xorg-server-1.4/mi/miglblt.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
  49 #ifdef HAVE_DIX_CONFIG_H
  50 #include <dix-config.h>
  51 #endif
  52
  53 #include        <X11/X.h>
  54 #include        <X11/Xmd.h>
  55 #include        <X11/Xproto.h>
  56 #include        "misc.h"
  57 #include        <X11/fonts/fontstruct.h>
  58 #include        "dixfontstr.h"
  59 #include        "gcstruct.h"
  60 #include        "windowstr.h"
  61 #include        "scrnintstr.h"
  62 #include        "pixmap.h"
  63 #include        "servermd.h"
  64 #include        "mi.h"
  65
  66 /*
  67     machine-independent glyph blt.
  68     assumes that glyph bits in snf are written in bytes,
  69 have same bit order as the server's bitmap format,
  70 and are byte padded.  this corresponds to the snf distributed
  71 with the sample server.
  72
  73     get a scratch GC.
  74     in the scratch GC set alu = GXcopy, fg = 1, bg = 0
  75     allocate a bitmap big enough to hold the largest glyph in the font
  76     validate the scratch gc with the bitmap
  77     for each glyph
  78         carefully put the bits of the glyph in a buffer,
  79             padded to the server pixmap scanline padding rules
  80         fake a call to PutImage from the buffer into the bitmap
  81         use the bitmap in a call to PushPixels
  82 */
  83
  84 _X_EXPORT void
  85 miPolyGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
  86     DrawablePtr pDrawable;
  87     GC          *pGC;
  88     int          x, y;
  89     unsigned int nglyph;
  90     CharInfoPtr *ppci;          /* array of character info */
  91     pointer      pglyphBase;    /* start of array of glyphs */
  92 {
  93     int width, height;
  94     PixmapPtr pPixmap;
  95     int nbyLine;                /* bytes per line of padded pixmap */
  96     FontPtr pfont;
  97     GCPtr pGCtmp;
  98     int i;
  99     int j;
 100     unsigned char *pbits;       /* buffer for PutImage */
 101     unsigned char *pb;          /* temp pointer into buffer */
 102     CharInfoPtr pci;            /* currect char info */
 103     unsigned char *pglyph;      /* pointer bits in glyph */
 104     int gWidth, gHeight;        /* width and height of glyph */
 105     int nbyGlyphWidth;          /* bytes per scanline of glyph */
 106     int nbyPadGlyph;            /* server padded line of glyph */
 107
 108     XID gcvals[3];
 109
 110     if (pGC->miTranslate)
 111     {
 112         x += pDrawable->x;
 113         y += pDrawable->y;
 114     }
 115
 116     pfont = pGC->font;
 117     width = FONTMAXBOUNDS(pfont,rightSideBearing) -
 118             FONTMINBOUNDS(pfont,leftSideBearing);
 119     height = FONTMAXBOUNDS(pfont,ascent) +
 120              FONTMAXBOUNDS(pfont,descent);
 121
 122     pPixmap = (*pDrawable->pScreen->CreatePixmap)(pDrawable->pScreen,
 123                                                   width, height, 1);
 124     if (!pPixmap)
 125         return;
 126
 127     pGCtmp = GetScratchGC(1, pDrawable->pScreen);
 128     if (!pGCtmp)
 129     {
 130         (*pDrawable->pScreen->DestroyPixmap)(pPixmap);
 131         return;
 132     }
 133
 134     gcvals[0] = GXcopy;
 135     gcvals[1] = 1;
 136     gcvals[2] = 0;
 137
 138     DoChangeGC(pGCtmp, GCFunction|GCForeground|GCBackground, gcvals, 0);
 139
 140     nbyLine = BitmapBytePad(width);
 141     pbits = (unsigned char *)ALLOCATE_LOCAL(height*nbyLine);
 142     if (!pbits)
 143     {
 144         (*pDrawable->pScreen->DestroyPixmap)(pPixmap);
 145         FreeScratchGC(pGCtmp);
 146         return;
 147     }
 148     while(nglyph--)
 149     {
 150         pci = *ppci++;
 151         pglyph = FONTGLYPHBITS(pglyphBase, pci);
 152         gWidth = GLYPHWIDTHPIXELS(pci);
