| /* |
| * Copyright 2016 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SkColorSpace_DEFINED |
| #define SkColorSpace_DEFINED |
| |
| #include "SkMatrix44.h" |
| #include "SkRefCnt.h" |
| |
| class SkData; |
| |
| class SK_API SkColorSpace : public SkRefCnt { |
| public: |
| |
| /** |
| * Common, named profiles that we can recognize. |
| */ |
| enum Named : uint8_t { |
| /** |
| * By far the most common color space. |
| * This is the default space for images, unmarked content, and monitors. |
| */ |
| kSRGB_Named, |
| |
| /** |
| * Very common wide gamut color space. |
| * Often used by images and monitors. |
| */ |
| kAdobeRGB_Named, |
| |
| /** |
| * Colorspace with the sRGB primaries, but a linear (1.0) gamma. Commonly used for |
| * half-float surfaces, and high precision individual colors (gradient stops, etc...) |
| */ |
| kSRGBLinear_Named, |
| }; |
| |
| enum RenderTargetGamma : uint8_t { |
| kLinear_RenderTargetGamma, |
| |
| /** |
| * Transfer function is the canonical sRGB curve, which has a short linear segment |
| * followed by a 2.4f exponential. |
| */ |
| kSRGB_RenderTargetGamma, |
| }; |
| |
| /** |
| * Create an SkColorSpace from a transfer function and a color gamut transform to D50 XYZ. |
| */ |
| static sk_sp<SkColorSpace> NewRGB(RenderTargetGamma gamma, const SkMatrix44& toXYZD50); |
| |
| /** |
| * Create a common, named SkColorSpace. |
| */ |
| static sk_sp<SkColorSpace> NewNamed(Named); |
| |
| /** |
| * Create an SkColorSpace from an ICC profile. |
| */ |
| static sk_sp<SkColorSpace> NewICC(const void*, size_t); |
| |
| /** |
| * Create an SkColorSpace with the same gamut as this color space, but with linear gamma. |
| */ |
| sk_sp<SkColorSpace> makeLinearGamma(); |
| |
| /** |
| * Returns the matrix used to transform src gamut to XYZ D50. |
| */ |
| const SkMatrix44& toXYZD50() const { return fToXYZD50; } |
| |
| /** |
| * Returns true if the color space gamma is near enough to be approximated as sRGB. |
| */ |
| bool gammaCloseToSRGB() const; |
| |
| /** |
| * Returns true if the color space gamma is linear. |
| */ |
| bool gammaIsLinear() const; |
| |
| /** |
| * Returns nullptr on failure. Fails when we fallback to serializing ICC data and |
| * the data is too large to serialize. |
| */ |
| sk_sp<SkData> serialize() const; |
| |
| /** |
| * If |memory| is nullptr, returns the size required to serialize. |
| * Otherwise, serializes into |memory| and returns the size. |
| */ |
| size_t writeToMemory(void* memory) const; |
| |
| static sk_sp<SkColorSpace> Deserialize(const void* data, size_t length); |
| |
| /** |
| * If both are null, we return true. If one is null and the other is not, we return false. |
| * If both are non-null, we do a deeper compare. |
| */ |
| static bool Equals(const SkColorSpace* src, const SkColorSpace* dst); |
| |
| protected: |
| SkColorSpace(const SkMatrix44& toXYZD50); |
| |
| const SkMatrix44 fToXYZD50; |
| }; |
| |
| #endif |