Apply matrix early in draw bitmap

src/core/SkImageFilterUtils.cpp

Index: src/core/SkImageFilterUtils.cpp
diff --git a/src/core/SkImageFilterUtils.cpp b/src/core/SkImageFilterUtils.cpp
index a4ce51eb9101f2ceb336738d7c48220bab1e47af..8385fb446ae0726ade2ccfbad3250239e6209211 100644
--- a/src/core/SkImageFilterUtils.cpp
+++ b/src/core/SkImageFilterUtils.cpp
@@ -23,6 +23,11 @@ bool SkImageFilterUtils::WrapTexture(GrTexture* texture, int width, int height,
 bool SkImageFilterUtils::GetInputResultGPU(SkImageFilter* filter, SkImageFilter::Proxy* proxy,
                                            const SkBitmap& src, const SkMatrix& ctm,
                                            SkBitmap* result, SkIPoint* offset) {
+    // Ensure that GrContext calls under filterImage and filterImageGPU below will see an identity
+    // matrix with no clip and that the matrix, clip, and render target set before this function was
+    // called are restored before we return to the caller.
+    GrContext* context = src.getTexture()->getContext();
+    GrContext::AutoWideOpenIdentityDraw awoid(context, NULL);
     if (!filter) {
         *result = src;
         return true;
@@ -31,9 +36,7 @@ bool SkImageFilterUtils::GetInputResultGPU(SkImageFilter* filter, SkImageFilter:
     } else {
         if (filter->filterImage(proxy, src, ctm, result, offset)) {
             if (!result->getTexture()) {
-                GrContext* context = ((GrTexture *) src.getTexture())->getContext();
-                GrTexture* resultTex = GrLockAndRefCachedBitmapTexture(context,
-                    *result, NULL);
+                GrTexture* resultTex = GrLockAndRefCachedBitmapTexture(context, *result, NULL);
                 result->setPixelRef(new SkGrPixelRef(resultTex))->unref();
                 GrUnlockAndUnrefCachedBitmapTexture(resultTex);
             }