d6cbd4511e
This is the biggest "visibility" patch. Instead of doing a "export" symbol on demand, export everything in the sdk, so that if some module fails due to an unresolved symbol, it is because it is using a symbol not in the sdk. Most exported symbols shouldn't really be made visible, neither advertised in the sdk, as they are only used by a single shared object. Symbols in the sdk (or referenced in sdk macros), but not defined anywhere include: XkbBuildCoreState() XkbInitialMap XkbXIUnsupported XkbCheckActionVMods() XkbSendCompatNotify() XkbDDXFakePointerButton() XkbDDXApplyConfig() _XkbStrCaseCmp() _XkbErrMessages[] _XkbErrCode _XkbErrLocation _XkbErrData XkbAccessXDetailText() XkbNKNDetailMaskText() XkbLookupGroupAndLevel() XkbInitAtoms() XkbGetOrderedDrawables() XkbFreeOrderedDrawables() XkbConvertXkbComponents() XkbWriteXKBSemantics() XkbWriteXKBLayout() XkbWriteXKBKeymap() XkbWriteXKBFile() XkbWriteCFile() XkbWriteXKMFile() XkbWriteToServer() XkbMergeFile() XkmFindTOCEntry() XkmReadFileSection() XkmReadFileSectionName() InitExtInput() xf86CheckButton() xf86SwitchCoreDevice() RamDacSetGamma() RamDacRestoreDACValues() xf86Bpp xf86ConfigPix24 xf86MouseCflags[] xf86SupportedMouseTypes[] xf86NumMouseTypes xf86ChangeBusIndex() xf86EntityEnter() xf86EntityLeave() xf86WrapperInit() xf86RingBell() xf86findOptionBoolean() xf86debugListOptions() LoadSubModuleLocal() LoaderSymbolLocal() getInt10Rec() xf86CurrentScreen xf86ReallocatePciResources() xf86NewSerialNumber() xf86RandRSetInitialMode() fbCompositeSolidMask_nx1xn fbCompositeSolidMask_nx8888x0565C fbCompositeSolidMask_nx8888x8888C fbCompositeSolidMask_nx8x0565 fbCompositeSolidMask_nx8x0888 fbCompositeSolidMask_nx8x8888 fbCompositeSrc_0565x0565 fbCompositeSrc_8888x0565 fbCompositeSrc_8888x0888 fbCompositeSrc_8888x8888 fbCompositeSrcAdd_1000x1000 fbCompositeSrcAdd_8000x8000 fbCompositeSrcAdd_8888x8888 fbGeneration fbIn fbOver fbOver24 fbOverlayGeneration fbRasterizeEdges fbRestoreAreas fbSaveAreas composeFunctions VBEBuildVbeModeList() VBECalcVbeModeIndex() TIramdac3030CalculateMNPForClock() shadowBufPtr shadowFindBuf() miRRGetScreenInfo() RRSetScreenConfig() RRModePruneUnused() PixmanImageFromPicture() extern int miPointerGetMotionEvents() miClipPicture() miRasterizeTriangle() fbPush1toN() fbInitializeBackingStore() ddxBeforeReset() SetupSprite() InitSprite() DGADeliverEvent() SPECIAL CASES o defined as _X_INTERNAL xf86NewInputDevice() o defined as static fbGCPrivateKey fbOverlayScreenPrivateKey fbScreenPrivateKey fbWinPrivateKey o defined in libXfont.so, but declared in xorg/dixfont.h GetGlyphs() QueryGlyphExtents() QueryTextExtents() ParseGlyphCachingMode() InitGlyphCaching() SetGlyphCachingMode()
735 lines
15 KiB
C
735 lines
15 KiB
C
/*
|
|
* 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 <stdlib.h>
|
|
|
|
#include "fb.h"
|
|
#include "miline.h"
|
|
|
|
#define fbBresShiftMask(mask,dir,bpp) ((bpp == FB_STIP_UNIT) ? 0 : \
|
|
((dir < 0) ? FbStipLeft(mask,bpp) : \
|
|
FbStipRight(mask,bpp)))
|
|
|
|
_X_EXPORT void
|
|
fbBresSolid (DrawablePtr pDrawable,
|
|
GCPtr pGC,
|
|
int dashOffset,
|
|
int signdx,
|
|
int signdy,
|
|
