505 lines
15 KiB
C
505 lines
15 KiB
C
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/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
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/***********************************************************
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Copyright (c) 1987 X Consortium
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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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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X CONSORTIUM 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 X Consortium 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 X Consortium.
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Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the name of Digital not be
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used in advertising or publicity pertaining to distribution of the
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software without specific, written prior permission.
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DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
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ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
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DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
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ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
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WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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SOFTWARE.
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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 "xf4bpp.h"
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#include "OScompiler.h"
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#include "mfbmap.h"
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#include "mfb.h"
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#include "maskbits.h"
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#include "mi.h"
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#include "dixfontstr.h"
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#include "ppcGCstr.h"
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#include "wm3.h"
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#include "xf86str.h" /* for pScrn->vtSema */
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extern ScrnInfoPtr *xf86Screens;
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/*
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we should eventually special-case fixed-width fonts for ImageText.
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this works for fonts with glyphs <= 32 bits wide.
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the clipping calculations are done for worst-case fonts.
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we make no assumptions about the heights, widths, or bearings
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of the glyphs. if we knew that the glyphs are all the same height,
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we could clip the tops and bottoms per clipping box, rather
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than per character per clipping box. if we knew that the glyphs'
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left and right bearings were wlle-behaved, we could clip a single
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character at the start, output until the last unclipped
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character, and then clip the last one. this is all straightforward
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to determine based on max-bounds and min-bounds from the font.
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there is some inefficiency introduced in the per-character
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clipping to make what's going on clearer.
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(it is possible, for example, for a font to be defined in which the
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next-to-last character in a font would be clipped out, but the last
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one wouldn't. the code below deals with this.)
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Image text looks at the bits in the glyph and the fg and bg in the
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GC. it paints a rectangle, as defined in the protocol dcoument,
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and the paints the characters.
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to avoid source proliferation, this file is compiled
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three times:
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MFBIMAGEGLYPHBLT OPEQ
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mfbImageGlyphBltWhite |=
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mfbImageGlyphBltBlack &=~
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the register allocations for startmask and endmask may not
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be the right thing. are there two other deserving candidates?
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xoff, pdst, pglyph, and tmpSrc seem like the right things, though.
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*/
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/* Forward declarations -- GJA */
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static void doImageGlyphBlt(
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DrawablePtr,
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GC *,
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int,
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int,
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unsigned int,
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CharInfoPtr *,
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unsigned char *,
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ExtentInfoRec *
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);
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void
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xf4bppImageGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
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DrawablePtr pDrawable;
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GC *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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ExtentInfoRec info; /* used by QueryGlyphExtents() */
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xRectangle backrect;/* backing rectangle to paint.
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in the general case, NOT necessarily
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the same as the string's bounding box
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*/
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/* GJA -- I agree, this ALL should be moved to GC validation. */
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if ( (pDrawable->type != DRAWABLE_WINDOW) || (pGC->alu != GXcopy) ||
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!xf86Screens[pDrawable->pScreen->myNum]->vtSema ||
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((pGC->font) &&
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(FONTMAXBOUNDS(pGC->font,rightSideBearing) -
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FONTMINBOUNDS(pGC->font,leftSideBearing) > 32 ||
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FONTMINBOUNDS(pGC->font,characterWidth) < 0)) ) {
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miImageGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);
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} else {
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ppcPrivGC *pPrivGC;
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int oldfillStyle, oldfg, oldalu;
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if (!(pGC->planemask & 0x0F))
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return;
