static void
trim_region (RegionPtr pRegion,
DrawablePtr pDrawable,
int subWindowMode)
{
RegionRec pixClip;
int draw_x = 0;
int draw_y = 0;
#ifdef COMPOSITE
int screen_x = 0, screen_y = 0;
#endif
/* short circuit for empty regions */
if (!REGION_NOTEMPTY(pScreen, pRegion))
return;
#ifdef COMPOSITE
/*
* When drawing to a pixmap which is storing window contents,
* the region presented is in pixmap relative coordinates which
* need to be converted to screen relative coordinates
*/
if (pDrawable->type != DRAWABLE_WINDOW)
{
screen_x = ((PixmapPtr) pDrawable)->screen_x - pDrawable->x;
screen_y = ((PixmapPtr) pDrawable)->screen_y - pDrawable->y;
}
if (screen_x || screen_y)
REGION_TRANSLATE (pScreen, pRegion, screen_x, screen_y);
#endif
/* Clip against any children */
if (pDrawable->type == DRAWABLE_WINDOW &&
((WindowPtr)(pDrawable))->backingStore == NotUseful)
{
if (subWindowMode == ClipByChildren)
{
REGION_INTERSECT(pScreen, pRegion, pRegion,
&((WindowPtr)(pDrawable))->clipList);
}
else if (subWindowMode == IncludeInferiors)
{
RegionPtr pTempRegion =
NotClippedByChildren((WindowPtr)(pDrawable));
REGION_INTERSECT(pScreen, pRegion, pRegion, pTempRegion);
REGION_DESTROY(pScreen, pTempRegion);
}
/* If subWindowMode is set to an invalid value, don't perform
* any drawable-based clipping. */
}
/* Clip against border or pixmap bounds */
if (pDrawable->type == DRAWABLE_WINDOW)
{
REGION_INTERSECT (pScreen, pRegion, pRegion,
&((WindowPtr)(pDrawable))->borderClip);
}
else
{
BoxRec box;
draw_x = pDrawable->x;
draw_y = pDrawable->y;
#ifdef COMPOSITE
/*
* Need to move everyone to screen coordinates
* XXX what about off-screen pixmaps with non-zero x/y?
*/
if (!WindowDrawable(pDrawable->type))
{
draw_x += ((PixmapPtr) pDrawable)->screen_x;
draw_y += ((PixmapPtr) pDrawable)->screen_y;
}
#endif
box.x1 = draw_x;
box.y1 = draw_y;
box.x2 = draw_x + pDrawable->width;
box.y2 = draw_y + pDrawable->height;
REGION_INIT(pScreen, &pixClip, &box, 1);
REGION_INTERSECT (pScreen, pRegion, pRegion, &pixClip);
REGION_UNINIT(pScreen, &pixClip);
}
/*
* Move region to target coordinate space
*/
if (draw_x || draw_y)
REGION_TRANSLATE (pScreen, pRegion, -draw_x, -draw_y);
/* Now do something with the damage */
}
void
miValidatePicture (PicturePtr pPicture,
Mask mask)
{
DrawablePtr pDrawable = pPicture->pDrawable;
if ((mask & (CPClipXOrigin|CPClipYOrigin|CPClipMask|CPSubwindowMode)) ||
(pDrawable->serialNumber != (pPicture->serialNumber & DRAWABLE_SERIAL_BITS)))
{
if (pDrawable->type == DRAWABLE_WINDOW)
{
WindowPtr pWin = (WindowPtr) pDrawable;
RegionPtr pregWin;
Bool freeTmpClip, freeCompClip;
if (pPicture->subWindowMode == IncludeInferiors)
{
pregWin = NotClippedByChildren(pWin);
freeTmpClip = TRUE;
}
else
{
pregWin = &pWin->clipList;
freeTmpClip = FALSE;
}
freeCompClip = pPicture->freeCompClip;
/*
* if there is no client clip, we can get by with just keeping the
* pointer we got, and remembering whether or not should destroy
* (or maybe re-use) it later. this way, we avoid unnecessary
* copying of regions. (this wins especially if many clients clip
* by children and have no client clip.)
