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 * Return the address of a specific pixel in an image (1D, 2D or 3D).
536 * Pixel unpacking/packing parameters are observed according to \p packing.
538 * \param dimensions either 1, 2 or 3 to indicate dimensionality of image
539 * \param image starting address of image data
540 * \param width the image width
541 * \param height theimage height
542 * \param format the pixel format
543 * \param type the pixel data type
544 * \param packing the pixelstore attributes
545 * \param img which image in the volume (0 for 1D or 2D images)
546 * \param row row of pixel in the image (0 for 1D images)
547 * \param column column of pixel in the image
549 * \return address of pixel on success, or NULL on error.
551 * \sa gl_pixelstore_attrib.
554 _mesa_image_address( GLuint dimensions,
555 const struct gl_pixelstore_attrib *packing,
557 GLsizei width, GLsizei height,
558 GLenum format, GLenum type,
559 GLint img, GLint row, GLint column )
561 GLint alignment; /* 1, 2 or 4 */
562 GLint pixels_per_row;
563 GLint rows_per_image;
566 GLint skipimages; /* for 3-D volume images */
569 ASSERT(dimensions >= 1 && dimensions <= 3);
571 alignment = packing->Alignment;
572 if (packing->RowLength > 0) {
573 pixels_per_row = packing->RowLength;
576 pixels_per_row = width;
578 if (packing->ImageHeight > 0) {
579 rows_per_image = packing->ImageHeight;
582 rows_per_image = height;
585 skippixels = packing->SkipPixels;
586 /* Note: SKIP_ROWS _is_ used for 1D images */
587 skiprows = packing->SkipRows;
588 /* Note: SKIP_IMAGES is only used for 3D images */
589 skipimages = (dimensions == 3) ? packing->SkipImages : 0;
591 if (type == GL_BITMAP) {
593 GLint comp_per_pixel; /* components per pixel */
594 GLint bytes_per_comp; /* bytes per component */
596 GLint bytes_per_image;
598 /* Compute bytes per component */
599 bytes_per_comp = _mesa_sizeof_packed_type( type );
600 if (bytes_per_comp < 0) {
604 /* Compute number of components per pixel */
605 comp_per_pixel = _mesa_components_in_format( format );
606 if (comp_per_pixel < 0) {
610 bytes_per_row = alignment
611 * CEILING( comp_per_pixel*pixels_per_row, 8*alignment );
613 bytes_per_image = bytes_per_row * rows_per_image;
615 pixel_addr = (GLubyte *) image
616 + (skipimages + img) * bytes_per_image
617 + (skiprows + row) * bytes_per_row
618 + (skippixels + column) / 8;
621 /* Non-BITMAP data */
622 GLint bytes_per_pixel, bytes_per_row, remainder, bytes_per_image;
625 bytes_per_pixel = _mesa_bytes_per_pixel( format, type );
627 /* The pixel type and format should have been error checked earlier */
628 assert(bytes_per_pixel > 0);
630 bytes_per_row = pixels_per_row * bytes_per_pixel;
631 remainder = bytes_per_row % alignment;
633 bytes_per_row += (alignment - remainder);
635 ASSERT(bytes_per_row % alignment == 0);
637 bytes_per_image = bytes_per_row * rows_per_image;
639 if (packing->Invert) {
640 /* set pixel_addr to the last row */
641 topOfImage = bytes_per_row * (height - 1);
642 bytes_per_row = -bytes_per_row;
648 /* compute final pixel address */
649 pixel_addr = (GLubyte *) image
650 + (skipimages + img) * bytes_per_image
652 + (skiprows + row) * bytes_per_row
653 + (skippixels + column) * bytes_per_pixel;
656 return (GLvoid *) pixel_addr;
661 _mesa_image_address1d( const struct gl_pixelstore_attrib *packing,
664 GLenum format, GLenum type,
667 return _mesa_image_address(1, packing, image, width, 1,
668 format, type, 0, 0, column);
673 _mesa_image_address2d( const struct gl_pixelstore_attrib *packing,
675 GLsizei width, GLsizei height,
676 GLenum format, GLenum type,
677 GLint row, GLint column )
679 return _mesa_image_address(2, packing, image, width, height,
680 format, type, 0, row, column);
685 _mesa_image_address3d( const struct gl_pixelstore_attrib *packing,
687 GLsizei width, GLsizei height,
688 GLenum format, GLenum type,
689 GLint img, GLint row, GLint column )
691 return _mesa_image_address(3, packing, image, width, height,
692 format, type, img, row, column);
698 * Compute the stride (in bytes) between image rows.
700 * \param packing the pixelstore attributes
701 * \param width image width.
702 * \param format pixel format.
703 * \param type pixel data type.
705 * \return the stride in bytes for the given parameters, or -1 if error
708 _mesa_image_row_stride( const struct gl_pixelstore_attrib *packing,
709 GLint width, GLenum format, GLenum type )
711 GLint bytesPerRow, remainder;
715 if (type == GL_BITMAP) {
716 if (packing->RowLength == 0) {
717 bytesPerRow = (width + 7) / 8;
720 bytesPerRow = (packing->RowLength + 7) / 8;
724 /* Non-BITMAP data */
725 const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
726 if (bytesPerPixel <= 0)
727 return -1; /* error */
728 if (packing->RowLength == 0) {
729 bytesPerRow = bytesPerPixel * width;
732 bytesPerRow = bytesPerPixel * packing->RowLength;
736 remainder = bytesPerRow % packing->Alignment;
738 bytesPerRow += (packing->Alignment - remainder);
741 if (packing->Invert) {
742 /* negate the bytes per row (negative row stride) */
743 bytesPerRow = -bytesPerRow;
753 * Compute the stride between images in a 3D texture (in bytes) for the given
754 * pixel packing parameters and image width, format and type.
757 _mesa_image_image_stride( const struct gl_pixelstore_attrib *packing,
758 GLint width, GLint height,
759 GLenum format, GLenum type )
761 GLint bytesPerRow, bytesPerImage, remainder;
765 if (type == GL_BITMAP) {
766 if (packing->RowLength == 0) {
767 bytesPerRow = (width + 7) / 8;
770 bytesPerRow = (packing->RowLength + 7) / 8;
774 const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
776 if (bytesPerPixel <= 0)
777 return -1; /* error */
778 if (packing->RowLength == 0) {
779 bytesPerRow = bytesPerPixel * width;
782 bytesPerRow = bytesPerPixel * packing->RowLength;
786 remainder = bytesPerRow % packing->Alignment;
788 bytesPerRow += (packing->Alignment - remainder);
790 if (packing->ImageHeight == 0)
791 bytesPerImage = bytesPerRow * height;
793 bytesPerImage = bytesPerRow * packing->ImageHeight;
795 return bytesPerImage;
800 * Unpack a 32x32 pixel polygon stipple from user memory using the
801 * current pixel unpack settings.
804 _mesa_unpack_polygon_stipple( const GLubyte *pattern, GLuint dest[32],
805 const struct gl_pixelstore_attrib *unpacking )
807 GLubyte *ptrn = (GLubyte *) _mesa_unpack_bitmap(32, 32, pattern, unpacking);
809 /* Convert pattern from GLubytes to GLuints and handle big/little
814 for (i = 0; i < 32; i++) {
815 dest[i] = (p[0] << 24)
827 * Pack polygon stipple into user memory given current pixel packing
831 _mesa_pack_polygon_stipple( const GLuint pattern[32], GLubyte *dest,
832 const struct gl_pixelstore_attrib *packing )
834 /* Convert pattern from GLuints to GLubytes to handle big/little
835 * endian differences.
839 for (i = 0; i < 32; i++) {
840 ptrn[i * 4 + 0] = (GLubyte) ((pattern[i] >> 24) & 0xff);
841 ptrn[i * 4 + 1] = (GLubyte) ((pattern[i] >> 16) & 0xff);
842 ptrn[i * 4 + 2] = (GLubyte) ((pattern[i] >> 8 ) & 0xff);
843 ptrn[i * 4 + 3] = (GLubyte) ((pattern[i] ) & 0xff);
846 _mesa_pack_bitmap(32, 32, ptrn, dest, packing);
851 * Unpack bitmap data. Resulting data will be in most-significant-bit-first
852 * order with row alignment = 1 byte.
855 _mesa_unpack_bitmap( GLint width, GLint height, const GLubyte *pixels,
856 const struct gl_pixelstore_attrib *packing )
858 GLint bytes, row, width_in_bytes;
859 GLubyte *buffer, *dst;
864 /* Alloc dest storage */
865 bytes = ((width + 7) / 8 * height);
866 buffer = (GLubyte *) _mesa_malloc( bytes );
870 width_in_bytes = CEILING( width, 8 );
872 for (row = 0; row < height; row++) {
873 const GLubyte *src = (const GLubyte *)
874 _mesa_image_address2d(packing, pixels, width, height,
875 GL_COLOR_INDEX, GL_BITMAP, row, 0);
881 if ((packing->SkipPixels & 7) == 0) {
882 _mesa_memcpy( dst, src, width_in_bytes );
883 if (packing->LsbFirst) {
884 flip_bytes( dst, width_in_bytes );
888 /* handling SkipPixels is a bit tricky (no pun intended!) */
890 if (packing->LsbFirst) {
891 GLubyte srcMask = 1 << (packing->SkipPixels & 0x7);
892 GLubyte dstMask = 128;
893 const GLubyte *s = src;
896 for (i = 0; i < width; i++) {
900 if (srcMask == 128) {
905 srcMask = srcMask << 1;
913 dstMask = dstMask >> 1;
918 GLubyte srcMask = 128 >> (packing->SkipPixels & 0x7);
919 GLubyte dstMask = 128;
920 const GLubyte *s = src;
923 for (i = 0; i < width; i++) {
932 srcMask = srcMask >> 1;
940 dstMask = dstMask >> 1;
945 dst += width_in_bytes;
956 _mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source,
957 GLubyte *dest, const struct gl_pixelstore_attrib *packing )
959 GLint row, width_in_bytes;
965 width_in_bytes = CEILING( width, 8 );
967 for (row = 0; row < height; row++) {
968 GLubyte *dst = (GLubyte *) _mesa_image_address2d(packing, dest,
969 width, height, GL_COLOR_INDEX, GL_BITMAP, row, 0);
973 if ((packing->SkipPixels & 7) == 0) {
974 _mesa_memcpy( dst, src, width_in_bytes );
975 if (packing->LsbFirst) {
976 flip_bytes( dst, width_in_bytes );
980 /* handling SkipPixels is a bit tricky (no pun intended!) */
982 if (packing->LsbFirst) {
983 GLubyte srcMask = 128;
984 GLubyte dstMask = 1 << (packing->SkipPixels & 0x7);
985 const GLubyte *s = src;
988 for (i = 0; i < width; i++) {
997 srcMask = srcMask >> 1;
999 if (dstMask == 128) {
1005 dstMask = dstMask << 1;
1010 GLubyte srcMask = 128;
1011 GLubyte dstMask = 128 >> (packing->SkipPixels & 0x7);
1012 const GLubyte *s = src;
1015 for (i = 0; i < width; i++) {
1024 srcMask = srcMask >> 1;
1032 dstMask = dstMask >> 1;
1037 src += width_in_bytes;
1042 /**********************************************************************/
1043 /***** Pixel processing functions ******/
1044 /**********************************************************************/
1047 * Apply scale and bias factors to an array of RGBA pixels.
1050 _mesa_scale_and_bias_rgba(GLuint n, GLfloat rgba[][4],
1051 GLfloat rScale, GLfloat gScale,
1052 GLfloat bScale, GLfloat aScale,
1053 GLfloat rBias, GLfloat gBias,
1054 GLfloat bBias, GLfloat aBias)
1056 if (rScale != 1.0 || rBias != 0.0) {
1058 for (i = 0; i < n; i++) {
1059 rgba[i][RCOMP] = rgba[i][RCOMP] * rScale + rBias;
1062 if (gScale != 1.0 || gBias != 0.0) {
1064 for (i = 0; i < n; i++) {
1065 rgba[i][GCOMP] = rgba[i][GCOMP] * gScale + gBias;
1068 if (bScale != 1.0 || bBias != 0.0) {
1070 for (i = 0; i < n; i++) {
1071 rgba[i][BCOMP] = rgba[i][BCOMP] * bScale + bBias;
1074 if (aScale != 1.0 || aBias != 0.0) {
1076 for (i = 0; i < n; i++) {
1077 rgba[i][ACOMP] = rgba[i][ACOMP] * aScale + aBias;
1084 * Apply pixel mapping to an array of floating point RGBA pixels.
1087 _mesa_map_rgba( const GLcontext *ctx, GLuint n, GLfloat rgba[][4] )
1089 const GLfloat rscale = (GLfloat) (ctx->PixelMaps.RtoR.Size - 1);
1090 const GLfloat gscale = (GLfloat) (ctx->PixelMaps.GtoG.Size - 1);
1091 const GLfloat bscale = (GLfloat) (ctx->PixelMaps.BtoB.Size - 1);
1092 const GLfloat ascale = (GLfloat) (ctx->PixelMaps.AtoA.Size - 1);
1093 const GLfloat *rMap = ctx->PixelMaps.RtoR.Map;
1094 const GLfloat *gMap = ctx->PixelMaps.GtoG.Map;
1095 const GLfloat *bMap = ctx->PixelMaps.BtoB.Map;
1096 const GLfloat *aMap = ctx->PixelMaps.AtoA.Map;
1099 GLfloat r = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
1100 GLfloat g = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
1101 GLfloat b = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
1102 GLfloat a = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
1103 rgba[i][RCOMP] = rMap[IROUND(r * rscale)];
1104 rgba[i][GCOMP] = gMap[IROUND(g * gscale)];
1105 rgba[i][BCOMP] = bMap[IROUND(b * bscale)];
1106 rgba[i][ACOMP] = aMap[IROUND(a * ascale)];
1112 * Apply the color matrix and post color matrix scaling and biasing.
1115 _mesa_transform_rgba(const GLcontext *ctx, GLuint n, GLfloat rgba[][4])
1117 const GLfloat rs = ctx->Pixel.PostColorMatrixScale[0];
1118 const GLfloat rb = ctx->Pixel.PostColorMatrixBias[0];
1119 const GLfloat gs = ctx->Pixel.PostColorMatrixScale[1];
1120 const GLfloat gb = ctx->Pixel.PostColorMatrixBias[1];
1121 const GLfloat bs = ctx->Pixel.PostColorMatrixScale[2];
1122 const GLfloat bb = ctx->Pixel.PostColorMatrixBias[2];
1123 const GLfloat as = ctx->Pixel.PostColorMatrixScale[3];
1124 const GLfloat ab = ctx->Pixel.PostColorMatrixBias[3];
1125 const GLfloat *m = ctx->ColorMatrixStack.Top->m;
1127 for (i = 0; i < n; i++) {
1128 const GLfloat r = rgba[i][RCOMP];
1129 const GLfloat g = rgba[i][GCOMP];
1130 const GLfloat b = rgba[i][BCOMP];
1131 const GLfloat a = rgba[i][ACOMP];
1132 rgba[i][RCOMP] = (m[0] * r + m[4] * g + m[ 8] * b + m[12] * a) * rs + rb;
1133 rgba[i][GCOMP] = (m[1] * r + m[5] * g + m[ 9] * b + m[13] * a) * gs + gb;
1134 rgba[i][BCOMP] = (m[2] * r + m[6] * g + m[10] * b + m[14] * a) * bs + bb;
1135 rgba[i][ACOMP] = (m[3] * r + m[7] * g + m[11] * b + m[15] * a) * as + ab;
1141 * Apply a color table lookup to an array of floating point RGBA colors.
1144 _mesa_lookup_rgba_float(const struct gl_color_table *table,
1145 GLuint n, GLfloat rgba[][4])
1147 const GLint max = table->Size - 1;
1148 const GLfloat scale = (GLfloat) max;
1149 const GLfloat *lut = table->TableF;
1152 if (!table->TableF || table->Size == 0)
1155 switch (table->_BaseFormat) {
1157 /* replace RGBA with I */
1158 for (i = 0; i < n; i++) {
1159 GLint j = IROUND(rgba[i][RCOMP] * scale);
1160 GLfloat c = lut[CLAMP(j, 0, max)];
1168 /* replace RGB with L */
1169 for (i = 0; i < n; i++) {
1170 GLint j = IROUND(rgba[i][RCOMP] * scale);
1171 GLfloat c = lut[CLAMP(j, 0, max)];
1178 /* replace A with A */
1179 for (i = 0; i < n; i++) {
1180 GLint j = IROUND(rgba[i][ACOMP] * scale);
1181 rgba[i][ACOMP] = lut[CLAMP(j, 0, max)];
1184 case GL_LUMINANCE_ALPHA:
1185 /* replace RGBA with LLLA */
1186 for (i = 0; i < n; i++) {
1187 GLint jL = IROUND(rgba[i][RCOMP] * scale);
1188 GLint jA = IROUND(rgba[i][ACOMP] * scale);
1189 GLfloat luminance, alpha;
1190 jL = CLAMP(jL, 0, max);
1191 jA = CLAMP(jA, 0, max);
1192 luminance = lut[jL * 2 + 0];
1193 alpha = lut[jA * 2 + 1];
1196 rgba[i][BCOMP] = luminance;
1197 rgba[i][ACOMP] = alpha;;
1201 /* replace RGB with RGB */
1202 for (i = 0; i < n; i++) {
1203 GLint jR = IROUND(rgba[i][RCOMP] * scale);
1204 GLint jG = IROUND(rgba[i][GCOMP] * scale);
1205 GLint jB = IROUND(rgba[i][BCOMP] * scale);
1206 jR = CLAMP(jR, 0, max);
1207 jG = CLAMP(jG, 0, max);
1208 jB = CLAMP(jB, 0, max);
1209 rgba[i][RCOMP] = lut[jR * 3 + 0];
1210 rgba[i][GCOMP] = lut[jG * 3 + 1];
1211 rgba[i][BCOMP] = lut[jB * 3 + 2];
1215 /* replace RGBA with RGBA */
1216 for (i = 0; i < n; i++) {
1217 GLint jR = IROUND(rgba[i][RCOMP] * scale);
1218 GLint jG = IROUND(rgba[i][GCOMP] * scale);
1219 GLint jB = IROUND(rgba[i][BCOMP] * scale);
1220 GLint jA = IROUND(rgba[i][ACOMP] * scale);
1221 jR = CLAMP(jR, 0, max);
1222 jG = CLAMP(jG, 0, max);
1223 jB = CLAMP(jB, 0, max);
1224 jA = CLAMP(jA, 0, max);
1225 rgba[i][RCOMP] = lut[jR * 4 + 0];
1226 rgba[i][GCOMP] = lut[jG * 4 + 1];
1227 rgba[i][BCOMP] = lut[jB * 4 + 2];
1228 rgba[i][ACOMP] = lut[jA * 4 + 3];
1232 _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_float");
1240 * Apply a color table lookup to an array of ubyte/RGBA colors.
