT
:
4424 memcpy(dest
, indexes
, n
* sizeof(GLuint
));
4427 _mesa_problem(ctx
, "bad dstType in _mesa_unpack_index_span");
4434 _mesa_pack_index_span( const GLcontext
*ctx
, GLuint n
,
4435 GLenum dstType
, GLvoid
*dest
, const GLuint
*source
,
4436 const struct gl_pixelstore_attrib
*dstPacking
,
4437 GLbitfield transferOps
)
4439 GLuint indexes
[MAX_WIDTH
];
4441 ASSERT(n
<= MAX_WIDTH
);
4443 transferOps
&= (IMAGE_MAP_COLOR_BIT
| IMAGE_SHIFT_OFFSET_BIT
);
4445 if (transferOps
& (IMAGE_MAP_COLOR_BIT
| IMAGE_SHIFT_OFFSET_BIT
)) {
4446 /* make a copy of input */
4447 memcpy(indexes
, source
, n
* sizeof(GLuint
));
4448 _mesa_apply_ci_transfer_ops(ctx
, transferOps
, n
, indexes
);
4453 case GL_UNSIGNED_BYTE
:
4455 GLubyte
*dst
= (GLubyte
*) dest
;
4457 for (i
= 0; i
< n
; i
++) {
4458 *dst
++ = (GLubyte
) source
[i
];
4464 GLbyte
*dst
= (GLbyte
*) dest
;
4466 for (i
= 0; i
< n
; i
++) {
4467 dst
[i
] = (GLbyte
) source
[i
];
4471 case GL_UNSIGNED_SHORT
:
4473 GLushort
*dst
= (GLushort
*) dest
;
4475 for (i
= 0; i
< n
; i
++) {
4476 dst
[i
] = (GLushort
) source
[i
];
4478 if (dstPacking
->SwapBytes
) {
4479 _mesa_swap2( (GLushort
*) dst
, n
);
4485 GLshort
*dst
= (GLshort
*) dest
;
4487 for (i
= 0; i
< n
; i
++) {
4488 dst
[i
] = (GLshort
) source
[i
];
4490 if (dstPacking
->SwapBytes
) {
4491 _mesa_swap2( (GLushort
*) dst
, n
);
4495 case GL_UNSIGNED_INT
:
4497 GLuint
*dst
= (GLuint
*) dest
;
4499 for (i
= 0; i
< n
; i
++) {
4500 dst
[i
] = (GLuint
) source
[i
];
4502 if (dstPacking
->SwapBytes
) {
4503 _mesa_swap4( (GLuint
*) dst
, n
);
4509 GLint
*dst
= (GLint
*) dest
;
4511 for (i
= 0; i
< n
; i
++) {
4512 dst
[i
] = (GLint
) source
[i
];
4514 if (dstPacking
->SwapBytes
) {
4515 _mesa_swap4( (GLuint
*) dst
, n
);
4521 GLfloat
*dst
= (GLfloat
*) dest
;
4523 for (i
= 0; i
< n
; i
++) {
4524 dst
[i
] = (GLfloat
) source
[i
];
4526 if (dstPacking
->SwapBytes
) {
4527 _mesa_swap4( (GLuint
*) dst
, n
);
4531 case GL_HALF_FLOAT_ARB
:
4533 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
4535 for (i
= 0; i
< n
; i
++) {
4536 dst
[i
] = _mesa_float_to_half((GLfloat
) source
[i
]);
4538 if (dstPacking
->SwapBytes
) {
4539 _mesa_swap2( (GLushort
*) dst
, n
);
4544 _mesa_problem(ctx
, "bad type in _mesa_pack_index_span");
4550 * Unpack a row of stencil data from a client buffer according to
4551 * the pixel unpacking parameters.
4552 * This is (or will be) used by glDrawPixels
4554 * Args: ctx - the context
4555 * n - number of pixels
4556 * dstType - destination data type
4557 * dest - destination array
4558 * srcType - source pixel type
4559 * source - source data pointer
4560 * srcPacking - pixel unpacking parameters
4561 * transferOps - apply offset/bias/lookup ops?
4564 _mesa_unpack_stencil_span( const GLcontext
*ctx
, GLuint n
,
4565 GLenum dstType
, GLvoid
*dest
,
4566 GLenum srcType
, const GLvoid
*source
,
4567 const struct gl_pixelstore_attrib
*srcPacking
,
4568 GLbitfield transferOps
)
4570 ASSERT(srcType
== GL_BITMAP
||
4571 srcType
== GL_UNSIGNED_BYTE
||
4572 srcType
== GL_BYTE
||
4573 srcType
== GL_UNSIGNED_SHORT
||
4574 srcType
== GL_SHORT
||
4575 srcType
== GL_UNSIGNED_INT
||
4576 srcType
== GL_INT
||
4577 srcType
== GL_UNSIGNED_INT_24_8_EXT
||
4578 srcType
== GL_HALF_FLOAT_ARB
||
4579 srcType
== GL_FLOAT
);
4581 ASSERT(dstType
== GL_UNSIGNED_BYTE
||
4582 dstType
== GL_UNSIGNED_SHORT
||
4583 dstType
== GL_UNSIGNED_INT
);
4585 /* only shift and offset apply to stencil */
4586 transferOps
&= IMAGE_SHIFT_OFFSET_BIT
;
4589 * Try simple cases first
4591 if (transferOps
== 0 &&
4592 !ctx
->Pixel
.MapStencilFlag
&&
4593 srcType
== GL_UNSIGNED_BYTE
&&
4594 dstType
== GL_UNSIGNED_BYTE
) {
4595 memcpy(dest
, source
, n
* sizeof(GLubyte
));
4597 else if (transferOps
== 0 &&
4598 !ctx
->Pixel
.MapStencilFlag
&&
4599 srcType
== GL_UNSIGNED_INT
&&
4600 dstType
== GL_UNSIGNED_INT
&&
4601 !srcPacking
->SwapBytes
) {