int axis,
|
|
int x1,
|
|
int y1,
|
|
int e,
|
|
int e1,
|
|
int e3,
|
|
int len)
|
|
{
|
|
FbStip *dst;
|
|
FbStride dstStride;
|
|
int dstBpp;
|
|
int dstXoff, dstYoff;
|
|
FbGCPrivPtr pPriv = fbGetGCPrivate (pGC);
|
|
FbStip and = (FbStip) pPriv->and;
|
|
FbStip xor = (FbStip) pPriv->xor;
|
|
FbStip mask, mask0;
|
|
FbStip bits;
|
|
|
|
fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
|
|
dst += ((y1 + dstYoff) * dstStride);
|
|
x1 = (x1 + dstXoff) * dstBpp;
|
|
dst += x1 >> FB_STIP_SHIFT;
|
|
x1 &= FB_STIP_MASK;
|
|
mask0 = FbStipMask(0, dstBpp);
|
|
mask = FbStipRight (mask0, x1);
|
|
if (signdx < 0)
|
|
mask0 = FbStipRight (mask0, FB_STIP_UNIT - dstBpp);
|
|
if (signdy < 0)
|
|
dstStride = -dstStride;
|
|
if (axis == X_AXIS)
|
|
{
|
|
bits = 0;
|
|
while (len--)
|
|
{
|
|
bits |= mask;
|
|
mask = fbBresShiftMask(mask,signdx,dstBpp);
|
|
if (!mask)
|
|
{
|
|
WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));
|
|
bits = 0;
|
|
dst += signdx;
|
|
mask = mask0;
|
|
}
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));
|
|
bits = 0;
|
|
dst += dstStride;
|
|
e += e3;
|
|
}
|
|
}
|
|
if (bits)
|
|
WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, bits));
|
|
}
|
|
else
|
|
{
|
|
while (len--)
|
|
{
|
|
WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, mask));
|
|
dst += dstStride;
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
e += e3;
|
|
mask = fbBresShiftMask(mask,signdx,dstBpp);
|
|
if (!mask)
|
|
{
|
|
dst += signdx;
|
|
mask = mask0;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
fbFinishAccess (pDrawable);
|
|
}
|
|
|
|
_X_EXPORT void
|
|
fbBresDash (DrawablePtr pDrawable,
|
|
GCPtr pGC,
|
|
int dashOffset,
|
|
int signdx,
|
|
int signdy,
|
|
int axis,
|
|
int x1,
|
|
int y1,
|
|
int e,
|
|
int e1,
|
|
int e3,
|
|
int len)
|
|
{
|
|
FbStip *dst;
|
|
FbStride dstStride;
|
|
int dstBpp;
|
|
int dstXoff, dstYoff;
|
|
FbGCPrivPtr pPriv = fbGetGCPrivate (pGC);
|
|
FbStip and = (FbStip) pPriv->and;
|
|
FbStip xor = (FbStip) pPriv->xor;
|
|
FbStip bgand = (FbStip) pPriv->bgand;
|
|
FbStip bgxor = (FbStip) pPriv->bgxor;
|
|
FbStip mask, mask0;
|
|
FbDashDeclare;
|
|
int dashlen;
|
|
Bool even;
|
|
Bool doOdd;
|
|
|
|
fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
|
|
doOdd = pGC->lineStyle == LineDoubleDash;
|
|
|
|
FbDashInit (pGC, pPriv, dashOffset, dashlen, even);
|
|
|
|
dst += ((y1 + dstYoff) * dstStride);
|
|
x1 = (x1 + dstXoff) * dstBpp;
|
|
dst += x1 >> FB_STIP_SHIFT;
|
|
x1 &= FB_STIP_MASK;
|
|
mask0 = FbStipMask(0, dstBpp);
|
|
mask = FbStipRight (mask0, x1);
|
|
if (signdx < 0)
|
|
mask0 = FbStipRight (mask0, FB_STIP_UNIT - dstBpp);
|
|
if (signdy < 0)
|
|
dstStride = -dstStride;
|
|
while (len--)
|
|
{
|
|
if (even)
|
|
WRITE(dst, FbDoMaskRRop (READ(dst), and, xor, mask));
|
|
else if (doOdd)
|
|
WRITE(dst, FbDoMaskRRop (READ(dst), bgand, bgxor, mask));
|
|
if (axis == X_AXIS)
|
|
{
|
|
mask = fbBresShiftMask(mask,signdx,dstBpp);
|
|
if (!mask)
|
|
{
|
|
dst += signdx;
|
|
mask = mask0;
|
|
}
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
dst += dstStride;
|
|
e += e3;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dst += dstStride;