1243 _mesa_lookup_rgba_ubyte(const struct gl_color_table *table,
1244 GLuint n, GLubyte rgba[][4])
1246 const GLubyte *lut = table->TableUB;
1247 const GLfloat scale = (GLfloat) (table->Size - 1) / (GLfloat)255.0;
1250 if (!table->TableUB || table->Size == 0)
1253 switch (table->_BaseFormat) {
1255 /* replace RGBA with I */
1256 if (table->Size == 256) {
1257 for (i = 0; i < n; i++) {
1258 const GLubyte c = lut[rgba[i][RCOMP]];
1266 for (i = 0; i < n; i++) {
1267 GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
1271 rgba[i][ACOMP] = lut[j];
1276 /* replace RGB with L */
1277 if (table->Size == 256) {
1278 for (i = 0; i < n; i++) {
1279 const GLubyte c = lut[rgba[i][RCOMP]];
1286 for (i = 0; i < n; i++) {
1287 GLint j = IROUND((GLfloat) rgba[i][RCOMP] * scale);
1290 rgba[i][BCOMP] = lut[j];
1295 /* replace A with A */
1296 if (table->Size == 256) {
1297 for (i = 0; i < n; i++) {
1298 rgba[i][ACOMP] = lut[rgba[i][ACOMP]];
1302 for (i = 0; i < n; i++) {
1303 GLint j = IROUND((GLfloat) rgba[i][ACOMP] * scale);
1304 rgba[i][ACOMP] = lut[j];
1308 case GL_LUMINANCE_ALPHA:
1309 /* replace RGBA with LLLA */
1310 if (table->Size == 256) {
1311 for (i = 0; i < n; i++) {
1312 GLubyte l = lut[rgba[i][RCOMP] * 2 + 0];
1313 GLubyte a = lut[rgba[i][ACOMP] * 2 + 1];;
1321 for (i = 0; i < n; i++) {
1322 GLint jL = IROUND((GLfloat) rgba[i][RCOMP] * scale);
1323 GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
1324 GLubyte luminance = lut[jL * 2 + 0];
1325 GLubyte alpha = lut[jA * 2 + 1];
1328 rgba[i][BCOMP] = luminance;
1329 rgba[i][ACOMP] = alpha;
1334 if (table->Size == 256) {
1335 for (i = 0; i < n; i++) {
1336 rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 3 + 0];
1337 rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 3 + 1];
1338 rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 3 + 2];
1342 for (i = 0; i < n; i++) {
1343 GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
1344 GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
1345 GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
1346 rgba[i][RCOMP] = lut[jR * 3 + 0];
1347 rgba[i][GCOMP] = lut[jG * 3 + 1];
1348 rgba[i][BCOMP] = lut[jB * 3 + 2];
1353 if (table->Size == 256) {
1354 for (i = 0; i < n; i++) {
1355 rgba[i][RCOMP] = lut[rgba[i][RCOMP] * 4 + 0];
1356 rgba[i][GCOMP] = lut[rgba[i][GCOMP] * 4 + 1];
1357 rgba[i][BCOMP] = lut[rgba[i][BCOMP] * 4 + 2];
1358 rgba[i][ACOMP] = lut[rgba[i][ACOMP] * 4 + 3];
1362 for (i = 0; i < n; i++) {
1363 GLint jR = IROUND((GLfloat) rgba[i][RCOMP] * scale);
1364 GLint jG = IROUND((GLfloat) rgba[i][GCOMP] * scale);
1365 GLint jB = IROUND((GLfloat) rgba[i][BCOMP] * scale);
1366 GLint jA = IROUND((GLfloat) rgba[i][ACOMP] * scale);
1367 CLAMPED_FLOAT_TO_CHAN(rgba[i][RCOMP], lut[jR * 4 + 0]);
1368 CLAMPED_FLOAT_TO_CHAN(rgba[i][GCOMP], lut[jG * 4 + 1]);
1369 CLAMPED_FLOAT_TO_CHAN(rgba[i][BCOMP], lut[jB * 4 + 2]);
1370 CLAMPED_FLOAT_TO_CHAN(rgba[i][ACOMP], lut[jA * 4 + 3]);
1375 _mesa_problem(NULL, "Bad format in _mesa_lookup_rgba_chan");
1383 * Map color indexes to float rgba values.
1386 _mesa_map_ci_to_rgba( const GLcontext *ctx, GLuint n,
1387 const GLuint index[], GLfloat rgba[][4] )
1389 GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;
1390 GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;
1391 GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;
1392 GLuint amask = ctx->PixelMaps.ItoA.Size - 1;
1393 const GLfloat *rMap = ctx->PixelMaps.ItoR.Map;
1394 const GLfloat *gMap = ctx->PixelMaps.ItoG.Map;
1395 const GLfloat *bMap = ctx->PixelMaps.ItoB.Map;
1396 const GLfloat *aMap = ctx->PixelMaps.ItoA.Map;
1399 rgba[i][RCOMP] = rMap[index[i] & rmask];
1400 rgba[i][GCOMP] = gMap[index[i] & gmask];
1401 rgba[i][BCOMP] = bMap[index[i] & bmask];
1402 rgba[i][ACOMP] = aMap[index[i] & amask];
1408 * Map ubyte color indexes to ubyte/RGBA values.
1411 _mesa_map_ci8_to_rgba8(const GLcontext *ctx, GLuint n, const GLubyte index[],
1414 GLuint rmask = ctx->PixelMaps.ItoR.Size - 1;
1415 GLuint gmask = ctx->PixelMaps.ItoG.Size - 1;
1416 GLuint bmask = ctx->PixelMaps.ItoB.Size - 1;
1417 GLuint amask = ctx->PixelMaps.ItoA.Size - 1;
1418 const GLubyte *rMap = ctx->PixelMaps.ItoR.Map8;
1419 const GLubyte *gMap = ctx->PixelMaps.ItoG.Map8;
1420 const GLubyte *bMap = ctx->PixelMaps.ItoB.Map8;
1421 const GLubyte *aMap = ctx->PixelMaps.ItoA.Map8;
1424 rgba[i][RCOMP] = rMap[index[i] & rmask];
1425 rgba[i][GCOMP] = gMap[index[i] & gmask];
1426 rgba[i][BCOMP] = bMap[index[i] & bmask];
1427 rgba[i][ACOMP] = aMap[index[i] & amask];
1433 _mesa_scale_and_bias_depth(const GLcontext *ctx, GLuint n,
1434 GLfloat depthValues[])
1436 const GLfloat scale = ctx->Pixel.DepthScale;
1437 const GLfloat bias = ctx->Pixel.DepthBias;
1439 for (i = 0; i < n; i++) {
1440 GLfloat d = depthValues[i] * scale + bias;
1441 depthValues[i] = CLAMP(d, 0.0F, 1.0F);
1447 _mesa_scale_and_bias_depth_uint(const GLcontext *ctx, GLuint n,
1448 GLuint depthValues[])
1450 const GLdouble max = (double) 0xffffffff;
1451 const GLdouble scale = ctx->Pixel.DepthScale;
1452 const GLdouble bias = ctx->Pixel.DepthBias * max;
1454 for (i = 0; i < n; i++) {
1455 GLdouble d = (GLdouble) depthValues[i] * scale + bias;
1456 d = CLAMP(d, 0.0, max);
1457 depthValues[i] = (GLuint) d;
1464 * Update the min/max values from an array of fragment colors.
1467 update_minmax(GLcontext *ctx, GLuint n, const GLfloat rgba[][4])
1470 for (i = 0; i < n; i++) {
1472 if (rgba[i][RCOMP] < ctx->MinMax.Min[RCOMP])
1473 ctx->MinMax.Min[RCOMP] = rgba[i][RCOMP];
1474 if (rgba[i][GCOMP] < ctx->MinMax.Min[GCOMP])
1475 ctx->MinMax.Min[GCOMP] = rgba[i][GCOMP];
1476 if (rgba[i][BCOMP] < ctx->MinMax.Min[BCOMP])
1477 ctx->MinMax.Min[BCOMP] = rgba[i][BCOMP];
1478 if (rgba[i][ACOMP] < ctx->MinMax.Min[ACOMP])
1479 ctx->MinMax.Min[ACOMP] = rgba[i][ACOMP];
1482 if (rgba[i][RCOMP] > ctx->MinMax.Max[RCOMP])
1483 ctx->MinMax.Max[RCOMP] = rgba[i][RCOMP];
1484 if (rgba[i][GCOMP] > ctx->MinMax.Max[GCOMP])
1485 ctx->MinMax.Max[GCOMP] = rgba[i][GCOMP];
1486 if (rgba[i][BCOMP] > ctx->MinMax.Max[BCOMP])
1487 ctx->MinMax.Max[BCOMP] = rgba[i][BCOMP];
1488 if (rgba[i][ACOMP] > ctx->MinMax.Max[ACOMP])
1489 ctx->MinMax.Max[ACOMP] = rgba[i][ACOMP];
1495 * Update the histogram values from an array of fragment colors.
1498 update_histogram(GLcontext *ctx, GLuint n, const GLfloat rgba[][4])
1500 const GLint max = ctx->Histogram.Width - 1;
1501 GLfloat w = (GLfloat) max;
1504 if (ctx->Histogram.Width == 0)
1507 for (i = 0; i < n; i++) {
1508 GLint ri = IROUND(rgba[i][RCOMP] * w);
1509 GLint gi = IROUND(rgba[i][GCOMP] * w);
1510 GLint bi = IROUND(rgba[i][BCOMP] * w);
1511 GLint ai = IROUND(rgba[i][ACOMP] * w);
1512 ri = CLAMP(ri, 0, max);
1513 gi = CLAMP(gi, 0, max);
1514 bi = CLAMP(bi, 0, max);
1515 ai = CLAMP(ai, 0, max);
1516 ctx->Histogram.Count[ri][RCOMP]++;
1517 ctx->Histogram.Count[gi][GCOMP]++;
1518 ctx->Histogram.Count[bi][BCOMP]++;
1519 ctx->Histogram.Count[ai][ACOMP]++;
1525 * Apply various pixel transfer operations to an array of RGBA pixels
1526 * as indicated by the transferOps bitmask
1529 _mesa_apply_rgba_transfer_ops(GLcontext *ctx, GLbitfield transferOps,
1530 GLuint n, GLfloat rgba[][4])
1533 if (transferOps & IMAGE_SCALE_BIAS_BIT) {
1534 _mesa_scale_and_bias_rgba(n, rgba,
1535 ctx->Pixel.RedScale, ctx->Pixel.GreenScale,
1536 ctx->Pixel.BlueScale, ctx->Pixel.AlphaScale,
1537 ctx->Pixel.RedBias, ctx->Pixel.GreenBias,
1538 ctx->Pixel.BlueBias, ctx->Pixel.AlphaBias);
1540 /* color map lookup */
1541 if (transferOps & IMAGE_MAP_COLOR_BIT) {
1542 _mesa_map_rgba( ctx, n, rgba );
1544 /* GL_COLOR_TABLE lookup */
1545 if (transferOps & IMAGE_COLOR_TABLE_BIT) {
1546 _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_PRECONVOLUTION], n, rgba);
1549 if (transferOps & IMAGE_CONVOLUTION_BIT) {
1550 /* this has to be done in the calling code */
1551 _mesa_problem(ctx, "IMAGE_CONVOLUTION_BIT set in _mesa_apply_transfer_ops");
1553 /* GL_POST_CONVOLUTION_RED/GREEN/BLUE/ALPHA_SCALE/BIAS */
1554 if (transferOps & IMAGE_POST_CONVOLUTION_SCALE_BIAS) {
1555 _mesa_scale_and_bias_rgba(n, rgba,
1556 ctx->Pixel.PostConvolutionScale[RCOMP],
1557 ctx->Pixel.PostConvolutionScale[GCOMP],
1558 ctx->Pixel.PostConvolutionScale[BCOMP],
1559 ctx->Pixel.PostConvolutionScale[ACOMP],
1560 ctx->Pixel.PostConvolutionBias[RCOMP],
1561 ctx->Pixel.PostConvolutionBias[GCOMP],
1562 ctx->Pixel.PostConvolutionBias[BCOMP],
1563 ctx->Pixel.PostConvolutionBias[ACOMP]);
1565 /* GL_POST_CONVOLUTION_COLOR_TABLE lookup */
1566 if (transferOps & IMAGE_POST_CONVOLUTION_COLOR_TABLE_BIT) {
1567 _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCONVOLUTION], n, rgba);
1569 /* color matrix transform */
1570 if (transferOps & IMAGE_COLOR_MATRIX_BIT) {
1571 _mesa_transform_rgba(ctx, n, rgba);
1573 /* GL_POST_COLOR_MATRIX_COLOR_TABLE lookup */
1574 if (transferOps & IMAGE_POST_COLOR_MATRIX_COLOR_TABLE_BIT) {
1575 _mesa_lookup_rgba_float(&ctx->ColorTable[COLORTABLE_POSTCOLORMATRIX], n, rgba);
1577 /* update histogram count */
1578 if (transferOps & IMAGE_HISTOGRAM_BIT) {
1579 update_histogram(ctx, n, (CONST GLfloat (*)[4]) rgba);
1581 /* update min/max values */
1582 if (transferOps & IMAGE_MIN_MAX_BIT) {
1583 update_minmax(ctx, n, (CONST GLfloat (*)[4]) rgba);
1585 /* clamping to [0,1] */
1586 if (transferOps & IMAGE_CLAMP_BIT) {
1588 for (i = 0; i < n; i++) {
1589 rgba[i][RCOMP] = CLAMP(rgba[i][RCOMP], 0.0F, 1.0F);
1590 rgba[i][GCOMP] = CLAMP(rgba[i][GCOMP], 0.0F, 1.0F);
1591 rgba[i][BCOMP] = CLAMP(rgba[i][BCOMP], 0.0F, 1.0F);
1592 rgba[i][ACOMP] = CLAMP(rgba[i][ACOMP], 0.0F, 1.0F);
1599 * Apply color index shift and offset to an array of pixels.
1602 shift_and_offset_ci( const GLcontext *ctx, GLuint n, GLuint indexes[] )
1604 GLint shift = ctx->Pixel.IndexShift;
1605 GLint offset = ctx->Pixel.IndexOffset;
1609 indexes[i] = (indexes[i] << shift) + offset;
1612 else if (shift < 0) {
1615 indexes[i] = (indexes[i] >> shift) + offset;
1620 indexes[i] = indexes[i] + offset;
1628 * Apply color index shift, offset and table lookup to an array
1632 _mesa_apply_ci_transfer_ops(const GLcontext *ctx, GLbitfield transferOps,
1633 GLuint n, GLuint indexes[])
1635 if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
1636 shift_and_offset_ci(ctx, n, indexes);
1638 if (transferOps & IMAGE_MAP_COLOR_BIT) {
1639 const GLuint mask = ctx->PixelMaps.ItoI.Size - 1;
1641 for (i = 0; i < n; i++) {
1642 const GLuint j = indexes[i] & mask;
1643 indexes[i] = IROUND(ctx->PixelMaps.ItoI.Map[j]);
1650 * Apply stencil index shift, offset and table lookup to an array
1651 * of stencil values.
1654 _mesa_apply_stencil_transfer_ops(const GLcontext *ctx, GLuint n,
1655 GLstencil stencil[])
1657 if (ctx->Pixel.IndexShift != 0 || ctx->Pixel.IndexOffset != 0) {
1658 const GLint offset = ctx->Pixel.IndexOffset;
1659 GLint shift = ctx->Pixel.IndexShift;
1662 for (i = 0; i < n; i++) {
1663 stencil[i] = (stencil[i] << shift) + offset;
1666 else if (shift < 0) {
1668 for (i = 0; i < n; i++) {
1669 stencil[i] = (stencil[i] >> shift) + offset;
1673 for (i = 0; i < n; i++) {
1674 stencil[i] = stencil[i] + offset;
1678 if (ctx->Pixel.MapStencilFlag) {
1679 GLuint mask = ctx->PixelMaps.StoS.Size - 1;
1681 for (i = 0; i < n; i++) {
1682 stencil[i] = (GLstencil)ctx->PixelMaps.StoS.Map[ stencil[i] & mask ];
1689 * Used to pack an array [][4] of RGBA float colors as specified
1690 * by the dstFormat, dstType and dstPacking. Used by glReadPixels,
1691 * glGetConvolutionFilter(), etc.
