The proposal to merge lp:~widelands-dev/widelands/screenshot_from_backbuffer 
into lp:widelands has been updated.
Commit Message changed to:

- Write screenshot before swapping data into the backbuffer. Before this 
change, we used glReadPixels() which always reads the backbuffer, i.e. the last 
frame. Now we force a redraw when a screenshot is requested and save the 
screenshot from the freshly drawn backbuffer before it is swapped to the front.
- m_blub -> blub_ in class Graphic.
- removed Graphic::save_png, since it was a stateless wrapper for save_to_png().

For more details, see:
https://code.launchpad.net/~widelands-dev/widelands/screenshot_from_backbuffer/+merge/283043
-- 
Your team Widelands Developers is requested to review the proposed merge of 
lp:~widelands-dev/widelands/screenshot_from_backbuffer into lp:widelands.

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