xorg-server-1.4/cfb/cfbtegblt.c

   1 /***********************************************************
   2
   3 Copyright 1987, 1998  The Open Group
   4
   5 Permission to use, copy, modify, distribute, and sell this software and its
   6 documentation for any purpose is hereby granted without fee, provided that
   7 the above copyright notice appear in all copies and that both that
   8 copyright notice and this permission notice appear in supporting
   9 documentation.
  10
  11 The above copyright notice and this permission notice shall be included in
  12 all copies or substantial portions of the Software.
  13
  14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
  17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  20
  21 Except as contained in this notice, the name of The Open Group shall not be
  22 used in advertising or otherwise to promote the sale, use or other dealings
  23 in this Software without prior written authorization from The Open Group.
  24
  25
  26 Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
  27
  28                         All Rights Reserved
  29
  30 Permission to use, copy, modify, and distribute this software and its
  31 documentation for any purpose and without fee is hereby granted,
  32 provided that the above copyright notice appear in all copies and that
  33 both that copyright notice and this permission notice appear in
  34 supporting documentation, and that the name of Digital not be
  35 used in advertising or publicity pertaining to distribution of the
  36 software without specific, written prior permission.
  37
  38 DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
  39 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
  40 DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
  41 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  42 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  43 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  44 SOFTWARE.
  45
  46 ******************************************************************/
  47
  48 #ifdef HAVE_DIX_CONFIG_H
  49 #include <dix-config.h>
  50 #endif
  51
  52 #include        <X11/X.h>
  53 #include        <X11/Xmd.h>
  54 #include        <X11/Xproto.h>
  55 #include        "cfb.h"
  56 #include        <X11/fonts/fontstruct.h>
  57 #include        "dixfontstr.h"
  58 #include        "gcstruct.h"
  59 #include        "windowstr.h"
  60 #include        "scrnintstr.h"
  61 #include        "pixmapstr.h"
  62 #include        "regionstr.h"
  63 #include        "cfbmskbits.h"
  64 #include        "mi.h"
  65 #define MFB_CONSTS_ONLY
  66 #include        "maskbits.h"
  67
  68 /*
  69     this works for fonts with glyphs <= 32 bits wide, on an
  70     arbitrarily deep display.  Use cfbTEGlyphBlt8 for 8 bit displays.
  71
  72     This should be called only with a terminal-emulator font;
  73 this means that the FIXED_METRICS flag is set, and that
  74 glyphbounds == charbounds.
  75
  76     in theory, this goes faster; even if it doesn't, it reduces the
  77 flicker caused by writing a string over itself with image text (since
  78 the background gets repainted per character instead of per string.)
  79 this seems to be important for some converted X10 applications.
  80
  81     Image text looks at the bits in the glyph and the fg and bg in the
  82 GC.  it paints a rectangle, as defined in the protocol dcoument,
  83 and the paints the characters.
  84
  85 */
  86
  87 void
  88 cfbTEGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
  89     DrawablePtr pDrawable;
  90     GC          *pGC;
  91     int         x, y;
  92     unsigned int nglyph;
  93     CharInfoPtr *ppci;          /* array of character info */
  94     pointer     pglyphBase;     /* start of array of glyphs */
  95 {
  96     FontPtr     pfont = pGC->font;
  97     int widthDst;
  98     CfbBits *pdstBase;  /* pointer to longword with top row
  99                                    of current glyph */
 100
 101     int w;                      /* width of glyph and char */
 102     int h;                      /* height of glyph and char */
 103     register int xpos=x;        /* current x%32  */
 104     int ypos=y;                 /* current y%32 */
 105     register unsigned char *pglyph;
 106     int widthGlyph;
 107
 108     register CfbBits *pdst;/* pointer to current longword in dst */
 109     int hTmp;                   /* counter for height */
 110     BoxRec bbox;                /* for clipping */
 111
 112     register int wtmp,xtemp,width;
 113     CfbBits bgfill,fgfill,*ptemp,tmpDst1,tmpDst2,*pdtmp;
 114 #if PSZ != 24
 115     int tmpx;
 116 #endif
 117
 118     xpos += pDrawable->x;
 119     ypos += pDrawable->y;
 120
 121     cfbGetLongWidthAndPointer (pDrawable, widthDst, pdstBase)
 122
 123     wtmp = FONTMAXBOUNDS(pfont,characterWidth);
 124     h = FONTASCENT(pfont) + FONTDESCENT(pfont);
 125     widthGlyph = GLYPHWIDTHBYTESPADDED(*ppci);
 126
 127     xpos += FONTMAXBOUNDS(pfont,leftSideBearing);
 128     ypos -= FONTASCENT(pfont);
 129
 130     bbox.x1 = xpos;
 131     bbox.x2 = xpos + (wtmp * nglyph);
 132     bbox.y1 = ypos;
 133     bbox.y2 = ypos + h;
 134
 135     fgfill = PFILL(pGC->fgPixel);
 136     bgfill = PFILL(pGC->bgPixel);
 137
 138     switch (RECT_IN_REGION(pGC->pScreen,  cfbGetCompositeClip(pGC), &bbox))
 139     {
 140       case rgnOUT:
 141         break;
 142       case rgnPART:
 143         /* this is the WRONG thing to do, but it works.
