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//========= Copyright Valve Corporation, All rights reserved. ============//
//
// cglmprogram.h
// GLMgr buffers (index / vertex)
// ... maybe add PBO later as well
//===============================================================================
#ifndef CGLMBUFFER_H
#define CGLMBUFFER_H
#pragma once
// ext links
// http://www.opengl.org/registry/specs/ARB/vertex_buffer_object.txt
//===============================================================================
// tokens not in the SDK headers
//#ifndef GL_DEPTH_STENCIL_ATTACHMENT_EXT
// #define GL_DEPTH_STENCIL_ATTACHMENT_EXT 0x84F9
//#endif
//===============================================================================
// forward declarations
class GLMContext;
enum EGLMBufferType
{
kGLMVertexBuffer,
kGLMIndexBuffer,
kGLMUniformBuffer, // for bindable uniform
kGLMPixelBuffer, // for PBO
kGLMNumBufferTypes
};
// pass this in "options" to constructor to make a dynamic buffer
#define GLMBufferOptionDynamic 0x00000001
struct GLMBuffLockParams
{
uint m_offset;
uint m_size;
bool m_nonblocking;
bool m_discard;
};
class CGLMBuffer
{
public:
void Lock( GLMBuffLockParams *params, char **addressOut );
void Unlock( void );
//protected:
friend class GLMContext; // only GLMContext can make CGLMBuffer objects
friend class GLMTester;
friend class IDirect3D9;
friend class IDirect3DDevice9;
CGLMBuffer ( GLMContext *ctx, EGLMBufferType type, uint size, uint options );
~CGLMBuffer ( );
void SetModes ( bool asyncMap, bool explicitFlush, bool force = false );
void FlushRange ( uint offset, uint size );
GLMContext *m_ctx; // link back to parent context
EGLMBufferType m_type;
uint m_size;
GLenum m_buffGLTarget; // GL_ARRAY_BUFFER_ARB / GL_ELEMENT_BUFFER_ARB
GLuint m_name; // name of this program in the context
uint m_revision; // bump anytime the size changes or buffer is orphaned
bool m_enableAsyncMap; // mirror of the buffer state
bool m_enableExplicitFlush; // mirror of the buffer state
bool m_bound; // true if bound to context
bool m_mapped; // is it currently mapped
uint m_dirtyMinOffset; // when equal, range is empty
uint m_dirtyMaxOffset;
float *m_lastMappedAddress;
// --------------------- pseudo-VBO support below here (explicitly for dynamic index buffers)
bool m_pseudo; // true if the m_name is 0, and the backing is plain RAM
// in pseudo mode, there is just one RAM buffer that acts as the backing.
// expectation is that this mode would only be used for dynamic indices.
// since indices have to be consumed (copied to command stream) prior to return from a drawing call,
// there's no need to do any fencing or multibuffering. orphaning in particular becomes a no-op.
char *m_pseudoBuf; // storage for pseudo buffer
};
#endif
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