1692 * Note: the rgba values will be modified by this function when any pixel
1693 * transfer ops are enabled.
1696 _mesa_pack_rgba_span_float(GLcontext *ctx, GLuint n, GLfloat rgba[][4],
1697 GLenum dstFormat, GLenum dstType,
1699 const struct gl_pixelstore_attrib *dstPacking,
1700 GLbitfield transferOps)
1702 GLfloat luminance[MAX_WIDTH];
1703 const GLint comps = _mesa_components_in_format(dstFormat);
1707 * This test should probably go away. Have the caller set/clear the
1708 * IMAGE_CLAMP_BIT as needed.
1710 if (dstType != GL_FLOAT || ctx->Color.ClampReadColor == GL_TRUE) {
1711 /* need to clamp to [0, 1] */
1712 transferOps |= IMAGE_CLAMP_BIT;
1716 _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
1717 if ((transferOps & IMAGE_MIN_MAX_BIT) && ctx->MinMax.Sink) {
1722 if (dstFormat == GL_LUMINANCE || dstFormat == GL_LUMINANCE_ALPHA) {
1723 /* compute luminance values */
1724 if (transferOps & IMAGE_CLAMP_BIT) {
1725 for (i = 0; i < n; i++) {
1726 GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
1727 luminance[i] = CLAMP(sum, 0.0F, 1.0F);
1731 for (i = 0; i < n; i++) {
1732 luminance[i] = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
1738 * Pack/store the pixels. Ugh! Lots of cases!!!
1741 case GL_UNSIGNED_BYTE:
1743 GLubyte *dst = (GLubyte *) dstAddr;
1744 switch (dstFormat) {
1747 dst[i] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
1751 dst[i] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
1755 dst[i] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
1759 dst[i] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
1763 dst[i] = FLOAT_TO_UBYTE(luminance[i]);
1765 case GL_LUMINANCE_ALPHA:
1767 dst[i*2+0] = FLOAT_TO_UBYTE(luminance[i]);
1768 dst[i*2+1] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
1773 dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
1774 dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
1775 dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
1780 dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
1781 dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
1782 dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
1783 dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
1788 dst[i*3+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
1789 dst[i*3+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
1790 dst[i*3+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
1795 dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
1796 dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
1797 dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
1798 dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
1803 dst[i*4+0] = FLOAT_TO_UBYTE(rgba[i][ACOMP]);
1804 dst[i*4+1] = FLOAT_TO_UBYTE(rgba[i][BCOMP]);
1805 dst[i*4+2] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
1806 dst[i*4+3] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
1812 dst[i*2+0] = FLOAT_TO_UBYTE(rgba[i][RCOMP]);
1813 dst[i*2+1] = FLOAT_TO_UBYTE(rgba[i][GCOMP]);
1817 _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
1823 GLbyte *dst = (GLbyte *) dstAddr;
1824 switch (dstFormat) {
1827 dst[i] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
1831 dst[i] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
1835 dst[i] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
1839 dst[i] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
1843 dst[i] = FLOAT_TO_BYTE(luminance[i]);
1845 case GL_LUMINANCE_ALPHA:
1847 dst[i*2+0] = FLOAT_TO_BYTE(luminance[i]);
1848 dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
1853 dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
1854 dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
1855 dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
1860 dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
1861 dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
1862 dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
1863 dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
1868 dst[i*3+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
1869 dst[i*3+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
1870 dst[i*3+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
1875 dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
1876 dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
1877 dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
1878 dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
1883 dst[i*4+0] = FLOAT_TO_BYTE(rgba[i][ACOMP]);
1884 dst[i*4+1] = FLOAT_TO_BYTE(rgba[i][BCOMP]);
1885 dst[i*4+2] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
1886 dst[i*4+3] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
1892 dst[i*2+0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
1893 dst[i*2+1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
1897 _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
1901 case GL_UNSIGNED_SHORT:
1903 GLushort *dst = (GLushort *) dstAddr;
1904 switch (dstFormat) {
1907 CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][RCOMP]);
1911 CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][GCOMP]);
1915 CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][BCOMP]);
1919 CLAMPED_FLOAT_TO_USHORT(dst[i], rgba[i][ACOMP]);
1923 UNCLAMPED_FLOAT_TO_USHORT(dst[i], luminance[i]);
1925 case GL_LUMINANCE_ALPHA:
1927 UNCLAMPED_FLOAT_TO_USHORT(dst[i*2+0], luminance[i]);
1928 CLAMPED_FLOAT_TO_USHORT(dst[i*2+1], rgba[i][ACOMP]);
1933 CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][RCOMP]);
1934 CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
1935 CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][BCOMP]);
1940 CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][RCOMP]);
1941 CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
1942 CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][BCOMP]);
1943 CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
1948 CLAMPED_FLOAT_TO_USHORT(dst[i*3+0], rgba[i][BCOMP]);
1949 CLAMPED_FLOAT_TO_USHORT(dst[i*3+1], rgba[i][GCOMP]);
1950 CLAMPED_FLOAT_TO_USHORT(dst[i*3+2], rgba[i][RCOMP]);
1955 CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][BCOMP]);
1956 CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][GCOMP]);
1957 CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][RCOMP]);
1958 CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][ACOMP]);
1963 CLAMPED_FLOAT_TO_USHORT(dst[i*4+0], rgba[i][ACOMP]);
1964 CLAMPED_FLOAT_TO_USHORT(dst[i*4+1], rgba[i][BCOMP]);
1965 CLAMPED_FLOAT_TO_USHORT(dst[i*4+2], rgba[i][GCOMP]);
1966 CLAMPED_FLOAT_TO_USHORT(dst[i*4+3], rgba[i][RCOMP]);
1972 dst[i*2+0] = FLOAT_TO_USHORT(rgba[i][RCOMP]);
1973 dst[i*2+1] = FLOAT_TO_USHORT(rgba[i][GCOMP]);
1977 _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
1983 GLshort *dst = (GLshort *) dstAddr;
1984 switch (dstFormat) {
1987 dst[i] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
1991 dst[i] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
1995 dst[i] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
1999 dst[i] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
2003 dst[i] = FLOAT_TO_SHORT(luminance[i]);
2005 case GL_LUMINANCE_ALPHA:
2007 dst[i*2+0] = FLOAT_TO_SHORT(luminance[i]);
2008 dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
2013 dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
2014 dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
2015 dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
2020 dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
2021 dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
2022 dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
2023 dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
2028 dst[i*3+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
2029 dst[i*3+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
2030 dst[i*3+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
2035 dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
2036 dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
2037 dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
2038 dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
2043 dst[i*4+0] = FLOAT_TO_SHORT(rgba[i][ACOMP]);
2044 dst[i*4+1] = FLOAT_TO_SHORT(rgba[i][BCOMP]);
2045 dst[i*4+2] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
2046 dst[i*4+3] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
2052 dst[i*2+0] = FLOAT_TO_SHORT(rgba[i][RCOMP]);
2053 dst[i*2+1] = FLOAT_TO_SHORT(rgba[i][GCOMP]);
2057 _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
2061 case GL_UNSIGNED_INT:
2063 GLuint *dst = (GLuint *) dstAddr;
2064 switch (dstFormat) {
2067 dst[i] = FLOAT_TO_UINT(rgba[i][RCOMP]);
2071 dst[i] = FLOAT_TO_UINT(rgba[i][GCOMP]);
2075 dst[i] = FLOAT_TO_UINT(rgba[i][BCOMP]);
2079 dst[i] = FLOAT_TO_UINT(rgba[i][ACOMP]);
2083 dst[i] = FLOAT_TO_UINT(luminance[i]);
2085 case GL_LUMINANCE_ALPHA:
2087 dst[i*2+0] = FLOAT_TO_UINT(luminance[i]);
2088 dst[i*2+1] = FLOAT_TO_UINT(rgba[i][ACOMP]);
2093 dst[i*3+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
2094 dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
2095 dst[i*3+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
2100 dst[i*4+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
2101 dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
2102 dst[i*4+2] = FLOAT_TO_UINT(rgba[i][BCOMP]);
2103 dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
2108 dst[i*3+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
2109 dst[i*3+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
2110 dst[i*3+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
2115 dst[i*4+0] = FLOAT_TO_UINT(rgba[i][BCOMP]);
2116 dst[i*4+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
2117 dst[i*4+2] = FLOAT_TO_UINT(rgba[i][RCOMP]);
2118 dst[i*4+3] = FLOAT_TO_UINT(rgba[i][ACOMP]);
2123 dst[i*4+0] = FLOAT_TO_UINT(rgba[i][ACOMP]);
2124 dst[i*4+1] = FLOAT_TO_UINT(rgba[i][BCOMP]);
2125 dst[i*4+2] = FLOAT_TO_UINT(rgba[i][GCOMP]);
2126 dst[i*4+3] = FLOAT_TO_UINT(rgba[i][RCOMP]);
2132 dst[i*2+0] = FLOAT_TO_UINT(rgba[i][RCOMP]);
2133 dst[i*2+1] = FLOAT_TO_UINT(rgba[i][GCOMP]);
2137 _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
2143 GLint *dst = (GLint *) dstAddr;
2144 switch (dstFormat) {
2147 dst[i] = FLOAT_TO_INT(rgba[i][RCOMP]);
2151 dst[i] = FLOAT_TO_INT(rgba[i][GCOMP]);
2155 dst[i] = FLOAT_TO_INT(rgba[i][BCOMP]);
2159 dst[i] = FLOAT_TO_INT(rgba[i][ACOMP]);
2163 dst[i] = FLOAT_TO_INT(luminance[i]);
2165 case GL_LUMINANCE_ALPHA:
2167 dst[i*2+0] = FLOAT_TO_INT(luminance[i]);
2168 dst[i*2+1] = FLOAT_TO_INT(rgba[i][ACOMP]);
2173 dst[i*3+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
2174 dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
2175 dst[i*3+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
2180 dst[i*4+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
2181 dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
2182 dst[i*4+2] = FLOAT_TO_INT(rgba[i][BCOMP]);
2183 dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
2188 dst[i*3+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
2189 dst[i*3+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
2190 dst[i*3+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
2195 dst[i*4+0] = FLOAT_TO_INT(rgba[i][BCOMP]);
2196 dst[i*4+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
2197 dst[i*4+2] = FLOAT_TO_INT(rgba[i][RCOMP]);
2198 dst[i*4+3] = FLOAT_TO_INT(rgba[i][ACOMP]);
2203 dst[i*4+0] = FLOAT_TO_INT(rgba[i][ACOMP]);
2204 dst[i*4+1] = FLOAT_TO_INT(rgba[i][BCOMP]);
2205 dst[i*4+2] = FLOAT_TO_INT(rgba[i][GCOMP]);
2206 dst[i*4+3] = FLOAT_TO_INT(rgba[i][RCOMP]);
2212 dst[i*2+0] = FLOAT_TO_INT(rgba[i][RCOMP]);
2213 dst[i*2+1] = FLOAT_TO_INT(rgba[i][GCOMP]);
2217 _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
2223 GLfloat *dst = (GLfloat *) dstAddr;
2224 switch (dstFormat) {
2227 dst[i] = rgba[i][RCOMP];
2231 dst[i] = rgba[i][GCOMP];
2235 dst[i] = rgba[i][BCOMP];
2239 dst[i] = rgba[i][ACOMP];
2243 dst[i] = luminance[i];
2245 case GL_LUMINANCE_ALPHA:
2247 dst[i*2+0] = luminance[i];
2248 dst[i*2+1] = rgba[i][ACOMP];
2253 dst[i*3+0] = rgba[i][RCOMP];
2254 dst[i*3+1] = rgba[i][GCOMP];
2255 dst[i*3+2] = rgba[i][BCOMP];
2260 dst[i*4+0] = rgba[i][RCOMP];
2261 dst[i*4+1] = rgba[i][GCOMP];
2262 dst[i*4+2] = rgba[i][BCOMP];
2263 dst[i*4+3] = rgba[i][ACOMP];
2268 dst[i*3+0] = rgba[i][BCOMP];
2269 dst[i*3+1] = rgba[i][GCOMP];
2270 dst[i*3+2] = rgba[i][RCOMP];
2275 dst[i*4+0] = rgba[i][BCOMP];
2276 dst[i*4+1] = rgba[i][GCOMP];
2277 dst[i*4+2] = rgba[i][RCOMP];
2278 dst[i*4+3] = rgba[i][ACOMP];
2283 dst[i*4+0] = rgba[i][ACOMP];
2284 dst[i*4+1] = rgba[i][BCOMP];
2285 dst[i*4+2] = rgba[i][GCOMP];
2286 dst[i*4+3] = rgba[i][RCOMP];
2292 dst[i*2+0] = rgba[i][RCOMP];
2293 dst[i*2+1] = rgba[i][GCOMP];
2297 _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
2301 case GL_HALF_FLOAT_ARB:
2303 GLhalfARB *dst = (GLhalfARB *) dstAddr;
2304 switch (dstFormat) {
2307 dst[i] = _mesa_float_to_half(rgba[i][RCOMP]);
2311 dst[i] = _mesa_float_to_half(rgba[i][GCOMP]);
2315 dst[i] = _mesa_float_to_half(rgba[i][BCOMP]);
2319 dst[i] = _mesa_float_to_half(rgba[i][ACOMP]);
2323 dst[i] = _mesa_float_to_half(luminance[i]);
