93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
|
/*
|
||
|
|
Copyright 2010 Google Inc.
|
||
|
|
|
||
|
|
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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
|
||
|
|
#ifndef GrVertexBuffer_DEFINED
|
||
|
|
#define GrVertexBuffer_DEFINED
|
||
|
|
|
||
|
|
#include "GrRefCnt.h"
|
||
|
|
|
||
|
|
class GrVertexBuffer : public GrRefCnt {
|
||
|
|
protected:
|
||
|
|
GrVertexBuffer(uint32_t sizeInBytes, bool dynamic) :
|
||
|
|
fSizeInBytes(sizeInBytes),
|
||
|
|
fDynamic(dynamic) {}
|
||
|
|
public:
|
||
|
|
virtual ~GrVertexBuffer() {}
|
||
|
|
|
||
|
|
/**
|
||
|
|
Retrieves the size of the vertex buffer
|
||
|
|
|
||
|
|
@return the size of the vertex buffer in bytes
|
||
|
|
*/
|
||
|
|
uint32_t size() { return fSizeInBytes; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
Retrieves whether the vertex buffer was created with the dynamic flag
|
||
|
|
|
||
|
|
@return true if the vertex buffer was created with the dynamic flag
|
||
|
|
*/
|
||
|
|
bool dynamic() const { return fDynamic; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
Indicates that GPU context in which this veretx buffer was created is
|
||
|
|
destroyed and that Ganesh should not attempt to free the texture with the
|
||
|
|
underlying API.
|
||
|
|
*/
|
||
|
|
virtual void abandon() = 0;
|
||
|
|
|
||
|
|
/**
|
||
|
|
Locks the vertex buffer to be written by the CPU.
|
||
|
|
|
||
|
|
The previous content of the vertex buffer is invalidated. It is an error to
|
||
|
|
draw whil the buffer is locked. It is an error to call lock on an already
|
||
|
|
locked vertex buffer.
|
||
|
|
|
||
|
|
@return a pointer to the vertex data or NULL if the lock fails.
|
||
|
|
*/
|
||
|
|
virtual void* lock() = 0;
|
||
|
|
|
||
|
|
/**
|
||
|
|
Unlocks the vertex buffer.
|
||
|
|
|
||
|
|
The pointer returned by the previous lock call will no longer be valid.
|
||
|
|
*/
|
||
|
|
virtual void unlock() = 0;
|
||
|
|
|
||
|
|
/**
|
||
|
|
Queries whether the vertex buffer has been locked.
|
||
|
|
|
||
|
|
@return true if the vertex buffer is locked, false otherwise.
|
||
|
|
*/
|
||
|
|
virtual bool isLocked() const = 0;
|
||
|
|
|
||
|
|
/**
|
||
|
|
Updates the vertex buffer data.
|
||
|
|
|
||
|
|
The size of the vertex buffer will be preserved. However, only the updated
|
||
|
|
region will have defined contents.
|
||
|
|
|
||
|
|
@return returns true if the update succeeds, false otherwise.
|
||
|
|
*/
|
||
|
|
virtual bool updateData(const void* src, uint32_t srcSizeInBytes) = 0;
|
||
|
|
|
||
|
|
private:
|
||
|
|
uint32_t fSizeInBytes;
|
||
|
|
bool fDynamic;
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|