442 lines
12 KiB
C
442 lines
12 KiB
C
/* $Xorg: cfbglblt8.c,v 1.4 2001/02/09 02:04:38 xorgcvs Exp $ */
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/*
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Copyright 1989, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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*/
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/*
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* Poly glyph blt. Accepts an arbitrary font <= 32 bits wide, in Copy mode
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* only.
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*/
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#include "X.h"
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#include "Xmd.h"
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#include "Xproto.h"
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#include "cfb.h"
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#include "fontstruct.h"
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#include "dixfontstr.h"
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#include "gcstruct.h"
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#include "windowstr.h"
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#include "scrnintstr.h"
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#include "pixmapstr.h"
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#include "regionstr.h"
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#include "cfbmskbits.h"
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#include "cfb8bit.h"
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#define BOX_OVERLAP(box1, box2, xoffset, yoffset) \
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((box1)->x1 <= ((int) (box2)->x2 + (xoffset)) && \
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((int) (box2)->x1 + (xoffset)) <= (box1)->x2 && \
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(box1)->y1 <= ((int) (box2)->y2 + (yoffset)) && \
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((int) (box2)->y1 + (yoffset)) <= (box1)->y2)
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#define BOX_CONTAINS(box1, box2, xoffset, yoffset) \
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((box1)->x1 <= ((int) (box2)->x1 + (xoffset)) && \
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((int) (box2)->x2 + (xoffset)) <= (box1)->x2 && \
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(box1)->y1 <= ((int) (box2)->y1 + (yoffset)) && \
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((int) (box2)->y2 + (yoffset)) <= (box1)->y2)
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#if defined(FOUR_BIT_CODE) || defined(WriteBitGroup) && !defined(GLYPHROP)
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#if GLYPHPADBYTES != 4
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#define USE_LEFTBITS
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#endif
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#ifdef USE_LEFTBITS
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typedef unsigned char *glyphPointer;
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extern unsigned long endtab[];
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#define GlyphBits(bits,width,dst) getleftbits(bits,width,dst); \
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(dst) &= widthMask; \
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(bits) += widthGlyph;
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#define GlyphBitsS(bits,width,dst,off) GlyphBits(bits,width,dst); \
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dst = BitRight (dst, off);
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#else
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typedef CARD32 *glyphPointer;
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#define GlyphBits(bits,width,dst) dst = *bits++;
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#define GlyphBitsS(bits,width,dst,off) dst = BitRight(*bits++, off);
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#endif
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#ifdef GLYPHROP
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#define cfbPolyGlyphBlt8 cfbPolyGlyphRop8
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#define cfbPolyGlyphBlt8Clipped cfbPolyGlyphRop8Clipped
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#undef WriteBitGroup
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#define WriteBitGroup(dst,pixel,bits) RRopBitGroup(dst,bits)
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#endif
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static void cfbPolyGlyphBlt8Clipped();
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#if defined(HAS_STIPPLE_CODE) && !defined(GLYPHROP) && !defined(USE_LEFTBITS)
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#define USE_STIPPLE_CODE
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#endif
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#if defined(__GNUC__) && !defined(GLYPHROP) && (defined(mc68020) || defined(mc68000) || defined(__mc68000__)) && !defined(USE_LEFTBITS)
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#ifdef USE_STIPPLE_CODE
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#undef USE_STIPPLE_CODE
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#endif
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#endif
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#define DST_INC (PGSZB >> PWSH)
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/* cfbStippleStack/cfbStippleStackTE are coded in assembly language.
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* They are only provided on some architecures.
