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1 | /* |
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2 | * "$Id: hpgl-polygon.c 6649 2007-07-11 21:46:42Z mike $" |
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3 | * |
| 4 | * HP-GL/2 polygon routines for the Common UNIX Printing System (CUPS). |
| 5 | * |
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6 | * Copyright 2007 by Apple Inc. |
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7 | * Copyright 1993-2005 by Easy Software Products. |
| 8 | * |
| 9 | * These coded instructions, statements, and computer programs are the |
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10 | * property of Apple Inc. and are protected by Federal copyright |
| 11 | * law. Distribution and use rights are outlined in the file "LICENSE.txt" |
| 12 | * which should have been included with this file. If this file is |
| 13 | * file is missing or damaged, see the license at "http://www.cups.org/". |
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14 | * |
| 15 | * This file is subject to the Apple OS-Developed Software exception. |
| 16 | * |
| 17 | * Contents: |
| 18 | * |
| 19 | * EA_edge_rect_absolute() - Draw a rectangle. |
| 20 | * EP_edge_polygon() - Stroke the edges of a polygon. |
| 21 | * ER_edge_rect_relative() - Draw a rectangle relative to the current |
| 22 | * EW_edge_wedge() - Draw a pie wedge. |
| 23 | * FP_fill_polygon() - Fill a polygon. |
| 24 | * PM_polygon_mode() - Set the polygon drawing mode. |
| 25 | * RA_fill_rect_absolute() - Fill a rectangle. |
| 26 | * RR_fill_rect_relative() - Fill a rectangle relative to the current |
| 27 | * WG_fill_wedge() - Fill a pie wedge. |
| 28 | */ |
| 29 | |
| 30 | /* |
| 31 | * Include necessary headers... |
| 32 | */ |
| 33 | |
| 34 | #include "hpgltops.h" |
| 35 | |
| 36 | |
| 37 | /* |
| 38 | * 'EA_edge_rect_absolute()' - Draw a rectangle. |
| 39 | */ |
| 40 | |
| 41 | void |
| 42 | EA_edge_rect_absolute(int num_params, /* I - Number of parameters */ |
| 43 | param_t *params) /* I - Parameters */ |
| 44 | { |
| 45 | float x, y; /* Transformed coordinates */ |
| 46 | |
| 47 | |
| 48 | if (num_params < 2) |
| 49 | return; |
| 50 | |
| 51 | x = Transform[0][0] * params[0].value.number + |
| 52 | Transform[0][1] * params[1].value.number + |
| 53 | Transform[0][2]; |
| 54 | y = Transform[1][0] * params[0].value.number + |
| 55 | Transform[1][1] * params[1].value.number + |
| 56 | Transform[1][2]; |
| 57 | |
| 58 | if (!PolygonMode) |
| 59 | Outputf("MP\n"); |
| 60 | |
| 61 | PenValid = 1; |
| 62 | |
| 63 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); |
| 64 | Outputf("%.3f %.3f LI\n", PenPosition[0], y); |
| 65 | Outputf("%.3f %.3f LI\n", x, y); |
| 66 | Outputf("%.3f %.3f LI\n", x, PenPosition[1]); |
| 67 | |
| 68 | Outputf("CP\n"); |
| 69 | if (!PolygonMode) |
| 70 | Outputf("ST\n"); |
| 71 | } |
| 72 | |
| 73 | |
| 74 | /* |
| 75 | * 'EP_edge_polygon()' - Stroke the edges of a polygon. |
| 76 | */ |
| 77 | |
| 78 | void |
| 79 | EP_edge_polygon(int num_params, /* I - Number of parameters */ |
| 80 | param_t *params) /* I - Parameters */ |
| 81 | { |
| 82 | (void)num_params; |
| 83 | (void)params; |
