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.h"
9 #include "SkPath.h"
10
11 typedef SkScalar (*MakePathProc)(SkPath*);
12
make_triangle(SkPath * path)13 static SkScalar make_triangle(SkPath* path) {
14 constexpr int gCoord[] = {
15 10, 20, 15, 5, 30, 30
16 };
17 path->moveTo(SkIntToScalar(gCoord[0]), SkIntToScalar(gCoord[1]));
18 path->lineTo(SkIntToScalar(gCoord[2]), SkIntToScalar(gCoord[3]));
19 path->lineTo(SkIntToScalar(gCoord[4]), SkIntToScalar(gCoord[5]));
20 path->close();
21 path->offset(SkIntToScalar(10), SkIntToScalar(0));
22 return SkIntToScalar(30);
23 }
24
make_rect(SkPath * path)25 static SkScalar make_rect(SkPath* path) {
26 SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
27 SkIntToScalar(30), SkIntToScalar(30) };
28 path->addRect(r);
29 path->offset(SkIntToScalar(10), SkIntToScalar(0));
30 return SkIntToScalar(30);
31 }
32
make_oval(SkPath * path)33 static SkScalar make_oval(SkPath* path) {
34 SkRect r = { SkIntToScalar(10), SkIntToScalar(10),
35 SkIntToScalar(30), SkIntToScalar(30) };
36 path->addOval(r);
37 path->offset(SkIntToScalar(10), SkIntToScalar(0));
38 return SkIntToScalar(30);
39 }
40
make_star(SkPath * path,int n)41 static SkScalar make_star(SkPath* path, int n) {
42 const SkScalar c = SkIntToScalar(45);
43 const SkScalar r = SkIntToScalar(20);
44
45 SkScalar rad = -SK_ScalarPI / 2;
46 const SkScalar drad = (n >> 1) * SK_ScalarPI * 2 / n;
47
48 path->moveTo(c, c - r);
49 for (int i = 1; i < n; i++) {
50 rad += drad;
51 SkScalar cosV, sinV = SkScalarSinCos(rad, &cosV);
52 path->lineTo(c + cosV * r, c + sinV * r);
53 }
54 path->close();
55 return r * 2 * 6 / 5;
56 }
57
make_star_5(SkPath * path)58 static SkScalar make_star_5(SkPath* path) { return make_star(path, 5); }
make_star_13(SkPath * path)59 static SkScalar make_star_13(SkPath* path) { return make_star(path, 13); }
60
make_three_line(SkPath * path)61 static SkScalar make_three_line(SkPath* path) {
62 static SkScalar xOffset = 34.f;
63 static SkScalar yOffset = 50.f;
64 path->moveTo(-32.5f + xOffset, 0.0f + yOffset);
65 path->lineTo(32.5f + xOffset, 0.0f + yOffset);
66
67 path->moveTo(-32.5f + xOffset, 19 + yOffset);
68 path->lineTo(32.5f + xOffset, 19 + yOffset);
69
70 path->moveTo(-32.5f + xOffset, -19 + yOffset);
71 path->lineTo(32.5f + xOffset, -19 + yOffset);
72 path->lineTo(-32.5f + xOffset, -19 + yOffset);
73
74 path->close();
75
76 return SkIntToScalar(70);
77 }
78
make_arrow(SkPath * path)79 static SkScalar make_arrow(SkPath* path) {
80 static SkScalar xOffset = 34.f;
81 static SkScalar yOffset = 40.f;
82 path->moveTo(-26.f + xOffset, 0.0f + yOffset);
83 path->lineTo(26.f + xOffset, 0.0f + yOffset);
84
85 path->moveTo(-28.f + xOffset, -2.4748745f + yOffset);
86 path->lineTo(0 + xOffset, 25.525126f + yOffset);
87
88 path->moveTo(-28.f + xOffset, 2.4748745f + yOffset);
89 path->lineTo(0 + xOffset, -25.525126f + yOffset);
90 path->lineTo(-28.f + xOffset, 2.4748745f + yOffset);
91
92 path->close();
93
94 return SkIntToScalar(70);
95 }
96
make_curve(SkPath * path)97 static SkScalar make_curve(SkPath* path) {
98 static SkScalar xOffset = -382.f;
99 static SkScalar yOffset = -50.f;
100 path->moveTo(491 + xOffset, 56 + yOffset);
101 path->conicTo(435.93292f + xOffset, 56.000031f + yOffset,
102 382.61078f + xOffset, 69.752716f + yOffset,
103 0.9920463f);
104
105 return SkIntToScalar(40);
106 }
107
make_battery(SkPath * path)108 static SkScalar make_battery(SkPath* path) {
109 static SkScalar xOffset = 5.0f;
110
111 path->moveTo(24.67f + xOffset, 0.33000004f);
112 path->lineTo(8.3299999f + xOffset, 0.33000004f);
113 path->lineTo(8.3299999f + xOffset, 5.3299999f);
114 path->lineTo(0.33000004f + xOffset, 5.3299999f);
115 path->lineTo(0.33000004f + xOffset, 50.669998f);
116 path->lineTo(32.669998f + xOffset, 50.669998f);
117 path->lineTo(32.669998f + xOffset, 5.3299999f);
118 path->lineTo(24.67f + xOffset, 5.3299999f);
119 path->lineTo(24.67f + xOffset, 0.33000004f);
120 path->close();
121
122 path->moveTo(25.727224f + xOffset, 12.886665f);
123 path->lineTo(10.907918f + xOffset, 12.886665f);
124 path->lineTo(7.5166659f + xOffset, 28.683645f);
125 path->lineTo(14.810181f + xOffset, 28.683645f);
126 path->lineTo(7.7024879f + xOffset, 46.135998f);
