1 /*
2 * Copyright 2015 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8 #include "gm/gm.h"
9 #include "include/core/SkCanvas.h"
10 #include "include/core/SkPaint.h"
11 #include "include/core/SkPathBuilder.h"
12 #include "include/core/SkRect.h"
13 #include "include/core/SkScalar.h"
14 #include "include/core/SkSize.h"
15 #include "include/core/SkString.h"
16 #include "include/core/SkTypes.h"
17 #include <tuple>
18
19 namespace {
20 struct PathDY {
21 SkPath path;
22 SkScalar dy;
23 };
24 }
25
26 typedef PathDY (*MakePathProc)();
27
make_triangle()28 static PathDY make_triangle() {
29 constexpr int gCoord[] = {
30 10, 20, 15, 5, 30, 30
31 };
32 return {
33 SkPathBuilder().moveTo(SkIntToScalar(gCoord[0]), SkIntToScalar(gCoord[1]))
34 .lineTo(SkIntToScalar(gCoord[2]), SkIntToScalar(gCoord[3]))
35 .lineTo(SkIntToScalar(gCoord[4]), SkIntToScalar(gCoord[5]))
36 .close()
37 .offset(10, 0)
38 .detach(),
39 30
40 };
41 }
42
make_rect()43 static PathDY make_rect() {
44 SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
45 SkIntToScalar(30), SkIntToScalar(30) };
46 return {
47 SkPath::Rect(r.makeOffset(10, 0)),
48 30
49 };
50 }
51
make_oval()52 static PathDY make_oval() {
53 SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
54 SkIntToScalar(30), SkIntToScalar(30) };
55 return {
56 SkPath::Oval(r.makeOffset(10, 0)),
57 30
58 };
59 }
60
make_star(int n)61 static PathDY make_star(int n) {
62 const SkScalar c = SkIntToScalar(45);
63 const SkScalar r = SkIntToScalar(20);
64
65 SkScalar rad = -SK_ScalarPI / 2;
66 const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;
67
68 SkPathBuilder b;
69 b.moveTo(c, c - r);
70 for (int i = 1; i < n; i++) {
71 rad += drad;
72 b.lineTo(c + SkScalarCos(rad) * r, c + SkScalarSin(rad) * r);
73 }
74 b.close();
75 return { b.detach(), r * 2 * 6 / 5 };
76 }
77
make_star_5()78 static PathDY make_star_5() { return make_star(5); }
make_star_13()79 static PathDY make_star_13() { return make_star(13); }
80
make_three_line()81 static PathDY make_three_line() {
82 static SkScalar xOffset = 34.f;
83 static SkScalar yOffset = 50.f;
84 SkPathBuilder b;
85 b.moveTo(-32.5f + xOffset, 0.0f + yOffset);
86 b.lineTo(32.5f + xOffset, 0.0f + yOffset);
87
88 b.moveTo(-32.5f + xOffset, 19 + yOffset);
89 b.lineTo(32.5f + xOffset, 19 + yOffset);
90
91 b.moveTo(-32.5f + xOffset, -19 + yOffset);
92 b.lineTo(32.5f + xOffset, -19 + yOffset);
93 b.lineTo(-32.5f + xOffset, -19 + yOffset);
94
95 b.close();
96
97 return { b.detach(), 70 };
98 }
99
make_arrow()100 static PathDY make_arrow() {
101 static SkScalar xOffset = 34.f;
102 static SkScalar yOffset = 40.f;
103 SkPathBuilder b;
104 b.moveTo(-26.f + xOffset, 0.0f + yOffset);
105 b.lineTo(26.f + xOffset, 0.0f + yOffset);
106
107 b.moveTo(-28.f + xOffset, -2.4748745f + yOffset);
108 b.lineTo(0 + xOffset, 25.525126f + yOffset);
109
110 b.moveTo(-28.f + xOffset, 2.4748745f + yOffset);
111 b.lineTo(0 + xOffset, -25.525126f + yOffset);
112 b.lineTo(-28.f + xOffset, 2.4748745f + yOffset);
113
114 b.close();
115
116 return { b.detach(), 70 };
117 }
118
make_curve()119 static PathDY make_curve() {