*/
if (pPicture->clientClipType == CT_NONE)
{
if (freeCompClip)
RegionDestroy(pPicture->pCompositeClip);
pPicture->pCompositeClip = pregWin;
pPicture->freeCompClip = freeTmpClip;
}
else
{
/*
* we need one 'real' region to put into the composite clip. if
* pregWin the current composite clip are real, we can get rid of
* one. if pregWin is real and the current composite clip isn't,
* use pregWin for the composite clip. if the current composite
* clip is real and pregWin isn't, use the current composite
* clip. if neither is real, create a new region.
*/
RegionTranslate(pPicture->clientClip,
pDrawable->x + pPicture->clipOrigin.x,
pDrawable->y + pPicture->clipOrigin.y);
if (freeCompClip)
{
RegionIntersect(pPicture->pCompositeClip,
pregWin, pPicture->clientClip);
if (freeTmpClip)
RegionDestroy(pregWin);
}
else if (freeTmpClip)
{
RegionIntersect(pregWin, pregWin, pPicture->clientClip);
pPicture->pCompositeClip = pregWin;
}
else
{
pPicture->pCompositeClip = RegionCreate(NullBox, 0);
RegionIntersect(pPicture->pCompositeClip,
pregWin, pPicture->clientClip);
}
pPicture->freeCompClip = TRUE;
RegionTranslate(pPicture->clientClip,
-(pDrawable->x + pPicture->clipOrigin.x),
-(pDrawable->y + pPicture->clipOrigin.y));
}
} /* end of composite clip for a window */
else
{
BoxRec pixbounds;
/* XXX should we translate by drawable.x/y here ? */
/* If you want pixmaps in offscreen memory, yes */
pixbounds.x1 = pDrawable->x;
pixbounds.y1 = pDrawable->y;
pixbounds.x2 = pDrawable->x + pDrawable->width;
pixbounds.y2 = pDrawable->y + pDrawable->height;
if (pPicture->freeCompClip)
{
RegionReset(pPicture->pCompositeClip, &pixbounds);
}
else
{
pPicture->freeCompClip = TRUE;
pPicture->pCompositeClip = RegionCreate(&pixbounds, 1);
}
if (pPicture->clientClipType == CT_REGION)
{
if(pDrawable->x || pDrawable->y) {
RegionTranslate(pPicture->clientClip,
pDrawable->x + pPicture->clipOrigin.x,
pDrawable->y + pPicture->clipOrigin.y);
RegionIntersect(pPicture->pCompositeClip,
pPicture->pCompositeClip, pPicture->clientClip);
RegionTranslate(pPicture->clientClip,
-(pDrawable->x + pPicture->clipOrigin.x),
-(pDrawable->y + pPicture->clipOrigin.y));
} else {
RegionTranslate(pPicture->pCompositeClip,
-pPicture->clipOrigin.x, -pPicture->clipOrigin.y);
RegionIntersect(pPicture->pCompositeClip,
pPicture->pCompositeClip, pPicture->clientClip);
RegionTranslate(pPicture->pCompositeClip,
pPicture->clipOrigin.x, pPicture->clipOrigin.y);
}
}
} /* end of composite clip for pixmap */
}
}
void
miComputeCompositeClip(GCPtr pGC, DrawablePtr pDrawable)
{
if (pDrawable->type == DRAWABLE_WINDOW) {
WindowPtr pWin = (WindowPtr) pDrawable;
RegionPtr pregWin;
Bool freeTmpClip, freeCompClip;
if (pGC->subWindowMode == IncludeInferiors) {
pregWin = NotClippedByChildren(pWin);
freeTmpClip = TRUE;
}
else {
pregWin = &pWin->clipList;
freeTmpClip = FALSE;
}
freeCompClip = pGC->freeCompClip;
/*
* if there is no client clip, we can get by with just keeping the
* pointer we got, and remembering whether or not should destroy (or
* maybe re-use) it later. this way, we avoid unnecessary copying of
* regions. (this wins especially if many clients clip by children
* and have no client clip.)