4602 memcpy(dest
, source
, n
* sizeof(GLuint
));
4608 GLuint indexes
[MAX_WIDTH
];
4609 assert(n
<= MAX_WIDTH
);
4611 extract_uint_indexes(n
, indexes
, GL_STENCIL_INDEX
, srcType
, source
,
4614 if (transferOps
& IMAGE_SHIFT_OFFSET_BIT
) {
4615 /* shift and offset indexes */
4616 shift_and_offset_ci(ctx
, n
, indexes
);
4619 if (ctx
->Pixel
.MapStencilFlag
) {
4620 /* Apply stencil lookup table */
4621 const GLuint mask
= ctx
->PixelMaps
.StoS
.Size
- 1;
4623 for (i
= 0; i
< n
; i
++) {
4624 indexes
[i
] = (GLuint
)ctx
->PixelMaps
.StoS
.Map
[ indexes
[i
] & mask
];
4628 /* convert to dest type */
4630 case GL_UNSIGNED_BYTE
:
4632 GLubyte
*dst
= (GLubyte
*) dest
;
4634 for (i
= 0; i
< n
; i
++) {
4635 dst
[i
] = (GLubyte
) (indexes
[i
] & 0xff);
4639 case GL_UNSIGNED_SHORT
:
4641 GLuint
*dst
= (GLuint
*) dest
;
4643 for (i
= 0; i
< n
; i
++) {
4644 dst
[i
] = (GLushort
) (indexes
[i
] & 0xffff);
4648 case GL_UNSIGNED_INT
:
4649 memcpy(dest
, indexes
, n
* sizeof(GLuint
));
4652 _mesa_problem(ctx
, "bad dstType in _mesa_unpack_stencil_span");
4659 _mesa_pack_stencil_span( const GLcontext
*ctx
, GLuint n
,
4660 GLenum dstType
, GLvoid
*dest
, const GLstencil
*source
,
4661 const struct gl_pixelstore_attrib
*dstPacking
)
4663 GLstencil stencil
[MAX_WIDTH
];
4665 ASSERT(n
<= MAX_WIDTH
);
4667 if (ctx
->Pixel
.IndexShift
|| ctx
->Pixel
.IndexOffset
||
4668 ctx
->Pixel
.MapStencilFlag
) {
4669 /* make a copy of input */
4670 memcpy(stencil
, source
, n
* sizeof(GLstencil
));
4671 _mesa_apply_stencil_transfer_ops(ctx
, n
, stencil
);
4676 case GL_UNSIGNED_BYTE
:
4677 if (sizeof(GLstencil
) == 1) {
4678 memcpy( dest
, source
, n
);
4681 GLubyte
*dst
= (GLubyte
*) dest
;
4684 dst
[i
] = (GLubyte
) source
[i
];
4690 GLbyte
*dst
= (GLbyte
*) dest
;
4693 dst
[i
] = (GLbyte
) (source
[i
] & 0x7f);
4697 case GL_UNSIGNED_SHORT
:
4699 GLushort
*dst
= (GLushort
*) dest
;
4702 dst
[i
] = (GLushort
) source
[i
];
4704 if (dstPacking
->SwapBytes
) {
4705 _mesa_swap2( (GLushort
*) dst
, n
);
4711 GLshort
*dst
= (GLshort
*) dest
;
4714 dst
[i
] = (GLshort
) source
[i
];
4716 if (dstPacking
->SwapBytes
) {
4717 _mesa_swap2( (GLushort
*) dst
, n
);
4721 case GL_UNSIGNED_INT
:
4723 GLuint
*dst
= (GLuint
*) dest
;
4726 dst
[i
] = (GLuint
) source
[i
];
4728 if (dstPacking
->SwapBytes
) {
4729 _mesa_swap4( (GLuint
*) dst
, n
);
4735 GLint
*dst
= (GLint
*) dest
;
4738 dst
[i
] = (GLint
) source
[i
];
4740 if (dstPacking
->SwapBytes
) {
4741 _mesa_swap4( (GLuint
*) dst
, n
);
4747 GLfloat
*dst
= (GLfloat
*) dest
;
4750 dst
[i
] = (GLfloat
) source
[i
];
4752 if (dstPacking
->SwapBytes
) {
4753 _mesa_swap4( (GLuint
*) dst
, n
);
4757 case GL_HALF_FLOAT_ARB
:
4759 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
4762 dst
[i
] = _mesa_float_to_half( (float) source
[i
] );
4764 if (dstPacking
->SwapBytes
) {
4765 _mesa_swap2( (GLushort
*) dst
, n
);
4770 if (dstPacking
->LsbFirst
) {
4771 GLubyte
*dst
= (GLubyte
*) dest
;
4774 for (i
= 0; i
< n
; i
++) {
4777 *dst
|= ((source
[i
] != 0) << shift
);
4786 GLubyte
*dst
= (GLubyte
*) dest
;
4789 for (i
= 0; i
< n
; i
++) {
4792 *dst
|= ((source
[i
] != 0) << shift
);
4802 _mesa_problem(ctx
, "bad type in _mesa_pack_index_span");
4806 #define DEPTH_VALUES(GLTYPE, GLTYPE2FLOAT) \
4809 const GLTYPE *src = (const GLTYPE *)source; \
4810 for (i = 0; i < n; i++) { \
4811 GLTYPE value = src[i]; \
4812 if (srcPacking->SwapBytes) { \
4813 if (sizeof(GLTYPE) == 2) { \
4815 } else if (sizeof(GLTYPE) == 4) { \
4819 depthValues[i] = GLTYPE2FLOAT(value); \
4825 * Unpack a row of depth/z values from memory, returning GLushort, GLuint
4826 * or GLfloat values.
4827 * The glPixelTransfer (scale/bias) params will be applied.
4829 * \param dstType one of GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, GL_FLOAT
4830 * \param depthMax max value for returned GLushort or GLuint values
4831 * (ignored for GLfloat).
