Fix filter primitive bounds computations.

src/effects/SkDropShadowImageFilter.cpp

 /*
  * 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 "SkDropShadowImageFilter.h"
 
 #include "SkBitmap.h"
@@ skipping 98 matching lines @@
     shadowBounds.offset(fDx, fDy);
     shadowBounds.outset(SkScalarMul(fSigmaX, SkIntToScalar(3)),
                         SkScalarMul(fSigmaY, SkIntToScalar(3)));
     if (fShadowMode == kDrawShadowAndForeground_ShadowMode) {
         dst->join(shadowBounds);
     } else {
         *dst = shadowBounds;
     }
 }
 
-bool SkDropShadowImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
-                                             SkIRect* dst) const {
-    SkIRect bounds = src;
+void SkDropShadowImageFilter::onFilterNodeBounds(const SkIRect& src, const SkMatrix& ctm,
+                                                 SkIRect* dst, MapDirection direction) const {
+    *dst = src;
     SkVector offsetVec = SkVector::Make(fDx, fDy);
+    if (kReverse_MapDirection == direction) {
+        offsetVec.negate();
+    }
     ctm.mapVectors(&offsetVec, 1);
-    bounds.offset(-SkScalarCeilToInt(offsetVec.x()),
-                  -SkScalarCeilToInt(offsetVec.y()));
+    dst->offset(SkScalarCeilToInt(offsetVec.x()),
+                SkScalarCeilToInt(offsetVec.y()));
     SkVector sigma = SkVector::Make(fSigmaX, fSigmaY);
     ctm.mapVectors(&sigma, 1);
-    bounds.outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))),
-                  SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
+    dst->outset(SkScalarCeilToInt(SkScalarMul(sigma.x(), SkIntToScalar(3))),
+                SkScalarCeilToInt(SkScalarMul(sigma.y(), SkIntToScalar(3))));
     if (fShadowMode == kDrawShadowAndForeground_ShadowMode) {
-        bounds.join(src);
+        dst->join(src);
     }
-    if (getInput(0) && !getInput(0)->filterBounds(bounds, ctm, &bounds)) {
-        return false;
-    }
-    *dst = bounds;
-    return true;
 }
 
 #ifndef SK_IGNORE_TO_STRING
 void SkDropShadowImageFilter::toString(SkString* str) const {
     str->appendf("SkDropShadowImageFilter: (");
 
     str->appendf("dX: %f ", fDx);
     str->appendf("dY: %f ", fDy);
     str->appendf("sigmaX: %f ", fSigmaX);
     str->appendf("sigmaY: %f ", fSigmaY);
 
     str->append("Color: ");
     str->appendHex(fColor);
 
     static const char* gModeStrings[] = {
         "kDrawShadowAndForeground", "kDrawShadowOnly"
     };
 
     static_assert(kShadowModeCount == SK_ARRAY_COUNT(gModeStrings), "enum_mismatch");
 
     str->appendf(" mode: %s", gModeStrings[fShadowMode]);
 
     str->append(")");
 }
 #endif