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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.
//
// Buffer.h: Defines the gl::Buffer class, representing storage of vertex and/or
// index data. Implements GL buffer objects and related functionality.
// [OpenGL ES 2.0.24] section 2.9 page 21.
#ifndef LIBANGLE_BUFFER_H_
#define LIBANGLE_BUFFER_H_
#include "common/angleutils.h"
#include "libANGLE/Debug.h"
#include "libANGLE/Error.h"
#include "libANGLE/IndexRangeCache.h"
#include "libANGLE/PackedGLEnums.h"
#include "libANGLE/RefCountObject.h"
namespace rx
{
class BufferImpl;
class GLImplFactory;
};
namespace gl
{
class Buffer;
class Context;
class BufferState final : angle::NonCopyable
{
public:
BufferState();
~BufferState();
const std::string &getLabel();
BufferUsage getUsage() const { return mUsage; }
GLbitfield getAccessFlags() const { return mAccessFlags; }
GLenum getAccess() const { return mAccess; }
GLboolean isMapped() const { return mMapped; }
void *getMapPointer() const { return mMapPointer; }
GLint64 getMapOffset() const { return mMapOffset; }
GLint64 getMapLength() const { return mMapLength; }
GLint64 getSize() const { return mSize; }
private:
friend class Buffer;
std::string mLabel;
BufferUsage mUsage;
GLint64 mSize;
GLbitfield mAccessFlags;
GLenum mAccess;
GLboolean mMapped;
void *mMapPointer;
GLint64 mMapOffset;
GLint64 mMapLength;
};
class Buffer final : public RefCountObject, public LabeledObject
{
public:
Buffer(rx::GLImplFactory *factory, GLuint id);
~Buffer() override;
Error onDestroy(const Context *context) override;
void setLabel(const std::string &label) override;
const std::string &getLabel() const override;
Error bufferData(const Context *context,
BufferBinding target,
const void *data,
GLsizeiptr size,
BufferUsage usage);
Error bufferSubData(const Context *context,
BufferBinding target,
const void *data,
GLsizeiptr size,
GLintptr offset);
Error copyBufferSubData(const Context *context,
Buffer *source,
GLintptr sourceOffset,
GLintptr destOffset,
GLsizeiptr size);
Error map(const Context *context, GLenum access);
Error mapRange(const Context *context, GLintptr offset, GLsizeiptr length, GLbitfield access);
Error unmap(const Context *context, GLboolean *result);
void onTransformFeedback();
void onPixelUnpack();
Error getIndexRange(const gl::Context *context,
GLenum type,
size_t offset,
size_t count,
bool primitiveRestartEnabled,
IndexRange *outRange) const;
BufferUsage getUsage() const { return mState.mUsage; }
GLbitfield getAccessFlags() const { return mState.mAccessFlags; }
GLenum getAccess() const { return mState.mAccess; }
GLboolean isMapped() const { return mState.mMapped; }
void *getMapPointer() const { return mState.mMapPointer; }
GLint64 getMapOffset() const { return mState.mMapOffset; }
GLint64 getMapLength() const { return mState.mMapLength; }
GLint64 getSize() const { return mState.mSize; }
rx::BufferImpl *getImplementation() const { return mImpl; }
private:
BufferState mState;
rx::BufferImpl *mImpl;
mutable IndexRangeCache mIndexRangeCache;
};
} // namespace gl
#endif // LIBANGLE_BUFFER_H_
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