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gecko-dev/gfx/angle/angle-faceforward-emu.patch

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From: Jeff Gilbert <jgilbert@mozilla.com>
Bug 771406 - Add emulation for GLSL faceforward() to ANGLE - r=bjacob
diff --git a/gfx/angle/src/compiler/BuiltInFunctionEmulator.cpp b/gfx/angle/src/compiler/BuiltInFunctionEmulator.cpp
--- a/gfx/angle/src/compiler/BuiltInFunctionEmulator.cpp
+++ b/gfx/angle/src/compiler/BuiltInFunctionEmulator.cpp
@@ -26,16 +26,22 @@ const char* kFunctionEmulationVertexSour
"#error no emulation for distance(vec3, vec3)",
"#error no emulation for distance(vec4, vec4)",
"#define webgl_dot_emu(x, y) ((x) * (y))",
"#error no emulation for dot(vec2, vec2)",
"#error no emulation for dot(vec3, vec3)",
"#error no emulation for dot(vec4, vec4)",
+ // |faceforward(N, I, Nref)| is |dot(NRef, I) < 0 ? N : -N|
+ "#define webgl_faceforward_emu(N, I, Nref) (((Nref) * (I) < 0.0) ? (N) : -(N))",
+ "#error no emulation for faceforward(vec2, vec2, vec2)",
+ "#error no emulation for faceforward(vec3, vec3, vec3)",
+ "#error no emulation for faceforward(vec4, vec4, vec4)",
+
"#define webgl_length_emu(x) ((x) >= 0.0 ? (x) : -(x))",
"#error no emulation for length(vec2)",
"#error no emulation for length(vec3)",
"#error no emulation for length(vec4)",
"#define webgl_normalize_emu(x) ((x) == 0.0 ? 0.0 : ((x) > 0.0 ? 1.0 : -1.0))",
"#error no emulation for normalize(vec2)",
"#error no emulation for normalize(vec3)",
@@ -58,16 +64,22 @@ const char* kFunctionEmulationFragmentSo
"#error no emulation for distance(vec3, vec3)",
"#error no emulation for distance(vec4, vec4)",
"#define webgl_dot_emu(x, y) ((x) * (y))",
"#error no emulation for dot(vec2, vec2)",
"#error no emulation for dot(vec3, vec3)",
"#error no emulation for dot(vec4, vec4)",
+ // |faceforward(N, I, Nref)| is |dot(NRef, I) < 0 ? N : -N|
+ "#define webgl_faceforward_emu(N, I, Nref) (((Nref) * (I) < 0.0) ? (N) : -(N))",
+ "#error no emulation for faceforward(vec2, vec2, vec2)",
+ "#error no emulation for faceforward(vec3, vec3, vec3)",
+ "#error no emulation for faceforward(vec4, vec4, vec4)",
+
"#define webgl_length_emu(x) ((x) >= 0.0 ? (x) : -(x))",
"#error no emulation for length(vec2)",
"#error no emulation for length(vec3)",
"#error no emulation for length(vec4)",
"#define webgl_normalize_emu(x) ((x) == 0.0 ? 0.0 : ((x) > 0.0 ? 1.0 : -1.0))",
"#error no emulation for normalize(vec2)",
"#error no emulation for normalize(vec3)",
@@ -89,16 +101,20 @@ const bool kFunctionEmulationVertexMask[
true, // TFunctionDistance1_1
false, // TFunctionDistance2_2
false, // TFunctionDistance3_3
false, // TFunctionDistance4_4
true, // TFunctionDot1_1
false, // TFunctionDot2_2
false, // TFunctionDot3_3
false, // TFunctionDot4_4
+ true, // TFunctionFaceForward1_1_1
+ false, // TFunctionFaceForward2_2_2
+ false, // TFunctionFaceForward3_3_3
+ false, // TFunctionFaceForward4_4_4
true, // TFunctionLength1
false, // TFunctionLength2
false, // TFunctionLength3
false, // TFunctionLength4
true, // TFunctionNormalize1
false, // TFunctionNormalize2
false, // TFunctionNormalize3
false, // TFunctionNormalize4
@@ -115,16 +131,20 @@ const bool kFunctionEmulationVertexMask[
false, // TFunctionDistance1_1
false, // TFunctionDistance2_2
false, // TFunctionDistance3_3
false, // TFunctionDistance4_4
false, // TFunctionDot1_1
false, // TFunctionDot2_2
false, // TFunctionDot3_3
false, // TFunctionDot4_4
+ false, // TFunctionFaceForward1_1_1
+ false, // TFunctionFaceForward2_2_2
+ false, // TFunctionFaceForward3_3_3
+ false, // TFunctionFaceForward4_4_4
false, // TFunctionLength1
false, // TFunctionLength2
false, // TFunctionLength3
false, // TFunctionLength4
false, // TFunctionNormalize1
false, // TFunctionNormalize2
false, // TFunctionNormalize3
false, // TFunctionNormalize4
@@ -146,16 +166,20 @@ const bool kFunctionEmulationFragmentMas
true, // TFunctionDistance1_1
