2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 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.
26 #include "main/glheader.h"
27 #include "main/bufferobj.h"
28 #include "main/condrender.h"
29 #include "main/context.h"
30 #include "main/convolve.h"
31 #include "main/image.h"
32 #include "main/macros.h"
33 #include "main/imports.h"
34 #include "main/state.h"
36 #include "s_context.h"
38 #include "s_stencil.h"
44 * Try to do a fast and simple RGB(a) glDrawPixels.
45 * Return: GL_TRUE if success, GL_FALSE if slow path must be used instead
48 fast_draw_rgba_pixels(GLcontext *ctx, GLint x, GLint y,
49 GLsizei width, GLsizei height,
50 GLenum format, GLenum type,
51 const struct gl_pixelstore_attrib *userUnpack,
54 const GLint imgX = x, imgY = y;
55 struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0];
57 SWcontext *swrast = SWRAST_CONTEXT(ctx);
60 GLint yStep; /* +1 or -1 */
61 struct gl_pixelstore_attrib unpack;
62 GLint destX, destY, drawWidth, drawHeight; /* post clipping */
65 return GL_TRUE; /* no-op */
67 rbType = rb->DataType;
69 if ((swrast->_RasterMask & ~CLIP_BIT) ||
70 ctx->Texture._EnabledCoordUnits ||
71 userUnpack->SwapBytes ||
72 ctx->_ImageTransferState) {
73 /* can't handle any of those conditions */
77 INIT_SPAN(span, GL_BITMAP);
78 span.arrayMask = SPAN_RGBA;
79 span.arrayAttribs = FRAG_BIT_COL0;
80 _swrast_span_default_attribs(ctx, &span);
82 /* copy input params since clipping may change them */
89 /* check for simple zooming and clipping */
90 if (ctx->Pixel.ZoomX == 1.0F &&
91 (ctx->Pixel.ZoomY == 1.0F || ctx->Pixel.ZoomY == -1.0F)) {
92 if (!_mesa_clip_drawpixels(ctx, &destX, &destY,
93 &drawWidth, &drawHeight, &unpack)) {
94 /* image was completely clipped: no-op, all done */
98 yStep = (GLint) ctx->Pixel.ZoomY;
99 ASSERT(yStep == 1 || yStep == -1);
102 /* non-simple zooming */
103 simpleZoom = GL_FALSE;
105 if (unpack.RowLength == 0)
106 unpack.RowLength = width;
113 if (format == GL_RGBA && type == rbType) {
115 = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width,
116 height, format, type, 0, 0);
117 const GLint srcStride = _mesa_image_row_stride(&unpack, width,
121 for (row = 0; row < drawHeight; row++) {
122 rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL);
130 for (row = 0; row < drawHeight; row++) {
132 span.y = destY + row;
133 span.end = drawWidth;
134 span.array->ChanType = rbType;
135 _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, src);
138 span.array->ChanType = CHAN_TYPE;
143 if (format == GL_RGB && type == rbType) {
145 = (const GLubyte *) _mesa_image_address2d(&unpack, pixels, width,
146 height, format, type, 0, 0);
147 const GLint srcStride = _mesa_image_row_stride(&unpack, width,
151 for (row = 0; row < drawHeight; row++) {
152 rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL);
160 for (row = 0; row < drawHeight; row++) {
163 span.end = drawWidth;
164 span.array->ChanType = rbType;
165 _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, src);
169 span.array->ChanType = CHAN_TYPE;
174 /* Remaining cases haven't been tested with alignment != 1 */
175 if (userUnpack->Alignment != 1)
178 if (format == GL_LUMINANCE && type == CHAN_TYPE && rbType == CHAN_TYPE) {
179 const GLchan *src = (const GLchan *) pixels
180 + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels);
184 ASSERT(drawWidth <= MAX_WIDTH);
185 for (row = 0; row < drawHeight; row++) {
186 GLchan rgb[MAX_WIDTH][3];
188 for (i = 0;i<drawWidth;i++) {
193 rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, rgb, NULL);
194 src += unpack.RowLength;
201 ASSERT(drawWidth <= MAX_WIDTH);
202 for (row = 0; row < drawHeight; row++) {
203 GLchan rgb[MAX_WIDTH][3];
205 for (i = 0;i<drawWidth;i++) {
212 span.end = drawWidth;
