2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2004 Brian Paul All Rights Reserved.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
18 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
21 * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
22 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
31 * The GL texture image functions in teximage.c basically just do
32 * error checking and data structure allocation. They in turn call
33 * device driver functions which actually copy/convert/store the user's
36 * However, most device drivers will be able to use the fallback functions
37 * in this file. That is, most drivers will have the following bit of
39 * ctx->Driver.TexImage1D = _mesa_store_teximage1d;
40 * ctx->Driver.TexImage2D = _mesa_store_teximage2d;
41 * ctx->Driver.TexImage3D = _mesa_store_teximage3d;
44 * Texture image processing is actually kind of complicated. We have to do:
45 * Format/type conversions
47 * pixel transfer (scale, bais, lookup, convolution!, etc)
49 * These functions can handle most everything, including processing full
50 * images and sub-images.
61 #include "texcompress.h"
62 #include "texformat.h"
69 * Given an internal texture format enum or 1, 2, 3, 4 return the
70 * corresponding _base_ internal format: GL_ALPHA, GL_LUMINANCE,
71 * GL_LUMANCE_ALPHA, GL_INTENSITY, GL_RGB, or GL_RGBA. Return the
72 * number of components for the format. Return -1 if invalid enum.
75 components_in_intformat( GLint format
)
92 case GL_LUMINANCE_ALPHA
:
93 case GL_LUMINANCE4_ALPHA4
:
94 case GL_LUMINANCE6_ALPHA2
:
95 case GL_LUMINANCE8_ALPHA8
:
96 case GL_LUMINANCE12_ALPHA4
:
97 case GL_LUMINANCE12_ALPHA12
:
98 case GL_LUMINANCE16_ALPHA16
:
127 case GL_COLOR_INDEX1_EXT
:
128 case GL_COLOR_INDEX2_EXT
:
129 case GL_COLOR_INDEX4_EXT
:
130 case GL_COLOR_INDEX8_EXT
:
131 case GL_COLOR_INDEX12_EXT
:
132 case GL_COLOR_INDEX16_EXT
:
134 case GL_DEPTH_COMPONENT
:
135 case GL_DEPTH_COMPONENT16_SGIX
:
136 case GL_DEPTH_COMPONENT24_SGIX
:
137 case GL_DEPTH_COMPONENT32_SGIX
:
140 return 2; /* Y + (Cb or Cr) */
142 return -1; /* error */
148 * This function is used to transfer the user's image data into a texture
149 * image buffer. We handle both full texture images and subtexture images.
150 * We also take care of all image transfer operations here, including
151 * convolution, scale/bias, colortables, etc.
153 * The destination texel type is always GLchan.
154 * The destination texel format is one of the 6 basic types.
156 * A hardware driver may use this as a helper routine to unpack and
157 * apply pixel transfer ops into a temporary image buffer. Then,
158 * convert the temporary image into the special hardware format.
161 * dimensions - 1, 2, or 3
162 * texDestFormat - GL_LUMINANCE, GL_INTENSITY, GL_LUMINANCE_ALPHA, GL_ALPHA,
163 * GL_RGB or GL_RGBA (the destination format)
164 * texDestAddr - destination image address
165 * srcWidth, srcHeight, srcDepth - size (in pixels) of src and dest images
166 * dstXoffset, dstYoffset, dstZoffset - position to store the image within
167 * the destination 3D texture
168 * dstRowStride, dstImageStride - dest image strides in bytes
169 * srcFormat - source image format (GL_ALPHA, GL_RED, GL_RGB, etc)
170 * srcType - GL_UNSIGNED_BYTE, GL_UNSIGNED_SHORT_5_6_5, GL_FLOAT, etc
171 * srcPacking - describes packing of incoming image.
172 * transferOps - mask of pixel transfer operations
175 transfer_teximage(GLcontext
*ctx
, GLuint dimensions
,
176 GLenum texDestFormat
, GLvoid
*texDestAddr
,
177 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
178 GLint dstXoffset
, GLint dstYoffset
, GLint dstZoffset
,
179 GLint dstRowStride
, GLint dstImageStride
,
180 GLenum srcFormat
, GLenum srcType
,
181 const GLvoid
*srcAddr
,
182 const struct gl_pixelstore_attrib
*srcPacking
,
188 ASSERT(dimensions
>= 1 && dimensions
<= 3);
189 ASSERT(texDestFormat
== GL_LUMINANCE
||
190 texDestFormat
== GL_INTENSITY
||
191 texDestFormat
== GL_LUMINANCE_ALPHA
||
192 texDestFormat
== GL_ALPHA
||
193 texDestFormat
== GL_RGB
||
194 texDestFormat
== GL_RGBA
||
195 texDestFormat
== GL_COLOR_INDEX
||
196 texDestFormat
== GL_DEPTH_COMPONENT
);
198 ASSERT(srcWidth
>= 0);
199 ASSERT(srcHeight
>= 0);
200 ASSERT(srcDepth
>= 0);
201 ASSERT(dstXoffset
>= 0);
202 ASSERT(dstYoffset
>= 0);
203 ASSERT(dstZoffset
>= 0);
204 ASSERT(dstRowStride
>= 0);
205 ASSERT(dstImageStride
>= 0);
209 texComponents
= components_in_intformat(texDestFormat
);
211 /* try common 2D texture cases first */
212 if (!transferOps
&& dimensions
== 2 && srcType
== CHAN_TYPE
) {
214 if (srcFormat
== texDestFormat
) {
215 /* This will cover the common GL_RGB, GL_RGBA, GL_ALPHA,
216 * GL_LUMINANCE_ALPHA, etc. texture formats. Use memcpy().
218 const GLchan
*src
= (const GLchan
*) _mesa_image_address(
219 srcPacking
, srcAddr
, srcWidth
, srcHeight
,
220 srcFormat
, srcType
, 0, 0, 0);
221 const GLint srcRowStride
= _mesa_image_row_stride(srcPacking
,
222 srcWidth
, srcFormat
, srcType
);
223 const GLint widthInBytes
= srcWidth
* texComponents
* sizeof(GLchan
);
224 GLchan
*dst
= (GLchan
*) texDestAddr
225 + dstYoffset
* (dstRowStride
/ sizeof(GLchan
))
226 + dstXoffset
* texComponents
;
227 if (srcRowStride
== widthInBytes
&& dstRowStride
== widthInBytes
) {
228 MEMCPY(dst
, src
, srcHeight
* widthInBytes
);
232 for (i
= 0; i
< srcHeight
; i
++) {
233 MEMCPY(dst
, src
, widthInBytes
);
234 src
+= (srcRowStride
/ sizeof(GLchan
));
235 dst
+= (dstRowStride
/ sizeof(GLchan
));
238 return; /* all done */
240 else if (srcFormat
== GL_RGBA
&& texDestFormat
== GL_RGB
) {
241 /* commonly used by Quake */
242 const GLchan
*src
= (const GLchan
*) _mesa_image_address(
243 srcPacking
, srcAddr
, srcWidth
, srcHeight
,
244 srcFormat
, srcType
, 0, 0, 0);
245 const GLint srcRowStride
= _mesa_image_row_stride(srcPacking
,
246 srcWidth
, srcFormat
, srcType
);
247 GLchan
*dst
= (GLchan
*) texDestAddr
248 + dstYoffset
* (dstRowStride
/ sizeof(GLchan
))
249 + dstXoffset
* texComponents
;
251 for (i
= 0; i
< srcHeight
; i
++) {
252 const GLchan
*s
= src
;
254 for (j
= 0; j
< srcWidth
; j
++) {
256 *d
++ = *s
++; /*green*/
257 *d
++ = *s
++; /*blue*/
260 src
+= (srcRowStride
/ sizeof(GLchan
));
261 dst
+= (dstRowStride
/ sizeof(GLchan
));
263 return; /* all done */
268 * General case solutions
270 if (texDestFormat
== GL_COLOR_INDEX
) {
271 /* color index texture */
272 const GLenum texType
= CHAN_TYPE
;
274 GLchan
*dest
= (GLchan
*) texDestAddr
275 + dstZoffset
* (dstImageStride
/ sizeof(GLchan
))
276 + dstYoffset
* (dstRowStride
/ sizeof(GLchan
))
277 + dstXoffset
* texComponents
;
278 for (img
= 0; img
< srcDepth
; img
++) {
279 GLchan
*destRow
= dest
;
280 for (row
= 0; row
< srcHeight
; row
++) {
281 const GLvoid
*src
= _mesa_image_address(srcPacking
,
282 srcAddr
, srcWidth
, srcHeight
, srcFormat
, srcType
, img
, row
, 0);
283 _mesa_unpack_index_span(ctx
, srcWidth
, texType
, destRow
,
284 srcType
, src
, srcPacking
, transferOps
);
285 destRow
+= (dstRowStride
/ sizeof(GLchan
));
287 dest
+= dstImageStride
;
290 else if (texDestFormat
== GL_YCBCR_MESA
) {
293 GLushort
*dest
= (GLushort
*) texDestAddr
294 + dstZoffset
* (dstImageStride
/ sizeof(GLushort
))
295 + dstYoffset
* (dstRowStride
/ sizeof(GLushort
))
296 + dstXoffset
* texComponents
;
297 ASSERT(ctx
->Extensions
.MESA_ycbcr_texture
);
298 for (img
= 0; img
< srcDepth
; img
++) {
299 GLushort
*destRow
= dest
;
300 for (row
= 0; row
< srcHeight
; row
++) {
301 const GLvoid
*srcRow
= _mesa_image_address(srcPacking
,
302 srcAddr
, srcWidth
, srcHeight
,
303 srcFormat
, srcType
, img
, row
, 0);
