Parse A2B0 tag on ICC profiles

src/core/SkColorSpace.h

 /*
  * 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
 
@@ skipping 17 matching lines @@
 
     void dump() const;
 };
 
 struct SkFloat3x3 {
     float fMat[9];
 
     void dump() const;
 };
 
+struct SkColorLookUpTable {
+    static const uint8_t kMaxChannels = 16;
+
+    uint8_t                  fInputChannels;
+    uint8_t                  fOutputChannels;
+    uint8_t                  fGridPoints[kMaxChannels];
+    std::unique_ptr<float[]> fTable;
+
+    SkColorLookUpTable() {
+        memset(this, 0, sizeof(struct SkColorLookUpTable));
+    }
+
+    SkColorLookUpTable(SkColorLookUpTable&& that)
+        : fInputChannels(that.fInputChannels)
+        , fOutputChannels(that.fOutputChannels)
+        , fTable(std::move(that.fTable))
+    {
+        memcpy(fGridPoints, that.fGridPoints, kMaxChannels);
+    }
+};
+
 struct SkPM4f;
 void SkApply3x3ToPM4f(const SkFloat3x3&, const SkPM4f src[], SkPM4f dst[], int count);
 
 class SkColorSpace : public SkRefCnt {
 public:
     enum Named {
         kUnknown_Named,
         kDevice_Named,
         kSRGB_Named,
     };
 
     /**
      *  Return a colorspace instance, given a 3x3 transform from linear_RGB to D50_XYZ
      *  and the src-gamma, return a ColorSpace
      */
     static sk_sp<SkColorSpace> NewRGB(const SkFloat3x3& toXYZD50, const SkFloat3& gamma);
 
     static sk_sp<SkColorSpace> NewNamed(Named);
     static sk_sp<SkColorSpace> NewICC(const void*, size_t);
 
     SkFloat3 gamma() const { return fGamma; }
     SkFloat3x3 xyz() const { return fToXYZD50; }
+    SkFloat3 xyzOffset() const { return fToXYZOffset; }
     Named named() const { return fNamed; }
     uint32_t uniqueID() const { return fUniqueID; }
 
     enum Result {
         kFailure_Result,
         kIdentity_Result,
         kNormal_Result,
     };
 
     /**
      *  Given a src and dst colorspace, return the 3x3 matrix that will convert src_linear_RGB
      *  values into dst_linear_RGB values.
      */
     static Result Concat(const SkColorSpace* src, const SkColorSpace* dst, SkFloat3x3* result);
 
     static void Test();
     void dump() const;
 
-protected:
-    SkColorSpace(const SkFloat3x3& toXYZ, const SkFloat3& gamma, Named);
+private:
+    SkColorSpace(const SkFloat3& gamma, const SkFloat3x3& toXYZ, Named);
 
-private:
-    const SkFloat3x3 fToXYZD50;
-    const SkFloat3   fGamma;
-    const uint32_t   fUniqueID;
-    const Named      fNamed;
+    SkColorSpace(SkColorLookUpTable colorLUT, const SkFloat3& gamma, const SkFloat3x3& toXYZ,
+                 const SkFloat3& toXYZOffset);
+
+    const SkColorLookUpTable fColorLUT;
+    const SkFloat3           fGamma;
+    const SkFloat3x3         fToXYZD50;
+    const SkFloat3           fToXYZOffset;
+
+    const uint32_t           fUniqueID;
+    const Named              fNamed;
 };
 
 #endif