127 path->lineTo(28.049999f + xOffset, 25.136419f);
128 path->lineTo(16.854223f + xOffset, 25.136419f);
129 path->lineTo(25.727224f + xOffset, 12.886665f);
130 path->close();
131 return SkIntToScalar(50);
132 }
133
make_battery2(SkPath * path)134 static SkScalar make_battery2(SkPath* path) {
135 static SkScalar xOffset = 225.625f;
136
137 path->moveTo(32.669998f + xOffset, 9.8640003f);
138 path->lineTo(0.33000004f + xOffset, 9.8640003f);
139 path->lineTo(0.33000004f + xOffset, 50.669998f);
140 path->lineTo(32.669998f + xOffset, 50.669998f);
141 path->lineTo(32.669998f + xOffset, 9.8640003f);
142 path->close();
143
144 path->moveTo(10.907918f + xOffset, 12.886665f);
145 path->lineTo(25.727224f + xOffset, 12.886665f);
146 path->lineTo(16.854223f + xOffset, 25.136419f);
147 path->lineTo(28.049999f + xOffset, 25.136419f);
148 path->lineTo(7.7024879f + xOffset, 46.135998f);
149 path->lineTo(14.810181f + xOffset, 28.683645f);
150 path->lineTo(7.5166659f + xOffset, 28.683645f);
151 path->lineTo(10.907918f + xOffset, 12.886665f);
152 path->close();
153
154 return SkIntToScalar(70);
155 }
156
157 constexpr MakePathProc gProcs[] = {
158 make_triangle,
159 make_rect,
160 make_oval,
161 make_star_5,
162 make_star_13,
163 make_three_line,
164 make_arrow,
165 make_curve,
166 make_battery,
167 make_battery2
168 };
169
170 constexpr SkScalar gWidths[] = {
171 2.0f,
172 3.0f,
173 4.0f,
174 5.0f,
175 6.0f,
176 7.0f,
177 7.0f,
178 14.0f,
179 0.0f,
180 0.0f,
181 };
182
183 constexpr SkScalar gMiters[] = {
184 2.0f,
185 3.0f,
186 3.0f,
187 3.0f,
188 4.0f,
189 4.0f,
190 4.0f,
191 4.0f,
192 4.0f,
193 4.0f,
194 };
195
196 constexpr SkScalar gXTranslate[] = {
197 0.0f,
198 0.0f,
199 0.0f,
200 0.0f,
201 0.0f,
202 0.0f,
203 0.0f,
204 0.0f,
205 -220.625f,
206 0.0f,
207 };
208
209 #define N SK_ARRAY_COUNT(gProcs)
210
211 // This GM tests out drawing small paths (i.e., for Ganesh, using the Distance
212 // Field path renderer) which are filled, stroked and filledAndStroked. In
213 // particular this ensures that any cache keys in use include the stroking
214 // parameters.
215 class SmallPathsGM : public skiagm::GM {
216 SkPath fPath[N];
217 SkScalar fDY[N];
218 protected:
onOnceBeforeDraw()219 void onOnceBeforeDraw() override {
220 for (size_t i = 0; i < N; i++) {
221 fDY[i] = gProcs[i](&fPath[i]);
222 }
223 }
224
onShortName()225 SkString onShortName() override {
226 return SkString("smallpaths");
227 }
228
onISize()229 SkISize onISize() override {
230 return SkISize::Make(640, 480);
231 }
232
onDraw(SkCanvas * canvas)233 void onDraw(SkCanvas* canvas) override {
234 SkPaint paint;
235 paint.setAntiAlias(true);
236
237 // first column: filled paths
238 canvas->save();
239 for (size_t i = 0; i < N; i++) {
240 canvas->drawPath(fPath[i], paint);
241 canvas->translate(gXTranslate[i], fDY[i]);
242 }
243 canvas->restore();
244 canvas->translate(SkIntToScalar(120), SkIntToScalar(0));
245
246 // second column: stroked paths
247 canvas->save();
248 paint.setStyle(SkPaint::kStroke_Style);
249 paint.setStrokeCap(SkPaint::kButt_Cap);
250 for (size_t i = 0; i < N; i++) {
251 paint.setStrokeWidth(gWidths[i]);
252 paint.setStrokeMiter(gMiters[i]);
253 canvas->drawPath(fPath[i], paint);
254 canvas->translate(gXTranslate[i], fDY[i]);
255 }
256 canvas->restore();
257 canvas->translate(SkIntToScalar(120), SkIntToScalar(0));
258
259 // third column: stroked paths with different widths
260 canvas->save();
261 paint.setStyle(SkPaint::kStroke_Style);
262 paint.setStrokeCap(SkPaint::kButt_Cap);
263 for (size_t i = 0; i < N; i++) {
264 paint.setStrokeWidth(gWidths[i] + 2.0f);
265 paint.setStrokeMiter(gMiters[i]);
266 canvas->drawPath(fPath[i], paint);
267 canvas->translate(gXTranslate[i], fDY[i]);
268 }
269 canvas->restore();
270 canvas->translate(SkIntToScalar(120), SkIntToScalar(0));
271
272 // fourth column: stroked and filled paths
273 paint.setStyle(SkPaint::kStrokeAndFill_Style);
274 paint.setStrokeCap(SkPaint::kButt_Cap);
275 for (size_t i = 0; i < N; i++) {
276 paint.setStrokeWidth(gWidths[i]);
277 paint.setStrokeMiter(gMiters[i]);
278 canvas->drawPath(fPath[i], paint);
279 canvas->translate(gXTranslate[i], fDY[i]);
280 }
281
282 }
283
284 private:
285 typedef skiagm::GM INHERITED;
286 };
287
288 DEF_GM(return new SmallPathsGM;)
289