blob: f52e48b829329bac5dc7af39486eeeafdcd40a15 [file] [log] [blame]
reed@google.com9f72d542012-09-08 16:52:23 +00001
2/*
3 * Copyright 2012 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8#include "gm.h"
9
10#include "SkColorPriv.h"
11#include "SkGeometry.h"
12#include "SkShader.h"
13
mike@reedtribe.org396948b2012-09-10 01:01:51 +000014#define WIRE_FRAME_WIDTH 1.1f
15
reed@google.com9f72d542012-09-08 16:52:23 +000016static void tesselate(const SkPath& src, SkPath* dst) {
17 SkPath::Iter iter(src, true);
18 SkPoint pts[4];
19 SkPath::Verb verb;
20 while ((verb = iter.next(pts)) != SkPath::kDone_Verb) {
21 switch (verb) {
22 case SkPath::kMove_Verb:
23 dst->moveTo(pts[0]);
24 break;
25 case SkPath::kLine_Verb:
26 dst->lineTo(pts[1]);
27 break;
28 case SkPath::kQuad_Verb: {
29 SkPoint p;
30 for (int i = 1; i <= 8; ++i) {
31 SkEvalQuadAt(pts, i / 8.0f, &p, NULL);
32 dst->lineTo(p);
33 }
34 } break;
35 case SkPath::kCubic_Verb: {
36 SkPoint p;
37 for (int i = 1; i <= 8; ++i) {
38 SkEvalCubicAt(pts, i / 8.0f, &p, NULL, NULL);
39 dst->lineTo(p);
40 }
41 } break;
42 }
43 }
44}
45
46static void setFade(SkPaint* paint, bool showGL) {
47 paint->setAlpha(showGL ? 0x66 : 0xFF);
48}
49
50static void setGLFrame(SkPaint* paint) {
51 paint->setColor(0xFFFF0000);
52 paint->setStyle(SkPaint::kStroke_Style);
53 paint->setAntiAlias(true);
mike@reedtribe.org396948b2012-09-10 01:01:51 +000054 paint->setStrokeWidth(WIRE_FRAME_WIDTH);
reed@google.com9f72d542012-09-08 16:52:23 +000055}
56
57static void show_mesh(SkCanvas* canvas, const SkRect& r) {
58 SkPaint paint;
59 setGLFrame(&paint);
skia.committer@gmail.com3590a242012-09-09 02:01:52 +000060
reed@google.com9f72d542012-09-08 16:52:23 +000061 canvas->drawRect(r, paint);
62 canvas->drawLine(r.fLeft, r.fTop, r.fRight, r.fBottom, paint);
63}
64
65static void drawLine(SkCanvas* canvas, const SkPoint& p0, const SkPoint& p1,
66 const SkPaint& paint) {
67 canvas->drawLine(p0.fX, p0.fY, p1.fX, p1.fY, paint);
68}
69
70static void show_mesh(SkCanvas* canvas, const SkPoint pts[],
71 const uint16_t indices[], int count) {
72 SkPaint paint;
73 setGLFrame(&paint);
74
75 for (int i = 0; i < count - 2; ++i) {
76 drawLine(canvas, pts[indices[i]], pts[indices[i+1]], paint);
77 drawLine(canvas, pts[indices[i+1]], pts[indices[i+2]], paint);
78 drawLine(canvas, pts[indices[i+2]], pts[indices[i]], paint);
79 }
80}
81
82static void show_glframe(SkCanvas* canvas, const SkPath& path) {
83 SkPaint paint;
84 setGLFrame(&paint);
85 canvas->drawPath(path, paint);
86}
87
88static void show_mesh_between(SkCanvas* canvas, const SkPath& p0, const SkPath& p1) {
89 SkPath d0, d1;
90 tesselate(p0, &d0);
91 tesselate(p1, &d1);
skia.committer@gmail.com3590a242012-09-09 02:01:52 +000092
reed@google.com9f72d542012-09-08 16:52:23 +000093 SkPoint pts0[256*2], pts1[256];
94 int count = d0.getPoints(pts0, SK_ARRAY_COUNT(pts0));
95 int count1 = d1.getPoints(pts1, SK_ARRAY_COUNT(pts1));
96 SkASSERT(count == count1);
97 memcpy(&pts0[count], pts1, count * sizeof(SkPoint));
skia.committer@gmail.com3590a242012-09-09 02:01:52 +000098
reed@google.com9f72d542012-09-08 16:52:23 +000099 uint16_t indices[256*6];
100 uint16_t* ndx = indices;
101 for (int i = 0; i < count; ++i) {
102 *ndx++ = i;
103 *ndx++ = i + count;
