blob: d7b9fbb23647ff916800fe92bff78772f7a80737 [file] [log] [blame]
//
// Copyright (c) 2016 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.
//
// OutputVulkanGLSL:
// Code that outputs shaders that fit GL_KHR_vulkan_glsl.
// The shaders are then fed into glslang to spit out SPIR-V (libANGLE-side).
// See: https://www.khronos.org/registry/vulkan/specs/misc/GL_KHR_vulkan_glsl.txt
//
#include "compiler/translator/OutputVulkanGLSL.h"
#include "compiler/translator/BaseTypes.h"
#include "compiler/translator/Symbol.h"
#include "compiler/translator/util.h"
namespace sh
{
TOutputVulkanGLSL::TOutputVulkanGLSL(TInfoSinkBase &objSink,
ShArrayIndexClampingStrategy clampingStrategy,
ShHashFunction64 hashFunction,
NameMap &nameMap,
TSymbolTable *symbolTable,
sh::GLenum shaderType,
int shaderVersion,
ShShaderOutput output,
ShCompileOptions compileOptions)
: TOutputGLSL(objSink,
clampingStrategy,
hashFunction,
nameMap,
symbolTable,
shaderType,
shaderVersion,
output,
compileOptions)
{}
// TODO(jmadill): This is not complete.
void TOutputVulkanGLSL::writeLayoutQualifier(TIntermTyped *variable)
{
const TType &type = variable->getType();
bool needsCustomLayout =
(type.getQualifier() == EvqAttribute || type.getQualifier() == EvqFragmentOut ||
type.getQualifier() == EvqVertexIn || IsVarying(type.getQualifier()) ||
IsSampler(type.getBasicType()) || type.isInterfaceBlock());
if (!NeedsToWriteLayoutQualifier(type) && !needsCustomLayout)
{
return;
}
TInfoSinkBase &out = objSink();
const TLayoutQualifier &layoutQualifier = type.getLayoutQualifier();
// This isn't super clean, but it gets the job done.
// See corresponding code in GlslangWrapper.cpp.
TIntermSymbol *symbol = variable->getAsSymbolNode();
ASSERT(symbol);
if (needsCustomLayout)
{
out << "@@ LAYOUT-" << symbol->getName() << " @@";
}
else
{
out << "layout(";
}
if (IsImage(type.getBasicType()) && layoutQualifier.imageInternalFormat != EiifUnspecified)
{
ASSERT(type.getQualifier() == EvqTemporary || type.getQualifier() == EvqUniform);
out << getImageInternalFormatString(layoutQualifier.imageInternalFormat);
}
if (!needsCustomLayout)
{
out << ") ";
}
}
void TOutputVulkanGLSL::writeQualifier(TQualifier qualifier, const TSymbol *symbol)
{
if (qualifier != EvqUniform && qualifier != EvqVaryingIn && qualifier != EvqVaryingOut &&
qualifier != EvqAttribute)
{
TOutputGLSLBase::writeQualifier(qualifier, symbol);
return;
}
if (symbol == nullptr)
{
return;
}
TInfoSinkBase &out = objSink();
out << "@@ QUALIFIER-" << symbol->name().data() << " @@ ";
}
void TOutputVulkanGLSL::writeVariableType(const TType &type, const TSymbol *symbol)
{
TType overrideType(type);
// External textures are treated as 2D textures in the vulkan back-end
if (type.getBasicType() == EbtSamplerExternalOES)
{
overrideType.setBasicType(EbtSampler2D);
}
TOutputGLSL::writeVariableType(overrideType, symbol);
}
void TOutputVulkanGLSL::writeStructType(const TStructure *structure)
{
if (!structDeclared(structure))
{
declareStruct(structure);
objSink() << ";\n";
}
}
} // namespace sh