Compiler - implement gl_FrontFacing
TRAC #11368
Signed-off-by: Andrew Lewycky
Signed-off-by: Daniel Koch
From: Nicolas Capens <nicolas@transgaming.com>
git-svn-id: https://angleproject.googlecode.com/svn/trunk@22 736b8ea6-26fd-11df-bfd4-992fa37f6226
diff --git a/Compiler/OutputHLSL.cpp b/Compiler/OutputHLSL.cpp
index ef5c7a4..3fbdb27 100644
--- a/Compiler/OutputHLSL.cpp
+++ b/Compiler/OutputHLSL.cpp
@@ -58,13 +58,15 @@
out << "uniform float4 gl_Window;\n"
"uniform float2 gl_Depth;\n"
+ "uniform bool __frontCCW;\n"
"\n";
out << uniforms;
out << "\n"
"struct PS_INPUT\n" // FIXME: Prevent name clashes
"{\n";
out << varyingInput;
- out << " float4 gl_FragCoord : TEXCOORD" << HLSL_FRAG_COORD_SEMANTIC << ";\n"
+ out << " float4 gl_FragCoord : TEXCOORD" << HLSL_FRAG_COORD_SEMANTIC << ";\n";
+ out << " float __vFace : VFACE;\n"
"};\n"
"\n";
out << varyingGlobals;
@@ -76,6 +78,7 @@
"\n"
"static float4 gl_Color[1] = {float4(0, 0, 0, 0)};\n"
"static float4 gl_FragCoord = float4(0, 0, 0, 0);\n"
+ "static bool gl_FrontFacing = false;\n"
"\n"
"float4 gl_texture2D(sampler2D s, float2 t)\n"
"{\n"
@@ -635,7 +638,8 @@
" gl_FragCoord.x = (input.gl_FragCoord.x * rhw) * gl_Window.x + gl_Window.z;\n"
" gl_FragCoord.y = (input.gl_FragCoord.y * rhw) * gl_Window.y + gl_Window.w;\n"
" gl_FragCoord.z = (input.gl_FragCoord.z * rhw) * gl_Depth.x + gl_Depth.y;\n"
- " gl_FragCoord.w = rhw;\n";
+ " gl_FragCoord.w = rhw;\n"
+ " gl_FrontFacing = __frontCCW ? (input.__vFace >= 0.0) : (input.__vFace <= 0.0);\n";
for (TSymbolTableLevel::const_iterator namedSymbol = symbols->begin(); namedSymbol != symbols->end(); namedSymbol++)
{