1/*
2 * Copyright 2016 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#include "Resources.h"
10#include "SkCodec.h"
11#include "SkImage.h"
12
13namespace skiagm {
14
15class BitmapImageGM : public GM {
16public:
17    BitmapImageGM() {}
18
19protected:
20
21    SkString onShortName() override {
22        return SkString("bitmap-image-srgb-legacy");
23    }
24
25    SkISize onISize() override {
26        return SkISize::Make(2*kSize, 2*kSize);
27    }
28
29    void onDraw(SkCanvas* canvas) override {
30        // Create image.
31        const char* path = "mandrill_512_q075.jpg";
32        sk_sp<SkImage> image = GetResourceAsImage(path);
33        if (!image) {
34            SkDebugf("Failure: Is the resource path set properly?");
35            return;
36        }
37
38        // Create matching bitmap.
39        std::unique_ptr<SkCodec> codec(SkCodec::NewFromStream(GetResourceAsStream(path)));
40        SkBitmap bitmap;
41        bitmap.allocPixels(codec->getInfo());
42        codec->getPixels(codec->getInfo(), bitmap.getPixels(), bitmap.rowBytes());
43
44        // The GM will be displayed in a 2x2 grid.
45        // The top two squares show an sRGB image, then bitmap, drawn to a legacy canvas.
46        SkImageInfo linearInfo = SkImageInfo::MakeN32(2*kSize, kSize, kOpaque_SkAlphaType);
47        SkBitmap legacyBMCanvas;
48        legacyBMCanvas.allocPixels(linearInfo);
49        SkCanvas legacyCanvas(legacyBMCanvas);
50        legacyCanvas.drawImage(image, 0.0f, 0.0f, nullptr);
51        legacyCanvas.translate(SkScalar(kSize), 0.0f);
52        legacyCanvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);
53        canvas->drawBitmap(legacyBMCanvas, 0.0f, 0.0f, nullptr);
54        canvas->translate(0.0f, SkScalar(kSize));
55
56        // The bottom two squares show an sRGB image, then bitmap, drawn to a srgb canvas.
57        SkImageInfo srgbInfo = SkImageInfo::MakeS32(2*kSize, kSize, kOpaque_SkAlphaType);
58        SkBitmap srgbBMCanvas;
59        srgbBMCanvas.allocPixels(srgbInfo);
60        SkCanvas srgbCanvas(srgbBMCanvas);
61        srgbCanvas.drawImage(image, 0.0f, 0.0f, nullptr);
62        srgbCanvas.translate(SkScalar(kSize), 0.0f);
63        srgbCanvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);
64        canvas->drawBitmap(srgbBMCanvas, 0.0f, 0.0f, nullptr);
65    }
66
67private:
68    static constexpr int kSize = 512;
69
70    typedef GM INHERITED;
71};
72
73//////////////////////////////////////////////////////////////////////////////
74
75static GM* MyFactory(void*) { return new BitmapImageGM; }
76static GMRegistry reg(MyFactory);
77
78}
79