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 "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],
39 SkBitmap::kARGB_8888_Config,
40 SkImageDecoder::kDecodePixels_Mode, NULL);
41 }
42 for (int i = fBitmapCount/2; i < fBitmapCount; i++) {
43 SkImageDecoder::DecodeFile(gNames[i-fBitmapCount/2], &fBitmaps[i],
44 SkBitmap::kRGB_565_Config,
45 SkImageDecoder::kDecodePixels_Mode, NULL);
46 }
47 fCurrIndex = 0;
48
49 this->setBGColor(SK_ColorGRAY);
50 }
51
~Filter2View()52 virtual ~Filter2View() {
53 delete[] fBitmaps;
54 }
55
56 protected:
57 // overrides from SkEventSink
onQuery(SkEvent * evt)58 virtual bool onQuery(SkEvent* evt) {
59 if (SampleCode::TitleQ(*evt)) {
60 SkString str("Filter/Dither ");
61 str.append(gNames[fCurrIndex]);
62 SampleCode::TitleR(evt, str.c_str());
63 return true;
64 }
65 return this->INHERITED::onQuery(evt);
66 }
67
onDrawContent(SkCanvas * canvas)68 virtual void onDrawContent(SkCanvas* canvas) {
69 canvas->translate(SkIntToScalar(10), SkIntToScalar(50));
70
71 const SkScalar W = SkIntToScalar(fBitmaps[0].width() + 1);
72 const SkScalar H = SkIntToScalar(fBitmaps[0].height() + 1);
73 SkPaint paint;
74
75 const SkScalar scale = SkFloatToScalar(0.897917f);
76 canvas->scale(SK_Scalar1, scale);
77
78 for (int k = 0; k < 2; k++) {
79 paint.setFilterBitmap(k == 1);
80 for (int j = 0; j < 2; j++) {
81 paint.setDither(j == 1);
82 for (int i = 0; i < fBitmapCount; i++) {
83 SkScalar x = (k * fBitmapCount + j) * W;
84 SkScalar y = i * H;
85 x = SkIntToScalar(SkScalarRound(x));
86 y = SkIntToScalar(SkScalarRound(y));
87 canvas->drawBitmap(fBitmaps[i], x, y, &paint);
88 if (i == 0) {
89 SkPaint p;
90 p.setAntiAlias(true);
91 p.setTextAlign(SkPaint::kCenter_Align);
92 p.setTextSize(SkIntToScalar(18));
93 SkString s("dither=");
94 s.appendS32(paint.isDither());
95 s.append(" filter=");
96 s.appendS32(paint.isFilterBitmap());
97 canvas->drawText(s.c_str(), s.size(), x + W/2,
98 y - p.getTextSize(), p);
99 }
100 if (k+j == 2) {
101 SkPaint p;
102 p.setAntiAlias(true);
103 p.setTextSize(SkIntToScalar(18));
104 SkString s;
105 s.append(" depth=");
106 s.appendS32(fBitmaps[i].config() == SkBitmap::kRGB_565_Config ? 16 : 32);
107 canvas->drawText(s.c_str(), s.size(), x + W + SkIntToScalar(4),
108 y + H/2, p);
109 }
110 }
111 }
112 }
113 }
114
115 private:
116 typedef SampleView INHERITED;
117 };
118
119 //////////////////////////////////////////////////////////////////////////////
120
MyFactory()121 static SkView* MyFactory() { return new Filter2View; }
122 static SkViewRegister reg(MyFactory);
123
124
