xref: /third_party/skia/gm/encode.cpp (revision cb93a386) 
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 "gm/gm.h"
9#include "include/core/SkBitmap.h"
10#include "include/core/SkCanvas.h"
11#include "include/core/SkData.h"
12#include "include/core/SkEncodedImageFormat.h"
13#include "include/core/SkFont.h"
14#include "include/core/SkImage.h"
15#include "include/core/SkImageEncoder.h"
16#include "include/core/SkPaint.h"
17#include "include/core/SkRefCnt.h"
18#include "include/core/SkSize.h"
19#include "include/core/SkString.h"
20#include "tools/Resources.h"
21
22namespace skiagm {
23
24class EncodeGM : public GM {
25public:
26    EncodeGM() {}
27
28protected:
29    SkString onShortName() override {
30        return SkString("encode");
31    }
32
33    SkISize onISize() override {
34        return SkISize::Make(1024, 600);
35    }
36
37    void onDraw(SkCanvas* canvas) override {
38        SkBitmap orig;
39        GetResourceAsBitmap("images/mandrill_512_q075.jpg", &orig);
40        auto pngData = SkEncodeBitmap(orig, SkEncodedImageFormat::kPNG, 100);
41        auto jpgData = SkEncodeBitmap(orig, SkEncodedImageFormat::kJPEG, 100);
42
43        sk_sp<SkImage> pngImage = SkImage::MakeFromEncoded(pngData);
44        sk_sp<SkImage> jpgImage = SkImage::MakeFromEncoded(jpgData);
45        canvas->drawImage(pngImage.get(), 0.0f, 0.0f);
46        canvas->drawImage(jpgImage.get(), 512.0f, 0.0f);
47
48        SkFont font;
49        font.setEdging(SkFont::Edging::kAlias);
50        canvas->drawString("Images should look identical.", 450.0f, 550.0f, font, SkPaint());
51    }
52
53private:
54    using INHERITED = GM;
55};
56
57DEF_GM( return new EncodeGM; )
58}  // namespace skiagm
59
60///////////
61
62#if 0
63DEF_SIMPLE_GM(jpeg_orientation, canvas, 1000, 1000) {
64    static sk_sp<SkImage> imgs[8];
65    if (!imgs[0]) {
66        for (int i = 0; i < 8; ++i) {
67            SkString path;
68            path.printf("/skia/orientation/Landscape_%d.jpg", i + 1);
69            auto stream = SkStream::MakeFromFile(path.c_str());
70            auto data = SkData::MakeFromStream(stream.get(), stream->getLength());
71            imgs[i] = SkImage::MakeFromEncoded(data, nullptr);
72        }
73    }
74    canvas->scale(0.25, 0.25);
75    for (int i = 0; i < 8; ++i) {
76        SkImage* img = imgs[i].get();
77        canvas->drawImage(img, 0, 0, nullptr);
78        canvas->translate(0, img->height());
79        if (i == 3) {
80            canvas->translate(img->width(), -4*img->height());
81        }
82    }
83}
84#endif
85