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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 | #ifndef __MIFILLARC_H__ | |
28 | #define __MIFILLARC_H__ | |
29 | ||
30 | #define FULLCIRCLE (360 * 64) | |
31 | ||
32 | typedef struct _miFillArc { | |
33 | int xorg, yorg; | |
34 | int y; | |
35 | int dx, dy; | |
36 | int e; | |
37 | int ym, yk, xm, xk; | |
38 | } miFillArcRec; | |
39 | ||
40 | /* could use 64-bit integers */ | |
41 | typedef struct _miFillArcD { | |
42 | int xorg, yorg; | |
43 | int y; | |
44 | int dx, dy; | |
45 | double e; | |
46 | double ym, yk, xm, xk; | |
47 | } miFillArcDRec; | |
48 | ||
49 | #define miFillArcEmpty(arc) (!(arc)->angle2 || \ | |
50 | !(arc)->width || !(arc)->height || \ | |
51 | (((arc)->width == 1) && ((arc)->height & 1))) | |
52 | ||
53 | #define miCanFillArc(arc) (((arc)->width == (arc)->height) || \ | |
54 | (((arc)->width <= 800) && ((arc)->height <= 800))) | |
55 | ||
56 | #define MIFILLARCSETUP() \ | |
57 | x = 0; \ | |
58 | y = info.y; \ | |
59 | e = info.e; \ | |
60 | xk = info.xk; \ | |
61 | xm = info.xm; \ | |
62 | yk = info.yk; \ | |
63 | ym = info.ym; \ | |
64 | dx = info.dx; \ | |
65 | dy = info.dy; \ | |
66 | xorg = info.xorg; \ | |
67 | yorg = info.yorg | |
68 | ||
69 | #define MIFILLARCSTEP(slw) \ | |
70 | e += yk; \ | |
71 | while (e >= 0) \ | |
72 | { \ | |
73 | x++; \ | |
74 | xk -= xm; \ | |
75 | e += xk; \ | |
76 | } \ | |
77 | y--; \ | |
78 | yk -= ym; \ | |
79 | slw = (x << 1) + dx; \ | |
80 | if ((e == xk) && (slw > 1)) \ | |
81 | slw-- | |
82 | ||
83 | #define MIFILLCIRCSTEP(slw) MIFILLARCSTEP(slw) | |
84 | #define MIFILLELLSTEP(slw) MIFILLARCSTEP(slw) | |
85 | ||
86 | #define miFillArcLower(slw) (((y + dy) != 0) && ((slw > 1) || (e != xk))) | |
87 | ||
88 | typedef struct _miSliceEdge { | |
89 | int x; | |
90 | int stepx; | |
91 | int deltax; | |
92 | int e; | |
93 | int dy; | |
94 | int dx; | |
95 | } miSliceEdgeRec, *miSliceEdgePtr; | |
96 | ||
97 | typedef struct _miArcSlice { | |
98 | miSliceEdgeRec edge1, edge2; | |
99 | int min_top_y, max_top_y; | |
100 | int min_bot_y, max_bot_y; | |
101 | Bool edge1_top, edge2_top; | |
102 | Bool flip_top, flip_bot; | |
103 | } miArcSliceRec; | |
104 | ||
105 | #define MIARCSLICESTEP(edge) \ | |
106 | edge.x -= edge.stepx; \ | |
107 | edge.e -= edge.dx; \ | |
108 | if (edge.e <= 0) \ | |
109 | { \ | |
110 | edge.x -= edge.deltax; \ | |
111 | edge.e += edge.dy; \ | |
112 | } | |
113 | ||
114 | #define miFillSliceUpper(slice) \ | |
115 | ((y >= slice.min_top_y) && (y <= slice.max_top_y)) | |
116 | ||
117 | #define miFillSliceLower(slice) \ | |
118 | ((y >= slice.min_bot_y) && (y <= slice.max_bot_y)) | |
119 | ||
120 | #define MIARCSLICEUPPER(xl,xr,slice,slw) \ | |
121 | xl = xorg - x; \ | |
122 | xr = xl + slw - 1; \ | |
123 | if (slice.edge1_top && (slice.edge1.x < xr)) \ | |
124 | xr = slice.edge1.x; \ | |
125 | if (slice.edge2_top && (slice.edge2.x > xl)) \ | |
126 | xl = slice.edge2.x; | |
127 | ||
128 | #define MIARCSLICELOWER(xl,xr,slice,slw) \ | |
129 | xl = xorg - x; \ | |
130 | xr = xl + slw - 1; \ | |
131 | if (!slice.edge1_top && (slice.edge1.x > xl)) \ | |
132 | xl = slice.edge1.x; \ | |
133 | if (!slice.edge2_top && (slice.edge2.x < xr)) \ | |
134 | xr = slice.edge2.x; | |
135 | ||
136 | #define MIWIDEARCSETUP(x,y,dy,slw,e,xk,xm,yk,ym) \ | |
137 | x = 0; \ | |
138 | y = slw >> 1; \ | |
139 | yk = y << 3; \ | |
140 | xm = 8; \ | |
141 | ym = 8; \ | |
142 | if (dy) \ | |
143 | { \ | |
144 | xk = 0; \ | |
145 | if (slw & 1) \ | |
146 | e = -1; \ | |
147 | else \ | |
148 | e = -(y << 2) - 2; \ | |
149 | } \ | |
150 | else \ | |
151 | { \ | |
152 | y++; \ | |
153 | yk += 4; \ | |
154 | xk = -4; \ | |
155 | if (slw & 1) \ | |
156 | e = -(y << 2) - 3; \ | |
157 | else \ | |
158 | e = - (y << 3); \ | |
159 | } | |
160 | ||
161 | #define MIFILLINARCSTEP(slw) \ | |
162 | ine += inyk; \ | |
163 | while (ine >= 0) \ | |
164 | { \ | |
165 | inx++; \ | |
166 | inxk -= inxm; \ | |
167 | ine += inxk; \ | |
168 | } \ | |
169 | iny--; \ | |
170 | inyk -= inym; \ | |
171 | slw = (inx << 1) + dx; \ | |
172 | if ((ine == inxk) && (slw > 1)) \ | |
173 | slw-- | |
174 | ||
175 | #define miFillInArcLower(slw) (((iny + dy) != 0) && \ | |
176 | ((slw > 1) || (ine != inxk))) | |
177 | ||
178 | extern _X_EXPORT void miFillArcSetup(xArc * /*arc */ , | |
179 | miFillArcRec * /*info */ | |
180 | ); | |
181 | ||
182 | extern _X_EXPORT void miFillArcSliceSetup(xArc * /*arc */ , | |
183 | miArcSliceRec * /*slice */ , | |
184 | GCPtr /*pGC */ | |
185 | ); | |
186 | ||
187 | #endif /* __MIFILLARC_H__ */ |