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//
// Copyright (c) 2002-2013 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.
//
// Shader.h: Defines the abstract gl::Shader class and its concrete derived
// classes VertexShader and FragmentShader. Implements GL shader objects and
// related functionality. [OpenGL ES 2.0.24] section 2.10 page 24 and section
// 3.8 page 84.
#ifndef LIBGLESV2_SHADER_H_
#define LIBGLESV2_SHADER_H_
#include "angle_gl.h"
#include <string>
#include <list>
#include <vector>
#include "common/shadervars.h"
#include "common/angleutils.h"
#include "libGLESv2/angletypes.h"
#include "GLSLANG/ShaderLang.h"
namespace rx
{
class Renderer;
}
namespace gl
{
class ResourceManager;
struct PackedVarying : public sh::Varying
{
unsigned int registerIndex; // Assigned during link
PackedVarying(const sh::Varying &varying)
: sh::Varying(varying),
registerIndex(GL_INVALID_INDEX)
{}
bool registerAssigned() const { return registerIndex != GL_INVALID_INDEX; }
void resetRegisterAssignment()
{
registerIndex = GL_INVALID_INDEX;
}
};
class Shader
{
friend class DynamicHLSL;
public:
Shader(ResourceManager *manager, const rx::Renderer *renderer, GLuint handle);
virtual ~Shader();
virtual GLenum getType() const = 0;
GLuint getHandle() const;
void deleteSource();
void setSource(GLsizei count, const char *const *string, const GLint *length);
int getInfoLogLength() const;
void getInfoLog(GLsizei bufSize, GLsizei *length, char *infoLog) const;
int getSourceLength() const;
void getSource(GLsizei bufSize, GLsizei *length, char *buffer) const;
int getTranslatedSourceLength() const;
void getTranslatedSource(GLsizei bufSize, GLsizei *length, char *buffer) const;
const std::vector<sh::Uniform> &getUniforms() const;
const std::vector<sh::InterfaceBlock> &getInterfaceBlocks() const;
std::vector<PackedVarying> &getVaryings();
virtual void compile() = 0;
virtual void uncompile();
bool isCompiled() const;
const std::string &getHLSL() const;
void addRef();
void release();
unsigned int getRefCount() const;
bool isFlaggedForDeletion() const;
void flagForDeletion();
int getShaderVersion() const;
void resetVaryingsRegisterAssignment();
static void releaseCompiler();
static ShShaderOutput getCompilerOutputType(GLenum shader);
unsigned int getUniformRegister(const std::string &uniformName) const;
unsigned int getInterfaceBlockRegister(const std::string &blockName) const;
bool usesDepthRange() const { return mUsesDepthRange; }
bool usesPointSize() const { return mUsesPointSize; }
rx::D3DWorkaroundType getD3DWorkarounds() const;
protected:
void parseVaryings(void *compiler);
void compileToHLSL(void *compiler);
void getSourceImpl(const std::string &source, GLsizei bufSize, GLsizei *length, char *buffer) const;
static bool compareVarying(const PackedVarying &x, const PackedVarying &y);
const rx::Renderer *const mRenderer;
std::vector<PackedVarying> mVaryings;
bool mUsesMultipleRenderTargets;
bool mUsesFragColor;
bool mUsesFragData;
bool mUsesFragCoord;
bool mUsesFrontFacing;
bool mUsesPointSize;
bool mUsesPointCoord;
bool mUsesDepthRange;
bool mUsesFragDepth;
int mShaderVersion;
bool mUsesDiscardRewriting;
bool mUsesNestedBreak;
static void *mFragmentCompiler;
static void *mVertexCompiler;
private:
DISALLOW_COPY_AND_ASSIGN(Shader);
void initializeCompiler();
const GLuint mHandle;
unsigned int mRefCount; // Number of program objects this shader is attached to
bool mDeleteStatus; // Flag to indicate that the shader can be deleted when no longer in use
std::string mSource;
std::string mHlsl;
std::string mInfoLog;
std::vector<sh::Uniform> mActiveUniforms;
std::vector<sh::InterfaceBlock> mActiveInterfaceBlocks;
std::map<std::string, unsigned int> mUniformRegisterMap;
std::map<std::string, unsigned int> mInterfaceBlockRegisterMap;
ResourceManager *mResourceManager;
};
class VertexShader : public Shader
{
friend class DynamicHLSL;
public:
VertexShader(ResourceManager *manager, const rx::Renderer *renderer, GLuint handle);
~VertexShader();
virtual GLenum getType() const;
virtual void compile();
virtual void uncompile();
int getSemanticIndex(const std::string &attributeName);
const std::vector<sh::Attribute> &activeAttributes() const { return mActiveAttributes; }
private:
DISALLOW_COPY_AND_ASSIGN(VertexShader);
void parseAttributes();
std::vector<sh::Attribute> mActiveAttributes;
};
class FragmentShader : public Shader
{
public:
FragmentShader(ResourceManager *manager,const rx::Renderer *renderer, GLuint handle);
~FragmentShader();
virtual GLenum getType() const;
virtual void compile();
virtual void uncompile();
const std::vector<sh::Attribute> &getOutputVariables() const;
private:
DISALLOW_COPY_AND_ASSIGN(FragmentShader);
std::vector<sh::Attribute> mActiveOutputVariables;
};
}
#endif // LIBGLESV2_SHADER_H_
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