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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_STENCIL_H
#define CR_STATE_STENCIL_H
#include "cr_glstate.h"
#include "state/cr_statetypes.h"
#include <iprt/cdefs.h>
#include <iprt/assert.h>
#ifdef __cplusplus
extern "C" {
#endif
#define CRSTATE_STENCIL_BUFFER_ID_FRONT 0
#define CRSTATE_STENCIL_BUFFER_ID_BACK 1
#define CRSTATE_STENCIL_BUFFER_ID_TWO_SIDE_BACK 2
#define CRSTATE_STENCIL_BUFFER_COUNT 3
/* stencil buffer settings were accessed with StencilXxx with ActiveStencilFaceEXT == GL_FRONT or StencilXxxSeparate(GL_FRONT_AND_BACK) */
#define CRSTATE_STENCIL_BUFFER_REF_ID_FRONT_AND_BACK 0
/* stencil buffer settings were accessed with StencilXxxSeparate(GL_FRONT_FRONT) */
#define CRSTATE_STENCIL_BUFFER_REF_ID_FRONT 1
/* stencil buffer settings were accessed with StencilXxxSeparate(GL_FRONT_BACK) */
#define CRSTATE_STENCIL_BUFFER_REF_ID_BACK 2
/* stencil buffer settings were accessed with StencilXxx with ActiveStencilFaceEXT == GL_BACK */
#define CRSTATE_STENCIL_BUFFER_REF_ID_TWO_SIDE_BACK 3
#define CRSTATE_STENCIL_BUFFER_REF_COUNT 4
typedef struct {
CRbitvalue dirty[CR_MAX_BITARRAY];
CRbitvalue enable[CR_MAX_BITARRAY];
CRbitvalue func[CR_MAX_BITARRAY];
CRbitvalue op[CR_MAX_BITARRAY];
CRbitvalue clearValue[CR_MAX_BITARRAY];
CRbitvalue writeMask[CR_MAX_BITARRAY];
} CRStencilBits_v_33;
typedef struct {
CRbitvalue func[CR_MAX_BITARRAY];
CRbitvalue op[CR_MAX_BITARRAY];
} CRStencilBufferRefBits;
typedef struct {
CRbitvalue dirty[CR_MAX_BITARRAY];
CRbitvalue enable[CR_MAX_BITARRAY];
CRbitvalue enableTwoSideEXT[CR_MAX_BITARRAY];
CRbitvalue activeStencilFace[CR_MAX_BITARRAY];
CRbitvalue clearValue[CR_MAX_BITARRAY];
CRbitvalue writeMask[CR_MAX_BITARRAY];
/* note: here we use _BUFFER_REF_ rather than _REF_ because we track the way buffers are accessed here,
* to ensure the correct function is called on hw->chromium state restoration,
* i.e. we want to avoid always calling StencilXxxSeparate, but call StencilXxx when it was actually called */
CRStencilBufferRefBits bufferRefs[CRSTATE_STENCIL_BUFFER_REF_COUNT];
} CRStencilBits;
typedef struct {
GLboolean stencilTest;
GLenum func;
GLint mask;
GLint ref;
GLenum fail;
GLenum passDepthFail;
GLenum passDepthPass;
GLint clearValue;
GLint writeMask;
} CRStencilState_v_33;
typedef struct {
GLenum func;
GLint mask;
GLint ref;
GLenum fail;
GLenum passDepthFail;
GLenum passDepthPass;
} CRStencilBufferState;
typedef struct {
/* true if stencil test is enabled */
GLboolean stencilTest;
/* true if GL_EXT_stencil_two_side is enabled (glEnable(GL_STENCIL_TEST_TWO_SIDE_EXT)) */
GLboolean stencilTwoSideEXT;
/* GL_FRONT or GL_BACK */
GLenum activeStencilFace;
GLint clearValue;
GLint writeMask;
CRStencilBufferState buffers[CRSTATE_STENCIL_BUFFER_COUNT];
} CRStencilState;
DECLEXPORT(void) crStateStencilInit(CRContext *ctx);
DECLEXPORT(void) crStateStencilBufferInit(CRStencilBufferState *s);
DECLEXPORT(void) crStateStencilDiff(CRStencilBits *bb, CRbitvalue *bitID,
CRContext *fromCtx, CRContext *toCtx);
DECLEXPORT(void) crStateStencilSwitch(CRStencilBits *bb, CRbitvalue *bitID,
CRContext *fromCtx, CRContext *toCtx);
#ifdef __cplusplus
}
#endif
#endif /* CR_STATE_STENCIL_H */
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