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
e += e3;
|
|
mask = fbBresShiftMask(mask,signdx,dstBpp);
|
|
if (!mask)
|
|
{
|
|
dst += signdx;
|
|
mask = mask0;
|
|
}
|
|
}
|
|
}
|
|
FbDashStep (dashlen, even);
|
|
}
|
|
|
|
fbFinishAccess (pDrawable);
|
|
}
|
|
|
|
_X_EXPORT void
|
|
fbBresFill (DrawablePtr pDrawable,
|
|
GCPtr pGC,
|
|
int dashOffset,
|
|
int signdx,
|
|
int signdy,
|
|
int axis,
|
|
int x1,
|
|
int y1,
|
|
int e,
|
|
int e1,
|
|
int e3,
|
|
int len)
|
|
{
|
|
while (len--)
|
|
{
|
|
fbFill (pDrawable, pGC, x1, y1, 1, 1);
|
|
if (axis == X_AXIS)
|
|
{
|
|
x1 += signdx;
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
e += e3;
|
|
y1 += signdy;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
y1 += signdy;
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
e += e3;
|
|
x1 += signdx;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
fbSetFg (DrawablePtr pDrawable,
|
|
GCPtr pGC,
|
|
Pixel fg)
|
|
{
|
|
if (fg != pGC->fgPixel)
|
|
{
|
|
DoChangeGC (pGC, GCForeground, (XID *) &fg, FALSE);
|
|
ValidateGC (pDrawable, pGC);
|
|
}
|
|
}
|
|
|
|
_X_EXPORT void
|
|
fbBresFillDash (DrawablePtr pDrawable,
|
|
GCPtr pGC,
|
|
int dashOffset,
|
|
int signdx,
|
|
int signdy,
|
|
int axis,
|
|
int x1,
|
|
int y1,
|
|
int e,
|
|
int e1,
|
|
int e3,
|
|
int len)
|
|
{
|
|
FbGCPrivPtr pPriv = fbGetGCPrivate (pGC);
|
|
FbDashDeclare;
|
|
int dashlen;
|
|
Bool even;
|
|
Bool doOdd;
|
|
Bool doBg;
|
|
Pixel fg, bg;
|
|
|
|
fg = pGC->fgPixel;
|
|
bg = pGC->bgPixel;
|
|
|
|
/* whether to fill the odd dashes */
|
|
doOdd = pGC->lineStyle == LineDoubleDash;
|
|
/* whether to switch fg to bg when filling odd dashes */
|
|
doBg = doOdd && (pGC->fillStyle == FillSolid ||
|
|
pGC->fillStyle == FillStippled);
|
|
|
|
/* compute current dash position */
|
|
FbDashInit (pGC, pPriv, dashOffset, dashlen, even);
|
|
|
|
while (len--)
|
|
{
|
|
if (even || doOdd)
|
|
{
|
|
if (doBg)
|
|
{
|
|
if (even)
|
|
fbSetFg (pDrawable, pGC, fg);
|
|
else
|
|
fbSetFg (pDrawable, pGC, bg);
|
|
}
|
|
fbFill (pDrawable, pGC, x1, y1, 1, 1);
|
|
}
|
|
if (axis == X_AXIS)
|
|
{
|
|
x1 += signdx;
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
e += e3;
|
|
y1 += signdy;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
y1 += signdy;
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
e += e3;
|
|
x1 += signdx;
|
|
}
|
|
}
|
|
FbDashStep (dashlen, even);
|
|
}
|
|
if (doBg)
|
|
fbSetFg (pDrawable, pGC, fg);
|
|
}
|
|
|
|
#ifdef FB_24BIT
|
|
static void
|
|
fbBresSolid24RRop (DrawablePtr pDrawable,
|
|
GCPtr pGC,
|
|
int dashOffset,
|
|
int signdx,
|
|
int signdy,
|
|
int axis,
|
|
int x1,
|
|
int y1,
|
|
int e,
|
|
int e1,
|
|
int e3,
|
|
int len)
|
|
{
|
|
FbStip *dst;
|
|
FbStride dstStride;
|
|
int dstBpp;
|
|
int dstXoff, dstYoff;
|
|
FbGCPrivPtr pPriv = fbGetGCPrivate (pGC);
|
|
FbStip and = pPriv->and;
|
|
FbStip xor = pPriv->xor;
|
|
FbStip leftMask, rightMask;
|
|
int nl;
|
|
FbStip *d;
|
|
int x;
|
|
int rot;
|
|
FbStip andT, xorT;
|
|
|
|
fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
|
|
dst += ((y1 + dstYoff) * dstStride);
|
|
x1 = (x1 + dstXoff) * 24;
|
|
