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//
// Copyright (c) 2010 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
#include "compiler/translator/util.h"
#include <limits>
#include "compiler/preprocessor/numeric_lex.h"
#include "common/utilities.h"
bool atof_clamp(const char *str, float *value)
{
bool success = pp::numeric_lex_float(str, value);
if (!success)
*value = std::numeric_limits<float>::max();
return success;
}
bool atoi_clamp(const char *str, int *value)
{
bool success = pp::numeric_lex_int(str, value);
if (!success)
*value = std::numeric_limits<int>::max();
return success;
}
namespace sh
{
GLenum GLVariableType(const TType &type)
{
if (type.getBasicType() == EbtFloat)
{
if (type.isScalar())
{
return GL_FLOAT;
}
else if (type.isVector())
{
switch (type.getNominalSize())
{
case 2: return GL_FLOAT_VEC2;
case 3: return GL_FLOAT_VEC3;
case 4: return GL_FLOAT_VEC4;
default: UNREACHABLE();
}
}
else if (type.isMatrix())
{
switch (type.getCols())
{
case 2:
switch (type.getRows())
{
case 2: return GL_FLOAT_MAT2;
case 3: return GL_FLOAT_MAT2x3;
case 4: return GL_FLOAT_MAT2x4;
default: UNREACHABLE();
}
case 3:
switch (type.getRows())
{
case 2: return GL_FLOAT_MAT3x2;
case 3: return GL_FLOAT_MAT3;
case 4: return GL_FLOAT_MAT3x4;
default: UNREACHABLE();
}
case 4:
switch (type.getRows())
{
case 2: return GL_FLOAT_MAT4x2;
case 3: return GL_FLOAT_MAT4x3;
case 4: return GL_FLOAT_MAT4;
default: UNREACHABLE();
}
default: UNREACHABLE();
}
}
else UNREACHABLE();
}
else if (type.getBasicType() == EbtInt)
{
if (type.isScalar())
{
return GL_INT;
}
else if (type.isVector())
{
switch (type.getNominalSize())
{
case 2: return GL_INT_VEC2;
case 3: return GL_INT_VEC3;
case 4: return GL_INT_VEC4;
default: UNREACHABLE();
}
}
else UNREACHABLE();
}
else if (type.getBasicType() == EbtUInt)
{
if (type.isScalar())
{
return GL_UNSIGNED_INT;
}
else if (type.isVector())
{
switch (type.getNominalSize())
{
case 2: return GL_UNSIGNED_INT_VEC2;
case 3: return GL_UNSIGNED_INT_VEC3;
case 4: return GL_UNSIGNED_INT_VEC4;
default: UNREACHABLE();
}
}
else UNREACHABLE();
}
else if (type.getBasicType() == EbtBool)
{
if (type.isScalar())
{
return GL_BOOL;
}
else if (type.isVector())
{
switch (type.getNominalSize())
{
case 2: return GL_BOOL_VEC2;
case 3: return GL_BOOL_VEC3;
case 4: return GL_BOOL_VEC4;
default: UNREACHABLE();
}
}
else UNREACHABLE();
}
switch (type.getBasicType())
{
case EbtSampler2D: return GL_SAMPLER_2D;
case EbtSampler3D: return GL_SAMPLER_3D;
case EbtSamplerCube: return GL_SAMPLER_CUBE;
case EbtSamplerExternalOES: return GL_SAMPLER_EXTERNAL_OES;
case EbtSampler2DRect: return GL_SAMPLER_2D_RECT_ARB;
case EbtSampler2DArray: return GL_SAMPLER_2D_ARRAY;
case EbtISampler2D: return GL_INT_SAMPLER_2D;
case EbtISampler3D: return GL_INT_SAMPLER_3D;
case EbtISamplerCube: return GL_INT_SAMPLER_CUBE;
case EbtISampler2DArray: return GL_INT_SAMPLER_2D_ARRAY;
case EbtUSampler2D: return GL_UNSIGNED_INT_SAMPLER_2D;
case EbtUSampler3D: return GL_UNSIGNED_INT_SAMPLER_3D;
case EbtUSamplerCube: return GL_UNSIGNED_INT_SAMPLER_CUBE;
case EbtUSampler2DArray: return GL_UNSIGNED_INT_SAMPLER_2D_ARRAY;
case EbtSampler2DShadow: return GL_SAMPLER_2D_SHADOW;
case EbtSamplerCubeShadow: return GL_SAMPLER_CUBE_SHADOW;