4834 _mesa_unpack_depth_span( const GLcontext
*ctx
, GLuint n
,
4835 GLenum dstType
, GLvoid
*dest
, GLuint depthMax
,
4836 GLenum srcType
, const GLvoid
*source
,
4837 const struct gl_pixelstore_attrib
*srcPacking
)
4839 GLfloat depthTemp
[MAX_WIDTH
], *depthValues
;
4840 GLboolean needClamp
= GL_FALSE
;
4842 /* Look for special cases first.
4843 * Not only are these faster, they're less prone to numeric conversion
4844 * problems. Otherwise, converting from an int type to a float then
4845 * back to an int type can introduce errors that will show up as
4846 * artifacts in things like depth peeling which uses glCopyTexImage.
4848 if (ctx
->Pixel
.DepthScale
== 1.0 && ctx
->Pixel
.DepthBias
== 0.0) {
4849 if (srcType
== GL_UNSIGNED_INT
&& dstType
== GL_UNSIGNED_SHORT
) {
4850 const GLuint
*src
= (const GLuint
*) source
;
4851 GLushort
*dst
= (GLushort
*) dest
;
4853 for (i
= 0; i
< n
; i
++) {
4854 dst
[i
] = src
[i
] >> 16;
4858 if (srcType
== GL_UNSIGNED_SHORT
4859 && dstType
== GL_UNSIGNED_INT
4860 && depthMax
== 0xffffffff) {
4861 const GLushort
*src
= (const GLushort
*) source
;
4862 GLuint
*dst
= (GLuint
*) dest
;
4864 for (i
= 0; i
< n
; i
++) {
4865 dst
[i
] = src
[i
] | (src
[i
] << 16);
4869 if (srcType
== GL_UNSIGNED_INT_24_8
4870 && dstType
== GL_UNSIGNED_INT
4871 && depthMax
== 0xffffff) {
4872 const GLuint
*src
= (const GLuint
*) source
;
4873 GLuint
*dst
= (GLuint
*) dest
;
4875 for (i
= 0; i
< n
; i
++) {
4876 dst
[i
] = src
[i
] >> 8;
4880 /* XXX may want to add additional cases here someday */
4883 /* general case path follows */
4885 if (dstType
== GL_FLOAT
) {
4886 depthValues
= (GLfloat
*) dest
;
4889 depthValues
= depthTemp
;
4892 /* Convert incoming values to GLfloat. Some conversions will require
4897 DEPTH_VALUES(GLbyte
, BYTE_TO_FLOAT
);
4898 needClamp
= GL_TRUE
;
4900 case GL_UNSIGNED_BYTE
:
4901 DEPTH_VALUES(GLubyte
, UBYTE_TO_FLOAT
);
4904 DEPTH_VALUES(GLshort
, SHORT_TO_FLOAT
);
4905 needClamp
= GL_TRUE
;
4907 case GL_UNSIGNED_SHORT
:
4908 DEPTH_VALUES(GLushort
, USHORT_TO_FLOAT
);
4911 DEPTH_VALUES(GLint
, INT_TO_FLOAT
);
4912 needClamp
= GL_TRUE
;
4914 case GL_UNSIGNED_INT
:
4915 DEPTH_VALUES(GLuint
, UINT_TO_FLOAT
);
4917 case GL_UNSIGNED_INT_24_8_EXT
: /* GL_EXT_packed_depth_stencil */
4918 if (dstType
== GL_UNSIGNED_INT_24_8_EXT
&&
4919 depthMax
== 0xffffff &&
4920 ctx
->Pixel
.DepthScale
== 1.0 &&
4921 ctx
->Pixel
.DepthBias
== 0.0) {
4922 const GLuint
*src
= (const GLuint
*) source
;
4923 GLuint
*zValues
= (GLuint
*) dest
;
4925 for (i
= 0; i
< n
; i
++) {
4926 GLuint value
= src
[i
];
4927 if (srcPacking
->SwapBytes
) {
4930 zValues
[i
] = value
& 0xffffff00;
4935 const GLuint
*src
= (const GLuint
*) source
;
4936 const GLfloat scale
= 1.0f
/ 0xffffff;
4938 for (i
= 0; i
< n
; i
++) {
4939 GLuint value
= src
[i
];
4940 if (srcPacking
->SwapBytes
) {
4943 depthValues
[i
] = (value
>> 8) * scale
;
4948 DEPTH_VALUES(GLfloat
, 1*);
4949 needClamp
= GL_TRUE
;
4951 case GL_HALF_FLOAT_ARB
:
4954 const GLhalfARB
*src
= (const GLhalfARB
*) source
;
4955 for (i
= 0; i
< n
; i
++) {
4956 GLhalfARB value
= src
[i
];
4957 if (srcPacking
->SwapBytes
) {
4960 depthValues
[i
] = _mesa_half_to_float(value
);
4962 needClamp
= GL_TRUE
;
4966 _mesa_problem(NULL
, "bad type in _mesa_unpack_depth_span()");
4970 /* apply depth scale and bias */
4972 const GLfloat scale
= ctx
->Pixel
.DepthScale
;
4973 const GLfloat bias
= ctx
->Pixel
.DepthBias
;
4974 if (scale
!= 1.0 || bias
!= 0.0) {
4976 for (i
= 0; i
< n
; i
++) {
4977 depthValues
[i
] = depthValues
[i
] * scale
+ bias
;
4979 needClamp
= GL_TRUE
;
4983 /* clamp to [0, 1] */
4986 for (i
= 0; i
< n
; i
++) {
4987 depthValues
[i
] = (GLfloat
)CLAMP(depthValues
[i
], 0.0, 1.0);
4992 * Convert values to dstType
4994 if (dstType
== GL_UNSIGNED_INT
) {
4995 GLuint
*zValues
= (GLuint
*) dest
;
4997 if (depthMax
<= 0xffffff) {
4998 /* no overflow worries */
4999 for (i
= 0; i
< n
; i
++) {
5000 zValues
[i
] = (GLuint
) (depthValues
[i
] * (GLfloat
) depthMax
);
5004 /* need to use double precision to prevent overflow problems */
5005 for (i
= 0; i
< n
; i
++) {
5006 GLdouble z
= depthValues
[i
] * (GLfloat
) depthMax
;
5007 if (z
>= (GLdouble
) 0xffffffff)
5008 zValues
[i
] = 0xffffffff;
5010 zValues
[i
] = (GLuint
) z
;
5014 else if (dstType
== GL_UNSIGNED_SHORT
) {
5015 GLushort
*zValues
= (GLushort
*) dest
;
5017 ASSERT(depthMax
<= 0xffff);
5018 for (i
= 0; i
< n
; i
++) {
5019 zValues
[i
] = (GLushort
) (depthValues
[i
] * (GLfloat
) depthMax
);
5023 ASSERT(dstType
== GL_FLOAT
);
5024 /*ASSERT(depthMax == 1.0F);*/
5030 * Pack an array of depth values. The values are floats in [0,1].
