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// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// VertexDataManager.h: Defines the VertexDataManager, a class that
// runs the Buffer translation process.
#ifndef LIBGLES_CM_VERTEXDATAMANAGER_H_
#define LIBGLES_CM_VERTEXDATAMANAGER_H_
#include "Context.h"
#include "Device.hpp"
#include <GLES/gl.h>
namespace es1
{
struct TranslatedAttribute
{
sw::StreamType type;
int count;
bool normalized;
unsigned int offset;
unsigned int stride; // 0 means not to advance the read pointer at all
sw::Resource *vertexBuffer;
};
class VertexBuffer
{
public:
VertexBuffer(unsigned int size);
virtual ~VertexBuffer();
void unmap();
sw::Resource *getResource() const;
protected:
sw::Resource *mVertexBuffer;
};
class ConstantVertexBuffer : public VertexBuffer
{
public:
ConstantVertexBuffer(float x, float y, float z, float w);
~ConstantVertexBuffer();
};
class StreamingVertexBuffer : public VertexBuffer
{
public:
StreamingVertexBuffer(unsigned int size);
~StreamingVertexBuffer();
void *map(const VertexAttribute &attribute, unsigned int requiredSpace, unsigned int *streamOffset);
void reserveRequiredSpace();
void addRequiredSpace(unsigned int requiredSpace);
protected:
unsigned int mBufferSize;
unsigned int mWritePosition;
unsigned int mRequiredSpace;
};
class VertexDataManager
{
public:
VertexDataManager(Context *context);
virtual ~VertexDataManager();
void dirtyCurrentValue(int index) { mDirtyCurrentValue[index] = true; }
GLenum prepareVertexData(GLint start, GLsizei count, TranslatedAttribute *outAttribs);
private:
unsigned int writeAttributeData(StreamingVertexBuffer *vertexBuffer, GLint start, GLsizei count, const VertexAttribute &attribute);
Context *const mContext;
StreamingVertexBuffer *mStreamingBuffer;
bool mDirtyCurrentValue[MAX_VERTEX_ATTRIBS];
ConstantVertexBuffer *mCurrentValueBuffer[MAX_VERTEX_ATTRIBS];
};
}
#endif // LIBGLES_CM_VERTEXDATAMANAGER_H_