ref: b76e8ecc732cb311ceee6fd6c807b7e784d3fe31
dir: /sys/src/ape/X11/cmd/X/cfb/cfbglblt8.c/
/*
Copyright 1989, 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.
*/
/*
* Poly glyph blt. Accepts an arbitrary font <= 32 bits wide, in Copy mode
* only.
*/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
#include <X11/X.h>
#include <X11/Xmd.h>
#include <X11/Xproto.h>
#include "cfb.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 "cfbmskbits.h"
#include "cfb8bit.h"
#define BOX_OVERLAP(box1, box2, xoffset, yoffset) \
((box1)->x1 <= ((int) (box2)->x2 + (xoffset)) && \
((int) (box2)->x1 + (xoffset)) <= (box1)->x2 && \
(box1)->y1 <= ((int) (box2)->y2 + (yoffset)) && \
((int) (box2)->y1 + (yoffset)) <= (box1)->y2)
#define BOX_CONTAINS(box1, box2, xoffset, yoffset) \
((box1)->x1 <= ((int) (box2)->x1 + (xoffset)) && \
((int) (box2)->x2 + (xoffset)) <= (box1)->x2 && \
(box1)->y1 <= ((int) (box2)->y1 + (yoffset)) && \
((int) (box2)->y2 + (yoffset)) <= (box1)->y2)
#if defined(FOUR_BIT_CODE) || defined(WriteBitGroup) && !defined(GLYPHROP)
#if GLYPHPADBYTES != 4
#define USE_LEFTBITS
#endif
#ifdef USE_LEFTBITS
typedef unsigned char *glyphPointer;
#define GlyphBits(bits,width,dst) getleftbits(bits,width,dst); \
(dst) &= widthMask; \
(bits) += widthGlyph;
#define GlyphBitsS(bits,width,dst,off) GlyphBits(bits,width,dst); \
dst = BitRight (dst, off);
#else
typedef CARD32 *glyphPointer;
#define GlyphBits(bits,width,dst) dst = *bits++;
#define GlyphBitsS(bits,width,dst,off) dst = BitRight(*bits++, off);
#endif
#ifdef GLYPHROP
#define cfbPolyGlyphBlt8 cfbPolyGlyphRop8
#define cfbPolyGlyphBlt8Clipped cfbPolyGlyphRop8Clipped
#undef WriteBitGroup
#define WriteBitGroup(dst,pixel,bits) RRopBitGroup(dst,bits)
#endif
static void cfbPolyGlyphBlt8Clipped(
DrawablePtr pDrawable,
GCPtr pGC,
int x,
int y,
unsigned int nglyph,
CharInfoPtr *ppci, /* array of character info */
unsigned char *pglyphBase); /* start of array of glyphs */
#if defined(HAS_STIPPLE_CODE) && !defined(GLYPHROP) && !defined(USE_LEFTBITS)
#define USE_STIPPLE_CODE
#endif
#if defined(__GNUC__) && !defined(GLYPHROP) && (defined(mc68020) || defined(mc68000) || defined(__mc68000__)) && PSZ == 8 && !defined(USE_LEFTBITS)
#ifdef USE_STIPPLE_CODE
#undef USE_STIPPLE_CODE
#endif
#include "stip68kgnu.h"
#endif
#if PSZ == 24
#define DST_INC 3
#else
#define DST_INC (PGSZB >> PWSH)
#endif
/* cfbStippleStack/cfbStippleStackTE are coded in assembly language.
* They are only provided on some architecures.
