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Only output faceforward when needed 

TRAC #12042
Signed-off-by: Andrew Lewycky
Signed-off-by: Daniel Koch

Author:    Nicolas Capens

git-svn-id: https://angleproject.googlecode.com/svn/trunk@193 736b8ea6-26fd-11df-bfd4-992fa37f6226
This commit is contained in:
daniel@transgaming.com 2010-04-26 15:33:39 +00:00
Родитель c164135ce9
Коммит 0bbb031dc8
2 изменённых файлов: 86 добавлений и 49 удалений
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131
src/compiler/OutputHLSL.cpp
Просмотреть файл

@ -32,6 +32,10 @@ OutputHLSL::OutputHLSL(TParseContext &context) : TIntermTraverser(true, true, tr
mUsesTexture2DProj_bias = false;
mUsesTextureCube = false;
mUsesTextureCube_bias = false;
mUsesFaceforward1 = false;
mUsesFaceforward2 = false;
mUsesFaceforward3 = false;
mUsesFaceforward4 = false;
mUsesEqualMat2 = false;
mUsesEqualMat3 = false;
mUsesEqualMat4 = false;
@ -453,56 +457,72 @@ void OutputHLSL::header()
"{\n"
" return x - y * floor(x / y);\n"
"}\n"
"\n"
"float faceforward(float N, float I, float Nref)\n"
"{\n"
" if(dot(Nref, I) < 0)\n"
" {\n"
" return N;\n"
" }\n"
" else\n"
" {\n"
" return -N;\n"
" }\n"
"}\n"
"\n"
"float2 faceforward(float2 N, float2 I, float2 Nref)\n"
"{\n"
" if(dot(Nref, I) < 0)\n"
" {\n"
" return N;\n"
" }\n"
" else\n"
" {\n"
" return -N;\n"
" }\n"
"}\n"
"\n"
"float3 faceforward(float3 N, float3 I, float3 Nref)\n"
"{\n"
" if(dot(Nref, I) < 0)\n"
" {\n"
" return N;\n"
" }\n"
" else\n"
" {\n"
" return -N;\n"
" }\n"
"}\n"
"\n"
"float4 faceforward(float4 N, float4 I, float4 Nref)\n"
"{\n"
" if(dot(Nref, I) < 0)\n"
" {\n"
" return N;\n"
" }\n"
" else\n"
" {\n"
" return -N;\n"
" }\n"
"}\n"
"\n";
if (mUsesFaceforward1)
{
out << "float faceforward(float N, float I, float Nref)\n"
"{\n"
" if(dot(Nref, I) < 0)\n"
" {\n"
" return N;\n"
" }\n"
" else\n"
" {\n"
" return -N;\n"
" }\n"
"}\n"
"\n";
}
if (mUsesFaceforward2)
{
out << "float2 faceforward(float2 N, float2 I, float2 Nref)\n"
"{\n"
" if(dot(Nref, I) < 0)\n"
" {\n"
" return N;\n"
" }\n"
" else\n"
" {\n"
" return -N;\n"
" }\n"
"}\n"
"\n";
}
if (mUsesFaceforward3)
{
out << "float3 faceforward(float3 N, float3 I, float3 Nref)\n"
"{\n"
" if(dot(Nref, I) < 0)\n"
" {\n"
" return N;\n"
" }\n"
" else\n"
" {\n"
" return -N;\n"
" }\n"
"}\n"
"\n";
}
if (mUsesFaceforward4)
{
out << "float4 faceforward(float4 N, float4 I, float4 Nref)\n"
"{\n"
" if(dot(Nref, I) < 0)\n"
" {\n"
" return N;\n"
" }\n"
" else\n"
" {\n"
" return -N;\n"
" }\n"
"}\n"
"\n";
}
if (mUsesEqualMat2)
{
out << "bool equal(float2x2 m, float2x2 n)\n"
@ -1346,7 +1366,20 @@ bool OutputHLSL::visitAggregate(Visit visit, TIntermAggregate *node)
case EOpDistance: outputTriplet(visit, "distance(", ", ", ")"); break;
case EOpDot: outputTriplet(visit, "dot(", ", ", ")"); break;
case EOpCross: outputTriplet(visit, "cross(", ", ", ")"); break;
case EOpFaceForward: outputTriplet(visit, "faceforward(", ", ", ")"); break;
case EOpFaceForward:
{
switch (node->getSequence()[0]->getAsTyped()->getSize()) // Number of components in the first argument
{
case 1: mUsesFaceforward1 = true; break;
case 2: mUsesFaceforward2 = true; break;
case 3: mUsesFaceforward3 = true; break;
case 4: mUsesFaceforward4 = true; break;
default: UNREACHABLE();
}
outputTriplet(visit, "faceforward(", ", ", ")");
}
break;
case EOpReflect: outputTriplet(visit, "reflect(", ", ", ")"); break;
case EOpRefract: outputTriplet(visit, "refract(", ", ", ")"); break;
case EOpMul: outputTriplet(visit, "(", " * ", ")"); break;

4
src/compiler/OutputHLSL.h
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@ -69,6 +69,10 @@ class OutputHLSL : public TIntermTraverser
bool mUsesTexture2DProj_bias;
bool mUsesTextureCube;
bool mUsesTextureCube_bias;
bool mUsesFaceforward1;
bool mUsesFaceforward2;
bool mUsesFaceforward3;
bool mUsesFaceforward4;
bool mUsesEqualMat2;
bool mUsesEqualMat3;
bool mUsesEqualMat4;