104 }
105 *ndx++ = 0;
106
107 show_mesh(canvas, pts0, indices, ndx - indices);
108}
109
110static void show_fan(SkCanvas* canvas, const SkPath& path, SkScalar cx, SkScalar cy) {
111 SkPaint paint;
112 setGLFrame(&paint);
113
114 canvas->drawPath(path, paint);
115
116 SkPoint pts[256];
117 int count = path.getPoints(pts, SK_ARRAY_COUNT(pts));
118 for (int i = 0; i < count; ++i) {
119 canvas->drawLine(pts[i].fX, pts[i].fY, cx, cy, paint);
120 }
121}
122
123///////////////////////////////////////////////////////////////////////////////
124
125typedef void (*DrawProc)(SkCanvas* canvas, bool showGL, int flags);
126
127static void draw_line(SkCanvas* canvas, bool showGL, int flags) {
128 SkPaint paint;
129 paint.setAntiAlias(true);
skia.committer@gmail.com3590a242012-09-09 02:01:52 +0000130
mike@reedtribe.org396948b2012-09-10 01:01:51 +0000131 if (showGL) {
132 setGLFrame(&paint);
133 }
reed@google.com9f72d542012-09-08 16:52:23 +0000134 canvas->drawLine(50, 50, 400, 100, paint);
mike@reedtribe.org396948b2012-09-10 01:01:51 +0000135 paint.setColor(SK_ColorBLACK);
skia.committer@gmail.com3590a242012-09-09 02:01:52 +0000136
reed@google.com9f72d542012-09-08 16:52:23 +0000137 canvas->rotate(40);
138 setFade(&paint, showGL);
139 paint.setStrokeWidth(40);
140 canvas->drawLine(100, 50, 450, 50, paint);
141 if (showGL) {
142 show_mesh(canvas, SkRect::MakeLTRB(100, 50-20, 450, 50+20));
143 }
144}
145
146static void draw_rect(SkCanvas* canvas, bool showGL, int flags) {
147 SkPaint paint;
148 paint.setAntiAlias(true);
149
reed@google.comb5671782012-09-08 20:00:36 +0000150 SkRect r = SkRect::MakeLTRB(50, 70, 250, 370);
reed@google.com9f72d542012-09-08 16:52:23 +0000151
152 setFade(&paint, showGL);
153 canvas->drawRect(r, paint);
154 if (showGL) {
155 show_mesh(canvas, r);
156 }
157
158 canvas->translate(320, 0);
159
160 paint.setStyle(SkPaint::kStroke_Style);
161 paint.setStrokeWidth(25);
162 canvas->drawRect(r, paint);
163 if (showGL) {
164 SkScalar rad = paint.getStrokeWidth() / 2;
165 SkPoint pts[8];
166 r.outset(rad, rad);
167 r.toQuad(&pts[0]);
168 r.inset(rad*2, rad*2);
169 r.toQuad(&pts[4]);
skia.committer@gmail.com3590a242012-09-09 02:01:52 +0000170
reed@google.com9f72d542012-09-08 16:52:23 +0000171 const uint16_t indices[] = {
172 0, 4, 1, 5, 2, 6, 3, 7, 0, 4
173 };
174 show_mesh(canvas, pts, indices, SK_ARRAY_COUNT(indices));
175 }
176}
177
178static void draw_oval(SkCanvas* canvas, bool showGL, int flags) {
179 SkPaint paint;
180 paint.setAntiAlias(true);
skia.committer@gmail.com3590a242012-09-09 02:01:52 +0000181
reed@google.comb5671782012-09-08 20:00:36 +0000182 SkRect r = SkRect::MakeLTRB(50, 70, 250, 370);
skia.committer@gmail.com3590a242012-09-09 02:01:52 +0000183
reed@google.com9f72d542012-09-08 16:52:23 +0000184 setFade(&paint, showGL);
185 canvas->drawOval(r, paint);
186 if (showGL) {
187 switch (flags) {
188 case 0: {
189 SkPath path;
190 path.addOval(r);
191 show_glframe(canvas, path);
192 } break;
reed@google.comb5671782012-09-08 20:00:36 +0000193 case 1:
mike@reedtribe.org396948b2012-09-10 01:01:51 +0000194 case 3: {
reed@google.com9f72d542012-09-08 16:52:23 +0000195 SkPath src, dst;
196 src.addOval(r);
197 tesselate(src, &dst);
198 show_fan(canvas, dst, r.centerX(), r.centerY());
199 } break;