*/
if (!pGC->clientClip) {
if (freeCompClip)
RegionDestroy(pGC->pCompositeClip);
pGC->pCompositeClip = pregWin;
pGC->freeCompClip = freeTmpClip;
}
else {
/*
* we need one 'real' region to put into the composite clip. if
* pregWin the current composite clip are real, we can get rid of
* one. if pregWin is real and the current composite clip isn't,
* use pregWin for the composite clip. if the current composite
* clip is real and pregWin isn't, use the current composite
* clip. if neither is real, create a new region.
*/
RegionTranslate(pGC->clientClip,
pDrawable->x + pGC->clipOrg.x,
pDrawable->y + pGC->clipOrg.y);
if (freeCompClip) {
RegionIntersect(pGC->pCompositeClip, pregWin, pGC->clientClip);
if (freeTmpClip)
RegionDestroy(pregWin);
}
else if (freeTmpClip) {
RegionIntersect(pregWin, pregWin, pGC->clientClip);
pGC->pCompositeClip = pregWin;
}
else {
pGC->pCompositeClip = RegionCreate(NullBox, 0);
RegionIntersect(pGC->pCompositeClip, pregWin, pGC->clientClip);
}
pGC->freeCompClip = TRUE;
RegionTranslate(pGC->clientClip,
-(pDrawable->x + pGC->clipOrg.x),
-(pDrawable->y + pGC->clipOrg.y));
}
} /* end of composite clip for a window */
else {
BoxRec pixbounds;
/* XXX should we translate by drawable.x/y here ? */
/* If you want pixmaps in offscreen memory, yes */
pixbounds.x1 = pDrawable->x;
pixbounds.y1 = pDrawable->y;
pixbounds.x2 = pDrawable->x + pDrawable->width;
pixbounds.y2 = pDrawable->y + pDrawable->height;
if (pGC->freeCompClip) {
RegionReset(pGC->pCompositeClip, &pixbounds);
}
else {
pGC->freeCompClip = TRUE;
pGC->pCompositeClip = RegionCreate(&pixbounds, 1);
}
if (pGC->clientClip) {
if (pDrawable->x || pDrawable->y) {
RegionTranslate(pGC->clientClip,
pDrawable->x + pGC->clipOrg.x,
pDrawable->y + pGC->clipOrg.y);
RegionIntersect(pGC->pCompositeClip,
pGC->pCompositeClip, pGC->clientClip);
RegionTranslate(pGC->clientClip,
-(pDrawable->x + pGC->clipOrg.x),
-(pDrawable->y + pGC->clipOrg.y));
}
else {
RegionTranslate(pGC->pCompositeClip,
-pGC->clipOrg.x, -pGC->clipOrg.y);
RegionIntersect(pGC->pCompositeClip,
pGC->pCompositeClip, pGC->clientClip);
RegionTranslate(pGC->pCompositeClip,
pGC->clipOrg.x, pGC->clipOrg.y);
}
}
} /* end of composite clip for pixmap */
} /* end miComputeCompositeClip */
RegionPtr
XAABitBlt(
DrawablePtr pSrcDrawable,
DrawablePtr pDstDrawable,
GC *pGC,
int srcx, int srcy,
int width, int height,
int dstx, int dsty,
void (*doBitBlt)(DrawablePtr, DrawablePtr, GCPtr, RegionPtr, DDXPointPtr),
unsigned long bitPlane )
{
RegionPtr prgnSrcClip = NULL; /* may be a new region, or just a copy */
RegionPtr prgnExposed;
Bool freeSrcClip = FALSE;
RegionRec rgnDst;
DDXPointPtr pptSrc, ppt;
DDXPointRec origDest;
BoxPtr pbox;
BoxRec fastBox;
