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ef416fc2 | 1 | /* |
f7faf1f5 | 2 | * "$Id: hpgl-polygon.c 4494 2005-02-18 02:18:11Z mike $" |
ef416fc2 | 3 | * |
4 | * HP-GL/2 polygon routines for the Common UNIX Printing System (CUPS). | |
5 | * | |
6 | * Copyright 1993-2005 by Easy Software Products. | |
7 | * | |
8 | * These coded instructions, statements, and computer programs are the | |
9 | * property of Easy Software Products and are protected by Federal | |
10 | * copyright law. Distribution and use rights are outlined in the file | |
11 | * "LICENSE.txt" which should have been included with this file. If this | |
12 | * file is missing or damaged please contact Easy Software Products | |
13 | * at: | |
14 | * | |
15 | * Attn: CUPS Licensing Information | |
16 | * Easy Software Products | |
17 | * 44141 Airport View Drive, Suite 204 | |
18 | * Hollywood, Maryland 20636 USA | |
19 | * | |
20 | * Voice: (301) 373-9600 | |
21 | * EMail: cups-info@cups.org | |
22 | * WWW: http://www.cups.org | |
23 | * | |
24 | * This file is subject to the Apple OS-Developed Software exception. | |
25 | * | |
26 | * Contents: | |
27 | * | |
28 | * EA_edge_rect_absolute() - Draw a rectangle. | |
29 | * EP_edge_polygon() - Stroke the edges of a polygon. | |
30 | * ER_edge_rect_relative() - Draw a rectangle relative to the current | |
31 | * EW_edge_wedge() - Draw a pie wedge. | |
32 | * FP_fill_polygon() - Fill a polygon. | |
33 | * PM_polygon_mode() - Set the polygon drawing mode. | |
34 | * RA_fill_rect_absolute() - Fill a rectangle. | |
35 | * RR_fill_rect_relative() - Fill a rectangle relative to the current | |
36 | * WG_fill_wedge() - Fill a pie wedge. | |
37 | */ | |
38 | ||
39 | /* | |
40 | * Include necessary headers... | |
41 | */ | |
42 | ||
43 | #include "hpgltops.h" | |
44 | ||
45 | ||
46 | /* | |
47 | * 'EA_edge_rect_absolute()' - Draw a rectangle. | |
48 | */ | |
49 | ||
50 | void | |
51 | EA_edge_rect_absolute(int num_params, /* I - Number of parameters */ | |
52 | param_t *params) /* I - Parameters */ | |
53 | { | |
54 | float x, y; /* Transformed coordinates */ | |
55 | ||
56 | ||
57 | if (num_params < 2) | |
58 | return; | |
59 | ||
60 | x = Transform[0][0] * params[0].value.number + | |
61 | Transform[0][1] * params[1].value.number + | |
62 | Transform[0][2]; | |
63 | y = Transform[1][0] * params[0].value.number + | |
64 | Transform[1][1] * params[1].value.number + | |
65 | Transform[1][2]; | |
66 | ||
67 | if (!PolygonMode) | |
68 | Outputf("MP\n"); | |
69 | ||
70 | PenValid = 1; | |
71 | ||
72 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); | |
73 | Outputf("%.3f %.3f LI\n", PenPosition[0], y); | |
74 | Outputf("%.3f %.3f LI\n", x, y); | |
75 | Outputf("%.3f %.3f LI\n", x, PenPosition[1]); | |
76 | ||
77 | Outputf("CP\n"); | |
78 | if (!PolygonMode) | |
79 | Outputf("ST\n"); | |
80 | } | |
81 | ||
82 | ||
83 | /* | |
84 | * 'EP_edge_polygon()' - Stroke the edges of a polygon. | |
85 | */ | |
86 | ||
87 | void | |
88 | EP_edge_polygon(int num_params, /* I - Number of parameters */ | |
89 | param_t *params) /* I - Parameters */ | |
90 | { | |
