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nvfx: new 2D: use a CPU copy for up to 4 pixels, up from 0

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Seems a reasonable threshold for now.

Significantly speeds up Piglit's 1x1 glReadPixels (but, you know,
reading pixels in 1x1 blocks is NOT a good idea, especially if you
might be running on a less-than-perfect driver).
This commit is contained in:
Luca Barbieri
2010-04-18 16:43:19 +02:00
parent 28eb392a85
commit 0481ed25c9
1 changed files with 1 additions and 5 deletions
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src/gallium/drivers/nvfx/nvfx_surface.c
+1 -5
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@@ -250,11 +250,7 @@ nvfx_resource_copy_region(struct pipe_context *pipe,
static int copy_threshold = -1;
if(copy_threshold < 0)
{
copy_threshold = debug_get_num_option("NOUVEAU_COPY_THRESHOLD", 0);
if(copy_threshold < 0)
copy_threshold = 0;
}
copy_threshold = debug_get_num_option("NOUVEAU_COPY_THRESHOLD", 4);
int dst_to_gpu = dstr->usage != PIPE_USAGE_DYNAMIC && dstr->usage != PIPE_USAGE_STAGING;
int src_on_gpu = nvfx_resource_on_gpu(srcr);