Add a src rect to drawImageLattice() API

src/core/SkCanvas.cpp

Index: src/core/SkCanvas.cpp
diff --git a/src/core/SkCanvas.cpp b/src/core/SkCanvas.cpp
index 33d1deee60783807bd8db88a54a2267a47226f0a..d78222d1c9e6e9e14977a2c3b0bc70d0cb86f11c 100644
--- a/src/core/SkCanvas.cpp
+++ b/src/core/SkCanvas.cpp
@@ -2010,8 +2010,16 @@ void SkCanvas::drawImageLattice(const SkImage* image, const Lattice& lattice, co
     if (dst.isEmpty()) {
         return;
     }
-    if (SkLatticeIter::Valid(image->width(), image->height(), lattice)) {
-        this->onDrawImageLattice(image, lattice, dst, paint);
+
+    SkIRect bounds;
+    Lattice latticePlusBounds = lattice;
+    if (!latticePlusBounds.fBounds) {
+        bounds = SkIRect::MakeWH(image->width(), image->height());
+        latticePlusBounds.fBounds = &bounds;
+    }
+
+    if (SkLatticeIter::Valid(image->width(), image->height(), latticePlusBounds)) {
+        this->onDrawImageLattice(image, latticePlusBounds, dst, paint);
     } else {
         this->drawImageRect(image, dst, paint);
     }
@@ -2060,8 +2068,16 @@ void SkCanvas::drawBitmapLattice(const SkBitmap& bitmap, const Lattice& lattice,
     if (bitmap.drawsNothing() || dst.isEmpty()) {
         return;
     }
-    if (SkLatticeIter::Valid(bitmap.width(), bitmap.height(), lattice)) {
-        this->onDrawBitmapLattice(bitmap, lattice, dst, paint);
+
+    SkIRect bounds;
+    Lattice latticePlusBounds = lattice;
+    if (!latticePlusBounds.fBounds) {
+        bounds = SkIRect::MakeWH(bitmap.width(), bitmap.height());
+        latticePlusBounds.fBounds = &bounds;
+    }
+
+    if (SkLatticeIter::Valid(bitmap.width(), bitmap.height(), latticePlusBounds)) {
+        this->onDrawBitmapLattice(bitmap, latticePlusBounds, dst, paint);
     } else {
         this->drawBitmapRect(bitmap, dst, paint);
     }