213 _swrast_write_zoomed_rgb_span(ctx, imgX, imgY, &span, rgb);
214 src += unpack.RowLength;
221 if (format == GL_LUMINANCE_ALPHA && type == CHAN_TYPE && rbType == CHAN_TYPE) {
222 const GLchan *src = (const GLchan *) pixels
223 + (unpack.SkipRows * unpack.RowLength + unpack.SkipPixels)*2;
226 ASSERT(drawWidth <= MAX_WIDTH);
227 for (row = 0; row < drawHeight; row++) {
229 const GLchan *ptr = src;
230 for (i = 0;i<drawWidth;i++) {
231 span.array->rgba[i][0] = *ptr;
232 span.array->rgba[i][1] = *ptr;
233 span.array->rgba[i][2] = *ptr++;
234 span.array->rgba[i][3] = *ptr++;
236 rb->PutRow(ctx, rb, drawWidth, destX, destY,
237 span.array->rgba, NULL);
238 src += unpack.RowLength*2;
245 ASSERT(drawWidth <= MAX_WIDTH);
246 for (row = 0; row < drawHeight; row++) {
247 const GLchan *ptr = src;
249 for (i = 0;i<drawWidth;i++) {
250 span.array->rgba[i][0] = *ptr;
251 span.array->rgba[i][1] = *ptr;
252 span.array->rgba[i][2] = *ptr++;
253 span.array->rgba[i][3] = *ptr++;
257 span.end = drawWidth;
258 _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
260 src += unpack.RowLength*2;
267 if (format == GL_COLOR_INDEX && type == GL_UNSIGNED_BYTE) {
268 const GLubyte *src = (const GLubyte *) pixels
269 + unpack.SkipRows * unpack.RowLength + unpack.SkipPixels;
270 if (rbType == GL_UNSIGNED_BYTE) {
271 /* convert ubyte/CI data to ubyte/RGBA */
274 for (row = 0; row < drawHeight; row++) {
275 ASSERT(drawWidth <= MAX_WIDTH);
276 _mesa_map_ci8_to_rgba8(ctx, drawWidth, src,
278 rb->PutRow(ctx, rb, drawWidth, destX, destY,
279 span.array->rgba8, NULL);
280 src += unpack.RowLength;
285 /* ubyte/CI to ubyte/RGBA with zooming */
287 for (row = 0; row < drawHeight; row++) {
288 ASSERT(drawWidth <= MAX_WIDTH);
289 _mesa_map_ci8_to_rgba8(ctx, drawWidth, src,
293 span.end = drawWidth;
294 _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span,
296 src += unpack.RowLength;
304 /* can't handle this pixel format and/or data type */
311 * Draw stencil image.
314 draw_stencil_pixels( GLcontext *ctx, GLint x, GLint y,
315 GLsizei width, GLsizei height,
317 const struct gl_pixelstore_attrib *unpack,
318 const GLvoid *pixels )
320 const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
323 /* if width > MAX_WIDTH, have to process image in chunks */
325 while (skipPixels < width) {
326 const GLint spanX = x + skipPixels;
327 const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
329 for (row = 0; row < height; row++) {
330 const GLint spanY = y + row;
331 GLstencil values[MAX_WIDTH];
332 GLenum destType = (sizeof(GLstencil) == sizeof(GLubyte))
333 ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
334 const GLvoid *source = _mesa_image_address2d(unpack, pixels,
336 GL_COLOR_INDEX, type,
338 _mesa_unpack_stencil_span(ctx, spanWidth, destType, values,
339 type, source, unpack,
340 ctx->_ImageTransferState);
342 _swrast_write_zoomed_stencil_span(ctx, x, y, spanWidth,
343 spanX, spanY, values);
346 _swrast_write_stencil_span(ctx, spanWidth, spanX, spanY, values);
349 skipPixels += spanWidth;
358 draw_depth_pixels( GLcontext *ctx, GLint x, GLint y,
359 GLsizei width, GLsizei height,
361 const struct gl_pixelstore_attrib *unpack,
362 const GLvoid *pixels )
364 const GLboolean scaleOrBias
365 = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
366 const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
369 INIT_SPAN(span, GL_BITMAP);
370 span.arrayMask = SPAN_Z;
371 _swrast_span_default_attribs(ctx, &span);
373 if (type == GL_UNSIGNED_SHORT
374 && ctx->DrawBuffer->Visual.depthBits == 16
377 && width <= MAX_WIDTH
378 && !unpack->SwapBytes) {
379 /* Special case: directly write 16-bit depth values */
381 for (row = 0; row < height; row++) {
382 const GLushort *zSrc = (const GLushort *)
383 _mesa_image_address2d(unpack, pixels, width, height,