*/
#ifdef USE_STIPPLE_CODE
extern void cfbStippleStack (), cfbStippleStackTE ();
#endif
void
cfbPolyGlyphBlt8 (pDrawable, pGC, x, y, nglyph, ppci, pglyphBase)
DrawablePtr pDrawable;
GCPtr pGC;
int x, y;
unsigned int nglyph;
CharInfoPtr *ppci; /* array of character info */
pointer pglyphBase; /* start of array of glyphs */
{
#ifndef GLYPHROP
register CfbBits pixel;
#endif
#if !defined(STIPPLE) && !defined(USE_STIPPLE_CODE)
register CfbBits c;
register CfbBits *dst;
#endif
register glyphPointer glyphBits;
register int xoff;
FontPtr pfont = pGC->font;
CharInfoPtr pci;
CfbBits *dstLine;
CfbBits *pdstBase;
int hTmp;
int bwidthDst;
int widthDst;
int h;
BoxRec bbox; /* for clipping */
int w;
RegionPtr clip;
BoxPtr extents;
#ifdef USE_LEFTBITS
int widthGlyph;
CfbBits widthMask;
#endif
#ifndef STIPPLE
#ifdef USE_STIPPLE_CODE
void (*stipple)();
stipple = cfbStippleStack;
if (FONTCONSTMETRICS(pfont))
stipple = cfbStippleStackTE;
#endif
#endif
x += pDrawable->x;
y += pDrawable->y;
/* compute an approximate (but covering) bounding box */
bbox.x1 = 0;
if ((ppci[0]->metrics.leftSideBearing < 0))
bbox.x1 = ppci[0]->metrics.leftSideBearing;
h = nglyph - 1;
w = ppci[h]->metrics.rightSideBearing;
while (--h >= 0)
w += ppci[h]->metrics.characterWidth;
bbox.x2 = w;
bbox.y1 = -FONTMAXBOUNDS(pfont,ascent);
bbox.y2 = FONTMAXBOUNDS(pfont,descent);
clip = cfbGetCompositeClip(pGC);
extents = &clip->extents;
if (!clip->data)
{
if (!BOX_CONTAINS(extents, &bbox, x, y))
{
if (BOX_OVERLAP (extents, &bbox, x, y))
cfbPolyGlyphBlt8Clipped(pDrawable, pGC, x, y,
nglyph, ppci, pglyphBase);
return;
}
}
else
{
/* check to make sure some of the text appears on the screen */
if (!BOX_OVERLAP (extents, &bbox, x, y))
return;
bbox.x1 += x;
bbox.x2 += x;
bbox.y1 += y;
bbox.y2 += y;
switch (RECT_IN_REGION(pGC->pScreen, clip, &bbox))
{
case rgnPART:
cfbPolyGlyphBlt8Clipped(pDrawable, pGC, x, y,
nglyph, ppci, pglyphBase);
case rgnOUT:
return;
}
}
#ifdef GLYPHROP
cfb8CheckStipple (pGC->alu, pGC->fgPixel, pGC->planemask);
#else
pixel = cfbGetGCPrivate(pGC)->xor;
#endif
cfbGetTypedWidthAndPointer (pDrawable, bwidthDst, pdstBase, char, CfbBits)
widthDst = bwidthDst / PGSZB;
while (nglyph--)
{
pci = *ppci++;
glyphBits = (glyphPointer) FONTGLYPHBITS(pglyphBase,pci);
xoff = x + pci->metrics.leftSideBearing;
#if PSZ == 24
dstLine = pdstBase + (y - pci->metrics.ascent) * widthDst +((xoff>> 2)*3);
#else
dstLine = pdstBase +
(y - pci->metrics.ascent) * widthDst + (xoff >> PWSH);
#endif
x += pci->metrics.characterWidth;
if ((hTmp = pci->metrics.descent + pci->metrics.ascent))
{
#if PSZ == 24
xoff &= 0x03;
#else
xoff &= PIM;
#endif /* PSZ == 24 */
#ifdef STIPPLE
STIPPLE(dstLine,glyphBits,pixel,bwidthDst,hTmp,xoff);
#else
#ifdef USE_STIPPLE_CODE
(*stipple)(dstLine,glyphBits,pixel,bwidthDst,hTmp,xoff);
#else
#ifdef USE_LEFTBITS
w = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing;
widthGlyph = PADGLYPHWIDTHBYTES(w);
widthMask = mfbGetendtab(w);
#endif
do {
dst = dstLine;
dstLine = (CfbBits *) (((char *) dstLine) + bwidthDst);
GlyphBits(glyphBits, w, c)
WriteBitGroup(dst, pixel, GetBitGroup(BitRight(c,xoff)));
dst += DST_INC;
c = BitLeft(c,PGSZB - xoff);
while (c)
{
WriteBitGroup(dst, pixel, GetBitGroup(c));
NextBitGroup(c);
dst += DST_INC;
}
} while (--hTmp);
#endif /* USE_STIPPLE_CODE else */
#endif /* STIPPLE else */
}
}
}
static void
cfbPolyGlyphBlt8Clipped(
DrawablePtr pDrawable,
GCPtr pGC,
int x,
int y,
unsigned int nglyph,
CharInfoPtr *ppci, /* array of character info */
unsigned char *pglyphBase) /* start of array of glyphs */
{
#ifndef GLYPHROP
register CfbBits pixel;
#endif
#if !defined(STIPPLE) && !defined(USE_STIPPLE_CODE)
register CfbBits c;
#endif
register glyphPointer glyphBits;
register int xoff;
#if defined(USE_LEFTBITS) || (!defined(STIPPLE) && !defined(USE_STIPPLE_CODE))