91 | (void)num_params; | |
92 | (void)params; | |
93 | ||
94 | Outputf("ST\n"); | |
95 | } | |
96 | ||
97 | ||
98 | /* | |
99 | * 'ER_edge_rect_relative()' - Draw a rectangle relative to the current | |
100 | * pen position. | |
101 | */ | |
102 | ||
103 | void | |
104 | ER_edge_rect_relative(int num_params, /* I - Number of parameters */ | |
105 | param_t *params) /* I - Parameters */ | |
106 | { | |
107 | float x, y; /* Transformed coordinates */ | |
108 | ||
109 | ||
110 | if (num_params < 2) | |
111 | return; | |
112 | ||
113 | x = Transform[0][0] * params[0].value.number + | |
114 | Transform[0][1] * params[1].value.number + | |
115 | PenPosition[0]; | |
116 | y = Transform[1][0] * params[0].value.number + | |
117 | Transform[1][1] * params[1].value.number + | |
118 | PenPosition[1]; | |
119 | ||
120 | if (!PolygonMode) | |
121 | Outputf("MP\n"); | |
122 | ||
123 | PenValid = 1; | |
124 | ||
125 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); | |
126 | Outputf("%.3f %.3f LI\n", PenPosition[0], y); | |
127 | Outputf("%.3f %.3f LI\n", x, y); | |
128 | Outputf("%.3f %.3f LI\n", x, PenPosition[1]); | |
129 | ||
130 | Outputf("CP\n"); | |
131 | if (!PolygonMode) | |
132 | Outputf("ST\n"); | |
133 | } | |
134 | ||
135 | ||
136 | /* | |
137 | * 'EW_edge_wedge()' - Draw a pie wedge. | |
138 | */ | |
139 | ||
140 | void | |
141 | EW_edge_wedge(int num_params, /* I - Number of parameters */ | |
142 | param_t *params) /* I - Parameters */ | |
143 | { | |
144 | float x, y; /* Transformed coordinates */ | |
145 | float start, end, /* Start and end of arc */ | |
146 | theta, /* Current angle */ | |
147 | dt, /* Step between points */ | |
148 | radius; /* Radius of arc */ | |
149 | ||
150 | ||
151 | if (num_params < 3) | |
152 | return; | |
153 | ||
154 | radius = params[0].value.number; | |
155 | start = params[1].value.number; | |
156 | end = start + params[2].value.number; | |
157 | ||
158 | if (num_params > 3) | |
159 | dt = (float)fabs(params[3].value.number); | |
160 | else | |
161 | dt = 5.0f; | |
162 | ||
163 | if (!PolygonMode) | |
164 | Outputf("MP\n"); | |
165 | ||
166 | PenValid = 1; | |
167 | ||
168 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); | |
169 | ||
170 | if (start < end) | |
171 | for (theta = start + dt; theta < end; theta += dt) | |
172 | { | |
173 | x = (float)(PenPosition[0] + | |
174 | radius * cos(M_PI * theta / 180.0) * Transform[0][0] + | |
175 | radius * sin(M_PI * theta / 180.0) * Transform[0][1]); | |
176 | y = (float)(PenPosition[1] + | |
177 | radius * cos(M_PI * theta / 180.0) * Transform[1][0] + | |
178 | radius * sin(M_PI * theta / 180.0) * Transform[1][1]); | |
179 | ||
180 | Outputf("%.3f %.3f LI\n", x, y); | |
181 | } | |
182 | else | |
183 | for (theta = start - dt; theta > end; theta -= dt) | |
184 | { | |
185 | x = (float)(PenPosition[0] + | |
186 | radius * cos(M_PI * theta / 180.0) * Transform[0][0] + | |
187 | radius * sin(M_PI * theta / 180.0) * Transform[0][1]); | |
188 | y = (float)(PenPosition[1] + | |
189 | radius * cos(M_PI * theta / 180.0) * Transform[1][0] + | |
190 | radius * sin(M_PI * theta / 180.0) * Transform[1][1]); | |
