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IABSD.fr/xenocara/xserver/mfb/mfbtegblt.c
matthieu
- xserver/mfb/mfbtegblt.c
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/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */ /*********************************************************** 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 <X11/X.h> #include <X11/Xmd.h> #include <X11/Xproto.h> #include "mfb.h" #include <X11/fonts/fontstruct.h> #include "dixfontstr.h" #include "gcstruct.h" #include "windowstr.h" #include "scrnintstr.h" #include "pixmapstr.h" #include "regionstr.h" #include "maskbits.h" /* this works for fonts with glyphs <= PPW bits wide. 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. to avoid source proliferation, this file is compiled two times: MFBTEGLYPHBLT OP mfbTEGlyphBltWhite (white text, black bg ) mfbTEGlyphBltBlack ~ (black text, white bg ) */ #if defined(NO_3_60_CG4) && defined(FASTPUTBITS) && defined(FASTGETBITS) #define FASTCHARS #endif /* * this macro "knows" that only characters <= 8 bits wide will * fit this case (which is why it is independent of GLYPHPADBYTES) */ #if (BITMAP_BIT_ORDER == MSBFirst) && (GLYPHPADBYTES != 4) #if GLYPHPADBYTES == 1 #define ShiftAmnt 24 #else #define ShiftAmnt 16 #endif /* * XXX XXX XXX There is something horribly, massively wrong here. There are * hardcoded shifts by 64 below; these cannot work on any present-day * architecture. */ /* * Note: for BITMAP_BIT_ORDER != IMAGE_BYTE_ORDER, SCRRIGHT() evaluates its * first argument more than once. Thus the imbedded char++ have to be moved. * (DHD) */ #if BITMAP_BIT_ORDER == IMAGE_BYTE_ORDER #define GetBits4 c = (*char1++ << ShiftAmnt) | \ SCRRIGHT (*char2++ << ShiftAmnt, xoff2) | \ SCRRIGHT (*char3++ << ShiftAmnt, xoff3) | \ SCRRIGHT (*char4++ << ShiftAmnt, xoff4); #else /* BITMAP_BIT_ORDER != IMAGE_BYTE_ORDER */ #define GetBits4 c = (*char1++ << ShiftAmnt) | \ SCRRIGHT (*char2 << ShiftAmnt, xoff2) | \ SCRRIGHT (*char3 << ShiftAmnt, xoff3) | \ SCRRIGHT (*char4 << ShiftAmnt, xoff4); \ char2++; char3++; char4++; #endif /* BITMAP_BIT_ORDER == IMAGE_BYTE_ORDER */ #else /* (BITMAP_BIT_ORDER != MSBFirst) || (GLYPHPADBYTES == 4) */ #if BITMAP_BIT_ORDER == IMAGE_BYTE_ORDER #define GetBits4 c = *char1++ | \ SCRRIGHT (*char2++, xoff2) | \ SCRRIGHT (*char3++, xoff3) | \ SCRRIGHT (*char4++, xoff4); #else /* BITMAP_BIT_ORDER != IMAGE_BYTE_ORDER */ #define GetBits4 c = *char1++ | \ SCRRIGHT (*char2, xoff2) | \ SCRRIGHT (*char3, xoff3) | \ SCRRIGHT (*char4, xoff4); \ char2++; char3++; char4++; #endif /* BITMAP_BIT_ORDER == IMAGE_BYTE_ORDER */ #endif /* BITMAP_BIT_ORDER && GLYPHPADBYTES */ #if GLYPHPADBYTES == 1 typedef unsigned char *glyphPointer; #define USE_LEFTBITS #endif #if GLYPHPADBYTES == 2 typedef unsigned short *glyphPointer; #define USE_LEFTBITS #endif #if GLYPHPADBYTES == 4 typedef unsigned int *glyphPointer; #endif #ifdef USE_LEFTBITS #define GetBits1 getleftbits (char1, widthGlyph, c); \ c &= glyphMask; \ char1 = (glyphPointer) (((char *) char1) + glyphBytes); #else #define GetBits1 c = *char1++; #endif void MFBTEGLYPHBLT(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase) DrawablePtr pDrawable; GC *pGC; int x, y; unsigned int nglyph; CharInfoPtr *ppci; /* array of character info */ pointer pglyphBase; /* start of array of glyphs */ { FontPtr pfont = pGC->font; int widthDst; PixelType *pdstBase; /* pointer to longword with top row of current glyph */ int h; /* height of glyph and char */ register int xpos; /* current x */ int ypos; /* current y */ int widthGlyph; int hTmp; /* counter for height */ register PixelType startmask, endmask; int nfirst; /* used if glyphs spans a longword boundary */ BoxRec bbox; /* for clipping */ int widthGlyphs; register PixelType *dst; register PixelType c; register int xoff1, xoff2, xoff3, xoff4; register glyphPointer char1, char2, char3, char4; #ifdef USE_LEFTBITS register PixelType glyphMask; register PixelType tmpSrc; register int glyphBytes; #endif if (!