mike@reedtribe.org396948b2012-09-10 01:01:51 +0000200 case 2: {
201 SkPaint p(paint);
202 show_mesh(canvas, r);
203 setGLFrame(&p);
204 paint.setStyle(SkPaint::kFill_Style);
205 canvas->drawCircle(r.centerX(), r.centerY(), 3, p);
206 } break;
reed@google.com9f72d542012-09-08 16:52:23 +0000207 }
208 }
skia.committer@gmail.com3590a242012-09-09 02:01:52 +0000209
reed@google.com9f72d542012-09-08 16:52:23 +0000210 canvas->translate(320, 0);
skia.committer@gmail.com3590a242012-09-09 02:01:52 +0000211
reed@google.com9f72d542012-09-08 16:52:23 +0000212 paint.setStyle(SkPaint::kStroke_Style);
213 paint.setStrokeWidth(25);
214 canvas->drawOval(r, paint);
215 if (showGL) {
216 switch (flags) {
217 case 0: {
218 SkPath path;
219 SkScalar rad = paint.getStrokeWidth() / 2;
220 r.outset(rad, rad);
221 path.addOval(r);
222 r.inset(rad*2, rad*2);
223 path.addOval(r);
224 show_glframe(canvas, path);
225 } break;
226 case 1: {
227 SkPath path0, path1;
228 SkScalar rad = paint.getStrokeWidth() / 2;
229 r.outset(rad, rad);
230 path0.addOval(r);
231 r.inset(rad*2, rad*2);
232 path1.addOval(r);
233 show_mesh_between(canvas, path0, path1);
234 } break;
reed@google.comb5671782012-09-08 20:00:36 +0000235 case 2: {
mike@reedtribe.org396948b2012-09-10 01:01:51 +0000236 SkPath path;
237 path.addOval(r);
238 show_glframe(canvas, path);
239 SkScalar rad = paint.getStrokeWidth() / 2;
240 r.outset(rad, rad);
241 show_mesh(canvas, r);
242 } break;
243 case 3: {
reed@google.comb5671782012-09-08 20:00:36 +0000244 SkScalar rad = paint.getStrokeWidth() / 2;
245 r.outset(rad, rad);
246 SkPaint paint;
247 paint.setAlpha(0x33);
248 canvas->drawRect(r, paint);
249 show_mesh(canvas, r);
250 } break;
reed@google.com9f72d542012-09-08 16:52:23 +0000251 }
252 }
253}
254
reed@google.comb5671782012-09-08 20:00:36 +0000255#include "SkImageDecoder.h"
reed@google.com4bbec452012-09-10 11:50:26 +0000256
reed@google.com9f72d542012-09-08 16:52:23 +0000257static void draw_image(SkCanvas* canvas, bool showGL, int flags) {
258 SkPaint paint;
259 paint.setAntiAlias(true);
reed@google.comb5671782012-09-08 20:00:36 +0000260 paint.setFilterBitmap(true);
261 setFade(&paint, showGL);
262
reed@google.com4bbec452012-09-10 11:50:26 +0000263 static SkBitmap* gBM;
264 if (NULL == gBM) {
265 gBM = new SkBitmap;
266 SkImageDecoder::DecodeFile("/skimages/startrek.png", gBM);
267 }
268 SkRect r = SkRect::MakeWH(gBM->width(), gBM->height());
reed@google.comb5671782012-09-08 20:00:36 +0000269
270 canvas->save();
271 canvas->translate(30, 30);
272 canvas->scale(0.8f, 0.8f);
reed@google.com4bbec452012-09-10 11:50:26 +0000273 canvas->drawBitmap(*gBM, 0, 0, &paint);
reed@google.comb5671782012-09-08 20:00:36 +0000274 if (showGL) {
275 show_mesh(canvas, r);
276 }
277 canvas->restore();
278
279 canvas->translate(210, 290);
280 canvas->rotate(-35);
reed@google.com4bbec452012-09-10 11:50:26 +0000281 canvas->drawBitmap(*gBM, 0, 0, &paint);
reed@google.comb5671782012-09-08 20:00:36 +0000282 if (showGL) {
283 show_mesh(canvas, r);
284 }
reed@google.com9f72d542012-09-08 16:52:23 +0000285}
286
287static void draw_text(SkCanvas* canvas, bool showGL, int flags) {
288 SkPaint paint;
289 paint.setAntiAlias(true);
mike@reedtribe.orgad6aa5c2012-09-10 01:43:42 +0000290 paint.setLCDRenderText(true);