if (signdy < 0)
|
|
dstStride = -dstStride;
|
|
signdx *= 24;
|
|
while (len--)
|
|
{
|
|
d = dst + (x1 >> FB_STIP_SHIFT);
|
|
x = x1 & FB_STIP_MASK;
|
|
rot = FbFirst24Rot (x);
|
|
andT = FbRot24Stip(and,rot);
|
|
xorT = FbRot24Stip(xor,rot);
|
|
FbMaskStip (x, 24, leftMask, nl, rightMask);
|
|
if (leftMask)
|
|
{
|
|
WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, leftMask));
|
|
d++;
|
|
andT = FbNext24Stip (andT);
|
|
xorT = FbNext24Stip (xorT);
|
|
}
|
|
if (rightMask)
|
|
WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, rightMask));
|
|
if (axis == X_AXIS)
|
|
{
|
|
x1 += signdx;
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
e += e3;
|
|
dst += dstStride;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dst += dstStride;
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
e += e3;
|
|
x1 += signdx;
|
|
}
|
|
}
|
|
}
|
|
|
|
fbFinishAccess (pDrawable);
|
|
}
|
|
|
|
static void
|
|
fbBresDash24RRop (DrawablePtr pDrawable,
|
|
GCPtr pGC,
|
|
int dashOffset,
|
|
int signdx,
|
|
int signdy,
|
|
int axis,
|
|
int x1,
|
|
int y1,
|
|
int e,
|
|
int e1,
|
|
int e3,
|
|
int len)
|
|
{
|
|
FbStip *dst;
|
|
FbStride dstStride;
|
|
int dstBpp;
|
|
int dstXoff, dstYoff;
|
|
FbGCPrivPtr pPriv = fbGetGCPrivate (pGC);
|
|
FbStip andT, xorT;
|
|
FbStip fgand = pPriv->and;
|
|
FbStip fgxor = pPriv->xor;
|
|
FbStip bgand = pPriv->bgand;
|
|
FbStip bgxor = pPriv->bgxor;
|
|
FbStip leftMask, rightMask;
|
|
int nl;
|
|
FbStip *d;
|
|
int x;
|
|
int rot;
|
|
FbDashDeclare;
|
|
int dashlen;
|
|
Bool even;
|
|
Bool doOdd;
|
|
|
|
fbGetStipDrawable (pDrawable, dst, dstStride, dstBpp, dstXoff, dstYoff);
|
|
doOdd = pGC->lineStyle == LineDoubleDash;
|
|
|
|
/* compute current dash position */
|
|
FbDashInit(pGC, pPriv, dashOffset, dashlen, even);
|
|
|
|
dst += ((y1 + dstYoff) * dstStride);
|
|
x1 = (x1 + dstXoff) * 24;
|
|
if (signdy < 0)
|
|
dstStride = -dstStride;
|
|
signdx *= 24;
|
|
while (len--)
|
|
{
|
|
if (even || doOdd)
|
|
{
|
|
if (even)
|
|
{
|
|
andT = fgand;
|
|
xorT = fgxor;
|
|
}
|
|
else
|
|
{
|
|
andT = bgand;
|
|
xorT = bgxor;
|
|
}
|
|
d = dst + (x1 >> FB_STIP_SHIFT);
|
|
x = x1 & FB_STIP_MASK;
|
|
rot = FbFirst24Rot (x);
|
|
andT = FbRot24Stip (andT, rot);
|
|
xorT = FbRot24Stip (xorT, rot);
|
|
FbMaskStip (x, 24, leftMask, nl, rightMask);
|
|
if (leftMask)
|
|
{
|
|
WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, leftMask));
|
|
d++;
|
|
andT = FbNext24Stip (andT);
|
|
xorT = FbNext24Stip (xorT);
|
|
}
|
|
if (rightMask)
|
|
WRITE(d, FbDoMaskRRop (READ(d), andT, xorT, rightMask));
|
|
}
|
|
if (axis == X_AXIS)
|
|
{
|
|
x1 += signdx;
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
e += e3;
|
|
dst += dstStride;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dst += dstStride;
|
|
e += e1;
|
|
if (e >= 0)
|
|
{
|
|
e += e3;
|
|
x1 += signdx;
|
|
}
|
|
}
|
|
FbDashStep (dashlen, even);
|
|
}
|
|
|
|
fbFinishAccess (pDrawable);
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* For drivers that want to bail drawing some lines, this
|
|
* function takes care of selecting the appropriate rasterizer
|
|
* based on the contents of the specified GC.