case EbtSampler2DArrayShadow: return GL_SAMPLER_2D_ARRAY_SHADOW;
default: UNREACHABLE();
}
return GL_NONE;
}
GLenum GLVariablePrecision(const TType &type)
{
if (type.getBasicType() == EbtFloat)
{
switch (type.getPrecision())
{
case EbpHigh:
return GL_HIGH_FLOAT;
case EbpMedium:
return GL_MEDIUM_FLOAT;
case EbpLow:
return GL_LOW_FLOAT;
case EbpUndefined:
// Should be defined as the default precision by the parser
default:
UNREACHABLE();
}
}
else if (type.getBasicType() == EbtInt || type.getBasicType() == EbtUInt)
{
switch (type.getPrecision())
{
case EbpHigh:
return GL_HIGH_INT;
case EbpMedium:
return GL_MEDIUM_INT;
case EbpLow:
return GL_LOW_INT;
case EbpUndefined:
// Should be defined as the default precision by the parser
default:
UNREACHABLE();
}
}
// Other types (boolean, sampler) don't have a precision
return GL_NONE;
}
TString ArrayString(const TType &type)
{
if (!type.isArray())
{
return "";
}
return "[" + str(type.getArraySize()) + "]";
}
bool IsVaryingOut(TQualifier qualifier)
{
switch (qualifier)
{
case EvqVaryingOut:
case EvqInvariantVaryingOut:
case EvqSmoothOut:
case EvqFlatOut:
case EvqCentroidOut:
case EvqVertexOut:
return true;
default: break;
}
return false;
}
bool IsVaryingIn(TQualifier qualifier)
{
switch (qualifier)
{
case EvqVaryingIn:
case EvqInvariantVaryingIn:
case EvqSmoothIn:
case EvqFlatIn:
case EvqCentroidIn:
case EvqFragmentIn:
return true;
default: break;
}
return false;
}
bool IsVarying(TQualifier qualifier)
{
return IsVaryingIn(qualifier) || IsVaryingOut(qualifier);
}
InterpolationType GetInterpolationType(TQualifier qualifier)
{
switch (qualifier)
{
case EvqFlatIn:
case EvqFlatOut:
return INTERPOLATION_FLAT;
case EvqSmoothIn:
case EvqSmoothOut:
case EvqVertexOut:
case EvqFragmentIn:
case EvqVaryingIn:
case EvqVaryingOut:
case EvqInvariantVaryingIn:
case EvqInvariantVaryingOut:
return INTERPOLATION_SMOOTH;
case EvqCentroidIn:
case EvqCentroidOut:
return INTERPOLATION_CENTROID;
default: UNREACHABLE();
return INTERPOLATION_SMOOTH;
}
}
template <typename VarT>
void GetVariableTraverser::traverse(const TType &type, const TString &name, std::vector<VarT> *output)
{
const TStructure *structure = type.getStruct();
VarT variable;
variable.name = name.c_str();
variable.arraySize = static_cast<unsigned int>(type.getArraySize());
if (!structure)
{
variable.type = GLVariableType(type);
variable.precision = GLVariablePrecision(type);
}
else
{
// Note: this enum value is not exposed outside ANGLE
variable.type = GL_STRUCT_ANGLEX;
variable.structName = structure->name().c_str();
const TFieldList &fields = structure->fields();
for (size_t fieldIndex = 0; fieldIndex < fields.size(); fieldIndex++)
{
TField *field = fields[fieldIndex];
traverse(*field->type(), field->name(), &variable.fields);
}
}
visitVariable(&variable);
ASSERT(output);
output->push_back(variable);
}
template void GetVariableTraverser::traverse(const TType &, const TString &, std::vector<Uniform> *);
template void GetVariableTraverser::traverse(const TType &, const TString &, std::vector<Varying> *);
template void GetVariableTraverser::traverse(const TType &, const TString &, std::vector<InterfaceBlockField> *);
}
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