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QueryGlyphExtents(pGC->font, ppci, (unsigned long)nglyph, &info);
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backrect.x = x;
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backrect.y = y - FONTASCENT(pGC->font);
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backrect.width = info.overallWidth;
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backrect.height = FONTASCENT(pGC->font) + FONTDESCENT(pGC->font);
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pPrivGC = pGC->devPrivates[mfbGetGCPrivateIndex()].ptr;
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oldfillStyle = pPrivGC->colorRrop.fillStyle; /* GJA */
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oldfg = pPrivGC->colorRrop.fgPixel; /* GJA */
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oldalu = pPrivGC->colorRrop.alu; /* GJA */
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pPrivGC->colorRrop.fillStyle = FillSolid; /* GJA */
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pPrivGC->colorRrop.fgPixel = pGC->bgPixel; /* GJA */
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pGC->fgPixel = pGC->bgPixel;
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pPrivGC->colorRrop.alu = GXcopy; /* GJA */
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pGC->alu = GXcopy;
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/* Required fields:
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* colorRrop.alu, colorRrop.planemask, colorRrop.fgPixel
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*/
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xf4bppPolyFillRect(pDrawable, pGC, 1, &backrect);
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pPrivGC->colorRrop.fgPixel = oldfg; /* GJA */
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pGC->fgPixel = oldfg;
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/* the faint-hearted can open their eyes now */
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DO_WM3(pGC,doImageGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci,
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pglyphBase,&info))
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pPrivGC->colorRrop.fillStyle = oldfillStyle; /* GJA */
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pPrivGC->colorRrop.alu = oldalu; /* GJA */
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pGC->alu = oldalu;
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}
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}
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static void
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doImageGlyphBlt(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase,infop)
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DrawablePtr pDrawable;
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GC *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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ExtentInfoRec* infop; /* used by QueryGlyphExtents() */
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{
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BoxRec bbox; /* string's bounding box */
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CharInfoPtr pci;
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int xorg, yorg; /* origin of drawable in bitmap */
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int widthDst; /* width of dst in longwords */
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/* these keep track of the character origin */
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CARD32 *pdstBase;
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/* points to longword with character origin */
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int xchar; /* xorigin of char (mod 32) */
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/* these are used for placing the glyph */
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register int xoff; /* x offset of left edge of glyph (mod 32) */
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register CARD32 *pdst;
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/* pointer to current longword in dst */
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int w; /* width of glyph in bits */
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int h; /* height of glyph */
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int widthGlyph; /* width of glyph, in bytes */
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register unsigned char *pglyph;
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/* pointer to current row of glyph */
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/* used for putting down glyph */
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register unsigned int tmpSrc;
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/* for getting bits from glyph */
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register int startmask;
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register int endmask;
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register int nFirst;/* bits of glyph in current longword */
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xorg = pDrawable->x;
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yorg = pDrawable->y;
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if (pDrawable->type == DRAWABLE_WINDOW)
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{
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pdstBase = (CARD32 *)
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(((PixmapPtr)(pDrawable->pScreen->devPrivate))->devPrivate.ptr);
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widthDst = (int)
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(((PixmapPtr)(pDrawable->pScreen->devPrivate))->devKind) >> 2;
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}
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else
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{
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pdstBase = (CARD32 *)(((PixmapPtr)pDrawable)->devPrivate.ptr);
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widthDst = (int)(((PixmapPtr)pDrawable)->devKind) >> 2;
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}
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x += xorg;
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y += yorg;
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bbox.x1 = x + infop->overallLeft;
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bbox.x2 = x + infop->overallRight;
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bbox.y1 = y - infop->overallAscent;
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bbox.y2 = y + infop->overallDescent;
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/* UNCLEAN CODE
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we know the mfbPolyFillRect uses only three fields in
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devPrivate[mfbGetGCPrivateIndex()].ptr, two of which (the rotated
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tile/stipple and the ropFillArea) are
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irrelevant for solid filling, so we just poke the FillArea
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field. the GC is now in an inconsistent state, but we'll fix
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it as soon as PolyFillRect returns. fortunately, the server
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is single threaded.
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NOTE:
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if you are not using the standard mfbFillRectangle code, you
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need to poke any fields in the GC the rectangle stuff need
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(probably alu, fgPixel, and fillStyle) and in devPrivate[mfbGetGCPrivateIndex()].ptr
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(probably rop or ropFillArea.) You could just call ValidateGC,
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but that is usually not a cheap thing to do.