2325 case GL_LUMINANCE_ALPHA:
2327 dst[i*2+0] = _mesa_float_to_half(luminance[i]);
2328 dst[i*2+1] = _mesa_float_to_half(rgba[i][ACOMP]);
2333 dst[i*3+0] = _mesa_float_to_half(rgba[i][RCOMP]);
2334 dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
2335 dst[i*3+2] = _mesa_float_to_half(rgba[i][BCOMP]);
2340 dst[i*4+0] = _mesa_float_to_half(rgba[i][RCOMP]);
2341 dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
2342 dst[i*4+2] = _mesa_float_to_half(rgba[i][BCOMP]);
2343 dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
2348 dst[i*3+0] = _mesa_float_to_half(rgba[i][BCOMP]);
2349 dst[i*3+1] = _mesa_float_to_half(rgba[i][GCOMP]);
2350 dst[i*3+2] = _mesa_float_to_half(rgba[i][RCOMP]);
2355 dst[i*4+0] = _mesa_float_to_half(rgba[i][BCOMP]);
2356 dst[i*4+1] = _mesa_float_to_half(rgba[i][GCOMP]);
2357 dst[i*4+2] = _mesa_float_to_half(rgba[i][RCOMP]);
2358 dst[i*4+3] = _mesa_float_to_half(rgba[i][ACOMP]);
2363 dst[i*4+0] = _mesa_float_to_half(rgba[i][ACOMP]);
2364 dst[i*4+1] = _mesa_float_to_half(rgba[i][BCOMP]);
2365 dst[i*4+2] = _mesa_float_to_half(rgba[i][GCOMP]);
2366 dst[i*4+3] = _mesa_float_to_half(rgba[i][RCOMP]);
2372 dst[i*2+0] = _mesa_float_to_half(rgba[i][RCOMP]);
2373 dst[i*2+1] = _mesa_float_to_half(rgba[i][GCOMP]);
2377 _mesa_problem(ctx, "bad format in _mesa_pack_rgba_span\n");
2381 case GL_UNSIGNED_BYTE_3_3_2:
2382 if (dstFormat == GL_RGB) {
2383 GLubyte *dst = (GLubyte *) dstAddr;
2385 dst[i] = (IROUND(rgba[i][RCOMP] * 7.0F) << 5)
2386 | (IROUND(rgba[i][GCOMP] * 7.0F) << 2)
2387 | (IROUND(rgba[i][BCOMP] * 3.0F) );
2391 case GL_UNSIGNED_BYTE_2_3_3_REV:
2392 if (dstFormat == GL_RGB) {
2393 GLubyte *dst = (GLubyte *) dstAddr;
2395 dst[i] = (IROUND(rgba[i][RCOMP] * 7.0F) )
2396 | (IROUND(rgba[i][GCOMP] * 7.0F) << 3)
2397 | (IROUND(rgba[i][BCOMP] * 3.0F) << 6);
2401 case GL_UNSIGNED_SHORT_5_6_5:
2402 if (dstFormat == GL_RGB) {
2403 GLushort *dst = (GLushort *) dstAddr;
2405 dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) << 11)
2406 | (IROUND(rgba[i][GCOMP] * 63.0F) << 5)
2407 | (IROUND(rgba[i][BCOMP] * 31.0F) );
2411 case GL_UNSIGNED_SHORT_5_6_5_REV:
2412 if (dstFormat == GL_RGB) {
2413 GLushort *dst = (GLushort *) dstAddr;
2415 dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) )
2416 | (IROUND(rgba[i][GCOMP] * 63.0F) << 5)
2417 | (IROUND(rgba[i][BCOMP] * 31.0F) << 11);
2421 case GL_UNSIGNED_SHORT_4_4_4_4:
2422 if (dstFormat == GL_RGBA) {
2423 GLushort *dst = (GLushort *) dstAddr;
2425 dst[i] = (IROUND(rgba[i][RCOMP] * 15.0F) << 12)
2426 | (IROUND(rgba[i][GCOMP] * 15.0F) << 8)
2427 | (IROUND(rgba[i][BCOMP] * 15.0F) << 4)
2428 | (IROUND(rgba[i][ACOMP] * 15.0F) );
2431 else if (dstFormat == GL_BGRA) {
2432 GLushort *dst = (GLushort *) dstAddr;
2434 dst[i] = (IROUND(rgba[i][BCOMP] * 15.0F) << 12)
2435 | (IROUND(rgba[i][GCOMP] * 15.0F) << 8)
2436 | (IROUND(rgba[i][RCOMP] * 15.0F) << 4)
2437 | (IROUND(rgba[i][ACOMP] * 15.0F) );
2440 else if (dstFormat == GL_ABGR_EXT) {
2441 GLushort *dst = (GLushort *) dstAddr;
2443 dst[i] = (IROUND(rgba[i][ACOMP] * 15.0F) << 12)
2444 | (IROUND(rgba[i][BCOMP] * 15.0F) << 8)
2445 | (IROUND(rgba[i][GCOMP] * 15.0F) << 4)
2446 | (IROUND(rgba[i][RCOMP] * 15.0F) );
2450 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
2451 if (dstFormat == GL_RGBA) {
2452 GLushort *dst = (GLushort *) dstAddr;
2454 dst[i] = (IROUND(rgba[i][RCOMP] * 15.0F) )
2455 | (IROUND(rgba[i][GCOMP] * 15.0F) << 4)
2456 | (IROUND(rgba[i][BCOMP] * 15.0F) << 8)
2457 | (IROUND(rgba[i][ACOMP] * 15.0F) << 12);
2460 else if (dstFormat == GL_BGRA) {
2461 GLushort *dst = (GLushort *) dstAddr;
2463 dst[i] = (IROUND(rgba[i][BCOMP] * 15.0F) )
2464 | (IROUND(rgba[i][GCOMP] * 15.0F) << 4)
2465 | (IROUND(rgba[i][RCOMP] * 15.0F) << 8)
2466 | (IROUND(rgba[i][ACOMP] * 15.0F) << 12);
2469 else if (dstFormat == GL_ABGR_EXT) {
2470 GLushort *dst = (GLushort *) dstAddr;
2472 dst[i] = (IROUND(rgba[i][ACOMP] * 15.0F) )
2473 | (IROUND(rgba[i][BCOMP] * 15.0F) << 4)
2474 | (IROUND(rgba[i][GCOMP] * 15.0F) << 8)
2475 | (IROUND(rgba[i][RCOMP] * 15.0F) << 12);
2479 case GL_UNSIGNED_SHORT_5_5_5_1:
2480 if (dstFormat == GL_RGBA) {
2481 GLushort *dst = (GLushort *) dstAddr;
2483 dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) << 11)
2484 | (IROUND(rgba[i][GCOMP] * 31.0F) << 6)
2485 | (IROUND(rgba[i][BCOMP] * 31.0F) << 1)
2486 | (IROUND(rgba[i][ACOMP] * 1.0F) );
2489 else if (dstFormat == GL_BGRA) {
2490 GLushort *dst = (GLushort *) dstAddr;
2492 dst[i] = (IROUND(rgba[i][BCOMP] * 31.0F) << 11)
2493 | (IROUND(rgba[i][GCOMP] * 31.0F) << 6)
2494 | (IROUND(rgba[i][RCOMP] * 31.0F) << 1)
2495 | (IROUND(rgba[i][ACOMP] * 1.0F) );
2498 else if (dstFormat == GL_ABGR_EXT) {
2499 GLushort *dst = (GLushort *) dstAddr;
2501 dst[i] = (IROUND(rgba[i][ACOMP] * 31.0F) << 11)
2502 | (IROUND(rgba[i][BCOMP] * 31.0F) << 6)
2503 | (IROUND(rgba[i][GCOMP] * 31.0F) << 1)
2504 | (IROUND(rgba[i][RCOMP] * 1.0F) );
2508 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
2509 if (dstFormat == GL_RGBA) {
2510 GLushort *dst = (GLushort *) dstAddr;
2512 dst[i] = (IROUND(rgba[i][RCOMP] * 31.0F) )
2513 | (IROUND(rgba[i][GCOMP] * 31.0F) << 5)
2514 | (IROUND(rgba[i][BCOMP] * 31.0F) << 10)
2515 | (IROUND(rgba[i][ACOMP] * 1.0F) << 15);
2518 else if (dstFormat == GL_BGRA) {
2519 GLushort *dst = (GLushort *) dstAddr;
2521 dst[i] = (IROUND(rgba[i][BCOMP] * 31.0F) )
2522 | (IROUND(rgba[i][GCOMP] * 31.0F) << 5)
2523 | (IROUND(rgba[i][RCOMP] * 31.0F) << 10)
2524 | (IROUND(rgba[i][ACOMP] * 1.0F) << 15);
2527 else if (dstFormat == GL_ABGR_EXT) {
2528 GLushort *dst = (GLushort *) dstAddr;
2530 dst[i] = (IROUND(rgba[i][ACOMP] * 31.0F) )
2531 | (IROUND(rgba[i][BCOMP] * 31.0F) << 5)
2532 | (IROUND(rgba[i][GCOMP] * 31.0F) << 10)
2533 | (IROUND(rgba[i][RCOMP] * 1.0F) << 15);
2537 case GL_UNSIGNED_INT_8_8_8_8:
2538 if (dstFormat == GL_RGBA) {
2539 GLuint *dst = (GLuint *) dstAddr;
2541 dst[i] = (IROUND(rgba[i][RCOMP] * 255.F) << 24)
2542 | (IROUND(rgba[i][GCOMP] * 255.F) << 16)
2543 | (IROUND(rgba[i][BCOMP] * 255.F) << 8)
2544 | (IROUND(rgba[i][ACOMP] * 255.F) );
2547 else if (dstFormat == GL_BGRA) {
2548 GLuint *dst = (GLuint *) dstAddr;
2550 dst[i] = (IROUND(rgba[i][BCOMP] * 255.F) << 24)
2551 | (IROUND(rgba[i][GCOMP] * 255.F) << 16)
2552 | (IROUND(rgba[i][RCOMP] * 255.F) << 8)
2553 | (IROUND(rgba[i][ACOMP] * 255.F) );
2556 else if (dstFormat == GL_ABGR_EXT) {
2557 GLuint *dst = (GLuint *) dstAddr;
2559 dst[i] = (IROUND(rgba[i][ACOMP] * 255.F) << 24)
2560 | (IROUND(rgba[i][BCOMP] * 255.F) << 16)
2561 | (IROUND(rgba[i][GCOMP] * 255.F) << 8)
2562 | (IROUND(rgba[i][RCOMP] * 255.F) );
2566 case GL_UNSIGNED_INT_8_8_8_8_REV:
2567 if (dstFormat == GL_RGBA) {
2568 GLuint *dst = (GLuint *) dstAddr;
2570 dst[i] = (IROUND(rgba[i][RCOMP] * 255.0F) )
2571 | (IROUND(rgba[i][GCOMP] * 255.0F) << 8)
2572 | (IROUND(rgba[i][BCOMP] * 255.0F) << 16)
2573 | (IROUND(rgba[i][ACOMP] * 255.0F) << 24);
2576 else if (dstFormat == GL_BGRA) {
2577 GLuint *dst = (GLuint *) dstAddr;
2579 dst[i] = (IROUND(rgba[i][BCOMP] * 255.0F) )
2580 | (IROUND(rgba[i][GCOMP] * 255.0F) << 8)
2581 | (IROUND(rgba[i][RCOMP] * 255.0F) << 16)
2582 | (IROUND(rgba[i][ACOMP] * 255.0F) << 24);
2585 else if (dstFormat == GL_ABGR_EXT) {
2586 GLuint *dst = (GLuint *) dstAddr;
2588 dst[i] = (IROUND(rgba[i][ACOMP] * 255.0F) )
2589 | (IROUND(rgba[i][BCOMP] * 255.0F) << 8)
2590 | (IROUND(rgba[i][GCOMP] * 255.0F) << 16)
2591 | (IROUND(rgba[i][RCOMP] * 255.0F) << 24);
2595 case GL_UNSIGNED_INT_10_10_10_2:
2596 if (dstFormat == GL_RGBA) {
2597 GLuint *dst = (GLuint *) dstAddr;
2599 dst[i] = (IROUND(rgba[i][RCOMP] * 1023.0F) << 22)
2600 | (IROUND(rgba[i][GCOMP] * 1023.0F) << 12)
2601 | (IROUND(rgba[i][BCOMP] * 1023.0F) << 2)
2602 | (IROUND(rgba[i][ACOMP] * 3.0F) );
2605 else if (dstFormat == GL_BGRA) {
2606 GLuint *dst = (GLuint *) dstAddr;
2608 dst[i] = (IROUND(rgba[i][BCOMP] * 1023.0F) << 22)
2609 | (IROUND(rgba[i][GCOMP] * 1023.0F) << 12)
2610 | (IROUND(rgba[i][RCOMP] * 1023.0F) << 2)
2611 | (IROUND(rgba[i][ACOMP] * 3.0F) );
2614 else if (dstFormat == GL_ABGR_EXT) {
2615 GLuint *dst = (GLuint *) dstAddr;
2617 dst[i] = (IROUND(rgba[i][ACOMP] * 1023.0F) << 22)
2618 | (IROUND(rgba[i][BCOMP] * 1023.0F) << 12)
2619 | (IROUND(rgba[i][GCOMP] * 1023.0F) << 2)
2620 | (IROUND(rgba[i][RCOMP] * 3.0F) );
2624 case GL_UNSIGNED_INT_2_10_10_10_REV:
2625 if (dstFormat == GL_RGBA) {
2626 GLuint *dst = (GLuint *) dstAddr;
2628 dst[i] = (IROUND(rgba[i][RCOMP] * 1023.0F) )
2629 | (IROUND(rgba[i][GCOMP] * 1023.0F) << 10)
2630 | (IROUND(rgba[i][BCOMP] * 1023.0F) << 20)
2631 | (IROUND(rgba[i][ACOMP] * 3.0F) << 30);
2634 else if (dstFormat == GL_BGRA) {
2635 GLuint *dst = (GLuint *) dstAddr;
2637 dst[i] = (IROUND(rgba[i][BCOMP] * 1023.0F) )
2638 | (IROUND(rgba[i][GCOMP] * 1023.0F) << 10)
2639 | (IROUND(rgba[i][RCOMP] * 1023.0F) << 20)
2640 | (IROUND(rgba[i][ACOMP] * 3.0F) << 30);
2643 else if (dstFormat == GL_ABGR_EXT) {
2644 GLuint *dst = (GLuint *) dstAddr;
2646 dst[i] = (IROUND(rgba[i][ACOMP] * 1023.0F) )
2647 | (IROUND(rgba[i][BCOMP] * 1023.0F) << 10)
2648 | (IROUND(rgba[i][GCOMP] * 1023.0F) << 20)
2649 | (IROUND(rgba[i][RCOMP] * 3.0F) << 30);
2654 _mesa_problem(ctx, "bad type in _mesa_pack_rgba_span_float");
2658 if (dstPacking->SwapBytes) {
2659 GLint swapSize = _mesa_sizeof_packed_type(dstType);
2660 if (swapSize == 2) {
2661 if (dstPacking->SwapBytes) {
2662 _mesa_swap2((GLushort *) dstAddr, n * comps);
2665 else if (swapSize == 4) {
2666 if (dstPacking->SwapBytes) {
2667 _mesa_swap4((GLuint *) dstAddr, n * comps);
2674 #define SWAP2BYTE(VALUE) \
2676 GLubyte *bytes = (GLubyte *) &(VALUE); \
2677 GLubyte tmp = bytes[0]; \
2678 bytes[0] = bytes[1]; \
2682 #define SWAP4BYTE(VALUE) \
2684 GLubyte *bytes = (GLubyte *) &(VALUE); \
2685 GLubyte tmp = bytes[0]; \
2686 bytes[0] = bytes[3]; \
2689 bytes[1] = bytes[2]; \
2695 extract_uint_indexes(GLuint n, GLuint indexes[],
2696 GLenum srcFormat, GLenum srcType, const GLvoid *src,
2697 const struct gl_pixelstore_attrib *unpack )
2699 ASSERT(srcFormat == GL_COLOR_INDEX || srcFormat == GL_STENCIL_INDEX);
2701 ASSERT(srcType == GL_BITMAP ||
2702 srcType == GL_UNSIGNED_BYTE ||
2703 srcType == GL_BYTE ||
2704 srcType == GL_UNSIGNED_SHORT ||
2705 srcType == GL_SHORT ||
2706 srcType == GL_UNSIGNED_INT ||
2707 srcType == GL_INT ||
2708 srcType == GL_UNSIGNED_INT_24_8_EXT ||
2709 srcType == GL_HALF_FLOAT_ARB ||
2710 srcType == GL_FLOAT);
2715 GLubyte *ubsrc = (GLubyte *) src;
2716 if (unpack->LsbFirst) {
2717 GLubyte mask = 1 << (unpack->SkipPixels & 0x7);
2719 for (i = 0; i < n; i++) {
2720 indexes[i] = (*ubsrc & mask) ? 1 : 0;
2731 GLubyte mask = 128 >> (unpack->SkipPixels & 0x7);
2733 for (i = 0; i < n; i++) {
2734 indexes[i] = (*ubsrc & mask) ? 1 : 0;
2746 case GL_UNSIGNED_BYTE:
2749 const GLubyte *s = (const GLubyte *) src;
2750 for (i = 0; i < n; i++)
2757 const GLbyte *s = (const GLbyte *) src;
2758 for (i = 0; i < n; i++)
2762 case GL_UNSIGNED_SHORT:
2765 const GLushort *s = (const GLushort *) src;
2766 if (unpack->SwapBytes) {
2767 for (i = 0; i < n; i++) {
2768 GLushort value = s[i];
2774 for (i = 0; i < n; i++)
2782 const GLshort *s = (const GLshort *) src;
2783 if (unpack->SwapBytes) {
2784 for (i = 0; i < n; i++) {
2785 GLshort value = s[i];
2791 for (i = 0; i < n; i++)
2796 case GL_UNSIGNED_INT:
2799 const GLuint *s = (const GLuint *) src;
2800 if (unpack->SwapBytes) {
2801 for (i = 0; i < n; i++) {
2802 GLuint value = s[i];
2808 for (i = 0; i < n; i++)
2816 const GLint *s = (const GLint *) src;
2817 if (unpack->SwapBytes) {
2818 for (i = 0; i < n; i++) {
2825 for (i = 0; i < n; i++)
2833 const GLfloat *s = (const GLfloat *) src;
2834 if (unpack->SwapBytes) {
2835 for (i = 0; i < n; i++) {
2836 GLfloat value = s[i];
2838 indexes[i] = (GLuint) value;
2842 for (i = 0; i < n; i++)
2843 indexes[i] = (GLuint) s[i];
2847 case GL_HALF_FLOAT_ARB:
2850 const GLhalfARB *s = (const GLhalfARB *) src;
2851 if (unpack->SwapBytes) {
2852 for (i = 0; i < n; i++) {
2853 GLhalfARB value = s[i];
2855 indexes[i] = (GLuint) _mesa_half_to_float(value);
2859 for (i = 0; i < n; i++)
2860 indexes[i] = (GLuint) _mesa_half_to_float(s[i]);
2864 case GL_UNSIGNED_INT_24_8_EXT:
2867 const GLuint *s = (const GLuint *) src;
2868 if (unpack->SwapBytes) {
2869 for (i = 0; i < n; i++) {
2870 GLuint value = s[i];
2872 indexes[i] = value & 0xff; /* lower 8 bits */
2876 for (i = 0; i < n; i++)
2877 indexes[i] = s[i] & 0xff; /* lower 8 bits */
2883 _mesa_problem(NULL, "bad srcType in extract_uint_indexes");
2890 * This function extracts floating point RGBA values from arbitrary
2891 * image data. srcFormat and srcType are the format and type parameters
2892 * passed to glDrawPixels, glTexImage[123]D, glTexSubImage[123]D, etc.
2894 * Refering to section 3.6.4 of the OpenGL 1.2 spec, this function
2895 * implements the "Conversion to floating point", "Conversion to RGB",
2896 * and "Final Expansion to RGBA" operations.
2898 * Args: n - number of pixels
2899 * rgba - output colors
2900 * srcFormat - format of incoming data
2901 * srcType - data type of incoming data
2902 * src - source data pointer
2903 * swapBytes - perform byteswapping of incoming data?
