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-/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
-/***********************************************************
-
-Copyright (c) 1987 X Consortium
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-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
-X CONSORTIUM 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 X Consortium 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 X Consortium.
-
-
-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 "afb.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"
-
-/*
- we should eventually special-case fixed-width fonts for ImageText.
-
- this works for fonts with glyphs <= 32 bits wide.
-
- the clipping calculations are done for worst-case fonts.
-we make no assumptions about the heights, widths, or bearings
-of the glyphs. if we knew that the glyphs are all the same height,
-we could clip the tops and bottoms per clipping box, rather
-than per character per clipping box. if we knew that the glyphs'
-left and right bearings were wlle-behaved, we could clip a single
-character at the start, output until the last unclipped
-character, and then clip the last one. this is all straightforward
-to determine based on max-bounds and min-bounds from the font.
- there is some inefficiency introduced in the per-character
-clipping to make what's going on clearer.
-
- (it is possible, for example, for a font to be defined in which the
-next-to-last character in a font would be clipped out, but the last
-one wouldn't. the code below deals with this.)
-
- 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.
-
- the register allocations for startmask and endmask may not
-be the right thing. are there two other deserving candidates?
-xoff, pdst, pglyph, and tmpSrc seem like the right things, though.
-*/
-
-void
-afbImageGlyphBlt(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 */
-{
- ExtentInfoRec info; /* used by QueryGlyphExtents() */
- BoxRec bbox; /* string's bounding box */
- xRectangle backrect;/* backing rectangle to paint.
- in the general case, NOT necessarily
- the same as the string's bounding box
- */
-
- CharInfoPtr pci;
- int xorg, yorg; /* origin of drawable in bitmap */
- int widthDst; /* width of dst in longwords */
-
- /* these keep track of the character origin */
- PixelType *pdstBase;
- /* points to longword with character origin */
- int xchar; /* xorigin of char (mod 32) */
-
- /* these are used for placing the glyph */
- register int xoff; /* x offset of left edge of glyph (mod 32) */
- register PixelType *pdst;
- /* pointer to current longword in dst */
-
- register int d;
- int depthDst;
- int sizeDst;
- int hSave;
- int w; /* width of glyph in bits */
- int h; /* height of glyph */
- int widthGlyph; /* width of glyph, in bytes */
- unsigned char rrops[AFB_MAX_DEPTH];
- register unsigned char *pglyph;
- /* pointer to current row of glyph */
- unsigned char *pglyphSave;
-
- /* used for putting down glyph */
- register PixelType tmpSrc;
- /* for getting bits from glyph */
- register PixelType startmask;
- register PixelType endmask;
-
- register int nFirst;/* bits of glyph in current longword */
