src/cpml/tests/test-segment.c

   1 /* ADG - Automatic Drawing Generation
   2  * Copyright (C) 2007-2015  Nicola Fontana <ntd at entidi.it>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17  * Boston, MA  02110-1301, USA.
  18  */
  19
  20
  21 #include <adg-test.h>
  22 #include <cpml.h>
  23
  24
  25 static cairo_path_data_t data[] = {
  26     /* Useless heading CPML_MOVE */
  27     { .header = { CPML_MOVE, 2 }},
  28     { .point = { 0, 0 }},
  29
  30     /* First segment: a couple of lines of length 2 */
  31     { .header = { CPML_MOVE, 2 }},
  32     { .point = { 0, 0 }},
  33     { .header = { CPML_LINE, 2 }},
  34     { .point = { 2, 0 }},
  35     { .header = { CPML_LINE, 2 }},
  36     { .point = { 2, 2 }},
  37
  38     /* Another useless CPML_MOVE with useless embedded data */
  39     { .header = { CPML_MOVE, 3 }},
  40     { .point = { 0, 0 }},
  41     { .point = { 0, 0 }},
  42
  43     /* Second segment: a Bézier curve with a trailing CPML_CLOSE */
  44     { .header = { CPML_MOVE, 2 }},
  45     { .point = { 10, 13 }},
  46     { .header = { CPML_CURVE, 4 }},
  47     { .point = { 8, 9 }},
  48     { .point = { 10, 11 }},
  49     { .point = { 12, 13 }},
  50     { .header = { CPML_CLOSE, 1 }},
  51
  52     /* A valid cairo segment considered invalid by CPML
  53      * because does not have a leading CPML_MOVE */
  54     { .header = { CPML_LINE, 2 }},
  55     { .point = { 10, 0 }},
  56     { .header = { CPML_CLOSE, 1 }},
  57
  58     /* Another valid cairo segment invalid in CPML */
  59     { .header = { CPML_CLOSE, 1 }},
  60
  61     /* Third segment: a couple of arcs */
  62     { .header = { CPML_MOVE, 2 }},
  63     { .point = { 14, 15 }},
  64     { .header = { CPML_ARC, 3 }},
  65     { .point = { 16, 17 }},
  66     { .point = { 18, 19 }},
  67     { .header = { CPML_ARC, 3 }},
  68     { .point = { 20, 21 }},
  69     { .point = { 22, 23 }},
  70
  71     /* Forth segment: a floating CPML_CLOSE */
  72     { .header = { CPML_MOVE, 2 }},
  73     { .point = { 24, 25 }},
  74     { .header = { CPML_CLOSE, 1 }}
  75 };
  76
  77 static cairo_path_data_t noop_data[] = {
  78     /* Useless heading CPML_MOVE */
  79     { .header = { CPML_MOVE, 2 }},
  80     { .point = { 0, 1 }},
  81     { .header = { CPML_MOVE, 4 }},
  82     { .point = { 2, 3 }},
  83     { .point = { 4, 5 }},
  84     { .point = { 6, 7 }},
  85     { .header = { CPML_MOVE, 2 }},
  86     { .point = { 8, 9 }}
  87 };
  88
  89 static cairo_path_data_t y1_data[] = {
  90     { .header = { CPML_MOVE, 2 }},
  91     { .point = { 0, 1 }},
  92     { .header = { CPML_LINE, 2 }},
  93     { .point = { 5, 1 }}
  94 };
  95
  96 cairo_path_t path = {
  97     CAIRO_STATUS_SUCCESS,
  98     data,
  99     G_N_ELEMENTS(data)
 100 };
 101
 102 cairo_path_t noop_path = {
 103     CAIRO_STATUS_SUCCESS,
 104     noop_data,
 105     G_N_ELEMENTS(noop_data)
 106 };
 107
 108 cairo_path_t y1_path = {
 109     CAIRO_STATUS_SUCCESS,
 110     y1_data,
 111     G_N_ELEMENTS(y1_data)
 112 };
 113
 114
 115 static void
 116 _cpml_test_browsing(void)
 117 {
 118     CpmlSegment segment;
 119     cpml_segment_from_cairo(&segment, &path);
 120
 121     /* First segment */
 122     g_assert_cmpint(segment.data[0].header.type, ==, CPML_MOVE);
 123     g_assert_cmpint(segment.data[2].header.type, ==, CPML_LINE);
 124
 125     cpml_segment_reset(&segment);
 126     g_assert_cmpint(segment.data[0].header.type, ==, CPML_MOVE);
 127     g_assert_cmpint(segment.data[2].header.type, ==, CPML_LINE);
 128
 129     /* Second segment */
