gtk/gdk/linux-fb/mipolygen.c

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2000-05-31 21:50:38 +00:00
/***********************************************************
Copyright 1987, 1998 The Open Group
All Rights Reserved.
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.
******************************************************************/
/* $TOG: mipolygen.c /main/9 1998/02/09 14:47:51 kaleb $ */
#include "mi.h"
#include "mipoly.h"
/*
*
* Written by Brian Kelleher; Oct. 1985
*
* Routine to fill a polygon. Two fill rules are
* supported: frWINDING and frEVENODD.
*
* See fillpoly.h for a complete description of the algorithm.
*/
gboolean
miFillGeneralPoly(dst, pgc, count, ptsIn)
GdkDrawable* dst;
GdkGC* pgc;
int count; /* number of points */
GdkPoint* ptsIn; /* the points */
{
register EdgeTableEntry *pAET; /* the Active Edge Table */
register int y; /* the current scanline */
register int nPts = 0; /* number of pts in buffer */
register EdgeTableEntry *pWETE; /* Winding Edge Table */
register ScanLineList *pSLL; /* Current ScanLineList */
i2000-11-22 Alexander Larsson <alexl@redhat.com> * gdk/gdktypes.h: Add new type GdkSpan * docs/reference/gdk/gdk-sections.txt, docs/reference/gdk/tmpl/regions.sgml, gdk/gdkregion-generic.c, gdk/gdkregion.h: Implement and document gdk_region_spans_intersect_foreach. * gdk/linux-fb/Makefile.am, gdk/linux-fb/gdkrender-fb.c: Add new file gdkrender-fb.c which contains all core rendering code. Add gdk_fb_fill_rectangle_generic (old rectangle code) and gdk_fb_fill_rectangle_simple_16, gdk_fb_fill_rectangle_simple_32 (optimized rectangle fillers). * gdk/linux-fb/gdkdrawable-fb2.c: Move all rendering code to gdkrender-fb.c. Change from using GdkRectangles and GdkSegments for spans to GdkSpan. Use the new span intersection functions in gdk_fb_fill_spans. gdk_fb_draw_rectangle() clips filled rectangles and calls gc->fill_rectangle with the result. gdk_fb_fill_spans() gets extra argument "sorted". * gdk/linux-fb/gdkevents-fb.c: Remove unused includes and defines. New function gdk_fb_get_time() to get correct time for events. * gdk/linux-fb/gdkinput-ps2.c: Use gdk method of generating multiple-clicks (gdk_event_button_generate) Make sure to set the time of all events. * gdk/linux-fb/gdkmain-fb.c: Use gdk_fb_get_time (). * gdk/linux-fb/gdkprivate-fb.h: New virtual GC calls: fill_span & fill_rectangle. Export gdk_fb_get_time(). gdk_fb_fill_spans() gets extra argument "sorted". * gdk/linux-fb/mi*.c: Use GdkSpan instead of GdkRectangle. Pass correct sorted to gdk_fb_fill_spans. (sorted value taken from XFree 4 source)
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register GdkSpan* ptsOut; /* ptr to output buffers */
GdkSpan FirstPoint[NUMPTSTOBUFFER]; /* the output buffers */
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EdgeTableEntry *pPrevAET; /* previous AET entry */
EdgeTable ET; /* Edge Table header node */
EdgeTableEntry AET; /* Active ET header node */
EdgeTableEntry *pETEs; /* Edge Table Entries buff */
ScanLineListBlock SLLBlock; /* header for ScanLineList */
int fixWAET = 0;
if (count < 3)
return(TRUE);
if(!(pETEs = (EdgeTableEntry *)
ALLOCATE_LOCAL(sizeof(EdgeTableEntry) * count)))
return(FALSE);
ptsOut = FirstPoint;
if (!miCreateETandAET(count, ptsIn, &ET, &AET, pETEs, &SLLBlock))
{
DEALLOCATE_LOCAL(pETEs);
return(FALSE);
}
pSLL = ET.scanlines.next;
if (0 /* pgc->fillRule == EvenOddRule */)
{
/*
* for each scanline
*/
for (y = ET.ymin; y < ET.ymax; y++)
{
/*
* Add a new edge to the active edge table when we
* get to the next edge.
