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//
// Copyright 2017 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.
//
// ImageFunctionHLSL: Class for writing implementations of ESSL image functions into HLSL output.
//
#ifndef COMPILER_TRANSLATOR_IMAGEFUNCTIONHLSL_H_
#define COMPILER_TRANSLATOR_IMAGEFUNCTIONHLSL_H_
#include <set>
#include "GLSLANG/ShaderLang.h"
#include "compiler/translator/BaseTypes.h"
#include "compiler/translator/Common.h"
#include "compiler/translator/InfoSink.h"
#include "compiler/translator/Types.h"
namespace sh
{
class ImageFunctionHLSL final : angle::NonCopyable
{
public:
// Returns the name of the image function implementation to caller.
// The name that's passed in is the name of the GLSL image function that it should implement.
ImmutableString useImageFunction(const ImmutableString &name,
const TBasicType &type,
TLayoutImageInternalFormat imageInternalFormat,
bool readonly);
void imageFunctionHeader(TInfoSinkBase &out);
const std::set<std::string> &getUsedImage2DFunctionNames() const
{
return mUsedImage2DFunctionNames;
}
private:
struct ImageFunction
{
// See ESSL 3.10.4 section 8.12 for reference about what the different methods below do.
enum class Method
{
SIZE,
LOAD,
STORE
};
enum class DataType
{
NONE,
FLOAT4,
UINT4,
INT4,
UNORM_FLOAT4,
SNORM_FLOAT4
};
ImmutableString name() const;
bool operator<(const ImageFunction &rhs) const;
DataType getDataType(TLayoutImageInternalFormat format) const;
const char *getReturnType() const;
TBasicType image;
TLayoutImageInternalFormat imageInternalFormat;
bool readonly;
Method method;
DataType type;
};
static ImmutableString GetImageReference(TInfoSinkBase &out,
const ImageFunctionHLSL::ImageFunction &imageFunction);
static void OutputImageFunctionArgumentList(
TInfoSinkBase &out,
const ImageFunctionHLSL::ImageFunction &imageFunction);
static void OutputImageSizeFunctionBody(TInfoSinkBase &out,
const ImageFunctionHLSL::ImageFunction &imageFunction,
const ImmutableString &imageReference);
static void OutputImageLoadFunctionBody(TInfoSinkBase &out,
const ImageFunctionHLSL::ImageFunction &imageFunction,
const ImmutableString &imageReference);
static void OutputImageStoreFunctionBody(TInfoSinkBase &out,
const ImageFunctionHLSL::ImageFunction &imageFunction,
const ImmutableString &imageReference);
using ImageFunctionSet = std::set<ImageFunction>;
ImageFunctionSet mUsesImage;
std::set<std::string> mUsedImage2DFunctionNames;
};
} // namespace sh
#endif // COMPILER_TRANSLATOR_IMAGEFUNCTIONHLSL_H_
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