int i, dx, dy, numRects;
xRectangle origSource;
int fastClip = 0; /* for fast clipping with pixmap source */
int fastExpose = 0; /* for fast exposures with pixmap source */
origSource.x = srcx;
origSource.y = srcy;
origSource.width = width;
origSource.height = height;
origDest.x = dstx;
origDest.y = dsty;
if((pSrcDrawable != pDstDrawable) &&
pSrcDrawable->pScreen->SourceValidate) {
(*pSrcDrawable->pScreen->SourceValidate) (
pSrcDrawable, srcx, srcy, width, height);
}
srcx += pSrcDrawable->x;
srcy += pSrcDrawable->y;
/* clip the source */
if (pSrcDrawable->type == DRAWABLE_PIXMAP) {
if ((pSrcDrawable == pDstDrawable) && (pGC->clientClipType == CT_NONE))
prgnSrcClip = pGC->pCompositeClip;
else
fastClip = 1;
} else { /* Window */
if (pGC->subWindowMode == IncludeInferiors) {
if (!((WindowPtr) pSrcDrawable)->parent) {
/*
* special case bitblt from root window in
* IncludeInferiors mode; just like from a pixmap
*/
fastClip = 1;
} else if ((pSrcDrawable == pDstDrawable) &&
(pGC->clientClipType == CT_NONE)) {
prgnSrcClip = pGC->pCompositeClip;
} else {
prgnSrcClip = NotClippedByChildren((WindowPtr)pSrcDrawable);
freeSrcClip = TRUE;
}
} else {
prgnSrcClip = &((WindowPtr)pSrcDrawable)->clipList;
}
}
fastBox.x1 = srcx;
fastBox.y1 = srcy;
fastBox.x2 = srcx + width;
fastBox.y2 = srcy + height;
/* Don't create a source region if we are doing a fast clip */
if (fastClip) {
fastExpose = 1;
/*
* clip the source; if regions extend beyond the source size,
* make sure exposure events get sent
*/
if (fastBox.x1 < pSrcDrawable->x) {
fastBox.x1 = pSrcDrawable->x;
fastExpose = 0;
}
if (fastBox.y1 < pSrcDrawable->y) {
fastBox.y1 = pSrcDrawable->y;
fastExpose = 0;
}
if (fastBox.x2 > pSrcDrawable->x + (int) pSrcDrawable->width) {
fastBox.x2 = pSrcDrawable->x + (int) pSrcDrawable->width;
fastExpose = 0;
}
if (fastBox.y2 > pSrcDrawable->y + (int) pSrcDrawable->height) {
fastBox.y2 = pSrcDrawable->y + (int) pSrcDrawable->height;
fastExpose = 0;
}
} else {
REGION_INIT(pGC->pScreen, &rgnDst, &fastBox, 1);
REGION_INTERSECT(pGC->pScreen, &rgnDst, &rgnDst, prgnSrcClip);
}
dstx += pDstDrawable->x;
dsty += pDstDrawable->y;
if (pDstDrawable->type == DRAWABLE_WINDOW) {
if (!((WindowPtr)pDstDrawable)->realized) {
if (!fastClip)
REGION_UNINIT(pGC->pScreen, &rgnDst);
if (freeSrcClip)
REGION_DESTROY(pGC->pScreen, prgnSrcClip);
return NULL;
}
}
dx = srcx - dstx;
dy = srcy - dsty;
/* Translate and clip the dst to the destination composite clip */
if (fastClip) {
RegionPtr cclip;
/* Translate the region directly */
fastBox.x1 -= dx;
fastBox.x2 -= dx;
fastBox.y1 -= dy;
fastBox.y2 -= dy;
/* If the destination composite clip is one rectangle we can
do the clip directly. Otherwise we have to create a full
