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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2011 Google Inc. | 3 * Copyright 2011 Google Inc. |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 #include "SampleCode.h" | 8 #include "SampleCode.h" |
9 #include "SkView.h" | 9 #include "SkView.h" |
10 #include "SkCanvas.h" | 10 #include "SkCanvas.h" |
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60 protected: | 60 protected: |
61 // overrides from SkEventSink | 61 // overrides from SkEventSink |
62 virtual bool onQuery(SkEvent* evt) { | 62 virtual bool onQuery(SkEvent* evt) { |
63 if (SampleCode::TitleQ(*evt)) { | 63 if (SampleCode::TitleQ(*evt)) { |
64 SampleCode::TitleR(evt, "MipMaps"); | 64 SampleCode::TitleR(evt, "MipMaps"); |
65 return true; | 65 return true; |
66 } | 66 } |
67 return this->INHERITED::onQuery(evt); | 67 return this->INHERITED::onQuery(evt); |
68 } | 68 } |
69 | 69 |
70 void drawN(SkCanvas* canvas, const SkBitmap& bitmap) { | |
71 SkAutoCanvasRestore acr(canvas, true); | |
72 for (int i = N; i > 1; i >>= 1) { | |
73 canvas->drawBitmap(bitmap, 0, 0, NULL); | |
74 canvas->translate(SkIntToScalar(N + 8), 0); | |
75 canvas->scale(SK_ScalarHalf, SK_ScalarHalf); | |
76 } | |
77 } | |
78 | |
79 void drawN2(SkCanvas* canvas, const SkBitmap& bitmap) { | |
80 SkBitmap bg; | |
81 bg.setConfig(SkBitmap::kARGB_8888_Config, N, N); | |
82 bg.allocPixels(); | |
83 | |
84 SkAutoCanvasRestore acr(canvas, true); | |
85 for (int i = 0; i < 6; i++) { | |
86 bg.eraseColor(SK_ColorTRANSPARENT); | |
87 SkCanvas c(bg); | |
88 c.scale(SK_Scalar1 / (1 << i), SK_Scalar1 / (1 << i)); | |
89 c.drawBitmap(bitmap, 0, 0, NULL); | |
90 | |
91 canvas->save(); | |
92 canvas->scale(SkIntToScalar(1 << i), SkIntToScalar(1 << i)); | |
93 canvas->drawBitmap(bg, 0, 0, NULL); | |
94 canvas->restore(); | |
95 canvas->translate(SkIntToScalar(N + 8), 0); | |
96 } | |
97 } | |
98 | |
99 virtual void onDrawContent(SkCanvas* canvas) { | 70 virtual void onDrawContent(SkCanvas* canvas) { |
100 this->init(); | 71 this->init(); |
101 canvas->translate(SkIntToScalar(10), SkIntToScalar(10)); | 72 |
102 | 73 static const SkPaint::FilterLevel gLevel[] = { |
103 canvas->scale(1.00000001f, 0.9999999f); | 74 SkPaint::kNone_FilterLevel, |
104 | 75 SkPaint::kLow_FilterLevel, |
105 drawN2(canvas, fBitmap); | 76 SkPaint::kMedium_FilterLevel, |
106 | 77 SkPaint::kHigh_FilterLevel, |
107 canvas->translate(0, SkIntToScalar(N + 8)); | 78 }; |
108 SkBitmap bitmap(fBitmap); | |
109 bitmap.buildMipMap(); | |
110 drawN2(canvas, bitmap); | |
111 | |
112 SkScalar time = SampleCode::GetAnimScalar(SkIntToScalar(1)/4, | |
113 SkIntToScalar(2)); | |
114 if (time >= SK_Scalar1) { | |
115 time = SkIntToScalar(2) - time; | |
116 } | |
117 fWidth = 8 + SkScalarRound(N * time); | |
118 | |
119 SkRect dst; | |
120 dst.set(0, 0, SkIntToScalar(fWidth), SkIntToScalar(fWidth)); | |
121 | 79 |
122 SkPaint paint; | 80 SkPaint paint; |
123 paint.setFilterBitmap(true); | 81 |
124 paint.setAntiAlias(true); | 82 for (size_t i = 0; i < SK_ARRAY_COUNT(gLevel); ++i) { |
125 | 83 SkScalar x = 10 + i * 100; |
126 canvas->translate(0, SkIntToScalar(N + 8)); | 84 SkScalar y = 10; |
127 canvas->drawBitmapRect(fBitmap, NULL, dst, NULL); | 85 |
128 canvas->translate(SkIntToScalar(N + 8), 0); | 86 paint.setFilterLevel(gLevel[i]); |
129 canvas->drawBitmapRect(fBitmap, NULL, dst, &paint); | 87 |
130 canvas->translate(-SkIntToScalar(N + 8), SkIntToScalar(N + 8)); | 88 canvas->drawBitmap(fBitmap, x, y, &paint); |
131 canvas->drawBitmapRect(bitmap, NULL, dst, NULL); | 89 } |
132 canvas->translate(SkIntToScalar(N + 8), 0); | |
133 canvas->drawBitmapRect(bitmap, NULL, dst, &paint); | |
134 | |
135 SkShader* s = SkShader::CreateBitmapShader(bitmap, | |
136 SkShader::kRepeat_TileMode, | |
137 SkShader::kRepeat_TileMode); | |
138 paint.setShader(s)->unref(); | |
139 SkMatrix m; | |
140 m.setScale(SkIntToScalar(fWidth) / N, | |
141 SkIntToScalar(fWidth) / N); | |
142 s->setLocalMatrix(m); | |
143 SkRect r; | |
144 r.set(0, 0, SkIntToScalar(4*N), SkIntToScalar(5*N/2)); | |
145 r.offset(SkIntToScalar(N + 12), -SkIntToScalar(N + 4)); | |
146 canvas->drawRect(r, paint); | |
147 | |
148 this->inval(NULL); | 90 this->inval(NULL); |
149 } | 91 } |
150 | 92 |
151 private: | 93 private: |
152 int fWidth; | 94 int fWidth; |
153 | 95 |
154 typedef SampleView INHERITED; | 96 typedef SampleView INHERITED; |
155 }; | 97 }; |
156 | 98 |
157 ////////////////////////////////////////////////////////////////////////////// | 99 ////////////////////////////////////////////////////////////////////////////// |
158 | 100 |
159 static SkView* MyFactory() { return new MipMapView; } | 101 static SkView* MyFactory() { return new MipMapView; } |
160 static SkViewRegister reg(MyFactory); | 102 static SkViewRegister reg(MyFactory); |
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