304 MEMCPY(destRow
, srcRow
, srcWidth
* sizeof(GLushort
));
305 destRow
+= (dstRowStride
/ sizeof(GLushort
));
307 dest
+= dstImageStride
/ sizeof(GLushort
);
310 else if (texDestFormat
== GL_DEPTH_COMPONENT
) {
311 /* Depth texture (shadow maps) */
313 GLubyte
*dest
= (GLubyte
*) texDestAddr
314 + dstZoffset
* dstImageStride
315 + dstYoffset
* (dstRowStride
/ sizeof(GLchan
))
316 + dstXoffset
* texComponents
;
317 for (img
= 0; img
< srcDepth
; img
++) {
318 GLubyte
*destRow
= dest
;
319 for (row
= 0; row
< srcHeight
; row
++) {
320 const GLvoid
*src
= _mesa_image_address(srcPacking
,
321 srcAddr
, srcWidth
, srcHeight
, srcFormat
, srcType
, img
, row
, 0);
322 _mesa_unpack_depth_span(ctx
, srcWidth
, (GLfloat
*) destRow
,
323 srcType
, src
, srcPacking
);
324 destRow
+= (dstRowStride
/ sizeof(GLchan
));
326 dest
+= dstImageStride
;
330 /* regular, color texture */
331 if ((dimensions
== 1 && ctx
->Pixel
.Convolution1DEnabled
) ||
332 (dimensions
>= 2 && ctx
->Pixel
.Convolution2DEnabled
) ||
333 (dimensions
>= 2 && ctx
->Pixel
.Separable2DEnabled
)) {
335 * Fill texture image with convolution
338 GLint convWidth
= srcWidth
, convHeight
= srcHeight
;
339 GLfloat
*tmpImage
, *convImage
;
340 tmpImage
= (GLfloat
*) MALLOC(srcWidth
* srcHeight
* 4 * sizeof(GLfloat
));
342 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glTexImage");
345 convImage
= (GLfloat
*) MALLOC(srcWidth
* srcHeight
* 4 * sizeof(GLfloat
));
347 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glTexImage");
352 for (img
= 0; img
< srcDepth
; img
++) {
354 GLfloat
*dstf
= tmpImage
;
357 /* unpack and do transfer ops up to convolution */
358 for (row
= 0; row
< srcHeight
; row
++) {
359 const GLvoid
*src
= _mesa_image_address(srcPacking
,
360 srcAddr
, srcWidth
, srcHeight
,
361 srcFormat
, srcType
, img
, row
, 0);
362 _mesa_unpack_float_color_span(ctx
, srcWidth
, GL_RGBA
, dstf
,
363 srcFormat
, srcType
, src
, srcPacking
,
364 transferOps
& IMAGE_PRE_CONVOLUTION_BITS
,
366 dstf
+= srcWidth
* 4;
370 if (dimensions
== 1) {
371 ASSERT(ctx
->Pixel
.Convolution1DEnabled
);
372 _mesa_convolve_1d_image(ctx
, &convWidth
, tmpImage
, convImage
);
375 if (ctx
->Pixel
.Convolution2DEnabled
) {
376 _mesa_convolve_2d_image(ctx
, &convWidth
, &convHeight
,
377 tmpImage
, convImage
);
380 ASSERT(ctx
->Pixel
.Separable2DEnabled
);
381 _mesa_convolve_sep_image(ctx
, &convWidth
, &convHeight
,
382 tmpImage
, convImage
);
386 /* packing and transfer ops after convolution */
388 dest
= (GLchan
*) texDestAddr
389 + (dstZoffset
+ img
) * (dstImageStride
/ sizeof(GLchan
))
390 + dstYoffset
* (dstRowStride
/ sizeof(GLchan
));
391 for (row
= 0; row
< convHeight
; row
++) {
392 _mesa_pack_float_rgba_span(ctx
, convWidth
,
393 (const GLfloat (*)[4]) srcf
,
394 texDestFormat
, CHAN_TYPE
,
395 dest
, &_mesa_native_packing
,
397 & IMAGE_POST_CONVOLUTION_BITS
);
398 srcf
+= convWidth
* 4;
399 dest
+= (dstRowStride
/ sizeof(GLchan
));
411 GLchan
*dest
= (GLchan
*) texDestAddr
412 + dstZoffset
* (dstImageStride
/ sizeof(GLchan
))
413 + dstYoffset
* (dstRowStride
/ sizeof(GLchan
))
414 + dstXoffset
* texComponents
;
415 for (img
= 0; img
< srcDepth
; img
++) {
416 GLchan
*destRow
= dest
;
417 for (row
= 0; row
< srcHeight
; row
++) {
418 const GLvoid
*srcRow
= _mesa_image_address(srcPacking
,
419 srcAddr
, srcWidth
, srcHeight
,
420 srcFormat
, srcType
, img
, row
, 0);
421 _mesa_unpack_chan_color_span(ctx
, srcWidth
, texDestFormat
,
422 destRow
, srcFormat
, srcType
, srcRow
,
423 srcPacking
, transferOps
);
424 destRow
+= (dstRowStride
/ sizeof(GLchan
));
426 dest
+= dstImageStride
/ sizeof(GLchan
);
435 * Transfer a texture image from user space to <destAddr> applying all
436 * needed image transfer operations and storing the result in the format
437 * specified by <dstFormat>. <dstFormat> may be any format from texformat.h.
439 * dimensions - 1, 2 or 3
440 * baseInternalFormat - base format of the internal texture format
441 * specified by the user. This is very important, see below.
442 * dstFormat - destination image format
443 * dstAddr - destination address
444 * srcWidth, srcHeight, srcDepth - size of source iamge
445 * dstX/Y/Zoffset - as specified by glTexSubImage
446 * dstRowStride - stride between dest rows in bytes
447 * dstImageStride - stride between dest images in bytes
448 * srcFormat, srcType - incoming image format and data type
449 * srcAddr - source image address
450 * srcPacking - packing params of source image
452 * XXX this function is a bit more complicated than it should be. If
453 * _mesa_convert_texsubimage[123]d could handle any dest/source formats
454 * or if transfer_teximage() could store in any MESA_FORMAT_* format, we
455 * could simplify things here.
458 _mesa_transfer_teximage(GLcontext
*ctx
, GLuint dimensions
,
459 GLenum baseInternalFormat
,
460 const struct gl_texture_format
*dstFormat
,
462 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
463 GLint dstXoffset
, GLint dstYoffset
, GLint dstZoffset
,
464 GLint dstRowStride
, GLint dstImageStride
,
465 GLenum srcFormat
, GLenum srcType
,
466 const GLvoid
*srcAddr
,
467 const struct gl_pixelstore_attrib
*srcPacking
)
469 const GLint dstRowStridePixels
= dstRowStride
/ dstFormat
->TexelBytes
;
470 const GLint dstImageStridePixels
= dstImageStride
/ dstFormat
->TexelBytes
;
472 GLuint transferOps
= ctx
->_ImageTransferState
;
473 GLboolean freeSourceData
= GL_FALSE
;
474 GLint postConvWidth
= srcWidth
, postConvHeight
= srcHeight
;
476 assert(baseInternalFormat
> 0);
477 ASSERT(baseInternalFormat
== GL_LUMINANCE
||
478 baseInternalFormat
== GL_INTENSITY
||
479 baseInternalFormat
== GL_LUMINANCE_ALPHA
||
480 baseInternalFormat
== GL_ALPHA
||
481 baseInternalFormat
== GL_RGB
||
482 baseInternalFormat
== GL_RGBA
||
483 baseInternalFormat
== GL_YCBCR_MESA
||
484 baseInternalFormat
== GL_COLOR_INDEX
||
485 baseInternalFormat
== GL_DEPTH_COMPONENT
);
487 if (transferOps
& IMAGE_CONVOLUTION_BIT
) {
488 _mesa_adjust_image_for_convolution(ctx
, dimensions
, &postConvWidth
,
493 * Consider this scenario: The user's source image is GL_RGB and the
494 * requested internal format is GL_LUMINANCE. Now suppose the device
495 * driver doesn't support GL_LUMINANCE and instead uses RGB16 as the
496 * texture format. In that case we still need to do an intermediate
497 * conversion to luminance format so that the incoming red channel gets
498 * replicated into the dest red, green and blue channels. The following
499 * code takes care of that.
501 if (dstFormat
->BaseFormat
!= baseInternalFormat
) {
502 /* Allocate storage for temporary image in the baseInternalFormat */
503 const GLint texelSize
= _mesa_components_in_format(baseInternalFormat
)
505 const GLint bytes
= texelSize
* postConvWidth
* postConvHeight
*srcDepth
;
506 const GLint tmpRowStride
= texelSize
* postConvWidth
;
507 const GLint tmpImgStride
= texelSize
* postConvWidth
* postConvHeight
;
508 GLvoid
*tmpImage
= MALLOC(bytes
);
511 transfer_teximage(ctx
, dimensions
, baseInternalFormat
, tmpImage
,
512 srcWidth
, srcHeight
, srcDepth
,
513 0, 0, 0, /* x/y/zoffset */
514 tmpRowStride
, tmpImgStride
,
515 srcFormat
, srcType
, srcAddr
, srcPacking
, transferOps
);
517 /* this is our new source image */
518 srcWidth
= postConvWidth
;
519 srcHeight
= postConvHeight
;
520 srcFormat
= baseInternalFormat
;
523 srcPacking
= &_mesa_native_packing
;
524 freeSourceData
= GL_TRUE
;
525 transferOps
= 0; /* image transfer ops were completed */
528 /* Let the optimized tex conversion functions take a crack at the
529 * image conversion if the dest format is a h/w format.