reed@google.comb5671782012-09-08 20:00:36 +0000291 const char text[] = "Graphics at Google";
292 size_t len = strlen(text);
293 setFade(&paint, showGL);
294
295 canvas->translate(40, 50);
296 for (int i = 0; i < 10; ++i) {
297 paint.setTextSize(12 + i * 3);
298 canvas->drawText(text, len, 0, 0, paint);
299 if (showGL) {
300 SkRect bounds[256];
301 SkScalar widths[256];
302 int count = paint.getTextWidths(text, len, widths, bounds);
303 SkScalar adv = 0;
304 for (int j = 0; j < count; ++j) {
305 bounds[j].offset(adv, 0);
306 show_mesh(canvas, bounds[j]);
307 adv += widths[j];
308 }
309 }
310 canvas->translate(0, paint.getTextSize() * 3 / 2);
311 }
reed@google.com9f72d542012-09-08 16:52:23 +0000312}
313
314static const struct {
315 DrawProc fProc;
316 const char* fName;
317} gRec[] = {
318 { draw_line, "Lines" },
319 { draw_rect, "Rects" },
320 { draw_oval, "Ovals" },
321 { draw_image, "Images" },
322 { draw_text, "Text" },
323};
324
325class TalkGM : public skiagm::GM {
326 DrawProc fProc;
327 SkString fName;
328 bool fShowGL;
329 int fFlags;
330
331public:
332 TalkGM(int index, bool showGL, int flags = 0) {
333 fProc = gRec[index].fProc;
334 fName.set(gRec[index].fName);
335 if (showGL) {
336 fName.append("-gl");
337 }
338 fShowGL = showGL;
339 fFlags = flags;
340 }
341
342protected:
343 virtual SkString onShortName() {
344 return fName;
345 }
346
347 virtual SkISize onISize() {
348 return SkISize::Make(640, 480);
349 }
350
351 virtual void onDraw(SkCanvas* canvas) {
reed@google.comef752fe2012-09-10 16:06:18 +0000352 SkISize size = canvas->getDeviceSize();
353 SkRect dst = SkRect::MakeWH(size.width(), size.height());
reed@google.com9f72d542012-09-08 16:52:23 +0000354 SkRect src = SkRect::MakeWH(640, 480);
355 SkMatrix matrix;
356 matrix.setRectToRect(src, dst, SkMatrix::kCenter_ScaleToFit);
skia.committer@gmail.com3590a242012-09-09 02:01:52 +0000357
reed@google.com9f72d542012-09-08 16:52:23 +0000358 canvas->concat(matrix);
359 fProc(canvas, fShowGL, fFlags);
360 }
361
362private:
363 typedef skiagm::GM INHERITED;
364};
365
366//////////////////////////////////////////////////////////////////////////////
367
368#define GM_CONCAT(X,Y) GM_CONCAT_IMPL(X,Y)
369#define GM_CONCAT_IMPL(X,Y) X##Y
370
371#define FACTORY_NAME GM_CONCAT(Factory, __LINE__)
372#define REGISTRY_NAME GM_CONCAT(gReg, __LINE__)
373
374#define ADD_GM(Class, args) \
375 static skiagm::GM* FACTORY_NAME(void*) { return new Class args; } \
376 static skiagm::GMRegistry REGISTRY_NAME(FACTORY_NAME);
377
378ADD_GM(TalkGM, (0, false))
379ADD_GM(TalkGM, (0, true))
380ADD_GM(TalkGM, (1, false))
381ADD_GM(TalkGM, (1, true))
382ADD_GM(TalkGM, (2, false))
383ADD_GM(TalkGM, (2, true))
384ADD_GM(TalkGM, (2, true, 1))
reed@google.comb5671782012-09-08 20:00:36 +0000385ADD_GM(TalkGM, (2, true, 2))
mike@reedtribe.org396948b2012-09-10 01:01:51 +0000386ADD_GM(TalkGM, (2, true, 3))
reed@google.com9f72d542012-09-08 16:52:23 +0000387ADD_GM(TalkGM, (3, false))
388ADD_GM(TalkGM, (3, true))
389ADD_GM(TalkGM, (4, false))
390ADD_GM(TalkGM, (4, true))
skia.committer@gmail.com3590a242012-09-09 02:01:52 +0000391
reed@google.com9f72d542012-09-08 16:52:23 +0000392//static GM* MyFactory(void*) { return new TalkGM(0, false); }
393//static GMRegistry reg(MyFactory);