2906 extract_float_rgba(GLuint n, GLfloat rgba[][4],
2907 GLenum srcFormat, GLenum srcType, const GLvoid *src,
2908 GLboolean swapBytes)
2910 GLint redIndex, greenIndex, blueIndex, alphaIndex;
2912 GLint rComp, bComp, gComp, aComp;
2914 ASSERT(srcFormat == GL_RED ||
2915 srcFormat == GL_GREEN ||
2916 srcFormat == GL_BLUE ||
2917 srcFormat == GL_ALPHA ||
2918 srcFormat == GL_LUMINANCE ||
2919 srcFormat == GL_LUMINANCE_ALPHA ||
2920 srcFormat == GL_INTENSITY ||
2921 srcFormat == GL_RGB ||
2922 srcFormat == GL_BGR ||
2923 srcFormat == GL_RGBA ||
2924 srcFormat == GL_BGRA ||
2925 srcFormat == GL_ABGR_EXT ||
2926 srcFormat == GL_DUDV_ATI);
2928 ASSERT(srcType == GL_UNSIGNED_BYTE ||
2929 srcType == GL_BYTE ||
2930 srcType == GL_UNSIGNED_SHORT ||
2931 srcType == GL_SHORT ||
2932 srcType == GL_UNSIGNED_INT ||
2933 srcType == GL_INT ||
2934 srcType == GL_HALF_FLOAT_ARB ||
2935 srcType == GL_FLOAT ||
2936 srcType == GL_UNSIGNED_BYTE_3_3_2 ||
2937 srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
2938 srcType == GL_UNSIGNED_SHORT_5_6_5 ||
2939 srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
2940 srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
2941 srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
2942 srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
2943 srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
2944 srcType == GL_UNSIGNED_INT_8_8_8_8 ||
2945 srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
2946 srcType == GL_UNSIGNED_INT_10_10_10_2 ||
2947 srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
2949 rComp = gComp = bComp = aComp = -1;
2951 switch (srcFormat) {
2954 greenIndex = blueIndex = alphaIndex = -1;
2959 redIndex = blueIndex = alphaIndex = -1;
2964 redIndex = greenIndex = alphaIndex = -1;
2968 redIndex = greenIndex = blueIndex = -1;
2973 redIndex = greenIndex = blueIndex = 0;
2977 case GL_LUMINANCE_ALPHA:
2978 redIndex = greenIndex = blueIndex = 0;
2983 redIndex = greenIndex = blueIndex = alphaIndex = 0;
3049 _mesa_problem(NULL, "bad srcFormat in extract float data");
3054 #define PROCESS(INDEX, CHANNEL, DEFAULT, TYPE, CONVERSION) \
3055 if ((INDEX) < 0) { \
3057 for (i = 0; i < n; i++) { \
3058 rgba[i][CHANNEL] = DEFAULT; \
3061 else if (swapBytes) { \
3062 const TYPE *s = (const TYPE *) src; \
3064 for (i = 0; i < n; i++) { \
3065 TYPE value = s[INDEX]; \
3066 if (sizeof(TYPE) == 2) { \
3069 else if (sizeof(TYPE) == 4) { \
3072 rgba[i][CHANNEL] = (GLfloat) CONVERSION(value); \
3077 const TYPE *s = (const TYPE *) src; \
3079 for (i = 0; i < n; i++) { \
3080 rgba[i][CHANNEL] = (GLfloat) CONVERSION(s[INDEX]); \
3086 case GL_UNSIGNED_BYTE:
3087 PROCESS(redIndex, RCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
3088 PROCESS(greenIndex, GCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
3089 PROCESS(blueIndex, BCOMP, 0.0F, GLubyte, UBYTE_TO_FLOAT);
3090 PROCESS(alphaIndex, ACOMP, 1.0F, GLubyte, UBYTE_TO_FLOAT);
3093 PROCESS(redIndex, RCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
3094 PROCESS(greenIndex, GCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
3095 PROCESS(blueIndex, BCOMP, 0.0F, GLbyte, BYTE_TO_FLOAT);
3096 PROCESS(alphaIndex, ACOMP, 1.0F, GLbyte, BYTE_TO_FLOAT);
3098 case GL_UNSIGNED_SHORT:
3099 PROCESS(redIndex, RCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
3100 PROCESS(greenIndex, GCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
3101 PROCESS(blueIndex, BCOMP, 0.0F, GLushort, USHORT_TO_FLOAT);
3102 PROCESS(alphaIndex, ACOMP, 1.0F, GLushort, USHORT_TO_FLOAT);
3105 PROCESS(redIndex, RCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
3106 PROCESS(greenIndex, GCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
3107 PROCESS(blueIndex, BCOMP, 0.0F, GLshort, SHORT_TO_FLOAT);
3108 PROCESS(alphaIndex, ACOMP, 1.0F, GLshort, SHORT_TO_FLOAT);
3110 case GL_UNSIGNED_INT:
3111 PROCESS(redIndex, RCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
3112 PROCESS(greenIndex, GCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
3113 PROCESS(blueIndex, BCOMP, 0.0F, GLuint, UINT_TO_FLOAT);
3114 PROCESS(alphaIndex, ACOMP, 1.0F, GLuint, UINT_TO_FLOAT);
3117 PROCESS(redIndex, RCOMP, 0.0F, GLint, INT_TO_FLOAT);
3118 PROCESS(greenIndex, GCOMP, 0.0F, GLint, INT_TO_FLOAT);
3119 PROCESS(blueIndex, BCOMP, 0.0F, GLint, INT_TO_FLOAT);
3120 PROCESS(alphaIndex, ACOMP, 1.0F, GLint, INT_TO_FLOAT);
3123 PROCESS(redIndex, RCOMP, 0.0F, GLfloat, (GLfloat));
3124 PROCESS(greenIndex, GCOMP, 0.0F, GLfloat, (GLfloat));
3125 PROCESS(blueIndex, BCOMP, 0.0F, GLfloat, (GLfloat));
3126 PROCESS(alphaIndex, ACOMP, 1.0F, GLfloat, (GLfloat));
3128 case GL_HALF_FLOAT_ARB:
3129 PROCESS(redIndex, RCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
3130 PROCESS(greenIndex, GCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
3131 PROCESS(blueIndex, BCOMP, 0.0F, GLhalfARB, _mesa_half_to_float);
3132 PROCESS(alphaIndex, ACOMP, 1.0F, GLhalfARB, _mesa_half_to_float);
3134 case GL_UNSIGNED_BYTE_3_3_2:
3136 const GLubyte *ubsrc = (const GLubyte *) src;
3138 for (i = 0; i < n; i ++) {
3139 GLubyte p = ubsrc[i];
3140 rgba[i][rComp] = ((p >> 5) ) * (1.0F / 7.0F);
3141 rgba[i][gComp] = ((p >> 2) & 0x7) * (1.0F / 7.0F);
3142 rgba[i][bComp] = ((p ) & 0x3) * (1.0F / 3.0F);
3143 rgba[i][aComp] = 1.0F;
3147 case GL_UNSIGNED_BYTE_2_3_3_REV:
3149 const GLubyte *ubsrc = (const GLubyte *) src;
3151 for (i = 0; i < n; i ++) {
3152 GLubyte p = ubsrc[i];
3153 rgba[i][rComp] = ((p ) & 0x7) * (1.0F / 7.0F);
3154 rgba[i][gComp] = ((p >> 3) & 0x7) * (1.0F / 7.0F);
3155 rgba[i][bComp] = ((p >> 6) ) * (1.0F / 3.0F);
3156 rgba[i][aComp] = 1.0F;
3160 case GL_UNSIGNED_SHORT_5_6_5:
3162 const GLushort *ussrc = (const GLushort *) src;
3164 for (i = 0; i < n; i ++) {
3165 GLushort p = ussrc[i];
3167 rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
3168 rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
3169 rgba[i][bComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
3170 rgba[i][aComp] = 1.0F;
3174 const GLushort *ussrc = (const GLushort *) src;
3176 for (i = 0; i < n; i ++) {
3177 GLushort p = ussrc[i];
3178 rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
3179 rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
3180 rgba[i][bComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
3181 rgba[i][aComp] = 1.0F;
3185 case GL_UNSIGNED_SHORT_5_6_5_REV:
3187 const GLushort *ussrc = (const GLushort *) src;
3189 for (i = 0; i < n; i ++) {
3190 GLushort p = ussrc[i];
3192 rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
3193 rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
3194 rgba[i][bComp] = ((p >> 11) ) * (1.0F / 31.0F);
3195 rgba[i][aComp] = 1.0F;
3199 const GLushort *ussrc = (const GLushort *) src;
3201 for (i = 0; i < n; i ++) {
3202 GLushort p = ussrc[i];
3203 rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
3204 rgba[i][gComp] = ((p >> 5) & 0x3f) * (1.0F / 63.0F);
3205 rgba[i][bComp] = ((p >> 11) ) * (1.0F / 31.0F);
3206 rgba[i][aComp] = 1.0F;
3210 case GL_UNSIGNED_SHORT_4_4_4_4:
3212 const GLushort *ussrc = (const GLushort *) src;
3214 for (i = 0; i < n; i ++) {
3215 GLushort p = ussrc[i];
3217 rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F);
3218 rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
3219 rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
3220 rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F);
3224 const GLushort *ussrc = (const GLushort *) src;
3226 for (i = 0; i < n; i ++) {
3227 GLushort p = ussrc[i];
3228 rgba[i][rComp] = ((p >> 12) ) * (1.0F / 15.0F);
3229 rgba[i][gComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
3230 rgba[i][bComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
3231 rgba[i][aComp] = ((p ) & 0xf) * (1.0F / 15.0F);
3235 case GL_UNSIGNED_SHORT_4_4_4_4_REV:
3237 const GLushort *ussrc = (const GLushort *) src;
3239 for (i = 0; i < n; i ++) {
3240 GLushort p = ussrc[i];
3242 rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F);
3243 rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
3244 rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
3245 rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F);
3249 const GLushort *ussrc = (const GLushort *) src;
3251 for (i = 0; i < n; i ++) {
3252 GLushort p = ussrc[i];
3253 rgba[i][rComp] = ((p ) & 0xf) * (1.0F / 15.0F);
3254 rgba[i][gComp] = ((p >> 4) & 0xf) * (1.0F / 15.0F);
3255 rgba[i][bComp] = ((p >> 8) & 0xf) * (1.0F / 15.0F);
3256 rgba[i][aComp] = ((p >> 12) ) * (1.0F / 15.0F);
3260 case GL_UNSIGNED_SHORT_5_5_5_1:
3262 const GLushort *ussrc = (const GLushort *) src;
3264 for (i = 0; i < n; i ++) {
3265 GLushort p = ussrc[i];
3267 rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
3268 rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F);
3269 rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F);
3270 rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F);
3274 const GLushort *ussrc = (const GLushort *) src;
3276 for (i = 0; i < n; i ++) {
3277 GLushort p = ussrc[i];
3278 rgba[i][rComp] = ((p >> 11) ) * (1.0F / 31.0F);
3279 rgba[i][gComp] = ((p >> 6) & 0x1f) * (1.0F / 31.0F);
3280 rgba[i][bComp] = ((p >> 1) & 0x1f) * (1.0F / 31.0F);
3281 rgba[i][aComp] = ((p ) & 0x1) * (1.0F / 1.0F);
3285 case GL_UNSIGNED_SHORT_1_5_5_5_REV:
3287 const GLushort *ussrc = (const GLushort *) src;
3289 for (i = 0; i < n; i ++) {
3290 GLushort p = ussrc[i];
3292 rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
3293 rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F);
3294 rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
3295 rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F);
3299 const GLushort *ussrc = (const GLushort *) src;
3301 for (i = 0; i < n; i ++) {
3302 GLushort p = ussrc[i];
3303 rgba[i][rComp] = ((p ) & 0x1f) * (1.0F / 31.0F);
3304 rgba[i][gComp] = ((p >> 5) & 0x1f) * (1.0F / 31.0F);
3305 rgba[i][bComp] = ((p >> 10) & 0x1f) * (1.0F / 31.0F);
3306 rgba[i][aComp] = ((p >> 15) ) * (1.0F / 1.0F);
3310 case GL_UNSIGNED_INT_8_8_8_8:
3312 const GLuint *uisrc = (const GLuint *) src;
3314 for (i = 0; i < n; i ++) {
3315 GLuint p = uisrc[i];
3316 rgba[i][rComp] = UBYTE_TO_FLOAT((p ) & 0xff);
3317 rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
3318 rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
3319 rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24) );
3323 const GLuint *uisrc = (const GLuint *) src;
3325 for (i = 0; i < n; i ++) {
3326 GLuint p = uisrc[i];
3327 rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24) );
3328 rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
3329 rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
3330 rgba[i][aComp] = UBYTE_TO_FLOAT((p ) & 0xff);
3334 case GL_UNSIGNED_INT_8_8_8_8_REV:
3336 const GLuint *uisrc = (const GLuint *) src;
3338 for (i = 0; i < n; i ++) {
3339 GLuint p = uisrc[i];
3340 rgba[i][rComp] = UBYTE_TO_FLOAT((p >> 24) );
3341 rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
3342 rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
3343 rgba[i][aComp] = UBYTE_TO_FLOAT((p ) & 0xff);
3347 const GLuint *uisrc = (const GLuint *) src;
3349 for (i = 0; i < n; i ++) {
3350 GLuint p = uisrc[i];
3351 rgba[i][rComp] = UBYTE_TO_FLOAT((p ) & 0xff);
3352 rgba[i][gComp] = UBYTE_TO_FLOAT((p >> 8) & 0xff);
3353 rgba[i][bComp] = UBYTE_TO_FLOAT((p >> 16) & 0xff);
3354 rgba[i][aComp] = UBYTE_TO_FLOAT((p >> 24) );
3358 case GL_UNSIGNED_INT_10_10_10_2:
3360 const GLuint *uisrc = (const GLuint *) src;
3362 for (i = 0; i < n; i ++) {
3363 GLuint p = uisrc[i];
3365 rgba[i][rComp] = ((p >> 22) ) * (1.0F / 1023.0F);
3366 rgba[i][gComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
3367 rgba[i][bComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F);
3368 rgba[i][aComp] = ((p ) & 0x3 ) * (1.0F / 3.0F);
3372 const GLuint *uisrc = (const GLuint *) src;
3374 for (i = 0; i < n; i ++) {
3375 GLuint p = uisrc[i];
3376 rgba[i][rComp] = ((p >> 22) ) * (1.0F / 1023.0F);
3377 rgba[i][gComp] = ((p >> 12) & 0x3ff) * (1.0F / 1023.0F);
3378 rgba[i][bComp] = ((p >> 2) & 0x3ff) * (1.0F / 1023.0F);
3379 rgba[i][aComp] = ((p ) & 0x3 ) * (1.0F / 3.0F);
3383 case GL_UNSIGNED_INT_2_10_10_10_REV:
3385 const GLuint *uisrc = (const GLuint *) src;
3387 for (i = 0; i < n; i ++) {
3388 GLuint p = uisrc[i];
3390 rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F);
3391 rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
3392 rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
3393 rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F);
3397 const GLuint *uisrc = (const GLuint *) src;
3399 for (i = 0; i < n; i ++) {
3400 GLuint p = uisrc[i];
3401 rgba[i][rComp] = ((p ) & 0x3ff) * (1.0F / 1023.0F);
3402 rgba[i][gComp] = ((p >> 10) & 0x3ff) * (1.0F / 1023.0F);
3403 rgba[i][bComp] = ((p >> 20) & 0x3ff) * (1.0F / 1023.0F);
3404 rgba[i][aComp] = ((p >> 30) ) * (1.0F / 3.0F);
3409 _mesa_problem(NULL, "bad srcType in extract float data");
3416 * Unpack a row of color image data from a client buffer according to
3417 * the pixel unpacking parameters.
3418 * Return GLchan values in the specified dest image format.
3419 * This is used by glDrawPixels and glTexImage?D().
3420 * \param ctx - the context
3421 * n - number of pixels in the span
3422 * dstFormat - format of destination color array
3423 * dest - the destination color array
3424 * srcFormat - source image format
3425 * srcType - source image data type
3426 * source - source image pointer
3427 * srcPacking - pixel unpacking parameters
3428 * transferOps - bitmask of IMAGE_*_BIT values of operations to apply
3430 * XXX perhaps expand this to process whole images someday.
