2 * Copyright 2015 Google Inc.
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
14 void test_concave(SkCanvas* canvas, const SkPaint& paint) {
16 canvas->translate(0, 0);
17 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
18 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
19 path.lineTo(SkIntToScalar(30), SkIntToScalar(30));
20 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
21 canvas->drawPath(path, paint);
24 // Reverse concave test
25 void test_reverse_concave(SkCanvas* canvas, const SkPaint& paint) {
28 canvas->translate(100, 0);
29 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
30 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
31 path.lineTo(SkIntToScalar(30), SkIntToScalar(30));
32 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
33 canvas->drawPath(path, paint);
37 // Bowtie (intersection)
38 void test_bowtie(SkCanvas* canvas, const SkPaint& paint) {
41 canvas->translate(200, 0);
42 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
43 path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
44 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
45 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
46 canvas->drawPath(path, paint);
50 // "fake" bowtie (concave, but no intersection)
51 void test_fake_bowtie(SkCanvas* canvas, const SkPaint& paint) {
54 canvas->translate(300, 0);
55 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
56 path.lineTo(SkIntToScalar(50), SkIntToScalar(40));
57 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
58 path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
59 path.lineTo(SkIntToScalar(50), SkIntToScalar(60));
60 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
61 canvas->drawPath(path, paint);
65 // Bowtie with a smaller right hand lobe. The outer vertex of the left hand
66 // lobe intrudes into the interior of the right hand lobe.
67 void test_intruding_vertex(SkCanvas* canvas, const SkPaint& paint) {
70 canvas->translate(400, 0);
71 path.setIsVolatile(true);
78 canvas->drawPath(path, paint);
82 // A shape with an edge that becomes inverted on AA stroking and that also contains
83 // a repeated start/end vertex.
84 void test_inversion_repeat_vertex(SkCanvas* canvas, const SkPaint& paint) {
87 canvas->translate(400, 100);
88 path.setIsVolatile(true);
93 path.lineTo(39.99f, 80);
95 canvas->drawPath(path, paint);
99 // Fish test (intersection/concave)
100 void test_fish(SkCanvas* canvas, const SkPaint& paint) {
103 canvas->translate(0, 100);
104 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
105 path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
106 path.lineTo(SkIntToScalar(70), SkIntToScalar(50));
107 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
108 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
109 path.lineTo(SkIntToScalar(0), SkIntToScalar(50));
110 canvas->drawPath(path, paint);
114 // Overlapping "Fast-forward" icon: tests coincidence of inner and outer
115 // vertices generated by intersection.
116 void test_fast_forward(SkCanvas* canvas, const SkPaint& paint) {
119 canvas->translate(100, 100);
120 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
121 path.lineTo(SkIntToScalar(60), SkIntToScalar(50));
122 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
123 path.moveTo(SkIntToScalar(40), SkIntToScalar(20));
124 path.lineTo(SkIntToScalar(40), SkIntToScalar(80));
125 path.lineTo(SkIntToScalar(80), SkIntToScalar(50));
126 canvas->drawPath(path, paint);
130 // Square polygon with a square hole.