blown region and call intersect */
cclip = pGC->pCompositeClip;
if (REGION_NUM_RECTS(cclip) == 1) {
BoxPtr pBox = REGION_RECTS(cclip);
if (fastBox.x1 < pBox->x1) fastBox.x1 = pBox->x1;
if (fastBox.x2 > pBox->x2) fastBox.x2 = pBox->x2;
if (fastBox.y1 < pBox->y1) fastBox.y1 = pBox->y1;
if (fastBox.y2 > pBox->y2) fastBox.y2 = pBox->y2;
/* Check to see if the region is empty */
if (fastBox.x1 >= fastBox.x2 || fastBox.y1 >= fastBox.y2) {
REGION_NULL(pGC->pScreen, &rgnDst);
} else {
REGION_INIT(pGC->pScreen, &rgnDst, &fastBox, 1);
}
} else {
/* We must turn off fastClip now, since we must create
a full blown region. It is intersected with the
composite clip below. */
fastClip = 0;
REGION_INIT(pGC->pScreen, &rgnDst, &fastBox,1);
}
} else {
REGION_TRANSLATE(pGC->pScreen, &rgnDst, -dx, -dy);
}
if (!fastClip) {
REGION_INTERSECT(pGC->pScreen, &rgnDst, &rgnDst,
pGC->pCompositeClip);
}
/* Do bit blitting */
numRects = REGION_NUM_RECTS(&rgnDst);
if (numRects && width && height) {
if(!(pptSrc = (DDXPointPtr)ALLOCATE_LOCAL(numRects *
sizeof(DDXPointRec)))) {
REGION_UNINIT(pGC->pScreen, &rgnDst);
if (freeSrcClip)
REGION_DESTROY(pGC->pScreen, prgnSrcClip);
return NULL;
}
pbox = REGION_RECTS(&rgnDst);
ppt = pptSrc;
for (i = numRects; --i >= 0; pbox++, ppt++) {
ppt->x = pbox->x1 + dx;
ppt->y = pbox->y1 + dy;
}
(*doBitBlt) (pSrcDrawable, pDstDrawable, pGC, &rgnDst, pptSrc);
DEALLOCATE_LOCAL(pptSrc);
}
prgnExposed = NULL;
if (pGC->fExpose) {
/* Pixmap sources generate a NoExposed (we return NULL to do this) */
if (!fastExpose)
prgnExposed = miHandleExposures(pSrcDrawable, pDstDrawable, pGC,
origSource.x, origSource.y,
(int)origSource.width,
(int)origSource.height,
origDest.x, origDest.y, bitPlane);
}
REGION_UNINIT(pGC->pScreen, &rgnDst);
if (freeSrcClip)
REGION_DESTROY(pGC->pScreen, prgnSrcClip);
return prgnExposed;
}
RegionPtr
miDoCopy(DrawablePtr pSrcDrawable,
DrawablePtr pDstDrawable,
GCPtr pGC,
int xIn,
int yIn,
int widthSrc,
int heightSrc,
int xOut, int yOut, miCopyProc copyProc, Pixel bitPlane, void *closure)
{
RegionPtr prgnSrcClip = NULL; /* may be a new region, or just a copy */
Bool freeSrcClip = FALSE;
RegionPtr prgnExposed = NULL;
RegionRec rgnDst;
int dx;
int dy;
int numRects;
int box_x1;
int box_y1;
int box_x2;
int box_y2;
Bool fastSrc = FALSE; /* for fast clipping with pixmap source */
Bool fastDst = FALSE; /* for fast clipping with one rect dest */
Bool fastExpose = FALSE; /* for fast exposures with pixmap source */
/* Short cut for unmapped or fully clipped windows */
if (pDstDrawable->type == DRAWABLE_WINDOW &&
RegionNil(&((WindowPtr)pDstDrawable)->clipList)) {
return NULL;
}
if (pSrcDrawable->pScreen->SourceValidate) {
(*pSrcDrawable->pScreen->SourceValidate) (pSrcDrawable, xIn, yIn,
