source: vbox/trunk/src/VBox/Additions/x11/x11include/xorg-server-1.16.0/regionstr.h@ 87454

/***********************************************************

Copyright 1987, 1998  The Open Group

Permission to use, copy, modify, distribute, and sell this software and its
documentation for any purpose is hereby granted without fee, provided that
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Except as contained in this notice, the name of The Open Group shall not be
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in this Software without prior written authorization from The Open Group.

Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.

                        All Rights Reserved

Permission to use, copy, modify, and distribute this software and its
documentation for any purpose and without fee is hereby granted,
provided that the above copyright notice appear in all copies and that
both that copyright notice and this permission notice appear in
supporting documentation, and that the name of Digital not be
used in advertising or publicity pertaining to distribution of the
software without specific, written prior permission.

DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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******************************************************************/

#ifndef REGIONSTRUCT_H
#define REGIONSTRUCT_H

typedef struct pixman_region16 RegionRec, *RegionPtr;

#include "miscstruct.h"

/* Return values from RectIn() */

#define rgnOUT 0
#define rgnIN  1
#define rgnPART 2

#define NullRegion ((RegionPtr)0)

/*
 *   clip region
 */

typedef struct pixman_region16_data RegDataRec, *RegDataPtr;

extern _X_EXPORT BoxRec RegionEmptyBox;
extern _X_EXPORT RegDataRec RegionEmptyData;
extern _X_EXPORT RegDataRec RegionBrokenData;
static inline Bool
RegionNil(RegionPtr reg)
{
    return ((reg)->data && !(reg)->data->numRects);
}

/* not a region */

static inline Bool
RegionNar(RegionPtr reg)
{
    return ((reg)->data == &RegionBrokenData);
}

static inline int
RegionNumRects(RegionPtr reg)
{
    return ((reg)->data ? (reg)->data->numRects : 1);
}

static inline int
RegionSize(RegionPtr reg)
{
    return ((reg)->data ? (reg)->data->size : 0);
}

static inline BoxPtr
RegionRects(RegionPtr reg)
{
    return ((reg)->data ? (BoxPtr) ((reg)->data + 1) : &(reg)->extents);
}

static inline BoxPtr
RegionBoxptr(RegionPtr reg)
{
    return ((BoxPtr) ((reg)->data + 1));
}

static inline BoxPtr
RegionBox(RegionPtr reg, int i)
{
    return (&RegionBoxptr(reg)[i]);
}

static inline BoxPtr
RegionTop(RegionPtr reg)
{
    return RegionBox(reg, (reg)->data->numRects);
}

static inline BoxPtr
RegionEnd(RegionPtr reg)
{
    return RegionBox(reg, (reg)->data->numRects - 1);
}

static inline size_t
RegionSizeof(int n)
{
    return (sizeof(RegDataRec) + ((n) * sizeof(BoxRec)));
}

static inline void
RegionInit(RegionPtr _pReg, BoxPtr _rect, int _size)
{
    if ((_rect) != NULL) {
        (_pReg)->extents = *(_rect);
        (_pReg)->data = (RegDataPtr) NULL;
    }
    else {
        (_pReg)->extents = RegionEmptyBox;
        if (((_size) > 1) && ((_pReg)->data =
                              (RegDataPtr) malloc(RegionSizeof(_size)))) {
            (_pReg)->data->size = (_size);
            (_pReg)->data->numRects = 0;
        }
        else
            (_pReg)->data = &RegionEmptyData;
    }
}

static inline Bool
RegionInitBoxes(RegionPtr pReg, BoxPtr boxes, int nBoxes)
{
    return pixman_region_init_rects(pReg, boxes, nBoxes);
}

static inline void
RegionUninit(RegionPtr _pReg)
{
    if ((_pReg)->data && (_pReg)->data->size) {
        free((_pReg)->data);
        (_pReg)->data = NULL;
    }
}

static inline void
RegionReset(RegionPtr _pReg, BoxPtr _pBox)
{
    (_pReg)->extents = *(_pBox);
    RegionUninit(_pReg);
    (_pReg)->data = (RegDataPtr) NULL;
}

static inline Bool
RegionNotEmpty(RegionPtr _pReg)
{
    return !RegionNil(_pReg);
}

static inline Bool
RegionBroken(RegionPtr _pReg)
{
    return RegionNar(_pReg);
}

static inline void
RegionEmpty(RegionPtr _pReg)
{
    RegionUninit(_pReg);
    (_pReg)->extents.x2 = (_pReg)->extents.x1;
    (_pReg)->extents.y2 = (_pReg)->extents.y1;
    (_pReg)->data = &RegionEmptyData;
}

static inline BoxPtr
RegionExtents(RegionPtr _pReg)
{
    return (&(_pReg)->extents);
}

static inline void
RegionNull(RegionPtr _pReg)
{
    (_pReg)->extents = RegionEmptyBox;
    (_pReg)->data = &RegionEmptyData;
}

extern _X_EXPORT void InitRegions(void);

extern _X_EXPORT RegionPtr RegionCreate(BoxPtr /*rect */ ,
                                        int /*size */ );

extern _X_EXPORT void RegionDestroy(RegionPtr /*pReg */ );

extern _X_EXPORT RegionPtr RegionDuplicate(RegionPtr /* pOld */);

static inline Bool
RegionCopy(RegionPtr dst, RegionPtr src)
{
    return pixman_region_copy(dst, src);
}

static inline Bool
RegionIntersect(RegionPtr newReg,       /* destination Region */
                RegionPtr reg1, RegionPtr reg2  /* source regions     */
    )
{
    return pixman_region_intersect(newReg, reg1, reg2);
}

static inline Bool
RegionUnion(RegionPtr newReg,   /* destination Region */
            RegionPtr reg1, RegionPtr reg2      /* source regions     */
    )
{
    return pixman_region_union(newReg, reg1, reg2);
}

extern _X_EXPORT Bool RegionAppend(RegionPtr /*dstrgn */ ,
                                   RegionPtr /*rgn */ );

extern _X_EXPORT Bool RegionValidate(RegionPtr /*badreg */ ,
                                     Bool * /*pOverlap */ );

extern _X_EXPORT RegionPtr RegionFromRects(int /*nrects */ ,
                                           xRectanglePtr /*prect */ ,
                                           int /*ctype */ );

