315 lines
8.5 KiB
C
315 lines
8.5 KiB
C
/* $XFree86: xc/programs/Xserver/hw/xfree86/xaa/xaaTEText.c,v 1.6 1998/12/20 11:57:52 dawes Exp $ */
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/********************************************************************
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In this file we have GC level replacements for PolyText8/16,
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ImageText8/16, ImageGlyphBlt and PolyGlyphBlt for TE (fixed) fonts.
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The idea is that everything in this file is device independent.
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The mentioned GCOps are merely wrappers for XAAGlyphBltTEColorExpansion
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which calculates the boxes containing arbitrarily clipped text
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and passes them to the TEGlyphRenderer which will usually be a lower
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level XAA function which renders these clipped glyphs using
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the basic color expansion functions exported by the chipset driver.
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The TEGlyphRenderer itself may optionally be driver supplied to
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facilitate work-arounds/optimizations at a higher level than usual.
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v1.0 - Mark Vojkovich (mvojkovi@ucsd.edu)
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********************************************************************/
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#ifdef HAVE_XORG_CONFIG_H
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#include <xorg-config.h>
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#endif
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#include "misc.h"
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#include "xf86.h"
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#include "xf86_ansic.h"
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#include "xf86_OSproc.h"
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#include <X11/X.h>
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#include <X11/fonts/font.h>
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#include "scrnintstr.h"
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#include "dixfontstr.h"
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#include "xf86str.h"
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#include "xaa.h"
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#include "xaalocal.h"
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#include "gcstruct.h"
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#include "pixmapstr.h"
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static void XAAGlyphBltTEColorExpansion(ScrnInfoPtr pScrn, int xInit,
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int yInit, FontPtr font, int fg, int bg, int rop,
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unsigned int planemask, RegionPtr cclip, int nglyph,
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unsigned char* gBase, CharInfoPtr *ppci);
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/********************************************************************
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GC level replacements for PolyText8/16 and ImageText8/16
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for TE fonts when using color expansion.
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********************************************************************/
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int
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XAAPolyText8TEColorExpansion(
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DrawablePtr pDraw,
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GCPtr pGC,
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int x, int y,
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int count,
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char *chars )
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{
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
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unsigned long n;
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(*pGC->font->get_glyphs)(pGC->font, (unsigned long)count,
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(unsigned char *)chars, Linear8Bit, &n, infoRec->CharInfo);
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/* we have divorced XAAGlyphBltTEColorExpansion from the drawable */
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if(n) XAAGlyphBltTEColorExpansion(
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infoRec->pScrn, x + pDraw->x, y + pDraw->y,
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pGC->font, pGC->fgPixel, -1, pGC->alu, pGC->planemask,
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pGC->pCompositeClip, n, FONTGLYPHS(pGC->font), infoRec->CharInfo);
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return (x + (n * FONTMAXBOUNDS(pGC->font, characterWidth)));
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}
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int
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XAAPolyText16TEColorExpansion(
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DrawablePtr pDraw,
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GCPtr pGC,
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int x, int y,
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int count,
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unsigned short *chars )
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{
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
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unsigned long n;
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(*pGC->font->get_glyphs)(
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pGC->font, (unsigned long)count, (unsigned char *)chars,
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(FONTLASTROW(pGC->font) == 0) ? Linear16Bit : TwoD16Bit,
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&n, infoRec->CharInfo);
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if(n) XAAGlyphBltTEColorExpansion(
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infoRec->pScrn, x + pDraw->x, y + pDraw->y,
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pGC->font, pGC->fgPixel, -1, pGC->alu, pGC->planemask,
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pGC->pCompositeClip, n, FONTGLYPHS(pGC->font), infoRec->CharInfo);
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return (x + (n * FONTMAXBOUNDS(pGC->font, characterWidth)));
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}
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void
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XAAImageText8TEColorExpansion(
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DrawablePtr pDraw,
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GCPtr pGC,
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int x, int y,
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int count,
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char *chars )
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{
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
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unsigned long n;
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if(!REGION_NUM_RECTS(pGC->pCompositeClip))
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return;
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(*pGC->font->get_glyphs)(pGC->font, (unsigned long)count,
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(unsigned char *)chars, Linear8Bit, &n, infoRec->CharInfo);
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if(n) XAAGlyphBltTEColorExpansion(
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infoRec->pScrn, x + pDraw->x, y + pDraw->y,
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pGC->font, pGC->fgPixel, pGC->bgPixel, GXcopy, pGC->planemask,
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pGC->pCompositeClip, n, FONTGLYPHS(pGC->font), infoRec->CharInfo);
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}
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void
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XAAImageText16TEColorExpansion(
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DrawablePtr pDraw,
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GCPtr pGC,
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int x, int y,
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int count,
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unsigned short *chars )
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{
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
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unsigned long n;
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if(!REGION_NUM_RECTS(pGC->pCompositeClip))
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return;
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(*pGC->font->get_glyphs)(
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pGC->font, (unsigned long)count, (unsigned char *)chars,
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(FONTLASTROW(pGC->font) == 0) ? Linear16Bit : TwoD16Bit,
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&n, infoRec->CharInfo);
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if(n) XAAGlyphBltTEColorExpansion(
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infoRec->pScrn, x + pDraw->x, y + pDraw->y,
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pGC->font, pGC->fgPixel, pGC->bgPixel, GXcopy, pGC->planemask,
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pGC->pCompositeClip, n, FONTGLYPHS(pGC->font), infoRec->CharInfo);
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}
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/********************************************************************
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GC level replacements for ImageGlyphBlt and PolyGlyphBlt for
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TE fonts when using color expansion.
