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
14static 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
26class DecodeView : public SkView {
27public:
28    SkBitmap fBitmap[SK_ARRAY_COUNT(gRec)];
29
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
43protected:
44    // overrides from SkEventSink
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
53    void drawBG(SkCanvas* canvas) {
54        canvas->drawColor(0xFFDDDDDD);
55//        canvas->drawColor(SK_ColorWHITE);
56    }
57
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    }
68private:
69    typedef SkView INHERITED;
70};
71
72//////////////////////////////////////////////////////////////////////////////
73
74static SkView* MyFactory() { return new DecodeView; }
75static SkViewRegister reg(MyFactory);
76
77