/*-
 *-----------------------------------------------------------------------
 * Subtract --
 *      Subtract regS from regM and leave the result in regD.
 *      S stands for subtrahend, M for minuend and D for difference.
 *
 * Results:
 *      TRUE if successful.
 *
 * Side Effects:
 *      regD is overwritten.
 *
 *-----------------------------------------------------------------------
 */
static inline Bool
RegionSubtract(RegionPtr regD, RegionPtr regM, RegionPtr regS)
{
    return pixman_region_subtract(regD, regM, regS);
}

/*-
 *-----------------------------------------------------------------------
 * Inverse --
 *      Take a region and a box and return a region that is everything
 *      in the box but not in the region. The careful reader will note
 *      that this is the same as subtracting the region from the box...
 *
 * Results:
 *      TRUE.
 *
 * Side Effects:
 *      newReg is overwritten.
 *
 *-----------------------------------------------------------------------
 */

static inline Bool
RegionInverse(RegionPtr newReg, /* Destination region */
              RegionPtr reg1,   /* Region to invert */
              BoxPtr invRect    /* Bounding box for inversion */
    )
{
    return pixman_region_inverse(newReg, reg1, invRect);
}

static inline int
RegionContainsRect(RegionPtr region, BoxPtr prect)
{
    return pixman_region_contains_rectangle(region, prect);
}

/* TranslateRegion(pReg, x, y)
   translates in place
*/

static inline void
RegionTranslate(RegionPtr pReg, int x, int y)
{
    pixman_region_translate(pReg, x, y);
}

extern _X_EXPORT Bool RegionBreak(RegionPtr /*pReg */ );

static inline Bool
RegionContainsPoint(RegionPtr pReg, int x, int y, BoxPtr box    /* "return" value */
    )
{
    return pixman_region_contains_point(pReg, x, y, box);
}

static inline Bool
RegionEqual(RegionPtr reg1, RegionPtr reg2)
{
    return pixman_region_equal(reg1, reg2);
}

extern _X_EXPORT Bool RegionRectAlloc(RegionPtr /*pRgn */ ,
                                      int       /*n */
    );

#ifdef DEBUG
extern _X_EXPORT Bool RegionIsValid(RegionPtr   /*prgn */
    );
#endif

extern _X_EXPORT void RegionPrint(RegionPtr /*pReg */ );

#define INCLUDE_LEGACY_REGION_DEFINES
#ifdef INCLUDE_LEGACY_REGION_DEFINES

#define REGION_NIL                              RegionNil
#define REGION_NAR                              RegionNar
#define REGION_NUM_RECTS                        RegionNumRects
#define REGION_SIZE                             RegionSize
#define REGION_RECTS                            RegionRects
#define REGION_BOXPTR                           RegionBoxptr
#define REGION_BOX                              RegionBox
#define REGION_TOP                              RegionTop
#define REGION_END                              RegionEnd
#define REGION_SZOF                             RegionSizeof
#define BITMAP_TO_REGION                        BitmapToRegion
#define REGION_CREATE(pScreen, r, s)            RegionCreate(r,s)
#define REGION_COPY(pScreen, d, r)              RegionCopy(d, r)
#define REGION_DESTROY(pScreen, r)              RegionDestroy(r)
#define REGION_INTERSECT(pScreen, res, r1, r2)  RegionIntersect(res, r1, r2)
#define REGION_UNION(pScreen, res, r1, r2)      RegionUnion(res, r1, r2)
#define REGION_SUBTRACT(pScreen, res, r1, r2)   RegionSubtract(res, r1, r2)
#define REGION_INVERSE(pScreen, n, r, b)        RegionInverse(n, r, b)
#define REGION_TRANSLATE(pScreen, r, x, y)      RegionTranslate(r, x, y)
#define RECT_IN_REGION(pScreen, r, b)           RegionContainsRect(r, b)
#define POINT_IN_REGION(pScreen, r, x, y, b)    RegionContainsPoint(r, x, y, b)
#define REGION_EQUAL(pScreen, r1, r2)           RegionEqual(r1, r2)
#define REGION_APPEND(pScreen, d, r)            RegionAppend(d, r)
#define REGION_VALIDATE(pScreen, r, o)          RegionValidate(r, o)
#define RECTS_TO_REGION(pScreen, n, r, c)       RegionFromRects(n, r, c)
#define REGION_BREAK(pScreen, r)                RegionBreak(r)
#define REGION_INIT(pScreen, r, b, s)           RegionInit(r, b, s)
#define REGION_UNINIT(pScreen, r)               RegionUninit(r)
#define REGION_RESET(pScreen, r, b)             RegionReset(r, b)
#define REGION_NOTEMPTY(pScreen, r)             RegionNotEmpty(r)
#define REGION_BROKEN(pScreen, r)               RegionBroken(r)
#define REGION_EMPTY(pScreen, r)                RegionEmpty(r)
#define REGION_EXTENTS(pScreen, r)              RegionExtents(r)
#define REGION_NULL(pScreen, r)                 RegionNull(r)

#endif                          /* INCLUDE_LEGACY_REGION_DEFINES */
#endif                          /* REGIONSTRUCT_H */