Make filters use SkImage instead of SkBitmap

src/effects/SkBitmapSource.cpp

Index: src/effects/SkBitmapSource.cpp
diff --git a/src/effects/SkBitmapSource.cpp b/src/effects/SkBitmapSource.cpp
index fc86f194b059909651518d6c29da3413c316e36b..6e7a6c7aa42dccfa44f3bf81b14ebe58aa76c65e 100644
--- a/src/effects/SkBitmapSource.cpp
+++ b/src/effects/SkBitmapSource.cpp
@@ -6,11 +6,12 @@
  */
 
 #include "SkBitmapSource.h"
-#include "SkDevice.h"
 #include "SkCanvas.h"
+#include "SkDevice.h"
+#include "SkImagePriv.h"
 #include "SkReadBuffer.h"
-#include "SkWriteBuffer.h"
 #include "SkValidationUtils.h"
+#include "SkWriteBuffer.h"
 
 SkBitmapSource::SkBitmapSource(const SkBitmap& bitmap)
   : INHERITED(0, 0)
@@ -43,14 +44,18 @@ void SkBitmapSource::flatten(SkWriteBuffer& buffer) const {
     buffer.writeBitmap(fBitmap);
 }
 
-bool SkBitmapSource::onFilterImage(Proxy* proxy, const SkBitmap&, const Context& ctx,
-                                   SkBitmap* result, SkIPoint* offset) const {
+bool SkBitmapSource::onFilterImage(Proxy* proxy, const SkImage*, const Context& ctx,
+                                   SkAutoTUnref<const SkImage>& result, SkIPoint* offset) const {
     SkRect bounds, dstRect;
     fBitmap.getBounds(&bounds);
     ctx.ctm().mapRect(&dstRect, fDstRect);
     if (fSrcRect == bounds && dstRect == bounds) {
         // No regions cropped out or resized; return entire bitmap.
-        *result = fBitmap;
+        SkImage* image = SkNewImageFromBitmap(fBitmap, NULL);
+        if (NULL == image) {
+            return false;
+        }
+        result.reset(image);
         offset->fX = offset->fY = 0;
         return true;
     }
@@ -74,7 +79,12 @@ bool SkBitmapSource::onFilterImage(Proxy* proxy, const SkBitmap&, const Context&
         SkPaint::kNone_FilterLevel : SkPaint::kHigh_FilterLevel);
     canvas.drawBitmapRectToRect(fBitmap, &fSrcRect, dstRect, &paint);
 
-    *result = device.get()->accessBitmap(false);
+    SkImage* image = device->newImageSnapshot();
+    if (NULL == image) {
+        return false;
+    }
+    result.reset(image);
+
     offset->fX = dstIRect.fLeft;
     offset->fY = dstIRect.fTop;
     return true;