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+/* $Xorg: mfbtegblt.c,v 1.4 2001/02/09 02:05:19 xorgcvs Exp $ */
+/* Combined Purdue/PurduePlus patches, level 2.0, 1/17/89 */
+/***********************************************************
+
+Copyright 1987, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+ All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its
+documentation for any purpose and without fee is hereby granted,
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+#include "X.h"
+#include "Xmd.h"
+#include "Xproto.h"
+#include "mfb.h"
+#include "fontstruct.h"
+#include "dixfontstr.h"
+#include "gcstruct.h"
+#include "windowstr.h"
+#include "scrnintstr.h"
+#include "pixmapstr.h"
+#include "regionstr.h"
+#include "maskbits.h"
+
+/*
+ this works for fonts with glyphs <= PPW bits wide.
+
+ This should be called only with a terminal-emulator font;
+this means that the FIXED_METRICS flag is set, and that
+glyphbounds == charbounds.
+
+ in theory, this goes faster; even if it doesn't, it reduces the
+flicker caused by writing a string over itself with image text (since
+the background gets repainted per character instead of per string.)
+this seems to be important for some converted X10 applications.
+
+ Image text looks at the bits in the glyph and the fg and bg in the
+GC. it paints a rectangle, as defined in the protocol dcoument,
+and the paints the characters.
+
+ to avoid source proliferation, this file is compiled
+two times:
+ MFBTEGLYPHBLT OP
+ mfbTEGlyphBltWhite (white text, black bg )
+ mfbTEGlyphBltBlack ~ (black text, white bg )
+
+*/
+
+#if defined(NO_3_60_CG4) && defined(FASTPUTBITS) && defined(FASTGETBITS)
+#define FASTCHARS
+#endif
+
+/*
+ * this macro "knows" that only characters <= 8 bits wide will
+ * fit this case (which is why it is independent of GLYPHPADBYTES)
+ */
+
+#if (BITMAP_BIT_ORDER == MSBFirst) && (GLYPHPADBYTES != 4)
+#if GLYPHPADBYTES == 1
+#define ShiftAmnt 24
+#else
+#define ShiftAmnt 16
+#endif
+
+/*
+ * Note: for BITMAP_BIT_ORDER != IMAGE_BYTE_ORDER, SCRRIGHT() evaluates its
+ * first argument more than once. Thus the imbedded char++ have to be moved.
+ * (DHD)
+ */
+#if BITMAP_BIT_ORDER == IMAGE_BYTE_ORDER
+#if PPW == 32
+#define GetBits4 c = (*char1++ << ShiftAmnt) | \
+ SCRRIGHT (*char2++ << ShiftAmnt, xoff2) | \
+ SCRRIGHT (*char3++ << ShiftAmnt, xoff3) | \
+ SCRRIGHT (*char4++ << ShiftAmnt, xoff4);
+#else /* PPW */
+#define GetBits4 c = ((unsigned long)(*char1++ << ShiftAmnt) << 32 ) | \
+ (SCRRIGHT (*char2++ << ShiftAmnt, xoff2) << 32 ) | \
+ (SCRRIGHT (*char3++ << ShiftAmnt, xoff3) << 32 ) | \
