More general version of image filtering; reworked to be robust and easier to SSE

src/opts/SkBitmapFilter_opts_SSE2.h

Index: src/opts/SkBitmapFilter_opts_SSE2.h
diff --git a/src/opts/SkBitmapFilter_opts_SSE2.h b/src/opts/SkBitmapFilter_opts_SSE2.h
new file mode 100644
index 0000000000000000000000000000000000000000..3a3aec867e9a5f92e8a209cc8ed9a15926ea34d6
--- /dev/null
+++ b/src/opts/SkBitmapFilter_opts_SSE2.h
@@ -0,0 +1,15 @@
+
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+
+#include "SkBitmapProcState.h"
+
+void highQualityFilter_ScaleOnly_SSE2(const SkBitmapProcState &s, int x, int y,
+                          SkPMColor *SK_RESTRICT colors, int count);
+void highQualityFilter_SSE2(const SkBitmapProcState &s, int x, int y,
+                SkPMColor *SK_RESTRICT colors, int count);