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xenocara/xserver/fb/fbglyph.c
matthieu 428261197a Upgrade to xorg-server 1.9.2. 
Tested by ajacoutot@, krw@, shadchin@ and jasper@ on various configurations
including multihead with both zaphod and xrandr.
2010-12-05 15:36:02 +00:00

480 lines
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/*
*
* Copyright © 1998 Keith Packard
*
* 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, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD 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 "fb.h"
#include <X11/fonts/fontstruct.h>
#include "dixfontstr.h"
Bool
fbGlyphIn (RegionPtr pRegion,
int x,
int y,
int width,
int height)
{
BoxRec box;
BoxPtr pExtents = RegionExtents(pRegion);
/*
* Check extents by hand to avoid 16 bit overflows
*/
if (x < (int) pExtents->x1)
return FALSE;
if ((int) pExtents->x2 < x + width)
return FALSE;
if (y < (int) pExtents->y1)
return FALSE;
if ((int) pExtents->y2 < y + height)
return FALSE;
box.x1 = x;
box.x2 = x + width;
box.y1 = y;
box.y2 = y + height;
return RegionContainsRect(pRegion, &box) == rgnIN;
}
#ifdef FB_24BIT
#ifndef FBNOPIXADDR
#define WRITE1(d,n,fg) WRITE((d) + (n), (CARD8) fg)
#define WRITE2(d,n,fg) WRITE((CARD16 *) &(d[n]), (CARD16) fg)
#define WRITE4(d,n,fg) WRITE((CARD32 *) &(d[n]), (CARD32) fg)
#if FB_UNIT == 6 && IMAGE_BYTE_ORDER == LSBFirst
#define WRITE8(d) WRITE((FbBits *) &(d[0]), fg)
#else
#define WRITE8(d) WRITE4(d,0,_ABCA), WRITE4(d,4,_BCAB)
#endif
/*
* This is a bit tricky, but it's brief. Write 12 bytes worth
* of dest, which is four pixels, at a time. This gives constant
* code for each pattern as they're always aligned the same
*
* a b c d a b c d a b c d bytes
* A B C A B C A B C A B C pixels
*
* f0 f1 f2
* A B C A B C A B C A B C pixels LSB
* C A B C A B C A B C A B pixels MSB
*
* LSB MSB
* A f0 f1
* B f1 f2
* C f2 f0
* A B f0 f2
* B C f1 f0
* C A f2 f1
* A B C A f0 f1
* B C A B f1 f2
* C A B C f2 f0
*/
#undef _A
#undef _B
#undef _C
#undef _AB
#undef _BC
#undef _CA
#undef _ABCA
#undef _BCAB
#undef _CABC
#if IMAGE_BYTE_ORDER == MSBFirst
#define _A f1
#define _B f2
#define _C f0
#define _AB f2
#define _BC f0
#define _CA f1
#define _ABCA f1
#define _BCAB f2
#define _CABC f0
#define CASE(a,b,c,d) ((a << 3) | (b << 2) | (c << 1) | d)
#else
#define _A f0
#define _B f1
#define _C f2
#define _AB f0
#define _BC f1
#define _CA f2
#define _ABCA f0
#define _BCAB f1
#define _CABC f2
#define CASE(a,b,c,d) (a | (b << 1) | (c << 2) | (d << 3))
#endif
void
fbGlyph24 (FbBits *dstBits,
FbStride dstStride,
int dstBpp,
FbStip *stipple,
FbBits fg,
int x,
int height)
{
int lshift;
FbStip bits;
CARD8 *dstLine;
CARD8 *dst;
FbStip f0, f1, f2;
int n;
int shift;
f0 = fg;
f1 = FbRot24(f0,16);
f2 = FbRot24(f0,8);
dstLine = (CARD8 *) dstBits;