5033 _mesa_pack_depth_span( const GLcontext
*ctx
, GLuint n
, GLvoid
*dest
,
5034 GLenum dstType
, const GLfloat
*depthSpan
,
5035 const struct gl_pixelstore_attrib
*dstPacking
)
5037 GLfloat depthCopy
[MAX_WIDTH
];
5039 ASSERT(n
<= MAX_WIDTH
);
5041 if (ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0) {
5042 memcpy(depthCopy
, depthSpan
, n
* sizeof(GLfloat
));
5043 _mesa_scale_and_bias_depth(ctx
, n
, depthCopy
);
5044 depthSpan
= depthCopy
;
5048 case GL_UNSIGNED_BYTE
:
5050 GLubyte
*dst
= (GLubyte
*) dest
;
5052 for (i
= 0; i
< n
; i
++) {
5053 dst
[i
] = FLOAT_TO_UBYTE( depthSpan
[i
] );
5059 GLbyte
*dst
= (GLbyte
*) dest
;
5061 for (i
= 0; i
< n
; i
++) {
5062 dst
[i
] = FLOAT_TO_BYTE( depthSpan
[i
] );
5066 case GL_UNSIGNED_SHORT
:
5068 GLushort
*dst
= (GLushort
*) dest
;
5070 for (i
= 0; i
< n
; i
++) {
5071 CLAMPED_FLOAT_TO_USHORT(dst
[i
], depthSpan
[i
]);
5073 if (dstPacking
->SwapBytes
) {
5074 _mesa_swap2( (GLushort
*) dst
, n
);
5080 GLshort
*dst
= (GLshort
*) dest
;
5082 for (i
= 0; i
< n
; i
++) {
5083 dst
[i
] = FLOAT_TO_SHORT( depthSpan
[i
] );
5085 if (dstPacking
->SwapBytes
) {
5086 _mesa_swap2( (GLushort
*) dst
, n
);
5090 case GL_UNSIGNED_INT
:
5092 GLuint
*dst
= (GLuint
*) dest
;
5094 for (i
= 0; i
< n
; i
++) {
5095 dst
[i
] = FLOAT_TO_UINT( depthSpan
[i
] );
5097 if (dstPacking
->SwapBytes
) {
5098 _mesa_swap4( (GLuint
*) dst
, n
);
5104 GLint
*dst
= (GLint
*) dest
;
5106 for (i
= 0; i
< n
; i
++) {
5107 dst
[i
] = FLOAT_TO_INT( depthSpan
[i
] );
5109 if (dstPacking
->SwapBytes
) {
5110 _mesa_swap4( (GLuint
*) dst
, n
);
5116 GLfloat
*dst
= (GLfloat
*) dest
;
5118 for (i
= 0; i
< n
; i
++) {
5119 dst
[i
] = depthSpan
[i
];
5121 if (dstPacking
->SwapBytes
) {
5122 _mesa_swap4( (GLuint
*) dst
, n
);
5126 case GL_HALF_FLOAT_ARB
:
5128 GLhalfARB
*dst
= (GLhalfARB
*) dest
;
5130 for (i
= 0; i
< n
; i
++) {
5131 dst
[i
] = _mesa_float_to_half(depthSpan
[i
]);
5133 if (dstPacking
->SwapBytes
) {
5134 _mesa_swap2( (GLushort
*) dst
, n
);
5139 _mesa_problem(ctx
, "bad type in _mesa_pack_depth_span");
5146 * Pack depth and stencil values as GL_DEPTH_STENCIL/GL_UNSIGNED_INT_24_8.
5149 _mesa_pack_depth_stencil_span(const GLcontext
*ctx
, GLuint n
, GLuint
*dest
,
5150 const GLfloat
*depthVals
,
5151 const GLstencil
*stencilVals
,
5152 const struct gl_pixelstore_attrib
*dstPacking
)
5154 GLfloat depthCopy
[MAX_WIDTH
];
5155 GLstencil stencilCopy
[MAX_WIDTH
];
5158 ASSERT(n
<= MAX_WIDTH
);
5160 if (ctx
->Pixel
.DepthScale
!= 1.0 || ctx
->Pixel
.DepthBias
!= 0.0) {
5161 memcpy(depthCopy
, depthVals
, n
* sizeof(GLfloat
));
5162 _mesa_scale_and_bias_depth(ctx
, n
, depthCopy
);
5163 depthVals
= depthCopy
;
5166 if (ctx
->Pixel
.IndexShift
||
5167 ctx
->Pixel
.IndexOffset
||
5168 ctx
->Pixel
.MapStencilFlag
) {
5169 memcpy(stencilCopy
, stencilVals
, n
* sizeof(GLstencil
));
5170 _mesa_apply_stencil_transfer_ops(ctx
, n
, stencilCopy
);
5171 stencilVals
= stencilCopy
;
5174 for (i
= 0; i
< n
; i
++) {
5175 GLuint z
= (GLuint
) (depthVals
[i
] * 0xffffff);
5176 dest
[i
] = (z
<< 8) | (stencilVals
[i
] & 0xff);
5179 if (dstPacking
->SwapBytes
) {
5180 _mesa_swap4(dest
, n
);
5188 * Unpack image data. Apply byte swapping, byte flipping (bitmap).