(pGC->planemask & 1)) return; mfbGetPixelWidthAndPointer(pDrawable, widthDst, pdstBase); xpos = x + pDrawable->x; ypos = y + pDrawable->y; widthGlyph = FONTMAXBOUNDS(pfont,characterWidth); h = FONTASCENT(pfont) + FONTDESCENT(pfont); xpos += FONTMAXBOUNDS(pfont,leftSideBearing); ypos -= FONTASCENT(pfont); bbox.x1 = xpos; bbox.x2 = xpos + (widthGlyph * nglyph); bbox.y1 = ypos; bbox.y2 = ypos + h; switch (RECT_IN_REGION(pGC->pScreen, pGC->pCompositeClip, &bbox)) { 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... */ CLIPTETEXT(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase); case rgnOUT: return; } pdstBase = mfbScanlineDeltaNoBankSwitch(pdstBase, ypos, widthDst); widthGlyphs = widthGlyph * PGSZB; #ifdef USE_LEFTBITS glyphMask = endtab[widthGlyph]; glyphBytes = GLYPHWIDTHBYTESPADDED(*ppci); #endif if (nglyph >= PGSZB && widthGlyphs <= PPW) { while (nglyph >= PGSZB) { nglyph -= PGSZB; xoff1 = xpos & PIM; xoff2 = widthGlyph; xoff3 = xoff2 + widthGlyph; xoff4 = xoff3 + widthGlyph; char1 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++)); char2 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++)); char3 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++)); char4 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++)); hTmp = h; dst = mfbScanlineOffset(pdstBase, (xpos >> PWSH)); /* switch now */ #ifndef FASTCHARS if (xoff1 + widthGlyphs <= PPW) { maskpartialbits (xoff1, widthGlyphs, startmask); #endif while (hTmp--) { GetBits4 #ifdef FASTCHARS # if BITMAP_BIT_ORDER == MSBFirst c >>= PPW - widthGlyphs; # endif FASTPUTBITS(OP(c), xoff1, widthGlyphs, dst); #else *(dst) = ((*dst) & ~startmask) | (OP(SCRRIGHT(c, xoff1)) & startmask); #endif mfbScanlineInc(dst, widthDst); } #ifndef FASTCHARS } else { maskPPWbits (xoff1, widthGlyphs, startmask, endmask); nfirst = PPW - xoff1; while (hTmp--) { GetBits4 dst[0] = (dst[0] & ~startmask) | (OP(SCRRIGHT(c,xoff1)) & startmask); dst[1] = (dst[1] & ~endmask) | (OP(SCRLEFT(c,nfirst)) & endmask); mfbScanlineInc(dst, widthDst); } } #endif xpos += widthGlyphs; } } while(nglyph--) { xoff1 = xpos & PIM; char1 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++)); hTmp = h; dst = mfbScanlineOffset(pdstBase, (xpos >> PWSH)); #ifndef FASTCHARS if (xoff1 + widthGlyph <= PPW) { maskpartialbits (xoff1, widthGlyph, startmask); #endif while (hTmp--) { #ifdef FASTCHARS #ifdef USE_LEFTBITS FASTGETBITS (char1,0,widthGlyph,c); char1 = (glyphPointer) (((char *) char1) + glyphBytes); #else c = *char1++; #if BITMAP_BIT_ORDER == MSBFirst c >>= PPW - widthGlyph; #endif #endif FASTPUTBITS (OP(c),xoff1,widthGlyph,dst); #else GetBits1 (*dst) = ((*dst) & ~startmask) | (OP(SCRRIGHT(c, xoff1)) & startmask); #endif mfbScanlineInc(dst, widthDst); } #ifndef FASTCHARS } else { maskPPWbits (xoff1, widthGlyph, startmask, endmask); nfirst = PPW - xoff1; while (hTmp--) { GetBits1 dst[0] = (dst[0] & ~startmask) | (OP(SCRRIGHT(c,xoff1)) & startmask); dst[1] = (dst[1] & ~endmask) | (OP(SCRLEFT(c,nfirst)) & endmask); mfbScanlineInc(dst, widthDst); } } #endif xpos += widthGlyph; } }