384 GL_DEPTH_COMPONENT, type, row, 0);
386 for (i = 0; i < width; i++)
387 span.array->z[i] = zSrc[i];
391 _swrast_write_rgba_span(ctx, &span);
394 else if (type == GL_UNSIGNED_INT
397 && width <= MAX_WIDTH
398 && !unpack->SwapBytes) {
399 /* Special case: shift 32-bit values down to Visual.depthBits */
400 const GLint shift = 32 - ctx->DrawBuffer->Visual.depthBits;
402 for (row = 0; row < height; row++) {
403 const GLuint *zSrc = (const GLuint *)
404 _mesa_image_address2d(unpack, pixels, width, height,
405 GL_DEPTH_COMPONENT, type, row, 0);
407 memcpy(span.array->z, zSrc, width * sizeof(GLuint));
411 for (col = 0; col < width; col++)
412 span.array->z[col] = zSrc[col] >> shift;
417 _swrast_write_rgba_span(ctx, &span);
422 const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
423 GLint skipPixels = 0;
425 /* in case width > MAX_WIDTH do the copy in chunks */
426 while (skipPixels < width) {
427 const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
429 ASSERT(span.end <= MAX_WIDTH);
430 for (row = 0; row < height; row++) {
431 const GLvoid *zSrc = _mesa_image_address2d(unpack,
432 pixels, width, height,
433 GL_DEPTH_COMPONENT, type,
436 /* Set these for each row since the _swrast_write_* function may
437 * change them while clipping.
439 span.x = x + skipPixels;
441 span.end = spanWidth;
443 _mesa_unpack_depth_span(ctx, spanWidth,
444 GL_UNSIGNED_INT, span.array->z, depthMax,
447 _swrast_write_zoomed_depth_span(ctx, x, y, &span);
450 _swrast_write_rgba_span(ctx, &span);
453 skipPixels += spanWidth;
464 draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
465 GLsizei width, GLsizei height,
466 GLenum format, GLenum type,
467 const struct gl_pixelstore_attrib *unpack,
468 const GLvoid *pixels )
470 const GLint imgX = x, imgY = y;
471 const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
472 GLfloat *convImage = NULL;
473 GLbitfield transferOps = ctx->_ImageTransferState;
476 /* Try an optimized glDrawPixels first */
477 if (fast_draw_rgba_pixels(ctx, x, y, width, height, format, type,
482 INIT_SPAN(span, GL_BITMAP);
483 _swrast_span_default_attribs(ctx, &span);
484 span.arrayMask = SPAN_RGBA;
485 span.arrayAttribs = FRAG_BIT_COL0; /* we're fill in COL0 attrib values */
487 if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
488 /* Convolution has to be handled specially. We'll create an
489 * intermediate image, applying all pixel transfer operations
490 * up to convolution. Then we'll convolve the image. Then
491 * we'll proceed with the rest of the transfer operations and
492 * rasterize the image.
495 GLfloat *dest, *tmpImage;
497 tmpImage = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
499 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
502 convImage = (GLfloat *) malloc(width * height * 4 * sizeof(GLfloat));
505 _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
509 /* Unpack the image and apply transfer ops up to convolution */
511 for (row = 0; row < height; row++) {
512 const GLvoid *source = _mesa_image_address2d(unpack,
513 pixels, width, height, format, type, row, 0);
514 _mesa_unpack_color_span_float(ctx, width, GL_RGBA, (GLfloat *) dest,
515 format, type, source, unpack,
516 transferOps & IMAGE_PRE_CONVOLUTION_BITS);
521 if (ctx->Pixel.Convolution2DEnabled) {
522 _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage);
525 ASSERT(ctx->Pixel.Separable2DEnabled);
526 _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage);
530 /* continue transfer ops and draw the convolved image */
531 unpack = &ctx->DefaultPacking;
535 transferOps &= IMAGE_POST_CONVOLUTION_BITS;
537 else if (ctx->Pixel.Convolution1DEnabled) {
538 /* we only want to apply 1D convolution to glTexImage1D */
539 transferOps &= ~(IMAGE_CONVOLUTION_BIT |