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*/
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#ifdef USE_STIPPLE_CODE
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extern void cfbStippleStack (), cfbStippleStackTE ();
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#endif
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void
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cfbPolyGlyphBlt8 (pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
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DrawablePtr pDrawable;
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GCPtr pGC;
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int x, y;
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unsigned int nglyph;
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CharInfoPtr *ppci; /* array of character info */
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pointer pglyphBase; /* start of array of glyphs */
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{
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register unsigned long c;
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#ifndef GLYPHROP
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register unsigned long pixel;
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#endif
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register unsigned long *dst;
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register glyphPointer glyphBits;
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register int xoff;
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FontPtr pfont = pGC->font;
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CharInfoPtr pci;
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unsigned long *dstLine;
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unsigned long *pdstBase;
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int hTmp;
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int bwidthDst;
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int widthDst;
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int h;
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int ew;
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BoxRec bbox; /* for clipping */
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int widthDiff;
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int w;
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RegionPtr clip;
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BoxPtr extents;
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#ifdef USE_LEFTBITS
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int widthGlyph;
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unsigned long widthMask;
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#endif
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#ifndef STIPPLE
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#ifdef USE_STIPPLE_CODE
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void (*stipple)();
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stipple = cfbStippleStack;
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if (FONTCONSTMETRICS(pfont))
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stipple = cfbStippleStackTE;
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#endif
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#endif
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x += pDrawable->x;
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y += pDrawable->y;
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/* compute an approximate (but covering) bounding box */
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bbox.x1 = 0;
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if ((ppci[0]->metrics.leftSideBearing < 0))
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bbox.x1 = ppci[0]->metrics.leftSideBearing;
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h = nglyph - 1;
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w = ppci[h]->metrics.rightSideBearing;
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while (--h >= 0)
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w += ppci[h]->metrics.characterWidth;
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bbox.x2 = w;
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bbox.y1 = -FONTMAXBOUNDS(pfont,ascent);
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bbox.y2 = FONTMAXBOUNDS(pfont,descent);
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clip = cfbGetCompositeClip(pGC);
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extents = &clip->extents;
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if (!clip->data)
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{
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if (!BOX_CONTAINS(extents, &bbox, x, y))
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{
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if (BOX_OVERLAP (extents, &bbox, x, y))
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cfbPolyGlyphBlt8Clipped(pDrawable, pGC, x, y,
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nglyph, ppci, pglyphBase);
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return;
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}
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}
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else
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{
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/* check to make sure some of the text appears on the screen */
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if (!BOX_OVERLAP (extents, &bbox, x, y))
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return;
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bbox.x1 += x;
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bbox.x2 += x;
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bbox.y1 += y;
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bbox.y2 += y;
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switch (RECT_IN_REGION(pGC->pScreen, clip, &bbox))
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{
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case rgnPART:
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cfbPolyGlyphBlt8Clipped(pDrawable, pGC, x, y,
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nglyph, ppci, pglyphBase);
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case rgnOUT:
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return;
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}
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}
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#ifdef GLYPHROP
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cfb8CheckStipple (pGC->alu, pGC->fgPixel, pGC->planemask);
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#else
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pixel = cfbGetGCPrivate(pGC)->xor;
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#endif
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cfbGetTypedWidthAndPointer (pDrawable, bwidthDst, pdstBase, char, unsigned long)
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widthDst = bwidthDst / PGSZB;
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while (nglyph--)
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{
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pci = *ppci++;
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glyphBits = (glyphPointer) FONTGLYPHBITS(pglyphBase,pci);
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xoff = x + pci->metrics.leftSideBearing;
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dstLine = pdstBase +
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(y - pci->metrics.ascent) * widthDst + (xoff >> PWSH);
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x += pci->metrics.characterWidth;
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if (hTmp = pci->metrics.descent + pci->metrics.ascent)
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{
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xoff &= PIM;
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#ifdef STIPPLE
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STIPPLE(dstLine,glyphBits,pixel,bwidthDst,hTmp,xoff);
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#else
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#ifdef USE_STIPPLE_CODE
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(*stipple)(dstLine,glyphBits,pixel,bwidthDst,hTmp,xoff);
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#else
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#ifdef USE_LEFTBITS
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w = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing;
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widthGlyph = PADGLYPHWIDTHBYTES(w);
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widthMask = endtab[w];
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#endif
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do {
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dst = dstLine;
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dstLine = (unsigned long *) (((char *) dstLine) + bwidthDst);
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GlyphBits(glyphBits, w, c)
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WriteBitGroup(dst, pixel, GetBitGroup(BitRight(c,xoff)));
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dst += DST_INC;
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c = BitLeft(c,PGSZB - xoff);
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while (c)
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{
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WriteBitGroup(dst, pixel, GetBitGroup(c));
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NextBitGroup(c);
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dst += DST_INC;
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}
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} while (--hTmp);
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#endif /* USE_STIPPLE_CODE else */
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#endif /* STIPPLE else */
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}
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}
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}
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static void
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cfbPolyGlyphBlt8Clipped (pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
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DrawablePtr pDrawable;
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GCPtr pGC;
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int x, y;
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unsigned int nglyph;
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CharInfoPtr *ppci; /* array of character info */
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unsigned char *pglyphBase; /* start of array of glyphs */
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{
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register unsigned long c;
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#ifndef GLYPHROP
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register unsigned long pixel;
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#endif
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register unsigned long *dst;
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register glyphPointer glyphBits;
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register int xoff;
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unsigned long c1;
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CharInfoPtr pci;
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FontPtr pfont = pGC->font;
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unsigned long *dstLine;
