Fleshed out GPU portion of image/surface feature
https://codereview.appspot.com/6813055/
git-svn-id: http://skia.googlecode.com/svn/trunk@6214 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/image/SkImagePriv.h b/src/image/SkImagePriv.h
index 9332abc..3210cae 100644
--- a/src/image/SkImagePriv.h
+++ b/src/image/SkImagePriv.h
@@ -55,4 +55,14 @@
// in which case the surface may need to perform a copy-on-write.
extern SkPixelRef* SkBitmapImageGetPixelRef(SkImage* rasterImage);
+// Given an image created with NewTexture, return its GrTexture. This
+// may be called to see if the surface and the image share the same GrTexture,
+// in which case the surface may need to perform a copy-on-write.
+extern GrTexture* SkTextureImageGetTexture(SkImage* rasterImage);
+
+// Update the texture wrapped by an image created with NewTexture. This
+// is called when a surface and image share the same GrTexture and the
+// surface needs to perform a copy-on-write
+extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture);
+
#endif