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 "SkImageDecoder.h"
12 #include "SkStream.h"
13
14 static const struct {
15 SkBitmap::Config fPrefConfig;
16 bool fDither;
17 } gRec[] = {
18 { SkBitmap::kIndex8_Config, false },
19 { SkBitmap::kARGB_8888_Config, false },
20 { SkBitmap::kARGB_4444_Config, false },
21 { SkBitmap::kARGB_4444_Config, true },
22 { SkBitmap::kRGB_565_Config, false },
23 { SkBitmap::kRGB_565_Config, true },
24 };
25
26 class DecodeView : public SkView {
27 public:
28 SkBitmap fBitmap[SK_ARRAY_COUNT(gRec)];
29
DecodeView()30 DecodeView() {
31 SkFILEStream stream("/skimages/index.png");
32 SkImageDecoder* codec = SkImageDecoder::Factory(&stream);
33 if (codec) {
34 for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); i++) {
35 stream.rewind();
36 codec->setDitherImage(gRec[i].fDither);
37 codec->decode(&stream, &fBitmap[i], gRec[i].fPrefConfig,
38 SkImageDecoder::kDecodePixels_Mode);
39 }
40 }
41 }
42
43 protected:
44 // overrides from SkEventSink
onQuery(SkEvent * evt)45 virtual bool onQuery(SkEvent* evt) {
46 if (SampleCode::TitleQ(*evt)) {
47 SampleCode::TitleR(evt, "ImageDecoder");
48 return true;
49 }
50 return this->INHERITED::onQuery(evt);
51 }
52
drawBG(SkCanvas * canvas)53 void drawBG(SkCanvas* canvas) {
54 canvas->drawColor(0xFFDDDDDD);
55 // canvas->drawColor(SK_ColorWHITE);
56 }
57
onDraw(SkCanvas * canvas)58 virtual void onDraw(SkCanvas* canvas) {
59 this->drawBG(canvas);
60
61 canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
62
63 for (size_t i = 0; i < SK_ARRAY_COUNT(fBitmap); i++) {
64 canvas->drawBitmap(fBitmap[i], 0, 0);
65 canvas->translate(SkIntToScalar(fBitmap[i].width()), 0);
66 }
67 }
68 private:
69 typedef SkView INHERITED;
70 };
71
72 //////////////////////////////////////////////////////////////////////////////
73
MyFactory()74 static SkView* MyFactory() { return new DecodeView; }
75 static SkViewRegister reg(MyFactory);
76
77