+ (SCRRIGHT (*char4++ << ShiftAmnt, xoff4) << 32 ) | \
+ (*char5++ << ShiftAmnt) | \
+ SCRRIGHT (*char6++ << ShiftAmnt, xoff6) | \
+ SCRRIGHT (*char7++ << ShiftAmnt, xoff7) | \
+ SCRRIGHT (*char8++ << ShiftAmnt, xoff8);
+#endif /* PPW */
+#else /* BITMAP_BIT_ORDER != IMAGE_BYTE_ORDER */
+#if PPW == 32
+#define GetBits4 c = (*char1++ << ShiftAmnt) | \
+ SCRRIGHT (*char2 << ShiftAmnt, xoff2) | \
+ SCRRIGHT (*char3 << ShiftAmnt, xoff3) | \
+ SCRRIGHT (*char4 << ShiftAmnt, xoff4); \
+ char2++; char3++; char4++;
+#else /* PPW == 64 */
+#define GetBits4 c = ((unsigned long)(*char1++ << ShiftAmnt) << 32 ) | \
+ (SCRRIGHT (*char2 << ShiftAmnt, xoff2) << 32 ) | \
+ (SCRRIGHT (*char3 << ShiftAmnt, xoff3) << 32 ) | \
+ (SCRRIGHT (*char4 << ShiftAmnt, xoff4) << 32 ) | \
+ (*char5++ << ShiftAmnt) | \
+ SCRRIGHT (*char6 << ShiftAmnt, xoff6) | \
+ SCRRIGHT (*char7 << ShiftAmnt, xoff7) | \
+ SCRRIGHT (*char8 << ShiftAmnt, xoff8); \
+ char2++; char3++; char4++; char6++; char7++; char8++;
+#endif /* PPW */
+#endif /* BITMAP_BIT_ORDER == IMAGE_BYTE_ORDER */
+
+#else /* (BITMAP_BIT_ORDER != MSBFirst) || (GLYPHPADBYTES == 4) */
+
+#if BITMAP_BIT_ORDER == IMAGE_BYTE_ORDER
+#if PPW == 32
+#define GetBits4 c = *char1++ | \
+ SCRRIGHT (*char2++, xoff2) | \
+ SCRRIGHT (*char3++, xoff3) | \
+ SCRRIGHT (*char4++, xoff4);
+#else /* PPW == 64 */
+#define GetBits4 c = (unsigned long)(((*char1++) << 64 ) | \
+ (SCRRIGHT (*char2++, xoff2) << 64 ) | \
+ (SCRRIGHT (*char3++, xoff3) << 64 ) | \
+ (SCRRIGHT (*char4++, xoff4) << 64 ) | \
+ SCRRIGHT (*char5++, xoff5) | \
+ SCRRIGHT (*char6++, xoff6) | \
+ SCRRIGHT (*char7++, xoff7) | \
+ SCRRIGHT (*char8++, xoff8));
+#endif /* PPW */
+#else /* BITMAP_BIT_ORDER != IMAGE_BYTE_ORDER */
+#if PPW == 32
+#define GetBits4 c = *char1++ | \
+ SCRRIGHT (*char2, xoff2) | \
+ SCRRIGHT (*char3, xoff3) | \
+ SCRRIGHT (*char4, xoff4); \
+ char2++; char3++; char4++;
+#else /* PPW == 64 */
+#define GetBits4 c = (unsigned long)(((*char1++) << 64 ) | \
+ (SCRRIGHT (*char2, xoff2) << 64 ) | \
+ (SCRRIGHT (*char3, xoff3) << 64 ) | \
+ (SCRRIGHT (*char4, xoff4) << 64 ) | \
+ SCRRIGHT (*char5, xoff5) | \
+ SCRRIGHT (*char6, xoff6) | \
+ SCRRIGHT (*char7, xoff7) | \
+ SCRRIGHT (*char8, xoff8)); \
+ char2++; char3++; char4++; \
+ char5++; char6++; char7++; char8++;
+#endif /* PPW */
+#endif /* BITMAP_BIT_ORDER == IMAGE_BYTE_ORDER */
+
+#endif /* BITMAP_BIT_ORDER && GLYPHPADBYTES */
+
+
+#if GLYPHPADBYTES == 1
+typedef unsigned char *glyphPointer;
+#define USE_LEFTBITS
+#endif
+
+#if GLYPHPADBYTES == 2
+typedef unsigned short *glyphPointer;
+#define USE_LEFTBITS
+#endif
+
+#if GLYPHPADBYTES == 4
+typedef unsigned int *glyphPointer;