3433 _mesa_unpack_color_span_chan( GLcontext *ctx,
3434 GLuint n, GLenum dstFormat, GLchan dest[],
3435 GLenum srcFormat, GLenum srcType,
3436 const GLvoid *source,
3437 const struct gl_pixelstore_attrib *srcPacking,
3438 GLbitfield transferOps )
3440 ASSERT(dstFormat == GL_ALPHA ||
3441 dstFormat == GL_LUMINANCE ||
3442 dstFormat == GL_LUMINANCE_ALPHA ||
3443 dstFormat == GL_INTENSITY ||
3444 dstFormat == GL_RGB ||
3445 dstFormat == GL_RGBA ||
3446 dstFormat == GL_COLOR_INDEX);
3448 ASSERT(srcFormat == GL_RED ||
3449 srcFormat == GL_GREEN ||
3450 srcFormat == GL_BLUE ||
3451 srcFormat == GL_ALPHA ||
3452 srcFormat == GL_LUMINANCE ||
3453 srcFormat == GL_LUMINANCE_ALPHA ||
3454 srcFormat == GL_INTENSITY ||
3455 srcFormat == GL_RGB ||
3456 srcFormat == GL_BGR ||
3457 srcFormat == GL_RGBA ||
3458 srcFormat == GL_BGRA ||
3459 srcFormat == GL_ABGR_EXT ||
3460 srcFormat == GL_COLOR_INDEX);
3462 ASSERT(srcType == GL_BITMAP ||
3463 srcType == GL_UNSIGNED_BYTE ||
3464 srcType == GL_BYTE ||
3465 srcType == GL_UNSIGNED_SHORT ||
3466 srcType == GL_SHORT ||
3467 srcType == GL_UNSIGNED_INT ||
3468 srcType == GL_INT ||
3469 srcType == GL_HALF_FLOAT_ARB ||
3470 srcType == GL_FLOAT ||
3471 srcType == GL_UNSIGNED_BYTE_3_3_2 ||
3472 srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
3473 srcType == GL_UNSIGNED_SHORT_5_6_5 ||
3474 srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
3475 srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
3476 srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
3477 srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
3478 srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
3479 srcType == GL_UNSIGNED_INT_8_8_8_8 ||
3480 srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
3481 srcType == GL_UNSIGNED_INT_10_10_10_2 ||
3482 srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
3484 /* Try simple cases first */
3485 if (transferOps == 0) {
3486 if (srcType == CHAN_TYPE) {
3487 if (dstFormat == GL_RGBA) {
3488 if (srcFormat == GL_RGBA) {
3489 _mesa_memcpy( dest, source, n * 4 * sizeof(GLchan) );
3492 else if (srcFormat == GL_RGB) {
3494 const GLchan *src = (const GLchan *) source;
3496 for (i = 0; i < n; i++) {
3507 else if (dstFormat == GL_RGB) {
3508 if (srcFormat == GL_RGB) {
3509 _mesa_memcpy( dest, source, n * 3 * sizeof(GLchan) );
3512 else if (srcFormat == GL_RGBA) {
3514 const GLchan *src = (const GLchan *) source;
3516 for (i = 0; i < n; i++) {
3526 else if (dstFormat == srcFormat) {
3527 GLint comps = _mesa_components_in_format(srcFormat);
3529 _mesa_memcpy( dest, source, n * comps * sizeof(GLchan) );
3534 * Common situation, loading 8bit RGBA/RGB source images
3535 * into 16/32 bit destination. (OSMesa16/32)
3537 else if (srcType == GL_UNSIGNED_BYTE) {
3538 if (dstFormat == GL_RGBA) {
3539 if (srcFormat == GL_RGB) {
3541 const GLubyte *src = (const GLubyte *) source;
3543 for (i = 0; i < n; i++) {
3544 dst[0] = UBYTE_TO_CHAN(src[0]);
3545 dst[1] = UBYTE_TO_CHAN(src[1]);
3546 dst[2] = UBYTE_TO_CHAN(src[2]);
3553 else if (srcFormat == GL_RGBA) {
3555 const GLubyte *src = (const GLubyte *) source;
3557 for (i = 0; i < n; i++) {
3558 dst[0] = UBYTE_TO_CHAN(src[0]);
3559 dst[1] = UBYTE_TO_CHAN(src[1]);
3560 dst[2] = UBYTE_TO_CHAN(src[2]);
3561 dst[3] = UBYTE_TO_CHAN(src[3]);
3568 else if (dstFormat == GL_RGB) {
3569 if (srcFormat == GL_RGB) {
3571 const GLubyte *src = (const GLubyte *) source;
3573 for (i = 0; i < n; i++) {
3574 dst[0] = UBYTE_TO_CHAN(src[0]);
3575 dst[1] = UBYTE_TO_CHAN(src[1]);
3576 dst[2] = UBYTE_TO_CHAN(src[2]);
3582 else if (srcFormat == GL_RGBA) {
3584 const GLubyte *src = (const GLubyte *) source;
3586 for (i = 0; i < n; i++) {
3587 dst[0] = UBYTE_TO_CHAN(src[0]);
3588 dst[1] = UBYTE_TO_CHAN(src[1]);
3589 dst[2] = UBYTE_TO_CHAN(src[2]);
3600 /* general solution begins here */
3602 GLint dstComponents;
3603 GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
3604 GLint dstLuminanceIndex, dstIntensityIndex;
3605 GLfloat rgba[MAX_WIDTH][4];
3607 dstComponents = _mesa_components_in_format( dstFormat );
3608 /* source & dest image formats should have been error checked by now */
3609 assert(dstComponents > 0);
3612 * Extract image data and convert to RGBA floats
3614 assert(n <= MAX_WIDTH);
3615 if (srcFormat == GL_COLOR_INDEX) {
3616 GLuint indexes[MAX_WIDTH];
3617 extract_uint_indexes(n, indexes, srcFormat, srcType, source,
3620 if (dstFormat == GL_COLOR_INDEX) {
3622 _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
3623 /* convert to GLchan and return */
3624 for (i = 0; i < n; i++) {
3625 dest[i] = (GLchan) (indexes[i] & 0xff);
3630 /* Convert indexes to RGBA */
3631 if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
3632 shift_and_offset_ci(ctx, n, indexes);
3634 _mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
3637 /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
3638 * with color indexes.
3640 transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT);
3643 /* non-color index data */
3644 extract_float_rgba(n, rgba, srcFormat, srcType, source,
3645 srcPacking->SwapBytes);
3648 /* Need to clamp if returning GLubytes or GLushorts */
3649 #if CHAN_TYPE != GL_FLOAT
3650 transferOps |= IMAGE_CLAMP_BIT;
3654 _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
3657 /* Now determine which color channels we need to produce.
3658 * And determine the dest index (offset) within each color tuple.
3660 switch (dstFormat) {
3663 dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
3664 dstLuminanceIndex = dstIntensityIndex = -1;
3667 dstLuminanceIndex = 0;
3668 dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
3669 dstIntensityIndex = -1;
3671 case GL_LUMINANCE_ALPHA:
3672 dstLuminanceIndex = 0;
3674 dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
3675 dstIntensityIndex = -1;
3678 dstIntensityIndex = 0;
3679 dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
3680 dstLuminanceIndex = -1;
3686 dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
3693 dstLuminanceIndex = dstIntensityIndex = -1;
3696 _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_chan_span()");
3701 /* Now return the GLchan data in the requested dstFormat */
3703 if (dstRedIndex >= 0) {
3706 for (i = 0; i < n; i++) {
3707 CLAMPED_FLOAT_TO_CHAN(dst[dstRedIndex], rgba[i][RCOMP]);
3708 dst += dstComponents;
3712 if (dstGreenIndex >= 0) {
3715 for (i = 0; i < n; i++) {
3716 CLAMPED_FLOAT_TO_CHAN(dst[dstGreenIndex], rgba[i][GCOMP]);
3717 dst += dstComponents;
3721 if (dstBlueIndex >= 0) {
3724 for (i = 0; i < n; i++) {
3725 CLAMPED_FLOAT_TO_CHAN(dst[dstBlueIndex], rgba[i][BCOMP]);
3726 dst += dstComponents;
3730 if (dstAlphaIndex >= 0) {
3733 for (i = 0; i < n; i++) {
3734 CLAMPED_FLOAT_TO_CHAN(dst[dstAlphaIndex], rgba[i][ACOMP]);
3735 dst += dstComponents;
3739 if (dstIntensityIndex >= 0) {
3742 assert(dstIntensityIndex == 0);
3743 assert(dstComponents == 1);
3744 for (i = 0; i < n; i++) {
3745 /* Intensity comes from red channel */
3746 CLAMPED_FLOAT_TO_CHAN(dst[i], rgba[i][RCOMP]);
3750 if (dstLuminanceIndex >= 0) {
3753 assert(dstLuminanceIndex == 0);
3754 for (i = 0; i < n; i++) {
3755 /* Luminance comes from red channel */
3756 CLAMPED_FLOAT_TO_CHAN(dst[0], rgba[i][RCOMP]);
3757 dst += dstComponents;
3765 * Same as _mesa_unpack_color_span_chan(), but return GLfloat data
3766 * instead of GLchan.
3769 _mesa_unpack_color_span_float( GLcontext *ctx,
3770 GLuint n, GLenum dstFormat, GLfloat dest[],
3771 GLenum srcFormat, GLenum srcType,
3772 const GLvoid *source,
3773 const struct gl_pixelstore_attrib *srcPacking,
3774 GLbitfield transferOps )
3776 ASSERT(dstFormat == GL_ALPHA ||
3777 dstFormat == GL_LUMINANCE ||
3778 dstFormat == GL_LUMINANCE_ALPHA ||
3779 dstFormat == GL_INTENSITY ||
3780 dstFormat == GL_RGB ||
3781 dstFormat == GL_RGBA ||
3782 dstFormat == GL_COLOR_INDEX);
3784 ASSERT(srcFormat == GL_RED ||
3785 srcFormat == GL_GREEN ||
3786 srcFormat == GL_BLUE ||
3787 srcFormat == GL_ALPHA ||
3788 srcFormat == GL_LUMINANCE ||
3789 srcFormat == GL_LUMINANCE_ALPHA ||
3790 srcFormat == GL_INTENSITY ||
3791 srcFormat == GL_RGB ||
3792 srcFormat == GL_BGR ||
3793 srcFormat == GL_RGBA ||
3794 srcFormat == GL_BGRA ||
3795 srcFormat == GL_ABGR_EXT ||
3796 srcFormat == GL_COLOR_INDEX);
3798 ASSERT(srcType == GL_BITMAP ||
3799 srcType == GL_UNSIGNED_BYTE ||
3800 srcType == GL_BYTE ||
3801 srcType == GL_UNSIGNED_SHORT ||
3802 srcType == GL_SHORT ||
3803 srcType == GL_UNSIGNED_INT ||
3804 srcType == GL_INT ||
3805 srcType == GL_HALF_FLOAT_ARB ||
3806 srcType == GL_FLOAT ||
3807 srcType == GL_UNSIGNED_BYTE_3_3_2 ||
3808 srcType == GL_UNSIGNED_BYTE_2_3_3_REV ||
3809 srcType == GL_UNSIGNED_SHORT_5_6_5 ||
3810 srcType == GL_UNSIGNED_SHORT_5_6_5_REV ||
3811 srcType == GL_UNSIGNED_SHORT_4_4_4_4 ||
3812 srcType == GL_UNSIGNED_SHORT_4_4_4_4_REV ||
3813 srcType == GL_UNSIGNED_SHORT_5_5_5_1 ||
3814 srcType == GL_UNSIGNED_SHORT_1_5_5_5_REV ||
3815 srcType == GL_UNSIGNED_INT_8_8_8_8 ||
3816 srcType == GL_UNSIGNED_INT_8_8_8_8_REV ||
3817 srcType == GL_UNSIGNED_INT_10_10_10_2 ||
3818 srcType == GL_UNSIGNED_INT_2_10_10_10_REV);
3820 /* general solution, no special cases, yet */
3822 GLint dstComponents;
3823 GLint dstRedIndex, dstGreenIndex, dstBlueIndex, dstAlphaIndex;
3824 GLint dstLuminanceIndex, dstIntensityIndex;
3825 GLfloat rgba[MAX_WIDTH][4];
3827 dstComponents = _mesa_components_in_format( dstFormat );
3828 /* source & dest image formats should have been error checked by now */
3829 assert(dstComponents > 0);
3832 * Extract image data and convert to RGBA floats
3834 assert(n <= MAX_WIDTH);
3835 if (srcFormat == GL_COLOR_INDEX) {
3836 GLuint indexes[MAX_WIDTH];
3837 extract_uint_indexes(n, indexes, srcFormat, srcType, source,
3840 if (dstFormat == GL_COLOR_INDEX) {
3842 _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
3843 /* convert to GLchan and return */
3844 for (i = 0; i < n; i++) {
3845 dest[i] = (GLchan) (indexes[i] & 0xff);
3850 /* Convert indexes to RGBA */
3851 if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
3852 shift_and_offset_ci(ctx, n, indexes);
3854 _mesa_map_ci_to_rgba(ctx, n, indexes, rgba);
3857 /* Don't do RGBA scale/bias or RGBA->RGBA mapping if starting
3858 * with color indexes.
3860 transferOps &= ~(IMAGE_SCALE_BIAS_BIT | IMAGE_MAP_COLOR_BIT);
3863 /* non-color index data */
3864 extract_float_rgba(n, rgba, srcFormat, srcType, source,
3865 srcPacking->SwapBytes);
3869 _mesa_apply_rgba_transfer_ops(ctx, transferOps, n, rgba);
3872 /* Now determine which color channels we need to produce.
3873 * And determine the dest index (offset) within each color tuple.
3875 switch (dstFormat) {
3878 dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
3879 dstLuminanceIndex = dstIntensityIndex = -1;
3882 dstLuminanceIndex = 0;
3883 dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
3884 dstIntensityIndex = -1;
3886 case GL_LUMINANCE_ALPHA:
3887 dstLuminanceIndex = 0;
3889 dstRedIndex = dstGreenIndex = dstBlueIndex = -1;
3890 dstIntensityIndex = -1;
3893 dstIntensityIndex = 0;
3894 dstRedIndex = dstGreenIndex = dstBlueIndex = dstAlphaIndex = -1;
3895 dstLuminanceIndex = -1;
3901 dstAlphaIndex = dstLuminanceIndex = dstIntensityIndex = -1;
3908 dstLuminanceIndex = dstIntensityIndex = -1;
3911 _mesa_problem(ctx, "bad dstFormat in _mesa_unpack_color_span_float()");
3915 /* Now pack results in the requested dstFormat */
3916 if (dstRedIndex >= 0) {
3917 GLfloat *dst = dest;
3919 for (i = 0; i < n; i++) {
3920 dst[dstRedIndex] = rgba[i][RCOMP];
3921 dst += dstComponents;
3925 if (dstGreenIndex >= 0) {
3926 GLfloat *dst = dest;
3928 for (i = 0; i < n; i++) {
3929 dst[dstGreenIndex] = rgba[i][GCOMP];
3930 dst += dstComponents;
3934 if (dstBlueIndex >= 0) {
3935 GLfloat *dst = dest;
3937 for (i = 0; i < n; i++) {
3938 dst[dstBlueIndex] = rgba[i][BCOMP];
3939 dst += dstComponents;
3943 if (dstAlphaIndex >= 0) {
3944 GLfloat *dst = dest;
3946 for (i = 0; i < n; i++) {
3947 dst[dstAlphaIndex] = rgba[i][ACOMP];
3948 dst += dstComponents;
3952 if (dstIntensityIndex >= 0) {
3953 GLfloat *dst = dest;
3955 assert(dstIntensityIndex == 0);
3956 assert(dstComponents == 1);
3957 for (i = 0; i < n; i++) {
3958 /* Intensity comes from red channel */
3959 dst[i] = rgba[i][RCOMP];
3963 if (dstLuminanceIndex >= 0) {
3964 GLfloat *dst = dest;
3966 assert(dstLuminanceIndex == 0);
3967 for (i = 0; i < n; i++) {
3968 /* Luminance comes from red channel */
3969 dst[0] = rgba[i][RCOMP];
3970 dst += dstComponents;
3977 * Similar to _mesa_unpack_color_span_float(), but for dudv data instead of rgba,
3978 * directly return GLbyte data, no transfer ops apply.
3981 _mesa_unpack_dudv_span_byte( GLcontext *ctx,
3982 GLuint n, GLenum dstFormat, GLbyte dest[],
3983 GLenum srcFormat, GLenum srcType,
3984 const GLvoid *source,
3985 const struct gl_pixelstore_attrib *srcPacking,
3986 GLbitfield transferOps )
3988 ASSERT(dstFormat == GL_DUDV_ATI);
3989 ASSERT(srcFormat == GL_DUDV_ATI);
3991 ASSERT(srcType == GL_UNSIGNED_BYTE ||
3992 srcType == GL_BYTE ||
3993 srcType == GL_UNSIGNED_SHORT ||
3994 srcType == GL_SHORT ||
3995 srcType == GL_UNSIGNED_INT ||
3996 srcType == GL_INT ||
3997 srcType == GL_HALF_FLOAT_ARB ||
3998 srcType == GL_FLOAT);
4000 /* general solution */
4002 GLint dstComponents;
4003 GLfloat rgba[MAX_WIDTH][4];
4007 dstComponents = _mesa_components_in_format( dstFormat );
4008 /* source & dest image formats should have been error checked by now */
4009 assert(dstComponents > 0);
4012 * Extract image data and convert to RGBA floats
4014 assert(n <= MAX_WIDTH);
4015 extract_float_rgba(n, rgba, srcFormat, srcType, source,
4016 srcPacking->SwapBytes);
4019 /* Now determine which color channels we need to produce.
4020 * And determine the dest index (offset) within each color tuple.
4023 /* Now pack results in the requested dstFormat */
4024 for (i = 0; i < n; i++) {
4025 /* not sure - need clamp[-1,1] here? */
4026 dst[0] = FLOAT_TO_BYTE(rgba[i][RCOMP]);
4027 dst[1] = FLOAT_TO_BYTE(rgba[i][GCOMP]);
4028 dst += dstComponents;
4034 * Unpack a row of color index data from a client buffer according to
4035 * the pixel unpacking parameters.
4036 * This is (or will be) used by glDrawPixels, glTexImage[123]D, etc.
