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