1 files changed, 73 insertions, 0 deletions
diff --git a/include/core/SkICC.h b/include/core/SkICC.h
new file mode 100644
index 0000000000..3780498df9
--- /dev/null
+++ b/include/core/SkICC.h
@@ -0,0 +1,73 @@
+/*
+ * 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 SkICC_DEFINED
+#define SkICC_DEFINED
+
+#include "SkRefCnt.h"
+
+struct SkColorSpaceTransferFn;
+class SkColorSpace;
+class SkData;
+class SkMatrix44;
+
+class SK_API SkICC : public SkRefCnt {
+public:
+
+    /**
+     *  Parse an ICC profile.
+     *
+     *  Returns nullptr if the data is not a valid ICC profile or if the profile
+     *  input space is not RGB.
+     */
+    static sk_sp<SkICC> Make(const void*, size_t);
+
+    /**
+     *  If the gamut can be represented as transformation into XYZ D50, returns
+     *  true and sets the proper values in |toXYZD50|.
+     *
+     *  If not, returns false.  This indicates that the ICC data is too complex
+     *  to isolate a simple gamut transformation.
+     */
+    bool toXYZD50(SkMatrix44* toXYZD50) const;
+
+    /**
+     *  If the transfer function can be represented as coefficients to the standard
+     *  equation, returns true and sets |fn| to the proper values.
+     *
+     *  If not, returns false.  This indicates one of the following:
+     *  (1) The R, G, and B transfer functions are not the same.
+     *  (2) The transfer function is represented as a table that we have not managed
+     *      to match to a standard curve.
+     *  (3) The ICC data is too complex to isolate a single transfer function.
+     */
+    bool isNumericalTransferFn(SkColorSpaceTransferFn* fn) const;
+
+    /**
+     *  If the transfer function can be approximated as coefficients to the standard
+     *  equation, returns true and sets |fn| to the proper values.
+     *
+     *  If not, returns false.  This indicates one of the following:
+     *  (1) The R, G, and B transfer functions are not the same.
+     *  (2) The transfer function is represented as a table that is not increasing with
+     *      end points at zero and one.
+     *  (3) The ICC data is too complex to isolate a single transfer function.
+     */
+    bool approximateNumericalTransferFn(SkColorSpaceTransferFn* fn) const;
+
+    /**
+     *  Write an ICC profile with transfer function |fn| and gamut |toXYZD50|.
+     */
+    static sk_sp<SkData> WriteToICC(const SkColorSpaceTransferFn& fn, const SkMatrix44& toXYZD50);
+
+private:
+    SkICC(sk_sp<SkColorSpace> colorSpace);
+
+    sk_sp<SkColorSpace> fColorSpace;
+};
+
+#endif