Publicly expose one accelerated swizzle.

include/core/SkSwizzle.h

Index: include/core/SkSwizzle.h
diff --git a/include/core/SkSwizzle.h b/include/core/SkSwizzle.h
new file mode 100644
index 0000000000000000000000000000000000000000..1969ce767350903d74e95b79817c5fed95d0e797
--- /dev/null
+++ b/include/core/SkSwizzle.h
@@ -0,0 +1,14 @@
+/*
+ * 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 SkSwizzle_DEFINED
+#define SkSwizzle_DEFINED
+
+/** Swizzles byte order of |count| 32-bit pixels.  */
+void SkSwizzleRGBAToBGRA(uint32_t* src, void* dest, int count);

[mtklein, 2016/03/23 17:02:34]

Let's write (uint32_t* dest, const uint32_t* src, int count).

[reed1, 2016/03/23 17:03:23]

// Swap the R and B bytes for each pixel/int32

Should the name reflect the symmetric/agnostic nature of the swizzle?

[tomhudson, 2016/03/23 17:25:50]

Done.

[tomhudson, 2016/03/23 17:25:50]

Done.

+
+#endif