531 if (_mesa_is_hardware_tex_format(dstFormat
)) {
536 if (dimensions
== 1) {
537 makeTemp
= !_mesa_convert_texsubimage1d(dstFormat
->MesaFormat
,
544 else if (dimensions
== 2) {
545 makeTemp
= !_mesa_convert_texsubimage2d(dstFormat
->MesaFormat
,
546 dstXoffset
, dstYoffset
,
554 assert(dimensions
== 3);
555 makeTemp
= !_mesa_convert_texsubimage3d(dstFormat
->MesaFormat
,
556 dstXoffset
, dstYoffset
, dstZoffset
,
557 srcWidth
, srcHeight
, srcDepth
,
558 dstRowStridePixels
, dstImageStridePixels
,
560 srcPacking
, srcAddr
, dstAddr
);
565 FREE((void *) srcAddr
);
571 /* software texture format */
576 GLint postConvWidth
= srcWidth
, postConvHeight
= srcHeight
;
578 GLuint tmpComps
, tmpTexelSize
;
579 GLint tmpRowStride
, tmpImageStride
;
582 if (transferOps
& IMAGE_CONVOLUTION_BIT
) {
583 _mesa_adjust_image_for_convolution(ctx
, dimensions
, &postConvWidth
,
587 tmpFormat
= dstFormat
->BaseFormat
;
588 tmpComps
= _mesa_components_in_format(tmpFormat
);
589 tmpTexelSize
= tmpComps
* sizeof(GLchan
);
590 tmpRowStride
= postConvWidth
* tmpTexelSize
;
591 tmpImageStride
= postConvWidth
* postConvHeight
* tmpTexelSize
;
592 tmpImage
= (GLubyte
*) MALLOC(postConvWidth
* postConvHeight
*
593 srcDepth
* tmpTexelSize
);
596 FREE((void *) srcAddr
);
600 transfer_teximage(ctx
, dimensions
, tmpFormat
, tmpImage
,
601 srcWidth
, srcHeight
, srcDepth
,
602 0, 0, 0, /* x/y/zoffset */
603 tmpRowStride
, tmpImageStride
,
604 srcFormat
, srcType
, srcAddr
, srcPacking
, transferOps
);
607 FREE((void *) srcAddr
);
609 /* the temp image is our new source image */
610 srcWidth
= postConvWidth
;
611 srcHeight
= postConvHeight
;
612 srcFormat
= tmpFormat
;
615 srcPacking
= &_mesa_native_packing
;
616 freeSourceData
= GL_TRUE
;
619 if (_mesa_is_hardware_tex_format(dstFormat
)) {
621 if (dimensions
== 1) {
623 b
= _mesa_convert_texsubimage1d(dstFormat
->MesaFormat
,
632 else if (dimensions
== 2) {
634 b
= _mesa_convert_texsubimage2d(dstFormat
->MesaFormat
,
635 dstXoffset
, dstYoffset
,
646 b
= _mesa_convert_texsubimage3d(dstFormat
->MesaFormat
,
647 dstXoffset
, dstYoffset
, dstZoffset
,
648 srcWidth
, srcHeight
, srcDepth
,
649 dstRowStridePixels
, dstImageStridePixels
,
651 srcPacking
, srcAddr
, dstAddr
);
657 /* software format */
659 transfer_teximage(ctx
, dimensions
, dstFormat
->BaseFormat
, dstAddr
,
660 srcWidth
, srcHeight
, srcDepth
,
661 dstXoffset
, dstYoffset
, dstZoffset
,
662 dstRowStride
, dstImageStride
,
663 srcFormat
, srcType
, srcAddr
, srcPacking
, transferOps
);
667 FREE((void *) srcAddr
); /* the temp image */
673 * Given a user's uncompressed texture image, this function takes care of
674 * pixel unpacking, pixel transfer, format conversion and compression.
677 transfer_compressed_teximage(GLcontext
*ctx
, GLuint dimensions
,
678 GLsizei width
, GLsizei height
, GLsizei depth
,
679 GLenum srcFormat
, GLenum srcType
,
680 const struct gl_pixelstore_attrib
*unpacking
,
681 const GLvoid
*source
,
682 const struct gl_texture_format
*dstFormat
,
686 GLchan
*tempImage
= NULL
;
690 ASSERT(dimensions
== 2);
691 /* TexelBytes is zero if and only if it's a compressed format */
692 ASSERT(dstFormat
->TexelBytes
== 0);
694 baseFormat
= dstFormat
->BaseFormat
;
696 if (srcFormat
!= baseFormat
|| srcType
!= CHAN_TYPE
||
697 ctx
->_ImageTransferState
!= 0 || unpacking
->SwapBytes
) {
698 /* need to convert user's image to texImage->Format, GLchan */
699 GLint comps
= components_in_intformat(baseFormat
);
700 GLint postConvWidth
= width
, postConvHeight
= height
;
702 /* XXX convolution untested */
703 if (ctx
->_ImageTransferState
& IMAGE_CONVOLUTION_BIT
) {
704 _mesa_adjust_image_for_convolution(ctx
, dimensions
, &postConvWidth
,
708 tempImage
= (GLchan
*) MALLOC(width
* height
* comps
* sizeof(GLchan
));
710 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glTexImage2D");
713 transfer_teximage(ctx
, dimensions
,
714 baseFormat
, /* dest format */
715 tempImage
, /* dst address */
716 width
, height
, depth
, /* src size */
717 0, 0, 0, /* x/y/zoffset */
718 comps
* width
, /* dst row stride */
719 comps
* width
* height
, /* dst image stride */
720 srcFormat
, srcType
, /* src format, type */
721 source
, unpacking
, /* src and src packing */
722 ctx
->_ImageTransferState
);
724 width
= postConvWidth
;
725 height
= postConvHeight
;
726 srcRowStride
= width
;
729 if (unpacking
->RowLength
)
730 srcRowStride
= unpacking
->RowLength
;
732 srcRowStride
= width
;
735 _mesa_compress_teximage(ctx
, width
, height
, baseFormat
,
736 (const GLchan
*) source
, srcRowStride
,
737 dstFormat
, dest
, dstRowStride
);
746 * This is the software fallback for Driver.TexImage1D()
747 * and Driver.CopyTexImage2D().
748 * The texture image type will be GLchan.
749 * The texture image format will be GL_COLOR_INDEX, GL_INTENSITY,
750 * GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_ALPHA, GL_RGB or GL_RGBA.
753 _mesa_store_teximage1d(GLcontext
*ctx
, GLenum target
, GLint level
,
754 GLint internalFormat
,
755 GLint width
, GLint border
,
756 GLenum format
, GLenum type
, const GLvoid
*pixels
,
757 const struct gl_pixelstore_attrib
*packing
,
758 struct gl_texture_object
*texObj
,
759 struct gl_texture_image
*texImage
)
761 GLint postConvWidth
= width
;
762 GLint texelBytes
, sizeInBytes
;
764 if (ctx
->_ImageTransferState
& IMAGE_CONVOLUTION_BIT
) {
765 _mesa_adjust_image_for_convolution(ctx
, 1, &postConvWidth
, NULL
);
768 /* choose the texture format */
769 assert(ctx
->Driver
.ChooseTextureFormat
);
770 texImage
->TexFormat
= (*ctx
->Driver
.ChooseTextureFormat
)(ctx
,
771 internalFormat
, format
, type
);
772 assert(texImage
->TexFormat
);
773 texImage
->FetchTexelc
= texImage
->TexFormat
->FetchTexel1D
;
774 texImage
->FetchTexelf
= texImage
->TexFormat
->FetchTexel1Df
;
776 texelBytes
= texImage
->TexFormat
->TexelBytes
;
778 /* allocate memory */
779 if (texImage
->IsCompressed
)
780 sizeInBytes
= texImage
->CompressedSize
;
782 sizeInBytes
= postConvWidth
* texelBytes
;
783 texImage
->Data
= MESA_PBUFFER_ALLOC(sizeInBytes
);
784 if (!texImage
->Data
) {
785 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glTexImage1D");
792 /* unpack image, apply transfer ops and store in texImage->Data */
793 if (texImage
->IsCompressed
) {
794 GLint dstRowStride
= _mesa_compressed_row_stride(texImage
->IntFormat
,
796 transfer_compressed_teximage(ctx
, 1, width
, 1, 1,
797 format
, type
, packing
,
798 pixels
, texImage
->TexFormat
,
799 (GLubyte
*) texImage
->Data
, dstRowStride
);
802 _mesa_transfer_teximage(ctx
, 1,
803 texImage
->Format
, /* base format */
804 texImage
->TexFormat
, texImage
->Data
,
805 width
, 1, 1, /* src size */
806 0, 0, 0, /* dstX/Y/Zoffset */
807 0, /* dstRowStride */
808 0, /* dstImageStride */
809 format
, type
, pixels
, packing
);
812 /* GL_SGIS_generate_mipmap */
813 if (level
== texObj
->BaseLevel
&& texObj
->GenerateMipmap
) {
814 _mesa_generate_mipmap(ctx
, target
,
815 &ctx
->Texture
.Unit
[ctx
->Texture
.CurrentUnit
],
822 * This is the software fallback for Driver.TexImage2D()
823 * and Driver.CopyTexImage2D().
824 * The texture image type will be GLchan.
825 * The texture image format will be GL_COLOR_INDEX, GL_INTENSITY,
826 * GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_ALPHA, GL_RGB or GL_RGBA.
