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wrlib: Added support for webp image

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This patch is adding support for google webp image format, if you
don't know it a quick recap is to say that according to their tests
they claim it is better than png and jpeg.

Follow the link below for some more details:
https://developers.google.com/speed/webp/

Signed-off-by: Carlos R. Mafra <crmafra@gmail.com>
This commit is contained in:
David Maciejak
2014-04-05 22:51:03 +02:00
committed by Carlos R. Mafra
parent de1421394c
commit 050cae3bd2
6 changed files with 207 additions and 2 deletions
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23
m4/wm_imgfmt_check.m4
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@@ -174,6 +174,29 @@ AC_DEFUN_ONCE([WM_IMGFMT_CHECK_TIFF],
]) dnl AC_DEFUN
# WM_IMGFMT_CHECK_WEBP
# -------------------
#
# Check for WEBP file support through 'libwebp'
# The check depends on variable 'enable_webp' being either:
# yes - detect, fail if not found
# no - do not detect, disable support
# auto - detect, disable if not found
#
# When found, append appropriate stuff in GFXLIBS, and append info to
# the variable 'supported_gfx'
# When not found, append info to variable 'unsupported'
AC_DEFUN_ONCE([WM_IMGFMT_CHECK_WEBP],
[WM_LIB_CHECK([WEBP], ["-lwebp"], [VP8DecodeLayer], [$XLFLAGS $XLIBS],
[wm_save_CFLAGS="$CFLAGS"
AS_IF([wm_fn_lib_try_compile "webp/decode.h" "" "return 0" ""],
[],
[AC_MSG_ERROR([found $CACHEVAR but could not find appropriate header - are you missing libwebp-dev package?])])
CFLAGS="$wm_save_CFLAGS"],
[supported_gfx], [GFXLIBS])dnl
]) dnl AC_DEFUN
# WM_IMGFMT_CHECK_XPM
# -------------------
#