120 static SkScalar xOffset = -382.f;
121 static SkScalar yOffset = -50.f;
122 SkPathBuilder b;
123 b.moveTo(491 + xOffset, 56 + yOffset);
124 b.conicTo(435.93292f + xOffset, 56.000031f + yOffset,
125 382.61078f + xOffset, 69.752716f + yOffset,
126 0.9920463f);
127
128 return { b.detach(), 40 };
129 }
130
make_battery()131 static PathDY make_battery() {
132 static SkScalar xOffset = 5.0f;
133
134 SkPathBuilder b;
135 b.moveTo(24.67f + xOffset, 0.33000004f);
136 b.lineTo(8.3299999f + xOffset, 0.33000004f);
137 b.lineTo(8.3299999f + xOffset, 5.3299999f);
138 b.lineTo(0.33000004f + xOffset, 5.3299999f);
139 b.lineTo(0.33000004f + xOffset, 50.669998f);
140 b.lineTo(32.669998f + xOffset, 50.669998f);
141 b.lineTo(32.669998f + xOffset, 5.3299999f);
142 b.lineTo(24.67f + xOffset, 5.3299999f);
143 b.lineTo(24.67f + xOffset, 0.33000004f);
144 b.close();
145
146 b.moveTo(25.727224f + xOffset, 12.886665f);
147 b.lineTo(10.907918f + xOffset, 12.886665f);
148 b.lineTo(7.5166659f + xOffset, 28.683645f);
149 b.lineTo(14.810181f + xOffset, 28.683645f);
150 b.lineTo(7.7024879f + xOffset, 46.135998f);
151 b.lineTo(28.049999f + xOffset, 25.136419f);
152 b.lineTo(16.854223f + xOffset, 25.136419f);
153 b.lineTo(25.727224f + xOffset, 12.886665f);
154 b.close();
155 return { b.detach(), 50 };
156 }
157
make_battery2()158 static PathDY make_battery2() {
159 static SkScalar xOffset = 225.625f;
160
161 SkPathBuilder b;
162 b.moveTo(32.669998f + xOffset, 9.8640003f);
163 b.lineTo(0.33000004f + xOffset, 9.8640003f);
164 b.lineTo(0.33000004f + xOffset, 50.669998f);
165 b.lineTo(32.669998f + xOffset, 50.669998f);
166 b.lineTo(32.669998f + xOffset, 9.8640003f);
167 b.close();
168
169 b.moveTo(10.907918f + xOffset, 12.886665f);
170 b.lineTo(25.727224f + xOffset, 12.886665f);
171 b.lineTo(16.854223f + xOffset, 25.136419f);
172 b.lineTo(28.049999f + xOffset, 25.136419f);
173 b.lineTo(7.7024879f + xOffset, 46.135998f);
174 b.lineTo(14.810181f + xOffset, 28.683645f);
175 b.lineTo(7.5166659f + xOffset, 28.683645f);
176 b.lineTo(10.907918f + xOffset, 12.886665f);
177 b.close();
178
179 return { b.detach(), 60 };
180 }
181
make_ring()182 static PathDY make_ring() {
183 static SkScalar xOffset = 120;
184 static SkScalar yOffset = -270.f;
185
186 SkPathBuilder b;
187 b.setFillType(SkPathFillType::kWinding);
188 b.moveTo(xOffset + 144.859f, yOffset + 285.172f);
189 b.lineTo(xOffset + 144.859f, yOffset + 285.172f);
190 b.lineTo(xOffset + 144.859f, yOffset + 285.172f);
191 b.lineTo(xOffset + 143.132f, yOffset + 284.617f);
192 b.lineTo(xOffset + 144.859f, yOffset + 285.172f);
193 b.close();
194 b.moveTo(xOffset + 135.922f, yOffset + 286.844f);
195 b.lineTo(xOffset + 135.922f, yOffset + 286.844f);
196 b.lineTo(xOffset + 135.922f, yOffset + 286.844f);
197 b.lineTo(xOffset + 135.367f, yOffset + 288.571f);
198 b.lineTo(xOffset + 135.922f, yOffset + 286.844f);
199 b.close();
200 b.moveTo(xOffset + 135.922f, yOffset + 286.844f);
201 b.cubicTo(xOffset + 137.07f, yOffset + 287.219f, xOffset + 138.242f, yOffset + 287.086f,
202 xOffset + 139.242f, yOffset + 286.578f);
203 b.cubicTo(xOffset + 140.234f, yOffset + 286.078f, xOffset + 141.031f, yOffset + 285.203f,
