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Support NEVER alpha/color tests.

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This commit is contained in:
Unknown W. Brackets 2014-06-13 23:07:07 -07:00
parent 9e97206c5f
commit 444128dcdd
1 changed files with 8 additions and 2 deletions
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10
GPU/GLES/FragmentShaderGenerator.cpp
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@ -706,7 +706,7 @@ void GenerateFragmentShader(char *buffer) {
if (enableAlphaTest) {
GEComparison alphaTestFunc = gstate.getAlphaTestFunction();
const char *alphaTestFuncs[] = { "#", "#", " != ", " == ", " >= ", " > ", " <= ", " < " }; // never/always don't make sense
const char *alphaTestFuncs[] = { "#", "#", " != ", " == ", " >= ", " > ", " <= ", " < " };
if (alphaTestFuncs[alphaTestFunc][0] != '#') {
if (alphaTestAgainstZero) {
// When testing against 0 (extremely common), we can avoid some math.
@ -724,18 +724,24 @@ void GenerateFragmentShader(char *buffer) {
} else {
WRITE(p, " if (roundAndScaleTo255f(v.a) %s u_alphacolorref.a) discard;\n", alphaTestFuncs[alphaTestFunc]);
}
} else {
// NEVER has been logged as used by games, although it makes little sense - statically failing.
// Maybe we could discard the drawcall, but it's pretty rare. Let's just statically discard here.
WRITE(p, " discard;\n");
}
}
if (enableColorTest) {
GEComparison colorTestFunc = gstate.getColorTestFunction();
const char *colorTestFuncs[] = { "#", "#", " != ", " == " }; // never/always don't make sense
const char *colorTestFuncs[] = { "#", "#", " != ", " == " };
u32 colorTestMask = gstate.getColorTestMask();
if (colorTestFuncs[colorTestFunc][0] != '#') {
if (gl_extensions.gpuVendor == GPU_VENDOR_POWERVR)
WRITE(p, " if (roundTo255thv(v.rgb) %s u_alphacolorref.rgb) discard;\n", colorTestFuncs[colorTestFunc]);
else
WRITE(p, " if (roundAndScaleTo255v(v.rgb) %s u_alphacolorref.rgb) discard;\n", colorTestFuncs[colorTestFunc]);
} else {
WRITE(p, " discard;\n");
}
}