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/* $XFree86: xc/programs/Xserver/hw/xfree86/xaa/xaaBitBlt.c,v 1.3tsi Exp $ */
/*
This is a lighter version of cfbBitBlt. We calculate the boxes
when accelerating pixmap->screen and screen->screen copies.
We also pass the GC to the doBitBlt function so that it has access
to the fg and bg so CopyPlane can use this.
*/
#include "misc.h"
#include "xf86.h"
#include "xf86_ansic.h"
#include "xf86_OSproc.h"
#include "X.h"
#include "mi.h"
#include "pixmapstr.h"
#include "gcstruct.h"
#include "windowstr.h"
#include "xaalocal.h"
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;
}
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