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util: replace format equality test with compatibility test in blit code

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This lets us use the resource_copy_region() path when blitting from
R8G8B8A8 to R8G8B8x8, for example.

v2: be smarter when src_format==dst_format

Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: José Fonseca <jfonseca@vmware.com>
This commit is contained in:
Brian Paul 2012-02-28 07:48:34 -07:00
parent ce671c7ace
commit 7f9692b97d
1 changed files with 21 additions and 1 deletions
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22
src/gallium/auxiliary/util/u_blit.c
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@ -320,6 +320,26 @@ regions_overlap(int srcX0, int srcY0,
}
/**
* Can we blit from src format to dest format with a simple copy?
*/
static boolean
formats_compatible(enum pipe_format src_format,
enum pipe_format dst_format)
{
if (src_format == dst_format) {
return TRUE;
}
else {
const struct util_format_description *src_desc =
util_format_description(src_format);
const struct util_format_description *dst_desc =
util_format_description(dst_format);
return util_is_format_compatible(src_desc, dst_desc);
}
}
/**
* Copy pixel block from src surface to dst surface.
* Overlapping regions are acceptable.
@ -377,7 +397,7 @@ util_blit_pixels_writemask(struct blit_state *ctx,
* no overlapping.
* Filter mode should not matter since there's no stretching.
*/
if (dst_format == src_format &&
if (formats_compatible(src_format, dst_format) &&
srcX0 < srcX1 &&
dstX0 < dstX1 &&
srcY0 < srcY1 &&