Implement SkXfermode image filter

gyp/effects.gypi

 # Include this gypi to include all 'effects' files
 # The parent gyp/gypi file must define:
 #       'skia_src_path'     e.g. skia/trunk/src
 #       'skia_include_path' e.g. skia/trunk/include
 #
 # The skia build defines these in common_variables.gypi.
 #
 {
   'sources': [
     '<(skia_src_path)/effects/Sk1DPathEffect.cpp',
     '<(skia_src_path)/effects/Sk2DPathEffect.cpp',
+    '<(skia_src_path)/effects/SkArithmeticMode.cpp',
     '<(skia_src_path)/effects/SkAvoidXfermode.cpp',
-    '<(skia_src_path)/effects/SkArithmeticMode.cpp',
     '<(skia_src_path)/effects/SkBicubicImageFilter.cpp',
     '<(skia_src_path)/effects/SkBitmapSource.cpp',
     '<(skia_src_path)/effects/SkBlendImageFilter.cpp',
     '<(skia_src_path)/effects/SkBlurDrawLooper.cpp',
     '<(skia_src_path)/effects/SkBlurMask.cpp',
     '<(skia_src_path)/effects/SkBlurMask.h',
     '<(skia_src_path)/effects/SkBlurImageFilter.cpp',
     '<(skia_src_path)/effects/SkBlurMaskFilter.cpp',
     '<(skia_src_path)/effects/SkColorFilters.cpp',
     '<(skia_src_path)/effects/SkColorFilterImageFilter.cpp',
     '<(skia_src_path)/effects/SkColorMatrix.cpp',
     '<(skia_src_path)/effects/SkColorMatrixFilter.cpp',
     '<(skia_src_path)/effects/SkCornerPathEffect.cpp',
     '<(skia_src_path)/effects/SkDashPathEffect.cpp',
     '<(skia_src_path)/effects/SkDiscretePathEffect.cpp',
     '<(skia_src_path)/effects/SkDisplacementMapEffect.cpp',
     '<(skia_src_path)/effects/SkEmbossMask.cpp',
     '<(skia_src_path)/effects/SkEmbossMask.h',
     '<(skia_src_path)/effects/SkEmbossMask_Table.h',
     '<(skia_src_path)/effects/SkEmbossMaskFilter.cpp',
     '<(skia_src_path)/effects/SkKernel33MaskFilter.cpp',
     '<(skia_src_path)/effects/SkLayerDrawLooper.cpp',
     '<(skia_src_path)/effects/SkLayerRasterizer.cpp',
     '<(skia_src_path)/effects/SkLerpXfermode.cpp',
     '<(skia_src_path)/effects/SkLightingImageFilter.cpp',
+    '<(skia_src_path)/effects/SkMagnifierImageFilter.cpp',
     '<(skia_src_path)/effects/SkMatrixConvolutionImageFilter.cpp',
     '<(skia_src_path)/effects/SkMergeImageFilter.cpp',
     '<(skia_src_path)/effects/SkMorphologyImageFilter.cpp',
     '<(skia_src_path)/effects/SkOffsetImageFilter.cpp',
     '<(skia_src_path)/effects/SkPaintFlagsDrawFilter.cpp',
     '<(skia_src_path)/effects/SkPerlinNoiseShader.cpp',
     '<(skia_src_path)/effects/SkPixelXorXfermode.cpp',
     '<(skia_src_path)/effects/SkPorterDuff.cpp',
     '<(skia_src_path)/effects/SkRectShaderImageFilter.cpp',
     '<(skia_src_path)/effects/SkStippleMaskFilter.cpp',
     '<(skia_src_path)/effects/SkTableColorFilter.cpp',
     '<(skia_src_path)/effects/SkTableMaskFilter.cpp',
     '<(skia_src_path)/effects/SkTestImageFilters.cpp',
     '<(skia_src_path)/effects/SkTransparentShader.cpp',
-    '<(skia_src_path)/effects/SkMagnifierImageFilter.cpp',
+    '<(skia_src_path)/effects/SkXfermodeImageFilter.cpp',
 
     '<(skia_src_path)/effects/gradients/SkBitmapCache.cpp',
     '<(skia_src_path)/effects/gradients/SkBitmapCache.h',
     '<(skia_src_path)/effects/gradients/SkClampRange.cpp',
     '<(skia_src_path)/effects/gradients/SkClampRange.h',
     '<(skia_src_path)/effects/gradients/SkRadialGradient_Table.h',
     '<(skia_src_path)/effects/gradients/SkGradientShader.cpp',
     '<(skia_src_path)/effects/gradients/SkGradientShaderPriv.h',
     '<(skia_src_path)/effects/gradients/SkLinearGradient.cpp',
     '<(skia_src_path)/effects/gradients/SkLinearGradient.h',
     '<(skia_src_path)/effects/gradients/SkRadialGradient.cpp',
     '<(skia_src_path)/effects/gradients/SkRadialGradient.h',
     '<(skia_src_path)/effects/gradients/SkTwoPointRadialGradient.cpp',
     '<(skia_src_path)/effects/gradients/SkTwoPointRadialGradient.h',
     '<(skia_src_path)/effects/gradients/SkTwoPointConicalGradient.cpp',
     '<(skia_src_path)/effects/gradients/SkTwoPointConicalGradient.h',
     '<(skia_src_path)/effects/gradients/SkSweepGradient.cpp',
     '<(skia_src_path)/effects/gradients/SkSweepGradient.h',
 
     '<(skia_include_path)/effects/Sk1DPathEffect.h',
     '<(skia_include_path)/effects/Sk2DPathEffect.h',
+    '<(skia_include_path)/effects/SkXfermodeImageFilter.h',
+    '<(skia_include_path)/effects/SkArithmeticMode.h',
     '<(skia_include_path)/effects/SkAvoidXfermode.h',
-    '<(skia_include_path)/effects/SkArithmeticMode.h',
     '<(skia_include_path)/effects/SkBitmapSource.h',
     '<(skia_include_path)/effects/SkBlendImageFilter.h',
     '<(skia_include_path)/effects/SkBlurDrawLooper.h',
     '<(skia_include_path)/effects/SkBlurImageFilter.h',
     '<(skia_include_path)/effects/SkBlurMaskFilter.h',
     '<(skia_include_path)/effects/SkColorMatrix.h',
     '<(skia_include_path)/effects/SkColorMatrixFilter.h',
     '<(skia_include_path)/effects/SkColorFilterImageFilter.h',
     '<(skia_include_path)/effects/SkCornerPathEffect.h',
     '<(skia_include_path)/effects/SkDashPathEffect.h',
@@ skipping 20 matching lines @@
     '<(skia_include_path)/effects/SkTransparentShader.h',
     '<(skia_include_path)/effects/SkMagnifierImageFilter.h',
   ],
 }
 
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