127 lines
2.8 KiB
C
127 lines
2.8 KiB
C
/************************************************************
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Copyright 1989, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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********************************************************/
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typedef struct {
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int x;
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int y;
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int mask;
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} miZeroArcPtRec;
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typedef struct {
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int x, y, k1, k3, a, b, d, dx, dy;
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int alpha, beta;
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int xorg, yorg;
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int xorgo, yorgo;
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int w, h;
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int initialMask;
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miZeroArcPtRec start, altstart, end, altend;
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int firstx, firsty;
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int startAngle, endAngle;
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} miZeroArcRec;
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#define miCanZeroArc(arc) (((arc)->width == (arc)->height) || \
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(((arc)->width <= 800) && ((arc)->height <= 800)))
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#define MIARCSETUP() \
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x = info.x; \
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y = info.y; \
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k1 = info.k1; \
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k3 = info.k3; \
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a = info.a; \
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b = info.b; \
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d = info.d; \
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dx = info.dx; \
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dy = info.dy
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#define MIARCOCTANTSHIFT(clause) \
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if (a < 0) \
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{ \
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if (y == info.h) \
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{ \
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d = -1; \
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a = b = k1 = 0; \
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} \
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else \
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{ \
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dx = (k1 << 1) - k3; \
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k1 = dx - k1; \
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k3 = -k3; \
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b = b + a - (k1 >> 1); \
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d = b + ((-a) >> 1) - d + (k3 >> 3); \
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if (dx < 0) \
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a = -((-dx) >> 1) - a; \
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else \
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a = (dx >> 1) - a; \
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dx = 0; \
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dy = 1; \
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clause \
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} \
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}
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#define MIARCSTEP(move1,move2) \
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b -= k1; \
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if (d < 0) \
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{ \
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x += dx; \
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y += dy; \
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a += k1; \
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d += b; \
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move1 \
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} \
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else \
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{ \
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x++; \
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y++; \
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a += k3; \
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d -= a; \
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move2 \
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}
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#define MIARCCIRCLESTEP(clause) \
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b -= k1; \
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x++; \
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if (d < 0) \
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{ \
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a += k1; \
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d += b; \
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} \
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else \
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{ \
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y++; \
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a += k3; \
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d -= a; \
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clause \
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}
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/* mizerarc.c */
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extern Bool miZeroArcSetup(
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xArc * /*arc*/,
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miZeroArcRec * /*info*/,
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Bool /*ok360*/
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);
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