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*/
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switch (RECT_IN_REGION(pGC->pScreen, pGC->pCompositeClip, &bbox))
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{
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case rgnOUT:
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break;
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case rgnIN:
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pdstBase = pdstBase + (widthDst * y) + (x >> PWSH);
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xchar = x & PIM;
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while(nglyph--)
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{
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pci = *ppci;
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pglyph = FONTGLYPHBITS(pglyphBase, pci);
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w = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing;
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h = pci->metrics.ascent + pci->metrics.descent;
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widthGlyph = GLYPHWIDTHBYTESPADDED(pci);
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/* start at top scanline of glyph */
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pdst = pdstBase - (pci->metrics.ascent * widthDst);
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/* find correct word in scanline and x offset within it
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for left edge of glyph
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*/
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xoff = xchar + pci->metrics.leftSideBearing;
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if (xoff > PIM)
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{
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pdst++;
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xoff &= PIM;
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}
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else if (xoff < 0)
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{
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xoff += PPW;
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pdst--;
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}
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if ((xoff + w) <= PPW)
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{
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/* glyph all in one longword */
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maskpartialbits(xoff, w, startmask);
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while (h--)
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{
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getleftbits(pglyph, w, tmpSrc);
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UPDRW(pdst,(SCRRIGHT(tmpSrc, xoff) & startmask));
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pglyph += widthGlyph;
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pdst += widthDst;
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}
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}
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else
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{
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/* glyph crosses longword boundary */
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maskPPWbits(xoff, w, startmask, endmask);
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nFirst = PPW - xoff;
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while (h--)
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{
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getleftbits(pglyph, w, tmpSrc);
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UPDRW(pdst,(SCRRIGHT(tmpSrc, xoff) & startmask));
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UPDRW(&(pdst[1]),(SCRLEFT(tmpSrc, nFirst) & endmask));
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pglyph += widthGlyph;
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pdst += widthDst;
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}
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} /* glyph crosses longwords boundary */
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/* update character origin */
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x += pci->metrics.characterWidth;
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xchar += pci->metrics.characterWidth;
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if (xchar > PLST)
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{
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xchar -= PPW;
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pdstBase++;
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}
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else if (xchar < 0)
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{
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xchar += PPW;
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pdstBase--;
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}
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ppci++;
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} /* while nglyph-- */
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break;
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case rgnPART:
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{
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TEXTPOS *ppos;
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int nbox;
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BoxPtr pbox;
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RegionPtr cclip;
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int xpos; /* x position of char origin */
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unsigned int i;
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BoxRec clip;
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int leftEdge, rightEdge;
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int topEdge, bottomEdge;
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int glyphRow; /* first row of glyph not wholly
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clipped out */
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int glyphCol; /* leftmost visible column of glyph */
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#if GETLEFTBITS_ALIGNMENT > 1
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int getWidth; /* bits to get from glyph */
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#endif
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if(!(ppos = (TEXTPOS *)ALLOCATE_LOCAL(nglyph * sizeof(TEXTPOS))))
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return;
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pdstBase = pdstBase + (widthDst * y) + (x >> PWSH);
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xpos = x;
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xchar = xpos & PIM;
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|
|
||
|
|
for (i=0; i<nglyph; i++)
|
||
|
|
{
|
||
|
|
pci = ppci[i];
|
||
|
|
|
||
|
|
ppos[i].xpos = xpos;
|
||
|
|
ppos[i].xchar = xchar;
|
||
|
|
ppos[i].leftEdge = xpos + pci->metrics.leftSideBearing;
|
||
|
|
ppos[i].rightEdge = xpos + pci->metrics.rightSideBearing;
|
||
|
|
ppos[i].topEdge = y - pci->metrics.ascent;
|
||
|
|
ppos[i].bottomEdge = y + pci->metrics.descent;
|
||
|
|
ppos[i].pdstBase = pdstBase;
|
||
|
|
ppos[i].widthGlyph = GLYPHWIDTHBYTESPADDED(pci);
|
||
|
|
|
||
|
|
xpos += pci->metrics.characterWidth;
|
||
|
|
xchar += pci->metrics.characterWidth;
|
||
|
|
if (xchar > PLST)
|
||
|
|
{
|
||
|
|
xchar &= PIM;
|
||
|
|
pdstBase++;
|
||
|
|
}
|
||
|
|
else if (xchar < 0)
|
||
|
|
{
|
||
|
|
xchar += PPW;
|
||
|
|
pdstBase--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
cclip = pGC->pCompositeClip;
|
||
|
|
pbox = REGION_RECTS(cclip);
|
||
|
|
nbox = REGION_NUM_RECTS(cclip);
|
||
|
|
|
||
|
|
/* HACK ALERT
|
||
|
|
since we continue out of the loop below so often, it
|
||
|
|
is easier to increment pbox at the top than at the end.
|
||
|
|
don't try this at home.
