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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_OCCLUSION_H
#define CR_OCCLUSION_H
#include "cr_hash.h"
#include "state/cr_statetypes.h"
#include <iprt/cdefs.h>
#ifdef __cplusplus
extern "C" {
#endif
typedef struct {
CRbitvalue dirty[CR_MAX_BITARRAY];
} CROcclusionBits;
/*
* Occlusion query object.
*/
typedef struct {
GLenum target;
GLuint name;
GLuint refCount;
GLuint passedCounter;
GLboolean active;
CRbitvalue dirty[CR_MAX_BITARRAY]; /* dirty data or state */
GLintptrARB dirtyStart, dirtyLength; /* dirty region */
} CROcclusionObject;
typedef struct {
CRHashTable *objects;
GLuint currentQueryObject;
} CROcclusionState;
DECLEXPORT(void) crStateOcclusionInit(CRContext *ctx);
DECLEXPORT(void) crStateOcclusionDestroy(CRContext *ctx);
DECLEXPORT(void) crStateOcclusionDiff(CROcclusionBits *bb, CRbitvalue *bitID,
CRContext *fromCtx, CRContext *toCtx);
DECLEXPORT(void) crStateOcclusionSwitch(CROcclusionBits *bb, CRbitvalue *bitID,
CRContext *fromCtx, CRContext *toCtx);
#ifdef __cplusplus
}
#endif
#endif /* CR_OCCLUSION_H */
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