svga: convert dst format to linear when blending is enabled.

When blending is enabled, framebuffer colorspace has to be linear.
Previously, we never hit this case because we were not supporting sRGB
drawable. Previous patch added that support.

Tested with mtt glretrace, viewperf, piglit, conform.

Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Charmaine Lee <charmainel@vmware.com>

diff --git a/src/gallium/drivers/svga/svga_pipe_blit.c b/src/gallium/drivers/svga/svga_pipe_blit.c
index bca0de3..d97f623 100644 (file)
--- a/src/gallium/drivers/svga/svga_pipe_blit.c
+++ b/src/gallium/drivers/svga/svga_pipe_blit.c
@@ -597,8 +597,10 @@ try_blit(struct svga_context *svga, const struct pipe_blit_info *blit_info)
     * If format is srgb and blend is enabled then color values need
     * to be converted into linear format.
     */
-   if (is_blending_enabled(svga, &blit))
+   if (is_blending_enabled(svga, &blit)) {
       blit.src.format = util_format_linear(blit.src.format);
+      blit.dst.format = util_format_linear(blit.dst.format);
+   }
 
    /* Check if we can create shader resource view and
     * render target view for the quad blitter to work