4038 * Args: ctx - the context
4039 * n - number of pixels
4040 * dstType - destination data type
4041 * dest - destination array
4042 * srcType - source pixel type
4043 * source - source data pointer
4044 * srcPacking - pixel unpacking parameters
4045 * transferOps - the pixel transfer operations to apply
4048 _mesa_unpack_index_span( const GLcontext *ctx, GLuint n,
4049 GLenum dstType, GLvoid *dest,
4050 GLenum srcType, const GLvoid *source,
4051 const struct gl_pixelstore_attrib *srcPacking,
4052 GLbitfield transferOps )
4054 ASSERT(srcType == GL_BITMAP ||
4055 srcType == GL_UNSIGNED_BYTE ||
4056 srcType == GL_BYTE ||
4057 srcType == GL_UNSIGNED_SHORT ||
4058 srcType == GL_SHORT ||
4059 srcType == GL_UNSIGNED_INT ||
4060 srcType == GL_INT ||
4061 srcType == GL_HALF_FLOAT_ARB ||
4062 srcType == GL_FLOAT);
4064 ASSERT(dstType == GL_UNSIGNED_BYTE ||
4065 dstType == GL_UNSIGNED_SHORT ||
4066 dstType == GL_UNSIGNED_INT);
4069 transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT);
4072 * Try simple cases first
4074 if (transferOps == 0 && srcType == GL_UNSIGNED_BYTE
4075 && dstType == GL_UNSIGNED_BYTE) {
4076 _mesa_memcpy(dest, source, n * sizeof(GLubyte));
4078 else if (transferOps == 0 && srcType == GL_UNSIGNED_INT
4079 && dstType == GL_UNSIGNED_INT && !srcPacking->SwapBytes) {
4080 _mesa_memcpy(dest, source, n * sizeof(GLuint));
4086 GLuint indexes[MAX_WIDTH];
4087 assert(n <= MAX_WIDTH);
4089 extract_uint_indexes(n, indexes, GL_COLOR_INDEX, srcType, source,
4093 _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
4095 /* convert to dest type */
4097 case GL_UNSIGNED_BYTE:
4099 GLubyte *dst = (GLubyte *) dest;
4101 for (i = 0; i < n; i++) {
4102 dst[i] = (GLubyte) (indexes[i] & 0xff);
4106 case GL_UNSIGNED_SHORT:
4108 GLuint *dst = (GLuint *) dest;
4110 for (i = 0; i < n; i++) {
4111 dst[i] = (GLushort) (indexes[i] & 0xffff);
4115 case GL_UNSIGNED_INT:
4116 _mesa_memcpy(dest, indexes, n * sizeof(GLuint));
4119 _mesa_problem(ctx, "bad dstType in _mesa_unpack_index_span");
4126 _mesa_pack_index_span( const GLcontext *ctx, GLuint n,
4127 GLenum dstType, GLvoid *dest, const GLuint *source,
4128 const struct gl_pixelstore_attrib *dstPacking,
4129 GLbitfield transferOps )
4131 GLuint indexes[MAX_WIDTH];
4133 ASSERT(n <= MAX_WIDTH);
4135 transferOps &= (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT);
4137 if (transferOps & (IMAGE_MAP_COLOR_BIT | IMAGE_SHIFT_OFFSET_BIT)) {
4138 /* make a copy of input */
4139 _mesa_memcpy(indexes, source, n * sizeof(GLuint));
4140 _mesa_apply_ci_transfer_ops(ctx, transferOps, n, indexes);
4145 case GL_UNSIGNED_BYTE:
4147 GLubyte *dst = (GLubyte *) dest;
4149 for (i = 0; i < n; i++) {
4150 *dst++ = (GLubyte) source[i];
4156 GLbyte *dst = (GLbyte *) dest;
4158 for (i = 0; i < n; i++) {
4159 dst[i] = (GLbyte) source[i];
4163 case GL_UNSIGNED_SHORT:
4165 GLushort *dst = (GLushort *) dest;
4167 for (i = 0; i < n; i++) {
4168 dst[i] = (GLushort) source[i];
4170 if (dstPacking->SwapBytes) {
4171 _mesa_swap2( (GLushort *) dst, n );
4177 GLshort *dst = (GLshort *) dest;
4179 for (i = 0; i < n; i++) {
4180 dst[i] = (GLshort) source[i];
4182 if (dstPacking->SwapBytes) {
4183 _mesa_swap2( (GLushort *) dst, n );
4187 case GL_UNSIGNED_INT:
4189 GLuint *dst = (GLuint *) dest;
4191 for (i = 0; i < n; i++) {
4192 dst[i] = (GLuint) source[i];
4194 if (dstPacking->SwapBytes) {
4195 _mesa_swap4( (GLuint *) dst, n );
4201 GLint *dst = (GLint *) dest;
4203 for (i = 0; i < n; i++) {
4204 dst[i] = (GLint) source[i];
4206 if (dstPacking->SwapBytes) {
4207 _mesa_swap4( (GLuint *) dst, n );
4213 GLfloat *dst = (GLfloat *) dest;
4215 for (i = 0; i < n; i++) {
4216 dst[i] = (GLfloat) source[i];
4218 if (dstPacking->SwapBytes) {
4219 _mesa_swap4( (GLuint *) dst, n );
4223 case GL_HALF_FLOAT_ARB:
4225 GLhalfARB *dst = (GLhalfARB *) dest;
4227 for (i = 0; i < n; i++) {
4228 dst[i] = _mesa_float_to_half((GLfloat) source[i]);
4230 if (dstPacking->SwapBytes) {
4231 _mesa_swap2( (GLushort *) dst, n );
4236 _mesa_problem(ctx, "bad type in _mesa_pack_index_span");
4242 * Unpack a row of stencil data from a client buffer according to
4243 * the pixel unpacking parameters.
4244 * This is (or will be) used by glDrawPixels
4246 * Args: ctx - the context
4247 * n - number of pixels
4248 * dstType - destination data type
4249 * dest - destination array
4250 * srcType - source pixel type
4251 * source - source data pointer
4252 * srcPacking - pixel unpacking parameters
4253 * transferOps - apply offset/bias/lookup ops?
4256 _mesa_unpack_stencil_span( const GLcontext *ctx, GLuint n,
4257 GLenum dstType, GLvoid *dest,
4258 GLenum srcType, const GLvoid *source,
4259 const struct gl_pixelstore_attrib *srcPacking,
4260 GLbitfield transferOps )
4262 ASSERT(srcType == GL_BITMAP ||
4263 srcType == GL_UNSIGNED_BYTE ||
4264 srcType == GL_BYTE ||
4265 srcType == GL_UNSIGNED_SHORT ||
4266 srcType == GL_SHORT ||
4267 srcType == GL_UNSIGNED_INT ||
4268 srcType == GL_INT ||
4269 srcType == GL_UNSIGNED_INT_24_8_EXT ||
4270 srcType == GL_HALF_FLOAT_ARB ||
4271 srcType == GL_FLOAT);
4273 ASSERT(dstType == GL_UNSIGNED_BYTE ||
4274 dstType == GL_UNSIGNED_SHORT ||
4275 dstType == GL_UNSIGNED_INT);
4277 /* only shift and offset apply to stencil */
4278 transferOps &= IMAGE_SHIFT_OFFSET_BIT;
4281 * Try simple cases first
4283 if (transferOps == 0 &&
4284 !ctx->Pixel.MapStencilFlag &&
4285 srcType == GL_UNSIGNED_BYTE &&
4286 dstType == GL_UNSIGNED_BYTE) {
4287 _mesa_memcpy(dest, source, n * sizeof(GLubyte));
4289 else if (transferOps == 0 &&
4290 !ctx->Pixel.MapStencilFlag &&
4291 srcType == GL_UNSIGNED_INT &&
4292 dstType == GL_UNSIGNED_INT &&
4293 !srcPacking->SwapBytes) {
4294 _mesa_memcpy(dest, source, n * sizeof(GLuint));
4300 GLuint indexes[MAX_WIDTH];
4301 assert(n <= MAX_WIDTH);
4303 extract_uint_indexes(n, indexes, GL_STENCIL_INDEX, srcType, source,
4306 if (transferOps & IMAGE_SHIFT_OFFSET_BIT) {
4307 /* shift and offset indexes */
4308 shift_and_offset_ci(ctx, n, indexes);
4311 if (ctx->Pixel.MapStencilFlag) {
4312 /* Apply stencil lookup table */
4313 const GLuint mask = ctx->PixelMaps.StoS.Size - 1;
4315 for (i = 0; i < n; i++) {
4316 indexes[i] = (GLuint)ctx->PixelMaps.StoS.Map[ indexes[i] & mask ];
4320 /* convert to dest type */
4322 case GL_UNSIGNED_BYTE:
4324 GLubyte *dst = (GLubyte *) dest;
4326 for (i = 0; i < n; i++) {
4327 dst[i] = (GLubyte) (indexes[i] & 0xff);
4331 case GL_UNSIGNED_SHORT:
4333 GLuint *dst = (GLuint *) dest;
4335 for (i = 0; i < n; i++) {
4336 dst[i] = (GLushort) (indexes[i] & 0xffff);
4340 case GL_UNSIGNED_INT:
4341 _mesa_memcpy(dest, indexes, n * sizeof(GLuint));
4344 _mesa_problem(ctx, "bad dstType in _mesa_unpack_stencil_span");
4351 _mesa_pack_stencil_span( const GLcontext *ctx, GLuint n,
4352 GLenum dstType, GLvoid *dest, const GLstencil *source,
4353 const struct gl_pixelstore_attrib *dstPacking )
4355 GLstencil stencil[MAX_WIDTH];
4357 ASSERT(n <= MAX_WIDTH);
4359 if (ctx->Pixel.IndexShift || ctx->Pixel.IndexOffset ||
4360 ctx->Pixel.MapStencilFlag) {
4361 /* make a copy of input */
4362 _mesa_memcpy(stencil, source, n * sizeof(GLstencil));
4363 _mesa_apply_stencil_transfer_ops(ctx, n, stencil);
4368 case GL_UNSIGNED_BYTE:
4369 if (sizeof(GLstencil) == 1) {
4370 _mesa_memcpy( dest, source, n );
4373 GLubyte *dst = (GLubyte *) dest;
4376 dst[i] = (GLubyte) source[i];
4382 GLbyte *dst = (GLbyte *) dest;
4385 dst[i] = (GLbyte) (source[i] & 0x7f);
4389 case GL_UNSIGNED_SHORT:
4391 GLushort *dst = (GLushort *) dest;
4394 dst[i] = (GLushort) source[i];
4396 if (dstPacking->SwapBytes) {
4397 _mesa_swap2( (GLushort *) dst, n );
4403 GLshort *dst = (GLshort *) dest;
4406 dst[i] = (GLshort) source[i];
4408 if (dstPacking->SwapBytes) {
4409 _mesa_swap2( (GLushort *) dst, n );
4413 case GL_UNSIGNED_INT:
4415 GLuint *dst = (GLuint *) dest;
4418 dst[i] = (GLuint) source[i];
4420 if (dstPacking->SwapBytes) {
4421 _mesa_swap4( (GLuint *) dst, n );
4427 GLint *dst = (GLint *) dest;
4430 dst[i] = (GLint) source[i];
4432 if (dstPacking->SwapBytes) {
4433 _mesa_swap4( (GLuint *) dst, n );
4439 GLfloat *dst = (GLfloat *) dest;
4442 dst[i] = (GLfloat) source[i];
4444 if (dstPacking->SwapBytes) {
4445 _mesa_swap4( (GLuint *) dst, n );
4449 case GL_HALF_FLOAT_ARB:
4451 GLhalfARB *dst = (GLhalfARB *) dest;
4454 dst[i] = _mesa_float_to_half( (float) source[i] );
4456 if (dstPacking->SwapBytes) {
4457 _mesa_swap2( (GLushort *) dst, n );
4462 if (dstPacking->LsbFirst) {
4463 GLubyte *dst = (GLubyte *) dest;
4466 for (i = 0; i < n; i++) {
4469 *dst |= ((source[i] != 0) << shift);
4478 GLubyte *dst = (GLubyte *) dest;
4481 for (i = 0; i < n; i++) {
4484 *dst |= ((source[i] != 0) << shift);
4494 _mesa_problem(ctx, "bad type in _mesa_pack_index_span");
4498 #define DEPTH_VALUES(GLTYPE, GLTYPE2FLOAT) \
4501 const GLTYPE *src = (const GLTYPE *)source; \
4502 for (i = 0; i < n; i++) { \
4503 GLTYPE value = src[i]; \
4504 if (srcPacking->SwapBytes) { \
4505 if (sizeof(GLTYPE) == 2) { \
4507 } else if (sizeof(GLTYPE) == 4) { \
4511 depthValues[i] = GLTYPE2FLOAT(value); \
4517 * Unpack a row of depth/z values from memory, returning GLushort, GLuint
4518 * or GLfloat values.
4519 * The glPixelTransfer (scale/bias) params will be applied.
4521 * \param dstType one of GL_UNSIGNED_SHORT, GL_UNSIGNED_INT, GL_FLOAT
4522 * \param depthMax max value for returned GLushort or GLuint values
4523 * (ignored for GLfloat).
4526 _mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
4527 GLenum dstType, GLvoid *dest, GLuint depthMax,
4528 GLenum srcType, const GLvoid *source,
4529 const struct gl_pixelstore_attrib *srcPacking )
4531 GLfloat depthTemp[MAX_WIDTH], *depthValues;
4532 GLboolean needClamp = GL_FALSE;
4534 /* Look for special cases first.
4535 * Not only are these faster, they're less prone to numeric conversion
4536 * problems. Otherwise, converting from an int type to a float then
4537 * back to an int type can introduce errors that will show up as
4538 * artifacts in things like depth peeling which uses glCopyTexImage.
4540 if (ctx->Pixel.DepthScale == 1.0 && ctx->Pixel.DepthBias == 0.0) {
4541 if (srcType == GL_UNSIGNED_INT && dstType == GL_UNSIGNED_SHORT) {
4542 const GLuint *src = (const GLuint *) source;
4543 GLushort *dst = (GLushort *) dest;
4545 for (i = 0; i < n; i++) {
4546 dst[i] = src[i] >> 16;
4550 if (srcType == GL_UNSIGNED_SHORT
4551 && dstType == GL_UNSIGNED_INT
4552 && depthMax == 0xffffffff) {
4553 const GLushort *src = (const GLushort *) source;
4554 GLuint *dst = (GLuint *) dest;
4556 for (i = 0; i < n; i++) {
4557 dst[i] = src[i] | (src[i] << 16);
4561 if (srcType == GL_UNSIGNED_INT_24_8
4562 && dstType == GL_UNSIGNED_INT
4563 && depthMax == 0xffffff) {
4564 const GLuint *src = (const GLuint *) source;
4565 GLuint *dst = (GLuint *) dest;
4567 for (i = 0; i < n; i++) {
4568 dst[i] = src[i] >> 8;
4572 /* XXX may want to add additional cases here someday */
4575 /* general case path follows */
4577 if (dstType == GL_FLOAT) {
4578 depthValues = (GLfloat *) dest;
4581 depthValues = depthTemp;
4584 /* Convert incoming values to GLfloat. Some conversions will require
4589 DEPTH_VALUES(GLbyte, BYTE_TO_FLOAT);
4590 needClamp = GL_TRUE;
4592 case GL_UNSIGNED_BYTE:
4593 DEPTH_VALUES(GLubyte, UBYTE_TO_FLOAT);
4596 DEPTH_VALUES(GLshort, SHORT_TO_FLOAT);
4597 needClamp = GL_TRUE;
4599 case GL_UNSIGNED_SHORT:
4600 DEPTH_VALUES(GLushort, USHORT_TO_FLOAT);
4603 DEPTH_VALUES(GLint, INT_TO_FLOAT);
4604 needClamp = GL_TRUE;
4606 case GL_UNSIGNED_INT:
4607 DEPTH_VALUES(GLuint, UINT_TO_FLOAT);
4609 case GL_UNSIGNED_INT_24_8_EXT: /* GL_EXT_packed_depth_stencil */
4610 if (dstType == GL_UNSIGNED_INT_24_8_EXT &&
4611 depthMax == 0xffffff &&
4612 ctx->Pixel.DepthScale == 1.0 &&
4613 ctx->Pixel.DepthBias == 0.0) {
4614 const GLuint *src = (const GLuint *) source;
4615 GLuint *zValues = (GLuint *) dest;
4617 for (i = 0; i < n; i++) {
4618 GLuint value = src[i];
4619 if (srcPacking->SwapBytes) {
4622 zValues[i] = value & 0xffffff00;
4627 const GLuint *src = (const GLuint *) source;
4628 const GLfloat scale = 1.0f / 0xffffff;
4630 for (i = 0; i < n; i++) {
4631 GLuint value = src[i];
4632 if (srcPacking->SwapBytes) {
4635 depthValues[i] = (value >> 8) * scale;
4640 DEPTH_VALUES(GLfloat, 1*);
4641 needClamp = GL_TRUE;
4643 case GL_HALF_FLOAT_ARB:
4646 const GLhalfARB *src = (const GLhalfARB *) source;
4647 for (i = 0; i < n; i++) {
4648 GLhalfARB value = src[i];
4649 if (srcPacking->SwapBytes) {
4652 depthValues[i] = _mesa_half_to_float(value);
4654 needClamp = GL_TRUE;
4658 _mesa_problem(NULL, "bad type in _mesa_unpack_depth_span()");
4662 /* apply depth scale and bias */
4664 const GLfloat scale = ctx->Pixel.DepthScale;
4665 const GLfloat bias = ctx->Pixel.DepthBias;
4666 if (scale != 1.0 || bias != 0.0) {
4668 for (i = 0; i < n; i++) {
4669 depthValues[i] = depthValues[i] * scale + bias;
4671 needClamp = GL_TRUE;
4675 /* clamp to [0, 1] */
4678 for (i = 0; i < n; i++) {
4679 depthValues[i] = (GLfloat)CLAMP(depthValues[i], 0.0, 1.0);
4684 * Convert values to dstType
4686 if (dstType == GL_UNSIGNED_INT) {
4687 GLuint *zValues = (GLuint *) dest;
4689 if (depthMax <= 0xffffff) {
4690 /* no overflow worries */
4691 for (i = 0; i < n; i++) {
4692 zValues[i] = (GLuint) (depthValues[i] * (GLfloat) depthMax);
4696 /* need to use double precision to prevent overflow problems */
4697 for (i = 0; i < n; i++) {
4698 GLdouble z = depthValues[i] * (GLfloat) depthMax;
4699 if (z >= (GLdouble) 0xffffffff)
4700 zValues[i] = 0xffffffff;
4702 zValues[i] = (GLuint) z;
4706 else if (dstType == GL_UNSIGNED_SHORT) {
4707 GLushort *zValues = (GLushort *) dest;
4709 ASSERT(depthMax <= 0xffff);
4710 for (i = 0; i < n; i++) {
4711 zValues[i] = (GLushort) (depthValues[i] * (GLfloat) depthMax);
4715 ASSERT(dstType == GL_FLOAT);
4716 /*ASSERT(depthMax == 1.0F);*/
4722 * Pack an array of depth values. The values are floats in [0,1].
