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