829 _mesa_store_teximage2d(GLcontext
*ctx
, GLenum target
, GLint level
,
830 GLint internalFormat
,
831 GLint width
, GLint height
, GLint border
,
832 GLenum format
, GLenum type
, const void *pixels
,
833 const struct gl_pixelstore_attrib
*packing
,
834 struct gl_texture_object
*texObj
,
835 struct gl_texture_image
*texImage
)
837 GLint postConvWidth
= width
, postConvHeight
= height
;
838 GLint texelBytes
, sizeInBytes
;
840 if (ctx
->_ImageTransferState
& IMAGE_CONVOLUTION_BIT
) {
841 _mesa_adjust_image_for_convolution(ctx
, 2, &postConvWidth
,
845 /* choose the texture format */
846 assert(ctx
->Driver
.ChooseTextureFormat
);
847 texImage
->TexFormat
= (*ctx
->Driver
.ChooseTextureFormat
)(ctx
,
848 internalFormat
, format
, type
);
849 assert(texImage
->TexFormat
);
850 texImage
->FetchTexelc
= texImage
->TexFormat
->FetchTexel2D
;
851 texImage
->FetchTexelf
= texImage
->TexFormat
->FetchTexel2Df
;
853 texelBytes
= texImage
->TexFormat
->TexelBytes
;
855 /* allocate memory */
856 if (texImage
->IsCompressed
)
857 sizeInBytes
= texImage
->CompressedSize
;
859 sizeInBytes
= postConvWidth
* postConvHeight
* texelBytes
;
860 texImage
->Data
= MESA_PBUFFER_ALLOC(sizeInBytes
);
861 if (!texImage
->Data
) {
862 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glTexImage2D");
869 /* unpack image, apply transfer ops and store in texImage->Data */
870 if (texImage
->IsCompressed
) {
871 GLint dstRowStride
= _mesa_compressed_row_stride(texImage
->IntFormat
,
873 transfer_compressed_teximage(ctx
, 2, width
, height
, 1,
874 format
, type
, packing
,
875 pixels
, texImage
->TexFormat
,
876 (GLubyte
*) texImage
->Data
, dstRowStride
);
879 _mesa_transfer_teximage(ctx
, 2,
881 texImage
->TexFormat
, texImage
->Data
,
882 width
, height
, 1, /* src size */
883 0, 0, 0, /* dstX/Y/Zoffset */
884 texImage
->Width
* texelBytes
, /* dstRowStride */
885 0, /* dstImageStride */
886 format
, type
, pixels
, packing
);
889 /* GL_SGIS_generate_mipmap */
890 if (level
== texObj
->BaseLevel
&& texObj
->GenerateMipmap
) {
891 _mesa_generate_mipmap(ctx
, target
,
892 &ctx
->Texture
.Unit
[ctx
->Texture
.CurrentUnit
],
900 * This is the software fallback for Driver.TexImage3D()
901 * and Driver.CopyTexImage3D().
902 * The texture image type will be GLchan.
903 * The texture image format will be GL_COLOR_INDEX, GL_INTENSITY,
904 * GL_LUMINANCE, GL_LUMINANCE_ALPHA, GL_ALPHA, GL_RGB or GL_RGBA.
907 _mesa_store_teximage3d(GLcontext
*ctx
, GLenum target
, GLint level
,
908 GLint internalFormat
,
909 GLint width
, GLint height
, GLint depth
, GLint border
,
910 GLenum format
, GLenum type
, const void *pixels
,
911 const struct gl_pixelstore_attrib
*packing
,
912 struct gl_texture_object
*texObj
,
913 struct gl_texture_image
*texImage
)
915 GLint texelBytes
, sizeInBytes
;
917 /* choose the texture format */
918 assert(ctx
->Driver
.ChooseTextureFormat
);
919 texImage
->TexFormat
= (*ctx
->Driver
.ChooseTextureFormat
)(ctx
,
920 internalFormat
, format
, type
);
921 assert(texImage
->TexFormat
);
922 texImage
->FetchTexelc
= texImage
->TexFormat
->FetchTexel3D
;
923 texImage
->FetchTexelf
= texImage
->TexFormat
->FetchTexel3Df
;
925 texelBytes
= texImage
->TexFormat
->TexelBytes
;
927 /* allocate memory */
928 if (texImage
->IsCompressed
)
929 sizeInBytes
= texImage
->CompressedSize
;
931 sizeInBytes
= width
* height
* depth
* texelBytes
;
932 texImage
->Data
= MESA_PBUFFER_ALLOC(sizeInBytes
);
933 if (!texImage
->Data
) {
934 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glTexImage3D");
941 /* unpack image, apply transfer ops and store in texImage->Data */
942 if (texImage
->IsCompressed
) {
943 GLint dstRowStride
= _mesa_compressed_row_stride(texImage
->IntFormat
,
945 transfer_compressed_teximage(ctx
, 3, width
, height
, depth
,
946 format
, type
, packing
,
947 pixels
, texImage
->TexFormat
,
948 (GLubyte
*) texImage
->Data
, dstRowStride
);
951 _mesa_transfer_teximage(ctx
, 3,
953 texImage
->TexFormat
, texImage
->Data
,
954 width
, height
, depth
, /* src size */
955 0, 0, 0, /* dstX/Y/Zoffset */
956 texImage
->Width
* texelBytes
, /* dstRowStride */
957 texImage
->Width
* texImage
->Height
* texelBytes
,
958 format
, type
, pixels
, packing
);
961 /* GL_SGIS_generate_mipmap */
962 if (level
== texObj
->BaseLevel
&& texObj
->GenerateMipmap
) {
963 _mesa_generate_mipmap(ctx
, target
,
964 &ctx
->Texture
.Unit
[ctx
->Texture
.CurrentUnit
],
973 * This is the software fallback for Driver.TexSubImage1D()
974 * and Driver.CopyTexSubImage1D().
977 _mesa_store_texsubimage1d(GLcontext
*ctx
, GLenum target
, GLint level
,
978 GLint xoffset
, GLint width
,
979 GLenum format
, GLenum type
, const void *pixels
,
980 const struct gl_pixelstore_attrib
*packing
,
981 struct gl_texture_object
*texObj
,
982 struct gl_texture_image
*texImage
)
984 if (texImage
->IsCompressed
) {
985 GLint dstRowStride
= _mesa_compressed_row_stride(texImage
->IntFormat
,
987 GLubyte
*dest
= _mesa_compressed_image_address(xoffset
, 0, 0,
990 (GLubyte
*) texImage
->Data
);
991 transfer_compressed_teximage(ctx
, 1, /* dimensions */
992 width
, 1, 1, /* size to replace */
993 format
, type
, /* source format/type */
994 packing
, /* source packing */
995 pixels
, /* source data */
996 texImage
->TexFormat
,/* dest format */
1000 _mesa_transfer_teximage(ctx
, 1,
1002 texImage
->TexFormat
, texImage
->Data
,
1003 width
, 1, 1, /* src size */
1004 xoffset
, 0, 0, /* dest offsets */
1005 0, /* dstRowStride */
1006 0, /* dstImageStride */
1007 format
, type
, pixels
, packing
);
1010 /* GL_SGIS_generate_mipmap */
1011 if (level
== texObj
->BaseLevel
&& texObj
->GenerateMipmap
) {
1012 _mesa_generate_mipmap(ctx
, target
,
1013 &ctx
->Texture
.Unit
[ctx
->Texture
.CurrentUnit
],
1021 * This is the software fallback for Driver.TexSubImage2D()
1022 * and Driver.CopyTexSubImage2D().
1025 _mesa_store_texsubimage2d(GLcontext
*ctx
, GLenum target
, GLint level
,
1026 GLint xoffset
, GLint yoffset
,
1027 GLint width
, GLint height
,
1028 GLenum format
, GLenum type
, const void *pixels
,
1029 const struct gl_pixelstore_attrib
*packing
,
1030 struct gl_texture_object
*texObj
,
1031 struct gl_texture_image
*texImage
)
1033 if (texImage
->IsCompressed
) {
1034 GLint dstRowStride
= _mesa_compressed_row_stride(texImage
->IntFormat
,
1036 GLubyte
*dest
= _mesa_compressed_image_address(xoffset
, yoffset
, 0,
1037 texImage
->IntFormat
,
1039 (GLubyte
*) texImage
->Data
);
1040 transfer_compressed_teximage(ctx
, 2, /* dimensions */
1041 width
, height
, 1, /* size to replace */
1042 format
, type
, /* source format/type */
1043 packing
, /* source packing */
1044 pixels
, /* source data */
1045 texImage
->TexFormat
,/* dest format */
1046 dest
, dstRowStride
);
1049 _mesa_transfer_teximage(ctx
, 2,
1051 texImage
->TexFormat
, texImage
->Data
,
1052 width
, height
, 1, /* src size */
1053 xoffset
, yoffset
, 0, /* dest offsets */
1054 texImage
->Width
*texImage
->TexFormat
->TexelBytes
,
1055 0, /* dstImageStride */
1056 format
, type
, pixels
, packing
);
1059 /* GL_SGIS_generate_mipmap */
1060 if (level
== texObj
->BaseLevel
&& texObj
->GenerateMipmap
) {
1061 _mesa_generate_mipmap(ctx
, target
,
1062 &ctx
->Texture
.Unit
[ctx
->Texture
.CurrentUnit
],
1069 * This is the software fallback for Driver.TexSubImage3D().
1070 * and Driver.CopyTexSubImage3D().
1073 _mesa_store_texsubimage3d(GLcontext
*ctx
, GLenum target
, GLint level
,
1074 GLint xoffset
, GLint yoffset
, GLint zoffset
,
1075 GLint width
, GLint height
, GLint depth
,
1076 GLenum format
, GLenum type
, const void *pixels
,
1077 const struct gl_pixelstore_attrib
*packing
,
1078 struct gl_texture_object
*texObj
,
1079 struct gl_texture_image
*texImage
)
1081 if (texImage
->IsCompressed
) {
1082 GLint dstRowStride
= _mesa_compressed_row_stride(texImage
->IntFormat
,
1084 GLubyte
*dest
= _mesa_compressed_image_address(xoffset
, yoffset
, zoffset
,
1085 texImage
->IntFormat
,
1087 (GLubyte
*) texImage
->Data
);
1088 transfer_compressed_teximage(ctx
, 3, /* dimensions */
1089 width
, height
, depth
,/* size to replace */
1090 format
, type
, /* source format/type */
1091 packing
, /* source packing */
1092 pixels
, /* source data */
1093 texImage
->TexFormat
,/* dest format */
1094 dest
, dstRowStride
);
1097 const GLint texelBytes
= texImage
->TexFormat
->TexelBytes
;
1098 _mesa_transfer_teximage(ctx
, 3,
1100 texImage
->TexFormat
, texImage
->Data
,
1101 width
, height
, depth
, /* src size */
1102 xoffset
, yoffset
, zoffset
, /* dest offsets */
1103 texImage
->Width
* texelBytes
, /* dst row stride */
1104 texImage
->Width
* texImage
->Height
* texelBytes
,
1105 format
, type
, pixels
, packing
);
1108 /* GL_SGIS_generate_mipmap */
1109 if (level
== texObj
->BaseLevel
&& texObj
->GenerateMipmap
) {
1110 _mesa_generate_mipmap(ctx
, target
,
1111 &ctx
->Texture
.Unit
[ctx
->Texture
.CurrentUnit
],
1120 * Fallback for Driver.CompressedTexImage1D()
1123 _mesa_store_compressed_teximage1d(GLcontext
*ctx
, GLenum target
, GLint level
,
1124 GLint internalFormat
,
1125 GLint width
, GLint border
,
1126 GLsizei imageSize
, const GLvoid
*data
,
1127 struct gl_texture_object
*texObj
,
1128 struct gl_texture_image
*texImage
)
1130 /* this space intentionally left blank */
1136 * Fallback for Driver.CompressedTexImage2D()
1139 _mesa_store_compressed_teximage2d(GLcontext
*ctx
, GLenum target
, GLint level
,
1140 GLint internalFormat
,
1141 GLint width
, GLint height
, GLint border
,
1142 GLsizei imageSize
, const GLvoid
*data
,
1143 struct gl_texture_object
*texObj
,
1144 struct gl_texture_image
*texImage
)
1146 /* This is pretty simple, basically just do a memcpy without worrying
1147 * about the usual image unpacking or image transfer operations.
