91 lines
3.6 KiB
C++
91 lines
3.6 KiB
C++
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/*
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* Copyright 2017 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "Resources.h"
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#include "SkCodec.h"
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#include "SkColorSpace_Base.h"
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#include "SkImage.h"
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#include "SkImagePriv.h"
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sk_sp<SkImage> make_raster_image(const char* path, SkTransferFunctionBehavior behavior) {
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SkString resourcePath = GetResourcePath(path);
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sk_sp<SkData> resourceData = SkData::MakeFromFileName(resourcePath.c_str());
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std::unique_ptr<SkCodec> codec(SkCodec::NewFromData(resourceData));
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SkBitmap bitmap;
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bitmap.allocPixels(codec->getInfo());
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SkCodec::Options opts;
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opts.fPremulBehavior = behavior;
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codec->getPixels(codec->getInfo(), bitmap.getPixels(), bitmap.rowBytes(), &opts,
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nullptr, nullptr);
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return SkImage::MakeFromBitmap(bitmap);
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}
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sk_sp<SkImage> make_color_space(sk_sp<SkImage> orig, sk_sp<SkColorSpace> colorSpace,
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SkTransferFunctionBehavior behavior) {
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sk_sp<SkImage> xform = orig->makeColorSpace(colorSpace, behavior);
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// Assign an sRGB color space on the xformed image, so we can see the effects of the xform
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// when we draw.
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sk_sp<SkColorSpace> srgb = SkColorSpace::MakeSRGB();
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if (colorSpace->gammaIsLinear()) {
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srgb = SkColorSpace::MakeSRGBLinear();
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}
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return SkImageMakeRasterCopyAndAssignColorSpace(xform.get(), srgb.get());
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}
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class MakeCSGM : public skiagm::GM {
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public:
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MakeCSGM() {}
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protected:
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SkString onShortName() override {
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return SkString("makecolorspace");
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}
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SkISize onISize() override {
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return SkISize::Make(128*3, 128*4);
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}
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void onDraw(SkCanvas* canvas) override {
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SkTransferFunctionBehavior behavior = canvas->imageInfo().colorSpace() ?
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SkTransferFunctionBehavior::kRespect : SkTransferFunctionBehavior::kIgnore;
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sk_sp<SkColorSpace> wideGamut = SkColorSpace::MakeRGB(SkColorSpace::kSRGB_RenderTargetGamma,
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SkColorSpace::kAdobeRGB_Gamut);
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sk_sp<SkColorSpace> wideGamutLinear = as_CSB(wideGamut)->makeLinearGamma();
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// Lazy images
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sk_sp<SkImage> opaqueImage = GetResourceAsImage("mandrill_128.png");
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sk_sp<SkImage> premulImage = GetResourceAsImage("color_wheel.png");
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canvas->drawImage(opaqueImage, 0.0f, 0.0f);
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canvas->drawImage(make_color_space(opaqueImage, wideGamut, behavior), 128.0f, 0.0f);
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canvas->drawImage(make_color_space(opaqueImage, wideGamutLinear, behavior), 256.0f, 0.0f);
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canvas->drawImage(premulImage, 0.0f, 128.0f);
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canvas->drawImage(make_color_space(premulImage, wideGamut, behavior), 128.0f, 128.0f);
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canvas->drawImage(make_color_space(premulImage, wideGamutLinear, behavior), 256.0f, 128.0f);
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canvas->translate(0.0f, 256.0f);
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// Raster images
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opaqueImage = make_raster_image("mandrill_128.png", behavior);
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premulImage = make_raster_image("color_wheel.png", behavior);
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canvas->drawImage(opaqueImage, 0.0f, 0.0f);
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canvas->drawImage(make_color_space(opaqueImage, wideGamut, behavior), 128.0f, 0.0f);
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canvas->drawImage(make_color_space(opaqueImage, wideGamutLinear, behavior), 256.0f, 0.0f);
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canvas->drawImage(premulImage, 0.0f, 128.0f);
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canvas->drawImage(make_color_space(premulImage, wideGamut, behavior), 128.0f, 128.0f);
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canvas->drawImage(make_color_space(premulImage, wideGamutLinear, behavior), 256.0f, 128.0f);
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}
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private:
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typedef skiagm::GM INHERITED;
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};
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DEF_GM(return new MakeCSGM;)
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