4725 _mesa_pack_depth_span( const GLcontext *ctx, GLuint n, GLvoid *dest,
4726 GLenum dstType, const GLfloat *depthSpan,
4727 const struct gl_pixelstore_attrib *dstPacking )
4729 GLfloat depthCopy[MAX_WIDTH];
4731 ASSERT(n <= MAX_WIDTH);
4733 if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
4734 _mesa_memcpy(depthCopy, depthSpan, n * sizeof(GLfloat));
4735 _mesa_scale_and_bias_depth(ctx, n, depthCopy);
4736 depthSpan = depthCopy;
4740 case GL_UNSIGNED_BYTE:
4742 GLubyte *dst = (GLubyte *) dest;
4744 for (i = 0; i < n; i++) {
4745 dst[i] = FLOAT_TO_UBYTE( depthSpan[i] );
4751 GLbyte *dst = (GLbyte *) dest;
4753 for (i = 0; i < n; i++) {
4754 dst[i] = FLOAT_TO_BYTE( depthSpan[i] );
4758 case GL_UNSIGNED_SHORT:
4760 GLushort *dst = (GLushort *) dest;
4762 for (i = 0; i < n; i++) {
4763 CLAMPED_FLOAT_TO_USHORT(dst[i], depthSpan[i]);
4765 if (dstPacking->SwapBytes) {
4766 _mesa_swap2( (GLushort *) dst, n );
4772 GLshort *dst = (GLshort *) dest;
4774 for (i = 0; i < n; i++) {
4775 dst[i] = FLOAT_TO_SHORT( depthSpan[i] );
4777 if (dstPacking->SwapBytes) {
4778 _mesa_swap2( (GLushort *) dst, n );
4782 case GL_UNSIGNED_INT:
4784 GLuint *dst = (GLuint *) dest;
4786 for (i = 0; i < n; i++) {
4787 dst[i] = FLOAT_TO_UINT( depthSpan[i] );
4789 if (dstPacking->SwapBytes) {
4790 _mesa_swap4( (GLuint *) dst, n );
4796 GLint *dst = (GLint *) dest;
4798 for (i = 0; i < n; i++) {
4799 dst[i] = FLOAT_TO_INT( depthSpan[i] );
4801 if (dstPacking->SwapBytes) {
4802 _mesa_swap4( (GLuint *) dst, n );
4808 GLfloat *dst = (GLfloat *) dest;
4810 for (i = 0; i < n; i++) {
4811 dst[i] = depthSpan[i];
4813 if (dstPacking->SwapBytes) {
4814 _mesa_swap4( (GLuint *) dst, n );
4818 case GL_HALF_FLOAT_ARB:
4820 GLhalfARB *dst = (GLhalfARB *) dest;
4822 for (i = 0; i < n; i++) {
4823 dst[i] = _mesa_float_to_half(depthSpan[i]);
4825 if (dstPacking->SwapBytes) {
4826 _mesa_swap2( (GLushort *) dst, n );
4831 _mesa_problem(ctx, "bad type in _mesa_pack_depth_span");
4838 * Pack depth and stencil values as GL_DEPTH_STENCIL/GL_UNSIGNED_INT_24_8.
4841 _mesa_pack_depth_stencil_span(const GLcontext *ctx, GLuint n, GLuint *dest,
4842 const GLfloat *depthVals,
4843 const GLstencil *stencilVals,
4844 const struct gl_pixelstore_attrib *dstPacking)
4846 GLfloat depthCopy[MAX_WIDTH];
4847 GLstencil stencilCopy[MAX_WIDTH];
4850 ASSERT(n <= MAX_WIDTH);
4852 if (ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0) {
4853 _mesa_memcpy(depthCopy, depthVals, n * sizeof(GLfloat));
4854 _mesa_scale_and_bias_depth(ctx, n, depthCopy);
4855 depthVals = depthCopy;
4858 if (ctx->Pixel.IndexShift ||
4859 ctx->Pixel.IndexOffset ||
4860 ctx->Pixel.MapStencilFlag) {
4861 _mesa_memcpy(stencilCopy, stencilVals, n * sizeof(GLstencil));
4862 _mesa_apply_stencil_transfer_ops(ctx, n, stencilCopy);
4863 stencilVals = stencilCopy;
4866 for (i = 0; i < n; i++) {
4867 GLuint z = (GLuint) (depthVals[i] * 0xffffff);
4868 dest[i] = (z << 8) | (stencilVals[i] & 0xff);
4871 if (dstPacking->SwapBytes) {
4872 _mesa_swap4(dest, n);
4880 * Unpack image data. Apply byte swapping, byte flipping (bitmap).
4881 * Return all image data in a contiguous block. This is used when we
4882 * compile glDrawPixels, glTexImage, etc into a display list. We
4883 * need a copy of the data in a standard format.
4886 _mesa_unpack_image( GLuint dimensions,
4887 GLsizei width, GLsizei height, GLsizei depth,
4888 GLenum format, GLenum type, const GLvoid *pixels,
4889 const struct gl_pixelstore_attrib *unpack )
4891 GLint bytesPerRow, compsPerRow;
4892 GLboolean flipBytes, swap2, swap4;
4895 return NULL; /* not necessarily an error */
4897 if (width <= 0 || height <= 0 || depth <= 0)
4898 return NULL; /* generate error later */
4900 if (type == GL_BITMAP) {
4901 bytesPerRow = (width + 7) >> 3;
4902 flipBytes = unpack->LsbFirst;
4903 swap2 = swap4 = GL_FALSE;
4907 const GLint bytesPerPixel = _mesa_bytes_per_pixel(format, type);
4908 GLint components = _mesa_components_in_format(format);
4911 if (_mesa_type_is_packed(type))
4914 if (bytesPerPixel <= 0 || components <= 0)
4915 return NULL; /* bad format or type. generate error later */
4916 bytesPerRow = bytesPerPixel * width;
4917 bytesPerComp = bytesPerPixel / components;
4918 flipBytes = GL_FALSE;
4919 swap2 = (bytesPerComp == 2) && unpack->SwapBytes;
4920 swap4 = (bytesPerComp == 4) && unpack->SwapBytes;
4921 compsPerRow = components * width;
4922 assert(compsPerRow >= width);
4927 = (GLubyte *) _mesa_malloc(bytesPerRow * height * depth);
4931 return NULL; /* generate GL_OUT_OF_MEMORY later */
4934 for (img = 0; img < depth; img++) {
4935 for (row = 0; row < height; row++) {
4936 const GLvoid *src = _mesa_image_address(dimensions, unpack, pixels,
4937 width, height, format, type, img, row, 0);
4939 if ((type == GL_BITMAP) && (unpack->SkipPixels & 0x7)) {
4941 flipBytes = GL_FALSE;
4942 if (unpack->LsbFirst) {
4943 GLubyte srcMask = 1 << (unpack->SkipPixels & 0x7);
4944 GLubyte dstMask = 128;
4945 const GLubyte *s = src;
4948 for (i = 0; i < width; i++) {
4952 if (srcMask == 128) {
4957 srcMask = srcMask << 1;
4965 dstMask = dstMask >> 1;
4970 GLubyte srcMask = 128 >> (unpack->SkipPixels & 0x7);
4971 GLubyte dstMask = 128;
4972 const GLubyte *s = src;
4975 for (i = 0; i < width; i++) {
4984 srcMask = srcMask >> 1;
4992 dstMask = dstMask >> 1;
4998 _mesa_memcpy(dst, src, bytesPerRow);
5001 /* byte flipping/swapping */
5003 flip_bytes((GLubyte *) dst, bytesPerRow);
5006 _mesa_swap2((GLushort*) dst, compsPerRow);
5009 _mesa_swap4((GLuint*) dst, compsPerRow);
5018 #endif /* _HAVE_FULL_GL */
5023 * Convert an array of RGBA colors from one datatype to another.
5024 * NOTE: src may equal dst. In that case, we use a temporary buffer.
5027 _mesa_convert_colors(GLenum srcType, const GLvoid *src,
5028 GLenum dstType, GLvoid *dst,
5029 GLuint count, const GLubyte mask[])
5031 GLuint tempBuffer[MAX_WIDTH][4];
5032 const GLboolean useTemp = (src == dst);
5034 ASSERT(srcType != dstType);
5037 case GL_UNSIGNED_BYTE:
5038 if (dstType == GL_UNSIGNED_SHORT) {
5039 const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
5040 GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
5042 for (i = 0; i < count; i++) {
5043 if (!mask || mask[i]) {
5044 dst2[i][RCOMP] = UBYTE_TO_USHORT(src1[i][RCOMP]);
5045 dst2[i][GCOMP] = UBYTE_TO_USHORT(src1[i][GCOMP]);
5046 dst2[i][BCOMP] = UBYTE_TO_USHORT(src1[i][BCOMP]);
5047 dst2[i][ACOMP] = UBYTE_TO_USHORT(src1[i][ACOMP]);
5051 _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
5054 const GLubyte (*src1)[4] = (const GLubyte (*)[4]) src;
5055 GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
5057 ASSERT(dstType == GL_FLOAT);
5058 for (i = 0; i < count; i++) {
5059 if (!mask || mask[i]) {
5060 dst4[i][RCOMP] = UBYTE_TO_FLOAT(src1[i][RCOMP]);
5061 dst4[i][GCOMP] = UBYTE_TO_FLOAT(src1[i][GCOMP]);
5062 dst4[i][BCOMP] = UBYTE_TO_FLOAT(src1[i][BCOMP]);
5063 dst4[i][ACOMP] = UBYTE_TO_FLOAT(src1[i][ACOMP]);
5067 _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
5070 case GL_UNSIGNED_SHORT:
5071 if (dstType == GL_UNSIGNED_BYTE) {
5072 const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
5073 GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
5075 for (i = 0; i < count; i++) {
5076 if (!mask || mask[i]) {
5077 dst1[i][RCOMP] = USHORT_TO_UBYTE(src2[i][RCOMP]);
5078 dst1[i][GCOMP] = USHORT_TO_UBYTE(src2[i][GCOMP]);
5079 dst1[i][BCOMP] = USHORT_TO_UBYTE(src2[i][BCOMP]);
5080 dst1[i][ACOMP] = USHORT_TO_UBYTE(src2[i][ACOMP]);
5084 _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
5087 const GLushort (*src2)[4] = (const GLushort (*)[4]) src;
5088 GLfloat (*dst4)[4] = (GLfloat (*)[4]) (useTemp ? tempBuffer : dst);
5090 ASSERT(dstType == GL_FLOAT);
5091 for (i = 0; i < count; i++) {
5092 if (!mask || mask[i]) {
5093 dst4[i][RCOMP] = USHORT_TO_FLOAT(src2[i][RCOMP]);
5094 dst4[i][GCOMP] = USHORT_TO_FLOAT(src2[i][GCOMP]);
5095 dst4[i][BCOMP] = USHORT_TO_FLOAT(src2[i][BCOMP]);
5096 dst4[i][ACOMP] = USHORT_TO_FLOAT(src2[i][ACOMP]);
5100 _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLfloat));
5104 if (dstType == GL_UNSIGNED_BYTE) {
5105 const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
5106 GLubyte (*dst1)[4] = (GLubyte (*)[4]) (useTemp ? tempBuffer : dst);
5108 for (i = 0; i < count; i++) {
5109 if (!mask || mask[i]) {
5110 UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][RCOMP], src4[i][RCOMP]);
5111 UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][GCOMP], src4[i][GCOMP]);
5112 UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][BCOMP], src4[i][BCOMP]);
5113 UNCLAMPED_FLOAT_TO_UBYTE(dst1[i][ACOMP], src4[i][ACOMP]);
5117 _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLubyte));
5120 const GLfloat (*src4)[4] = (const GLfloat (*)[4]) src;
5121 GLushort (*dst2)[4] = (GLushort (*)[4]) (useTemp ? tempBuffer : dst);
5123 ASSERT(dstType == GL_UNSIGNED_SHORT);
5124 for (i = 0; i < count; i++) {
5125 if (!mask || mask[i]) {
5126 UNCLAMPED_FLOAT_TO_USHORT(dst2[i][RCOMP], src4[i][RCOMP]);
5127 UNCLAMPED_FLOAT_TO_USHORT(dst2[i][GCOMP], src4[i][GCOMP]);
5128 UNCLAMPED_FLOAT_TO_USHORT(dst2[i][BCOMP], src4[i][BCOMP]);
5129 UNCLAMPED_FLOAT_TO_USHORT(dst2[i][ACOMP], src4[i][ACOMP]);
5133 _mesa_memcpy(dst, tempBuffer, count * 4 * sizeof(GLushort));
5137 _mesa_problem(NULL, "Invalid datatype in _mesa_convert_colors");
5145 * Perform basic clipping for glDrawPixels. The image's position and size
5146 * and the unpack SkipPixels and SkipRows are adjusted so that the image
5147 * region is entirely within the window and scissor bounds.
5148 * NOTE: this will only work when glPixelZoom is (1, 1) or (1, -1).
5149 * If Pixel.ZoomY is -1, *destY will be changed to be the first row which
5150 * we'll actually write. Beforehand, *destY-1 is the first drawing row.
5152 * \return GL_TRUE if image is ready for drawing or
5153 * GL_FALSE if image was completely clipped away (draw nothing)
5156 _mesa_clip_drawpixels(const GLcontext *ctx,
5157 GLint *destX, GLint *destY,
5158 GLsizei *width, GLsizei *height,
5159 struct gl_pixelstore_attrib *unpack)
5161 const GLframebuffer *buffer = ctx->DrawBuffer;
5163 if (unpack->RowLength == 0) {
5164 unpack->RowLength = *width;
5167 ASSERT(ctx->Pixel.ZoomX == 1.0F);
5168 ASSERT(ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F);
5171 if (*destX < buffer->_Xmin) {
5172 unpack->SkipPixels += (buffer->_Xmin - *destX);
5173 *width -= (buffer->_Xmin - *destX);
5174 *destX = buffer->_Xmin;
5176 /* right clipping */
5177 if (*destX + *width > buffer->_Xmax)
5178 *width -= (*destX + *width - buffer->_Xmax);
5183 if (ctx->Pixel.ZoomY == 1.0F) {
5184 /* bottom clipping */
5185 if (*destY < buffer->_Ymin) {
5186 unpack->SkipRows += (buffer->_Ymin - *destY);
5187 *height -= (buffer->_Ymin - *destY);
5188 *destY = buffer->_Ymin;
5191 if (*destY + *height > buffer->_Ymax)
5192 *height -= (*destY + *height - buffer->_Ymax);
5194 else { /* upside down */
5196 if (*destY > buffer->_Ymax) {
5197 unpack->SkipRows += (*destY - buffer->_Ymax);
5198 *height -= (*destY - buffer->_Ymax);
5199 *destY = buffer->_Ymax;
5201 /* bottom clipping */
5202 if (*destY - *height < buffer->_Ymin)
5203 *height -= (buffer->_Ymin - (*destY - *height));
5204 /* adjust destY so it's the first row to write to */
5216 * Perform clipping for glReadPixels. The image's window position
5217 * and size, and the pack skipPixels, skipRows and rowLength are adjusted
5218 * so that the image region is entirely within the window bounds.
5219 * Note: this is different from _mesa_clip_drawpixels() in that the
5220 * scissor box is ignored, and we use the bounds of the current readbuffer
5223 * \return GL_TRUE if image is ready for drawing or
5224 * GL_FALSE if image was completely clipped away (draw nothing)
5227 _mesa_clip_readpixels(const GLcontext *ctx,
5228 GLint *srcX, GLint *srcY,
5229 GLsizei *width, GLsizei *height,
5230 struct gl_pixelstore_attrib *pack)
5232 const GLframebuffer *buffer = ctx->ReadBuffer;
5234 if (pack->RowLength == 0) {
5235 pack->RowLength = *width;
5240 pack->SkipPixels += (0 - *srcX);
5241 *width -= (0 - *srcX);
5244 /* right clipping */
5245 if (*srcX + *width > (GLsizei) buffer->Width)
5246 *width -= (*srcX + *width - buffer->Width);
5251 /* bottom clipping */
5253 pack->SkipRows += (0 - *srcY);
5254 *height -= (0 - *srcY);
5258 if (*srcY + *height > (GLsizei) buffer->Height)
5259 *height -= (*srcY + *height - buffer->Height);
5269 * Do clipping for a glCopyTexSubImage call.
5270 * The framebuffer source region might extend outside the framebuffer
5271 * bounds. Clip the source region against the framebuffer bounds and
5272 * adjust the texture/dest position and size accordingly.
5274 * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise.
5277 _mesa_clip_copytexsubimage(const GLcontext *ctx,
5278 GLint *destX, GLint *destY,
5279 GLint *srcX, GLint *srcY,
5280 GLsizei *width, GLsizei *height)
5282 const struct gl_framebuffer *fb = ctx->ReadBuffer;
5283 const GLint srcX0 = *srcX, srcY0 = *srcY;
5285 if (_mesa_clip_to_region(0, 0, fb->Width, fb->Height,
5286 srcX, srcY, width, height)) {
5287 *destX = *destX + *srcX - srcX0;
5288 *destY = *destY + *srcY - srcY0;
5300 * Clip the rectangle defined by (x, y, width, height) against the bounds
5301 * specified by [xmin, xmax) and [ymin, ymax).
5302 * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.
5305 _mesa_clip_to_region(GLint xmin, GLint ymin,
5306 GLint xmax, GLint ymax,
5308 GLsizei *width, GLsizei *height )
5312 *width -= (xmin - *x);
5316 /* right clipping */
5317 if (*x + *width > xmax)
5318 *width -= (*x + *width - xmax);
5323 /* bottom (or top) clipping */
5325 *height -= (ymin - *y);
5329 /* top (or bottom) clipping */
5330 if (*y + *height > ymax)
5331 *height -= (*y + *height - ymax);