5189 * Return all image data in a contiguous block. This is used when we
5190 * compile glDrawPixels, glTexImage, etc into a display list. We
5191 * need a copy of the data in a standard format.
5194 _mesa_unpack_image( GLuint dimensions
,
5195 GLsizei width
, GLsizei height
, GLsizei depth
,
5196 GLenum format
, GLenum type
, const GLvoid
*pixels
,
5197 const struct gl_pixelstore_attrib
*unpack
)
5199 GLint bytesPerRow
, compsPerRow
;
5200 GLboolean flipBytes
, swap2
, swap4
;
5203 return NULL
; /* not necessarily an error */
5205 if (width
<= 0 || height
<= 0 || depth
<= 0)
5206 return NULL
; /* generate error later */
5208 if (type
== GL_BITMAP
) {
5209 bytesPerRow
= (width
+ 7) >> 3;
5210 flipBytes
= unpack
->LsbFirst
;
5211 swap2
= swap4
= GL_FALSE
;
5215 const GLint bytesPerPixel
= _mesa_bytes_per_pixel(format
, type
);
5216 GLint components
= _mesa_components_in_format(format
);
5219 if (_mesa_type_is_packed(type
))
5222 if (bytesPerPixel
<= 0 || components
<= 0)
5223 return NULL
; /* bad format or type. generate error later */
5224 bytesPerRow
= bytesPerPixel
* width
;
5225 bytesPerComp
= bytesPerPixel
/ components
;
5226 flipBytes
= GL_FALSE
;
5227 swap2
= (bytesPerComp
== 2) && unpack
->SwapBytes
;
5228 swap4
= (bytesPerComp
== 4) && unpack
->SwapBytes
;
5229 compsPerRow
= components
* width
;
5230 assert(compsPerRow
>= width
);
5235 = (GLubyte
*) malloc(bytesPerRow
* height
* depth
);
5239 return NULL
; /* generate GL_OUT_OF_MEMORY later */
5242 for (img
= 0; img
< depth
; img
++) {
5243 for (row
= 0; row
< height
; row
++) {
5244 const GLvoid
*src
= _mesa_image_address(dimensions
, unpack
, pixels
,
5245 width
, height
, format
, type
, img
, row
, 0);
5247 if ((type
== GL_BITMAP
) && (unpack
->SkipPixels
& 0x7)) {
5249 flipBytes
= GL_FALSE
;
5250 if (unpack
->LsbFirst
) {
5251 GLubyte srcMask
= 1 << (unpack
->SkipPixels
& 0x7);
5252 GLubyte dstMask
= 128;
5253 const GLubyte
*s
= src
;
5256 for (i
= 0; i
< width
; i
++) {
5260 if (srcMask
== 128) {
5265 srcMask
= srcMask
<< 1;
5273 dstMask
= dstMask
>> 1;
5278 GLubyte srcMask
= 128 >> (unpack
->SkipPixels
& 0x7);
5279 GLubyte dstMask
= 128;
5280 const GLubyte
*s
= src
;
5283 for (i
= 0; i
< width
; i
++) {
5292 srcMask
= srcMask
>> 1;
5300 dstMask
= dstMask
>> 1;
5306 memcpy(dst
, src
, bytesPerRow
);
5309 /* byte flipping/swapping */
5311 flip_bytes((GLubyte
*) dst
, bytesPerRow
);
5314 _mesa_swap2((GLushort
*) dst
, compsPerRow
);
5317 _mesa_swap4((GLuint
*) dst
, compsPerRow
);
5326 #endif /* _HAVE_FULL_GL */
5331 * Convert an array of RGBA colors from one datatype to another.
5332 * NOTE: src may equal dst. In that case, we use a temporary buffer.
5335 _mesa_convert_colors(GLenum srcType
, const GLvoid
*src
,
5336 GLenum dstType
, GLvoid
*dst
,
5337 GLuint count
, const GLubyte mask
[])
5339 GLuint tempBuffer
[MAX_WIDTH
][4];
5340 const GLboolean useTemp
= (src
== dst
);
5342 ASSERT(srcType
!= dstType
);
5345 case GL_UNSIGNED_BYTE
:
5346 if (dstType
== GL_UNSIGNED_SHORT
) {
5347 const GLubyte (*src1
)[4] = (const GLubyte (*)[4]) src
;
5348 GLushort (*dst2
)[4] = (GLushort (*)[4]) (useTemp
? tempBuffer
: dst
);
5350 for (i
= 0; i
< count
; i
++) {
5351 if (!mask
|| mask
[i
]) {
5352 dst2
[i
][RCOMP
] = UBYTE_TO_USHORT(src1
[i
][RCOMP
]);
5353 dst2
[i
][GCOMP
] = UBYTE_TO_USHORT(src1
[i
][GCOMP
]);
5354 dst2
[i
][BCOMP
] = UBYTE_TO_USHORT(src1
[i
][BCOMP
]);
5355 dst2
[i
][ACOMP
] = UBYTE_TO_USHORT(src1
[i
][ACOMP
]);
5359 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLushort
));
5362 const GLubyte (*src1
)[4] = (const GLubyte (*)[4]) src
;
5363 GLfloat (*dst4
)[4] = (GLfloat (*)[4]) (useTemp
? tempBuffer
: dst
);
5365 ASSERT(dstType
== GL_FLOAT
);
5366 for (i
= 0; i
< count
; i
++) {
5367 if (!mask
|| mask
[i
]) {
5368 dst4
[i
][RCOMP
] = UBYTE_TO_FLOAT(src1
[i
][RCOMP
]);
5369 dst4
[i
][GCOMP
] = UBYTE_TO_FLOAT(src1
[i
][GCOMP
]);
5370 dst4
[i
][BCOMP
] = UBYTE_TO_FLOAT(src1
[i
][BCOMP
]);
5371 dst4
[i
][ACOMP
] = UBYTE_TO_FLOAT(src1
[i
][ACOMP
]);
5375 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLfloat
));
5378 case GL_UNSIGNED_SHORT
:
5379 if (dstType
== GL_UNSIGNED_BYTE
) {
5380 const GLushort (*src2
)[4] = (const GLushort (*)[4]) src
;
5381 GLubyte (*dst1
)[4] = (GLubyte (*)[4]) (useTemp
? tempBuffer
: dst
);
5383 for (i
= 0; i
< count
; i
++) {
5384 if (!mask
|| mask
[i
]) {
5385 dst1
[i
][RCOMP
] = USHORT_TO_UBYTE(src2
