xserver-multidpi/mi/mifpolycon.c

281 lines
8.2 KiB
C
Raw Normal View History

2003-11-14 16:54:54 +01:00
/***********************************************************
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.
******************************************************************/
#ifdef HAVE_DIX_CONFIG_H
#include <dix-config.h>
#endif
2003-11-14 16:54:54 +01:00
#include <math.h>
#include <X11/X.h>
2003-11-14 16:54:54 +01:00
#include "gcstruct.h"
#include "windowstr.h"
#include "pixmapstr.h"
#include "mifpoly.h"
2007-03-09 04:46:23 +01:00
static int GetFPolyYBounds(SppPointPtr pts, int n, double yFtrans,
2003-11-14 17:49:22 +01:00
int *by, int *ty);
2003-11-14 16:54:54 +01:00
/*
* Written by Todd Newman; April. 1987.
*
* Fill a convex polygon. If the given polygon
* is not convex, then the result is undefined.
* The algorithm is to order the edges from smallest
* y to largest by partitioning the array into a left
* edge list and a right edge list. The algorithm used
* to traverse each edge is digital differencing analyzer
* line algorithm with y as the major axis. There's some funny linear
* interpolation involved because of the subpixel postioning.
*/
Export symbols defined in the sdk. 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()
2008-11-30 02:56:06 +01:00
_X_EXPORT void
2008-05-28 04:57:07 +02:00
miFillSppPoly(
DrawablePtr dst,
GCPtr pgc,
int count, /* number of points */
SppPointPtr ptsIn, /* the points */
int xTrans, int yTrans, /* Translate each point by this */
double xFtrans,
double yFtrans /* translate before conversion
by this amount. This provides
2003-11-14 16:54:54 +01:00
a mechanism to match rounding
errors with any shape that must
meet the polygon exactly.
*/
2008-05-28 04:57:07 +02:00
)
2003-11-14 16:54:54 +01:00
{
2003-11-14 17:49:22 +01:00
double xl = 0.0, xr = 0.0, /* x vals of left and right edges */
ml = 0.0, /* left edge slope */
mr = 0.0, /* right edge slope */
2003-11-14 16:54:54 +01:00
dy, /* delta y */
i; /* loop counter */
int y, /* current scanline */
j,
imin, /* index of vertex with smallest y */
ymin, /* y-extents of polygon */
ymax,
*width,
*FirstWidth, /* output buffer */
*Marked; /* set if this vertex has been used */
2007-03-09 04:46:23 +01:00
int left, right, /* indices to first endpoints */
2003-11-14 16:54:54 +01:00
nextleft,
nextright; /* indices to second endpoints */
DDXPointPtr ptsOut,
FirstPoint; /* output buffer */
if (pgc->miTranslate)
{
xTrans += dst->x;
yTrans += dst->y;
}
imin = GetFPolyYBounds(ptsIn, count, yFtrans, &ymin, &ymax);
y = ymax - ymin + 1;
if ((count < 3) || (y <= 0))
return;
ptsOut = FirstPoint = (DDXPointPtr)xalloc(sizeof(DDXPointRec) * y);
width = FirstWidth = (int *) xalloc(sizeof(int) * y);
Marked = (int *) xalloc(sizeof(int) * count);
2003-11-14 16:54:54 +01:00
if(!ptsOut || !width || !Marked)
{
if (Marked) xfree(Marked);
if (width) xfree(width);
if (ptsOut) xfree(ptsOut);
2003-11-14 16:54:54 +01:00
return;
}
for(j = 0; j < count; j++)
Marked[j] = 0;
nextleft = nextright = imin;
Marked[imin] = -1;
y = ICEIL(ptsIn[nextleft].y + yFtrans);
/*
* loop through all edges of the polygon
*/
do
{
/* add a left edge if we need to */
if ((y > (ptsIn[nextleft].y + yFtrans) ||
ISEQUAL(y, ptsIn[nextleft].y + yFtrans)) &&
Marked[nextleft] != 1)
{
Marked[nextleft]++;
left = nextleft++;
/* find the next edge, considering the end conditions */
if (nextleft >= count)
nextleft = 0;
/* now compute the starting point and slope */
dy = ptsIn[nextleft].y - ptsIn[left].y;
if (dy != 0.0)
{
ml = (ptsIn[nextleft].x - ptsIn[left].x) / dy;
dy = y - (ptsIn[left].y + yFtrans);
xl = (ptsIn[left].x + xFtrans) + ml * max(dy, 0);
}
}
/* add a right edge if we need to */
if ((y > ptsIn[nextright].y + yFtrans) ||
2003-11-14 17:49:22 +01:00
(ISEQUAL(y, ptsIn[nextright].y + yFtrans)
&& Marked[nextright] != 1))
2003-11-14 16:54:54 +01:00
{
Marked[nextright]++;
right = nextright--;
/* find the next edge, considering the end conditions */
if (nextright < 0)
nextright = count - 1;
/* now compute the starting point and slope */
dy = ptsIn[nextright].y - ptsIn[right].y;
if (dy != 0.0)
{
mr = (ptsIn[nextright].x - ptsIn[right].x) / dy;
dy = y - (ptsIn[right].y + yFtrans);
xr = (ptsIn[right].x + xFtrans) + mr * max(dy, 0);
}
}
/*
* generate scans to fill while we still have
* a right edge as well as a left edge.
*/
i = (min(ptsIn[nextleft].y, ptsIn[nextright].y) + yFtrans) - y;
if (i < EPSILON)
{
if(Marked[nextleft] && Marked[nextright])
{
/* Arrgh, we're trapped! (no more points)
* Out, we've got to get out of here before this decadence saps
* our will completely! */
break;
}
continue;
}
else
{
j = (int) i;
if(!j)
j++;
}
while (j > 0)
{
int cxl, cxr;
ptsOut->y = (y) + yTrans;
cxl = ICEIL(xl);
cxr = ICEIL(xr);
/* reverse the edges if necessary */
if (xl < xr)
{
*(width++) = cxr - cxl;
(ptsOut++)->x = cxl + xTrans;
}
else
{
*(width++) = cxl - cxr;
(ptsOut++)->x = cxr + xTrans;
}
y++;
/* increment down the edges */
xl += ml;
xr += mr;
j--;
}
} while (y <= ymax);
/* Finally, fill the spans we've collected */
(*pgc->ops->FillSpans)(dst, pgc,
ptsOut-FirstPoint, FirstPoint, FirstWidth, 1);
xfree(Marked);
xfree(FirstWidth);
xfree(FirstPoint);
2003-11-14 16:54:54 +01:00
}
/* Find the index of the point with the smallest y.also return the
* smallest and largest y */
static
int
2003-11-14 17:49:22 +01:00
GetFPolyYBounds(
2007-03-09 04:46:23 +01:00
SppPointPtr pts,
2003-11-14 17:49:22 +01:00
int n,
double yFtrans,
int *by,
int *ty)
2003-11-14 16:54:54 +01:00
{
2007-03-09 04:46:23 +01:00
SppPointPtr ptMin;
2003-11-14 16:54:54 +01:00
double ymin, ymax;
SppPointPtr ptsStart = pts;
ptMin = pts;
ymin = ymax = (pts++)->y;
while (--n > 0) {
if (pts->y < ymin)
{
ptMin = pts;
ymin = pts->y;
}
if(pts->y > ymax)
ymax = pts->y;
pts++;
}
*by = ICEIL(ymin + yFtrans);
*ty = ICEIL(ymax + yFtrans - 1);
return(ptMin-ptsStart);
}