michael@0: /*
michael@0:  * Copyright 2013 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef GrGLBufferImpl_DEFINED
michael@0: #define GrGLBufferImpl_DEFINED
michael@0: 
michael@0: #include "SkTypes.h"
michael@0: #include "gl/GrGLFunctions.h"
michael@0: 
michael@0: class GrGpuGL;
michael@0: 
michael@0: /**
michael@0:  * This class serves as the implementation of GrGL*Buffer classes. It was written to avoid code
michael@0:  * duplication in those classes.
michael@0:  */
michael@0: class GrGLBufferImpl : public SkNoncopyable {
michael@0: public:
michael@0:     struct Desc {
michael@0:         bool        fIsWrapped;
michael@0:         GrGLuint    fID;            // set to 0 to indicate buffer is CPU-backed and not a VBO.
michael@0:         size_t      fSizeInBytes;
michael@0:         bool        fDynamic;
michael@0:     };
michael@0: 
michael@0:     GrGLBufferImpl(GrGpuGL*, const Desc&, GrGLenum bufferType);
michael@0:     ~GrGLBufferImpl() {
michael@0:         // either release or abandon should have been called by the owner of this object.
michael@0:         SkASSERT(0 == fDesc.fID);
michael@0:     }
michael@0: 
michael@0:     void abandon();
michael@0:     void release(GrGpuGL* gpu);
michael@0: 
michael@0:     GrGLuint bufferID() const { return fDesc.fID; }
michael@0:     size_t baseOffset() const { return reinterpret_cast<size_t>(fCPUData); }
michael@0: 
michael@0:     void bind(GrGpuGL* gpu) const;
michael@0: 
michael@0:     void* lock(GrGpuGL* gpu);
michael@0:     void* lockPtr() const { return fLockPtr; }
michael@0:     void unlock(GrGpuGL* gpu);
michael@0:     bool isLocked() const;
michael@0:     bool updateData(GrGpuGL* gpu, const void* src, size_t srcSizeInBytes);
michael@0: 
michael@0: private:
michael@0:     void validate() const;
michael@0: 
michael@0:     Desc         fDesc;
michael@0:     GrGLenum     fBufferType; // GL_ARRAY_BUFFER or GL_ELEMENT_ARRAY_BUFFER
michael@0:     void*        fCPUData;
michael@0:     void*        fLockPtr;
michael@0: 
michael@0:     typedef SkNoncopyable INHERITED;
michael@0: };
michael@0: 
michael@0: #endif