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