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authormarha <marha@users.sourceforge.net>2012-03-23 10:05:55 +0100
committermarha <marha@users.sourceforge.net>2012-03-23 10:05:55 +0100
commit0f834b91a4768673833ab4917e87d86c237bb1a6 (patch)
tree363489504ed4b2d360259b8de4c9e392918e5d02 /xorg-server/mi/mipolycon.c
parentfc72edebf875378459368c5383d9023730cbca54 (diff)
downloadvcxsrv-0f834b91a4768673833ab4917e87d86c237bb1a6.tar.gz
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libX11 xserver fontconfig mesa pixman xkbcomp xkeyboard-config git update
23 Mar 2012
Diffstat (limited to 'xorg-server/mi/mipolycon.c')
-rw-r--r--xorg-server/mi/mipolycon.c482
1 files changed, 235 insertions, 247 deletions
diff --git a/xorg-server/mi/mipolycon.c b/xorg-server/mi/mipolycon.c
index 7c9b47747..e831633fe 100644
--- a/xorg-server/mi/mipolycon.c
+++ b/xorg-server/mi/mipolycon.c
@@ -1,247 +1,235 @@
-/***********************************************************
-
-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
-
-#include "gcstruct.h"
-#include "pixmap.h"
-#include "mi.h"
-#include "miscanfill.h"
-
-static int getPolyYBounds(DDXPointPtr pts, int n, int *by, int *ty);
-
-/*
- * convexpoly.c
- *
- * Written by Brian Kelleher; Dec. 1985.
- *
- * 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 an extension of Bresenham's
- * line algorithm with y as the major axis.
- * For a derivation of the algorithm, see the author of
- * this code.
- */
-Bool
-miFillConvexPoly(
- DrawablePtr dst,
- GCPtr pgc,
- int count, /* number of points */
- DDXPointPtr ptsIn /* the points */
- )
-{
- int xl = 0, xr = 0; /* x vals of left and right edges */
- int dl = 0, dr = 0; /* decision variables */
- int ml = 0, m1l = 0;/* left edge slope and slope+1 */
- int mr = 0, m1r = 0; /* right edge slope and slope+1 */
- int incr1l = 0, incr2l = 0; /* left edge error increments */
- int incr1r = 0, incr2r = 0; /* right edge error increments */
- int dy; /* delta y */
- int y; /* current scanline */
- int left, right; /* indices to first endpoints */
- int i; /* loop counter */
- int nextleft, nextright; /* indices to second endpoints */
- DDXPointPtr ptsOut, FirstPoint; /* output buffer */
- int *width, *FirstWidth; /* output buffer */
- int imin; /* index of smallest vertex (in y) */
- int ymin; /* y-extents of polygon */
- int ymax;
-
- /*
- * find leftx, bottomy, rightx, topy, and the index
- * of bottomy. Also translate the points.
- */
- imin = getPolyYBounds(ptsIn, count, &ymin, &ymax);
-
- dy = ymax - ymin + 1;
- if ((count < 3) || (dy < 0))
- return TRUE;
- ptsOut = FirstPoint = malloc(sizeof(DDXPointRec)*dy);
- width = FirstWidth = malloc(sizeof(int) * dy);
- if(!FirstPoint || !FirstWidth)
- {
- free(FirstWidth);
- free(FirstPoint);
- return FALSE;
- }
-
- nextleft = nextright = imin;
- y = ptsIn[nextleft].y;
-
- /*
- * loop through all edges of the polygon
- */
- do {
- /*
- * add a left edge if we need to
- */
- if (ptsIn[nextleft].y == y) {
- left = nextleft;
-
- /*
- * find the next edge, considering the end
- * conditions of the array.
- */
- nextleft++;
- if (nextleft >= count)
- nextleft = 0;
-
- /*
- * now compute all of the random information
- * needed to run the iterative algorithm.
- */
- BRESINITPGON(ptsIn[nextleft].y-ptsIn[left].y,
- ptsIn[left].x,ptsIn[nextleft].x,
- xl, dl, ml, m1l, incr1l, incr2l);
- }
-
- /*
- * add a right edge if we need to
- */
- if (ptsIn[nextright].y == y) {
- right = nextright;
-
- /*
- * find the next edge, considering the end
- * conditions of the array.
- */
- nextright--;
- if (nextright < 0)
- nextright = count-1;
-
- /*
- * now compute all of the random information
- * needed to run the iterative algorithm.
- */
- BRESINITPGON(ptsIn[nextright].y-ptsIn[right].y,
- ptsIn[right].x,ptsIn[nextright].x,
- xr, dr, mr, m1r, incr1r, incr2r);
- }
-
- /*
- * 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) - y;
- /* in case we're called with non-convex polygon */
- if(i < 0)
- {
- free(FirstWidth);
- free(FirstPoint);
- return TRUE;
- }
- while (i-- > 0)
- {
- ptsOut->y = y;
-
- /*
- * reverse the edges if necessary
- */
- if (xl < xr)
- {
- *(width++) = xr - xl;
- (ptsOut++)->x = xl;
- }
- else
- {
- *(width++) = xl - xr;
- (ptsOut++)->x = xr;
- }
- y++;
-
- /* increment down the edges */
- BRESINCRPGON(dl, xl, ml, m1l, incr1l, incr2l);
- BRESINCRPGON(dr, xr, mr, m1r, incr1r, incr2r);
- }
- } while (y != ymax);
-
- /*
- * Finally, fill the <remaining> spans
- */
- (*pgc->ops->FillSpans)(dst, pgc,
- ptsOut-FirstPoint,FirstPoint,FirstWidth,
- 1);
- free(FirstWidth);
- free(FirstPoint);
- return TRUE;
-}
-
-
-/*
- * Find the index of the point with the smallest y.