 130     g_assert_cmpint(cpml_segment_next(&segment), ==, 1);
 131     g_assert_cmpint(segment.data[0].header.type, ==, CPML_MOVE);
 132     g_assert_cmpint(segment.data[2].header.type, ==, CPML_CURVE);
 133
 134     /* Third segment */
 135     g_assert_cmpint(cpml_segment_next(&segment), ==, 1);
 136     g_assert_cmpint(segment.data[0].header.type, ==, CPML_MOVE);
 137     g_assert_cmpint(segment.data[2].header.type, ==, CPML_ARC);
 138
 139     /* Forth segment */
 140     g_assert_cmpint(cpml_segment_next(&segment), ==, 1);
 141     g_assert_cmpint(segment.data[0].header.type, ==, CPML_MOVE);
 142     g_assert_cmpint(segment.data[2].header.type, ==, CPML_CLOSE);
 143
 144     g_assert_cmpint(cpml_segment_next(&segment), ==, 0);
 145
 146     cpml_segment_reset(&segment);
 147     g_assert_cmpint(segment.data[0].header.type, ==, CPML_MOVE);
 148     g_assert_cmpint(segment.data[2].header.type, ==, CPML_LINE);
 149 }
 150
 151 static void
 152 _cpml_test_from_cairo(void)
 153 {
 154     CpmlSegment segment;
 155     g_assert_cmpint(cpml_segment_from_cairo(NULL, &path), ==, 0);
 156     g_assert_cmpint(cpml_segment_from_cairo(&segment, NULL), ==, 0);
 157     g_assert_cmpint(cpml_segment_from_cairo(NULL, NULL), ==, 0);
 158
 159     g_assert_cmpint(cpml_segment_from_cairo(&segment, &noop_path), ==, 0);
 160     g_assert_cmpint(cpml_segment_from_cairo(&segment, &path), ==, 1);
 161 }
 162
 163 static void
 164 _cpml_test_get_length(void)
 165 {
 166     CpmlSegment segment;
 167     cpml_segment_from_cairo(&segment, &path);
 168
 169     g_assert_cmpfloat(cpml_segment_get_length(NULL), ==, 0);
 170
 171     /* First segment */
 172     g_assert_cmpfloat(cpml_segment_get_length(&segment), ==, 4);
 173     g_assert_cmpfloat(cpml_segment_get_length(&segment), ==, 4);
 174
 175     /* Second segment */
 176     cpml_segment_next(&segment);
 177     /* TODO: Bézier curve length not yet implemented
 178      * g_assert_cmpfloat(cpml_segment_get_length(&segment), ==, ???); */
 179
 180     /* Third segment */
 181     cpml_segment_next(&segment);
 182     g_assert_cmpfloat(cpml_segment_get_length(&segment), ==, 0);
 183
 184     /* Forth segment */
 185     cpml_segment_next(&segment);
 186     g_assert_cmpfloat(cpml_segment_get_length(&segment), ==, 0);
 187 }
 188
 189 static void
 190 _cpml_test_put_intersections(void)
 191 {
 192     CpmlSegment segment1, segment2;
 193     CpmlPair pair[2];
 194
 195     cpml_segment_from_cairo(&segment1, &path);
 196     cpml_segment_from_cairo(&segment2, &y1_path);
 197
 198     g_assert_cmpuint(cpml_segment_put_intersections(NULL, &segment2, 2, pair), ==, 0);
 199     g_assert_cmpuint(cpml_segment_put_intersections(&segment1, NULL, 2, pair), ==, 0);
 200     g_assert_cmpuint(cpml_segment_put_intersections(&segment1, &segment2, 0, pair), ==, 0);
 201     g_assert_cmpuint(cpml_segment_put_intersections(&segment1, &segment2, 2, NULL), ==, 0);
 202
 203     /* The first segment of path intersects y1_path in (2, 1) */
 204     g_assert_cmpuint(cpml_segment_put_intersections(&segment1, &segment2, 2, pair), ==, 1);
 205     g_assert_cmpfloat(pair[0].x, ==, 2);
 206     g_assert_cmpfloat(pair[0].y, ==, 1);
 207
 208     /* The third segment of path does not intersect y1_path */
 209     cpml_segment_next(&segment1);
 210     cpml_segment_next(&segment1);
 211     g_assert_cmpuint(cpml_segment_put_intersections(&segment1, &segment2, 2, pair), ==, 0);
 212 }
 213
 214 static void
 215 _cpml_test_offset(void)
 216 {
 217     CpmlSegment original, *segment;
 218
 219     /* Check a NULL segment does not crash the process */
