1 #include "SampleCode.h"
2 #include "SkView.h"
3 #include "SkCanvas.h"
4 #include "SkGradientShader.h"
5 #include "SkGraphics.h"
6 #include "SkImageDecoder.h"
7 #include "SkPath.h"
8 #include "SkRegion.h"
9 #include "SkShader.h"
10 #include "SkUtils.h"
11 #include "SkXfermode.h"
12 #include "SkColorPriv.h"
13 #include "SkColorFilter.h"
14 #include "SkTime.h"
15
16 static const char* gNames[] = {
17 "/skimages/background_01.png"
18 };
19
20 class Filter2View : public SampleView {
21 public:
22 SkBitmap* fBitmaps;
23 int fBitmapCount;
24 int fCurrIndex;
25
Filter2View()26 Filter2View() {
27 fBitmapCount = SK_ARRAY_COUNT(gNames)*2;
28 fBitmaps = new SkBitmap[fBitmapCount];
29
30 for (int i = 0; i < fBitmapCount/2; i++) {
31 SkImageDecoder::DecodeFile(gNames[i], &fBitmaps[i],
32 SkBitmap::kARGB_8888_Config,
33 SkImageDecoder::kDecodePixels_Mode, NULL);
34 }
35 for (int i = fBitmapCount/2; i < fBitmapCount; i++) {
36 SkImageDecoder::DecodeFile(gNames[i-fBitmapCount/2], &fBitmaps[i],
37 SkBitmap::kRGB_565_Config,
38 SkImageDecoder::kDecodePixels_Mode, NULL);
39 }
40 fCurrIndex = 0;
41
42 this->setBGColor(SK_ColorGRAY);
43 }
44
~Filter2View()45 virtual ~Filter2View() {
46 delete[] fBitmaps;
47 }
48
49 protected:
50 // overrides from SkEventSink
onQuery(SkEvent * evt)51 virtual bool onQuery(SkEvent* evt) {
52 if (SampleCode::TitleQ(*evt)) {
53 SkString str("Filter/Dither ");
54 str.append(gNames[fCurrIndex]);
55 SampleCode::TitleR(evt, str.c_str());
56 return true;
57 }
58 return this->INHERITED::onQuery(evt);
59 }
60
onDrawContent(SkCanvas * canvas)61 virtual void onDrawContent(SkCanvas* canvas) {
62 canvas->translate(SkIntToScalar(10), SkIntToScalar(50));
63
64 const SkScalar W = SkIntToScalar(fBitmaps[0].width() + 1);
65 const SkScalar H = SkIntToScalar(fBitmaps[0].height() + 1);
66 SkPaint paint;
67
68 const SkScalar scale = SkFloatToScalar(0.897917f);
69 canvas->scale(SK_Scalar1, scale);
70
71 for (int k = 0; k < 2; k++) {
72 paint.setFilterBitmap(k == 1);
73 for (int j = 0; j < 2; j++) {
74 paint.setDither(j == 1);
75 for (int i = 0; i < fBitmapCount; i++) {
76 SkScalar x = (k * fBitmapCount + j) * W;
77 SkScalar y = i * H;
78 x = SkIntToScalar(SkScalarRound(x));
79 y = SkIntToScalar(SkScalarRound(y));
80 canvas->drawBitmap(fBitmaps[i], x, y, &paint);
81 if (i == 0) {
82 SkPaint p;
83 p.setAntiAlias(true);
84 p.setTextAlign(SkPaint::kCenter_Align);
85 p.setTextSize(SkIntToScalar(18));
86 SkString s("dither=");
87 s.appendS32(paint.isDither());
88 s.append(" filter=");
89 s.appendS32(paint.isFilterBitmap());
90 canvas->drawText(s.c_str(), s.size(), x + W/2,
91 y - p.getTextSize(), p);
92 }
93 if (k+j == 2) {
94 SkPaint p;
95 p.setAntiAlias(true);
96 p.setTextSize(SkIntToScalar(18));
97 SkString s;
98 s.append(" depth=");
99 s.appendS32(fBitmaps[i].config() == SkBitmap::kRGB_565_Config ? 16 : 32);
100 canvas->drawText(s.c_str(), s.size(), x + W + SkIntToScalar(4),
101 y + H/2, p);
102 }
103 }
104 }
105 }
106 }
107
108 private:
109 typedef SampleView INHERITED;
110 };
111
112 //////////////////////////////////////////////////////////////////////////////
113
MyFactory()114 static SkView* MyFactory() { return new Filter2View; }
115 static SkViewRegister reg(MyFactory);
116
117
