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
8 #include "SampleCode.h"
9 #include "SkView.h"
10 #include "SkCanvas.h"
11 #include "SkGradientShader.h"
12 #include "SkGraphics.h"
13 #include "SkImageDecoder.h"
14 #include "SkPath.h"
15 #include "SkRegion.h"
16 #include "SkShader.h"
17 #include "SkUtils.h"
18 #include "SkXfermode.h"
19 #include "SkColorPriv.h"
20 #include "SkColorFilter.h"
21 #include "SkTime.h"
22
23 static const char* gNames[] = {
24 "/skimages/background_01.png"
25 };
26
27 class Filter2View : public SampleView {
28 public:
29 SkBitmap* fBitmaps;
30 int fBitmapCount;
31 int fCurrIndex;
32
Filter2View()33 Filter2View() {
34 fBitmapCount = SK_ARRAY_COUNT(gNames)*2;
35 fBitmaps = new SkBitmap[fBitmapCount];
36
37 for (int i = 0; i < fBitmapCount/2; i++) {
38 SkImageDecoder::DecodeFile(gNames[i], &fBitmaps[i], kN32_SkColorType,
39 SkImageDecoder::kDecodePixels_Mode, nullptr);
40 }
41 for (int i = fBitmapCount/2; i < fBitmapCount; i++) {
42 SkImageDecoder::DecodeFile(gNames[i-fBitmapCount/2], &fBitmaps[i], kRGB_565_SkColorType,
43 SkImageDecoder::kDecodePixels_Mode, nullptr);
44 }
45 fCurrIndex = 0;
46
47 this->setBGColor(SK_ColorGRAY);
48 }
49
~Filter2View()50 virtual ~Filter2View() {
51 delete[] fBitmaps;
52 }
53
54 protected:
55 // overrides from SkEventSink
onQuery(SkEvent * evt)56 virtual bool onQuery(SkEvent* evt) {
57 if (SampleCode::TitleQ(*evt)) {
58 SkString str("Filter/Dither ");
59 str.append(gNames[fCurrIndex]);
60 SampleCode::TitleR(evt, str.c_str());
61 return true;
62 }
63 return this->INHERITED::onQuery(evt);
64 }
65
onDrawContent(SkCanvas * canvas)66 virtual void onDrawContent(SkCanvas* canvas) {
67 canvas->translate(SkIntToScalar(10), SkIntToScalar(50));
68
69 const SkScalar W = SkIntToScalar(fBitmaps[0].width() + 1);
70 const SkScalar H = SkIntToScalar(fBitmaps[0].height() + 1);
71 SkPaint paint;
72
73 const SkScalar scale = 0.897917f;
74 canvas->scale(SK_Scalar1, scale);
75
76 for (int k = 0; k < 2; k++) {
77 paint.setFilterQuality(k == 1 ? kLow_SkFilterQuality : kNone_SkFilterQuality);
78 for (int j = 0; j < 2; j++) {
79 paint.setDither(j == 1);
80 for (int i = 0; i < fBitmapCount; i++) {
81 SkScalar x = (k * fBitmapCount + j) * W;
82 SkScalar y = i * H;
83 x = SkScalarRoundToScalar(x);
84 y = SkScalarRoundToScalar(y);
85 canvas->drawBitmap(fBitmaps[i], x, y, &paint);
86 if (i == 0) {
87 SkPaint p;
88 p.setAntiAlias(true);
89 p.setTextAlign(SkPaint::kCenter_Align);
90 p.setTextSize(SkIntToScalar(18));
91 SkString s("dither=");
92 s.appendS32(paint.isDither());
93 s.append(" filter=");
94 s.appendS32(paint.getFilterQuality() != kNone_SkFilterQuality);
95 canvas->drawText(s.c_str(), s.size(), x + W/2,
96 y - p.getTextSize(), p);
97 }
98 if (k+j == 2) {
99 SkPaint p;
100 p.setAntiAlias(true);
101 p.setTextSize(SkIntToScalar(18));
102 SkString s;
103 s.append(" depth=");
104 s.appendS32(fBitmaps[i].colorType() == kRGB_565_SkColorType ? 16 : 32);
105 canvas->drawText(s.c_str(), s.size(), x + W + SkIntToScalar(4),
106 y + H/2, p);
107 }
108 }
109 }
110 }
111 }
112
113 private:
114 typedef SampleView INHERITED;
115 };
116
117 //////////////////////////////////////////////////////////////////////////////
118
MyFactory()119 static SkView* MyFactory() { return new Filter2View; }
120 static SkViewRegister reg(MyFactory);
121
