be more careful about OOB source pixels in the scanline rescaler, and

src/core/SkBitmapFilter.cpp

Index: src/core/SkBitmapFilter.cpp
diff --git a/src/core/SkBitmapFilter.cpp b/src/core/SkBitmapFilter.cpp
index f06662544e99f86eae6b402ee7ed1d4be5672cd3..8c11f7c4c5d4308039964464648d16cc084ee088 100644
--- a/src/core/SkBitmapFilter.cpp
+++ b/src/core/SkBitmapFilter.cpp
@@ -40,14 +40,14 @@ void highQualityFilter(ColorPacker pack, const SkBitmapProcState& s, int x, int
         SkScalar fr = 0, fg = 0, fb = 0, fa = 0;
 
         int y0 = SkClampMax(SkScalarCeilToInt(srcPt.fY-s.getBitmapFilter()->width()), maxY);
-        int y1 = SkClampMax(SkScalarFloorToInt(srcPt.fY+s.getBitmapFilter()->width()), maxY);
+        int y1 = SkClampMax(SkScalarFloorToInt(srcPt.fY+s.getBitmapFilter()->width()+1), maxY);
         int x0 = SkClampMax(SkScalarCeilToInt(srcPt.fX-s.getBitmapFilter()->width()), maxX);
-        int x1 = SkClampMax(SkScalarFloorToInt(srcPt.fX+s.getBitmapFilter()->width()), maxX);
+        int x1 = SkClampMax(SkScalarFloorToInt(srcPt.fX+s.getBitmapFilter()->width())+1, maxX);
 
-        for (int srcY = y0; srcY <= y1; srcY++) {
+        for (int srcY = y0; srcY < y1; srcY++) {
             SkScalar yWeight = s.getBitmapFilter()->lookupScalar((srcPt.fY - srcY));
 
-            for (int srcX = x0; srcX <= x1 ; srcX++) {
+            for (int srcX = x0; srcX < x1 ; srcX++) {
                 SkScalar xWeight = s.getBitmapFilter()->lookupScalar((srcPt.fX - srcX));
 
                 SkScalar combined_weight = SkScalarMul(xWeight, yWeight);