Comment 17 for bug 1368492

>>A side effect of this fix is that when you tap on a picture in the gallery app to
>>bring it full screen, pinch-to-zoom no longer works and there is other weirdness
>>(sometimes the image goes fully black). (As an aside, why is gallery even using the thumbnailer for this?
>> You need the entire image for proper zooming so why not just open it directly?)

You are correct. Ineed the gallery-app and camera-app are both using the thumbnail when opening the picture instead of using the picture directly. This is being tracked in this bug https://bugs.launchpad.net/gallery-app/+bug/1376767 and an MR already been submitted for camera-app.