*/
if (pSLL && y == pSLL->scanline)
{
miloadAET(&AET, pSLL->edgelist);
pSLL = pSLL->next;
}
pPrevAET = &AET;
pAET = AET.next;
/*
* for each active edge
*/
while (pAET)
{
ptsOut->x = pAET->bres.minor;
ptsOut->width = pAET->next->bres.minor - pAET->bres.minor;
ptsOut++->y = y;
nPts++;
/*
* send out the buffer when its full
*/
if (nPts == NUMPTSTOBUFFER)
{
i2000-11-22 Alexander Larsson <alexl@redhat.com> * gdk/gdktypes.h: Add new type GdkSpan * docs/reference/gdk/gdk-sections.txt, docs/reference/gdk/tmpl/regions.sgml, gdk/gdkregion-generic.c, gdk/gdkregion.h: Implement and document gdk_region_spans_intersect_foreach. * gdk/linux-fb/Makefile.am, gdk/linux-fb/gdkrender-fb.c: Add new file gdkrender-fb.c which contains all core rendering code. Add gdk_fb_fill_rectangle_generic (old rectangle code) and gdk_fb_fill_rectangle_simple_16, gdk_fb_fill_rectangle_simple_32 (optimized rectangle fillers). * gdk/linux-fb/gdkdrawable-fb2.c: Move all rendering code to gdkrender-fb.c. Change from using GdkRectangles and GdkSegments for spans to GdkSpan. Use the new span intersection functions in gdk_fb_fill_spans. gdk_fb_draw_rectangle() clips filled rectangles and calls gc->fill_rectangle with the result. gdk_fb_fill_spans() gets extra argument "sorted". * gdk/linux-fb/gdkevents-fb.c: Remove unused includes and defines. New function gdk_fb_get_time() to get correct time for events. * gdk/linux-fb/gdkinput-ps2.c: Use gdk method of generating multiple-clicks (gdk_event_button_generate) Make sure to set the time of all events. * gdk/linux-fb/gdkmain-fb.c: Use gdk_fb_get_time (). * gdk/linux-fb/gdkprivate-fb.h: New virtual GC calls: fill_span & fill_rectangle. Export gdk_fb_get_time(). gdk_fb_fill_spans() gets extra argument "sorted". * gdk/linux-fb/mi*.c: Use GdkSpan instead of GdkRectangle. Pass correct sorted to gdk_fb_fill_spans. (sorted value taken from XFree 4 source)
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gdk_fb_fill_spans(dst, pgc, FirstPoint, nPts, TRUE);
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ptsOut = FirstPoint;
nPts = 0;
}
EVALUATEEDGEEVENODD(pAET, pPrevAET, y)
EVALUATEEDGEEVENODD(pAET, pPrevAET, y);
}
miInsertionSort(&AET);
}
}
else /* default to WindingNumber */
{
/*
* for each scanline
*/
for (y = ET.ymin; y < ET.ymax; y++)
{
/*
* Add a new edge to the active edge table when we
* get to the next edge.
*/
if (pSLL && y == pSLL->scanline)
{
miloadAET(&AET, pSLL->edgelist);
micomputeWAET(&AET);
pSLL = pSLL->next;
}
pPrevAET = &AET;
pAET = AET.next;
pWETE = pAET;
/*
* for each active edge
*/
while (pAET)
{
/*
* if the next edge in the active edge table is
* also the next edge in the winding active edge
* table.
