3 files changed, 13 insertions, 0 deletions
diff --git a/src/image/SkImage.cpp b/src/image/SkImage.cpp
index 72285bd698..cc4419a904 100644
--- a/src/image/SkImage.cpp
+++ b/src/image/SkImage.cpp
@@ -411,6 +411,11 @@ void SkImage_unpinAsTexture(const SkImage* image, GrContext* ctx) {
     as_IB(image)->onUnpinAsTexture(ctx);
 }
 
+SkIRect SkImage_getSubset(const SkImage* image) {
+    SkASSERT(image);
+    return as_IB(image)->onGetSubset();
+}
+
 ///////////////////////////////////////////////////////////////////////////////////////////////////
 
 sk_sp<SkImage> SkImageMakeRasterCopyAndAssignColorSpace(const SkImage* src,
diff --git a/src/image/SkImage_Base.h b/src/image/SkImage_Base.h
index 2049fb3561..0d54a39471 100644
--- a/src/image/SkImage_Base.h
+++ b/src/image/SkImage_Base.h
@@ -38,6 +38,10 @@ public:
     virtual SkColorType onColorType() const = 0;
     virtual SkAlphaType onAlphaType() const = 0;
 
+    virtual SkIRect onGetSubset() const {
+        return { 0, 0, this->width(), this->height() };
+    }
+
     virtual bool onPeekPixels(SkPixmap*) const { return false; }
 
     virtual const SkBitmap* onPeekBitmap() const { return nullptr; }
diff --git a/src/image/SkImage_Lazy.cpp b/src/image/SkImage_Lazy.cpp
index 82d573d708..7914f58d3c 100644
--- a/src/image/SkImage_Lazy.cpp
+++ b/src/image/SkImage_Lazy.cpp
@@ -77,6 +77,10 @@ public:
         return fInfo.alphaType();
     }
 
+    SkIRect onGetSubset() const override {
+        return SkIRect::MakeXYWH(fOrigin.fX, fOrigin.fY, fInfo.width(), fInfo.height());
+    }
+
     bool onReadPixels(const SkImageInfo&, void*, size_t, int srcX, int srcY,
                       CachingHint) const override;
 #if SK_SUPPORT_GPU