540 IMAGE_POST_CONVOLUTION_SCALE_BIAS);
543 if (ctx->DrawBuffer->_NumColorDrawBuffers > 0 &&
544 ctx->DrawBuffer->_ColorDrawBuffers[0]->DataType != GL_FLOAT &&
545 ctx->Color.ClampFragmentColor != GL_FALSE) {
546 /* need to clamp colors before applying fragment ops */
547 transferOps |= IMAGE_CLAMP_BIT;
554 const GLboolean sink = (ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink)
555 || (ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink);
556 const GLbitfield interpMask = span.interpMask;
557 const GLbitfield arrayMask = span.arrayMask;
558 const GLint srcStride
559 = _mesa_image_row_stride(unpack, width, format, type);
560 GLint skipPixels = 0;
561 /* use span array for temp color storage */
562 GLfloat *rgba = (GLfloat *) span.array->attribs[FRAG_ATTRIB_COL0];
564 /* if the span is wider than MAX_WIDTH we have to do it in chunks */
565 while (skipPixels < width) {
566 const GLint spanWidth = MIN2(width - skipPixels, MAX_WIDTH);
567 const GLubyte *source
568 = (const GLubyte *) _mesa_image_address2d(unpack, pixels,
569 width, height, format,
570 type, 0, skipPixels);
573 for (row = 0; row < height; row++) {
574 /* get image row as float/RGBA */
575 _mesa_unpack_color_span_float(ctx, spanWidth, GL_RGBA, rgba,
576 format, type, source, unpack,
580 /* Set these for each row since the _swrast_write_* functions
581 * may change them while clipping/rendering.
583 span.array->ChanType = GL_FLOAT;
584 span.x = x + skipPixels;
586 span.end = spanWidth;
587 span.arrayMask = arrayMask;
588 span.interpMask = interpMask;
590 _swrast_write_zoomed_rgba_span(ctx, imgX, imgY, &span, rgba);
593 _swrast_write_rgba_span(ctx, &span);
600 skipPixels += spanWidth;
601 } /* while skipPixels < width */
603 /* XXX this is ugly/temporary, to undo above change */
604 span.array->ChanType = CHAN_TYPE;
614 * This is a bit different from drawing GL_DEPTH_COMPONENT pixels.
615 * The only per-pixel operations that apply are depth scale/bias,
616 * stencil offset/shift, GL_DEPTH_WRITEMASK and GL_STENCIL_WRITEMASK,
618 * Also, only the depth buffer and stencil buffers are touched, not the
622 draw_depth_stencil_pixels(GLcontext *ctx, GLint x, GLint y,
623 GLsizei width, GLsizei height, GLenum type,
624 const struct gl_pixelstore_attrib *unpack,
625 const GLvoid *pixels)
627 const GLint imgX = x, imgY = y;
628 const GLboolean scaleOrBias
629 = ctx->Pixel.DepthScale != 1.0 || ctx->Pixel.DepthBias != 0.0;
630 const GLuint depthMax = ctx->DrawBuffer->_DepthMax;
631 const GLuint stencilMask = ctx->Stencil.WriteMask[0];
632 const GLuint stencilType = (STENCIL_BITS == 8) ?
633 GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
634 const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
635 struct gl_renderbuffer *depthRb, *stencilRb;
636 struct gl_pixelstore_attrib clippedUnpack = *unpack;
639 if (!_mesa_clip_drawpixels(ctx, &x, &y, &width, &height,
641 /* totally clipped */
646 depthRb = ctx->ReadBuffer->Attachment[BUFFER_DEPTH].Renderbuffer;
647 stencilRb = ctx->ReadBuffer->Attachment[BUFFER_STENCIL].Renderbuffer;
651 if (depthRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
652 stencilRb->_BaseFormat == GL_DEPTH_STENCIL_EXT &&
653 depthRb == stencilRb &&
657 (stencilMask & 0xff) == 0xff) {
658 /* This is the ideal case.
659 * Drawing GL_DEPTH_STENCIL pixels into a combined depth/stencil buffer.
660 * Plus, no pixel transfer ops, zooming, or masking needed.
663 for (i = 0; i < height; i++) {
664 const GLuint *src = (const GLuint *)
665 _mesa_image_address2d(&clippedUnpack, pixels, width, height,
666 GL_DEPTH_STENCIL_EXT, type, i, 0);
667 depthRb->PutRow(ctx, depthRb, width, x, y + i, src, NULL);
671 /* sub-optimal cases:
672 * Separate depth/stencil buffers, or pixel transfer ops required.
