gfxGLPrimitiveBuffer.h

Engine/source/gfx/gl/gfxGLPrimitiveBuffer.h
Classes:

class
This is a primitive buffer (index buffer to GL users) which uses VBOs.
Detailed Description

 1
 2//-----------------------------------------------------------------------------
 3// Copyright (c) 2012 GarageGames, LLC
 4//
 5// Permission is hereby granted, free of charge, to any person obtaining a copy
 6// of this software and associated documentation files (the "Software"), to
 7// deal in the Software without restriction, including without limitation the
 8// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 9// sell copies of the Software, and to permit persons to whom the Software is
10// furnished to do so, subject to the following conditions:
11//
12// The above copyright notice and this permission notice shall be included in
13// all copies or substantial portions of the Software.
14//
15// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21// IN THE SOFTWARE.
22//-----------------------------------------------------------------------------
23
24#ifndef _GFXGLPRIMITIVEBUFFER_H_
25#define _GFXGLPRIMITIVEBUFFER_H_
26
27#include "gfx/gfxPrimitiveBuffer.h"
28#include "gfx/gl/util/glFrameAllocatorLockableHelper.h"
29
30/// This is a primitive buffer (index buffer to GL users) which uses VBOs.
31class GFXGLPrimitiveBuffer : public GFXPrimitiveBuffer
32{
33public:
34   GFXGLPrimitiveBuffer(GFXDevice *device, U32 indexCount, U32 primitiveCount, GFXBufferType bufferType);
35   ~GFXGLPrimitiveBuffer();
36
37   virtual void lock(U32 indexStart, U32 indexEnd, void **indexPtr); ///< only write lock are supported
38   virtual void unlock(); ///<
39   virtual void prepare();  ///< binds the buffer
40   virtual void finish(); ///< We're done with this buffer
41
42   virtual void* getBuffer(); ///< returns NULL
43
44   // GFXResource interface
45   virtual void zombify();
46   virtual void resurrect();
47   
48private:
49   /// Handle to our GL buffer object
50   GLuint mBuffer;
51   U32 mBufferOffset;
52   U8* mZombieCache;
53
54   U32 lockedIndexEnd, lockedIndexStart;
55
56   FrameAllocatorLockableHelper mFrameAllocator;
57};
58
59#endif
60