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xserver-multidpi/fb/fbglyph.c
Aaron Plattner a4005c15fb Add framebuffer access wrapper infrastructure. 
Create fbPrepareAccess macros to call into the driver to set up the
wfbReadMemory and wfbWriteWemory pointers.  Call these from fbGetDrawable and
fbGetStipDrawable.

Add the READ and WRITE macros, which expand to simple memory accesses for fb,
and calls through the function pointers for wfb.

Add fbFinishAccess macro to give the driver an opportunity to clean up.  Add
calls to this in the appropriate places.
2006-07-26 15:48:51 -07:00

482 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"
#define dummyScreen screenInfo.screens[0]
Bool
fbGlyphIn (RegionPtr pRegion,
int x,
int y,
int width,
int height)
{
BoxRec box;
BoxPtr pExtents = REGION_EXTENTS (dummyScreen, 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 RECT_IN_REGION (dummyScreen, pRegion, &box) == rgnIN;
}
#ifdef FB_24BIT
#ifndef FBNOPIXADDR
#define WRITE1(d,n,fg) ((d)[n] = (CARD8) fg)
#define WRITE2(d,n,fg) (*(CARD16 *) &(d[n]) = (CARD16) fg)
#define WRITE4(d,n,fg) (*(CARD32 *) &(d[n]) = (CARD32) fg)
#if FB_UNIT == 6 && IMAGE_BYTE_ORDER == LSBFirst
#define WRITE8(d) (*(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 = *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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