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glamor: Don't need to read dest if op is SRC or CLEAR. 

Signed-off-by: Zhigang Gong <zhigang.gong@gmail.com>
This commit is contained in:
Zhigang Gong 2011-06-26 20:00:26 +08:00 committed by Zhigang Gong
parent b8e692d94e
commit cbedfe7513
1 changed files with 6 additions and 1 deletions
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7
glamor/glamor_render.c
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@ -1084,6 +1084,7 @@ glamor_composite(CARD8 op,
CARD16 height) CARD16 height)
{ {
glamor_composite_rect_t rect; glamor_composite_rect_t rect;
glamor_access_t dest_access;
/* Do two-pass PictOpOver componentAlpha, until we enable /* Do two-pass PictOpOver componentAlpha, until we enable
* dual source color blending. * dual source color blending.
@ -1150,7 +1151,11 @@ glamor_composite(CARD8 op,
glUseProgramObjectARB(0); glUseProgramObjectARB(0);
glDisable(GL_BLEND); glDisable(GL_BLEND);
if (glamor_prepare_access_picture(dest, GLAMOR_ACCESS_RW)) { if (op == PictOpSrc || op == PictOpClear)
dest_access = GLAMOR_ACCESS_WO;
else
dest_access = GLAMOR_ACCESS_RW;
if (glamor_prepare_access_picture(dest, dest_access)) {
if (glamor_prepare_access_picture(source, GLAMOR_ACCESS_RO)) if (glamor_prepare_access_picture(source, GLAMOR_ACCESS_RO))
{ {
if (!mask || if (!mask ||