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 "SkGradientShader.h"
11 #include "SkPath.h"
12 #include "SkRegion.h"
13 #include "SkShader.h"
14 #include "SkUtils.h"
15 #include "Sk1DPathEffect.h"
16 #include "SkCornerPathEffect.h"
17 #include "SkPathMeasure.h"
18 #include "SkRandom.h"
19 #include "SkColorPriv.h"
20 #include "SkColorFilter.h"
21 #include "SkDither.h"
22 #include "sk_tool_utils.h"
23
make_bm(SkBitmap * bm)24 static void make_bm(SkBitmap* bm) {
25 const SkPMColor colors[] = {
26 SkPreMultiplyColor(SK_ColorRED), SkPreMultiplyColor(SK_ColorGREEN),
27 SkPreMultiplyColor(SK_ColorBLUE), SkPreMultiplyColor(SK_ColorWHITE)
28 };
29 SkColorTable* ctable = new SkColorTable(colors, 4);
30 bm->allocPixels(SkImageInfo::Make(2, 2, kIndex_8_SkColorType,
31 kOpaque_SkAlphaType),
32 nullptr, ctable);
33 ctable->unref();
34
35 *bm->getAddr8(0, 0) = 0;
36 *bm->getAddr8(1, 0) = 1;
37 *bm->getAddr8(0, 1) = 2;
38 *bm->getAddr8(1, 1) = 3;
39 }
40
draw_bm(SkCanvas * canvas,const SkBitmap & bm,SkScalar x,SkScalar y,SkPaint * paint)41 static SkScalar draw_bm(SkCanvas* canvas, const SkBitmap& bm,
42 SkScalar x, SkScalar y, SkPaint* paint) {
43 canvas->drawBitmap(bm, x, y, paint);
44 return SkIntToScalar(bm.width()) * 5/4;
45 }
46
draw_set(SkCanvas * c,const SkBitmap & bm,SkScalar x,SkPaint * p)47 static SkScalar draw_set(SkCanvas* c, const SkBitmap& bm, SkScalar x, SkPaint* p) {
48 x += draw_bm(c, bm, x, 0, p);
49 p->setFilterQuality(kLow_SkFilterQuality);
50 x += draw_bm(c, bm, x, 0, p);
51 p->setDither(true);
52 return x + draw_bm(c, bm, x, 0, p);
53 }
54
draw_row(SkCanvas * canvas,const SkBitmap & bm)55 static SkScalar draw_row(SkCanvas* canvas, const SkBitmap& bm) {
56 SkAutoCanvasRestore acr(canvas, true);
57
58 SkPaint paint;
59 SkScalar x = 0;
60 const int scale = 32;
61
62 paint.setAntiAlias(true);
63 const char* name = sk_tool_utils::colortype_name(bm.colorType());
64 canvas->drawText(name, strlen(name), x, SkIntToScalar(bm.height())*scale*5/8,
65 paint);
66 canvas->translate(SkIntToScalar(48), 0);
67
68 canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
69
70 x += draw_set(canvas, bm, 0, &paint);
71 paint.reset();
72 paint.setAlpha(0x80);
73 draw_set(canvas, bm, x, &paint);
74 return x * scale / 3;
75 }
76
77 class FilterView : public SampleView {
78 public:
79 SkBitmap fBM8, fBM4444, fBM16, fBM32;
80
FilterView()81 FilterView() {
82 make_bm(&fBM8);
83 fBM8.copyTo(&fBM4444, kARGB_4444_SkColorType);
84 fBM8.copyTo(&fBM16, kRGB_565_SkColorType);
85 fBM8.copyTo(&fBM32, kN32_SkColorType);
86
87 this->setBGColor(0xFFDDDDDD);
88 }
89
90 protected:
91 // overrides from SkEventSink
onQuery(SkEvent * evt)92 virtual bool onQuery(SkEvent* evt) {
93 if (SampleCode::TitleQ(*evt)) {
94 SampleCode::TitleR(evt, "Filter");
95 return true;
96 }
97 return this->INHERITED::onQuery(evt);
98 }
99
onDrawContent(SkCanvas * canvas)100 virtual void onDrawContent(SkCanvas* canvas) {
101 SkScalar x = SkIntToScalar(10);
102 SkScalar y = SkIntToScalar(10);
103
104 canvas->translate(x, y);
105 y = draw_row(canvas, fBM8);
106 canvas->translate(0, y);
107 y = draw_row(canvas, fBM4444);
108 canvas->translate(0, y);
109 y = draw_row(canvas, fBM16);
110 canvas->translate(0, y);
111 draw_row(canvas, fBM32);
112 }
113
114 private:
115 typedef SampleView INHERITED;
116 };
117
118 //////////////////////////////////////////////////////////////////////////////
119
MyFactory()120 static SkView* MyFactory() { return new FilterView; }
121 static SkViewRegister reg(MyFactory);
122