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- /* $XConsortium: cfbtegblt.c,v 5.4 91/05/04 11:52:53 keith Exp $ */
- /***********************************************************
- Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts,
- and the Massachusetts Institute of Technology, Cambridge, 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 names of Digital or MIT 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.
-
- ******************************************************************/
- #include "X.h"
- #include "Xmd.h"
- #include "Xproto.h"
- #include "cfb.h"
- #include "fontstruct.h"
- #include "dixfontstr.h"
- #include "gcstruct.h"
- #include "windowstr.h"
- #include "scrnintstr.h"
- #include "pixmapstr.h"
- #include "regionstr.h"
- #include "cfbmskbits.h"
-
- extern void miImageGlyphBlt();
-
- /*
- this works for fonts with glyphs <= 32 bits wide, on an
- arbitrarily deep display. Use cfbTEGlyphBlt8 for 8 bit displays.
-
- This should be called only with a terminal-emulator font;
- this means that the FIXED_METRICS flag is set, and that
- glyphbounds == charbounds.
-
- in theory, this goes faster; even if it doesn't, it reduces the
- flicker caused by writing a string over itself with image text (since
- the background gets repainted per character instead of per string.)
- this seems to be important for some converted X10 applications.
-
- Image text looks at the bits in the glyph and the fg and bg in the
- GC. it paints a rectangle, as defined in the protocol dcoument,
- and the paints the characters.
-
- */
-
- void
- cfbTEGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
- DrawablePtr pDrawable;
- GC *pGC;
- int x, y;
- unsigned int nglyph;
- CharInfoPtr *ppci; /* array of character info */
- unsigned char *pglyphBase; /* start of array of glyphs */
- {
- FontPtr pfont = pGC->font;
- int widthDst;
- unsigned long *pdstBase; /* pointer to longword with top row
- of current glyph */
-
- int w; /* width of glyph and char */
- int h; /* height of glyph and char */
- register int xpos=x; /* current x%32 */
- int ypos=y; /* current y%32 */
- register unsigned char *pglyph;
- int widthGlyph;
-
- register unsigned long *pdst;/* pointer to current longword in dst */
- int hTmp; /* counter for height */
- BoxRec bbox; /* for clipping */
-
- register int wtmp,xtemp,width;
- unsigned long bgfill,fgfill,*ptemp,tmpDst1,tmpDst2,*pdtmp;
- int tmpx;
-
- xpos += pDrawable->x;
- ypos += pDrawable->y;
-
- cfbGetLongWidthAndPointer (pDrawable, widthDst, pdstBase)
-
- wtmp = FONTMAXBOUNDS(pfont,characterWidth);
- h = FONTASCENT(pfont) + FONTDESCENT(pfont);
- widthGlyph = GLYPHWIDTHBYTESPADDED(*ppci);
-
- xpos += FONTMAXBOUNDS(pfont,leftSideBearing);
- ypos -= FONTASCENT(pfont);
-
- bbox.x1 = xpos;
- bbox.x2 = xpos + (wtmp * nglyph);
- bbox.y1 = ypos;
- bbox.y2 = ypos + h;
-
- fgfill = PFILL(pGC->fgPixel);
- bgfill = PFILL(pGC->bgPixel);
-
- switch ((*pGC->pScreen->RectIn)(
- ((cfbPrivGC *)(pGC->devPrivates[cfbGCPrivateIndex].ptr))->pCompositeClip, &bbox))
- {
- case rgnOUT:
- break;
- case rgnPART:
- /* this is the WRONG thing to do, but it works.
- calling the non-terminal text is easy, but slow, given
- what we know about the font.
-
- the right thing to do is something like:
- for each clip rectangle
- compute at which row the glyph starts to be in it,
- and at which row the glyph ceases to be in it
- compute which is the first glyph inside the left
- edge, and the last one inside the right edge
- draw a fractional first glyph, using only
- the rows we know are in
- draw all the whole glyphs, using the appropriate rows
- draw any pieces of the last glyph, using the right rows
-
- this way, the code would take advantage of knowing that
- all glyphs are the same height and don't overlap.
-
- one day...
- */
- miImageGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);
- break;
- case rgnIN:
-
- pdtmp = pdstBase + (widthDst * ypos);
- while(nglyph--)
- {
-
- pglyph = FONTGLYPHBITS(pglyphBase, *ppci++);
- pdst = pdtmp;
- hTmp = h;
-
- while (hTmp--)
- {
- x = xpos;
- width = wtmp;
- xtemp = 0;
-
- while (width > 0)
- {
- tmpx = x & PIM;
- w = min(width, PPW - tmpx);
- w = min(w, (32 - xtemp));
-
- ptemp = (unsigned long *)(pglyph + (xtemp >> 5));
- getstipplepixels(ptemp,xtemp,w,0,&bgfill,&tmpDst1);
- getstipplepixels(ptemp,xtemp,w,1,&fgfill,&tmpDst2);
-
- {
- unsigned long tmpDst = tmpDst1 | tmpDst2;
- unsigned long *pdsttmp = pdst + (x >> PWSH);
- putbits(tmpDst,tmpx,w,pdsttmp,pGC->planemask);
- }
- x += w;
- xtemp += w;
- width -= w;
- }
- pglyph += widthGlyph;
- pdst += widthDst;
- }
- xpos += wtmp;
- }
- break;
- }
- }
-