widthSrc, heightSrc,
pGC->subWindowMode);
}
/* Compute source clip region */
if (pSrcDrawable->type == DRAWABLE_PIXMAP) {
if ((pSrcDrawable == pDstDrawable) && (!pGC->clientClip))
prgnSrcClip = miGetCompositeClip(pGC);
else
fastSrc = TRUE;
}
else {
if (pGC->subWindowMode == IncludeInferiors) {
/*
* XFree86 DDX empties the border clip when the
* VT is inactive, make sure the region isn't empty
*/
if (!((WindowPtr) pSrcDrawable)->parent &&
RegionNotEmpty(&((WindowPtr) pSrcDrawable)->borderClip)) {
/*
* special case bitblt from root window in
* IncludeInferiors mode; just like from a pixmap
*/
fastSrc = TRUE;
}
else if ((pSrcDrawable == pDstDrawable) && (!pGC->clientClip)) {
prgnSrcClip = miGetCompositeClip(pGC);
}
else {
prgnSrcClip = NotClippedByChildren((WindowPtr) pSrcDrawable);
freeSrcClip = TRUE;
}
}
else {
prgnSrcClip = &((WindowPtr) pSrcDrawable)->clipList;
}
}
xIn += pSrcDrawable->x;
yIn += pSrcDrawable->y;
xOut += pDstDrawable->x;
yOut += pDstDrawable->y;
box_x1 = xIn;
box_y1 = yIn;
box_x2 = xIn + widthSrc;
box_y2 = yIn + heightSrc;
dx = xIn - xOut;
dy = yIn - yOut;
/* Don't create a source region if we are doing a fast clip */
if (fastSrc) {
RegionPtr cclip;
fastExpose = TRUE;
/*
* clip the source; if regions extend beyond the source size,
* make sure exposure events get sent
*/
if (box_x1 < pSrcDrawable->x) {
box_x1 = pSrcDrawable->x;
fastExpose = FALSE;
}
if (box_y1 < pSrcDrawable->y) {
box_y1 = pSrcDrawable->y;
fastExpose = FALSE;
}
if (box_x2 > pSrcDrawable->x + (int) pSrcDrawable->width) {
box_x2 = pSrcDrawable->x + (int) pSrcDrawable->width;
fastExpose = FALSE;
}
if (box_y2 > pSrcDrawable->y + (int) pSrcDrawable->height) {
box_y2 = pSrcDrawable->y + (int) pSrcDrawable->height;
fastExpose = FALSE;
}
/* Translate and clip the dst to the destination composite clip */
box_x1 -= dx;
box_x2 -= dx;
box_y1 -= dy;
box_y2 -= dy;
/* If the destination composite clip is one rectangle we can
do the clip directly. Otherwise we have to create a full
blown region and call intersect */
cclip = miGetCompositeClip(pGC);
if (RegionNumRects(cclip) == 1) {
BoxPtr pBox = RegionRects(cclip);
if (box_x1 < pBox->x1)
box_x1 = pBox->x1;
if (box_x2 > pBox->x2)
box_x2 = pBox->x2;
if (box_y1 < pBox->y1)
box_y1 = pBox->y1;
if (box_y2 > pBox->y2)
box_y2 = pBox->y2;
fastDst = TRUE;
}
}
/* Check to see if the region is empty */
if (box_x1 >= box_x2 || box_y1 >= box_y2) {
RegionNull(&rgnDst);
}
else {
BoxRec box;
box.x1 = box_x1;
box.y1 = box_y1;
box.x2 = box_x2;
box.y2 = box_y2;
RegionInit(&rgnDst, &box, 1);
}
/* Clip against complex source if needed */
if (!fastSrc) {
RegionIntersect(&rgnDst, &rgnDst, prgnSrcClip);
RegionTranslate(&rgnDst, -dx, -dy);