674 /* XXX need to handle very wide images (skippixels) */
677 depthRb = ctx->DrawBuffer->_DepthBuffer;
678 stencilRb = ctx->DrawBuffer->_StencilBuffer;
680 for (i = 0; i < height; i++) {
681 const GLuint *depthStencilSrc = (const GLuint *)
682 _mesa_image_address2d(&clippedUnpack, pixels, width, height,
683 GL_DEPTH_STENCIL_EXT, type, i, 0);
685 if (ctx->Depth.Mask) {
686 if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 24) {
687 /* fast path 24-bit zbuffer */
688 GLuint zValues[MAX_WIDTH];
690 ASSERT(depthRb->DataType == GL_UNSIGNED_INT);
691 for (j = 0; j < width; j++) {
692 zValues[j] = depthStencilSrc[j] >> 8;
695 _swrast_write_zoomed_z_span(ctx, imgX, imgY, width,
698 depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
700 else if (!scaleOrBias && ctx->DrawBuffer->Visual.depthBits == 16) {
701 /* fast path 16-bit zbuffer */
702 GLushort zValues[MAX_WIDTH];
704 ASSERT(depthRb->DataType == GL_UNSIGNED_SHORT);
705 for (j = 0; j < width; j++) {
706 zValues[j] = depthStencilSrc[j] >> 16;
709 _swrast_write_zoomed_z_span(ctx, imgX, imgY, width,
712 depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
716 GLuint zValues[MAX_WIDTH]; /* 16 or 32-bit Z value storage */
717 _mesa_unpack_depth_span(ctx, width,
718 depthRb->DataType, zValues, depthMax,
719 type, depthStencilSrc, &clippedUnpack);
721 _swrast_write_zoomed_z_span(ctx, imgX, imgY, width, x,
725 depthRb->PutRow(ctx, depthRb, width, x, y + i, zValues,NULL);
730 if (stencilMask != 0x0) {
731 GLstencil stencilValues[MAX_WIDTH];
732 /* get stencil values, with shift/offset/mapping */
733 _mesa_unpack_stencil_span(ctx, width, stencilType, stencilValues,
734 type, depthStencilSrc, &clippedUnpack,
735 ctx->_ImageTransferState);
737 _swrast_write_zoomed_stencil_span(ctx, imgX, imgY, width,
738 x, y + i, stencilValues);
740 _swrast_write_stencil_span(ctx, width, x, y + i, stencilValues);
748 * Execute software-based glDrawPixels.
749 * By time we get here, all error checking will have been done.
752 _swrast_DrawPixels( GLcontext *ctx,
754 GLsizei width, GLsizei height,
755 GLenum format, GLenum type,
756 const struct gl_pixelstore_attrib *unpack,
757 const GLvoid *pixels )
759 SWcontext *swrast = SWRAST_CONTEXT(ctx);
760 GLboolean save_vp_override = ctx->VertexProgram._Overriden;
762 if (!_mesa_check_conditional_render(ctx))
763 return; /* don't draw */
765 /* We are creating fragments directly, without going through vertex
768 * This override flag tells the fragment processing code that its input
769 * comes from a non-standard source, and it may therefore not rely on
770 * optimizations that assume e.g. constant color if there is no color
773 _mesa_set_vp_override(ctx, GL_TRUE);
775 swrast_render_start(ctx);
778 _mesa_update_state(ctx);
780 if (swrast->NewState)
781 _swrast_validate_derived( ctx );
783 pixels = _mesa_map_pbo_source(ctx, unpack, pixels);
785 swrast_render_finish(ctx);
786 _mesa_set_vp_override(ctx, save_vp_override);
791 case GL_STENCIL_INDEX:
792 draw_stencil_pixels( ctx, x, y, width, height, type, unpack, pixels );
794 case GL_DEPTH_COMPONENT:
795 draw_depth_pixels( ctx, x, y, width, height, type, unpack, pixels );
803 case GL_LUMINANCE_ALPHA:
809 draw_rgba_pixels(ctx, x, y, width, height, format, type, unpack, pixels);
811 case GL_DEPTH_STENCIL_EXT:
812 draw_depth_stencil_pixels(ctx, x, y, width, height,
813 type, unpack, pixels);
816 _mesa_problem(ctx, "unexpected format in _swrast_DrawPixels");
817 /* don't return yet, clean-up */
820 swrast_render_finish(ctx);
821 _mesa_set_vp_override(ctx, save_vp_override);
823 _mesa_unmap_pbo_source(ctx, unpack);