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/* Copyright (c) 2001, Stanford University
* All rights reserved.
*
* See the file LICENSE.txt for information on redistributing this software.
*/
#ifndef CR_STATE_BUFFEROBJECT_H
#define CR_STATE_BUFFEROBJECT_H
#include "cr_hash.h"
#include "state/cr_statetypes.h"
#include "state/cr_statefuncs.h"
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
CRbitvalue dirty[CR_MAX_BITARRAY];
CRbitvalue arrayBinding[CR_MAX_BITARRAY];
CRbitvalue elementsBinding[CR_MAX_BITARRAY];
CRbitvalue packBinding[CR_MAX_BITARRAY];
CRbitvalue unpackBinding[CR_MAX_BITARRAY];
} CRBufferObjectBits;
/*
* Buffer object, like a texture object, but encapsulates arbitrary
* data (vertex, image, etc).
*/
typedef struct {
GLuint refCount;
GLuint id;
GLuint hwid;
GLenum usage;
GLenum access;
GLuint size; /* buffer size in bytes */
GLvoid *pointer; /* only valid while buffer is mapped */
GLvoid *data; /* the buffer data, if retainBufferData is true */
GLboolean bResyncOnRead; /* buffer data could be changed on server side,
so we need to resync every time guest wants to read from it*/
CRbitvalue dirty[CR_MAX_BITARRAY]; /* dirty data or state */
GLintptrARB dirtyStart, dirtyLength; /* dirty region */
/* bitfield representing the object usage. 1 means the object is used by the context with the given bitid */
CRbitvalue ctxUsage[CR_MAX_BITARRAY];
} CRBufferObject;
typedef struct {
GLboolean retainBufferData; /* should state tracker retain buffer data? */
CRBufferObject *arrayBuffer;
CRBufferObject *elementsBuffer;
CRBufferObject *packBuffer;
CRBufferObject *unpackBuffer;
CRBufferObject *nullBuffer; /* name = 0 */
} CRBufferObjectState;
DECLEXPORT(CRBufferObject *) crStateGetBoundBufferObject(GLenum target, CRBufferObjectState *b);
DECLEXPORT(GLboolean) crStateIsBufferBound(GLenum target);
struct CRContext;
DECLEXPORT(GLboolean) crStateIsBufferBoundForCtx(struct CRContext *g, GLenum target);
DECLEXPORT(GLuint) STATE_APIENTRY crStateBufferHWIDtoID(GLuint hwid);
DECLEXPORT(GLuint) STATE_APIENTRY crStateGetBufferHWID(GLuint id);
DECLEXPORT(void) crStateRegBuffers(GLsizei n, GLuint *buffers);
#ifdef __cplusplus
}
#endif
#endif /* CR_STATE_BUFFEROBJECT_H */
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