Is the reason that the loading funtions in BitmapFactory always return
immutable bitmaps by design?
I tracked the actual setting to Immutable down to the following code
in the last part of the doDecode function in the BitmapFactory.cpp
file:
// promise we will never change our pixels (great for sharing and
pictures)
SkPixelRef* ref = bitmap->pixelRef();
SkASSERT(ref);
ref->setImmutable();
It would be great to have an option in BitmapFactory.Options where you
can set that you want a mutable bitmap. This way when you want to edit
the bitmap that you open you don't have to copy it, saving a lot of
memory, especially for large bitmaps.
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