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//
// Copyright (c) 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.
//
#include "libANGLE/TransformFeedback.h"
#include "libANGLE/Buffer.h"
#include "libANGLE/Caps.h"
#include "libANGLE/ContextState.h"
#include "libANGLE/Program.h"
#include "libANGLE/renderer/GLImplFactory.h"
#include "libANGLE/renderer/TransformFeedbackImpl.h"
namespace gl
{
TransformFeedbackState::TransformFeedbackState(size_t maxIndexedBuffers)
: mLabel(),
mActive(false),
mPrimitiveMode(GL_NONE),
mPaused(false),
mProgram(nullptr),
mGenericBuffer(),
mIndexedBuffers(maxIndexedBuffers)
{
}
TransformFeedbackState::~TransformFeedbackState()
{
}
const BindingPointer<Buffer> &TransformFeedbackState::getGenericBuffer() const
{
return mGenericBuffer;
}
const OffsetBindingPointer<Buffer> &TransformFeedbackState::getIndexedBuffer(size_t idx) const
{
return mIndexedBuffers[idx];
}
const std::vector<OffsetBindingPointer<Buffer>> &TransformFeedbackState::getIndexedBuffers() const
{
return mIndexedBuffers;
}
TransformFeedback::TransformFeedback(rx::GLImplFactory *implFactory, GLuint id, const Caps &caps)
: RefCountObject(id),
mState(caps.maxTransformFeedbackSeparateAttributes),
mImplementation(implFactory->createTransformFeedback(mState))
{
ASSERT(mImplementation != nullptr);
}
Error TransformFeedback::onDestroy(const Context *context)
{
if (mState.mProgram)
{
mState.mProgram->release(context);
mState.mProgram = nullptr;
}
ASSERT(!mState.mProgram);
mState.mGenericBuffer.set(context, nullptr);
for (size_t i = 0; i < mState.mIndexedBuffers.size(); i++)
{
mState.mIndexedBuffers[i].set(context, nullptr);
}
return NoError();
}
TransformFeedback::~TransformFeedback()
{
SafeDelete(mImplementation);
}
void TransformFeedback::setLabel(const std::string &label)
{
mState.mLabel = label;
}
const std::string &TransformFeedback::getLabel() const
{
return mState.mLabel;
}
void TransformFeedback::begin(const Context *context, GLenum primitiveMode, Program *program)
{
mState.mActive = true;
mState.mPrimitiveMode = primitiveMode;
mState.mPaused = false;
mImplementation->begin(primitiveMode);
bindProgram(context, program);
}
void TransformFeedback::end(const Context *context)
{
mState.mActive = false;
mState.mPrimitiveMode = GL_NONE;
mState.mPaused = false;
mImplementation->end();
if (mState.mProgram)
{
mState.mProgram->release(context);
mState.mProgram = nullptr;
}
}
void TransformFeedback::pause()
{
mState.mPaused = true;
mImplementation->pause();
}
void TransformFeedback::resume()
{
mState.mPaused = false;
mImplementation->resume();
}
bool TransformFeedback::isActive() const
{
return mState.mActive;
}
bool TransformFeedback::isPaused() const
{
return mState.mPaused;
}
GLenum TransformFeedback::getPrimitiveMode() const
{
return mState.mPrimitiveMode;
}
void TransformFeedback::bindProgram(const Context *context, Program *program)
{
if (mState.mProgram != program)
{
if (mState.mProgram != nullptr)
{
mState.mProgram->release(context);
}
mState.mProgram = program;
if (mState.mProgram != nullptr)
{
mState.mProgram->addRef();
}
}
}
bool TransformFeedback::hasBoundProgram(GLuint program) const
{
return mState.mProgram != nullptr && mState.mProgram->id() == program;
}
void TransformFeedback::bindGenericBuffer(const Context *context, Buffer *buffer)
{
mState.mGenericBuffer.set(context, buffer);
mImplementation->bindGenericBuffer(mState.mGenericBuffer);
}
void TransformFeedback::detachBuffer(const Context *context, GLuint bufferName)
{
for (size_t index = 0; index < mState.mIndexedBuffers.size(); index++)
{
if (mState.mIndexedBuffers[index].id() == bufferName)
{
mState.mIndexedBuffers[index].set(context, nullptr);
mImplementation->bindIndexedBuffer(index, mState.mIndexedBuffers[index]);
}
}
if (mState.mGenericBuffer.id() == bufferName)
{
mState.mGenericBuffer.set(context, nullptr);
mImplementation->bindGenericBuffer(mState.mGenericBuffer);
}
}
const BindingPointer<Buffer> &TransformFeedback::getGenericBuffer() const
{
return mState.mGenericBuffer;
}
void TransformFeedback::bindIndexedBuffer(const Context *context,
size_t index,
Buffer *buffer,
size_t offset,
size_t size)
{
ASSERT(index < mState.mIndexedBuffers.size());
mState.mIndexedBuffers[index].set(context, buffer, offset, size);
mImplementation->bindIndexedBuffer(index, mState.mIndexedBuffers[index]);
}
const OffsetBindingPointer<Buffer> &TransformFeedback::getIndexedBuffer(size_t index) const
{
ASSERT(index < mState.mIndexedBuffers.size());
return mState.mIndexedBuffers[index];
}
size_t TransformFeedback::getIndexedBufferCount() const
{
return mState.mIndexedBuffers.size();
}
rx::TransformFeedbackImpl *TransformFeedback::getImplementation()
{
return mImplementation;
}
const rx::TransformFeedbackImpl *TransformFeedback::getImplementation() const
{
return mImplementation;
}
}
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