191 | ||
192 | Outputf("%.3f %.3f LI\n", x, y); | |
193 | } | |
194 | ||
195 | x = (float)(PenPosition[0] + | |
196 | radius * cos(M_PI * end / 180.0) * Transform[0][0] + | |
197 | radius * sin(M_PI * end / 180.0) * Transform[0][1]); | |
198 | y = (float)(PenPosition[1] + | |
199 | radius * cos(M_PI * end / 180.0) * Transform[1][0] + | |
200 | radius * sin(M_PI * end / 180.0) * Transform[1][1]); | |
201 | Outputf("%.3f %.3f LI\n", x, y); | |
202 | ||
203 | Outputf("CP\n"); | |
204 | if (!PolygonMode) | |
205 | Outputf("ST\n"); | |
206 | } | |
207 | ||
208 | ||
209 | /* | |
210 | * 'FP_fill_polygon()' - Fill a polygon. | |
211 | */ | |
212 | ||
213 | void | |
214 | FP_fill_polygon(int num_params, /* I - Number of parameters */ | |
215 | param_t *params) /* I - Parameters */ | |
216 | { | |
217 | (void)num_params; | |
218 | (void)params; | |
219 | ||
220 | Outputf("FI\n"); | |
221 | } | |
222 | ||
223 | ||
224 | /* | |
225 | * 'PM_polygon_mode()' - Set the polygon drawing mode. | |
226 | */ | |
227 | ||
228 | void | |
229 | PM_polygon_mode(int num_params, /* I - Number of parameters */ | |
230 | param_t *params) /* I - Parameters */ | |
231 | { | |
232 | if (num_params == 0 || | |
233 | params[0].value.number == 0) | |
234 | { | |
235 | Outputf("MP\n"); | |
236 | PenValid = 0; | |
237 | PolygonMode = 1; | |
238 | } | |
239 | else if (params[0].value.number == 2) | |
240 | PolygonMode = 0; | |
241 | } | |
242 | ||
243 | ||
244 | /* | |
245 | * 'RA_fill_rect_absolute()' - Fill a rectangle. | |
246 | */ | |
247 | ||
248 | void | |
249 | RA_fill_rect_absolute(int num_params, /* I - Number of parameters */ | |
250 | param_t *params) /* I - Parameters */ | |
251 | { | |
252 | float x, y; /* Transformed coordinates */ | |
253 | ||
254 | ||
255 | if (num_params < 2) | |
256 | return; | |
257 | ||
258 | x = Transform[0][0] * params[0].value.number + | |
259 | Transform[0][1] * params[1].value.number + | |
260 | Transform[0][2]; | |
261 | y = Transform[1][0] * params[0].value.number + | |
262 | Transform[1][1] * params[1].value.number + | |
263 | Transform[1][2]; | |
264 | ||
265 | if (!PolygonMode) | |
266 | Outputf("MP\n"); | |
267 | ||
268 | PenValid = 1; | |
269 | ||
270 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); | |
271 | Outputf("%.3f %.3f LI\n", PenPosition[0], y); | |
272 | Outputf("%.3f %.3f LI\n", x, y); | |
273 | Outputf("%.3f %.3f LI\n", x, PenPosition[1]); | |
274 | ||
275 | Outputf("CP\n"); | |
276 | if (!PolygonMode) | |
277 | Outputf("FI\n"); | |
278 | } | |
279 | ||
280 | ||
281 | /* | |
282 | * 'RR_fill_rect_relative()' - Fill a rectangle relative to the current | |
283 | * pen position. | |
284 | */ | |
285 | ||
286 | void | |
287 | RR_fill_rect_relative(int num_params, /* I - Number of parameters */ | |
288 | param_t *params) /* I - Parameters */ | |
289 | { | |
290 | float x, y; /* Transformed coordinates */ | |
291 | ||
292 | ||
293 | if (num_params < 2) | |
294 | return; | |
295 | ||
296 | x = Transform[0][0] * params[0].value.number + | |
297 | Transform[0][1] * params[1].value.number + | |
298 | PenPosition[0]; | |
299 | y = Transform[1][0] * params[0].value.number + | |
