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Diffstat (limited to 'cfb/cfbtegblt.c')
| -rw-r--r-- | cfb/cfbtegblt.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/cfb/cfbtegblt.c b/cfb/cfbtegblt.c new file mode 100644 index 000000000..383926619 --- /dev/null +++ b/cfb/cfbtegblt.c @@ -0,0 +1,201 @@ +/* $Xorg: cfbtegblt.c,v 1.4 2001/02/09 02:04:39 xorgcvs Exp $ */ +/*********************************************************** + +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. + +******************************************************************/ +#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" +#include "mi.h" +#define MFB_CONSTS_ONLY +#include "maskbits.h" + +/* + 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 */ + pointer 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 (RECT_IN_REGION(pGC->pScreen, cfbGetCompositeClip(pGC), &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, (PGSZ - xtemp)); + + ptemp = (unsigned long *)(pglyph + (xtemp >> MFB_PWSH)); + 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; + } +} |