NEON Optimized RGBA->PMColor sampling in SkSwizzler

src/core/SkOpts.h

Index: src/core/SkOpts.h
diff --git a/src/core/SkOpts.h b/src/core/SkOpts.h
index c717526d17f2682f5511e76d2a0bda6af4a0855e..4c0c5bccc4f0c86ca114760a01a6e0352e783b64 100644
--- a/src/core/SkOpts.h
+++ b/src/core/SkOpts.h
@@ -66,7 +66,13 @@ namespace SkOpts {
                         grayA_to_RGBA,         // i.e. expand to color channels
                         grayA_to_rgbA,         // i.e. expand to color channels and premultiply
                         inverted_CMYK_to_RGB1, // i.e. convert color space
-                        inverted_CMYK_to_BGR1; // i.e. convert color space
+                        inverted_CMYK_to_BGR1, // i.e. convert color space
+                        RGBA_to_rgbA_sample2,  // i.e. premultiply, keep every 2nd other pixel
+                        RGBA_to_bgrA_sample2,  // i.e. premultiply, swap RB, keep every 2nd pixel
+                        RGBA_to_rgbA_sample4,  // i.e. premultiply, keep every 4th other pixel
+                        RGBA_to_bgrA_sample4,  // i.e. premultiply, swap RB, keep every 4th pixel
+                        RGBA_to_rgbA_sample8,  // i.e. premultiply, keep every 8th other pixel
+                        RGBA_to_bgrA_sample8;  // i.e. premultiply, swap RB, keep every 8th pixel
 
     extern void (*half_to_float)(float[], const uint16_t[], int);
     extern void (*float_to_half)(uint16_t[], const float[], int);