| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkColorFilter.h" |
| #include "SkColorSpaceXformer.h" |
| #include "SkColorSpaceXform_Base.h" |
| #include "SkDrawLooper.h" |
| #include "SkGradientShader.h" |
| #include "SkImage_Base.h" |
| #include "SkImageFilter.h" |
| #include "SkImagePriv.h" |
| #include "SkMakeUnique.h" |
| |
| std::unique_ptr<SkColorSpaceXformer> SkColorSpaceXformer::Make(sk_sp<SkColorSpace> dst) { |
| std::unique_ptr<SkColorSpaceXform> fromSRGB = SkColorSpaceXform_Base::New( |
| SkColorSpace::MakeSRGB().get(), dst.get(), SkTransferFunctionBehavior::kIgnore); |
| if (!fromSRGB) { |
| return nullptr; |
| } |
| |
| auto xformer = std::unique_ptr<SkColorSpaceXformer>(new SkColorSpaceXformer()); |
| xformer->fDst = std::move(dst); |
| xformer->fFromSRGB = std::move(fromSRGB); |
| return xformer; |
| } |
| |
| sk_sp<SkImage> SkColorSpaceXformer::apply(const SkImage* src) { |
| return src->makeColorSpace(fDst, SkTransferFunctionBehavior::kIgnore); |
| } |
| |
| sk_sp<SkImage> SkColorSpaceXformer::apply(const SkBitmap& src) { |
| sk_sp<SkImage> image = SkMakeImageFromRasterBitmap(src, kNever_SkCopyPixelsMode); |
| if (!image) { |
| return nullptr; |
| } |
| |
| sk_sp<SkImage> xformed = image->makeColorSpace(fDst, SkTransferFunctionBehavior::kIgnore); |
| // We want to be sure we don't let the kNever_SkCopyPixelsMode image escape this stack frame. |
| SkASSERT(xformed != image); |
| return xformed; |
| } |
| |
| // Currently, SkModeColorFilter is the only color filter that holds a color. And |
| // SkComposeColorFilter is the only color filter that holds another color filter. If this |
| // changes, this function will need updating. |
| sk_sp<SkColorFilter> SkColorSpaceXformer::apply(const SkColorFilter* colorFilter) { |
| SkColor color; |
| SkBlendMode mode; |
| if (colorFilter->asColorMode(&color, &mode)) { |
| return SkColorFilter::MakeModeFilter(this->apply(color), mode); |
| } |
| |
| SkColorFilter* outer; |
| SkColorFilter* inner; |
| if (colorFilter->asACompose(&outer, &inner)) { |
| return SkColorFilter::MakeComposeFilter(this->apply(outer), this->apply(inner)); |
| } |
| |
| return sk_ref_sp(const_cast<SkColorFilter*>(colorFilter)); |
| } |
| |
| void SkColorSpaceXformer::apply(SkColor* xformed, const SkColor* srgb, int n) { |
| SkAssertResult(fFromSRGB->apply(SkColorSpaceXform::kBGRA_8888_ColorFormat, xformed, |
| SkColorSpaceXform::kBGRA_8888_ColorFormat, srgb, |
| n, kUnpremul_SkAlphaType)); |
| } |
| |
| SkColor SkColorSpaceXformer::apply(SkColor srgb) { |
| SkColor xformed; |
| this->apply(&xformed, &srgb, 1); |
| return xformed; |
| } |
| |
| const SkPaint& SkColorSpaceXformer::apply(const SkPaint& src) { |
| const SkPaint* result = &src; |
| auto get_dst = [&] { |
| if (result == &src) { |
| fDstPaint = src; |
| result = &fDstPaint; |
| } |
| return &fDstPaint; |
| }; |
| |
| // All SkColorSpaces have the same black point. |
| if (src.getColor() & 0xffffff) { |
| get_dst()->setColor(this->apply(src.getColor())); |
| } |
| |
| if (auto shader = src.getShader()) { |
| auto replacement = shader->makeColorSpace(this); |
| if (replacement.get() != shader) { |
| get_dst()->setShader(std::move(replacement)); |
| } |
| } |
| |
| if (auto cf = src.getColorFilter()) { |
| auto replacement = this->apply(cf); |
| if (replacement.get() != cf) { |
| get_dst()->setColorFilter(std::move(replacement)); |
| } |
| } |
| |
| if (auto looper = src.getDrawLooper()) { |
| auto replacement = looper->makeColorSpace(this); |
| if (replacement.get() != looper) { |
| get_dst()->setDrawLooper(std::move(replacement)); |
| } |
| } |
| |
| if (auto imageFilter = src.getImageFilter()) { |
| auto replacement = imageFilter->makeColorSpace(this); |
| if (replacement.get() != imageFilter) { |
| get_dst()->setImageFilter(std::move(replacement)); |
| } |
| } |
| |
| return *result; |
| } |
| |
| const SkPaint* SkColorSpaceXformer::apply(const SkPaint* src) { |
| return src ? &this->apply(*src) : nullptr; |
| } |