131 void test_hole(SkCanvas* canvas, const SkPaint& paint) {
134 canvas->translate(200, 100);
135 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
136 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
137 path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
138 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
139 path.moveTo(SkIntToScalar(30), SkIntToScalar(30));
140 path.lineTo(SkIntToScalar(30), SkIntToScalar(70));
141 path.lineTo(SkIntToScalar(70), SkIntToScalar(70));
142 path.lineTo(SkIntToScalar(70), SkIntToScalar(30));
143 canvas->drawPath(path, paint);
147 // Star test (self-intersecting)
148 void test_star(SkCanvas* canvas, const SkPaint& paint) {
151 canvas->translate(300, 100);
158 canvas->drawPath(path, paint);
162 // Stairstep with repeated vert (intersection)
163 void test_stairstep(SkCanvas* canvas, const SkPaint& paint) {
166 canvas->translate(0, 200);
167 path.moveTo(SkIntToScalar(50), SkIntToScalar(50));
168 path.lineTo(SkIntToScalar(50), SkIntToScalar(20));
169 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
170 path.lineTo(SkIntToScalar(50), SkIntToScalar(50));
171 path.lineTo(SkIntToScalar(20), SkIntToScalar(50));
172 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
173 canvas->drawPath(path, paint);
177 void test_stairstep2(SkCanvas* canvas, const SkPaint& paint) {
180 canvas->translate(100, 200);
186 canvas->drawPath(path, paint);
190 // Overlapping segments
191 void test_overlapping(SkCanvas* canvas, const SkPaint& paint) {
194 canvas->translate(200, 200);
195 path.moveTo(SkIntToScalar(20), SkIntToScalar(80));
196 path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
197 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
198 path.lineTo(SkIntToScalar(80), SkIntToScalar(30));
199 canvas->drawPath(path, paint);
203 // Two "island" triangles inside a containing rect.
204 // This exercises the partnering code in the tessellator.
205 void test_partners(SkCanvas* canvas, const SkPaint& paint) {
208 canvas->translate(300, 200);
219 canvas->drawPath(path, paint);
223 // Monotone test 1 (point in the middle)
224 void test_monotone_1(SkCanvas* canvas, const SkPaint& paint) {
227 canvas->translate(0, 300);
228 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
229 path.quadTo(SkIntToScalar(20), SkIntToScalar(50),
230 SkIntToScalar(80), SkIntToScalar(50));
231 path.quadTo(SkIntToScalar(20), SkIntToScalar(50),
232 SkIntToScalar(20), SkIntToScalar(80));
233 canvas->drawPath(path, paint);
237 // Monotone test 2 (point at the top)
238 void test_monotone_2(SkCanvas* canvas, const SkPaint& paint) {
241 canvas->translate(100, 300);
242 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
243 path.lineTo(SkIntToScalar(80), SkIntToScalar(30));
244 path.quadTo(SkIntToScalar(20), SkIntToScalar(20),
245 SkIntToScalar(20), SkIntToScalar(80));
246 canvas->drawPath(path, paint);
250 // Monotone test 3 (point at the bottom)
251 void test_monotone_3(SkCanvas* canvas, const SkPaint& paint) {
254 canvas->translate(200, 300);
255 path.moveTo(SkIntToScalar(20), SkIntToScalar(80));
256 path.lineTo(SkIntToScalar(80), SkIntToScalar(70));
257 path.quadTo(SkIntToScalar(20), SkIntToScalar(80),
258 SkIntToScalar(20), SkIntToScalar(20));
259 canvas->drawPath(path, paint);
263 // Monotone test 4 (merging of two monotones)
264 void test_monotone_4(SkCanvas* canvas, const SkPaint& paint) {
267 canvas->translate(300, 300);
274 canvas->drawPath(path, paint);
278 // Monotone test 5 (aborted merging of two monotones)
279 void test_monotone_5(SkCanvas* canvas, const SkPaint& paint) {
282 canvas->translate(0, 400);
287 canvas->drawPath(path, paint);
290 // Degenerate intersection test
291 void test_degenerate(SkCanvas* canvas, const SkPaint& paint) {
294 canvas->translate(100, 400);
301 canvas->drawPath(path, paint);
304 // Two triangles with a coincident edge.
305 void test_coincident_edge(SkCanvas* canvas, const SkPaint& paint) {
308 canvas->translate(200, 400);
318 canvas->drawPath(path, paint);
321 // Bowtie with a coincident triangle (one triangle vertex coincident with the
322 // bowtie's intersection).
323 void test_bowtie_coincident_triangle(SkCanvas* canvas, const SkPaint& paint) {
326 canvas->translate(300, 400);
327 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
328 path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
329 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
330 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
331 path.moveTo(SkIntToScalar(50), SkIntToScalar(50));
332 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
333 path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
334 canvas->drawPath(path, paint);
338 // Coincident edges (big ones first, coincident vert on top).