 153         gHeight = GLYPHHEIGHTPIXELS(pci);
 154         if (gWidth && gHeight)
 155         {
 156             nbyGlyphWidth = GLYPHWIDTHBYTESPADDED(pci);
 157             nbyPadGlyph = BitmapBytePad(gWidth);
 158
 159             if (nbyGlyphWidth == nbyPadGlyph
 160 #if GLYPHPADBYTES != 4
 161                 && (((int) pglyph) & 3) == 0
 162 #endif
 163                 )
 164             {
 165                 pb = pglyph;
 166             }
 167             else
 168             {
 169                 for (i=0, pb = pbits; i<gHeight; i++, pb = pbits+(i*nbyPadGlyph))
 170                     for (j = 0; j < nbyGlyphWidth; j++)
 171                         *pb++ = *pglyph++;
 172                 pb = pbits;
 173             }
 174
 175             if ((pGCtmp->serialNumber) != (pPixmap->drawable.serialNumber))
 176                 ValidateGC((DrawablePtr)pPixmap, pGCtmp);
 177             (*pGCtmp->ops->PutImage)((DrawablePtr)pPixmap, pGCtmp,
 178                                 pPixmap->drawable.depth,
 179                                 0, 0, gWidth, gHeight,
 180                                 0, XYBitmap, (char *)pb);
 181
 182             if ((pGC->serialNumber) != (pDrawable->serialNumber))
 183                 ValidateGC(pDrawable, pGC);
 184             (*pGC->ops->PushPixels)(pGC, pPixmap, pDrawable,
 185                                gWidth, gHeight,
 186                                x + pci->metrics.leftSideBearing,
 187                                y - pci->metrics.ascent);
 188         }
 189         x += pci->metrics.characterWidth;
 190     }
 191     (*pDrawable->pScreen->DestroyPixmap)(pPixmap);
 192     DEALLOCATE_LOCAL(pbits);
 193     FreeScratchGC(pGCtmp);
 194 }
 195
 196
 197 _X_EXPORT void
 198 miImageGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
 199     DrawablePtr pDrawable;
 200     GC          *pGC;
 201     int          x, y;
 202     unsigned int nglyph;
 203     CharInfoPtr *ppci;          /* array of character info */
 204     pointer      pglyphBase;    /* start of array of glyphs */
 205 {
 206     ExtentInfoRec info;         /* used by QueryGlyphExtents() */
 207     XID gcvals[3];
 208     int oldAlu, oldFS;
 209     unsigned long       oldFG;
 210     xRectangle backrect;
 211
 212     QueryGlyphExtents(pGC->font, ppci, (unsigned long)nglyph, &info);
 213
 214     if (info.overallWidth >= 0)
 215     {
 216         backrect.x = x;
 217         backrect.width = info.overallWidth;
 218     }
 219     else
 220     {
 221         backrect.x = x + info.overallWidth;
 222         backrect.width = -info.overallWidth;
 223     }
 224     backrect.y = y - FONTASCENT(pGC->font);
 225     backrect.height = FONTASCENT(pGC->font) + FONTDESCENT(pGC->font);
 226
 227     oldAlu = pGC->alu;
 228     oldFG = pGC->fgPixel;
 229     oldFS = pGC->fillStyle;
 230
 231     /* fill in the background */
 232     gcvals[0] = GXcopy;
 233     gcvals[1] = pGC->bgPixel;
 234     gcvals[2] = FillSolid;
 235     DoChangeGC(pGC, GCFunction|GCForeground|GCFillStyle, gcvals, 0);
 236     ValidateGC(pDrawable, pGC);
 237     (*pGC->ops->PolyFillRect)(pDrawable, pGC, 1, &backrect);
 238
 239     /* put down the glyphs */
 240     gcvals[0] = oldFG;
 241     DoChangeGC(pGC, GCForeground, gcvals, 0);
 242     ValidateGC(pDrawable, pGC);
 243     (*pGC->ops->PolyGlyphBlt)(pDrawable, pGC, x, y, nglyph, ppci,
 244                               pglyphBase);
 245
 246     /* put all the toys away when done playing */
 247     gcvals[0] = oldAlu;
 248     gcvals[1] = oldFG;
 249     gcvals[2] = oldFS;
 250     DoChangeGC(pGC, GCFunction|GCForeground|GCFillStyle, gcvals, 0);
 251     ValidateGC(pDrawable, pGC);
 252
 253 }