[i
][RCOMP
]);
5386 dst1
[i
][GCOMP
] = USHORT_TO_UBYTE(src2
[i
][GCOMP
]);
5387 dst1
[i
][BCOMP
] = USHORT_TO_UBYTE(src2
[i
][BCOMP
]);
5388 dst1
[i
][ACOMP
] = USHORT_TO_UBYTE(src2
[i
][ACOMP
]);
5392 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLubyte
));
5395 const GLushort (*src2
)[4] = (const GLushort (*)[4]) src
;
5396 GLfloat (*dst4
)[4] = (GLfloat (*)[4]) (useTemp
? tempBuffer
: dst
);
5398 ASSERT(dstType
== GL_FLOAT
);
5399 for (i
= 0; i
< count
; i
++) {
5400 if (!mask
|| mask
[i
]) {
5401 dst4
[i
][RCOMP
] = USHORT_TO_FLOAT(src2
[i
][RCOMP
]);
5402 dst4
[i
][GCOMP
] = USHORT_TO_FLOAT(src2
[i
][GCOMP
]);
5403 dst4
[i
][BCOMP
] = USHORT_TO_FLOAT(src2
[i
][BCOMP
]);
5404 dst4
[i
][ACOMP
] = USHORT_TO_FLOAT(src2
[i
][ACOMP
]);
5408 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLfloat
));
5412 if (dstType
== GL_UNSIGNED_BYTE
) {
5413 const GLfloat (*src4
)[4] = (const GLfloat (*)[4]) src
;
5414 GLubyte (*dst1
)[4] = (GLubyte (*)[4]) (useTemp
? tempBuffer
: dst
);
5416 for (i
= 0; i
< count
; i
++) {
5417 if (!mask
|| mask
[i
]) {
5418 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][RCOMP
], src4
[i
][RCOMP
]);
5419 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][GCOMP
], src4
[i
][GCOMP
]);
5420 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][BCOMP
], src4
[i
][BCOMP
]);
5421 UNCLAMPED_FLOAT_TO_UBYTE(dst1
[i
][ACOMP
], src4
[i
][ACOMP
]);
5425 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLubyte
));
5428 const GLfloat (*src4
)[4] = (const GLfloat (*)[4]) src
;
5429 GLushort (*dst2
)[4] = (GLushort (*)[4]) (useTemp
? tempBuffer
: dst
);
5431 ASSERT(dstType
== GL_UNSIGNED_SHORT
);
5432 for (i
= 0; i
< count
; i
++) {
5433 if (!mask
|| mask
[i
]) {
5434 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][RCOMP
], src4
[i
][RCOMP
]);
5435 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][GCOMP
], src4
[i
][GCOMP
]);
5436 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][BCOMP
], src4
[i
][BCOMP
]);
5437 UNCLAMPED_FLOAT_TO_USHORT(dst2
[i
][ACOMP
], src4
[i
][ACOMP
]);
5441 memcpy(dst
, tempBuffer
, count
* 4 * sizeof(GLushort
));
5445 _mesa_problem(NULL
, "Invalid datatype in _mesa_convert_colors");
5453 * Perform basic clipping for glDrawPixels. The image's position and size
5454 * and the unpack SkipPixels and SkipRows are adjusted so that the image
5455 * region is entirely within the window and scissor bounds.
5456 * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).
5457 * If Pixel.ZoomY is -1, *destY will be changed to be the first row which
5458 * we'll actually write. Beforehand, *destY-1 is the first drawing row.
5460 * \return GL_TRUE if image is ready for drawing or
5461 * GL_FALSE if image was completely clipped away (draw nothing)
5464 _mesa_clip_drawpixels(const GLcontext
*ctx
,
5465 GLint
*destX
, GLint
*destY
,
5466 GLsizei
*width
, GLsizei
*height
,
5467 struct gl_pixelstore_attrib
*unpack
)
5469 const GLframebuffer
*buffer
= ctx
->DrawBuffer
;
5471 if (unpack
->RowLength
== 0) {
5472 unpack
->RowLength
= *width
;
5475 ASSERT(ctx
->Pixel
.ZoomX
== 1.0F
);
5476 ASSERT(ctx
->Pixel
.ZoomY
== 1.0F
|| ctx
->Pixel
.ZoomY
== -1.0F
);
5479 if (*destX
< buffer
->_Xmin
) {
5480 unpack
->SkipPixels
+= (buffer
->_Xmin
- *destX
);
5481 *width
-= (buffer
->_Xmin
- *destX
);
5482 *destX
= buffer
->_Xmin
;
5484 /* right clipping */
5485 if (*destX
+ *width
> buffer
->_Xmax
)
5486 *width
-= (*destX
+ *width
- buffer
->_Xmax
);
5491 if (ctx
->Pixel
.ZoomY
== 1.0F
) {
5492 /* bottom clipping */
5493 if (*destY
< buffer
->_Ymin
) {
5494 unpack
->SkipRows
+= (buffer
->_Ymin
- *destY
);
5495 *height
-= (buffer
->_Ymin
- *destY
);
5496 *destY
= buffer
->_Ymin
;
5499 if (*destY
+ *height
> buffer
->_Ymax
)
5500 *height
-= (*destY
+ *height
- buffer
->_Ymax
);
5502 else { /* upside down */
5504 if (*destY
> buffer
->_Ymax
) {
5505 unpack
->SkipRows
+= (*destY
- buffer
->_Ymax
);
5506 *height
-= (*destY
- buffer
->_Ymax
);
5507 *destY
= buffer
->_Ymax
;
5509 /* bottom clipping */
5510 if (*destY
- *height
< buffer
->_Ymin
)
5511 *height
-= (buffer
->_Ymin
- (*destY
- *height
));
5512 /* adjust destY so it's the first row to write to */
5524 * Perform clipping for glReadPixels. The image's window position
5525 * and size, and the pack skipPixels, skipRows and rowLength are adjusted
5526 * so that the image region is entirely within the window bounds.