|
|
*/
|
|
|
|
_X_EXPORT FbBres *
|
|
fbSelectBres (DrawablePtr pDrawable,
|
|
GCPtr pGC)
|
|
{
|
|
FbGCPrivPtr pPriv = fbGetGCPrivate(pGC);
|
|
int dstBpp = pDrawable->bitsPerPixel;
|
|
FbBres * bres;
|
|
|
|
if (pGC->lineStyle == LineSolid)
|
|
{
|
|
bres = fbBresFill;
|
|
if (pGC->fillStyle == FillSolid)
|
|
{
|
|
bres = fbBresSolid;
|
|
#ifdef FB_24BIT
|
|
if (dstBpp == 24)
|
|
bres = fbBresSolid24RRop;
|
|
#endif
|
|
#ifndef FBNOPIXADDR
|
|
if (pPriv->and == 0)
|
|
{
|
|
switch (dstBpp) {
|
|
case 8: bres = fbBresSolid8; break;
|
|
case 16: bres = fbBresSolid16; break;
|
|
#ifdef FB_24BIT
|
|
case 24: bres = fbBresSolid24; break;
|
|
#endif
|
|
case 32: bres = fbBresSolid32; break;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
else
|
|
{
|
|
bres = fbBresFillDash;
|
|
if (pGC->fillStyle == FillSolid)
|
|
{
|
|
bres = fbBresDash;
|
|
#ifdef FB_24BIT
|
|
if (dstBpp == 24)
|
|
bres = fbBresDash24RRop;
|
|
#endif
|
|
#ifndef FBNOPIXADDR
|
|
if (pPriv->and == 0 &&
|
|
(pGC->lineStyle == LineOnOffDash || pPriv->bgand == 0))
|
|
{
|
|
switch (dstBpp) {
|
|
case 8: bres = fbBresDash8; break;
|
|
case 16: bres = fbBresDash16; break;
|
|
#ifdef FB_24BIT
|
|
case 24: bres = fbBresDash24; break;
|
|
#endif
|
|
case 32: bres = fbBresDash32; break;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
return bres;
|
|
}
|
|
|
|
_X_EXPORT void
|
|
fbBres (DrawablePtr pDrawable,
|
|
GCPtr pGC,
|
|
int dashOffset,
|
|
int signdx,
|
|
int signdy,
|
|
int axis,
|
|
int x1,
|
|
int y1,
|
|
int e,
|
|
int e1,
|
|
int e3,
|
|
int len)
|
|
{
|
|
(*fbSelectBres (pDrawable, pGC)) (pDrawable, pGC, dashOffset,
|
|
signdx, signdy, axis, x1, y1,
|
|
e, e1, e3, len);
|
|
}
|
|
|
|
_X_EXPORT void
|
|
fbSegment (DrawablePtr pDrawable,
|
|
GCPtr pGC,
|
|
int x1,
|
|
int y1,
|
|
int x2,
|
|
int y2,
|
|
Bool drawLast,
|
|
int *dashOffset)
|
|
{
|
|
FbBres * bres;
|
|
RegionPtr pClip = fbGetCompositeClip(pGC);
|
|
BoxPtr pBox;
|
|
int nBox;
|
|
int adx; /* abs values of dx and dy */
|
|
int ady;
|
|
int signdx; /* sign of dx and dy */
|
|
int signdy;
|
|
int e, e1, e2, e3; /* bresenham error and increments */
|
|
int len; /* length of segment */
|
|
int axis; /* major axis */
|
|
int octant;
|
|
int dashoff;
|
|
int doff;
|
|
unsigned int bias = miGetZeroLineBias(pDrawable->pScreen);
