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//
// Copyright (c) 2002-2014 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.cpp: Implements the gl::Shader class and its 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.
#include "libGLESv2/Shader.h"
#include "libGLESv2/renderer/Renderer.h"
#include "libGLESv2/renderer/ShaderImpl.h"
#include "libGLESv2/Constants.h"
#include "libGLESv2/ResourceManager.h"
#include "common/utilities.h"
#include "GLSLANG/ShaderLang.h"
#include <sstream>
namespace gl
{
Shader::Shader(ResourceManager *manager, rx::ShaderImpl *impl, GLenum type, GLuint handle)
: mShader(impl),
mType(type),
mHandle(handle),
mResourceManager(manager),
mRefCount(0),
mDeleteStatus(false),
mCompiled(false)
{
ASSERT(impl);
}
Shader::~Shader()
{
SafeDelete(mShader);
}
GLuint Shader::getHandle() const
{
return mHandle;
}
void Shader::setSource(GLsizei count, const char *const *string, const GLint *length)
{
std::ostringstream stream;
for (int i = 0; i < count; i++)
{
if (length == nullptr || length[i] < 0)
{
stream.write(string[i], std::strlen(string[i]));
}
else
{
stream.write(string[i], length[i]);
}
}
mSource = stream.str();
}
int Shader::getInfoLogLength() const
{
return mShader->getInfoLog().empty() ? 0 : (mShader->getInfoLog().length() + 1);
}
void Shader::getInfoLog(GLsizei bufSize, GLsizei *length, char *infoLog) const
{
int index = 0;
if (bufSize > 0)
{
index = std::min(bufSize - 1, static_cast<GLsizei>(mShader->getInfoLog().length()));
memcpy(infoLog, mShader->getInfoLog().c_str(), index);
infoLog[index] = '\0';
}
if (length)
{
*length = index;
}
}
int Shader::getSourceLength() const
{
return mSource.empty() ? 0 : (mSource.length() + 1);
}
int Shader::getTranslatedSourceLength() const
{
return mShader->getTranslatedSource().empty() ? 0 : (mShader->getTranslatedSource().length() + 1);
}
void Shader::getSourceImpl(const std::string &source, GLsizei bufSize, GLsizei *length, char *buffer)
{
int index = 0;
if (bufSize > 0)
{
index = std::min(bufSize - 1, static_cast<GLsizei>(source.length()));
memcpy(buffer, source.c_str(), index);
buffer[index] = '\0';
}
if (length)
{
*length = index;
}
}
void Shader::getSource(GLsizei bufSize, GLsizei *length, char *buffer) const
{
getSourceImpl(mSource, bufSize, length, buffer);
}
void Shader::getTranslatedSource(GLsizei bufSize, GLsizei *length, char *buffer) const
{
getSourceImpl(mShader->getTranslatedSource(), bufSize, length, buffer);
}
void Shader::getTranslatedSourceWithDebugInfo(GLsizei bufSize, GLsizei *length, char *buffer) const
{
std::string debugInfo(mShader->getDebugInfo());
getSourceImpl(debugInfo, bufSize, length, buffer);
}
void Shader::compile(const gl::Data &data)
{
mCompiled = mShader->compile(data, mSource);
}
void Shader::addRef()
{
mRefCount++;
}
void Shader::release()
{
mRefCount--;
if (mRefCount == 0 && mDeleteStatus)
{
mResourceManager->deleteShader(mHandle);
}
}
unsigned int Shader::getRefCount() const
{
return mRefCount;
}
bool Shader::isFlaggedForDeletion() const
{
return mDeleteStatus;
}
void Shader::flagForDeletion()
{
mDeleteStatus = true;
}
const std::vector<gl::PackedVarying> &Shader::getVaryings() const
{
return mShader->getVaryings();
}
const std::vector<sh::Uniform> &Shader::getUniforms() const
{
return mShader->getUniforms();
}
const std::vector<sh::InterfaceBlock> &Shader::getInterfaceBlocks() const
{
return mShader->getInterfaceBlocks();
}
const std::vector<sh::Attribute> &Shader::getActiveAttributes() const
{
return mShader->getActiveAttributes();
}
const std::vector<sh::Attribute> &Shader::getActiveOutputVariables() const
{
return mShader->getActiveOutputVariables();
}
std::vector<gl::PackedVarying> &Shader::getVaryings()
{
return mShader->getVaryings();
}
std::vector<sh::Uniform> &Shader::getUniforms()
{
return mShader->getUniforms();
}
std::vector<sh::InterfaceBlock> &Shader::getInterfaceBlocks()
{
return mShader->getInterfaceBlocks();
}
std::vector<sh::Attribute> &Shader::getActiveAttributes()
{
return mShader->getActiveAttributes();
}
std::vector<sh::Attribute> &Shader::getActiveOutputVariables()
{
return mShader->getActiveOutputVariables();
}
}
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