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unsigned long *pdstBase;
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CARD32 *cTmp, *clips;
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int maxAscent, maxDescent;
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int minLeftBearing;
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int hTmp;
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int widthDst;
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int bwidthDst;
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int ew;
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int xG, yG;
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BoxPtr pBox;
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int numRects;
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int widthDiff;
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int w;
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RegionPtr pRegion;
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int yBand;
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#ifdef GLYPHROP
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unsigned long bits;
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#endif
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#ifdef USE_LEFTBITS
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int widthGlyph;
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unsigned long widthMask;
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#endif
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#ifdef GLYPHROP
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cfb8CheckStipple (pGC->alu, pGC->fgPixel, pGC->planemask);
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#else
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pixel = cfbGetGCPrivate(pGC)->xor;
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#endif
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cfbGetTypedWidthAndPointer (pDrawable, bwidthDst, pdstBase, char, unsigned long)
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widthDst = bwidthDst / PGSZB;
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maxAscent = FONTMAXBOUNDS(pfont,ascent);
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maxDescent = FONTMAXBOUNDS(pfont,descent);
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minLeftBearing = FONTMINBOUNDS(pfont,leftSideBearing);
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pRegion = cfbGetCompositeClip(pGC);
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pBox = REGION_RECTS(pRegion);
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numRects = REGION_NUM_RECTS (pRegion);
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while (numRects && pBox->y2 <= y - maxAscent)
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{
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++pBox;
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--numRects;
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}
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if (!numRects || pBox->y1 >= y + maxDescent)
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return;
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yBand = pBox->y1;
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while (numRects && pBox->y1 == yBand && pBox->x2 <= x + minLeftBearing)
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{
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++pBox;
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--numRects;
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}
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if (!numRects)
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return;
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clips = (CARD32 *)ALLOCATE_LOCAL ((maxAscent + maxDescent) *
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sizeof (CARD32));
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while (nglyph--)
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{
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pci = *ppci++;
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glyphBits = (glyphPointer) FONTGLYPHBITS(pglyphBase,pci);
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w = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing;
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xG = x + pci->metrics.leftSideBearing;
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yG = y - pci->metrics.ascent;
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x += pci->metrics.characterWidth;
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if (hTmp = pci->metrics.descent + pci->metrics.ascent)
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{
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dstLine = pdstBase + yG * widthDst + (xG >> PWSH);
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xoff = xG & PIM;
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#ifdef USE_LEFTBITS
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w = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing;
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widthGlyph = PADGLYPHWIDTHBYTES(w);
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widthMask = endtab[w];
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#endif
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switch (cfb8ComputeClipMasks32 (pBox, numRects, xG, yG, w, hTmp, clips))
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{
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case rgnPART:
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#ifdef USE_LEFTBITS
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cTmp = clips;
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do {
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dst = dstLine;
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dstLine = (unsigned long *) (((char *) dstLine) + bwidthDst);
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GlyphBits(glyphBits, w, c)
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c &= *cTmp++;
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if (c)
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{
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WriteBitGroup(dst, pixel, GetBitGroup(BitRight(c,xoff)));
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c = BitLeft(c,PGSZB - xoff);
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dst += DST_INC;
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while (c)
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{
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WriteBitGroup(dst, pixel, GetBitGroup(c));
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NextBitGroup(c);
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dst += DST_INC;
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}
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}
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} while (--hTmp);
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break;
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#else /* !USE_LEFT_BITS */
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{
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int h;
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h = hTmp;
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do
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{
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--h;
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clips[h] = clips[h] & glyphBits[h];
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} while (h);
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}
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glyphBits = clips;
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/* fall through */
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#endif /* USE_LEFT_BITS */
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case rgnIN:
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#ifdef STIPPLE
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STIPPLE(dstLine,glyphBits,pixel,bwidthDst,hTmp,xoff);
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#else
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#ifdef USE_STIPPLE_CODE
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cfbStippleStackTE(dstLine,glyphBits,pixel,bwidthDst,hTmp,xoff);
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#else
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do {
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dst = dstLine;
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dstLine = (unsigned long *) (((char *) dstLine) + bwidthDst);
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GlyphBits(glyphBits, w, c)
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if (c)
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{
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/* This code originally could read memory locations
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* that were not mapped. Hence we have to check the
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* trailing bits to see whether they are zero and if
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* then skip them correctly. This is no problem for
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* the GXcopy case, since there only the pixels that
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* are non-zero are written ...
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*/
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#ifndef GLYPHROP
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WriteBitGroup(dst, pixel, GetBitGroup(BitRight(c,xoff)));
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c = BitLeft(c,PGSZB - xoff);
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dst += DST_INC;
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#else /* GLYPHROP */
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if (bits = GetBitGroup(BitRight(c,xoff)))
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WriteBitGroup(dst, pixel, bits);
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c = BitLeft(c,PGSZB - xoff);
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dst += DST_INC;
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while (c && ((bits = GetBitGroup(c)) == 0))
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{
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NextBitGroup(c);
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dst += DST_INC;
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}
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#endif /* GLYPHROP */
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while (c)
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{
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WriteBitGroup(dst, pixel, GetBitGroup(c));
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NextBitGroup(c);
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dst += DST_INC;
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}
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}
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} while (--hTmp);
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#endif /* USE_STIPPLE_CODE else */
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#endif /* STIPPLE else */
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break;
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}
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}
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}
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DEALLOCATE_LOCAL (clips);
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}
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#endif /* FOUR_BIT_CODE */
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