204 xOffset + 141.406f, yOffset + 284.055f);
205 b.lineTo(xOffset + 144.859f, yOffset + 285.172f);
206 b.cubicTo(xOffset + 143.492f, yOffset + 289.375f, xOffset + 138.992f, yOffset + 291.656f,
207 xOffset + 134.797f, yOffset + 290.297f);
208 b.lineTo(xOffset + 135.922f, yOffset + 286.844f);
209 b.close();
210 b.moveTo(xOffset + 129.68f, yOffset + 280.242f);
211 b.lineTo(xOffset + 129.68f, yOffset + 280.242f);
212 b.lineTo(xOffset + 129.68f, yOffset + 280.242f);
213 b.lineTo(xOffset + 131.407f, yOffset + 280.804f);
214 b.lineTo(xOffset + 129.68f, yOffset + 280.242f);
215 b.close();
216 b.moveTo(xOffset + 133.133f, yOffset + 281.367f);
217 b.cubicTo(xOffset + 132.758f, yOffset + 282.508f, xOffset + 132.883f, yOffset + 283.687f,
218 xOffset + 133.391f, yOffset + 284.679f);
219 b.cubicTo(xOffset + 133.907f, yOffset + 285.679f, xOffset + 134.774f, yOffset + 286.468f,
220 xOffset + 135.922f, yOffset + 286.843f);
221 b.lineTo(xOffset + 134.797f, yOffset + 290.296f);
222 b.cubicTo(xOffset + 130.602f, yOffset + 288.929f, xOffset + 128.313f, yOffset + 284.437f,
223 xOffset + 129.68f, yOffset + 280.241f);
224 b.lineTo(xOffset + 133.133f, yOffset + 281.367f);
225 b.close();
226 b.moveTo(xOffset + 139.742f, yOffset + 275.117f);
227 b.lineTo(xOffset + 139.742f, yOffset + 275.117f);
228 b.lineTo(xOffset + 139.18f, yOffset + 276.844f);
229 b.lineTo(xOffset + 139.742f, yOffset + 275.117f);
230 b.close();
231 b.moveTo(xOffset + 138.609f, yOffset + 278.57f);
232 b.cubicTo(xOffset + 137.461f, yOffset + 278.203f, xOffset + 136.297f, yOffset + 278.328f,
233 xOffset + 135.297f, yOffset + 278.836f);
234 b.cubicTo(xOffset + 134.297f, yOffset + 279.344f, xOffset + 133.508f, yOffset + 280.219f,
235 xOffset + 133.133f, yOffset + 281.367f);
236 b.lineTo(xOffset + 129.68f, yOffset + 280.242f);
237 b.cubicTo(xOffset + 131.047f, yOffset + 276.039f, xOffset + 135.539f, yOffset + 273.758f,
238 xOffset + 139.742f, yOffset + 275.117f);
239 b.lineTo(xOffset + 138.609f, yOffset + 278.57f);
240 b.close();
241 b.moveTo(xOffset + 141.406f, yOffset + 284.055f);
242 b.cubicTo(xOffset + 141.773f, yOffset + 282.907f, xOffset + 141.648f, yOffset + 281.735f,
243 xOffset + 141.148f, yOffset + 280.735f);
244 b.cubicTo(xOffset + 140.625f, yOffset + 279.735f, xOffset + 139.757f, yOffset + 278.946f,
245 xOffset + 138.609f, yOffset + 278.571f);
246 b.lineTo(xOffset + 139.742f, yOffset + 275.118f);
247 b.cubicTo(xOffset + 143.937f, yOffset + 276.493f, xOffset + 146.219f, yOffset + 280.977f,
248 xOffset + 144.859f, yOffset + 285.173f);
249 b.lineTo(xOffset + 141.406f, yOffset + 284.055f);
250 b.close();
251
252 // uncomment to reveal PathOps bug, see https://bugs.chromium.org/p/skia/issues/detail?id=9732
253 // (void) Simplify(*path, path);
254
255 return { b.detach(), 15 };
256 }
257
258 constexpr MakePathProc gProcs[] = {
259 make_triangle,
260 make_rect,
261 make_oval,
262 make_star_5,
263 make_star_13,
264 make_three_line,
265 make_arrow,
266 make_curve,
267 make_battery,
268 make_battery2,
269 make_ring
270 };
271
272 constexpr SkScalar gWidths[] = {
273 2.0f,
274 3.0f,