| 84 | |
| 85 | Outputf("ST\n"); |
| 86 | } |
| 87 | |
| 88 | |
| 89 | /* |
| 90 | * 'ER_edge_rect_relative()' - Draw a rectangle relative to the current |
| 91 | * pen position. |
| 92 | */ |
| 93 | |
| 94 | void |
| 95 | ER_edge_rect_relative(int num_params, /* I - Number of parameters */ |
| 96 | param_t *params) /* I - Parameters */ |
| 97 | { |
| 98 | float x, y; /* Transformed coordinates */ |
| 99 | |
| 100 | |
| 101 | if (num_params < 2) |
| 102 | return; |
| 103 | |
| 104 | x = Transform[0][0] * params[0].value.number + |
| 105 | Transform[0][1] * params[1].value.number + |
| 106 | PenPosition[0]; |
| 107 | y = Transform[1][0] * params[0].value.number + |
| 108 | Transform[1][1] * params[1].value.number + |
| 109 | PenPosition[1]; |
| 110 | |
| 111 | if (!PolygonMode) |
| 112 | Outputf("MP\n"); |
| 113 | |
| 114 | PenValid = 1; |
| 115 | |
| 116 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); |
| 117 | Outputf("%.3f %.3f LI\n", PenPosition[0], y); |
| 118 | Outputf("%.3f %.3f LI\n", x, y); |
| 119 | Outputf("%.3f %.3f LI\n", x, PenPosition[1]); |
| 120 | |
| 121 | Outputf("CP\n"); |
| 122 | if (!PolygonMode) |
| 123 | Outputf("ST\n"); |
| 124 | } |
| 125 | |
| 126 | |
| 127 | /* |
| 128 | * 'EW_edge_wedge()' - Draw a pie wedge. |
| 129 | */ |
| 130 | |
| 131 | void |
| 132 | EW_edge_wedge(int num_params, /* I - Number of parameters */ |
| 133 | param_t *params) /* I - Parameters */ |
| 134 | { |
| 135 | float x, y; /* Transformed coordinates */ |
| 136 | float start, end, /* Start and end of arc */ |
| 137 | theta, /* Current angle */ |
| 138 | dt, /* Step between points */ |
| 139 | radius; /* Radius of arc */ |
| 140 | |
| 141 | |
| 142 | if (num_params < 3) |
| 143 | return; |
| 144 | |
| 145 | radius = params[0].value.number; |
| 146 | start = params[1].value.number; |
| 147 | end = start + params[2].value.number; |
| 148 | |
| 149 | if (num_params > 3) |
| 150 | dt = (float)fabs(params[3].value.number); |
| 151 | else |
| 152 | dt = 5.0f; |
| 153 | |
| 154 | if (!PolygonMode) |
| 155 | Outputf("MP\n"); |
| 156 | |
| 157 | PenValid = 1; |
| 158 | |
| 159 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); |
| 160 | |
| 161 | if (start < end) |
| 162 | for (theta = start + dt; theta < end; theta += dt) |
| 163 | { |
| 164 | x = (float)(PenPosition[0] + |
| 165 | radius * cos(M_PI * theta / 180.0) * Transform[0][0] + |
| 166 | radius * sin(M_PI * theta / 180.0) * Transform[0][1]); |
| 167 | y = (float)(PenPosition[1] + |
| 168 | radius * cos(M_PI * theta / 180.0) * Transform[1][0] + |
| 169 | radius * sin(M_PI * theta / 180.0) * Transform[1][1]); |
| 170 | |
| 171 | Outputf("%.3f %.3f LI\n", x, y); |
| 172 | } |
| 173 | else |
| 174 | for (theta = start - dt; theta > end; theta -= dt) |
| 175 | { |
| 176 | x = (float)(PenPosition[0] + |
| 177 | radius * cos(M_PI * theta / 180.0) * Transform[0][0] + |
| 178 | radius * sin(M_PI * theta / 180.0) * Transform[0][1]); |
| 179 | y = (float)(PenPosition[1] + |
| 180 | radius * cos(M_PI * theta / 180.0) * Transform[1][0] + |
| 181 | radius * sin(M_PI * theta / 180.0) * Transform[1][1]); |
| 182 | |
| 183 | Outputf("%.3f %.3f LI\n", x, y); |
| 184 | } |
| 185 | |
