WebGLShaderValidator.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef WEBGL_SHADER_VALIDATOR_H_

#define WEBGL_SHADER_VALIDATOR_H_

#include <memory>

#include <string>

#include <unordered_map>

#include "GLDefs.h"

#include "GLSLANG/ShaderLang.h"

#include "nsString.h"

namespace mozilla::webgl {

class ShaderValidatorResults final {

 public:

  std::string mInfoLog;

  bool mValid = false;

  std::string mObjectCode;

  int mShaderVersion = 0;

  int mVertexShaderNumViews = 0;

  std::vector<sh::Attribute> mAttributes;

  std::vector<sh::InterfaceBlock> mInterfaceBlocks;

  std::vector<sh::OutputVariable> mOutputVariables;

  std::vector<sh::Uniform> mUniforms;

  std::vector<sh::Varying> mVaryings;

  std::unordered_map<std::string, std::string> mNameMap;

  int mMaxVaryingVectors = 0;

  bool mNeeds_webgl_gl_VertexID_Offset = false;

  bool CanLinkTo(const ShaderValidatorResults& vert,

                 nsCString* const out_log) const;

  size_t SizeOfIncludingThis(mozilla::MallocSizeOf) const;

};

class ShaderValidator final {

 public:

  const ShHandle mHandle;

 private:

  const ShCompileOptions mCompileOptions;

  const int mMaxVaryingVectors;

 public:

  bool mIfNeeded_webgl_gl_VertexID_Offset = false;

  static std::unique_ptr<ShaderValidator> Create(

      GLenum shaderType, ShShaderSpec spec, ShShaderOutput outputLanguage,

      const ShBuiltInResources& resources, ShCompileOptions compileOptions);

 private:

  ShaderValidator(ShHandle handle, ShCompileOptions compileOptions,

                  int maxVaryingVectors)

      : mHandle(handle),

        mCompileOptions(compileOptions),

        mMaxVaryingVectors(maxVaryingVectors) {}

 public:

  ~ShaderValidator();

  std::unique_ptr<const ShaderValidatorResults> ValidateAndTranslate(

      const char*) const;

};

}  // namespace mozilla::webgl

#endif  // WEBGL_SHADER_VALIDATOR_H_