register CfbBits *dst;
#endif
CharInfoPtr pci;
FontPtr pfont = pGC->font;
CfbBits *dstLine;
CfbBits *pdstBase;
#ifdef USE_LEFTBITS
CARD32 *cTmp;
#endif
CARD32 *clips;
int maxAscent, maxDescent;
int minLeftBearing;
int hTmp;
int widthDst;
int bwidthDst;
int xG, yG;
BoxPtr pBox;
int numRects;
int w;
RegionPtr pRegion;
int yBand;
#ifdef GLYPHROP
CfbBits bits;
#endif
#ifdef USE_LEFTBITS
int widthGlyph;
CfbBits widthMask;
#endif
#ifdef GLYPHROP
cfb8CheckStipple (pGC->alu, pGC->fgPixel, pGC->planemask);
#else
pixel = cfbGetGCPrivate(pGC)->xor;
#endif
cfbGetTypedWidthAndPointer (pDrawable, bwidthDst, pdstBase, char, CfbBits)
widthDst = bwidthDst / PGSZB;
maxAscent = FONTMAXBOUNDS(pfont,ascent);
maxDescent = FONTMAXBOUNDS(pfont,descent);
minLeftBearing = FONTMINBOUNDS(pfont,leftSideBearing);
pRegion = cfbGetCompositeClip(pGC);
pBox = REGION_RECTS(pRegion);
numRects = REGION_NUM_RECTS (pRegion);
while (numRects && pBox->y2 <= y - maxAscent)
{
++pBox;
--numRects;
}
if (!numRects || pBox->y1 >= y + maxDescent)
return;
yBand = pBox->y1;
while (numRects && pBox->y1 == yBand && pBox->x2 <= x + minLeftBearing)
{
++pBox;
--numRects;
}
if (!numRects)
return;
clips = (CARD32 *)ALLOCATE_LOCAL ((maxAscent + maxDescent) *
sizeof (CARD32));
while (nglyph--)
{
pci = *ppci++;
glyphBits = (glyphPointer) FONTGLYPHBITS(pglyphBase,pci);
w = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing;
xG = x + pci->metrics.leftSideBearing;
yG = y - pci->metrics.ascent;
x += pci->metrics.characterWidth;
if ((hTmp = pci->metrics.descent + pci->metrics.ascent))
{
#if PSZ == 24
dstLine = pdstBase + yG * widthDst + ((xG>> 2)*3);
/* never use (xG*3)>>2 */
#else
dstLine = pdstBase + yG * widthDst + (xG >> PWSH);
#endif
#if PSZ == 24
xoff = xG & 3;
#else
xoff = xG & PIM;
#endif
#ifdef USE_LEFTBITS
w = pci->metrics.rightSideBearing - pci->metrics.leftSideBearing;
widthGlyph = PADGLYPHWIDTHBYTES(w);
widthMask = mfbGetendtab(w);
#endif
switch (cfb8ComputeClipMasks32 (pBox, numRects, xG, yG, w, hTmp, clips))
{
case rgnPART:
#ifdef USE_LEFTBITS
cTmp = clips;
do {
dst = dstLine;
dstLine = (CfbBits *) (((char *) dstLine) + bwidthDst);
GlyphBits(glyphBits, w, c)
c &= *cTmp++;
if (c)
{
WriteBitGroup(dst, pixel, GetBitGroup(BitRight(c,xoff)));
c = BitLeft(c,PGSZB - xoff);
dst += DST_INC;
while (c)
{
WriteBitGroup(dst, pixel, GetBitGroup(c));
NextBitGroup(c);
dst += DST_INC;
}
}
} while (--hTmp);
break;
#else /* !USE_LEFTBITS */
{
int h;
h = hTmp;
do
{
--h;
clips[h] = clips[h] & glyphBits[h];
} while (h);
}
glyphBits = clips;
/* fall through */
#endif /* USE_LEFTBITS */
case rgnIN:
#ifdef STIPPLE
STIPPLE(dstLine,glyphBits,pixel,bwidthDst,hTmp,xoff);
#else
#ifdef USE_STIPPLE_CODE
cfbStippleStackTE(dstLine,glyphBits,pixel,bwidthDst,hTmp,xoff);
#else
do {
dst = dstLine;
dstLine = (CfbBits *) (((char *) dstLine) + bwidthDst);
GlyphBits(glyphBits, w, c)
if (c)
{
/* This code originally could read memory locations
* that were not mapped. Hence we have to check the
* trailing bits to see whether they are zero and if
* then skip them correctly. This is no problem for
* the GXcopy case, since there only the pixels that
* are non-zero are written ...
*/
#ifndef GLYPHROP
WriteBitGroup(dst, pixel, GetBitGroup(BitRight(c,xoff)));
c = BitLeft(c,PGSZB - xoff);
dst += DST_INC;
#else /* GLYPHROP */
if ((bits = GetBitGroup(BitRight(c,xoff))))
WriteBitGroup(dst, pixel, bits);
c = BitLeft(c,PGSZB - xoff);
dst += DST_INC;
while (c && ((bits = GetBitGroup(c)) == 0))
{
NextBitGroup(c);
dst += DST_INC;
}
#endif /* GLYPHROP */
while (c)
{
WriteBitGroup(dst, pixel, GetBitGroup(c));
NextBitGroup(c);
dst += DST_INC;
}
}
} while (--hTmp);
#endif /* USE_STIPPLE_CODE else */
#endif /* STIPPLE else */
break;
}
}
}
DEALLOCATE_LOCAL (clips);
}
#endif /* FOUR_BIT_CODE */