Production quality fast image up/downsampler

src/core/SkBitmapProcState.h

Index: src/core/SkBitmapProcState.h
diff --git a/src/core/SkBitmapProcState.h b/src/core/SkBitmapProcState.h
index a644dd1e021c3453c2144bbc1aa203e48ff9176d..c4c4df2cf61a99ff5860f9a1a1772cf31e1c6516 100644
--- a/src/core/SkBitmapProcState.h
+++ b/src/core/SkBitmapProcState.h
@@ -31,6 +31,7 @@
 #endif
 
 class SkPaint;
+class SkConvolutionProcs;
 
 struct SkBitmapProcState {
 
@@ -59,7 +60,7 @@ struct SkBitmapProcState {
                                  const uint32_t[],
                                  int count,
                                  uint16_t colors[]);
-
+                                 
     typedef U16CPU (*FixedTileProc)(SkFixed);   // returns 0..0xFFFF
     typedef U16CPU (*FixedTileLowBitsProc)(SkFixed, int);   // returns 0..0xF
     typedef U16CPU (*IntTileProc)(int value, int count);   // returns 0..count-1
@@ -78,6 +79,8 @@ struct SkBitmapProcState {
     IntTileProc         fIntTileProcY;      // chooseProcs
     SkFixed             fFilterOneX;
     SkFixed             fFilterOneY;
+    
+    SkConvolutionProcs* fConvolutionProcs;         // possiblyScaleImage
 
     SkPMColor           fPaintPMColor;      // chooseProcs - A8 config
     SkFixed             fInvSx;             // chooseProcs
@@ -113,7 +116,12 @@ struct SkBitmapProcState {
         implementation can do nothing (see SkBitmapProcState_opts_none.cpp)
      */
     void platformProcs();
-
+    
+    /** Platforms can also optionally overwrite the convolution functions
+        if we have SIMD versions of them.
+      */
+      
+    void platformConvolutionProcs();
 
     /** Given the byte size of the index buffer to be passed to the matrix proc,
         return the maximum number of resulting pixels that can be computed
@@ -218,8 +226,6 @@ void ClampX_ClampY_nofilter_affine(const SkBitmapProcState& s,
 void S32_D16_filter_DX(const SkBitmapProcState& s,
                                    const uint32_t* xy, int count, uint16_t* colors);
 
-void highQualityFilter_ScaleOnly(const SkBitmapProcState &s, int x, int y,
-                             SkPMColor *SK_RESTRICT colors, int count);
 void highQualityFilter(const SkBitmapProcState &s, int x, int y,
                    SkPMColor *SK_RESTRICT colors, int count);