Move createColorSpaceFilter from ImageBuffer to ColorSpaceUtilities

Source/platform/graphics/ColorSpace.h

 /*
  * Copyright (C) 2009 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 10 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef ColorSpace_h
 #define ColorSpace_h
 
 #include "platform/PlatformExport.h"
 #include "platform/graphics/Color.h"
+#include "wtf/PassRefPtr.h"
+
+class SkColorFilter;
 
 namespace blink {
 
 enum ColorSpace {
     ColorSpaceDeviceRGB,
     ColorSpaceSRGB,
     ColorSpaceLinearRGB
 };
 
 namespace ColorSpaceUtilities {
 
 // Get a pointer to a 8-bit lookup table that will convert color components
 // in the |srcColorSpace| to the |dstColorSpace|.
 // If the conversion cannot be performed, or is a no-op (identity transform),
 // then 0 is returned.
 // (Note that a round-trip - f(B,A)[f(A,B)[x]] - is not lossless in general.)
 const uint8_t* getConversionLUT(ColorSpace dstColorSpace, ColorSpace srcColorSpace = ColorSpaceDeviceRGB);
 
 // Convert a Color assumed to be in the |srcColorSpace| into the |dstColorSpace|.
 Color convertColor(const Color& srcColor, ColorSpace dstColorSpace, ColorSpace srcColorSpace = ColorSpaceDeviceRGB);
 
+// Create a color filter that will convert from |srcColorSpace| into |dstColorSpace|.
+PassRefPtr<SkColorFilter> createColorSpaceFilter(ColorSpace srcColorSpace, ColorSpace dstColorSpace);
+
 } // namespace ColorSpaceUtilities
 
 } // namespace blink
 
 #endif // ColorSpace_h