 220     cpml_segment_offset(NULL, 1);
 221
 222     cpml_segment_from_cairo(&original, &path);
 223
 224     /* Working on a duplicate of the first segment to avoid modifying path */
 225     segment = cpml_segment_deep_dup(&original);
 226     cpml_segment_offset(segment, 1);
 227
 228     g_assert_cmpint(segment->data[0].header.type, ==, CPML_MOVE);
 229     g_assert_cmpfloat(segment->data[1].point.x, ==, 0);
 230     g_assert_cmpfloat(segment->data[1].point.y, ==, 1);
 231
 232     g_assert_cmpint(segment->data[2].header.type, ==, CPML_LINE);
 233     g_assert_cmpfloat(segment->data[3].point.x, ==, 1);
 234     g_assert_cmpfloat(segment->data[3].point.y, ==, 1);
 235
 236     g_assert_cmpint(segment->data[4].header.type, ==, CPML_LINE);
 237     g_assert_cmpfloat(segment->data[5].point.x, ==, 1);
 238     g_assert_cmpfloat(segment->data[5].point.y, ==, 2);
 239
 240     /* TODO: provide tests for arcs and curves */
 241
 242     g_free(segment);
 243 }
 244
 245 static void
 246 _cpml_test_transform(void)
 247 {
 248     CpmlSegment original, *segment;
 249     cairo_matrix_t matrix;
 250
 251     cpml_segment_from_cairo(&original, &path);
 252
 253     /* Working on a duplicate of the first segment to avoid modifying path */
 254     segment = cpml_segment_deep_dup(&original);
 255
 256     /* Check invalid args does not crash the process */
 257     cpml_segment_transform(NULL, &matrix);
 258     cpml_segment_transform(segment, NULL);
 259
 260     cairo_matrix_init_translate(&matrix, 1, 2);
 261     cpml_segment_transform(segment, &matrix);
 262
 263     g_assert_cmpint(segment->data[0].header.type, ==, CPML_MOVE);
 264     g_assert_cmpfloat(segment->data[1].point.x, ==, 1);
 265     g_assert_cmpfloat(segment->data[1].point.y, ==, 2);
 266
 267     g_assert_cmpint(segment->data[2].header.type, ==, CPML_LINE);
 268     g_assert_cmpfloat(segment->data[3].point.x, ==, 3);
 269     g_assert_cmpfloat(segment->data[3].point.y, ==, 2);
 270
 271     g_assert_cmpint(segment->data[4].header.type, ==, CPML_LINE);
 272     g_assert_cmpfloat(segment->data[5].point.x, ==, 3);
 273     g_assert_cmpfloat(segment->data[5].point.y, ==, 4);
 274
 275     g_free(segment);
 276 }
 277
 278 static void
 279 _cpml_test_reverse(void)
 280 {
 281     CpmlSegment original, *segment;
 282
 283     /* Check a NULL segment does not crash the process */
 284     cpml_segment_reverse(NULL);
 285
 286     cpml_segment_from_cairo(&original, &path);
 287
 288     /* First segment: work on a duplicate to avoid modifying path */
 289     segment = cpml_segment_deep_dup(&original);
 290     cpml_segment_reverse(segment);
 291
 292     g_assert_cmpint(segment->num_data, ==, 6);
 293
 294     g_assert_cmpint(segment->data[0].header.type, ==, CPML_MOVE);
 295     g_assert_cmpfloat(segment->data[1].point.x, ==, 2);
 296     g_assert_cmpfloat(segment->data[1].point.y, ==, 2);
 297
 298     g_assert_cmpint(segment->data[2].header.type, ==, CPML_LINE);
 299     g_assert_cmpfloat(segment->data[3].point.x, ==, 2);
 300     g_assert_cmpfloat(segment->data[3].point.y, ==, 0);
 301
 302     g_assert_cmpint(segment->data[4].header.type, ==, CPML_LINE);
 303     g_assert_cmpfloat(segment->data[5].point.x, ==, 0);
 304     g_assert_cmpfloat(segment->data[5].point.y, ==, 0);
 305
 306     g_free(segment);
 307
 308     /* TODO: the second segment is an invalid CPML segment because
 309      * it is followed by a segment without a leading move_to.
 310      * Find a decent reverse algorithm and document it.
 311      * I'm just skipping that segment for now.