5527 * Note: this is different from _mesa_clip_drawpixels() in that the
5528 * scissor box is ignored, and we use the bounds of the current readbuffer
5531 * \return GL_TRUE if image is ready for drawing or
5532 * GL_FALSE if image was completely clipped away (draw nothing)
5535 _mesa_clip_readpixels(const GLcontext
*ctx
,
5536 GLint
*srcX
, GLint
*srcY
,
5537 GLsizei
*width
, GLsizei
*height
,
5538 struct gl_pixelstore_attrib
*pack
)
5540 const GLframebuffer
*buffer
= ctx
->ReadBuffer
;
5542 if (pack
->RowLength
== 0) {
5543 pack
->RowLength
= *width
;
5548 pack
->SkipPixels
+= (0 - *srcX
);
5549 *width
-= (0 - *srcX
);
5552 /* right clipping */
5553 if (*srcX
+ *width
> (GLsizei
) buffer
->Width
)
5554 *width
-= (*srcX
+ *width
- buffer
->Width
);
5559 /* bottom clipping */
5561 pack
->SkipRows
+= (0 - *srcY
);
5562 *height
-= (0 - *srcY
);
5566 if (*srcY
+ *height
> (GLsizei
) buffer
->Height
)
5567 *height
-= (*srcY
+ *height
- buffer
->Height
);
5577 * Do clipping for a glCopyTexSubImage call.
5578 * The framebuffer source region might extend outside the framebuffer
5579 * bounds. Clip the source region against the framebuffer bounds and
5580 * adjust the texture/dest position and size accordingly.
5582 * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise.
5585 _mesa_clip_copytexsubimage(const GLcontext
*ctx
,
5586 GLint
*destX
, GLint
*destY
,
5587 GLint
*srcX
, GLint
*srcY
,
5588 GLsizei
*width
, GLsizei
*height
)
5590 const struct gl_framebuffer
*fb
= ctx
->ReadBuffer
;
5591 const GLint srcX0
= *srcX
, srcY0
= *srcY
;
5593 if (_mesa_clip_to_region(0, 0, fb
->Width
, fb
->Height
,
5594 srcX
, srcY
, width
, height
)) {
5595 *destX
= *destX
+ *srcX
- srcX0
;
5596 *destY
= *destY
+ *srcY
- srcY0
;
5608 * Clip the rectangle defined by (x, y, width, height) against the bounds
5609 * specified by [xmin, xmax) and [ymin, ymax).
5610 * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.
5613 _mesa_clip_to_region(GLint xmin
, GLint ymin
,
5614 GLint xmax
, GLint ymax
,
5616 GLsizei
*width
, GLsizei
*height
)
5620 *width
-= (xmin
- *x
);
5624 /* right clipping */
5625 if (*x
+ *width
> xmax
)
5626 *width
-= (*x
+ *width
- xmax
);
5631 /* bottom (or top) clipping */
5633 *height
-= (ymin
- *y
);
5637 /* top (or bottom) clipping */
5638 if (*y
+ *height
> ymax
)
5639 *height
-= (*y
+ *height
- ymax
);
5649 * Clip dst coords against Xmax (or Ymax).
5652 clip_right_or_top(GLint
*srcX0
, GLint
*srcX1
,
5653 GLint
*dstX0
, GLint
*dstX1
,
5658 if (*dstX1
> maxValue
) {
5659 /* X1 outside right edge */
5660 ASSERT(*dstX0
< maxValue
); /* X0 should be inside right edge */
5661 t
= (GLfloat
) (maxValue
- *dstX0
) / (GLfloat
) (*dstX1
- *dstX0
);
5662 /* chop off [t, 1] part */
5663 ASSERT(t
>= 0.0 && t
<= 1.0);
5665 bias
= (*srcX0
< *srcX1
) ? 0.5F
: -0.5F
;
5666 *srcX1
= *srcX0
+ (GLint
) (t
* (*srcX1
- *srcX0
) + bias
);
5668 else if (*dstX0
> maxValue
) {
5669 /* X0 outside right edge */
5670 ASSERT(*dstX1
< maxValue
); /* X1 should be inside right edge */
5671 t
= (GLfloat
) (maxValue
- *dstX1
) / (GLfloat
) (*dstX0
- *dstX1
);
5672 /* chop off [t, 1] part */
5673 ASSERT(t
>= 0.0 && t
<= 1.0);
5675 bias
= (*srcX0
< *srcX1
) ? -0.5F
: 0.5F
;
5676 *srcX0
= *srcX1
+ (GLint
) (t
* (*srcX0
- *srcX1
) + bias
);
5682 * Clip dst coords against Xmin (or Ymin).