- */
-static int
-getPolyYBounds(DDXPointPtr pts, int n, int *by, int *ty)
-{
- DDXPointPtr ptMin;
- int ymin, ymax;
- DDXPointPtr 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 = ymin;
- *ty = ymax;
- return ptMin-ptsStart;
-}
+/***********************************************************
+
+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
+
+#include "gcstruct.h"
+#include "pixmap.h"
+#include "mi.h"
+#include "miscanfill.h"
+
+static int getPolyYBounds(DDXPointPtr pts, int n, int *by, int *ty);
+
+/*
+ * convexpoly.c
+ *
+ * Written by Brian Kelleher; Dec. 1985.
+ *
+ * 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 an extension of Bresenham's
+ * line algorithm with y as the major axis.
+ * For a derivation of the algorithm, see the author of
+ * this code.
+ */
+Bool
+miFillConvexPoly(DrawablePtr dst, GCPtr pgc, int count, /* number of points */
+ DDXPointPtr ptsIn /* the points */
+ )
+{
+ int xl = 0, xr = 0; /* x vals of left and right edges */
+ int dl = 0, dr = 0; /* decision variables */
+ int ml = 0, m1l = 0; /* left edge slope and slope+1 */
+ int mr = 0, m1r = 0; /* right edge slope and slope+1 */
+ int incr1l = 0, incr2l = 0; /* left edge error increments */
+ int incr1r = 0, incr2r = 0; /* right edge error increments */
+ int dy; /* delta y */
+ int y; /* current scanline */
+ int left, right; /* indices to first endpoints */
+ int i; /* loop counter */
+ int nextleft, nextright; /* indices to second endpoints */
+ DDXPointPtr ptsOut, FirstPoint; /* output buffer */
+ int *width, *FirstWidth; /* output buffer */
+ int imin; /* index of smallest vertex (in y) */
+ int ymin; /* y-extents of polygon */
+ int ymax;
+
+ /*
+ * find leftx, bottomy, rightx, topy, and the index
+ * of bottomy. Also translate the points.
+ */
+ imin = getPolyYBounds(ptsIn, count, &ymin, &ymax);
+
+ dy = ymax - ymin + 1;
+ if ((count < 3) || (dy < 0))
+ return TRUE;
+ ptsOut = FirstPoint = malloc(sizeof(DDXPointRec) * dy);
+ width = FirstWidth = malloc(sizeof(int) * dy);
+ if (!FirstPoint || !FirstWidth) {
+ free(FirstWidth);
+ free(FirstPoint);
+ return FALSE;
+ }
+
+ nextleft = nextright = imin;
+ y = ptsIn[nextleft].y;
+
+ /*
+ * loop through all edges of the polygon
+ */
+ do {
+ /*
+ * add a left edge if we need to
+ */
+ if (ptsIn[nextleft].y == y) {
+ left = nextleft;
+
+ /*
+ * find the next edge, considering the end
+ * conditions of the array.
+ */
+ nextleft++;
+ if (nextleft >= count)
+ nextleft = 0;
+
+ /*
+ * now compute all of the random information
+ * needed to run the iterative algorithm.
+ */
+ BRESINITPGON(ptsIn[nextleft].y - ptsIn[left].y,
+ ptsIn[left].x, ptsIn[nextleft].x,
+ xl, dl, ml, m1l, incr1l, incr2l);
+ }
+
+ /*
+ * add a right edge if we need to
+ */
+ if (ptsIn[nextright].y == y) {
+ right = nextright;
+
+ /*
+ * find the next edge, considering the end
+ * conditions of the array.
+ */
+ nextright--;
+ if (nextright < 0)
+ nextright = count - 1;
+
+ /*
+ * now compute all of the random information
+ * needed to run the iterative algorithm.
+ */
+ BRESINITPGON(ptsIn[nextright].y - ptsIn[right].y,
+ ptsIn[right].x, ptsIn[nextright].x,
+ xr, dr, mr, m1r, incr1r, incr2r);
+ }
+
+ /*
+ * 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) - y;
+ /* in case we're called with non-convex polygon */
+ if (i < 0) {
+ free(FirstWidth);
+ free(FirstPoint);
+ return TRUE;
+ }
+ while (i-- > 0) {
+ ptsOut->y = y;
+
+ /*
+ * reverse the edges if necessary
+ */
+ if (xl < xr) {
+ *(width++) = xr - xl;
+ (ptsOut++)->x = xl;
+ }
+ else {
+ *(width++) = xl - xr;
+ (ptsOut++)->x = xr;
+ }
+ y++;
+
+ /* increment down the edges */
+ BRESINCRPGON(dl, xl, ml, m1l, incr1l, incr2l);
+ BRESINCRPGON(dr, xr, mr, m1r, incr1r, incr2r);
+ }
+ } while (y != ymax);
+
+ /*
+ * Finally, fill the <remaining> spans
+ */
+ (*pgc->ops->FillSpans) (dst, pgc,
+ ptsOut - FirstPoint, FirstPoint, FirstWidth, 1);
+ free(FirstWidth);
+ free(FirstPoint);
+ return TRUE;
+}
+
+/*
+ * Find the index of the point with the smallest y.
+ */
+static int
+getPolyYBounds(DDXPointPtr pts, int n, int *by, int *ty)
+{
+ DDXPointPtr ptMin;
+ int ymin, ymax;
+ DDXPointPtr 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 = ymin;
+ *ty = ymax;
+ return ptMin - ptsStart;
+}