include/state/cr_current.h

/* Copyright (c) 2001, Stanford University
 * All rights reserved.
 *
 * See the file LICENSE.txt for information on redistributing this software.
 */

#ifndef CR_STATE_CURRENT_H
#define CR_STATE_CURRENT_H

#include "state/cr_currentpointers.h"

#include <iprt/cdefs.h>

#ifdef __cplusplus
extern "C" {
#endif


#define VERT_ATTRIB_POS      0
#define VERT_ATTRIB_WEIGHT   1
#define VERT_ATTRIB_NORMAL   2
#define VERT_ATTRIB_COLOR0   3
#define VERT_ATTRIB_COLOR1   4
#define VERT_ATTRIB_FOG      5
#define VERT_ATTRIB_SIX      6
#define VERT_ATTRIB_SEVEN    7
#define VERT_ATTRIB_TEX0     8
#define VERT_ATTRIB_TEX1     9
#define VERT_ATTRIB_TEX2     10
#define VERT_ATTRIB_TEX3     11
#define VERT_ATTRIB_TEX4     12
#define VERT_ATTRIB_TEX5     13
#define VERT_ATTRIB_TEX6     14
#define VERT_ATTRIB_TEX7     15
#define VERT_ATTRIB_MAX      16


typedef struct {
    CRbitvalue  dirty[CR_MAX_BITARRAY];
    /* Regardless of NV_vertex_program, we use this array */
    CRbitvalue  vertexAttrib[CR_MAX_VERTEX_ATTRIBS][CR_MAX_BITARRAY];
    CRbitvalue  edgeFlag[CR_MAX_BITARRAY];
    CRbitvalue  colorIndex[CR_MAX_BITARRAY];
    CRbitvalue  rasterPos[CR_MAX_BITARRAY];
} CRCurrentBits;


typedef struct {
    /* Pre-transform values */
    /* Regardless of NV_vertex_program, we use this array */
    GLfloat   attrib[CR_MAX_VERTEX_ATTRIBS][4];
    GLboolean edgeFlag;
    GLfloat   colorIndex;
    /* Post-transform values */
    GLvectorf   eyePos;
    GLvectorf   clipPos;
    GLvectorf   winPos;
} CRVertex;


typedef struct {
    /* Regardless of NV_vertex_program, we use this array */
    GLfloat  vertexAttrib[CR_MAX_VERTEX_ATTRIBS][4];
    GLfloat  vertexAttribPre[CR_MAX_VERTEX_ATTRIBS][4];

    CRCurrentStatePointers   *current;

    GLboolean    rasterValid;
    GLfloat      rasterAttrib[CR_MAX_VERTEX_ATTRIBS][4];
    GLfloat      rasterAttribPre[CR_MAX_VERTEX_ATTRIBS][4];

    GLdouble     rasterIndex;
    GLboolean    edgeFlag;
    GLboolean    edgeFlagPre;
    GLfloat      colorIndex;
    GLfloat      colorIndexPre;

    /* XXX this isn't really "current" state - move someday */
    GLuint       attribsUsedMask;  /* for ARB_vertex_program */
    GLboolean    inBeginEnd;
    GLenum       mode;
    GLuint       beginEndMax;
    GLuint       beginEndNum;
    GLuint       flushOnEnd;

} CRCurrentState;

DECLEXPORT(void) crStateCurrentInit( CRContext *ctx );

DECLEXPORT(void) crStateCurrentRecover( void );

DECLEXPORT(void) crStateCurrentRecoverNew(CRContext *g, CRCurrentStatePointers  *current);

DECLEXPORT(void) crStateCurrentDiff(CRCurrentBits *bb, CRbitvalue *bitID,
                                    CRContext *fromCtx, CRContext *toCtx);
DECLEXPORT(void) crStateCurrentSwitch(CRCurrentBits *bb, CRbitvalue *bitID,
                                    CRContext *fromCtx, CRContext *toCtx);

DECLEXPORT(void) crStateRasterPosUpdate(GLfloat x, GLfloat y, GLfloat z, GLfloat w);

DECLEXPORT(GLuint) crStateNeedDummyZeroVertexArray(CRContext *g, CRCurrentStatePointers  *current, GLfloat *pZva);

#ifdef __cplusplus
}
#endif

#endif /* CR_STATE_CURRENT_H */