1151 ASSERT(texImage
->Width
> 0);
1152 ASSERT(texImage
->Height
> 0);
1153 ASSERT(texImage
->Depth
== 1);
1154 ASSERT(texImage
->Data
== NULL
); /* was freed in glCompressedTexImage2DARB */
1156 /* choose the texture format */
1157 assert(ctx
->Driver
.ChooseTextureFormat
);
1158 texImage
->TexFormat
= (*ctx
->Driver
.ChooseTextureFormat
)(ctx
,
1159 internalFormat
, 0, 0);
1160 assert(texImage
->TexFormat
);
1161 texImage
->FetchTexelc
= texImage
->TexFormat
->FetchTexel2D
;
1162 texImage
->FetchTexelf
= texImage
->TexFormat
->FetchTexel2Df
;
1164 /* allocate storage */
1165 texImage
->Data
= MESA_PBUFFER_ALLOC(imageSize
);
1166 if (!texImage
->Data
) {
1167 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "glCompressedTexImage2DARB");
1172 ASSERT(texImage
->CompressedSize
== (GLuint
) imageSize
);
1173 MEMCPY(texImage
->Data
, data
, imageSize
);
1179 * Fallback for Driver.CompressedTexImage3D()
1182 _mesa_store_compressed_teximage3d(GLcontext
*ctx
, GLenum target
, GLint level
,
1183 GLint internalFormat
,
1184 GLint width
, GLint height
, GLint depth
,
1186 GLsizei imageSize
, const GLvoid
*data
,
1187 struct gl_texture_object
*texObj
,
1188 struct gl_texture_image
*texImage
)
1190 /* this space intentionally left blank */
1196 * Fallback for Driver.CompressedTexSubImage1D()
1199 _mesa_store_compressed_texsubimage1d(GLcontext
*ctx
, GLenum target
,
1201 GLint xoffset
, GLsizei width
,
1203 GLsizei imageSize
, const GLvoid
*data
,
1204 struct gl_texture_object
*texObj
,
1205 struct gl_texture_image
*texImage
)
1207 /* this space intentionally left blank */
1212 * Fallback for Driver.CompressedTexSubImage2D()
1215 _mesa_store_compressed_texsubimage2d(GLcontext
*ctx
, GLenum target
,
1217 GLint xoffset
, GLint yoffset
,
1218 GLsizei width
, GLsizei height
,
1220 GLsizei imageSize
, const GLvoid
*data
,
1221 struct gl_texture_object
*texObj
,
1222 struct gl_texture_image
*texImage
)
1224 GLint bytesPerRow
, destRowStride
, srcRowStride
;
1229 /* these should have been caught sooner */
1230 ASSERT((width
& 3) == 0 || width
== 2 || width
== 1);
1231 ASSERT((height
& 3) == 0 || height
== 2 || height
== 1);
1232 ASSERT((xoffset
& 3) == 0);
1233 ASSERT((yoffset
& 3) == 0);
1235 srcRowStride
= _mesa_compressed_row_stride(texImage
->IntFormat
, width
);
1236 src
= (const GLubyte
*) data
;
1238 destRowStride
= _mesa_compressed_row_stride(texImage
->IntFormat
,
1240 dest
= _mesa_compressed_image_address(xoffset
, yoffset
, 0,
1241 texImage
->IntFormat
,
1243 (GLubyte
*) texImage
->Data
);
1245 bytesPerRow
= srcRowStride
;
1248 for (i
= 0; i
< rows
; i
++) {
1249 MEMCPY(dest
, src
, bytesPerRow
);
1250 dest
+= destRowStride
;
1251 src
+= srcRowStride
;
1257 * Fallback for Driver.CompressedTexSubImage3D()
1260 _mesa_store_compressed_texsubimage3d(GLcontext
*ctx
, GLenum target
,
1262 GLint xoffset
, GLint yoffset
, GLint zoffset
,
1263 GLsizei width
, GLsizei height
, GLsizei depth
,
1265 GLsizei imageSize
, const GLvoid
*data
,
1266 struct gl_texture_object
*texObj
,
1267 struct gl_texture_image
*texImage
)
1269 /* this space intentionally left blank */
1274 * Average together two rows of a source image to produce a single new
1275 * row in the dest image. It's legal for the two source rows to point
1276 * to the same data. The source width must be equal to either the
1277 * dest width or two times the dest width.
1280 do_row(const struct gl_texture_format
*format
, GLint srcWidth
,
1281 const GLvoid
*srcRowA
, const GLvoid
*srcRowB
,
1282 GLint dstWidth
, GLvoid
*dstRow
)
1284 const GLuint k0
= (srcWidth
== dstWidth
) ? 0 : 1;
1285 const GLuint colStride
= (srcWidth
== dstWidth
) ? 1 : 2;
1287 /* This assertion is no longer valid with non-power-of-2 textures
1288 assert(srcWidth == dstWidth || srcWidth == 2 * dstWidth);
1291 switch (format
->MesaFormat
) {
1292 case MESA_FORMAT_RGBA
:
1295 const GLchan (*rowA
)[4] = (const GLchan (*)[4]) srcRowA
;
1296 const GLchan (*rowB
)[4] = (const GLchan (*)[4]) srcRowB
;
1297 GLchan (*dst
)[4] = (GLchan (*)[4]) dstRow
;
1298 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1299 i
++, j
+= colStride
, k
+= colStride
) {
1300 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
1301 rowB
[j
][0] + rowB
[k
][0]) / 4;
1302 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
1303 rowB
[j
][1] + rowB
[k
][1]) / 4;
1304 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] +
1305 rowB
[j
][2] + rowB
[k
][2]) / 4;
1306 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] +
1307 rowB
[j
][3] + rowB
[k
][3]) / 4;
1311 case MESA_FORMAT_RGB
:
1314 const GLchan (*rowA
)[3] = (const GLchan (*)[3]) srcRowA
;
1315 const GLchan (*rowB
)[3] = (const GLchan (*)[3]) srcRowB
;
1316 GLchan (*dst
)[3] = (GLchan (*)[3]) dstRow
;
1317 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1318 i
++, j
+= colStride
, k
+= colStride
) {
1319 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
1320 rowB
[j
][0] + rowB
[k
][0]) / 4;
1321 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
1322 rowB
[j
][1] + rowB
[k
][1]) / 4;
1323 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] +
1324 rowB
[j
][2] + rowB
[k
][2]) / 4;
1328 case MESA_FORMAT_ALPHA
:
1329 case MESA_FORMAT_LUMINANCE
:
1330 case MESA_FORMAT_INTENSITY
:
1331 case MESA_FORMAT_COLOR_INDEX
:
1334 const GLchan
*rowA
= (const GLchan
*) srcRowA
;
1335 const GLchan
*rowB
= (const GLchan
*) srcRowB
;
1336 GLchan
*dst
= (GLchan
*) dstRow
;
1337 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1338 i
++, j
+= colStride
, k
+= colStride
) {
1339 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) / 4;
1343 case MESA_FORMAT_LUMINANCE_ALPHA
:
1346 const GLchan (*rowA
)[2] = (const GLchan (*)[2]) srcRowA
;
1347 const GLchan (*rowB
)[2] = (const GLchan (*)[2]) srcRowB
;
1348 GLchan (*dst
)[2] = (GLchan (*)[2]) dstRow
;
1349 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1350 i
++, j
+= colStride
, k
+= colStride
) {
1351 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
1352 rowB
[j
][0] + rowB
[k
][0]) / 4;
1353 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
1354 rowB
[j
][1] + rowB
[k
][1]) / 4;
1358 case MESA_FORMAT_DEPTH_COMPONENT
:
1361 const GLfloat
*rowA
= (const GLfloat
*) srcRowA
;
1362 const GLfloat
*rowB
= (const GLfloat
*) srcRowB
;
1363 GLfloat
*dst
= (GLfloat
*) dstRow
;
1364 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1365 i
++, j
+= colStride
, k
+= colStride
) {
1366 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) * 0.25F
;
1370 /* Begin hardware formats */
1371 case MESA_FORMAT_RGBA8888
:
1372 case MESA_FORMAT_ARGB8888
:
1375 const GLubyte (*rowA
)[4] = (const GLubyte (*)[4]) srcRowA
;
1376 const GLubyte (*rowB
)[4] = (const GLubyte (*)[4]) srcRowB
;
1377 GLubyte (*dst
)[4] = (GLubyte (*)[4]) dstRow
;
1378 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1379 i
++, j
+= colStride
, k
+= colStride
) {
1380 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
1381 rowB
[j
][0] + rowB
[k
][0]) / 4;
1382 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
1383 rowB
[j
][1] + rowB
[k
][1]) / 4;
