1 /*
2 * Copyright 2011 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 #include "SampleCode.h"
8 #include "SkView.h"
9 #include "SkCanvas.h"
10 #include "SkGraphics.h"
11 #include "SkRandom.h"
12
13 #include <pthread.h>
14
call_measure()15 static void call_measure() {
16 SkPaint paint;
17 uint16_t text[32];
18 SkRandom rand;
19
20 paint.setAntiAlias(true);
21 paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
22 for (int j = 0; j < SK_ARRAY_COUNT(text); j++)
23 text[j] = (uint16_t)((rand.nextU() & 0xFF) + 32);
24
25 for (int i = 9; i < 36; i++) {
26 SkPaint::FontMetrics m;
27
28 paint.setTextSize(SkIntToScalar(i));
29 paint.getFontMetrics(&m);
30 paint.measureText(text, sizeof(text));
31 }
32 }
33
call_draw(SkCanvas * canvas)34 static void call_draw(SkCanvas* canvas) {
35 SkPaint paint;
36 uint16_t text[32];
37 SkRandom rand;
38
39 paint.setAntiAlias(true);
40 paint.setTextEncoding(SkPaint::kUTF16_TextEncoding);
41 for (int j = 0; j < SK_ARRAY_COUNT(text); j++)
42 text[j] = (uint16_t)((rand.nextU() & 0xFF) + 32);
43
44 SkScalar x = SkIntToScalar(10);
45 SkScalar y = SkIntToScalar(20);
46
47 canvas->drawColor(SK_ColorWHITE);
48 for (int i = 9; i < 36; i++)
49 {
50 SkPaint::FontMetrics m;
51
52 paint.setTextSize(SkIntToScalar(i));
53 paint.getFontMetrics(&m);
54 canvas->drawText(text, sizeof(text), x, y, paint);
55 y += m.fDescent - m.fAscent;
56 }
57 }
58
59 static bool gDone;
60
measure_proc(void * context)61 static void* measure_proc(void* context) {
62 while (!gDone) {
63 call_measure();
64 }
65 return nullptr;
66 }
67
draw_proc(void * context)68 static void* draw_proc(void* context) {
69 SkBitmap* bm = (SkBitmap*)context;
70 SkCanvas canvas(*bm);
71
72 while (!gDone) {
73 call_draw(&canvas);
74 }
75 return nullptr;
76 }
77
78 class FontCacheView : public SampleView {
79 public:
80 enum { N = 4 };
81
82 pthread_t fMThreads[N];
83 pthread_t fDThreads[N];
84 SkBitmap fBitmaps[N];
85
FontCacheView()86 FontCacheView() {
87 gDone = false;
88 for (int i = 0; i < N; i++) {
89 int status;
90
91 status = pthread_create(&fMThreads[i], nullptr, measure_proc, nullptr);
92 SkASSERT(0 == status);
93
94 fBitmaps[i].allocPixels(SkImageInfo::Make(320, 240,
95 kRGB_565_SkColorType,
96 kOpaque_SkAlphaType));
97 status = pthread_create(&fDThreads[i], nullptr, draw_proc, &fBitmaps[i]);
98 SkASSERT(0 == status);
99 }
100 this->setBGColor(0xFFDDDDDD);
101 }
102
~FontCacheView()103 virtual ~FontCacheView() {
104 gDone = true;
105 for (int i = 0; i < N; i++) {
106 void* ret;
107 int status = pthread_join(fMThreads[i], &ret);
108 SkASSERT(0 == status);
109 status = pthread_join(fDThreads[i], &ret);
110 SkASSERT(0 == status);
111 }
112 }
113
114 protected:
115 // overrides from SkEventSink
onQuery(SkEvent * evt)116 virtual bool onQuery(SkEvent* evt) {
117 if (SampleCode::TitleQ(*evt)) {
118 SampleCode::TitleR(evt, "FontCache");
119 return true;
120 }
121 return this->INHERITED::onQuery(evt);
122 }
123
onDrawContent(SkCanvas * canvas)124 virtual void onDrawContent(SkCanvas* canvas) {
125 SkScalar x = 0;
126 SkScalar y = 0;
127 for (int i = 0; i < N; i++) {
128 canvas->drawBitmap(fBitmaps[i], x, y);
129 x += SkIntToScalar(fBitmaps[i].width());
130 }
131 this->inval(nullptr);
132 }
133
134 private:
135 typedef SampleView INHERITED;
136 };
137
138 //////////////////////////////////////////////////////////////////////////////
139
MyFactory()140 static SkView* MyFactory() { return new FontCacheView; }
141 static SkViewRegister reg(MyFactory);
142