5685 clip_left_or_bottom(GLint
*srcX0
, GLint
*srcX1
,
5686 GLint
*dstX0
, GLint
*dstX1
,
5691 if (*dstX0
< minValue
) {
5692 /* X0 outside left edge */
5693 ASSERT(*dstX1
> minValue
); /* X1 should be inside left edge */
5694 t
= (GLfloat
) (minValue
- *dstX0
) / (GLfloat
) (*dstX1
- *dstX0
);
5695 /* chop off [0, t] part */
5696 ASSERT(t
>= 0.0 && t
<= 1.0);
5698 bias
= (*srcX0
< *srcX1
) ? 0.5F
: -0.5F
; /* flipped??? */
5699 *srcX0
= *srcX0
+ (GLint
) (t
* (*srcX1
- *srcX0
) + bias
);
5701 else if (*dstX1
< minValue
) {
5702 /* X1 outside left edge */
5703 ASSERT(*dstX0
> minValue
); /* X0 should be inside left edge */
5704 t
= (GLfloat
) (minValue
- *dstX1
) / (GLfloat
) (*dstX0
- *dstX1
);
5705 /* chop off [0, t] part */
5706 ASSERT(t
>= 0.0 && t
<= 1.0);
5708 bias
= (*srcX0
< *srcX1
) ? 0.5F
: -0.5F
;
5709 *srcX1
= *srcX1
+ (GLint
) (t
* (*srcX0
- *srcX1
) + bias
);
5715 * Do clipping of blit src/dest rectangles.
5716 * The dest rect is clipped against both the buffer bounds and scissor bounds.
5717 * The src rect is just clipped against the buffer bounds.
5719 * When either the src or dest rect is clipped, the other is also clipped
5722 * Note that X0 need not be less than X1 (same for Y) for either the source
5723 * and dest rects. That makes the clipping a little trickier.
5725 * \return GL_TRUE if anything is left to draw, GL_FALSE if totally clipped
5728 _mesa_clip_blit(GLcontext
*ctx
,
5729 GLint
*srcX0
, GLint
*srcY0
, GLint
*srcX1
, GLint
*srcY1
,
5730 GLint
*dstX0
, GLint
*dstY0
, GLint
*dstX1
, GLint
*dstY1
)
5732 const GLint srcXmin
= 0;
5733 const GLint srcXmax
= ctx
->ReadBuffer
->Width
;
5734 const GLint srcYmin
= 0;
5735 const GLint srcYmax
= ctx
->ReadBuffer
->Height
;
5737 /* these include scissor bounds */
5738 const GLint dstXmin
= ctx
->DrawBuffer
->_Xmin
;
5739 const GLint dstXmax
= ctx
->DrawBuffer
->_Xmax
;
5740 const GLint dstYmin
= ctx
->DrawBuffer
->_Ymin
;
5741 const GLint dstYmax
= ctx
->DrawBuffer
->_Ymax
;
5744 printf("PreClipX: src: %d .. %d dst: %d .. %d\n",
5745 *srcX0, *srcX1, *dstX0, *dstX1);
5746 printf("PreClipY: src: %d .. %d dst: %d .. %d\n",
5747 *srcY0, *srcY1, *dstY0, *dstY1);
5750 /* trivial rejection tests */
5751 if (*dstX0
== *dstX1
)
5752 return GL_FALSE
; /* no width */
5753 if (*dstX0
<= dstXmin
&& *dstX1
<= dstXmin
)
5754 return GL_FALSE
; /* totally out (left) of bounds */
5755 if (*dstX0
>= dstXmax
&& *dstX1
>= dstXmax
)
5756 return GL_FALSE
; /* totally out (right) of bounds */
5758 if (*dstY0
== *dstY1
)
5760 if (*dstY0
<= dstYmin
&& *dstY1
<= dstYmin
)
5762 if (*dstY0
>= dstYmax
&& *dstY1
>= dstYmax
)
5765 if (*srcX0
== *srcX1
)
5767 if (*srcX0
<= srcXmin
&& *srcX1
<= srcXmin
)
5769 if (*srcX0
>= srcXmax
&& *srcX1
>= srcXmax
)
5772 if (*srcY0
== *srcY1
)
5774 if (*srcY0
<= srcYmin
&& *srcY1
<= srcYmin
)
5776 if (*srcY0
>= srcYmax
&& *srcY1
>= srcYmax
)
5782 clip_right_or_top(srcX0
, srcX1
, dstX0
, dstX1
, dstXmax
);
5783 clip_right_or_top(srcY0
, srcY1
, dstY0
, dstY1
, dstYmax
);
5784 clip_left_or_bottom(srcX0
, srcX1
, dstX0
, dstX1
, dstXmin
);
5785 clip_left_or_bottom(srcY0
, srcY1
, dstY0
, dstY1
, dstYmin
);
5788 * src clip (just swap src/dst values from above)
5790 clip_right_or_top(dstX0
, dstX1
, srcX0
, srcX1
, srcXmax
);
5791 clip_right_or_top(dstY0
, dstY1
, srcY0
, srcY1
, srcYmax
);
5792 clip_left_or_bottom(dstX0
, dstX1
, srcX0
, srcX1
, srcXmin
);
5793 clip_left_or_bottom(dstY0
, dstY1
, srcY0
, srcY1
, srcYmin
);
5796 printf("PostClipX: src: %d .. %d dst: %d .. %d\n",
5797 *srcX0, *srcX1, *dstX0, *dstX1);
5798 printf("PostClipY: src: %d .. %d dst: %d .. %d\n",
5799 *srcY0, *srcY1, *dstY0, *dstY1);
5802 ASSERT(*dstX0
>= dstXmin
);
5803 ASSERT(*dstX0
<= dstXmax
);
5804 ASSERT(*dstX1
>= dstXmin
);
5805 ASSERT(*dstX1
<= dstXmax
);
5807 ASSERT(*dstY0
>= dstYmin
);
5808 ASSERT(*dstY0
<= dstYmax
);
5809 ASSERT(*dstY1
>= dstYmin
);
5810 ASSERT(*dstY1
<= dstYmax
);
5812 ASSERT(*srcX0
>= srcXmin
);
5813 ASSERT(*srcX0
<= srcXmax
);
5814 ASSERT(*srcX1
>= srcXmin
);
5815 ASSERT(*srcX1
<= srcXmax
);
5817 ASSERT(*srcY0
>= srcYmin
);
5818 ASSERT(*srcY0
<= srcYmax
);
5819 ASSERT(*srcY1
>= srcYmin
);
5820 ASSERT(*srcY1
<= srcYmax
);