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      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 "SkImage.h"
     12 #include "SkImagePriv.h"
     13 
     14 sk_sp<SkImage> make_raster_image(const char* path, SkTransferFunctionBehavior behavior) {
     15     sk_sp<SkData> resourceData = GetResourceAsData(path);
     16     std::unique_ptr<SkCodec> codec = SkCodec::MakeFromData(resourceData);
     17 
     18     SkBitmap bitmap;
     19     bitmap.allocPixels(codec->getInfo());
     20 
     21     SkCodec::Options opts;
     22     opts.fPremulBehavior = behavior;
     23     codec->getPixels(codec->getInfo(), bitmap.getPixels(), bitmap.rowBytes(), &opts);
     24     return SkImage::MakeFromBitmap(bitmap);
     25 }
     26 
     27 sk_sp<SkImage> make_color_space(sk_sp<SkImage> orig, sk_sp<SkColorSpace> colorSpace,
     28                                 SkTransferFunctionBehavior behavior) {
     29     sk_sp<SkImage> xform = orig->makeColorSpace(colorSpace, behavior);
     30 
     31     // Assign an sRGB color space on the xformed image, so we can see the effects of the xform
     32     // when we draw.
     33     sk_sp<SkColorSpace> srgb = SkColorSpace::MakeSRGB();
     34     if (colorSpace->gammaIsLinear()) {
     35         srgb = SkColorSpace::MakeSRGBLinear();
     36     }
     37     return SkImageMakeRasterCopyAndAssignColorSpace(xform.get(), srgb.get());
     38 }
     39 
     40 class MakeCSGM : public skiagm::GM {
     41 public:
     42     MakeCSGM() {}
     43 
     44 protected:
     45     SkString onShortName() override {
     46         return SkString("makecolorspace");
     47     }
     48 
     49     SkISize onISize() override {
     50         return SkISize::Make(128*3, 128*4);
     51     }
     52 
     53     void onDraw(SkCanvas* canvas) override {
     54         SkTransferFunctionBehavior behavior = canvas->imageInfo().colorSpace() ?
     55                 SkTransferFunctionBehavior::kRespect : SkTransferFunctionBehavior::kIgnore;
     56 
     57         sk_sp<SkColorSpace> wideGamut = SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma,
     58                                                               SkColorSpace::kAdobeRGB_Gamut);
     59         sk_sp<SkColorSpace> wideGamutLinear = wideGamut->makeLinearGamma();
     60 
     61         // Lazy images
     62         sk_sp<SkImage> opaqueImage = GetResourceAsImage("images/mandrill_128.png");
     63         sk_sp<SkImage> premulImage = GetResourceAsImage("images/color_wheel.png");
     64         canvas->drawImage(opaqueImage, 0.0f, 0.0f);
     65         canvas->drawImage(make_color_space(opaqueImage, wideGamut, behavior), 128.0f, 0.0f);
     66         canvas->drawImage(make_color_space(opaqueImage, wideGamutLinear, behavior), 256.0f, 0.0f);
     67         canvas->drawImage(premulImage, 0.0f, 128.0f);
     68         canvas->drawImage(make_color_space(premulImage, wideGamut, behavior), 128.0f, 128.0f);
     69         canvas->drawImage(make_color_space(premulImage, wideGamutLinear, behavior), 256.0f, 128.0f);
     70         canvas->translate(0.0f, 256.0f);
     71 
     72         // Raster images
     73         opaqueImage = make_raster_image("images/mandrill_128.png", behavior);
     74         premulImage = make_raster_image("images/color_wheel.png", behavior);
     75         canvas->drawImage(opaqueImage, 0.0f, 0.0f);
     76         canvas->drawImage(make_color_space(opaqueImage, wideGamut, behavior), 128.0f, 0.0f);
     77         canvas->drawImage(make_color_space(opaqueImage, wideGamutLinear, behavior), 256.0f, 0.0f);
     78         canvas->drawImage(premulImage, 0.0f, 128.0f);
     79         canvas->drawImage(make_color_space(premulImage, wideGamut, behavior), 128.0f, 128.0f);
     80         canvas->drawImage(make_color_space(premulImage, wideGamutLinear, behavior), 256.0f, 128.0f);
     81     }
     82 
     83 private:
     84     typedef skiagm::GM INHERITED;
     85 };
     86 
     87 DEF_GM(return new MakeCSGM;)
     88