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