false, // TFunctionDistance2_2
false, // TFunctionDistance3_3
false, // TFunctionDistance4_4
true, // TFunctionDot1_1
false, // TFunctionDot2_2
false, // TFunctionDot3_3
false, // TFunctionDot4_4
+ true, // TFunctionFaceForward1_1_1
+ false, // TFunctionFaceForward2_2_2
+ false, // TFunctionFaceForward3_3_3
+ false, // TFunctionFaceForward4_4_4
true, // TFunctionLength1
false, // TFunctionLength2
false, // TFunctionLength3
false, // TFunctionLength4
true, // TFunctionNormalize1
false, // TFunctionNormalize2
false, // TFunctionNormalize3
false, // TFunctionNormalize4
@@ -172,16 +196,20 @@ const bool kFunctionEmulationFragmentMas
false, // TFunctionDistance1_1
false, // TFunctionDistance2_2
false, // TFunctionDistance3_3
false, // TFunctionDistance4_4
false, // TFunctionDot1_1
false, // TFunctionDot2_2
false, // TFunctionDot3_3
false, // TFunctionDot4_4
+ false, // TFunctionFaceForward1_1_1
+ false, // TFunctionFaceForward2_2_2
+ false, // TFunctionFaceForward3_3_3
+ false, // TFunctionFaceForward4_4_4
false, // TFunctionLength1
false, // TFunctionLength2
false, // TFunctionLength3
false, // TFunctionLength4
false, // TFunctionNormalize1
false, // TFunctionNormalize2
false, // TFunctionNormalize3
false, // TFunctionNormalize4
@@ -239,25 +267,37 @@ public:
case EOpReflect:
case EOpRefract:
case EOpMul:
break;
default:
return true;
};
const TIntermSequence& sequence = node->getSequence();
- // Right now we only handle built-in functions with two parameters.
- if (sequence.size() != 2)
+ bool needToEmulate = false;
+
+ if (sequence.size() == 2) {
+ TIntermTyped* param1 = sequence[0]->getAsTyped();
+ TIntermTyped* param2 = sequence[1]->getAsTyped();
+ if (!param1 || !param2)
+ return true;
+ needToEmulate = mEmulator.SetFunctionCalled(
+ node->getOp(), param1->getType(), param2->getType());
+ } else if (sequence.size() == 3) {
+ TIntermTyped* param1 = sequence[0]->getAsTyped();
+ TIntermTyped* param2 = sequence[1]->getAsTyped();
+ TIntermTyped* param3 = sequence[2]->getAsTyped();
+ if (!param1 || !param2 || !param3)
+ return true;
+ needToEmulate = mEmulator.SetFunctionCalled(
+ node->getOp(), param1->getType(), param2->getType(), param3->getType());
+ } else {
return true;
- TIntermTyped* param1 = sequence[0]->getAsTyped();
- TIntermTyped* param2 = sequence[1]->getAsTyped();
- if (!param1 || !param2)
- return true;
- bool needToEmulate = mEmulator.SetFunctionCalled(
- node->getOp(), param1->getType(), param2->getType());
+ }
+
if (needToEmulate)
node->setUseEmulatedFunction();
}
return true;
}
private:
BuiltInFunctionEmulator& mEmulator;
@@ -286,16 +326,23 @@ bool BuiltInFunctionEmulator::SetFunctio
bool BuiltInFunctionEmulator::SetFunctionCalled(
TOperator op, const TType& param1, const TType& param2)
{
TBuiltInFunction function = IdentifyFunction(op, param1, param2);
return SetFunctionCalled(function);
}
bool BuiltInFunctionEmulator::SetFunctionCalled(
+ TOperator op, const TType& param1, const TType& param2, const TType& param3)
+{
+ TBuiltInFunction function = IdentifyFunction(op, param1, param2, param3);
+ return SetFunctionCalled(function);
+}
+
+bool BuiltInFunctionEmulator::SetFunctionCalled(
BuiltInFunctionEmulator::TBuiltInFunction function) {
if (function == TFunctionUnknown || mFunctionMask[function] == false)
return false;
for (size_t i = 0; i < mFunctions.size(); ++i) {
if (mFunctions[i] == function)
return true;
}
mFunctions.push_back(function);
@@ -377,16 +424,44 @@ BuiltInFunctionEmulator::IdentifyFunctio
}
if (function == TFunctionUnknown)
return TFunctionUnknown;
if (param1.isVector())
function += param1.getNominalSize() - 1;
return static_cast<TBuiltInFunction>(function);
}
+BuiltInFunctionEmulator::TBuiltInFunction
+BuiltInFunctionEmulator::IdentifyFunction(
+ TOperator op, const TType& param1, const TType& param2, const TType& param3)
+{
+ // Check that all params have the same type, length,
+ // and that they're not too large.