dstLine += (x & ~3) * 3;
dstStride *= (sizeof (FbBits) / sizeof (CARD8));
shift = x & 3;
lshift = 4 - shift;
while (height--)
{
bits = READ(stipple++);
n = lshift;
dst = dstLine;
while (bits)
{
switch (FbStipMoveLsb (FbLeftStipBits (bits, n), 4, n)) {
case CASE(0,0,0,0):
break;
case CASE(1,0,0,0):
WRITE2(dst,0,_AB);
WRITE1(dst,2,_C);
break;
case CASE(0,1,0,0):
WRITE1(dst,3,_A);
WRITE2(dst,4,_BC);
break;
case CASE(1,1,0,0):
WRITE4(dst,0,_ABCA);
WRITE2(dst,4,_BC);
break;
case CASE(0,0,1,0):
WRITE2(dst,6,_AB);
WRITE1(dst,8,_C);
break;
case CASE(1,0,1,0):
WRITE2(dst,0,_AB);
WRITE1(dst,2,_C);
WRITE2(dst,6,_AB);
WRITE1(dst,8,_C);
break;
case CASE(0,1,1,0):
WRITE1(dst,3,_A);
WRITE4(dst,4,_BCAB);
WRITE1(dst,8,_C);
break;
case CASE(1,1,1,0):
WRITE8(dst);
WRITE1(dst,8,_C);
break;
case CASE(0,0,0,1):
WRITE1(dst,9,_A);
WRITE2(dst,10,_BC);
break;
case CASE(1,0,0,1):
WRITE2(dst,0,_AB);
WRITE1(dst,2,_C);
WRITE1(dst,9,_A);
WRITE2(dst,10,_BC);
break;
case CASE(0,1,0,1):
WRITE1(dst,3,_A);
WRITE2(dst,4,_BC);
WRITE1(dst,9,_A);
WRITE2(dst,10,_BC);
break;
case CASE(1,1,0,1):
WRITE4(dst,0,_ABCA);
WRITE2(dst,4,_BC);
WRITE1(dst,9,_A);
WRITE2(dst,10,_BC);
break;
case CASE(0,0,1,1):
WRITE2(dst,6,_AB);
WRITE4(dst,8,_CABC);
break;
case CASE(1,0,1,1):
WRITE2(dst,0,_AB);
WRITE1(dst,2,_C);
WRITE2(dst,6,_AB);
WRITE4(dst,8,_CABC);
break;
case CASE(0,1,1,1):
WRITE1(dst,3,_A);
WRITE4(dst,4,_BCAB);
WRITE4(dst,8,_CABC);
break;
case CASE(1,1,1,1):
WRITE8(dst);
WRITE4(dst,8,_CABC);
break;
}
bits = FbStipLeft (bits, n);
n = 4;
dst += 12;
}
dstLine += dstStride;
}
}
#endif
#endif
void
fbPolyGlyphBlt (DrawablePtr pDrawable,
GCPtr pGC,
int x,
int y,
unsigned int nglyph,
CharInfoPtr *ppci,
pointer pglyphBase)
{
FbGCPrivPtr pPriv = fbGetGCPrivate (pGC);
CharInfoPtr pci;
unsigned char *pglyph; /* pointer bits in glyph */
int gx, gy;
int gWidth, gHeight; /* width and height of glyph */
FbStride gStride; /* stride of glyph */
#ifndef FBNOPIXADDR
void (*glyph) (FbBits *,
FbStride,
int,
FbStip *,
FbBits,
int,
int);
FbBits *dst = 0;
FbStride dstStride = 0;
int dstBpp = 0;
int dstXoff = 0, dstYoff = 0;
glyph = 0;
if (pGC->fillStyle == FillSolid && pPriv->and == 0)
{
dstBpp = pDrawable->bitsPerPixel;
switch (dstBpp) {
case 8: glyph = fbGlyph8; break;
case 16: glyph = fbGlyph16; break;
#ifdef FB_24BIT
case 24: glyph = fbGlyph24; break;
#endif
case 32: glyph = fbGlyph32; break;
}
}
#endif
x += pDrawable->x;
y += pDrawable->y;
while (nglyph--)
{
pci = *ppci++;
pglyph = FONTGLYPHBITS(pglyphBase, pci);
gWidth = GLYPHWIDTHPIXELS(pci);
gHeight = GLYPHHEIGHTPIXELS(pci);
if (gWidth && gHeight)
{
gx = x + pci->metrics.leftSideBearing;
gy = y - pci->metrics.ascent;
#ifndef FBNOPIXADDR
if (glyph && gWidth <= sizeof (FbStip) * 8 &&
fbGlyphIn (fbGetCompositeClip(pGC), gx, gy, gWidth, gHeight))
{
fbGetDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
(*glyph) (dst + (gy + dstYoff) * dstStride,
dstStride,
dstBpp,
(FbStip *) pglyph,
pPriv->xor,
gx + dstXoff,
gHeight);
fbFinishAccess (pDrawable);
}
else
#endif
{
gStride = GLYPHWIDTHBYTESPADDED(pci) / sizeof (FbStip);
fbPushImage (pDrawable,
pGC,
(FbStip *) pglyph,
gStride,
0,
gx,
gy,
gWidth, gHeight);
}
}
x += pci->metrics.characterWidth;
}
}
void
fbImageGlyphBlt (DrawablePtr pDrawable,
GCPtr pGC,
int x,
int y,
unsigned int nglyph,
CharInfoPtr *ppciInit,
pointer pglyphBase)
{
FbGCPrivPtr pPriv = fbGetGCPrivate(pGC);
CharInfoPtr *ppci;
CharInfoPtr pci;
unsigned char *pglyph; /* pointer bits in glyph */
int gWidth, gHeight; /* width and height of glyph */
FbStride gStride; /* stride of glyph */
Bool opaque;
int n;
int gx, gy;
#ifndef FBNOPIXADDR
void (*glyph) (FbBits *,
FbStride,
int,
FbStip *,
FbBits,
int,
int);
FbBits *dst = 0;
FbStride dstStride = 0;
int dstBpp = 0;
int dstXoff = 0, dstYoff = 0;
glyph = 0;
if (pPriv->and == 0)
{
dstBpp = pDrawable->bitsPerPixel;
switch (dstBpp) {
case 8: glyph = fbGlyph8; break;
case 16: glyph = fbGlyph16; break;
#ifdef FB_24BIT
case 24: glyph = fbGlyph24; break;
#endif
case 32: glyph = fbGlyph32; break;
}
}
#endif
x += pDrawable->x;
y += pDrawable->y;
if (TERMINALFONT (pGC->font)
#ifndef FBNOPIXADDR
&& !glyph
#endif
)
{
opaque = TRUE;
}
else
{
int xBack, widthBack;
int yBack, heightBack;
ppci = ppciInit;
n = nglyph;
widthBack = 0;
while (n--)
widthBack += (*ppci++)->metrics.characterWidth;
xBack = x;
if (widthBack < 0)
{
xBack += widthBack;
widthBack = -widthBack;
}
yBack = y - FONTASCENT(pGC->font);
heightBack = FONTASCENT(pGC->font) + FONTDESCENT(pGC->font);
fbSolidBoxClipped (pDrawable,
fbGetCompositeClip(pGC),
xBack,
yBack,
xBack + widthBack,
yBack + heightBack,
fbAnd(GXcopy,pPriv->bg,pPriv->pm),
fbXor(GXcopy,pPriv->bg,pPriv->pm));
opaque = FALSE;
}
ppci = ppciInit;
while (nglyph--)
{
pci = *ppci++;
pglyph = FONTGLYPHBITS(pglyphBase, pci);
gWidth = GLYPHWIDTHPIXELS(pci);
gHeight = GLYPHHEIGHTPIXELS(pci);
if (gWidth && gHeight)
{
gx = x + pci->metrics.leftSideBearing;
gy = y - pci->metrics.ascent;
#ifndef FBNOPIXADDR
if (glyph && gWidth <= sizeof (FbStip) * 8 &&
fbGlyphIn (fbGetCompositeClip(pGC), gx, gy, gWidth, gHeight))
{
fbGetDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
(*glyph) (dst + (gy + dstYoff) * dstStride,
dstStride,
dstBpp,
(FbStip *) pglyph,
pPriv->fg,
gx + dstXoff,
gHeight);
fbFinishAccess (pDrawable);
}
else
#endif
{
gStride = GLYPHWIDTHBYTESPADDED(pci) / sizeof (FbStip);
fbPutXYImage (pDrawable,
fbGetCompositeClip(pGC),
pPriv->fg,
pPriv->bg,
pPriv->pm,
GXcopy,
opaque,
gx,
gy,
gWidth, gHeight,
(FbStip *) pglyph,
gStride,
0);
}
}
x += pci->metrics.characterWidth;
}
}
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