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//
// Copyright (c) 2014 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.
//
// UtilsHLSL.cpp:
// Utility methods for GLSL to HLSL translation.
//
#include "compiler/translator/UtilsHLSL.h"
#include "compiler/translator/StructureHLSL.h"
#include "compiler/translator/SymbolTable.h"
namespace sh
{
TString SamplerString(const TType &type)
{
if (IsShadowSampler(type.getBasicType()))
{
return "SamplerComparisonState";
}
else
{
return "SamplerState";
}
}
TString TextureString(const TType &type)
{
switch (type.getBasicType())
{
case EbtSampler2D: return "Texture2D";
case EbtSamplerCube: return "TextureCube";
case EbtSamplerExternalOES: return "Texture2D";
case EbtSampler2DArray: return "Texture2DArray";
case EbtSampler3D: return "Texture3D";
case EbtISampler2D: return "Texture2D<int4>";
case EbtISampler3D: return "Texture3D<int4>";
case EbtISamplerCube: return "Texture2DArray<int4>";
case EbtISampler2DArray: return "Texture2DArray<int4>";
case EbtUSampler2D: return "Texture2D<uint4>";
case EbtUSampler3D: return "Texture3D<uint4>";
case EbtUSamplerCube: return "Texture2DArray<uint4>";
case EbtUSampler2DArray: return "Texture2DArray<uint4>";
case EbtSampler2DShadow: return "Texture2D";
case EbtSamplerCubeShadow: return "TextureCube";
case EbtSampler2DArrayShadow: return "Texture2DArray";
default: UNREACHABLE();
}
return "<unknown texture type>";
}
TString DecorateUniform(const TString &string, const TType &type)
{
if (type.getBasicType() == EbtSamplerExternalOES)
{
return "ex_" + string;
}
return Decorate(string);
}
TString DecorateField(const TString &string, const TStructure &structure)
{
if (structure.name().compare(0, 3, "gl_") != 0)
{
return Decorate(string);
}
return string;
}
TString DecoratePrivate(const TString &privateText)
{
return "dx_" + privateText;
}
TString Decorate(const TString &string)
{
if (string.compare(0, 3, "gl_") != 0)
{
return "_" + string;
}
return string;
}
TString TypeString(const TType &type)
{
const TStructure* structure = type.getStruct();
if (structure)
{
const TString& typeName = structure->name();
if (typeName != "")
{
return StructNameString(*structure);
}
else // Nameless structure, define in place
{
return StructureHLSL::defineNameless(*structure);
}
}
else if (type.isMatrix())
{
int cols = type.getCols();
int rows = type.getRows();
return "float" + str(cols) + "x" + str(rows);
}
else
{
switch (type.getBasicType())
{
case EbtFloat:
switch (type.getNominalSize())
{
case 1: return "float";
case 2: return "float2";
case 3: return "float3";
case 4: return "float4";
}
case EbtInt:
switch (type.getNominalSize())
{
case 1: return "int";
case 2: return "int2";
case 3: return "int3";
case 4: return "int4";
}
case EbtUInt:
switch (type.getNominalSize())
{
case 1: return "uint";
case 2: return "uint2";
case 3: return "uint3";
case 4: return "uint4";
}
case EbtBool:
switch (type.getNominalSize())
{
case 1: return "bool";
case 2: return "bool2";
case 3: return "bool3";
case 4: return "bool4";
}
case EbtVoid:
return "void";
case EbtSampler2D:
case EbtISampler2D:
case EbtUSampler2D:
case EbtSampler2DArray:
case EbtISampler2DArray:
case EbtUSampler2DArray:
return "sampler2D";
case EbtSamplerCube:
case EbtISamplerCube:
case EbtUSamplerCube:
return "samplerCUBE";
case EbtSamplerExternalOES:
return "sampler2D";
default:
break;
}
}
UNREACHABLE();
return "<unknown type>";
}
TString StructNameString(const TStructure &structure)
{
if (structure.name().empty())
{
return "";
}
// For structures at global scope we use a consistent
// translation so that we can link between shader stages.
if (structure.atGlobalScope())
{
return Decorate(structure.name());
}
return "ss" + str(structure.uniqueId()) + "_" + structure.name();
}
TString QualifiedStructNameString(const TStructure &structure, bool useHLSLRowMajorPacking,
bool useStd140Packing)
{
if (structure.name() == "")
{
return "";
}
TString prefix = "";
// Structs packed with row-major matrices in HLSL are prefixed with "rm"
// GLSL column-major maps to HLSL row-major, and the converse is true
if (useStd140Packing)
{
prefix += "std_";
}
if (useHLSLRowMajorPacking)
{
prefix += "rm_";
}
return prefix + StructNameString(structure);
}
TString InterpolationString(TQualifier qualifier)
{
switch (qualifier)
{
case EvqVaryingIn: return "";
case EvqFragmentIn: return "";
case EvqInvariantVaryingIn: return "";
case EvqSmoothIn: return "linear";
case EvqFlatIn: return "nointerpolation";
case EvqCentroidIn: return "centroid";
case EvqVaryingOut: return "";
case EvqVertexOut: return "";
case EvqInvariantVaryingOut: return "";
case EvqSmoothOut: return "linear";
case EvqFlatOut: return "nointerpolation";
case EvqCentroidOut: return "centroid";
default: UNREACHABLE();
}
return "";
}
TString QualifierString(TQualifier qualifier)
{
switch (qualifier)
{
case EvqIn: return "in";
case EvqOut: return "inout"; // 'out' results in an HLSL error if not all fields are written, for GLSL it's undefined
case EvqInOut: return "inout";
case EvqConstReadOnly: return "const";
default: UNREACHABLE();
}
return "";
}
}
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