|
|
unsigned int oc1; /* outcode of point 1 */
|
|
unsigned int oc2; /* outcode of point 2 */
|
|
|
|
nBox = REGION_NUM_RECTS (pClip);
|
|
pBox = REGION_RECTS (pClip);
|
|
|
|
bres = fbSelectBres (pDrawable, pGC);
|
|
|
|
CalcLineDeltas(x1, y1, x2, y2, adx, ady, signdx, signdy,
|
|
1, 1, octant);
|
|
|
|
if (adx > ady)
|
|
{
|
|
axis = X_AXIS;
|
|
e1 = ady << 1;
|
|
e2 = e1 - (adx << 1);
|
|
e = e1 - adx;
|
|
len = adx;
|
|
}
|
|
else
|
|
{
|
|
axis = Y_AXIS;
|
|
e1 = adx << 1;
|
|
e2 = e1 - (ady << 1);
|
|
e = e1 - ady;
|
|
SetYMajorOctant(octant);
|
|
len = ady;
|
|
}
|
|
|
|
FIXUP_ERROR (e, octant, bias);
|
|
|
|
/*
|
|
* Adjust error terms to compare against zero
|
|
*/
|
|
e3 = e2 - e1;
|
|
e = e - e1;
|
|
|
|
/* we have bresenham parameters and two points.
|
|
all we have to do now is clip and draw.
|
|
*/
|
|
|
|
if (drawLast)
|
|
len++;
|
|
dashoff = *dashOffset;
|
|
*dashOffset = dashoff + len;
|
|
while(nBox--)
|
|
{
|
|
oc1 = 0;
|
|
oc2 = 0;
|
|
OUTCODES(oc1, x1, y1, pBox);
|
|
OUTCODES(oc2, x2, y2, pBox);
|
|
if ((oc1 | oc2) == 0)
|
|
{
|
|
(*bres) (pDrawable, pGC, dashoff,
|
|
signdx, signdy, axis, x1, y1,
|
|
e, e1, e3, len);
|
|
break;
|
|
}
|
|
else if (oc1 & oc2)
|
|
{
|
|
pBox++;
|
|
}
|
|
else
|
|
{
|
|
int new_x1 = x1, new_y1 = y1, new_x2 = x2, new_y2 = y2;
|
|
int clip1 = 0, clip2 = 0;
|
|
int clipdx, clipdy;
|
|
int err;
|
|
|
|
if (miZeroClipLine(pBox->x1, pBox->y1, pBox->x2-1,
|
|
pBox->y2-1,
|
|
&new_x1, &new_y1, &new_x2, &new_y2,
|
|
adx, ady, &clip1, &clip2,
|
|
octant, bias, oc1, oc2) == -1)
|
|
{
|
|
pBox++;
|
|
continue;
|
|
}
|
|
|
|
if (axis == X_AXIS)
|
|
len = abs(new_x2 - new_x1);
|
|
else
|
|
len = abs(new_y2 - new_y1);
|
|
if (clip2 != 0 || drawLast)
|
|
len++;
|
|
if (len)
|
|
{
|
|
/* unwind bresenham error term to first point */
|
|
doff = dashoff;
|
|
err = e;
|
|
if (clip1)
|
|
{
|
|
clipdx = abs(new_x1 - x1);
|
|
clipdy = abs(new_y1 - y1);
|
|
if (axis == X_AXIS)
|
|
{
|
|
doff += clipdx;
|
|
err += e3 * clipdy + e1 * clipdx;
|
|
}
|
|
else
|
|
{
|
|
doff += clipdy;
|
|
err += e3 * clipdx + e1 * clipdy;
|
|
}
|
|
}
|
|
(*bres) (pDrawable, pGC, doff,
|
|
signdx, signdy, axis, new_x1, new_y1,
|
|
err, e1, e3, len);
|
|
}
|
|
pBox++;
|
|
}
|
|
} /* while (nBox--) */
|
|
}
|