| // |
| // 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. |
| // |
| // TextureFunctionHLSL: Class for writing implementations of ESSL texture functions into HLSL |
| // output. Some of the implementations are straightforward and just call the HLSL equivalent of the |
| // ESSL texture function, others do more work to emulate ESSL texture sampling or size query |
| // behavior. |
| // |
| |
| #ifndef COMPILER_TRANSLATOR_TEXTUREFUNCTIONHLSL_H_ |
| #define COMPILER_TRANSLATOR_TEXTUREFUNCTIONHLSL_H_ |
| |
| #include <set> |
| |
| #include "compiler/translator/BaseTypes.h" |
| #include "compiler/translator/Common.h" |
| #include "compiler/translator/InfoSink.h" |
| #include "GLSLANG/ShaderLang.h" |
| |
| namespace sh |
| { |
| |
| class TextureFunctionHLSL final : angle::NonCopyable |
| { |
| public: |
| struct TextureFunction |
| { |
| // See ESSL 3.00.6 section 8.8 for reference about what the different methods below do. |
| enum Method |
| { |
| IMPLICIT, // Mipmap LOD determined implicitly (standard lookup) |
| BIAS, |
| LOD, |
| LOD0, |
| LOD0BIAS, |
| SIZE, // textureSize() |
| FETCH, |
| GRAD |
| }; |
| |
| TString name() const; |
| |
| bool operator<(const TextureFunction &rhs) const; |
| |
| const char *getReturnType() const; |
| |
| TBasicType sampler; |
| int coords; |
| bool proj; |
| bool offset; |
| Method method; |
| }; |
| |
| // Returns the name of the texture function implementation to call. |
| // The name that's passed in is the name of the GLSL texture function that it should implement. |
| TString useTextureFunction(const TString &name, |
| TBasicType samplerType, |
| int coords, |
| size_t argumentCount, |
| bool lod0, |
| sh::GLenum shaderType); |
| |
| void textureFunctionHeader(TInfoSinkBase &out, |
| const ShShaderOutput outputType, |
| bool getDimensionsIgnoresBaseLevel); |
| |
| private: |
| typedef std::set<TextureFunction> TextureFunctionSet; |
| TextureFunctionSet mUsesTexture; |
| }; |
| |
| } // namespace sh |
| |
| #endif // COMPILER_TRANSLATOR_TEXTUREFUNCTIONHLSL_H_ |