 312      */
 313     cpml_segment_next(&original);
 314
 315     /* Third segment */
 316     cpml_segment_next(&original);
 317     segment = cpml_segment_deep_dup(&original);
 318     cpml_segment_reverse(segment);
 319
 320     g_assert_cmpint(segment->num_data, ==, 8);
 321
 322     g_assert_cmpint(segment->data[0].header.type, ==, CPML_MOVE);
 323     g_assert_cmpfloat(segment->data[1].point.x, ==, 22);
 324     g_assert_cmpfloat(segment->data[1].point.y, ==, 23);
 325
 326     g_assert_cmpint(segment->data[2].header.type, ==, CPML_ARC);
 327     g_assert_cmpfloat(segment->data[3].point.x, ==, 20);
 328     g_assert_cmpfloat(segment->data[3].point.y, ==, 21);
 329     g_assert_cmpfloat(segment->data[4].point.x, ==, 18);
 330     g_assert_cmpfloat(segment->data[4].point.y, ==, 19);
 331
 332     g_assert_cmpint(segment->data[5].header.type, ==, CPML_ARC);
 333     g_assert_cmpfloat(segment->data[6].point.x, ==, 16);
 334     g_assert_cmpfloat(segment->data[6].point.y, ==, 17);
 335     g_assert_cmpfloat(segment->data[7].point.x, ==, 14);
 336     g_assert_cmpfloat(segment->data[7].point.y, ==, 15);
 337
 338     g_free(segment);
 339
 340     /* Forth segment */
 341     cpml_segment_next(&original);
 342     segment = cpml_segment_deep_dup(&original);
 343     cpml_segment_reverse(segment);
 344
 345     g_assert_cmpint(segment->num_data, ==, 3);
 346
 347     g_assert_cmpint(segment->data[0].header.type, ==, CPML_MOVE);
 348     g_assert_cmpfloat(segment->data[1].point.x, ==, 24);
 349     g_assert_cmpfloat(segment->data[1].point.y, ==, 25);
 350
 351     g_assert_cmpint(segment->data[2].header.type, ==, CPML_CLOSE);
 352
 353     g_free(segment);
 354 }
 355
 356 static void
 357 _cpml_test_to_cairo(void)
 358 {
 359     cairo_t *cr;
 360     CpmlSegment segment;
 361     int length, last_length;
 362
 363     cr = adg_test_cairo_context();
 364     cpml_segment_from_cairo(&segment, &path);
 365
 366     g_assert_cmpint(adg_test_cairo_num_data(cr), ==, 0);
 367     cpml_segment_to_cairo(NULL, cr);
 368     g_assert_cmpint(adg_test_cairo_num_data(cr), ==, 0);
 369     cpml_segment_to_cairo(&segment, NULL);
 370     g_assert_cmpint(adg_test_cairo_num_data(cr), ==, 0);
 371
 372     length = 0;
 373     do {
 374         last_length = length;
 375         cpml_segment_to_cairo(&segment, cr);
 376         length = adg_test_cairo_num_data(cr);
 377         g_assert_cmpint(length, >, last_length);
 378     } while (cpml_segment_next(&segment));
 379
 380     cairo_destroy(cr);
 381 }
 382
 383 static void
 384 _cpml_test_dump(void)
 385 {
 386 #if GLIB_CHECK_VERSION(2, 38, 0)
 387     if (g_test_subprocess()) {
 388         CpmlSegment segment;
 389
 390         /* This should not crash the process */
 391         cpml_segment_dump(NULL);
 392
 393         cpml_segment_from_cairo(&segment, &path);
 394         cpml_segment_dump(&segment);
 395
 396         cpml_segment_next(&segment);
 397         cpml_segment_dump(&segment);
 398
 399         return;
 400     }
 401
 402     g_test_trap_subprocess(NULL, 0, 0);
 403     g_test_trap_assert_passed();
 404     g_test_trap_assert_stderr_unmatched("?");
 405     g_test_trap_assert_stdout("*NULL*");
 406     g_test_trap_assert_stdout("*move*");
 407     g_test_trap_assert_stdout("*line*");
 408     g_test_trap_assert_stdout("*curve*");
 409     g_test_trap_assert_stdout_unmatched("*arc*");
 410 #endif
 411 }
 412
 413
 414 int
 415 main(int argc, char *argv[])
 416 {
 417     adg_test_init(&argc, &argv);
 418
 419     adg_test_add_func("/cpml/segment/behavior/browsing", _cpml_test_browsing);
 420
 421     adg_test_add_func("/cpml/segment/method/from-cairo", _cpml_test_from_cairo);
 422     adg_test_add_func("/cpml/segment/method/get-length", _cpml_test_get_length);
 423     adg_test_add_func("/cpml/segment/method/put-intersections", _cpml_test_put_intersections);
 424     adg_test_add_func("/cpml/segment/method/offset", _cpml_test_offset);
 425     adg_test_add_func("/cpml/segment/method/transform", _cpml_test_transform);
 426     adg_test_add_func("/cpml/segment/method/reverse", _cpml_test_reverse);
 427     adg_test_add_func("/cpml/segment/method/to-cairo", _cpml_test_to_cairo);
 428     adg_test_add_func("/cpml/segment/method/dump", _cpml_test_dump);
 429
 430     return g_test_run();
 431 }