- PixelType *pdstSave;
- int oldFill;
- afbPrivGC *pPriv = (afbPrivGC *)dixLookupPrivate(&pGC->devPrivates,
- afbGCPrivateKey);
- xorg = pDrawable->x;
- yorg = pDrawable->y;
- afbGetPixelWidthSizeDepthAndPointer(pDrawable, widthDst, sizeDst, depthDst,
- pdstBase);
-
- QueryGlyphExtents(pGC->font, ppci, (unsigned long)nglyph, &info);
-
- backrect.x = x;
- backrect.y = y - FONTASCENT(pGC->font);
- backrect.width = info.overallWidth;
- backrect.height = FONTASCENT(pGC->font) + FONTDESCENT(pGC->font);
-
- x += xorg;
- y += yorg;
-
- bbox.x1 = x + info.overallLeft;
- bbox.x2 = x + info.overallRight;
- bbox.y1 = y - info.overallAscent;
- bbox.y2 = y + info.overallDescent;
-
- oldFill = pGC->fillStyle;
- pGC->fillStyle = FillSolid;
- afbReduceRop (pGC->alu, pGC->bgPixel, pGC->planemask, pGC->depth,
- pPriv->rrops);
- afbPolyFillRect(pDrawable, pGC, 1, &backrect);
- pGC->fillStyle = oldFill;
- afbReduceRop (pGC->alu, pGC->fgPixel, pGC->planemask, pGC->depth,
- pPriv->rrops);
- afbReduceRop (GXcopy, pGC->fgPixel, pGC->planemask, pGC->depth, rrops);
-
- /* the faint-hearted can open their eyes now */
-
- switch (RECT_IN_REGION(pGC->pScreen, pGC->pCompositeClip, &bbox)) {
- case rgnOUT:
- break;
- case rgnIN:
- pdstBase = afbScanlineNoBankSwitch(pdstBase, x, y, widthDst);
- xchar = x & PIM;
-
- while(nglyph--) {
- pci = *ppci;
- pglyphSave = FONTGLYPHBITS(pglyphBase, pci);
- w = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing;
- hSave = pci->metrics.ascent + pci->metrics.descent;
- widthGlyph = GLYPHWIDTHBYTESPADDED(pci);
- /* start at top scanline of glyph */
- pdstSave = afbScanlineDelta(pdstBase, -pci->metrics.ascent,
- widthDst);
-
- /* find correct word in scanline and x offset within it
- for left edge of glyph
- */
- xoff = xchar + pci->metrics.leftSideBearing;
- if (xoff > PLST) {
- pdstSave++;
- xoff &= PIM;
- } else if (xoff < 0) {
- xoff += PPW;
- pdstSave--;
- }
-
- for (d = 0; d < depthDst; d++) {
- h = hSave;
- pdst = pdstSave;
- pdstSave += sizeDst; /* @@@ NEXT PLANE @@@ */
- pglyph = pglyphSave;
-
- if ((xoff + w) <= PPW) {
- /* glyph all in one longword */
- maskpartialbits(xoff, w, startmask);
-
- switch (rrops[d]) {
- case RROP_BLACK:
- while (h--) {
- getleftbits(pglyph, w, tmpSrc);
- *pdst &= ~(SCRRIGHT(tmpSrc, xoff) & startmask);
- pglyph += widthGlyph;
- afbScanlineInc(pdst, widthDst);
- }
- break;
- case RROP_WHITE:
- while (h--) {
- getleftbits(pglyph, w, tmpSrc);
- *pdst |= SCRRIGHT(tmpSrc, xoff) & startmask;
- pglyph += widthGlyph;
- afbScanlineInc(pdst, widthDst);
- }
- break;
- case RROP_NOP:
- break;
- }
- } else {
- /* glyph crosses longword boundary */
- maskPPWbits(xoff, w, startmask, endmask);
- nFirst = PPW - xoff;
-
- switch (rrops[d]) {
- case RROP_BLACK:
- while (h--) {
- getleftbits(pglyph, w, tmpSrc);
- *pdst &= ~(SCRRIGHT(tmpSrc, xoff) & startmask);
- *(pdst+1) &= ~(SCRLEFT(tmpSrc, nFirst) & endmask);
- pglyph += widthGlyph;
- afbScanlineInc(pdst, widthDst);
- }
- break;
- case RROP_WHITE:
- while (h--) {
- getleftbits(pglyph, w, tmpSrc);
- *pdst |= SCRRIGHT(tmpSrc, xoff) & startmask;
- *(pdst+1) |= SCRLEFT(tmpSrc, nFirst) & endmask;
- pglyph += widthGlyph;