275 4.0f,
276 5.0f,
277 6.0f,
278 7.0f,
279 7.0f,
280 14.0f,
281 0.0f,
282 0.0f,
283 0.0f
284 };
285 static_assert(std::size(gWidths) == std::size(gProcs));
286
287 constexpr SkScalar gMiters[] = {
288 2.0f,
289 3.0f,
290 3.0f,
291 3.0f,
292 4.0f,
293 4.0f,
294 4.0f,
295 4.0f,
296 4.0f,
297 4.0f,
298 4.0f,
299 };
300 static_assert(std::size(gMiters) == std::size(gProcs));
301
302 constexpr SkScalar gXTranslate[] = {
303 0.0f,
304 0.0f,
305 0.0f,
306 0.0f,
307 0.0f,
308 0.0f,
309 0.0f,
310 0.0f,
311 -220.625f,
312 0.0f,
313 0.0f,
314 };
315 static_assert(std::size(gXTranslate) == std::size(gProcs));
316
317 #define N std::size(gProcs)
318
319 // This GM tests out drawing small paths (i.e., for Ganesh, using the Distance
320 // Field path renderer) which are filled, stroked and filledAndStroked. In
321 // particular this ensures that any cache keys in use include the stroking
322 // parameters.
323 class SmallPathsGM : public skiagm::GM {
324 SkPath fPath[N];
325 SkScalar fDY[N];
326 protected:
onOnceBeforeDraw()327 void onOnceBeforeDraw() override {
328 for (size_t i = 0; i < N; i++) {
329 auto [path, dy] = gProcs[i]();
330 fPath[i] = path;
331 fDY[i] = dy;
332 }
333 }
334
getName() const335 SkString getName() const override { return SkString("smallpaths"); }
336
getISize()337 SkISize getISize() override { return SkISize::Make(640, 512); }
338
onDraw(SkCanvas * canvas)339 void onDraw(SkCanvas* canvas) override {
340 SkPaint paint;
341 paint.setAntiAlias(true);
342
343 // first column: filled paths
344 canvas->save();
345 for (size_t i = 0; i < N; i++) {
346 canvas->drawPath(fPath[i], paint);
347 canvas->translate(gXTranslate[i], fDY[i]);
348 }
349 canvas->restore();
350 canvas->translate(SkIntToScalar(120), SkIntToScalar(0));
351
352 // second column: stroked paths
353 canvas->save();
354 paint.setStyle(SkPaint::kStroke_Style);
355 paint.setStrokeCap(SkPaint::kButt_Cap);
356 for (size_t i = 0; i < N; i++) {
357 paint.setStrokeWidth(gWidths[i]);
358 paint.setStrokeMiter(gMiters[i]);
359 canvas->drawPath(fPath[i], paint);
360 canvas->translate(gXTranslate[i], fDY[i]);
361 }
362 canvas->restore();
363 canvas->translate(SkIntToScalar(120), SkIntToScalar(0));
364
365 // third column: stroked paths with different widths
366 canvas->save();
367 paint.setStyle(SkPaint::kStroke_Style);
368 paint.setStrokeCap(SkPaint::kButt_Cap);
369 for (size_t i = 0; i < N; i++) {
370 paint.setStrokeWidth(gWidths[i] + 2.0f);
371 paint.setStrokeMiter(gMiters[i]);
372 canvas->drawPath(fPath[i], paint);
373 canvas->translate(gXTranslate[i], fDY[i]);
374 }
375 canvas->restore();
376 canvas->translate(SkIntToScalar(120), SkIntToScalar(0));
377
378 // fourth column: stroked and filled paths
379 paint.setStyle(SkPaint::kStrokeAndFill_Style);
380 paint.setStrokeCap(SkPaint::kButt_Cap);
381 for (size_t i = 0; i < N; i++) {
382 paint.setStrokeWidth(gWidths[i]);
383 paint.setStrokeMiter(gMiters[i]);
384 canvas->drawPath(fPath[i], paint);
385 canvas->translate(gXTranslate[i], fDY[i]);
386 }
387
388 }
389
390 private:
391 using INHERITED = skiagm::GM;
392 };
393
394 DEF_GM(return new SmallPathsGM;)
395