1384 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] +
1385 rowB
[j
][2] + rowB
[k
][2]) / 4;
1386 dst
[i
][3] = (rowA
[j
][3] + rowA
[k
][3] +
1387 rowB
[j
][3] + rowB
[k
][3]) / 4;
1391 case MESA_FORMAT_RGB888
:
1394 const GLubyte (*rowA
)[3] = (const GLubyte (*)[3]) srcRowA
;
1395 const GLubyte (*rowB
)[3] = (const GLubyte (*)[3]) srcRowB
;
1396 GLubyte (*dst
)[3] = (GLubyte (*)[3]) dstRow
;
1397 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1398 i
++, j
+= colStride
, k
+= colStride
) {
1399 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
1400 rowB
[j
][0] + rowB
[k
][0]) / 4;
1401 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
1402 rowB
[j
][1] + rowB
[k
][1]) / 4;
1403 dst
[i
][2] = (rowA
[j
][2] + rowA
[k
][2] +
1404 rowB
[j
][2] + rowB
[k
][2]) / 4;
1408 case MESA_FORMAT_RGB565
:
1411 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
1412 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
1413 GLushort
*dst
= (GLushort
*) dstRow
;
1414 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1415 i
++, j
+= colStride
, k
+= colStride
) {
1416 const GLint rowAr0
= rowA
[j
] & 0x1f;
1417 const GLint rowAr1
= rowA
[k
] & 0x1f;
1418 const GLint rowBr0
= rowB
[j
] & 0x1f;
1419 const GLint rowBr1
= rowB
[k
] & 0x1f;
1420 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x3f;
1421 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x3f;
1422 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x3f;
1423 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x3f;
1424 const GLint rowAb0
= (rowA
[j
] >> 11) & 0x1f;
1425 const GLint rowAb1
= (rowA
[k
] >> 11) & 0x1f;
1426 const GLint rowBb0
= (rowB
[j
] >> 11) & 0x1f;
1427 const GLint rowBb1
= (rowB
[k
] >> 11) & 0x1f;
1428 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
1429 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
1430 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
1431 dst
[i
] = (blue
<< 11) | (green
<< 5) | red
;
1435 case MESA_FORMAT_ARGB4444
:
1438 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
1439 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
1440 GLushort
*dst
= (GLushort
*) dstRow
;
1441 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1442 i
++, j
+= colStride
, k
+= colStride
) {
1443 const GLint rowAr0
= rowA
[j
] & 0xf;
1444 const GLint rowAr1
= rowA
[k
] & 0xf;
1445 const GLint rowBr0
= rowB
[j
] & 0xf;
1446 const GLint rowBr1
= rowB
[k
] & 0xf;
1447 const GLint rowAg0
= (rowA
[j
] >> 4) & 0xf;
1448 const GLint rowAg1
= (rowA
[k
] >> 4) & 0xf;
1449 const GLint rowBg0
= (rowB
[j
] >> 4) & 0xf;
1450 const GLint rowBg1
= (rowB
[k
] >> 4) & 0xf;
1451 const GLint rowAb0
= (rowA
[j
] >> 8) & 0xf;
1452 const GLint rowAb1
= (rowA
[k
] >> 8) & 0xf;
1453 const GLint rowBb0
= (rowB
[j
] >> 8) & 0xf;
1454 const GLint rowBb1
= (rowB
[k
] >> 8) & 0xf;
1455 const GLint rowAa0
= (rowA
[j
] >> 12) & 0xf;
1456 const GLint rowAa1
= (rowA
[k
] >> 12) & 0xf;
1457 const GLint rowBa0
= (rowB
[j
] >> 12) & 0xf;
1458 const GLint rowBa1
= (rowB
[k
] >> 12) & 0xf;
1459 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
1460 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
1461 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
1462 const GLint alpha
= (rowAa0
+ rowAa1
+ rowBa0
+ rowBa1
) >> 2;
1463 dst
[i
] = (alpha
<< 12) | (blue
<< 8) | (green
<< 4) | red
;
1467 case MESA_FORMAT_ARGB1555
:
1470 const GLushort
*rowA
= (const GLushort
*) srcRowA
;
1471 const GLushort
*rowB
= (const GLushort
*) srcRowB
;
1472 GLushort
*dst
= (GLushort
*) dstRow
;
1473 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1474 i
++, j
+= colStride
, k
+= colStride
) {
1475 const GLint rowAr0
= rowA
[j
] & 0x1f;
1476 const GLint rowAr1
= rowA
[k
] & 0x1f;
1477 const GLint rowBr0
= rowB
[j
] & 0x1f;
1478 const GLint rowBr1
= rowB
[k
] & 0xf;
1479 const GLint rowAg0
= (rowA
[j
] >> 5) & 0x1f;
1480 const GLint rowAg1
= (rowA
[k
] >> 5) & 0x1f;
1481 const GLint rowBg0
= (rowB
[j
] >> 5) & 0x1f;
1482 const GLint rowBg1
= (rowB
[k
] >> 5) & 0x1f;
1483 const GLint rowAb0
= (rowA
[j
] >> 10) & 0x1f;
1484 const GLint rowAb1
= (rowA
[k
] >> 10) & 0x1f;
1485 const GLint rowBb0
= (rowB
[j
] >> 10) & 0x1f;
1486 const GLint rowBb1
= (rowB
[k
] >> 10) & 0x1f;
1487 const GLint rowAa0
= (rowA
[j
] >> 15) & 0x1;
1488 const GLint rowAa1
= (rowA
[k
] >> 15) & 0x1;
1489 const GLint rowBa0
= (rowB
[j
] >> 15) & 0x1;
1490 const GLint rowBa1
= (rowB
[k
] >> 15) & 0x1;
1491 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
1492 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
1493 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
1494 const GLint alpha
= (rowAa0
+ rowAa1
+ rowBa0
+ rowBa1
) >> 2;
1495 dst
[i
] = (alpha
<< 15) | (blue
<< 10) | (green
<< 5) | red
;
1499 case MESA_FORMAT_AL88
:
1502 const GLubyte (*rowA
)[2] = (const GLubyte (*)[2]) srcRowA
;
1503 const GLubyte (*rowB
)[2] = (const GLubyte (*)[2]) srcRowB
;
1504 GLubyte (*dst
)[2] = (GLubyte (*)[2]) dstRow
;
1505 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1506 i
++, j
+= colStride
, k
+= colStride
) {
1507 dst
[i
][0] = (rowA
[j
][0] + rowA
[k
][0] +
1508 rowB
[j
][0] + rowB
[k
][0]) >> 2;
1509 dst
[i
][1] = (rowA
[j
][1] + rowA
[k
][1] +
1510 rowB
[j
][1] + rowB
[k
][1]) >> 2;
1514 case MESA_FORMAT_RGB332
:
1517 const GLubyte
*rowA
= (const GLubyte
*) srcRowA
;
1518 const GLubyte
*rowB
= (const GLubyte
*) srcRowB
;
1519 GLubyte
*dst
= (GLubyte
*) dstRow
;
1520 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1521 i
++, j
+= colStride
, k
+= colStride
) {
1522 const GLint rowAr0
= rowA
[j
] & 0x3;
1523 const GLint rowAr1
= rowA
[k
] & 0x3;
1524 const GLint rowBr0
= rowB
[j
] & 0x3;
1525 const GLint rowBr1
= rowB
[k
] & 0x3;
1526 const GLint rowAg0
= (rowA
[j
] >> 2) & 0x7;
1527 const GLint rowAg1
= (rowA
[k
] >> 2) & 0x7;
1528 const GLint rowBg0
= (rowB
[j
] >> 2) & 0x7;
1529 const GLint rowBg1
= (rowB
[k
] >> 2) & 0x7;
1530 const GLint rowAb0
= (rowA
[j
] >> 5) & 0x7;
1531 const GLint rowAb1
= (rowA
[k
] >> 5) & 0x7;
1532 const GLint rowBb0
= (rowB
[j
] >> 5) & 0x7;
1533 const GLint rowBb1
= (rowB
[k
] >> 5) & 0x7;
1534 const GLint red
= (rowAr0
+ rowAr1
+ rowBr0
+ rowBr1
) >> 2;
1535 const GLint green
= (rowAg0
+ rowAg1
+ rowBg0
+ rowBg1
) >> 2;
1536 const GLint blue
= (rowAb0
+ rowAb1
+ rowBb0
+ rowBb1
) >> 2;
1537 dst
[i
] = (blue
<< 5) | (green
<< 2) | red
;
1541 case MESA_FORMAT_A8
:
1542 case MESA_FORMAT_L8
:
1543 case MESA_FORMAT_I8
:
1544 case MESA_FORMAT_CI8
:
1547 const GLubyte
*rowA
= (const GLubyte
*) srcRowA
;
1548 const GLubyte
*rowB
= (const GLubyte
*) srcRowB
;
1549 GLubyte
*dst
= (GLubyte
*) dstRow
;
1550 for (i
= j
= 0, k
= k0
; i
< (GLuint
) dstWidth
;
1551 i
++, j
+= colStride
, k
+= colStride
) {
1552 dst
[i
] = (rowA
[j
] + rowA
[k
] + rowB
[j
] + rowB
[k
]) >> 2;
1557 _mesa_problem(NULL
, "bad format in do_row()");
1563 * These functions generate a 1/2-size mipmap image from a source image.
1564 * Texture borders are handled by copying or averaging the source image's
1565 * border texels, depending on the scale-down factor.