- afbScanlineInc(pdst, widthDst);
- }
- break;
- case RROP_NOP:
- break;
- }
- } /* glyph crosses longwords boundary */
- } /* depth loop */
- /* update character origin */
- x += pci->metrics.characterWidth;
- xchar += pci->metrics.characterWidth;
- if (xchar > PLST) {
- xchar -= PPW;
- pdstBase++;
- } else if (xchar < 0) {
- xchar += PPW;
- pdstBase--;
- }
- ppci++;
- } /* while nglyph-- */
- break;
- case rgnPART:
- {
- afbTEXTPOS *ppos;
- int nbox;
- BoxPtr pbox;
- RegionPtr cclip;
- int xpos; /* x position of char origin */
- int i;
- BoxRec clip;
- int leftEdge, rightEdge;
- int topEdge, bottomEdge;
- int glyphRow; /* first row of glyph not wholly
- clipped out */
- int glyphCol; /* leftmost visible column of glyph */
-#if GETLEFTBITS_ALIGNMENT > 1
- int getWidth; /* bits to get from glyph */
-#endif
-
- if(!(ppos = (afbTEXTPOS *)xalloc(nglyph * sizeof(afbTEXTPOS))))
- return;
-
- pdstBase = afbScanlineNoBankSwitch(pdstBase, x, y, widthDst);
- xpos = x;
- xchar = xpos & PIM;
-
- 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;
-
- hSave = bottomEdge - topEdge;
- if (hSave <= 0)
- continue;
-
- glyphRow = (topEdge - y) + pci->metrics.ascent;
- widthGlyph = ppos[i].widthGlyph;
- pglyphSave = FONTGLYPHBITS(pglyphBase, pci);
- pglyphSave += (glyphRow * widthGlyph);
-
- glyphCol = (leftEdge - ppos[i].xpos) -
- (pci->metrics.leftSideBearing);
-#if GETLEFTBITS_ALIGNMENT > 1
- getWidth = w + glyphCol;
-#endif
-
- pdstSave = afbScanlineDelta(ppos[i].pdstBase, -(y-topEdge),
- widthDst);
- xoff = xchar + (leftEdge - ppos[i].xpos);
- if (xoff > PLST) {
- xoff &= PIM;
- pdstSave++;
- } else if (xoff < 0) {
- xoff += PPW;
- pdstSave--;
- }
-
- for (d = 0; d < depthDst; d++) {
- h = hSave;
- pdst = pdstSave;
- pdstSave += sizeDst; /* @@@ NEXT PLANE @@@ */
- pglyph = pglyphSave;
-
- if ((xoff + w) <= PPW) {
- maskpartialbits(xoff, w, startmask);
-
- switch (rrops[d]) {
- case RROP_BLACK:
- while (h--) {
- getshiftedleftbits(pglyph, glyphCol, getWidth, tmpSrc);
- *pdst &= ~(SCRRIGHT(tmpSrc, xoff) & startmask);
- pglyph += widthGlyph;
- afbScanlineInc(pdst, widthDst);
- }
- break;
- case RROP_WHITE:
- while (h--) {
- getshiftedleftbits(pglyph, glyphCol, getWidth, tmpSrc);
- *pdst |= SCRRIGHT(tmpSrc, xoff) & startmask;
- pglyph += widthGlyph;
- afbScanlineInc(pdst, widthDst);
- }
- break;
- case RROP_NOP:
- break;
- }
- } else {
- maskPPWbits(xoff, w, startmask, endmask);
- nFirst = PPW - xoff;
-
- switch (rrops[d]) {
- case RROP_BLACK:
- while (h--) {
- getshiftedleftbits(pglyph, glyphCol, getWidth, tmpSrc);
- *pdst &= ~(SCRRIGHT(tmpSrc, xoff) & startmask);
- *(pdst+1) &= ~(SCRLEFT(tmpSrc, nFirst) & endmask);
- pglyph += widthGlyph;
- afbScanlineInc(pdst, widthDst);
- }
- break;
- case RROP_WHITE:
- while (h--) {
- getshiftedleftbits(pglyph, glyphCol, getWidth, tmpSrc);
- *pdst |= SCRRIGHT(tmpSrc, xoff) & startmask;
- *(pdst+1) |= SCRLEFT(tmpSrc, nFirst) & endmask;
- pglyph += widthGlyph;
- afbScanlineInc(pdst, widthDst);
- }
- break;
- case RROP_NOP:
- break;
- }
- }
- } /* depth */
- } /* for each glyph */
- } /* while nbox-- */
- xfree(ppos);
- break;
- }
-
- default:
- break;
- }
-}
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