+ if (param1.isVector() != param2.isVector() ||
+ param2.isVector() != param3.isVector() ||
+ param1.getNominalSize() != param2.getNominalSize() ||
+ param2.getNominalSize() != param3.getNominalSize() ||
+ param1.getNominalSize() > 4)
+ return TFunctionUnknown;
+
+ unsigned int function = TFunctionUnknown;
+ switch (op) {
+ case EOpFaceForward:
+ function = TFunctionFaceForward1_1_1;
+ break;
+ default:
+ break;
+ }
+ if (function == TFunctionUnknown)
+ return TFunctionUnknown;
+ if (param1.isVector())
+ function += param1.getNominalSize() - 1;
+ return static_cast<TBuiltInFunction>(function);
+}
+
void BuiltInFunctionEmulator::MarkBuiltInFunctionsForEmulation(
TIntermNode* root)
{
ASSERT(root);
BuiltInFunctionEmulationMarker marker(*this);
root->traverse(&marker);
}
diff --git a/gfx/angle/src/compiler/BuiltInFunctionEmulator.h b/gfx/angle/src/compiler/BuiltInFunctionEmulator.h
--- a/gfx/angle/src/compiler/BuiltInFunctionEmulator.h
+++ b/gfx/angle/src/compiler/BuiltInFunctionEmulator.h
@@ -23,16 +23,18 @@ public:
// Records that a function is called by the shader and might needs to be
// emulated. If the function's group is not in mFunctionGroupFilter, this
// becomes an no-op.
// Returns true if the function call needs to be replaced with an emulated
// one.
bool SetFunctionCalled(TOperator op, const TType& param);
bool SetFunctionCalled(
TOperator op, const TType& param1, const TType& param2);
+ bool SetFunctionCalled(
+ TOperator op, const TType& param1, const TType& param2, const TType& param3);
// Output function emulation definition. This should be before any other
// shader source.
void OutputEmulatedFunctionDefinition(TInfoSinkBase& out, bool withPrecision) const;
void MarkBuiltInFunctionsForEmulation(TIntermNode* root);
void Cleanup();
@@ -55,16 +57,21 @@ private:
TFunctionDistance3_3, // vec3 distance(vec3, vec3);
TFunctionDistance4_4, // vec4 distance(vec4, vec4);
TFunctionDot1_1, // float dot(float, float);
TFunctionDot2_2, // vec2 dot(vec2, vec2);
TFunctionDot3_3, // vec3 dot(vec3, vec3);
TFunctionDot4_4, // vec4 dot(vec4, vec4);
+ TFunctionFaceForward1_1_1, // float faceforward(float, float, float);
+ TFunctionFaceForward2_2_2, // vec2 faceforward(vec2, vec2, vec2);
+ TFunctionFaceForward3_3_3, // vec3 faceforward(vec3, vec3, vec3);
+ TFunctionFaceForward4_4_4, // vec4 faceforward(vec4, vec4, vec4);
+
TFunctionLength1, // float length(float);
TFunctionLength2, // float length(vec2);
TFunctionLength3, // float length(vec3);
TFunctionLength4, // float length(vec4);
TFunctionNormalize1, // float normalize(float);
TFunctionNormalize2, // vec2 normalize(vec2);
TFunctionNormalize3, // vec3 normalize(vec3);
@@ -76,16 +83,18 @@ private:
TFunctionReflect4_4, // vec4 reflect(vec4, vec4);
TFunctionUnknown
};
TBuiltInFunction IdentifyFunction(TOperator op, const TType& param);
TBuiltInFunction IdentifyFunction(
TOperator op, const TType& param1, const TType& param2);
+ TBuiltInFunction IdentifyFunction(
+ TOperator op, const TType& param1, const TType& param2, const TType& param3);
bool SetFunctionCalled(TBuiltInFunction function);
std::vector<TBuiltInFunction> mFunctions;
const bool* mFunctionMask; // a boolean flag for each function.
const char** mFunctionSource;
};
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