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implemented GS alpha test emu for gl3

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aap
2020-04-28 14:09:26 +02:00
parent 438397f411
commit a312007893
6 changed files with 107 additions and 19 deletions
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src/gl/gl3device.cpp
+39 -4
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@@ -128,6 +128,7 @@ struct RwStateCache {
uint32 alphaTestEnable;
uint32 alphaFunc;
bool32 textureAlpha;
bool32 blendEnable;
uint32 srcblend, destblend;
uint32 zwrite;
uint32 ztest;
@@ -135,6 +136,11 @@ struct RwStateCache {
uint32 fogEnable;
float32 fogStart;
float32 fogEnd;
// emulation of PS2 GS
bool32 gsalpha;
uint32 gsalpharef;
RwRasterStateCache texstage[MAXNUMSTAGES];
};
static RwStateCache rwStateCache;
@@ -157,6 +163,21 @@ static uint32 blendMap[] = {
GL_SRC_ALPHA_SATURATE,
};
void
setAlphaBlend(bool32 enable)
{
if(rwStateCache.blendEnable != enable){
rwStateCache.blendEnable = enable;
(enable ? glEnable : glDisable)(GL_BLEND);
}
}
bool32
getAlphaBlend(void)
{
return rwStateCache.blendEnable;
}
static void
setDepthTest(bool32 enable)
{
@@ -224,7 +245,7 @@ setVertexAlpha(bool32 enable)
{
if(rwStateCache.vertexAlpha != enable){
if(!rwStateCache.textureAlpha){
(enable ? glEnable : glDisable)(GL_BLEND);
setAlphaBlend(enable);
setAlphaTest(enable);
}
rwStateCache.vertexAlpha = enable;
@@ -343,7 +364,7 @@ setRasterStageOnly(uint32 stage, Raster *raster)
if(alpha != rwStateCache.textureAlpha){
rwStateCache.textureAlpha = alpha;
if(!rwStateCache.vertexAlpha){
(alpha ? glEnable : glDisable)(GL_BLEND);
setAlphaBlend(alpha);
setAlphaTest(alpha);
}
}
@@ -392,7 +413,7 @@ setRasterStage(uint32 stage, Raster *raster)
if(alpha != rwStateCache.textureAlpha){
rwStateCache.textureAlpha = alpha;
if(!rwStateCache.vertexAlpha){
(alpha ? glEnable : glDisable)(GL_BLEND);
setAlphaBlend(alpha);
setAlphaTest(alpha);
}
}
@@ -492,6 +513,11 @@ setRenderState(int32 state, void *pvalue)
stateDirty = 1;
}
break;
case GSALPHATEST:
rwStateCache.gsalpha = value;
break;
case GSALPHATESTREF:
rwStateCache.gsalpharef = value;
}
}
@@ -551,6 +577,12 @@ getRenderState(int32 state)
case ALPHATESTREF:
val = (uint32)(uniformState.alphaRef*255.0f);
break;
case GSALPHATEST:
val = rwStateCache.gsalpha;
break;
case GSALPHATESTREF:
val = rwStateCache.gsalpharef;
break;
default:
val = 0;
}
@@ -568,13 +600,16 @@ resetRenderState(void)
uniformState.fogEnd = 0.0f;
uniformState.fogRange = 0.0f;
uniformState.fogColor = { 1.0f, 1.0f, 1.0f, 1.0f };
rwStateCache.gsalpha = 0;
rwStateCache.gsalpharef = 128;
stateDirty = 1;
rwStateCache.vertexAlpha = 0;
rwStateCache.textureAlpha = 0;
glDisable(GL_BLEND);
rwStateCache.alphaTestEnable = 0;
rwStateCache.blendEnable = 0;
glDisable(GL_BLEND);
rwStateCache.srcblend = BLENDSRCALPHA;
rwStateCache.destblend = BLENDINVSRCALPHA;
glBlendFunc(blendMap[rwStateCache.srcblend], blendMap[rwStateCache.destblend]);