| 186 | x = (float)(PenPosition[0] + |
| 187 | radius * cos(M_PI * end / 180.0) * Transform[0][0] + |
| 188 | radius * sin(M_PI * end / 180.0) * Transform[0][1]); |
| 189 | y = (float)(PenPosition[1] + |
| 190 | radius * cos(M_PI * end / 180.0) * Transform[1][0] + |
| 191 | radius * sin(M_PI * end / 180.0) * Transform[1][1]); |
| 192 | Outputf("%.3f %.3f LI\n", x, y); |
| 193 | |
| 194 | Outputf("CP\n"); |
| 195 | if (!PolygonMode) |
| 196 | Outputf("ST\n"); |
| 197 | } |
| 198 | |
| 199 | |
| 200 | /* |
| 201 | * 'FP_fill_polygon()' - Fill a polygon. |
| 202 | */ |
| 203 | |
| 204 | void |
| 205 | FP_fill_polygon(int num_params, /* I - Number of parameters */ |
| 206 | param_t *params) /* I - Parameters */ |
| 207 | { |
| 208 | (void)num_params; |
| 209 | (void)params; |
| 210 | |
| 211 | Outputf("FI\n"); |
| 212 | } |
| 213 | |
| 214 | |
| 215 | /* |
| 216 | * 'PM_polygon_mode()' - Set the polygon drawing mode. |
| 217 | */ |
| 218 | |
| 219 | void |
| 220 | PM_polygon_mode(int num_params, /* I - Number of parameters */ |
| 221 | param_t *params) /* I - Parameters */ |
| 222 | { |
| 223 | if (num_params == 0 || |
| 224 | params[0].value.number == 0) |
| 225 | { |
| 226 | Outputf("MP\n"); |
| 227 | PenValid = 0; |
| 228 | PolygonMode = 1; |
| 229 | } |
| 230 | else if (params[0].value.number == 2) |
| 231 | PolygonMode = 0; |
| 232 | } |
| 233 | |
| 234 | |
| 235 | /* |
| 236 | * 'RA_fill_rect_absolute()' - Fill a rectangle. |
| 237 | */ |
| 238 | |
| 239 | void |
| 240 | RA_fill_rect_absolute(int num_params, /* I - Number of parameters */ |
| 241 | param_t *params) /* I - Parameters */ |
| 242 | { |
| 243 | float x, y; /* Transformed coordinates */ |
| 244 | |
| 245 | |
| 246 | if (num_params < 2) |
| 247 | return; |
| 248 | |
| 249 | x = Transform[0][0] * params[0].value.number + |
| 250 | Transform[0][1] * params[1].value.number + |
| 251 | Transform[0][2]; |
| 252 | y = Transform[1][0] * params[0].value.number + |
| 253 | Transform[1][1] * params[1].value.number + |
| 254 | Transform[1][2]; |
| 255 | |
| 256 | if (!PolygonMode) |
| 257 | Outputf("MP\n"); |
| 258 | |
| 259 | PenValid = 1; |
| 260 | |
| 261 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); |
| 262 | Outputf("%.3f %.3f LI\n", PenPosition[0], y); |
| 263 | Outputf("%.3f %.3f LI\n", x, y); |
| 264 | Outputf("%.3f %.3f LI\n", x, PenPosition[1]); |
| 265 | |
| 266 | Outputf("CP\n"); |
| 267 | if (!PolygonMode) |
| 268 | Outputf("FI\n"); |
| 269 | } |
| 270 | |
| 271 | |
| 272 | /* |
| 273 | * 'RR_fill_rect_relative()' - Fill a rectangle relative to the current |
| 274 | * pen position. |
| 275 | */ |
| 276 | |
| 277 | void |
| 278 | RR_fill_rect_relative(int num_params, /* I - Number of parameters */ |
| 279 | param_t *params) /* I - Parameters */ |
| 280 | { |
| 281 | float x, y; /* Transformed coordinates */ |
| 282 | |
| 283 | |
| 284 | if (num_params < 2) |
| 285 | return; |
| 286 | |
| 287 | x = Transform[0][0] * params[0].value.number + |
| 288 | Transform[0][1] * params[1].value.number + |
| 289 | PenPosition[0]; |
| 290 | y = Transform[1][0] * params[0].value.number + |
| 291 | Transform[1][1] * params[1].value.number + |
| 292 | PenPosition[1]; |
