1 /*
2  * Copyright 2017 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 "SkColorSpace.h"
12 #include "SkImage.h"
13 #include "SkImagePriv.h"
14 
make_raster_image(const char * path)15 sk_sp<SkImage> make_raster_image(const char* path) {
16     sk_sp<SkData> resourceData = GetResourceAsData(path);
17     std::unique_ptr<SkCodec> codec = SkCodec::MakeFromData(resourceData);
18 
19     SkBitmap bitmap;
20     bitmap.allocPixels(codec->getInfo());
21 
22     codec->getPixels(codec->getInfo(), bitmap.getPixels(), bitmap.rowBytes());
23     return SkImage::MakeFromBitmap(bitmap);
24 }
25 
make_color_space(sk_sp<SkImage> orig,sk_sp<SkColorSpace> colorSpace)26 sk_sp<SkImage> make_color_space(sk_sp<SkImage> orig, sk_sp<SkColorSpace> colorSpace) {
27     sk_sp<SkImage> xform = orig->makeColorSpace(colorSpace);
28 
29     // Assign an sRGB color space on the xformed image, so we can see the effects of the xform
30     // when we draw.
31     sk_sp<SkColorSpace> srgb = SkColorSpace::MakeSRGB();
32     if (colorSpace->gammaIsLinear()) {
33         srgb = SkColorSpace::MakeSRGBLinear();
34     }
35     return SkImageMakeRasterCopyAndAssignColorSpace(xform.get(), srgb.get());
36 }
37 
38 class MakeCSGM : public skiagm::GM {
39 public:
MakeCSGM()40     MakeCSGM() {}
41 
42 protected:
onShortName()43     SkString onShortName() override {
44         return SkString("makecolorspace");
45     }
46 
onISize()47     SkISize onISize() override {
48         return SkISize::Make(128*3, 128*4);
49     }
50 
onDraw(SkCanvas * canvas)51     void onDraw(SkCanvas* canvas) override {
52         sk_sp<SkColorSpace> wideGamut = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB,
53                                                               SkNamedGamut::kAdobeRGB);
54         sk_sp<SkColorSpace> wideGamutLinear = wideGamut->makeLinearGamma();
55 
56         // Lazy images
57         sk_sp<SkImage> opaqueImage = GetResourceAsImage("images/mandrill_128.png");
58         sk_sp<SkImage> premulImage = GetResourceAsImage("images/color_wheel.png");
59         if (!opaqueImage || !premulImage) {
60             return;
61         }
62         canvas->drawImage(opaqueImage, 0.0f, 0.0f);
63         canvas->drawImage(make_color_space(opaqueImage, wideGamut), 128.0f, 0.0f);
64         canvas->drawImage(make_color_space(opaqueImage, wideGamutLinear), 256.0f, 0.0f);
65         canvas->drawImage(premulImage, 0.0f, 128.0f);
66         canvas->drawImage(make_color_space(premulImage, wideGamut), 128.0f, 128.0f);
67         canvas->drawImage(make_color_space(premulImage, wideGamutLinear), 256.0f, 128.0f);
68         canvas->translate(0.0f, 256.0f);
69 
70         // Raster images
71         opaqueImage = make_raster_image("images/mandrill_128.png");
72         premulImage = make_raster_image("images/color_wheel.png");
73         canvas->drawImage(opaqueImage, 0.0f, 0.0f);
74         canvas->drawImage(make_color_space(opaqueImage, wideGamut), 128.0f, 0.0f);
75         canvas->drawImage(make_color_space(opaqueImage, wideGamutLinear), 256.0f, 0.0f);
76         canvas->drawImage(premulImage, 0.0f, 128.0f);
77         canvas->drawImage(make_color_space(premulImage, wideGamut), 128.0f, 128.0f);
78         canvas->drawImage(make_color_space(premulImage, wideGamutLinear), 256.0f, 128.0f);
79     }
80 
81 private:
82     typedef skiagm::GM INHERITED;
83 };
84 
85 DEF_GM(return new MakeCSGM;)
86 
87 DEF_SIMPLE_GM_BG(makecolortypeandspace, canvas, 128 * 3, 128 * 4, SK_ColorWHITE) {
88     sk_sp<SkImage> images[] = {
89         GetResourceAsImage("images/mandrill_128.png"),
90         GetResourceAsImage("images/color_wheel.png"),
91     };
92     auto rec2020 = SkColorSpace::MakeRGB(SkNamedTransferFn::kSRGB, SkNamedGamut::kRec2020);
93 
94     // Use the lazy images on the first iteration, and concrete (raster/GPU) images on the second
95     for (bool lazy : {true, false}) {
96         for (int j = 0; j < 2; ++j) {
97             const SkImage* image = images[j].get();
98             if (!image) {
99                 // Can happen on bots that abandon the GPU context
100                 continue;
101             }
102 
103             // Unmodified
104             canvas->drawImage(image, 0, 0);
105 
106             // Change the color type/space of the image in a couple ways. In both cases, codec
107             // may fail, because we refude to decode transparent sources to opaque color types.
108             // Guard against that, to avoid cascading failures in DDL.
109 
110             // 565 in a wide color space (should be visibly quantized). Fails with the color_wheel,
111             // because of the codec issues mentioned above.
112             auto image565 = image->makeColorTypeAndColorSpace(kRGB_565_SkColorType, rec2020);
113             if (!lazy || image565->makeRasterImage()) {
114                 canvas->drawImage(image565, 128, 0);
115             }
116 
117             // Grayscale in the original color space. This fails in even more cases, due to the
118             // above opaque issue, and because Ganesh doesn't support drawing to gray, at all.
119             auto imageGray = image->makeColorTypeAndColorSpace(kGray_8_SkColorType,
120                                                                image->refColorSpace());
121             if (!lazy || imageGray->makeRasterImage()) {
122                 canvas->drawImage(imageGray, 256, 0);
123             }
124 
125             images[j] = canvas->getGrContext()
126                     ? image->makeTextureImage(canvas->getGrContext(), nullptr)
127                     : image->makeRasterImage();
128 
129             canvas->translate(0, 128);
130         }
131     }
132 }
133