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Diffstat (limited to 'xorg-server/mfb/mfbclip.c')
-rw-r--r--xorg-server/mfb/mfbclip.c280
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diff --git a/xorg-server/mfb/mfbclip.c b/xorg-server/mfb/mfbclip.c
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index 48e532aa8..000000000
--- a/xorg-server/mfb/mfbclip.c
+++ /dev/null
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-/***********************************************************
-
-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
-the above copyright notice appear in all copies and that both that
-copyright notice and this permission notice appear in supporting
-documentation.
-
-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
-OPEN GROUP 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 Open Group 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 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
-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 "regionstr.h"
-#include "pixmapstr.h"
-#include "scrnintstr.h"
-#include "regionstr.h"
-#include "gc.h"
-#include "maskbits.h"
-#include "mi.h"
-#include "mfb.h"
-
-#define ADDRECT(reg,r,fr,rx1,ry1,rx2,ry2) \
-if (((rx1) < (rx2)) && ((ry1) < (ry2)) && \
- (!((reg)->data->numRects && \
- ((r-1)->y1 == (ry1)) && \
- ((r-1)->y2 == (ry2)) && \
- ((r-1)->x1 <= (rx1)) && \
- ((r-1)->x2 >= (rx2))))) \
-{ \
- if ((reg)->data->numRects == (reg)->data->size) \
- { \
- miRectAlloc(reg, 1); \
- fr = REGION_BOXPTR(reg); \
- r = fr + (reg)->data->numRects; \
- } \
- r->x1 = (rx1); \
- r->y1 = (ry1); \
- r->x2 = (rx2); \
- r->y2 = (ry2); \
- (reg)->data->numRects++; \
- if(r->x1 < (reg)->extents.x1) \
- (reg)->extents.x1 = r->x1; \
- if(r->x2 > (reg)->extents.x2) \
- (reg)->extents.x2 = r->x2; \
- r++; \
-}
-
-/* Convert bitmap clip mask into clipping region.
- * First, goes through each line and makes boxes by noting the transitions
- * from 0 to 1 and 1 to 0.
- * Then it coalesces the current line with the previous if they have boxes
- * at the same X coordinates.
- */
-RegionPtr
-mfbPixmapToRegion(pPix)
- PixmapPtr pPix;
-{
- register RegionPtr pReg;
- register PixelType *pw, w;
- register int ib;
- int width, h, base, rx1 = 0, crects;
- PixelType *pwLineEnd;
- int irectPrevStart, irectLineStart;
- register BoxPtr prectO, prectN;
- BoxPtr FirstRect, rects, prectLineStart;
- Bool fInBox, fSame;
- register PixelType mask0 = mask[0];
- PixelType *pwLine;
- int nWidth;
-
- pReg = REGION_CREATE(pPix->drawable.pScreen, NULL, 1);
- if(!pReg)
- return NullRegion;
- FirstRect = REGION_BOXPTR(pReg);
- rects = FirstRect;
-
- pwLine = (PixelType *) pPix->devPrivate.ptr;
- nWidth = pPix->devKind / PGSZB;
-
- width = pPix->drawable.width;
- pReg->extents.x1 = width - 1;
- pReg->extents.x2 = 0;
- irectPrevStart = -1;
- for(h = 0; h < pPix->drawable.height; h++)
- {
- pw = pwLine;
- pwLine += nWidth;
- irectLineStart = rects - FirstRect;
- /* If the Screen left most bit of the word is set, we're starting in
- * a box */
- if(*pw & mask0)
- {
- fInBox = TRUE;
- rx1 = 0;
- }
- else
- fInBox = FALSE;
- /* Process all words which are fully in the pixmap */
- pwLineEnd = pw + (width >> PWSH);
- for (base = 0; pw < pwLineEnd; base += PPW)
- {
- w = *pw++;
- if (fInBox)
- {
- if (!~w)
- continue;
- }
- else
- {
- if (!w)
- continue;
- }
- for(ib = 0; ib < PPW; ib++)
- {
- /* If the Screen left most bit of the word is set, we're
- * starting a box */
- if(w & mask0)
- {
- if(!fInBox)
- {
- rx1 = base + ib;
- /* start new box */
- fInBox = TRUE;
- }
- }
- else
- {
- if(fInBox)
- {
- /* end box */
- ADDRECT(pReg, rects, FirstRect,
- rx1, h, base + ib, h + 1);
- fInBox = FALSE;
- }
- }
- /* Shift the word VISUALLY left one. */
- w = SCRLEFT(w, 1);
- }
- }
- if(width & PIM)
- {
- /* Process final partial word on line */
- w = *pw++;
- for(ib = 0; ib < (width & PIM); ib++)
- {
- /* If the Screen left most bit of the word is set, we're
- * starting a box */
- if(w & mask0)
- {
- if(!fInBox)
- {
- rx1 = base + ib;
- /* start new box */
- fInBox = TRUE;
- }
- }
- else
- {
- if(fInBox)
- {
- /* end box */
- ADDRECT(pReg, rects, FirstRect,
- rx1, h, base + ib, h + 1);
- fInBox = FALSE;
- }
- }
- /* Shift the word VISUALLY left one. */
- w = SCRLEFT(w, 1);
- }
- }
- /* If scanline ended with last bit set, end the box */
- if(fInBox)
- {
- ADDRECT(pReg, rects, FirstRect,
- rx1, h, base + (width & PIM), h + 1);
- }
- /* if all rectangles on this line have the same x-coords as
- * those on the previous line, then add 1 to all the previous y2s and
- * throw away all the rectangles from this line
- */
- fSame = FALSE;
- if(irectPrevStart != -1)
- {
- crects = irectLineStart - irectPrevStart;
- if(crects == ((rects - FirstRect) - irectLineStart))
- {
- prectO = FirstRect + irectPrevStart;
- prectN = prectLineStart = FirstRect + irectLineStart;
- fSame = TRUE;
- while(prectO < prectLineStart)
- {
- if((prectO->x1 != prectN->x1) || (prectO->x2 != prectN->x2))
- {
- fSame = FALSE;
- break;
- }
- prectO++;
- prectN++;
- }
- if (fSame)
- {
- prectO = FirstRect + irectPrevStart;
- while(prectO < prectLineStart)
- {
- prectO->y2 += 1;
- prectO++;
- }
- rects -= crects;
- pReg->data->numRects -= crects;
- }
- }
- }
- if(!fSame)
- irectPrevStart = irectLineStart;
- }
- if (!pReg->data->numRects)
- pReg->extents.x1 = pReg->extents.x2 = 0;
- else
- {
- pReg->extents.y1 = REGION_BOXPTR(pReg)->y1;
- pReg->extents.y2 = REGION_END(pReg)->y2;
- if (pReg->data->numRects == 1)
- {
- xfree(pReg->data);
- pReg->data = (RegDataPtr)NULL;
- }
- }
-#ifdef DEBUG
- if (!miValidRegion(pReg))
- FatalError("Assertion failed file %s, line %d: expr\n", __FILE__, __LINE__);
-#endif
- return(pReg);
-}
-
-mfbPixmapToRegionProc *
-mfbPixmapToRegionWeak(void)
-{
- return mfbPixmapToRegion;
-}
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