1/*
2 * Copyright 2013 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 "gm.h"
9
10#include "SkImageDecoder.h"
11#include "SkStream.h"
12
13class ScaleBitmapGM : public skiagm::GM {
14
15public:
16
17    ScaleBitmapGM(const char filename[], float scale)
18        : fFilename(filename), fScale(scale)
19    {
20        this->setBGColor(0xFFDDDDDD);
21        fName.printf("scalebitmap_%s_%f", filename, scale);
22
23        SkString path(skiagm::GM::gResourcePath);
24        path.append("/");
25        path.append(fFilename);
26
27        SkImageDecoder *codec = NULL;
28        SkFILEStream stream(path.c_str());
29        if (stream.isValid()) {
30            codec = SkImageDecoder::Factory(&stream);
31        }
32        if (codec) {
33            stream.rewind();
34            codec->decode(&stream, &fBM, SkBitmap::kARGB_8888_Config,
35                SkImageDecoder::kDecodePixels_Mode);
36            SkDELETE(codec);
37        } else {
38            fBM.setConfig(SkBitmap::kARGB_8888_Config, 1, 1);
39            fBM.allocPixels();
40            *(fBM.getAddr32(0,0)) = 0xFF0000FF; // red == bad
41        }
42        fSize = fBM.height();
43    }
44
45protected:
46
47
48    SkBitmap    fBM;
49    SkString    fName;
50    SkString    fFilename;
51    int         fSize;
52    float       fScale;
53
54
55    virtual SkString onShortName() SK_OVERRIDE {
56        return fName;
57    }
58
59    virtual SkISize onISize() SK_OVERRIDE {
60        return SkISize::Make(fBM.width() * fScale, fBM.height() * fScale);
61    }
62
63    virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
64        SkBitmap dst;
65        dst.setConfig(SkBitmap::kARGB_8888_Config, fBM.width() * fScale, fBM.height() * fScale);
66        dst.allocPixels();
67        fBM.scale(&dst);
68
69        canvas->drawBitmap(dst, 0, 0);
70    }
71
72private:
73    typedef skiagm::GM INHERITED;
74};
75
76class ScaleBitmapMipmapGM: public ScaleBitmapGM {
77    SkMatrix fMatrix;
78
79public:
80    ScaleBitmapMipmapGM(const char filename[], float scale)
81        : INHERITED(filename, scale)
82    {
83        fName.printf("scalebitmap_mipmap_%s_%f", filename, scale);
84        fBM.buildMipMap();
85        fMatrix.setScale(scale, scale);
86    }
87protected:
88    virtual void onDraw(SkCanvas *canvas) SK_OVERRIDE {
89        SkPaint paint;
90
91        paint.setFilterBitmap(true);
92        canvas->drawBitmapMatrix(fBM, fMatrix, &paint);
93    }
94private:
95     typedef ScaleBitmapGM INHERITED;
96};
97
98//////////////////////////////////////////////////////////////////////////////
99
100DEF_GM( return new ScaleBitmapGM("mandrill_128.png", 2); )
101DEF_GM( return new ScaleBitmapGM("mandrill_64.png", 4); )
102DEF_GM( return new ScaleBitmapGM("mandrill_32.png", 8); )
103DEF_GM( return new ScaleBitmapGM("mandrill_16.png", 16); )
104
105DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.5f); )
106DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.25f); )
107DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.125f); )
108DEF_GM( return new ScaleBitmapGM("nature.jpg", 0.0625f); )
109
110DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.5f); )
111DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.25f); )
112DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.125f); )
113DEF_GM( return new ScaleBitmapMipmapGM("nature.jpg", 0.0625f); )
114