1
2 /*
3 * Copyright 2011 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 "SampleCode.h"
9 #include "SkView.h"
10 #include "SkCanvas.h"
11 #include "SkGradientShader.h"
12 #include "SkPath.h"
13 #include "SkRegion.h"
14 #include "SkShader.h"
15 #include "SkUtils.h"
16 #include "Sk1DPathEffect.h"
17 #include "SkCornerPathEffect.h"
18 #include "SkPathMeasure.h"
19 #include "SkRandom.h"
20 #include "SkColorPriv.h"
21 #include "SkColorFilter.h"
22 #include "SkDither.h"
23
make_bm(SkBitmap * bm)24 static void make_bm(SkBitmap* bm) {
25 const SkColor colors[] = {
26 SK_ColorRED, SK_ColorGREEN,
27 SK_ColorBLUE, SK_ColorWHITE
28 };
29 SkColorTable* ctable = new SkColorTable(colors, 4);
30 bm->setConfig(SkBitmap::kIndex8_Config, 2, 2);
31 bm->allocPixels(ctable);
32 ctable->unref();
33
34 *bm->getAddr8(0, 0) = 0;
35 *bm->getAddr8(1, 0) = 1;
36 *bm->getAddr8(0, 1) = 2;
37 *bm->getAddr8(1, 1) = 3;
38 }
39
draw_bm(SkCanvas * canvas,const SkBitmap & bm,SkScalar x,SkScalar y,SkPaint * paint)40 static SkScalar draw_bm(SkCanvas* canvas, const SkBitmap& bm,
41 SkScalar x, SkScalar y, SkPaint* paint) {
42 #if 1
43 canvas->drawBitmap(bm, x, y, paint);
44 return SkIntToScalar(bm.width()) * 5/4;
45 #else
46 SkAutoCanvasRestore acr(canvas, true);
47 canvas->translate(x, y);
48
49 SkScalar w = SkIntToScalar(bm.width());
50 SkScalar h = SkIntToScalar(bm.height());
51 SkShader* s = SkShader::CreateBitmapShader(bm, SkShader::kRepeat_TileMode,
52 SkShader::kRepeat_TileMode);
53 paint->setShader(s)->unref();
54 canvas->drawRect(SkRect::MakeWH(w, h), *paint);
55 paint->setShader(NULL);
56 return w * 5/4;
57 #endif
58 }
59
draw_set(SkCanvas * c,const SkBitmap & bm,SkScalar x,SkPaint * p)60 static SkScalar draw_set(SkCanvas* c, const SkBitmap& bm, SkScalar x, SkPaint* p) {
61 x += draw_bm(c, bm, x, 0, p);
62 p->setFilterBitmap(true);
63 x += draw_bm(c, bm, x, 0, p);
64 p->setDither(true);
65 return x + draw_bm(c, bm, x, 0, p);
66 }
67
68 static const char* gConfigNames[] = {
69 "unknown config",
70 "A1",
71 "A8",
72 "Index8",
73 "565",
74 "4444",
75 "8888"
76 };
77
draw_row(SkCanvas * canvas,const SkBitmap & bm)78 static SkScalar draw_row(SkCanvas* canvas, const SkBitmap& bm) {
79 SkAutoCanvasRestore acr(canvas, true);
80
81 SkPaint paint;
82 SkScalar x = 0;
83 const int scale = 32;
84
85 paint.setAntiAlias(true);
86 const char* name = gConfigNames[bm.config()];
87 canvas->drawText(name, strlen(name), x, SkIntToScalar(bm.height())*scale*5/8,
88 paint);
89 canvas->translate(SkIntToScalar(48), 0);
90
91 canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
92
93 x += draw_set(canvas, bm, 0, &paint);
94 paint.reset();
95 paint.setAlpha(0x80);
96 draw_set(canvas, bm, x, &paint);
97 return x * scale / 3;
98 }
99
100 class FilterView : public SampleView {
101 public:
102 SkBitmap fBM8, fBM4444, fBM16, fBM32;
103
FilterView()104 FilterView() {
105 make_bm(&fBM8);
106 fBM8.copyTo(&fBM4444, SkBitmap::kARGB_4444_Config);
107 fBM8.copyTo(&fBM16, SkBitmap::kRGB_565_Config);
108 fBM8.copyTo(&fBM32, SkBitmap::kARGB_8888_Config);
109
110 this->setBGColor(0xFFDDDDDD);
111 }
112
113 protected:
114 // overrides from SkEventSink
onQuery(SkEvent * evt)115 virtual bool onQuery(SkEvent* evt) {
116 if (SampleCode::TitleQ(*evt)) {
117 SampleCode::TitleR(evt, "Filter");
118 return true;
119 }
120 return this->INHERITED::onQuery(evt);
121 }
122
onDrawContent(SkCanvas * canvas)123 virtual void onDrawContent(SkCanvas* canvas) {
124 SkScalar x = SkIntToScalar(10);
125 SkScalar y = SkIntToScalar(10);
126
127 canvas->translate(x, y);
128 y = draw_row(canvas, fBM8);
129 canvas->translate(0, y);
130 y = draw_row(canvas, fBM4444);
131 canvas->translate(0, y);
132 y = draw_row(canvas, fBM16);
133 canvas->translate(0, y);
134 draw_row(canvas, fBM32);
135 }
136
137 private:
138 typedef SampleView INHERITED;
139 };
140
141 //////////////////////////////////////////////////////////////////////////////
142
MyFactory()143 static SkView* MyFactory() { return new FilterView; }
144 static SkViewRegister reg(MyFactory);
145
146