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st/dri: resolve sRGB buffers in linear colorspace

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Reviewed-by: Brian Paul <brianp@vmware.com>
This commit is contained in:
Marek Olšák 2013-12-10 17:46:41 +01:00
parent 27d47bd42f
commit 072c5d0573
1 changed files with 23 additions and 2 deletions
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25
src/gallium/state_trackers/dri/common/dri_drawable.c
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@ -371,17 +371,38 @@ dri_pipe_blit(struct pipe_context *pipe,
if (!dst || !src)
return;
/* From the GL spec, version 4.2, section 4.1.11 (Additional Multisample
* Fragment Operations):
*
* If a framebuffer object is not bound, after all operations have
* been completed on the multisample buffer, the sample values for
* each color in the multisample buffer are combined to produce a
* single color value, and that value is written into the
* corresponding color buffers selected by DrawBuffer or
* DrawBuffers. An implementation may defer the writing of the color
* buffers until a later time, but the state of the framebuffer must
* behave as if the color buffers were updated as each fragment was
* processed. The method of combination is not specified. If the
* framebuffer contains sRGB values, then it is recommended that the
* an average of sample values is computed in a linearized space, as
* for blending (see section 4.1.7).
*
* In other words, to do a resolve operation in a linear space, we have
* to set sRGB formats if the original resources were sRGB, so don't use
* util_format_linear.
*/
memset(&blit, 0, sizeof(blit));
blit.dst.resource = dst;
blit.dst.box.width = dst->width0;
blit.dst.box.height = dst->height0;
blit.dst.box.depth = 1;
blit.dst.format = util_format_linear(dst->format);
blit.dst.format = dst->format;
blit.src.resource = src;
blit.src.box.width = src->width0;
blit.src.box.height = src->height0;
blit.src.box.depth = 1;
blit.src.format = util_format_linear(src->format);
blit.src.format = src->format;
blit.mask = PIPE_MASK_RGBA;
blit.filter = PIPE_TEX_FILTER_NEAREST;