commit 7a47ad3bacb36ca7609490bd7cbd85d2c49a0042
author senorblanco@chromium.org <senorblanco@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> Wed Oct 30 21:57:04 2013 +0000
committer senorblanco@chromium.org <senorblanco@chromium.org@2bbb7eff-a529-9590-31e7-b0007b416f81> Wed Oct 30 21:57:04 2013 +0000
tree 375a48616970b64e1818808ff449c543af8aae84
parent 2d2e5c4e2425a1cb64d31d7d10832f4a3a9137a4

Implement SSE2-based implementations of the morphology filters (dilate & erode). This gives a 3-5X speedup over the naive implementation, and also mitigates a timing-based security attack in Chrome (https://code.google.com/p/chromium/issues/detail?id=251711).

NOTE: this will require a corresponding GYP change on the Skia roll into Chrome: https://codereview.chromium.org/52453004/

R=mtklein@google.com, reed@google.com

Review URL: https://codereview.chromium.org/52603004

git-svn-id: http://skia.googlecode.com/svn/trunk@12038 2bbb7eff-a529-9590-31e7-b0007b416f81

src/opts/opts_check_SSE2.cpp

diff --git a/src/opts/opts_check_SSE2.cpp b/src/opts/opts_check_SSE2.cpp
index 8f0bdac..b40ca9d 100644
--- a/src/opts/opts_check_SSE2.cpp
+++ b/src/opts/opts_check_SSE2.cpp
@@ -14,6 +14,8 @@
 #include "SkBlitRow_opts_SSE2.h"
 #include "SkUtils_opts_SSE2.h"
 #include "SkUtils.h"
+#include "SkMorphology_opts.h"
+#include "SkMorphology_opts_SSE2.h"
 
 #include "SkRTConf.h"
 
@@ -248,6 +250,24 @@
     }
 }
 
+SkMorphologyProc SkMorphologyGetPlatformProc(SkMorphologyProcType type) {
+    if (!cachedHasSSE2()) {
+        return NULL;
+    }
+    switch (type) {
+        case kDilateX_SkMorphologyProcType:
+            return SkDilateX_SSE2;
+        case kDilateY_SkMorphologyProcType:
+            return SkDilateY_SSE2;
+        case kErodeX_SkMorphologyProcType:
+            return SkErodeX_SSE2;
+        case kErodeY_SkMorphologyProcType:
+            return SkErodeY_SSE2;
+        default:
+            return NULL;
+    }
+}
+
 SkBlitRow::ColorRectProc PlatformColorRectProcFactory(); // suppress warning
 
 SkBlitRow::ColorRectProc PlatformColorRectProcFactory() {