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//
// Copyright (c) 2002-2012 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.
//
// VertexBuffer.h: Defines the abstract VertexBuffer class and VertexBufferInterface
// class with derivations, classes that perform graphics API agnostic vertex buffer operations.
#ifndef LIBANGLE_RENDERER_D3D_VERTEXBUFFER_H_
#define LIBANGLE_RENDERER_D3D_VERTEXBUFFER_H_
#include "common/angleutils.h"
#include "libANGLE/Error.h"
#include <GLES2/gl2.h>
#include <cstddef>
#include <cstdint>
#include <vector>
namespace gl
{
struct VertexAttribute;
struct VertexAttribCurrentValueData;
}
namespace rx
{
class BufferFactoryD3D;
class VertexBuffer : angle::NonCopyable
{
public:
VertexBuffer();
virtual ~VertexBuffer();
virtual gl::Error initialize(unsigned int size, bool dynamicUsage) = 0;
virtual gl::Error storeVertexAttributes(const gl::VertexAttribute &attrib,
GLenum currentValueType,
GLint start,
GLsizei count,
GLsizei instances,
unsigned int offset,
const uint8_t *sourceData) = 0;
virtual gl::Error getSpaceRequired(const gl::VertexAttribute &attrib, GLsizei count, GLsizei instances,
unsigned int *outSpaceRequired) const = 0;
virtual unsigned int getBufferSize() const = 0;
virtual gl::Error setBufferSize(unsigned int size) = 0;
virtual gl::Error discard() = 0;
unsigned int getSerial() const;
// This may be overridden (e.g. by VertexBuffer11) if necessary.
virtual void hintUnmapResource() { };
protected:
void updateSerial();
private:
unsigned int mSerial;
static unsigned int mNextSerial;
};
class VertexBufferInterface : angle::NonCopyable
{
public:
VertexBufferInterface(BufferFactoryD3D *factory, bool dynamic);
virtual ~VertexBufferInterface();
gl::Error reserveVertexSpace(const gl::VertexAttribute &attribute, GLsizei count, GLsizei instances);
unsigned int getBufferSize() const;
unsigned int getSerial() const;
virtual gl::Error storeVertexAttributes(const gl::VertexAttribute &attrib,
GLenum currentValueType,
GLint start,
GLsizei count,
GLsizei instances,
unsigned int *outStreamOffset,
const uint8_t *sourceData);
bool directStoragePossible(const gl::VertexAttribute &attrib,
GLenum currentValueType) const;
VertexBuffer* getVertexBuffer() const;
protected:
virtual gl::Error reserveSpace(unsigned int size) = 0;
unsigned int getWritePosition() const;
void setWritePosition(unsigned int writePosition);
gl::Error discard();
gl::Error setBufferSize(unsigned int size);
private:
BufferFactoryD3D *const mFactory;
VertexBuffer* mVertexBuffer;
unsigned int mWritePosition;
unsigned int mReservedSpace;
bool mDynamic;
};
class StreamingVertexBufferInterface : public VertexBufferInterface
{
public:
StreamingVertexBufferInterface(BufferFactoryD3D *factory, std::size_t initialSize);
~StreamingVertexBufferInterface();
protected:
gl::Error reserveSpace(unsigned int size);
};
class StaticVertexBufferInterface : public VertexBufferInterface
{
public:
explicit StaticVertexBufferInterface(BufferFactoryD3D *factory);
~StaticVertexBufferInterface();
gl::Error storeVertexAttributes(const gl::VertexAttribute &attrib,
GLenum currentValueType,
GLint start,
GLsizei count,
GLsizei instances,
unsigned int *outStreamOffset,
const uint8_t *sourceData) override;
bool lookupAttribute(const gl::VertexAttribute &attribute, unsigned int* outStreamFffset);
// If a static vertex buffer is committed then no more attribute data can be added to it
// A new static vertex buffer should be created instead
void commit();
bool isCommitted() { return mIsCommitted; }
protected:
gl::Error reserveSpace(unsigned int size);
private:
struct VertexElement
{
GLenum type;
GLuint size;
GLuint stride;
bool normalized;
bool pureInteger;
size_t attributeOffset;
unsigned int streamOffset;
};
bool mIsCommitted;
std::vector<VertexElement> mCache;
};
}
#endif // LIBANGLE_RENDERER_D3D_VERTEXBUFFER_H_
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