+#endif
+
+#ifdef USE_LEFTBITS
+#define GetBits1 getleftbits (char1, widthGlyph, c); \
+ c &= glyphMask; \
+ char1 = (glyphPointer) (((char *) char1) + glyphBytes);
+#else
+#define GetBits1 c = *char1++;
+#endif
+
+void
+MFBTEGLYPHBLT(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
+ DrawablePtr pDrawable;
+ GC *pGC;
+ int x, y;
+ unsigned int nglyph;
+ CharInfoPtr *ppci; /* array of character info */
+ pointer pglyphBase; /* start of array of glyphs */
+{
+ FontPtr pfont = pGC->font;
+ int widthDst;
+ PixelType *pdstBase; /* pointer to longword with top row
+ of current glyph */
+
+ int h; /* height of glyph and char */
+ register int xpos; /* current x */
+ int ypos; /* current y */
+ int widthGlyph;
+
+ int hTmp; /* counter for height */
+ register PixelType startmask, endmask;
+ int nfirst; /* used if glyphs spans a longword boundary */
+ BoxRec bbox; /* for clipping */
+ int widthGlyphs;
+ register PixelType *dst;
+ register PixelType c;
+ register int xoff1, xoff2, xoff3, xoff4;
+ register glyphPointer char1, char2, char3, char4;
+#if PPW == 64
+ register int xoff5, xoff6, xoff7, xoff8;
+ register glyphPointer char5, char6, char7, char8;
+#endif /* PPW */
+
+#ifdef USE_LEFTBITS
+ register PixelType glyphMask;
+ register PixelType tmpSrc;
+ register int glyphBytes;
+#endif
+
+ if (!(pGC->planemask & 1))
+ return;
+
+ mfbGetPixelWidthAndPointer(pDrawable, widthDst, pdstBase);
+
+ xpos = x + pDrawable->x;
+ ypos = y + pDrawable->y;
+
+ widthGlyph = FONTMAXBOUNDS(pfont,characterWidth);
+ h = FONTASCENT(pfont) + FONTDESCENT(pfont);
+
+ xpos += FONTMAXBOUNDS(pfont,leftSideBearing);
+ ypos -= FONTASCENT(pfont);
+
+ bbox.x1 = xpos;
+ bbox.x2 = xpos + (widthGlyph * nglyph);
+ bbox.y1 = ypos;
+ bbox.y2 = ypos + h;
+
+ switch (RECT_IN_REGION(pGC->pScreen,
+ ((mfbPrivGC *)(pGC->devPrivates[mfbGCPrivateIndex].ptr))->pCompositeClip, &bbox))
+ {
+ case rgnPART:
+ /* this is the WRONG thing to do, but it works.
+ calling the non-terminal text is easy, but slow, given
+ what we know about the font.
+
+ the right thing to do is something like:
+ for each clip rectangle
+ compute at which row the glyph starts to be in it,
+ and at which row the glyph ceases to be in it
+ compute which is the first glyph inside the left
+ edge, and the last one inside the right edge
+ draw a fractional first glyph, using only
+ the rows we know are in
+ draw all the whole glyphs, using the appropriate rows
+ draw any pieces of the last glyph, using the right rows
+
+ this way, the code would take advantage of knowing that
+ all glyphs are the same height and don't overlap.
+
+ one day...