*/
if (pWETE == pAET)
{
ptsOut->x = pAET->bres.minor;
ptsOut->width = pAET->nextWETE->bres.minor - pAET->bres.minor;
ptsOut++->y = y;
nPts++;
/*
* send out the buffer
*/
if (nPts == NUMPTSTOBUFFER)
{
i2000-11-22 Alexander Larsson <alexl@redhat.com> * gdk/gdktypes.h: Add new type GdkSpan * docs/reference/gdk/gdk-sections.txt, docs/reference/gdk/tmpl/regions.sgml, gdk/gdkregion-generic.c, gdk/gdkregion.h: Implement and document gdk_region_spans_intersect_foreach. * gdk/linux-fb/Makefile.am, gdk/linux-fb/gdkrender-fb.c: Add new file gdkrender-fb.c which contains all core rendering code. Add gdk_fb_fill_rectangle_generic (old rectangle code) and gdk_fb_fill_rectangle_simple_16, gdk_fb_fill_rectangle_simple_32 (optimized rectangle fillers). * gdk/linux-fb/gdkdrawable-fb2.c: Move all rendering code to gdkrender-fb.c. Change from using GdkRectangles and GdkSegments for spans to GdkSpan. Use the new span intersection functions in gdk_fb_fill_spans. gdk_fb_draw_rectangle() clips filled rectangles and calls gc->fill_rectangle with the result. gdk_fb_fill_spans() gets extra argument "sorted". * gdk/linux-fb/gdkevents-fb.c: Remove unused includes and defines. New function gdk_fb_get_time() to get correct time for events. * gdk/linux-fb/gdkinput-ps2.c: Use gdk method of generating multiple-clicks (gdk_event_button_generate) Make sure to set the time of all events. * gdk/linux-fb/gdkmain-fb.c: Use gdk_fb_get_time (). * gdk/linux-fb/gdkprivate-fb.h: New virtual GC calls: fill_span & fill_rectangle. Export gdk_fb_get_time(). gdk_fb_fill_spans() gets extra argument "sorted". * gdk/linux-fb/mi*.c: Use GdkSpan instead of GdkRectangle. Pass correct sorted to gdk_fb_fill_spans. (sorted value taken from XFree 4 source)
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gdk_fb_fill_spans(dst, pgc, FirstPoint, nPts, TRUE);
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ptsOut = FirstPoint;
nPts = 0;
}
pWETE = pWETE->nextWETE;
while (pWETE != pAET)
EVALUATEEDGEWINDING(pAET, pPrevAET, y, fixWAET);
pWETE = pWETE->nextWETE;
}
EVALUATEEDGEWINDING(pAET, pPrevAET, y, fixWAET);
}
/*
* reevaluate the Winding active edge table if we
* just had to resort it or if we just exited an edge.
*/
if (miInsertionSort(&AET) || fixWAET)
{
micomputeWAET(&AET);
fixWAET = 0;
}
}
}
/*
* Get any spans that we missed by buffering
*/
if(nPts > 0)
i2000-11-22 Alexander Larsson <alexl@redhat.com> * gdk/gdktypes.h: Add new type GdkSpan * docs/reference/gdk/gdk-sections.txt, docs/reference/gdk/tmpl/regions.sgml, gdk/gdkregion-generic.c, gdk/gdkregion.h: Implement and document gdk_region_spans_intersect_foreach. * gdk/linux-fb/Makefile.am, gdk/linux-fb/gdkrender-fb.c: Add new file gdkrender-fb.c which contains all core rendering code. Add gdk_fb_fill_rectangle_generic (old rectangle code) and gdk_fb_fill_rectangle_simple_16, gdk_fb_fill_rectangle_simple_32 (optimized rectangle fillers). * gdk/linux-fb/gdkdrawable-fb2.c: Move all rendering code to gdkrender-fb.c. Change from using GdkRectangles and GdkSegments for spans to GdkSpan. Use the new span intersection functions in gdk_fb_fill_spans. gdk_fb_draw_rectangle() clips filled rectangles and calls gc->fill_rectangle with the result. gdk_fb_fill_spans() gets extra argument "sorted". * gdk/linux-fb/gdkevents-fb.c: Remove unused includes and defines. New function gdk_fb_get_time() to get correct time for events. * gdk/linux-fb/gdkinput-ps2.c: Use gdk method of generating multiple-clicks (gdk_event_button_generate) Make sure to set the time of all events. * gdk/linux-fb/gdkmain-fb.c: Use gdk_fb_get_time (). * gdk/linux-fb/gdkprivate-fb.h: New virtual GC calls: fill_span & fill_rectangle. Export gdk_fb_get_time(). gdk_fb_fill_spans() gets extra argument "sorted". * gdk/linux-fb/mi*.c: Use GdkSpan instead of GdkRectangle. Pass correct sorted to gdk_fb_fill_spans. (sorted value taken from XFree 4 source)
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gdk_fb_fill_spans(dst, pgc, FirstPoint, nPts, TRUE);
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DEALLOCATE_LOCAL(pETEs);
miFreeStorage(SLLBlock.next);
return(TRUE);
}