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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.
//
#ifndef LIBANGLE_TRANSFORM_FEEDBACK_H_
#define LIBANGLE_TRANSFORM_FEEDBACK_H_
#include "libANGLE/RefCountObject.h"
#include "common/angleutils.h"
#include "libANGLE/Debug.h"
#include "angle_gl.h"
namespace rx
{
class GLImplFactory;
class TransformFeedbackImpl;
}
namespace gl
{
class Buffer;
struct Caps;
class Context;
class Program;
class TransformFeedbackState final : angle::NonCopyable
{
public:
TransformFeedbackState(size_t maxIndexedBuffers);
~TransformFeedbackState();
const BindingPointer<Buffer> &getGenericBuffer() const;
const OffsetBindingPointer<Buffer> &getIndexedBuffer(size_t idx) const;
const std::vector<OffsetBindingPointer<Buffer>> &getIndexedBuffers() const;
private:
friend class TransformFeedback;
std::string mLabel;
bool mActive;
GLenum mPrimitiveMode;
bool mPaused;
Program *mProgram;
BindingPointer<Buffer> mGenericBuffer;
std::vector<OffsetBindingPointer<Buffer>> mIndexedBuffers;
};
class TransformFeedback final : public RefCountObject, public LabeledObject
{
public:
TransformFeedback(rx::GLImplFactory *implFactory, GLuint id, const Caps &caps);
~TransformFeedback() override;
Error onDestroy(const Context *context) override;
void setLabel(const std::string &label) override;
const std::string &getLabel() const override;
void begin(const Context *context, GLenum primitiveMode, Program *program);
void end(const Context *context);
void pause();
void resume();
bool isActive() const;
bool isPaused() const;
GLenum getPrimitiveMode() const;
bool hasBoundProgram(GLuint program) const;
void bindGenericBuffer(const Context *context, Buffer *buffer);
const BindingPointer<Buffer> &getGenericBuffer() const;
void bindIndexedBuffer(const Context *context,
size_t index,
Buffer *buffer,
size_t offset,
size_t size);
const OffsetBindingPointer<Buffer> &getIndexedBuffer(size_t index) const;
size_t getIndexedBufferCount() const;
void detachBuffer(const Context *context, GLuint bufferName);
rx::TransformFeedbackImpl *getImplementation();
const rx::TransformFeedbackImpl *getImplementation() const;
private:
void bindProgram(const Context *context, Program *program);
TransformFeedbackState mState;
rx::TransformFeedbackImpl* mImplementation;
};
}
#endif // LIBANGLE_TRANSFORM_FEEDBACK_H_
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