339 void test_coincident_edges_1(SkCanvas* canvas, const SkPaint& paint) {
342 canvas->translate(0, 500);
343 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
344 path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
345 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
346 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
347 path.lineTo(SkIntToScalar(50), SkIntToScalar(50));
348 path.lineTo(SkIntToScalar(20), SkIntToScalar(50));
349 canvas->drawPath(path, paint);
352 // Coincident edges (small ones first, coincident vert on top).
353 void test_coincident_edges_2(SkCanvas* canvas, const SkPaint& paint) {
356 canvas->translate(100, 500);
357 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
358 path.lineTo(SkIntToScalar(50), SkIntToScalar(50));
359 path.lineTo(SkIntToScalar(20), SkIntToScalar(50));
360 path.moveTo(SkIntToScalar(20), SkIntToScalar(20));
361 path.lineTo(SkIntToScalar(80), SkIntToScalar(80));
362 path.lineTo(SkIntToScalar(20), SkIntToScalar(80));
363 canvas->drawPath(path, paint);
366 // Coincident edges (small ones first, coincident vert on bottom).
367 void test_coincident_edges_3(SkCanvas* canvas, const SkPaint& paint) {
370 canvas->translate(200, 500);
371 path.moveTo(SkIntToScalar(20), SkIntToScalar(80));
372 path.lineTo(SkIntToScalar(20), SkIntToScalar(50));
373 path.lineTo(SkIntToScalar(50), SkIntToScalar(50));
374 path.moveTo(SkIntToScalar(20), SkIntToScalar(80));
375 path.lineTo(SkIntToScalar(20), SkIntToScalar(20));
376 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
377 canvas->drawPath(path, paint);
380 // Coincident edges (big ones first, coincident vert on bottom).
381 void test_coincident_edges_4(SkCanvas* canvas, const SkPaint& paint) {
384 canvas->translate(300, 500);
385 path.moveTo(SkIntToScalar(20), SkIntToScalar(80));
386 path.lineTo(SkIntToScalar(20), SkIntToScalar(20));
387 path.lineTo(SkIntToScalar(80), SkIntToScalar(20));
388 path.moveTo(SkIntToScalar(20), SkIntToScalar(80));
389 path.lineTo(SkIntToScalar(20), SkIntToScalar(50));
390 path.lineTo(SkIntToScalar(50), SkIntToScalar(50));
391 canvas->drawPath(path, paint);
397 DEF_SIMPLE_GM(concavepaths, canvas, 500, 600) {
400 paint.setAntiAlias(true);
401 paint.setStyle(SkPaint::kFill_Style);
403 test_concave(canvas, paint);
404 test_reverse_concave(canvas, paint);
405 test_bowtie(canvas, paint);
406 test_fake_bowtie(canvas, paint);
407 test_intruding_vertex(canvas, paint);
408 test_fish(canvas, paint);
409 test_fast_forward(canvas, paint);
410 test_hole(canvas, paint);
411 test_star(canvas, paint);
412 test_inversion_repeat_vertex(canvas, paint);
413 test_stairstep(canvas, paint);
414 test_stairstep2(canvas, paint);
415 test_overlapping(canvas, paint);
416 test_partners(canvas, paint);
417 test_monotone_1(canvas, paint);
418 test_monotone_2(canvas, paint);
419 test_monotone_3(canvas, paint);
420 test_monotone_4(canvas, paint);
421 test_monotone_5(canvas, paint);
422 test_degenerate(canvas, paint);
423 test_coincident_edge(canvas, paint);
424 test_bowtie_coincident_triangle(canvas, paint);
425 test_coincident_edges_1(canvas, paint);
426 test_coincident_edges_2(canvas, paint);
427 test_coincident_edges_3(canvas, paint);
428 test_coincident_edges_4(canvas, paint);