1569 make_1d_mipmap(const struct gl_texture_format
*format
, GLint border
,
1570 GLint srcWidth
, const GLubyte
*srcPtr
,
1571 GLint dstWidth
, GLubyte
*dstPtr
)
1573 const GLint bpt
= format
->TexelBytes
;
1577 /* skip the border pixel, if any */
1578 src
= srcPtr
+ border
* bpt
;
1579 dst
= dstPtr
+ border
* bpt
;
1581 /* we just duplicate the input row, kind of hack, saves code */
1582 do_row(format
, srcWidth
- 2 * border
, src
, src
,
1583 dstWidth
- 2 * border
, dst
);
1586 /* copy left-most pixel from source */
1587 MEMCPY(dstPtr
, srcPtr
, bpt
);
1588 /* copy right-most pixel from source */
1589 MEMCPY(dstPtr
+ (dstWidth
- 1) * bpt
,
1590 srcPtr
+ (srcWidth
- 1) * bpt
,
1597 make_2d_mipmap(const struct gl_texture_format
*format
, GLint border
,
1598 GLint srcWidth
, GLint srcHeight
, const GLubyte
*srcPtr
,
1599 GLint dstWidth
, GLint dstHeight
, GLubyte
*dstPtr
)
1601 const GLint bpt
= format
->TexelBytes
;
1602 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1603 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1604 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1605 const GLint srcRowStride
= bpt
* srcWidth
;
1606 const GLint dstRowStride
= bpt
* dstWidth
;
1607 const GLubyte
*srcA
, *srcB
;
1609 GLint row
, colStride
;
1611 colStride
= (srcWidth
== dstWidth
) ? 1 : 2;
1613 /* Compute src and dst pointers, skipping any border */
1614 srcA
= srcPtr
+ border
* ((srcWidth
+ 1) * bpt
);
1616 srcB
= srcA
+ srcRowStride
;
1619 dst
= dstPtr
+ border
* ((dstWidth
+ 1) * bpt
);
1621 for (row
= 0; row
< dstHeightNB
; row
++) {
1622 do_row(format
, srcWidthNB
, srcA
, srcB
,
1624 srcA
+= 2 * srcRowStride
;
1625 srcB
+= 2 * srcRowStride
;
1626 dst
+= dstRowStride
;
1629 /* This is ugly but probably won't be used much */
1631 /* fill in dest border */
1632 /* lower-left border pixel */
1633 MEMCPY(dstPtr
, srcPtr
, bpt
);
1634 /* lower-right border pixel */
1635 MEMCPY(dstPtr
+ (dstWidth
- 1) * bpt
,
1636 srcPtr
+ (srcWidth
- 1) * bpt
, bpt
);
1637 /* upper-left border pixel */
1638 MEMCPY(dstPtr
+ dstWidth
* (dstHeight
- 1) * bpt
,
1639 srcPtr
+ srcWidth
* (srcHeight
- 1) * bpt
, bpt
);
1640 /* upper-right border pixel */
1641 MEMCPY(dstPtr
+ (dstWidth
* dstHeight
- 1) * bpt
,
1642 srcPtr
+ (srcWidth
* srcHeight
- 1) * bpt
, bpt
);
1644 do_row(format
, srcWidthNB
,
1647 dstWidthNB
, dstPtr
+ bpt
);
1649 do_row(format
, srcWidthNB
,
1650 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1651 srcPtr
+ (srcWidth
* (srcHeight
- 1) + 1) * bpt
,
1653 dstPtr
+ (dstWidth
* (dstHeight
- 1) + 1) * bpt
);
1654 /* left and right borders */
1655 if (srcHeight
== dstHeight
) {
1656 /* copy border pixel from src to dst */
1657 for (row
= 1; row
< srcHeight
; row
++) {
1658 MEMCPY(dstPtr
+ dstWidth
* row
* bpt
,
1659 srcPtr
+ srcWidth
* row
* bpt
, bpt
);
1660 MEMCPY(dstPtr
+ (dstWidth
* row
+ dstWidth
- 1) * bpt
,
1661 srcPtr
+ (srcWidth
* row
+ srcWidth
- 1) * bpt
, bpt
);
1665 /* average two src pixels each dest pixel */
1666 for (row
= 0; row
< dstHeightNB
; row
+= 2) {
1668 srcPtr
+ (srcWidth
* (row
* 2 + 1)) * bpt
,
1669 srcPtr
+ (srcWidth
* (row
* 2 + 2)) * bpt
,
1670 1, dstPtr
+ (dstWidth
* row
+ 1) * bpt
);
1672 srcPtr
+ (srcWidth
* (row
* 2 + 1) + srcWidth
- 1) * bpt
,
1673 srcPtr
+ (srcWidth
* (row
* 2 + 2) + srcWidth
- 1) * bpt
,
1674 1, dstPtr
+ (dstWidth
* row
+ 1 + dstWidth
- 1) * bpt
);
1682 make_3d_mipmap(const struct gl_texture_format
*format
, GLint border
,
1683 GLint srcWidth
, GLint srcHeight
, GLint srcDepth
,
1684 const GLubyte
*srcPtr
,
1685 GLint dstWidth
, GLint dstHeight
, GLint dstDepth
,
1688 const GLint bpt
= format
->TexelBytes
;
1689 const GLint srcWidthNB
= srcWidth
- 2 * border
; /* sizes w/out border */
1690 const GLint srcDepthNB
= srcDepth
- 2 * border
;
1691 const GLint dstWidthNB
= dstWidth
- 2 * border
;
1692 const GLint dstHeightNB
= dstHeight
- 2 * border
;
1693 const GLint dstDepthNB
= dstDepth
- 2 * border
;
1694 GLvoid
*tmpRowA
, *tmpRowB
;
1696 GLint bytesPerSrcImage
, bytesPerDstImage
;
1697 GLint bytesPerSrcRow
, bytesPerDstRow
;
1698 GLint srcImageOffset
, srcRowOffset
;
1700 (void) srcDepthNB
; /* silence warnings */
1702 /* Need two temporary row buffers */
1703 tmpRowA
= MALLOC(srcWidth
* bpt
);
1706 tmpRowB
= MALLOC(srcWidth
* bpt
);
1712 bytesPerSrcImage
= srcWidth
* srcHeight
* bpt
;
1713 bytesPerDstImage
= dstWidth
* dstHeight
* bpt
;
1715 bytesPerSrcRow
= srcWidth
* bpt
;
1716 bytesPerDstRow
= dstWidth
* bpt
;
1718 /* Offset between adjacent src images to be averaged together */
1719 srcImageOffset
= (srcDepth
== dstDepth
) ? 0 : bytesPerSrcImage
;
1721 /* Offset between adjacent src rows to be averaged together */
1722 srcRowOffset
= (srcHeight
== dstHeight
) ? 0 : srcWidth
* bpt
;
1725 * Need to average together up to 8 src pixels for each dest pixel.
1726 * Break that down into 3 operations:
1727 * 1. take two rows from source image and average them together.
1728 * 2. take two rows from next source image and average them together.
1729 * 3. take the two averaged rows and average them for the final dst row.
1733 _mesa_printf("mip3d %d x %d x %d -> %d x %d x %d\n",
1734 srcWidth, srcHeight, srcDepth, dstWidth, dstHeight, dstDepth);
1737 for (img
= 0; img
< dstDepthNB
; img
++) {
1738 /* first source image pointer, skipping border */
1739 const GLubyte
*imgSrcA
= srcPtr
1740 + (bytesPerSrcImage
+ bytesPerSrcRow
+ border
) * bpt
* border
1741 + img
* (bytesPerSrcImage
+ srcImageOffset
);
1742 /* second source image pointer, skipping border */
1743 const GLubyte
*imgSrcB
= imgSrcA
+ srcImageOffset
;
1744 /* address of the dest image, skipping border */
1745 GLubyte
*imgDst
= dstPtr
1746 + (bytesPerDstImage
+ bytesPerDstRow
+ border
) * bpt
* border
1747 + img
* bytesPerDstImage
;
1749 /* setup the four source row pointers and the dest row pointer */
1750 const GLubyte
*srcImgARowA
= imgSrcA
;
1751 const GLubyte
*srcImgARowB
= imgSrcA
+ srcRowOffset
;
1752 const GLubyte
*srcImgBRowA
= imgSrcB
;
1753 const GLubyte
*srcImgBRowB
= imgSrcB
+ srcRowOffset
;
1754 GLubyte
*dstImgRow
= imgDst
;
1756 for (row
= 0; row
< dstHeightNB
; row
++) {
1757 /* Average together two rows from first src image */
1758 do_row(format
, srcWidthNB
, srcImgARowA
, srcImgARowB
,
1759 srcWidthNB
, tmpRowA
);
1760 /* Average together two rows from second src image */
1761 do_row(format
, srcWidthNB
, srcImgBRowA
, srcImgBRowB
,
1762 srcWidthNB
, tmpRowB
);
1763 /* Average together the temp rows to make the final row */
1764 do_row(format
, srcWidthNB
, tmpRowA
, tmpRowB
,
1765 dstWidthNB
, dstImgRow
);
1766 /* advance to next rows */
1767 srcImgARowA
+= bytesPerSrcRow
+ srcRowOffset
;
1768 srcImgARowB
+= bytesPerSrcRow
+ srcRowOffset
;
1769 srcImgBRowA
+= bytesPerSrcRow
+ srcRowOffset
;
1770 srcImgBRowB
+= bytesPerSrcRow
+ srcRowOffset
;
1771 dstImgRow
+= bytesPerDstRow
;
1778 /* Luckily we can leverage the make_2d_mipmap() function here! */
1780 /* do front border image */
1781 make_2d_mipmap(format
, 1, srcWidth
, srcHeight
, srcPtr
,
1782 dstWidth
, dstHeight
, dstPtr
);
1783 /* do back border image */
1784 make_2d_mipmap(format
, 1, srcWidth
, srcHeight
,
1785 srcPtr
+ bytesPerSrcImage
* (srcDepth
- 1),
1786 dstWidth
, dstHeight
,
1787 dstPtr
+ bytesPerDstImage
* (dstDepth
- 1));
1788 /* do four remaining border edges that span the image slices */
1789 if (srcDepth
== dstDepth
) {
1790 /* just copy border pixels from src to dst */
1791 for (img
= 0; img
< dstDepthNB
; img
++) {
1795 /* do border along [img][row=0][col=0] */
1796 src
= srcPtr
+ (img
+ 1) * bytesPerSrcImage
;
1797 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
;
1798 MEMCPY(dst
, src
, bpt
);
1800 /* do border along [img][row=dstHeight-1][col=0] */
1801 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1802 + (srcHeight
- 1) * bytesPerSrcRow
;
1803 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1804 + (dstHeight
- 1) * bytesPerDstRow
;
1805 MEMCPY(dst
, src
, bpt
);
1807 /* do border along [img][row=0][col=dstWidth-1] */
1808 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1809 + (srcWidth
- 1) * bpt
;
1810 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1811 + (dstWidth
- 1) * bpt
;
1812 MEMCPY(dst
, src
, bpt
);
1814 /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
1815 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1816 + (bytesPerSrcImage
- bpt
);
1817 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1818 + (bytesPerDstImage
- bpt
);
1819 MEMCPY(dst
, src
, bpt
);
1823 /* average border pixels from adjacent src image pairs */
1824 ASSERT(srcDepthNB
== 2 * dstDepthNB
);
1825 for (img
= 0; img
< dstDepthNB
; img
++) {
1829 /* do border along [img][row=0][col=0] */
1830 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
;
1831 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
;
1832 do_row(format
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1834 /* do border along [img][row=dstHeight-1][col=0] */
1835 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1836 + (srcHeight
- 1) * bytesPerSrcRow
;
1837 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1838 + (dstHeight
- 1) * bytesPerDstRow
;
1839 do_row(format
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1841 /* do border along [img][row=0][col=dstWidth-1] */
1842 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1843 + (srcWidth
- 1) * bpt
;
1844 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1845 + (dstWidth
- 1) * bpt
;
1846 do_row(format
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1848 /* do border along [img][row=dstHeight-1][col=dstWidth-1] */
1849 src
= srcPtr
+ (img
* 2 + 1) * bytesPerSrcImage
1850 + (bytesPerSrcImage
- bpt
);
1851 dst
= dstPtr
+ (img
+ 1) * bytesPerDstImage
1852 + (bytesPerDstImage
- bpt
);
1853 do_row(format
, 1, src
, src
+ srcImageOffset
, 1, dst
);
1861 * For GL_SGIX_generate_mipmap:
1862 * Generate a complete set of mipmaps from texObj's base-level image.