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********************************************************************/
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void
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XAAImageGlyphBltTEColorExpansion(
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DrawablePtr pDrawable,
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GCPtr pGC,
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int xInit, int yInit,
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unsigned int nglyph,
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CharInfoPtr *ppci,
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pointer pglyphBase )
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{
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
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if(!REGION_NUM_RECTS(pGC->pCompositeClip))
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return;
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XAAGlyphBltTEColorExpansion(
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infoRec->pScrn, xInit + pDrawable->x, yInit + pDrawable->y,
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pGC->font, pGC->fgPixel, pGC->bgPixel, GXcopy, pGC->planemask,
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pGC->pCompositeClip, nglyph, (unsigned char*)pglyphBase, ppci);
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}
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void
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XAAPolyGlyphBltTEColorExpansion(
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DrawablePtr pDrawable,
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GCPtr pGC,
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int xInit, int yInit,
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unsigned int nglyph,
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CharInfoPtr *ppci,
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pointer pglyphBase )
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{
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_GC(pGC);
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if(!REGION_NUM_RECTS(pGC->pCompositeClip))
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return;
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XAAGlyphBltTEColorExpansion(
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infoRec->pScrn, xInit + pDrawable->x, yInit + pDrawable->y,
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pGC->font, pGC->fgPixel, -1, pGC->alu, pGC->planemask,
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pGC->pCompositeClip, nglyph, (unsigned char*)pglyphBase, ppci);
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}
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/********************************************************************
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XAAGlyphBltTEColorExpansion -
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This guy computes the clipped pieces of text and sends it to
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the lower-level function which will handle acceleration of
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arbitrarily clipped text.
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********************************************************************/
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static void
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XAAGlyphBltTEColorExpansion(
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ScrnInfoPtr pScrn,
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int xInit, int yInit,
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FontPtr font,
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int fg, int bg,
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int rop,
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unsigned int planemask,
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RegionPtr cclip,
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int nglyph,
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unsigned char* gBase,
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CharInfoPtr *ppci )
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{
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XAAInfoRecPtr infoRec = GET_XAAINFORECPTR_FROM_SCRNINFOPTR(pScrn);
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int skippix, skipglyphs;
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int Left, Right, Top, Bottom;
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int LeftEdge, RightEdge, ytop, ybot;
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int nbox = REGION_NUM_RECTS(cclip);
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BoxPtr pbox = REGION_RECTS(cclip);
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unsigned int **glyphs = NULL;
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int glyphWidth = FONTMAXBOUNDS(font, characterWidth);
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/* find the size of the box */
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Left = xInit;
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Right = Left + (glyphWidth * nglyph);
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Top = yInit - FONTASCENT(font);
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Bottom = yInit + FONTDESCENT(font);
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/* get into the first band that may contain part of our string */
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while(nbox && (Top >= pbox->y2)) {
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pbox++; nbox--;
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}
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/* stop when the lower edge of the box is beyond our string */
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while(nbox && (Bottom > pbox->y1)) {
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LeftEdge = max(Left, pbox->x1);
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RightEdge = min(Right, pbox->x2);
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if(RightEdge > LeftEdge) { /* we have something to draw */
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unsigned int *fallbackBits = NULL;
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ytop = max(Top, pbox->y1);
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ybot = min(Bottom, pbox->y2);
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if((skippix = LeftEdge - Left)) {
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skipglyphs = skippix/glyphWidth;
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skippix %= glyphWidth;
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} else skipglyphs = 0;
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if(!glyphs) {
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int count;
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glyphs = (unsigned int**)(infoRec->PreAllocMem);
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for(count = 0; count < nglyph; count++) {
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glyphs[count] = (unsigned int*)
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FONTGLYPHBITS(gBase,*ppci++);
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if (!glyphs[count]) {
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/* Glyphs with NULL bits do exist in the wild.
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Replace with blank bits in that case */
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if (!fallbackBits) {
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int fontHeight = Bottom - Top + 1;
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fallbackBits = xcalloc (glyphWidth * fontHeight, 1);
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if (!fallbackBits)
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return;
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}
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glyphs[count] = fallbackBits;
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}
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}
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/* our new unrolled TE code only writes DWORDS at a time
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so it can read up to 6 characters past the last one
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we're displaying */
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glyphs[count + 0] = glyphs[0];
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glyphs[count + 1] = glyphs[0];
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glyphs[count + 2] = glyphs[0];
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glyphs[count + 3] = glyphs[0];
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glyphs[count + 4] = glyphs[0];
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glyphs[count + 5] = glyphs[0];
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}
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/* x, y, w, h, skipleft, skiptop, glyphp, glyphWidth, fg, bg, rop, pm */
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(*infoRec->TEGlyphRenderer)( pScrn,
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LeftEdge, ytop, RightEdge - LeftEdge, ybot - ytop,
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skippix, ytop - Top, glyphs + skipglyphs, glyphWidth,
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fg, bg, rop, planemask);
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if (fallbackBits)
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xfree (fallbackBits);
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}
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nbox--; pbox++;
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}
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}
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