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gsdx-ogl: optimize colclip 0 

Currently colclip uses 2 passes to wrap the output of blending unit

However some blending mode are only a plain copy (of 0 or Cs or Cd).
So no overflow of [0:255], no need to wrap it

Note: I saw those cases in GoW.
This commit is contained in:
Gregory Hainaut 2015-05-17 13:00:28 +02:00
parent 6ced837360
commit 7979dec5b0
1 changed files with 16 additions and 4 deletions
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20
plugins/GSdx/GSRendererOGL.cpp
View File

@ -428,9 +428,21 @@ void GSRendererOGL::DrawPrims(GSTexture* rt, GSTexture* ds, GSTextureCache::Sour
om_dssel.date = 1;
}
if(env.COLCLAMP.CLAMP == 0 && /* hack */ !tex && PRIM->PRIM != GS_POINTLIST)
bool colclip_wrap = env.COLCLAMP.CLAMP == 0 && !tex && PRIM->PRIM != GS_POINTLIST;
if(colclip_wrap)
{
ps_sel.colclip = 1;
#ifdef ENABLE_OGL_DEBUG
const char *col[3] = {"Cs", "Cd", "0"};
#endif
if (context->ALPHA.A == context->ALPHA.B) {
// No addition neither substraction so no risk of overflow the [0:255] range.
GL_INS("Disable COLCLIP wrap: blending is a plain copy of %s", col[context->ALPHA.D]);
colclip_wrap = false;
} else {
GL_INS("Enable COLCLIP wrap (blending is %d/%d/%d/%d)",
context->ALPHA.A, context->ALPHA.B, context->ALPHA.C, context->ALPHA.D);
ps_sel.colclip = 1;
}
}
ps_sel.clr1 = om_bsel.IsCLR1();
@ -626,7 +638,7 @@ void GSRendererOGL::DrawPrims(GSTexture* rt, GSTexture* ds, GSTextureCache::Sour
{
SendDraw(require_barrier);
if (env.COLCLAMP.CLAMP == 0 && !tex && PRIM->PRIM != GS_POINTLIST)
if (colclip_wrap)
{
ASSERT(bogus_blend <= 2);
GL_PUSH("COLCLIP");
@ -686,7 +698,7 @@ void GSRendererOGL::DrawPrims(GSTexture* rt, GSTexture* ds, GSTextureCache::Sour
SendDraw(require_barrier);
if (env.COLCLAMP.CLAMP == 0 && !tex && PRIM->PRIM != GS_POINTLIST)
if (colclip_wrap)
{
ASSERT(bogus_blend <= 2);
GL_PUSH("COLCLIP");