 144            calling the non-terminal text is easy, but slow, given
 145            what we know about the font.
 146
 147            the right thing to do is something like:
 148             for each clip rectangle
 149                 compute at which row the glyph starts to be in it,
 150                    and at which row the glyph ceases to be in it
 151                 compute which is the first glyph inside the left
 152                     edge, and the last one inside the right edge
 153                 draw a fractional first glyph, using only
 154                     the rows we know are in
 155                 draw all the whole glyphs, using the appropriate rows
 156                 draw any pieces of the last glyph, using the right rows
 157
 158            this way, the code would take advantage of knowing that
 159            all glyphs are the same height and don't overlap.
 160
 161            one day...
 162         */
 163         cfbImageGlyphBlt8(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);
 164         break;
 165       case rgnIN:
 166
 167         pdtmp = pdstBase + (widthDst * ypos);
 168         while(nglyph--)
 169         {
 170
 171             pglyph = FONTGLYPHBITS(pglyphBase, *ppci++);
 172             pdst = pdtmp;
 173             hTmp = h;
 174
 175             while (hTmp--)
 176             {
 177                 x = xpos;
 178                 width = wtmp;
 179                 xtemp = 0;
 180
 181                 while (width > 0)
 182                 {
 183 #if PSZ == 24
 184                     w = 1;
 185                     ptemp = (CfbBits *)(pglyph + ((xtemp *3)>> 2));
 186                     getstipplepixels24(ptemp,xtemp,0,&bgfill,&tmpDst1, xtemp);
 187                     getstipplepixels24(ptemp,xtemp,1,&fgfill,&tmpDst2, xtemp);
 188 #else
 189                     tmpx = x & PIM;
 190                     w = min(width, PPW - tmpx);
 191                     w = min(w, (PGSZ - xtemp));
 192                     ptemp = (CfbBits *)(pglyph + (xtemp >> MFB_PWSH));
 193                     getstipplepixels(ptemp,xtemp,w,0,&bgfill,&tmpDst1);
 194                     getstipplepixels(ptemp,xtemp,w,1,&fgfill,&tmpDst2);
 195 #endif
 196
 197                     {
 198                         CfbBits tmpDst = tmpDst1 | tmpDst2;
 199 #if PSZ == 24
 200                         CfbBits *pdsttmp = pdst + ((x*3) >> 2);
 201                         putbits24(tmpDst,w,pdsttmp,pGC->planemask,x);
 202 #else
 203                         CfbBits *pdsttmp = pdst + (x >> PWSH);
 204                         putbits(tmpDst,tmpx,w,pdsttmp,pGC->planemask);
 205 #endif
 206                     }
 207                     x += w;
 208                     xtemp += w;
 209                     width -= w;
 210                 }
 211                 pglyph += widthGlyph;
 212                 pdst += widthDst;
 213             }
 214             xpos += wtmp;
 215         }
 216         break;
 217     }
 218 }