}
/* Clip against complex dest if needed */
if (!fastDst) {
RegionIntersect(&rgnDst, &rgnDst, miGetCompositeClip(pGC));
}
/* Do bit blitting */
numRects = RegionNumRects(&rgnDst);
if (numRects && widthSrc && heightSrc)
miCopyRegion(pSrcDrawable, pDstDrawable, pGC,
&rgnDst, dx, dy, copyProc, bitPlane, closure);
/* Pixmap sources generate a NoExposed (we return NULL to do this) */
if (!fastExpose && pGC->fExpose)
prgnExposed = miHandleExposures(pSrcDrawable, pDstDrawable, pGC,
xIn - pSrcDrawable->x,
yIn - pSrcDrawable->y,
widthSrc, heightSrc,
xOut - pDstDrawable->x,
yOut - pDstDrawable->y);
RegionUninit(&rgnDst);
if (freeSrcClip)
RegionDestroy(prgnSrcClip);
return prgnExposed;
}
RegionPtr
miHandleExposures(DrawablePtr pSrcDrawable, DrawablePtr pDstDrawable,
GCPtr pGC, int srcx, int srcy, int width, int height,
int dstx, int dsty)
{
RegionPtr prgnSrcClip; /* drawable-relative source clip */
RegionRec rgnSrcRec;
RegionPtr prgnDstClip; /* drawable-relative dest clip */
RegionRec rgnDstRec;
BoxRec srcBox; /* unclipped source */
RegionRec rgnExposed; /* exposed region, calculated source-
relative, made dst relative to
intersect with visible parts of
dest and send events to client,
and then screen relative to paint
the window background
*/
WindowPtr pSrcWin;
BoxRec expBox = { 0, };
Bool extents;
/* avoid work if we can */
if (!pGC->graphicsExposures && pDstDrawable->type == DRAWABLE_PIXMAP)
return NULL;
srcBox.x1 = srcx;
srcBox.y1 = srcy;
srcBox.x2 = srcx + width;
srcBox.y2 = srcy + height;
if (pSrcDrawable->type != DRAWABLE_PIXMAP) {
BoxRec TsrcBox;
TsrcBox.x1 = srcx + pSrcDrawable->x;
TsrcBox.y1 = srcy + pSrcDrawable->y;
TsrcBox.x2 = TsrcBox.x1 + width;
TsrcBox.y2 = TsrcBox.y1 + height;
pSrcWin = (WindowPtr) pSrcDrawable;
if (pGC->subWindowMode == IncludeInferiors) {
prgnSrcClip = NotClippedByChildren(pSrcWin);
if ((RegionContainsRect(prgnSrcClip, &TsrcBox)) == rgnIN) {
RegionDestroy(prgnSrcClip);
return NULL;
}
}
else {
if ((RegionContainsRect(&pSrcWin->clipList, &TsrcBox)) == rgnIN)
return NULL;
prgnSrcClip = &rgnSrcRec;
RegionNull(prgnSrcClip);
RegionCopy(prgnSrcClip, &pSrcWin->clipList);
}
RegionTranslate(prgnSrcClip, -pSrcDrawable->x, -pSrcDrawable->y);
}
else {
BoxRec box;
if ((srcBox.x1 >= 0) && (srcBox.y1 >= 0) &&
(srcBox.x2 <= pSrcDrawable->width) &&
(srcBox.y2 <= pSrcDrawable->height))
return NULL;
box.x1 = 0;
box.y1 = 0;
box.x2 = pSrcDrawable->width;
box.y2 = pSrcDrawable->height;
prgnSrcClip = &rgnSrcRec;
RegionInit(prgnSrcClip, &box, 1);
pSrcWin = NULL;
}
if (pDstDrawable == pSrcDrawable) {
prgnDstClip = prgnSrcClip;
}
else if (pDstDrawable->type != DRAWABLE_PIXMAP) {
if (pGC->subWindowMode == IncludeInferiors) {
prgnDstClip = NotClippedByChildren((WindowPtr) pDstDrawable);
