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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 <string>
#include <list>
#include <vector>
#include "angle_gl.h"
#include <GLSLANG/ShaderLang.h>
#include "common/angleutils.h"
#include "libGLESv2/angletypes.h"
namespace rx
{
class ShaderImpl;
}
namespace gl
{
class ResourceManager;
struct PackedVarying : public sh::Varying
{
unsigned int registerIndex; // Assigned during link
unsigned int columnIndex; // Assigned during link, defaults to 0
PackedVarying(const sh::Varying &varying)
: sh::Varying(varying),
registerIndex(GL_INVALID_INDEX),
columnIndex(0)
{}
bool registerAssigned() const { return registerIndex != GL_INVALID_INDEX; }
bool isBuiltIn() const { return name.compare(0, 3, "gl_") == 0; }
void resetRegisterAssignment()
{
registerIndex = GL_INVALID_INDEX;
}
};
class Shader
{
public:
Shader(ResourceManager *manager, rx::ShaderImpl *impl, GLenum type, GLuint handle);
virtual ~Shader();
GLenum getType() const { return mType; }
GLuint getHandle() const;
rx::ShaderImpl *getImplementation() { return mShader; }
const rx::ShaderImpl *getImplementation() const { return mShader; }
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;
void compile();
bool isCompiled() const { return mCompiled; }
void addRef();
void release();
unsigned int getRefCount() const;
bool isFlaggedForDeletion() const;
void flagForDeletion();
const std::vector<gl::PackedVarying> &getVaryings() const;
const std::vector<sh::Uniform> &getUniforms() const;
const std::vector<sh::InterfaceBlock> &getInterfaceBlocks() const;
const std::vector<sh::Attribute> &getActiveAttributes() const;
const std::vector<sh::Attribute> &getActiveOutputVariables() const;
std::vector<gl::PackedVarying> &getVaryings();
std::vector<sh::Uniform> &getUniforms();
std::vector<sh::InterfaceBlock> &getInterfaceBlocks();
std::vector<sh::Attribute> &getActiveAttributes();
std::vector<sh::Attribute> &getActiveOutputVariables();
private:
DISALLOW_COPY_AND_ASSIGN(Shader);
static void getSourceImpl(const std::string &source, GLsizei bufSize, GLsizei *length, char *buffer);
rx::ShaderImpl *mShader;
const GLuint mHandle;
const GLenum mType;
std::string mSource;
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
bool mCompiled; // Indicates if this shader has been successfully compiled
ResourceManager *mResourceManager;
};
}
#endif // LIBGLESV2_SHADER_H_
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