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desmume
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Added support for the polygon ID shit, using the stencil buffer. 

I also changed the values used when rendering opaque polygons or shadows, so they don't interfer with the translucent polygons.
We can now close the bug report #2488334 for good!
This commit is contained in:
luigi__ 2009-02-07 14:18:51 +00:00
parent cb70fb5af6
commit 1029997586
1 changed files with 15 additions and 4 deletions
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19
desmume/src/OGLRender.cpp
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@ -134,6 +134,7 @@ OGLEXT(PFNGLVALIDATEPROGRAMPROC,glValidateProgram)
OGLEXT(PFNGLBLENDFUNCSEPARATEEXTPROC,glBlendFuncSeparateEXT)
OGLEXT(PFNGLGETUNIFORMLOCATIONPROC,glGetUniformLocation)
OGLEXT(PFNGLUNIFORM1IPROC,glUniform1i)
OGLEXT(PFNGLUNIFORM1IVPROC,glUniform1iv)
#endif
#if !defined(GL_VERSION_1_3) || defined(_MSC_VER) || defined(__INTEL_COMPILER)
@ -421,6 +422,7 @@ static char OGLInit(void)
#endif
INITOGLEXT(PFNGLGETUNIFORMLOCATIONPROC,glGetUniformLocation)
INITOGLEXT(PFNGLUNIFORM1IPROC,glUniform1i)
INITOGLEXT(PFNGLUNIFORM1IVPROC,glUniform1iv)
#endif
#if !defined(GL_VERSION_1_3) || defined(_MSC_VER) || defined(__INTEL_COMPILER)
INITOGLEXT(PFNGLACTIVETEXTUREPROC,glActiveTexture)
@ -578,7 +580,7 @@ static void BeginRenderPoly()
//when the polyID is zero, we are writing the shadow mask.
//set stencilbuf = 1 where the shadow volume is obstructed by geometry.
//do not write color or depth information.
glStencilFunc(GL_ALWAYS,2,255);
glStencilFunc(GL_ALWAYS,65,255);
glStencilOp(GL_KEEP,GL_REPLACE,GL_KEEP);
glColorMask(GL_FALSE,GL_FALSE,GL_FALSE,GL_FALSE);
}
@ -589,16 +591,24 @@ static void BeginRenderPoly()
//when the polyid is nonzero, we are drawing the shadow poly.
//only draw the shadow poly where the stencilbuf==1.
//I am not sure whether to update the depth buffer here--so I chose not to.
glStencilFunc(GL_EQUAL,2,255);
glStencilFunc(GL_EQUAL,65,255);
glStencilOp(GL_KEEP,GL_KEEP,GL_KEEP);
glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE);
}
}
} else {
xglEnable(GL_STENCIL_TEST);
if(isTranslucent)
{
stencilStateSet = 3;
glStencilFunc(GL_NOTEQUAL,polyID,255);
glStencilOp(GL_KEEP,GL_KEEP,GL_REPLACE);
glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE);
}
else
if(stencilStateSet!=2) {
stencilStateSet=2;
glStencilFunc(GL_ALWAYS,1,255);
stencilStateSet=2;
glStencilFunc(GL_ALWAYS,64,255);
glStencilOp(GL_REPLACE,GL_REPLACE,GL_REPLACE);
glColorMask(GL_TRUE,GL_TRUE,GL_TRUE,GL_TRUE);
}
@ -693,6 +703,7 @@ static void OGLRender()
};
glClearColor(clearColor[0],clearColor[1],clearColor[2],clearColor[3]);
glClearDepth(gfx3d.clearDepth);
glClearStencil((gfx3d.clearColor >> 24) & 0x3F);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT);
glMatrixMode(GL_PROJECTION);