1 files changed, 137 insertions, 0 deletions
diff --git a/mi/mizerarc.h b/mi/mizerarc.h
new file mode 100644
index 000000000..68c8ce3de
--- /dev/null
+++ b/mi/mizerarc.h
@@ -0,0 +1,137 @@
+/************************************************************
+
+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.
+
+********************************************************/
+
+/* $Xorg: mizerarc.h,v 1.4 2001/02/09 02:05:22 xorgcvs Exp $ */
+
+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(
+#if NeedFunctionPrototypes
+    xArc * /*arc*/,
+    miZeroArcRec * /*info*/,
+    Bool /*ok360*/
+#endif
+);
+
+extern DDXPointPtr miZeroArcPts(
+#if NeedFunctionPrototypes
+    xArc * /*arc*/,
+    DDXPointPtr /*pts*/
+#endif
+);
+