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wrlib: move fixed angle rotation code to dedicated functions

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The function RRotateImage contains code to handle efficiently the 4 simple
angles 0, 90, 180 and 270 degrees, which makes it a long function.

This patch separate the code for the different cases into dedicated
functions so the main function's code ends up being simple (aka: easier to
understand/review/maintain).

As a side effect, the function for the 180 degree function is not static
because it can be reused to flip an image both horizontally and vertically.

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
This commit is contained in:
Christophe CURIS
2014-07-04 23:28:34 +02:00
committed by Carlos R. Mafra
parent be5d04525d
commit f85066a19e
3 changed files with 181 additions and 117 deletions
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1
wrlib/Makefile.am
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@@ -35,6 +35,7 @@ libwraster_la_SOURCES = \
scale.c \
scale.h \
rotate.c \
rotate.h \
flip.c \
convolve.c \
save_xpm.c \