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 
13 namespace skiagm {
14 
15 class BitmapImageGM : public GM {
16 public:
BitmapImageGM()17     BitmapImageGM() {}
18 
19 protected:
20 
onShortName()21     SkString onShortName() override {
22         return SkString("bitmap-image-srgb-legacy");
23     }
24 
onISize()25     SkISize onISize() override {
26         return SkISize::Make(2*kSize, 2*kSize);
27     }
28 
onDraw(SkCanvas * canvas,SkString * errorMsg)29     DrawResult onDraw(SkCanvas* canvas, SkString* errorMsg) override {
30         // Create image.
31         const char* path = "images/mandrill_512_q075.jpg";
32         sk_sp<SkImage> image = GetResourceAsImage(path);
33         if (!image) {
34             *errorMsg = "Couldn't load images/mandrill_512_q075.jpg. "
35                         "Did you forget to set the resource path?";
36             return DrawResult::kFail;
37         }
38 
39         // Create matching bitmap.
40         std::unique_ptr<SkCodec> codec(SkCodec::MakeFromStream(GetResourceAsStream(path)));
41         SkBitmap bitmap;
42         bitmap.allocPixels(codec->getInfo());
43         codec->getPixels(codec->getInfo(), bitmap.getPixels(), bitmap.rowBytes());
44 
45         // The GM will be displayed in a 2x2 grid.
46         // The top two squares show an sRGB image, then bitmap, drawn to a legacy canvas.
47         SkImageInfo linearInfo = SkImageInfo::MakeN32(2*kSize, kSize, kOpaque_SkAlphaType);
48         SkBitmap legacyBMCanvas;
49         legacyBMCanvas.allocPixels(linearInfo);
50         SkCanvas legacyCanvas(legacyBMCanvas);
51         legacyCanvas.drawImage(image, 0.0f, 0.0f, nullptr);
52         legacyCanvas.translate(SkScalar(kSize), 0.0f);
53         legacyCanvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);
54         canvas->drawBitmap(legacyBMCanvas, 0.0f, 0.0f, nullptr);
55         canvas->translate(0.0f, SkScalar(kSize));
56 
57         // The bottom two squares show an sRGB image, then bitmap, drawn to a srgb canvas.
58         SkImageInfo srgbInfo = SkImageInfo::MakeS32(2*kSize, kSize, kOpaque_SkAlphaType);
59         SkBitmap srgbBMCanvas;
60         srgbBMCanvas.allocPixels(srgbInfo);
61         SkCanvas srgbCanvas(srgbBMCanvas);
62         srgbCanvas.drawImage(image, 0.0f, 0.0f, nullptr);
63         srgbCanvas.translate(SkScalar(kSize), 0.0f);
64         srgbCanvas.drawBitmap(bitmap, 0.0f, 0.0f, nullptr);
65         canvas->drawBitmap(srgbBMCanvas, 0.0f, 0.0f, nullptr);
66         return DrawResult::kOk;
67     }
68 
69 private:
70     static constexpr int kSize = 512;
71 
72     typedef GM INHERITED;
73 };
74 
75 //////////////////////////////////////////////////////////////////////////////
76 
77 DEF_GM( return new BitmapImageGM; )
78 
79 }
80