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- /***********************************************************
- 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.
-
- ******************************************************************/
-
- /* $XConsortium: miglblt.c,v 5.5 91/07/18 22:53:03 keith Exp $ */
-
- #include "X.h"
- #include "Xmd.h"
- #include "Xproto.h"
- #include "misc.h"
- #include "fontstruct.h"
- #include "dixfontstr.h"
- #include "gcstruct.h"
- #include "windowstr.h"
- #include "scrnintstr.h"
- #include "pixmap.h"
- #include "servermd.h"
-
- extern void QueryGlyphExtents();
-
- /*
- machine-independent glyph blt.
- assumes that glyph bits in snf are written in bytes,
- have same bit order as the server's bitmap format,
- and are byte padded. this corresponds to the snf distributed
- with the sample server.
-
- get a scratch GC.
- in the scratch GC set alu = GXcopy, fg = 1, bg = 0
- allocate a bitmap big enough to hold the largest glyph in the font
- validate the scratch gc with the bitmap
- for each glyph
- carefully put the bits of the glyph in a buffer,
- padded to the server pixmap scanline padding rules
- fake a call to PutImage from the buffer into the bitmap
- use the bitmap in a call to PushPixels
- */
-
- void
- miPolyGlyphBlt(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 */
- {
- int width, height;
- PixmapPtr pPixmap;
- int nbyLine; /* bytes per line of padded pixmap */
- FontPtr pfont;
- GCPtr pGCtmp;
- register int i;
- register int j;
- unsigned char *pbits; /* buffer for PutImage */
- register unsigned char *pb; /* temp pointer into buffer */
- register CharInfoPtr pci; /* currect char info */
- register unsigned char *pglyph; /* pointer bits in glyph */
- int gWidth, gHeight; /* width and height of glyph */
- register int nbyGlyphWidth; /* bytes per scanline of glyph */
- int nbyPadGlyph; /* server padded line of glyph */
-
- XID gcvals[3];
-
- if (pGC->miTranslate)
- {
- x += pDrawable->x;
- y += pDrawable->y;
- }
-
- pfont = pGC->font;
- width = FONTMAXBOUNDS(pfont,rightSideBearing) -
- FONTMINBOUNDS(pfont,leftSideBearing);
- height = FONTMAXBOUNDS(pfont,ascent) +
- FONTMAXBOUNDS(pfont,descent);
-
- pPixmap = (*pDrawable->pScreen->CreatePixmap)(pDrawable->pScreen,
- width, height, 1);
- if (!pPixmap)
- return;
-
- pGCtmp = GetScratchGC(1, pDrawable->pScreen);
- if (!pGCtmp)
- {
- (*pDrawable->pScreen->DestroyPixmap)(pPixmap);
- return;
- }
-
- gcvals[0] = GXcopy;
- gcvals[1] = 1;
- gcvals[2] = 0;
-
- DoChangeGC(pGCtmp, GCFunction|GCForeground|GCBackground, gcvals, 0);
-
- nbyLine = PixmapBytePad(width, 1);
- pbits = (unsigned char *)ALLOCATE_LOCAL(height*nbyLine);
- if (!pbits)
- {
- (*pDrawable->pScreen->DestroyPixmap)(pPixmap);
- FreeScratchGC(pGCtmp);
- return;
- }
- while(nglyph--)
- {
- pci = *ppci++;
- pglyph = FONTGLYPHBITS(pglyphBase, pci);
- gWidth = GLYPHWIDTHPIXELS(pci);
- gHeight = GLYPHHEIGHTPIXELS(pci);
- if (gWidth && gHeight)
- {
- nbyGlyphWidth = GLYPHWIDTHBYTESPADDED(pci);
- nbyPadGlyph = PixmapBytePad(gWidth, 1);
-
- if (nbyGlyphWidth == nbyPadGlyph
- #if GLYPHPADBYTES != 4
- && (((int) pglyph) & 3) == 0
- #endif
- )
- {
- pb = pglyph;
- }
- else
- {
- for (i=0, pb = pbits; i<gHeight; i++, pb = pbits+(i*nbyPadGlyph))
- for (j = 0; j < nbyGlyphWidth; j++)
- *pb++ = *pglyph++;
- pb = pbits;
- }
-
- if ((pGCtmp->serialNumber) != (pPixmap->drawable.serialNumber))
- ValidateGC((DrawablePtr)pPixmap, pGCtmp);
- (*pGCtmp->ops->PutImage)(pPixmap, pGCtmp, pPixmap->drawable.depth,
- 0, 0, gWidth, gHeight,
- 0, XYBitmap, pb);
-
- if ((pGC->serialNumber) != (pDrawable->serialNumber))
- ValidateGC(pDrawable, pGC);
- (*pGC->ops->PushPixels)(pGC, pPixmap, pDrawable,
- gWidth, gHeight,
- x + pci->metrics.leftSideBearing,
- y - pci->metrics.ascent);
- }
- x += pci->metrics.characterWidth;
- }
- (*pDrawable->pScreen->DestroyPixmap)(pPixmap);
- DEALLOCATE_LOCAL(pbits);
- FreeScratchGC(pGCtmp);
- }
-
-
- void
- miImageGlyphBlt(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 */
- {
- ExtentInfoRec info; /* used by QueryGlyphExtents() */
- XID gcvals[3];
- int oldAlu, oldFS;
- unsigned long oldFG;
- xRectangle backrect;
-
- QueryGlyphExtents(pGC->font, ppci, (unsigned long)nglyph, &info);
-
- if (info.overallWidth >= 0)
- {
- backrect.x = x;
- backrect.width = info.overallWidth;
- }
- else
- {
- backrect.x = x + info.overallWidth;
- backrect.width = -info.overallWidth;
- }
- backrect.y = y - FONTASCENT(pGC->font);
- backrect.height = FONTASCENT(pGC->font) + FONTDESCENT(pGC->font);
-
- oldAlu = pGC->alu;
- oldFG = pGC->fgPixel;
- oldFS = pGC->fillStyle;
-
- /* fill in the background */
- gcvals[0] = GXcopy;
- gcvals[1] = pGC->bgPixel;
- gcvals[2] = FillSolid;
- DoChangeGC(pGC, GCFunction|GCForeground|GCFillStyle, gcvals, 0);
- ValidateGC(pDrawable, pGC);
- (*pGC->ops->PolyFillRect)(pDrawable, pGC, 1, &backrect);
-
- /* put down the glyphs */
- gcvals[0] = oldFG;
- DoChangeGC(pGC, GCForeground, gcvals, 0);
- ValidateGC(pDrawable, pGC);
- (*pGC->ops->PolyGlyphBlt)(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);
-
- /* put all the toys away when done playing */
- gcvals[0] = oldAlu;
- gcvals[1] = oldFG;
- gcvals[2] = oldFS;
- DoChangeGC(pGC, GCFunction|GCForeground|GCFillStyle, gcvals, 0);
-
- }
-