gui: implement blitting screen areas
So far we only supported blitting the whole screen from the shadow
fb to the framebuffer. Add a function to blit areas.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
1 parent 7c5937d commit cabfe34ca70acbb009ad94b2578fde99957472a7
@Sascha Hauer Sascha Hauer authored on 7 Aug 2015
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include/gui/graphic_utils.h
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lib/gui/graphic_utils.c