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a09e091a JB |
1 | /************************************************************ |
2 | ||
3 | Copyright 1989, 1998 The Open Group | |
4 | ||
5 | Permission to use, copy, modify, distribute, and sell this software and its | |
6 | documentation for any purpose is hereby granted without fee, provided that | |
7 | the above copyright notice appear in all copies and that both that | |
8 | copyright notice and this permission notice appear in supporting | |
9 | documentation. | |
10 | ||
11 | The above copyright notice and this permission notice shall be included in | |
12 | all copies or substantial portions of the Software. | |
13 | ||
14 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
15 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
16 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
17 | OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN | |
18 | AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
19 | CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
20 | ||
21 | Except as contained in this notice, the name of The Open Group shall not be | |
22 | used in advertising or otherwise to promote the sale, use or other dealings | |
23 | in this Software without prior written authorization from The Open Group. | |
24 | ||
25 | ********************************************************/ | |
26 | ||
27 | typedef struct { | |
28 | int x; | |
29 | int y; | |
30 | int mask; | |
31 | } miZeroArcPtRec; | |
32 | ||
33 | typedef struct { | |
34 | int x, y, k1, k3, a, b, d, dx, dy; | |
35 | int alpha, beta; | |
36 | int xorg, yorg; | |
37 | int xorgo, yorgo; | |
38 | int w, h; | |
39 | int initialMask; | |
40 | miZeroArcPtRec start, altstart, end, altend; | |
41 | int firstx, firsty; | |
42 | int startAngle, endAngle; | |
43 | } miZeroArcRec; | |
44 | ||
45 | #define miCanZeroArc(arc) (((arc)->width == (arc)->height) || \ | |
46 | (((arc)->width <= 800) && ((arc)->height <= 800))) | |
47 | ||
48 | #define MIARCSETUP() \ | |
49 | x = info.x; \ | |
50 | y = info.y; \ | |
51 | k1 = info.k1; \ | |
52 | k3 = info.k3; \ | |
53 | a = info.a; \ | |
54 | b = info.b; \ | |
55 | d = info.d; \ | |
56 | dx = info.dx; \ | |
57 | dy = info.dy | |
58 | ||
59 | #define MIARCOCTANTSHIFT(clause) \ | |
60 | if (a < 0) \ | |
61 | { \ | |
62 | if (y == info.h) \ | |
63 | { \ | |
64 | d = -1; \ | |
65 | a = b = k1 = 0; \ | |
66 | } \ | |
67 | else \ | |
68 | { \ | |
69 | dx = (k1 << 1) - k3; \ | |
70 | k1 = dx - k1; \ | |
71 | k3 = -k3; \ | |
72 | b = b + a - (k1 >> 1); \ | |
73 | d = b + ((-a) >> 1) - d + (k3 >> 3); \ | |
74 | if (dx < 0) \ | |
75 | a = -((-dx) >> 1) - a; \ | |
76 | else \ | |
77 | a = (dx >> 1) - a; \ | |
78 | dx = 0; \ | |
79 | dy = 1; \ | |
80 | clause \ | |
81 | } \ | |
82 | } | |
83 | ||
84 | #define MIARCSTEP(move1,move2) \ | |
85 | b -= k1; \ | |
86 | if (d < 0) \ | |
87 | { \ | |
88 | x += dx; \ | |
89 | y += dy; \ | |
90 | a += k1; \ | |
91 | d += b; \ | |
92 | move1 \ | |
93 | } \ | |
94 | else \ | |
95 | { \ | |
96 | x++; \ | |
97 | y++; \ | |
98 | a += k3; \ | |
99 | d -= a; \ | |
100 | move2 \ | |
101 | } | |
102 | ||
103 | #define MIARCCIRCLESTEP(clause) \ | |
104 | b -= k1; \ | |
105 | x++; \ | |
106 | if (d < 0) \ | |
107 | { \ | |
108 | a += k1; \ | |
109 | d += b; \ | |
110 | } \ | |
111 | else \ | |
112 | { \ | |
113 | y++; \ | |
114 | a += k3; \ | |
115 | d -= a; \ | |
116 | clause \ | |
117 | } | |
118 | ||
119 | /* mizerarc.c */ | |
120 | ||
121 | extern _X_EXPORT Bool miZeroArcSetup(xArc * /*arc */ , | |
122 | miZeroArcRec * /*info */ , | |
123 | Bool /*ok360 */ | |
124 | ); |