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+/************************************************************
+
+Copyright 1989, 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.
+
+********************************************************/
+
+
+typedef struct {
+ int x;
+ int y;
+ int mask;
+} miZeroArcPtRec;
+
+typedef struct {
+ int x, y, k1, k3, a, b, d, dx, dy;
+ int alpha, beta;
+ int xorg, yorg;
+ int xorgo, yorgo;
+ int w, h;
+ int initialMask;
+ miZeroArcPtRec start, altstart, end, altend;
+ int firstx, firsty;
+ int startAngle, endAngle;
+} miZeroArcRec;
+
+#define miCanZeroArc(arc) (((arc)->width == (arc)->height) || \
+ (((arc)->width <= 800) && ((arc)->height <= 800)))
+
+#define MIARCSETUP() \
+ x = info.x; \
+ y = info.y; \
+ k1 = info.k1; \
+ k3 = info.k3; \
+ a = info.a; \
+ b = info.b; \
+ d = info.d; \
+ dx = info.dx; \
+ dy = info.dy
+
+#define MIARCOCTANTSHIFT(clause) \
+ if (a < 0) \
+ { \
+ if (y == info.h) \
+ { \
+ d = -1; \
+ a = b = k1 = 0; \
+ } \
+ else \
+ { \
+ dx = (k1 << 1) - k3; \
+ k1 = dx - k1; \
+ k3 = -k3; \
+ b = b + a - (k1 >> 1); \
+ d = b + ((-a) >> 1) - d + (k3 >> 3); \
+ if (dx < 0) \
+ a = -((-dx) >> 1) - a; \
+ else \
+ a = (dx >> 1) - a; \
+ dx = 0; \
+ dy = 1; \
+ clause \
+ } \
+ }
+
+#define MIARCSTEP(move1,move2) \
+ b -= k1; \
+ if (d < 0) \
+ { \
+ x += dx; \
+ y += dy; \
+ a += k1; \
+ d += b; \
+ move1 \
+ } \
+ else \
+ { \
+ x++; \
+ y++; \
+ a += k3; \
+ d -= a; \
+ move2 \
+ }
+
+#define MIARCCIRCLESTEP(clause) \
+ b -= k1; \
+ x++; \
+ if (d < 0) \
+ { \
+ a += k1; \
+ d += b; \
+ } \
+ else \
+ { \
+ y++; \
+ a += k3; \
+ d -= a; \
+ clause \
+ }
+
+/* mizerarc.c */
+
+extern Bool miZeroArcSetup(
+ xArc * /*arc*/,
+ miZeroArcRec * /*info*/,
+ Bool /*ok360*/
+);