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-/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
-/***********************************************************
-
-Copyright (c) 1987 X Consortium
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-X CONSORTIUM BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of the X Consortium shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from the X Consortium.
-
-
-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
-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
-DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
-SOFTWARE.
-
-******************************************************************/
-
-#ifdef HAVE_DIX_CONFIG_H
-#include <dix-config.h>
-#endif
-
-#include <stdlib.h>
-
-#include <X11/X.h>
-#include <X11/Xprotostr.h>
-
-#include "regionstr.h"
-#include "gcstruct.h"
-#include "windowstr.h"
-#include "pixmapstr.h"
-#include "scrnintstr.h"
-
-#include "mi.h"
-
-#include "afb.h"
-#include "maskbits.h"
-
-/* CopyArea and CopyPlane for a monchrome frame buffer
-
-
- clip the source rectangle to the source's available bits. (this
-avoids copying unnecessary pieces that will just get exposed anyway.)
-this becomes the new shape of the destination.
- clip the destination region to the composite clip in the
-GC. this requires translating the destination region to (dstx, dsty).
- build a list of source points, one for each rectangle in the
-destination. this is a simple translation.
- go do the multiple rectangle copies
- do graphics exposures
-*/
-/** Optimized for drawing pixmaps into windows, especially when drawing into
- ** unobscured windows. Calls to the general-purpose region code were
- ** replaced with rectangle-to-rectangle clipping comparisions. This is
- ** possible, since the pixmap is a single rectangle. In an unobscured
- ** window, the destination clip is also a single rectangle, and region
- ** code can be avoided entirely. This is a big savings, since the region
- ** code uses XAlloc() and makes many function calls.
- **
- ** In addition, if source is a pixmap, there is no need to call the
- ** expensive miHandleExposures() routine. Instead, we simply return NULL.
- **
- ** Previously, drawing a pixmap into an unobscured window executed at least
- ** 8 XAlloc()'s, 30 function calls, and hundreds of lines of code.
- **
- ** Now, the same operation requires no XAlloc()'s, no region function calls,
- ** and much less overhead. Nice for drawing lots of small pixmaps.
- */
-
-void
-afbDoBitblt(DrawablePtr pSrc, DrawablePtr pDst, int alu, RegionPtr prgnDst, DDXPointPtr pptSrc, long unsigned int planemask)
-{
- switch (alu) {
- case GXcopy:
- afbDoBitbltCopy(pSrc, pDst, alu, prgnDst, pptSrc, planemask);
- break;
- case GXxor:
- afbDoBitbltXor(pSrc, pDst, alu, prgnDst, pptSrc, planemask);
- break;
- case GXcopyInverted:
- afbDoBitbltCopyInverted(pSrc, pDst, alu, prgnDst, pptSrc, planemask);
- break;
- case GXor:
- afbDoBitbltOr(pSrc, pDst, alu, prgnDst, pptSrc, planemask);
- break;
- default:
- afbDoBitbltGeneral(pSrc, pDst, alu, prgnDst, pptSrc, planemask);
- break;
- }
-}
-
-typedef void (*afb_blit_func)
- (DrawablePtr, DrawablePtr, int, RegionPtr, DDXPointPtr, unsigned long);
-
-static RegionPtr
-afbBitBlt(register DrawablePtr pSrcDrawable, register DrawablePtr pDstDrawable, register GC *pGC, int srcx, int srcy, int width, int height, int dstx, int dsty, afb_blit_func doBitBlt, long unsigned int planemask)
-{
- RegionPtr prgnSrcClip = NULL; /* may be a new region, or just a copy */
- Bool freeSrcClip = FALSE;
-
- RegionPtr prgnExposed;
- RegionRec rgnDst;
- DDXPointPtr pptSrc;
- register DDXPointPtr ppt;
- register BoxPtr pbox;
- int i;
- register int dx;
- register int dy;
- xRectangle origSource;
- DDXPointRec origDest;
- int numRects;
- BoxRec fastBox;
- 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 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)xalloc(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->alu, &rgnDst, pptSrc,
- planemask);
-
- xfree(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, (unsigned long)0);
- }
- REGION_UNINIT(pGC->pScreen, &rgnDst);
- if (freeSrcClip)
- REGION_DESTROY(pGC->pScreen, prgnSrcClip);
- return prgnExposed;
-}
-
-RegionPtr
-afbCopyArea(DrawablePtr pSrcDrawable, DrawablePtr pDstDrawable, GC *pGC, int srcx, int srcy, int width, int height, int dstx, int dsty)
-{
- afb_blit_func doBitBlt;
-
- switch (pGC->alu) {
- case GXcopy:
- doBitBlt = afbDoBitbltCopy;
- break;
- case GXxor:
- doBitBlt = afbDoBitbltXor;
- break;
- case GXcopyInverted:
- doBitBlt = afbDoBitbltCopyInverted;
- break;
- case GXor:
- doBitBlt = afbDoBitbltOr;
- break;
- default:
- doBitBlt = afbDoBitbltGeneral;
- break;
- }
-
- return(afbBitBlt(pSrcDrawable, pDstDrawable, pGC, srcx, srcy,
- width, height, dstx, dsty, doBitBlt, pGC->planemask));
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 06:53:20 +0000