1863 * Stop at texObj's MaxLevel or when we get to the 1x1 texture.
1866 _mesa_generate_mipmap(GLcontext
*ctx
, GLenum target
,
1867 const struct gl_texture_unit
*texUnit
,
1868 struct gl_texture_object
*texObj
)
1870 const struct gl_texture_image
*srcImage
;
1871 const struct gl_texture_format
*convertFormat
;
1872 const GLubyte
*srcData
= NULL
;
1873 GLubyte
*dstData
= NULL
;
1874 GLint level
, maxLevels
;
1877 srcImage
= texObj
->Image
[0][texObj
->BaseLevel
];
1880 maxLevels
= _mesa_max_texture_levels(ctx
, texObj
->Target
);
1881 ASSERT(maxLevels
> 0); /* bad target */
1883 /* Find convertFormat - the format that do_row() will process */
1884 if (srcImage
->IsCompressed
) {
1885 /* setup for compressed textures */
1887 GLint components
, size
;
1890 assert(texObj
->Target
== GL_TEXTURE_2D
);
1892 if (srcImage
->Format
== GL_RGB
) {
1893 convertFormat
= &_mesa_texformat_rgb
;
1896 else if (srcImage
->Format
== GL_RGBA
) {
1897 convertFormat
= &_mesa_texformat_rgba
;
1901 _mesa_problem(ctx
, "bad srcImage->Format in _mesa_generate_mipmaps");
1905 /* allocate storage for uncompressed GL_RGB or GL_RGBA images */
1906 size
= _mesa_bytes_per_pixel(srcImage
->Format
, CHAN_TYPE
)
1907 * srcImage
->Width
* srcImage
->Height
* srcImage
->Depth
+ 20;
1908 /* 20 extra bytes, just be safe when calling last FetchTexel */
1909 srcData
= (GLubyte
*) MALLOC(size
);
1911 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generate mipmaps");
1914 dstData
= (GLubyte
*) MALLOC(size
/ 2); /* 1/4 would probably be OK */
1916 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generate mipmaps");
1917 FREE((void *) srcData
);
1921 /* decompress base image here */
1922 dst
= (GLchan
*) srcData
;
1923 for (row
= 0; row
< srcImage
->Height
; row
++) {
1925 for (col
= 0; col
< srcImage
->Width
; col
++) {
1926 srcImage
->FetchTexelc(srcImage
, col
, row
, 0, dst
);
1933 convertFormat
= srcImage
->TexFormat
;
1936 for (level
= texObj
->BaseLevel
; level
< texObj
->MaxLevel
1937 && level
< maxLevels
- 1; level
++) {
1938 /* generate image[level+1] from image[level] */
1939 const struct gl_texture_image
*srcImage
;
1940 struct gl_texture_image
*dstImage
;
1941 GLint srcWidth
, srcHeight
, srcDepth
;
1942 GLint dstWidth
, dstHeight
, dstDepth
;
1943 GLint border
, bytesPerTexel
;
1945 /* get src image parameters */
1946 srcImage
= _mesa_select_tex_image(ctx
, texUnit
, target
, level
);
1948 srcWidth
= srcImage
->Width
;
1949 srcHeight
= srcImage
->Height
;
1950 srcDepth
= srcImage
->Depth
;
1951 border
= srcImage
->Border
;
1953 /* compute next (level+1) image size */
1954 if (srcWidth
- 2 * border
> 1) {
1955 dstWidth
= (srcWidth
- 2 * border
) / 2 + 2 * border
;
1958 dstWidth
= srcWidth
; /* can't go smaller */
1960 if (srcHeight
- 2 * border
> 1) {
1961 dstHeight
= (srcHeight
- 2 * border
) / 2 + 2 * border
;
1964 dstHeight
= srcHeight
; /* can't go smaller */
1966 if (srcDepth
- 2 * border
> 1) {
1967 dstDepth
= (srcDepth
- 2 * border
) / 2 + 2 * border
;
1970 dstDepth
= srcDepth
; /* can't go smaller */
1973 if (dstWidth
== srcWidth
&&
1974 dstHeight
== srcHeight
&&
1975 dstDepth
== srcDepth
) {
1977 if (srcImage
->IsCompressed
) {
1978 FREE((void *) srcData
);
1984 /* get dest gl_texture_image */
1985 dstImage
= _mesa_get_tex_image(ctx
, texUnit
, target
, level
+ 1);
1987 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
1991 /* Free old image data */
1993 MESA_PBUFFER_FREE(dstImage
->Data
);
1995 /* initialize new image */
1996 _mesa_init_teximage_fields(ctx
, target
, dstImage
, dstWidth
, dstHeight
,
1997 dstDepth
, border
, srcImage
->IntFormat
);
1998 dstImage
->DriverData
= NULL
;
1999 dstImage
->TexFormat
= srcImage
->TexFormat
;
2000 dstImage
->FetchTexelc
= srcImage
->FetchTexelc
;
2001 dstImage
->FetchTexelf
= srcImage
->FetchTexelf
;
2002 ASSERT(dstImage
->TexFormat
);
2003 ASSERT(dstImage
->FetchTexelc
);
2004 ASSERT(dstImage
->FetchTexelf
);
2006 /* Alloc new teximage data buffer.
2007 * Setup src and dest data pointers.
2009 if (dstImage
->IsCompressed
) {
2010 ASSERT(dstImage
->CompressedSize
> 0); /* set by init_teximage_fields*/
2011 dstImage
->Data
= MESA_PBUFFER_ALLOC(dstImage
->CompressedSize
);
2012 if (!dstImage
->Data
) {
2013 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
2016 /* srcData and dstData are already set */
2021 bytesPerTexel
= srcImage
->TexFormat
->TexelBytes
;
2022 ASSERT(dstWidth
* dstHeight
* dstDepth
* bytesPerTexel
> 0);
2023 dstImage
->Data
= MESA_PBUFFER_ALLOC(dstWidth
* dstHeight
* dstDepth
2025 if (!dstImage
->Data
) {
2026 _mesa_error(ctx
, GL_OUT_OF_MEMORY
, "generating mipmaps");
2029 srcData
= (const GLubyte
*) srcImage
->Data
;
2030 dstData
= (GLubyte
*) dstImage
->Data
;
2034 * We use simple 2x2 averaging to compute the next mipmap level.
2038 make_1d_mipmap(convertFormat
, border
,
2043 case GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB
:
2044 case GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB
:
2045 case GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB
:
2046 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB
:
2047 case GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB
:
2048 case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB
:
2049 make_2d_mipmap(convertFormat
, border
,
2050 srcWidth
, srcHeight
, srcData
,
2051 dstWidth
, dstHeight
, dstData
);
2054 make_3d_mipmap(convertFormat
, border
,
2055 srcWidth
, srcHeight
, srcDepth
, srcData
,
2056 dstWidth
, dstHeight
, dstDepth
, dstData
);
2058 case GL_TEXTURE_RECTANGLE_NV
:
2059 /* no mipmaps, do nothing */
2062 _mesa_problem(ctx
, "bad dimensions in _mesa_generate_mipmaps");
2066 if (dstImage
->IsCompressed
) {
2068 /* compress image from dstData into dstImage->Data */
2069 const GLenum srcFormat
= convertFormat
->BaseFormat
;
2070 GLint dstRowStride
= _mesa_compressed_row_stride(srcImage
->IntFormat
,
2072 ASSERT(srcFormat
== GL_RGB
|| srcFormat
== GL_RGBA
);
2073 _mesa_compress_teximage(ctx
,
2074 dstWidth
, dstHeight
, /* size */
2075 srcFormat
, /* source format */
2076 (const GLchan
*) dstData
, /* source buffer */
2077 dstWidth
, /* source row stride */
2078 dstImage
->TexFormat
, /* dest format */
2079 (GLubyte
*) dstImage
->Data
, /* dest buffer */
2080 dstRowStride
); /* dest row stride */
2082 /* swap src and dest pointers */
2083 temp
= (GLubyte
*) srcData
;
2088 } /* loop over mipmap levels */