Initial implementation of a SkColorSpace_A2B xform

src/core/SkColorSpace_Base.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_Base_DEFINED
 #define SkColorSpace_Base_DEFINED
 
+#include "SkColorLookUpTable.h"
 #include "SkColorSpace.h"
 #include "SkData.h"
 #include "SkOnce.h"
 #include "SkTemplates.h"
 
 enum SkGammaNamed : uint8_t {
     kLinear_SkGammaNamed,
     kSRGB_SkGammaNamed,
     k2Dot2Curve_SkGammaNamed,
     kNonStandard_SkGammaNamed,
@@ skipping 115 matching lines @@
     // Objects of this type are sometimes created in a custom fashion using
     // sk_malloc_throw and therefore must be sk_freed.  We overload new to
     // also call sk_malloc_throw so that memory can be unconditionally released
     // using sk_free in an overloaded delete. Overloading regular new means we
     // must also overload placement new.
     void* operator new(size_t size) { return sk_malloc_throw(size); }
     void* operator new(size_t, void* p) { return p; }
     void operator delete(void* p) { sk_free(p); }
 };
 
-struct SkColorLookUpTable : public SkRefCnt {
-    static constexpr uint8_t kOutputChannels = 3;
-
-    uint8_t                  fInputChannels;
-    uint8_t                  fGridPoints[3];
-
-    const float* table() const {
-        return SkTAddOffset<const float>(this, sizeof(SkColorLookUpTable));
-    }
-
-    SkColorLookUpTable(uint8_t inputChannels, uint8_t gridPoints[3])
-        : fInputChannels(inputChannels)
-    {
-        SkASSERT(3 == inputChannels);
-        memcpy(fGridPoints, gridPoints, 3 * sizeof(uint8_t));
-    }
-
-    // Objects of this type are created in a custom fashion using sk_malloc_throw
-    // and therefore must be sk_freed.
-    void* operator new(size_t size) = delete;
-    void* operator new(size_t, void* p) { return p; }
-    void operator delete(void* p) { sk_free(p); }
-};
-
 class SkColorSpace_Base : public SkColorSpace {
 public:
 
     /**
      *  Describes color space gamut as a transformation to XYZ D50.
      *  Returns nullptr if color gamut cannot be described in terms of XYZ D50.
      */
     virtual const SkMatrix44* toXYZD50() const = 0;
 
     /**
@@ skipping 67 matching lines @@
 
 static inline const SkColorSpace_Base* as_CSB(const SkColorSpace* colorSpace) {
     return static_cast<const SkColorSpace_Base*>(colorSpace);
 }
 
 static inline SkColorSpace_Base* as_CSB(const sk_sp<SkColorSpace>& colorSpace) {
     return static_cast<SkColorSpace_Base*>(colorSpace.get());
 }
 
 #endif