|
||
|
|
*/
|
||
|
|
pbox--;
|
||
|
|
while(nbox--)
|
||
|
|
{
|
||
|
|
pbox++;
|
||
|
|
clip.x1 = max(bbox.x1, pbox->x1);
|
||
|
|
clip.y1 = max(bbox.y1, pbox->y1);
|
||
|
|
clip.x2 = min(bbox.x2, pbox->x2);
|
||
|
|
clip.y2 = min(bbox.y2, pbox->y2);
|
||
|
|
if ((clip.x2<=clip.x1) || (clip.y2<=clip.y1))
|
||
|
|
continue;
|
||
|
|
|
||
|
|
for(i=0; i<nglyph; i++)
|
||
|
|
{
|
||
|
|
pci = ppci[i];
|
||
|
|
xchar = ppos[i].xchar;
|
||
|
|
|
||
|
|
/* clip the left and right edges */
|
||
|
|
if (ppos[i].leftEdge < clip.x1)
|
||
|
|
leftEdge = clip.x1;
|
||
|
|
else
|
||
|
|
leftEdge = ppos[i].leftEdge;
|
||
|
|
|
||
|
|
if (ppos[i].rightEdge > clip.x2)
|
||
|
|
rightEdge = clip.x2;
|
||
|
|
else
|
||
|
|
rightEdge = ppos[i].rightEdge;
|
||
|
|
|
||
|
|
w = rightEdge - leftEdge;
|
||
|
|
if (w <= 0)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
/* clip the top and bottom edges */
|
||
|
|
if (ppos[i].topEdge < clip.y1)
|
||
|
|
topEdge = clip.y1;
|
||
|
|
else
|
||
|
|
topEdge = ppos[i].topEdge;
|
||
|
|
|
||
|
|
if (ppos[i].bottomEdge > clip.y2)
|
||
|
|
bottomEdge = clip.y2;
|
||
|
|
else
|
||
|
|
bottomEdge = ppos[i].bottomEdge;
|
||
|
|
|
||
|
|
h = bottomEdge - topEdge;
|
||
|
|
if (h <= 0)
|
||
|
|
continue;
|
||
|
|
|
||
|
|
glyphRow = (topEdge - y) + pci->metrics.ascent;
|
||
|
|
widthGlyph = ppos[i].widthGlyph;
|
||
|
|
pglyph = FONTGLYPHBITS(pglyphBase, pci);
|
||
|
|
pglyph += (glyphRow * widthGlyph);
|
||
|
|
|
||
|
|
pdst = ppos[i].pdstBase - ((y-topEdge) * widthDst);
|
||
|
|
|
||
|
|
glyphCol = (leftEdge - ppos[i].xpos) -
|
||
|
|
(pci->metrics.leftSideBearing);
|
||
|
|
#if GETLEFTBITS_ALIGNMENT > 1
|
||
|
|
getWidth = w + glyphCol;
|
||
|
|
#endif
|
||
|
|
xoff = xchar + (leftEdge - ppos[i].xpos);
|
||
|
|
if (xoff > PLST)
|
||
|
|
{
|
||
|
|
xoff &= PIM;
|
||
|
|
pdst++;
|
||
|
|
}
|
||
|
|
else if (xoff < 0)
|
||
|
|
{
|
||
|
|
xoff += PPW;
|
||
|
|
pdst--;
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((xoff + w) <= PPW)
|
||
|
|
{
|
||
|
|
maskpartialbits(xoff, w, startmask);
|
||
|
|
while (h--)
|
||
|
|
{
|
||
|
|
getshiftedleftbits(pglyph, glyphCol, getWidth, tmpSrc);
|
||
|
|
UPDRW(pdst,(SCRRIGHT(tmpSrc, xoff) & startmask));
|
||
|
|
pglyph += widthGlyph;
|
||
|
|
pdst += widthDst;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
{
|
||
|
|
maskPPWbits(xoff, w, startmask, endmask);
|
||
|
|
nFirst = PPW - xoff;
|
||
|
|
while (h--)
|
||
|
|
{
|
||
|
|
getshiftedleftbits(pglyph, glyphCol, getWidth, tmpSrc);
|
||
|
|
UPDRW(pdst,(SCRRIGHT(tmpSrc, xoff) & startmask));
|
||
|
|
UPDRW(&(pdst[1]),(SCRLEFT(tmpSrc, nFirst) & endmask));
|
||
|
|
pglyph += widthGlyph;
|
||
|
|
pdst += widthDst;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} /* for each glyph */
|
||
|
|
} /* while nbox-- */
|
||
|
|
DEALLOCATE_LOCAL(ppos);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
default:
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|