+ */
+ CLIPTETEXT(pDrawable, pGC, x, y, nglyph, ppci, pglyphBase);
+ case rgnOUT:
+ return;
+ }
+ pdstBase = mfbScanlineDeltaNoBankSwitch(pdstBase, ypos, widthDst);
+ widthGlyphs = widthGlyph * PGSZB;
+
+#ifdef USE_LEFTBITS
+ glyphMask = endtab[widthGlyph];
+ glyphBytes = GLYPHWIDTHBYTESPADDED(*ppci);
+#endif
+
+ if (nglyph >= PGSZB && widthGlyphs <= PPW)
+ {
+ while (nglyph >= PGSZB)
+ {
+ nglyph -= PGSZB;
+ xoff1 = xpos & PIM;
+ xoff2 = widthGlyph;
+ xoff3 = xoff2 + widthGlyph;
+ xoff4 = xoff3 + widthGlyph;
+#if PPW == 64
+ xoff5 = xoff4 + widthGlyph;
+ xoff6 = xoff5 + widthGlyph;
+ xoff7 = xoff6 + widthGlyph;
+ xoff8 = xoff7 + widthGlyph;
+#endif /* PPW */
+ char1 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++));
+ char2 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++));
+ char3 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++));
+ char4 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++));
+#if PPW == 64
+ char5 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++));
+ char6 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++));
+ char7 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++));
+ char8 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++));
+#endif /* PPW */
+
+ hTmp = h;
+ dst = mfbScanlineOffset(pdstBase, (xpos >> PWSH)); /* switch now */
+
+#ifndef FASTCHARS
+ if (xoff1 + widthGlyphs <= PPW)
+ {
+ maskpartialbits (xoff1, widthGlyphs, startmask);
+#endif
+ while (hTmp--)
+ {
+ GetBits4
+#ifdef FASTCHARS
+# if BITMAP_BIT_ORDER == MSBFirst
+ c >>= PPW - widthGlyphs;
+# endif
+ FASTPUTBITS(OP(c), xoff1, widthGlyphs, dst);
+#else
+ *(dst) = (*dst) & ~startmask | OP(SCRRIGHT(c, xoff1)) & startmask;
+#endif
+ mfbScanlineInc(dst, widthDst);
+ }
+#ifndef FASTCHARS
+ }
+ else
+ {
+ maskPPWbits (xoff1, widthGlyphs, startmask, endmask);
+ nfirst = PPW - xoff1;
+ while (hTmp--)
+ {
+ GetBits4
+ dst[0] = dst[0] & ~startmask |
+ OP(SCRRIGHT(c,xoff1)) & startmask;
+ dst[1] = dst[1] & ~endmask |
+ OP(SCRLEFT(c,nfirst)) & endmask;
+ mfbScanlineInc(dst, widthDst);
+ }
+ }
+#endif
+ xpos += widthGlyphs;
+ }
+ }
+
+ while(nglyph--)
+ {
+ xoff1 = xpos & PIM;
+ char1 = (glyphPointer) FONTGLYPHBITS(pglyphBase,(*ppci++));
+ hTmp = h;
+ dst = mfbScanlineOffset(pdstBase, (xpos >> PWSH));
+
+#ifndef FASTCHARS
+ if (xoff1 + widthGlyph <= PPW)
+ {
+ maskpartialbits (xoff1, widthGlyph, startmask);
+#endif
+ while (hTmp--)
+ {
+#ifdef FASTCHARS
+#ifdef USE_LEFTBITS
+ FASTGETBITS (char1,0,widthGlyph,c);
+ char1 = (glyphPointer) (((char *) char1) + glyphBytes);
+#else
+ c = *char1++;
+#if BITMAP_BIT_ORDER == MSBFirst
+ c >>= PPW - widthGlyph;
+#endif
+#endif
+ FASTPUTBITS (OP(c),xoff1,widthGlyph,dst);
+#else
+ GetBits1
+ (*dst) = (*dst) & ~startmask | OP(SCRRIGHT(c, xoff1)) & startmask;
+#endif
+ mfbScanlineInc(dst, widthDst);
+ }
+#ifndef FASTCHARS
+ }
+ else
+ {
+ maskPPWbits (xoff1, widthGlyph, startmask, endmask);
+ nfirst = PPW - xoff1;
+ while (hTmp--)
+ {
+ GetBits1
+ dst[0] = dst[0] & ~startmask |
+ OP(SCRRIGHT(c,xoff1)) & startmask;
+ dst[1] = dst[1] & ~endmask |
+ OP(SCRLEFT(c,nfirst)) & endmask;
+ mfbScanlineInc(dst, widthDst);
+ }
+ }
+#endif
+ xpos += widthGlyph;
+ }
+}
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