}
else {
prgnDstClip = &rgnDstRec;
RegionNull(prgnDstClip);
RegionCopy(prgnDstClip, &((WindowPtr) pDstDrawable)->clipList);
}
RegionTranslate(prgnDstClip, -pDstDrawable->x, -pDstDrawable->y);
}
else {
BoxRec box;
box.x1 = 0;
box.y1 = 0;
box.x2 = pDstDrawable->width;
box.y2 = pDstDrawable->height;
prgnDstClip = &rgnDstRec;
RegionInit(prgnDstClip, &box, 1);
}
/* drawable-relative source region */
RegionInit(&rgnExposed, &srcBox, 1);
/* now get the hidden parts of the source box */
RegionSubtract(&rgnExposed, &rgnExposed, prgnSrcClip);
/* move them over the destination */
RegionTranslate(&rgnExposed, dstx - srcx, dsty - srcy);
/* intersect with visible areas of dest */
RegionIntersect(&rgnExposed, &rgnExposed, prgnDstClip);
/* intersect with client clip region. */
if (pGC->clientClip)
RegionIntersect(&rgnExposed, &rgnExposed, pGC->clientClip);
/*
* If we have LOTS of rectangles, we decide to take the extents
* and force an exposure on that. This should require much less
* work overall, on both client and server. This is cheating, but
* isn't prohibited by the protocol ("spontaneous combustion" :-)
* for windows.
*/
extents = pGC->graphicsExposures &&
(RegionNumRects(&rgnExposed) > RECTLIMIT) &&
(pDstDrawable->type != DRAWABLE_PIXMAP);
if (pSrcWin) {
RegionPtr region;
if (!(region = wClipShape(pSrcWin)))
region = wBoundingShape(pSrcWin);
/*
* If you try to CopyArea the extents of a shaped window, compacting the
* exposed region will undo all our work!
*/
if (extents && pSrcWin && region &&
(RegionContainsRect(region, &srcBox) != rgnIN))
extents = FALSE;
}
if (extents) {
expBox = *RegionExtents(&rgnExposed);
RegionReset(&rgnExposed, &expBox);
}
if ((pDstDrawable->type != DRAWABLE_PIXMAP) &&
(((WindowPtr) pDstDrawable)->backgroundState != None)) {
WindowPtr pWin = (WindowPtr) pDstDrawable;
/* make the exposed area screen-relative */
RegionTranslate(&rgnExposed, pDstDrawable->x, pDstDrawable->y);
if (extents) {
/* PaintWindow doesn't clip, so we have to */
RegionIntersect(&rgnExposed, &rgnExposed, &pWin->clipList);
}
pDstDrawable->pScreen->PaintWindow((WindowPtr) pDstDrawable,
&rgnExposed, PW_BACKGROUND);
if (extents) {
RegionReset(&rgnExposed, &expBox);
}
else
RegionTranslate(&rgnExposed, -pDstDrawable->x, -pDstDrawable->y);
}
if (prgnDstClip == &rgnDstRec) {
RegionUninit(prgnDstClip);
}
else if (prgnDstClip != prgnSrcClip) {
RegionDestroy(prgnDstClip);
}
if (prgnSrcClip == &rgnSrcRec) {
RegionUninit(prgnSrcClip);
}
else {
RegionDestroy(prgnSrcClip);
}
if (pGC->graphicsExposures) {
/* don't look */
RegionPtr exposed = RegionCreate(NullBox, 0);
*exposed = rgnExposed;
return exposed;
}
else {
RegionUninit(&rgnExposed);
return NULL;
}
}