| 293 | |
| 294 | if (!PolygonMode) |
| 295 | Outputf("MP\n"); |
| 296 | |
| 297 | PenValid = 1; |
| 298 | |
| 299 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); |
| 300 | Outputf("%.3f %.3f LI\n", PenPosition[0], y); |
| 301 | Outputf("%.3f %.3f LI\n", x, y); |
| 302 | Outputf("%.3f %.3f LI\n", x, PenPosition[1]); |
| 303 | |
| 304 | Outputf("CP\n"); |
| 305 | if (!PolygonMode) |
| 306 | Outputf("FI\n"); |
| 307 | } |
| 308 | |
| 309 | |
| 310 | /* |
| 311 | * 'WG_fill_wedge()' - Fill a pie wedge. |
| 312 | */ |
| 313 | |
| 314 | void |
| 315 | WG_fill_wedge(int num_params, /* I - Number of parameters */ |
| 316 | param_t *params) /* I - Parameters */ |
| 317 | { |
| 318 | float x, y; /* Transformed coordinates */ |
| 319 | float start, end, /* Start and end angles */ |
| 320 | theta, /* Current angle */ |
| 321 | dt, /* Step between points */ |
| 322 | radius; /* Radius of arc */ |
| 323 | |
| 324 | |
| 325 | if (num_params < 3) |
| 326 | return; |
| 327 | |
| 328 | radius = params[0].value.number; |
| 329 | start = params[1].value.number; |
| 330 | end = start + params[2].value.number; |
| 331 | |
| 332 | if (num_params > 3) |
| 333 | dt = (float)fabs(params[3].value.number); |
| 334 | else |
| 335 | dt = 5.0; |
| 336 | |
| 337 | if (!PolygonMode) |
| 338 | Outputf("MP\n"); |
| 339 | |
| 340 | PenValid = 1; |
| 341 | |
| 342 | Outputf("%.3f %.3f MO\n", PenPosition[0], PenPosition[1]); |
| 343 | |
| 344 | if (start < end) |
| 345 | for (theta = start + dt; theta < end; theta += dt) |
| 346 | { |
| 347 | x = (float)(PenPosition[0] + |
| 348 | radius * cos(M_PI * theta / 180.0) * Transform[0][0] + |
| 349 | radius * sin(M_PI * theta / 180.0) * Transform[0][1]); |
| 350 | y = (float)(PenPosition[1] + |
| 351 | radius * cos(M_PI * theta / 180.0) * Transform[1][0] + |
| 352 | radius * sin(M_PI * theta / 180.0) * Transform[1][1]); |
| 353 | |
| 354 | Outputf("%.3f %.3f LI\n", x, y); |
| 355 | } |
| 356 | else |
| 357 | for (theta = start - dt; theta > end; theta -= dt) |
| 358 | { |
| 359 | x = (float)(PenPosition[0] + |
| 360 | radius * cos(M_PI * theta / 180.0) * Transform[0][0] + |
| 361 | radius * sin(M_PI * theta / 180.0) * Transform[0][1]); |
| 362 | y = (float)(PenPosition[1] + |
| 363 | radius * cos(M_PI * theta / 180.0) * Transform[1][0] + |
| 364 | radius * sin(M_PI * theta / 180.0) * Transform[1][1]); |
| 365 | |
| 366 | Outputf("%.3f %.3f LI\n", x, y); |
| 367 | } |
| 368 | |
| 369 | x = (float)(PenPosition[0] + |
| 370 | radius * cos(M_PI * end / 180.0) * Transform[0][0] + |
| 371 | radius * sin(M_PI * end / 180.0) * Transform[0][1]); |
| 372 | y = (float)(PenPosition[1] + |
| 373 | radius * cos(M_PI * end / 180.0) * Transform[1][0] + |
| 374 | radius * sin(M_PI * end / 180.0) * Transform[1][1]); |
| 375 | Outputf("%.3f %.3f LI\n", x, y); |
| 376 | |
| 377 | Outputf("CP\n"); |
| 378 | if (!PolygonMode) |
| 379 | Outputf("FI\n"); |
| 380 | } |
| 381 | |
| 382 | |
| 383 | /* |
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384 | * End of "$Id: hpgl-polygon.c 6649 2007-07-11 21:46:42Z mike $". |
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385 | */ |
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