300 | Transform[1][1] * params[1].value.number + | |
301 | PenPosition[1]; | |
302 | ||
303 | if (!PolygonMode) | |
304 | Outputf("MP\n"); | |
305 | ||
306 | PenValid = 1; | |
307 | ||
308 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); | |
309 | Outputf("%.3f %.3f LI\n", PenPosition[0], y); | |
310 | Outputf("%.3f %.3f LI\n", x, y); | |
311 | Outputf("%.3f %.3f LI\n", x, PenPosition[1]); | |
312 | ||
313 | Outputf("CP\n"); | |
314 | if (!PolygonMode) | |
315 | Outputf("FI\n"); | |
316 | } | |
317 | ||
318 | ||
319 | /* | |
320 | * 'WG_fill_wedge()' - Fill a pie wedge. | |
321 | */ | |
322 | ||
323 | void | |
324 | WG_fill_wedge(int num_params, /* I - Number of parameters */ | |
325 | param_t *params) /* I - Parameters */ | |
326 | { | |
327 | float x, y; /* Transformed coordinates */ | |
328 | float start, end, /* Start and end angles */ | |
329 | theta, /* Current angle */ | |
330 | dt, /* Step between points */ | |
331 | radius; /* Radius of arc */ | |
332 | ||
333 | ||
334 | if (num_params < 3) | |
335 | return; | |
336 | ||
337 | radius = params[0].value.number; | |
338 | start = params[1].value.number; | |
339 | end = start + params[2].value.number; | |
340 | ||
341 | if (num_params > 3) | |
342 | dt = (float)fabs(params[3].value.number); | |
343 | else | |
344 | dt = 5.0; | |
345 | ||
346 | if (!PolygonMode) | |
347 | Outputf("MP\n"); | |
348 | ||
349 | PenValid = 1; | |
350 | ||
351 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); | |
352 | ||
353 | if (start < end) | |
354 | for (theta = start + dt; theta < end; theta += dt) | |
355 | { | |
356 | x = (float)(PenPosition[0] + | |
357 | radius * cos(M_PI * theta / 180.0) * Transform[0][0] + | |
358 | radius * sin(M_PI * theta / 180.0) * Transform[0][1]); | |
359 | y = (float)(PenPosition[1] + | |
360 | radius * cos(M_PI * theta / 180.0) * Transform[1][0] + | |
361 | radius * sin(M_PI * theta / 180.0) * Transform[1][1]); | |
362 | ||
363 | Outputf("%.3f %.3f LI\n", x, y); | |
364 | } | |
365 | else | |
366 | for (theta = start - dt; theta > end; theta -= dt) | |
367 | { | |
368 | x = (float)(PenPosition[0] + | |
369 | radius * cos(M_PI * theta / 180.0) * Transform[0][0] + | |
370 | radius * sin(M_PI * theta / 180.0) * Transform[0][1]); | |
371 | y = (float)(PenPosition[1] + | |
372 | radius * cos(M_PI * theta / 180.0) * Transform[1][0] + | |
373 | radius * sin(M_PI * theta / 180.0) * Transform[1][1]); | |
374 | ||
375 | Outputf("%.3f %.3f LI\n", x, y); | |
376 | } | |
377 | ||
378 | x = (float)(PenPosition[0] + | |
379 | radius * cos(M_PI * end / 180.0) * Transform[0][0] + | |
380 | radius * sin(M_PI * end / 180.0) * Transform[0][1]); | |
381 | y = (float)(PenPosition[1] + | |
382 | radius * cos(M_PI * end / 180.0) * Transform[1][0] + | |
383 | radius * sin(M_PI * end / 180.0) * Transform[1][1]); | |
384 | Outputf("%.3f %.3f LI\n", x, y); | |
385 | ||
386 | Outputf("CP\n"); | |
387 | if (!PolygonMode) | |
388 | Outputf("FI\n"); | |
389 | } | |
390 | ||
391 | ||
392 | /* | |
f7faf1f5 | 393 | * End of "$Id: hpgl-polygon.c 4494 2005-02-18 02:18:11Z mike $". |
ef416fc2 | 394 | */ |