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libwebp: Unicode command tools on Windows

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Define macros in examples/unicode.h to use Unicode argv
on Windows. Keep char everywhere on Unix since it handles
UTF-8 without any change.

Impact:
 - All fopen () and SHCreateStreamOnFile(),
 - All fprintf() printing file paths,
 - All strcmp() used with "-",
 - File path parsing,
 - Gif reading.

Concerned executables from examples/ and extras/:
  anim_diff, anim_dump, vwebp, vwebp_sdl,
  cwebp, dwebp, gif2webp, img2webp,
  webpmux, webpinfo, webp_quality, get_disto

When compiled on Windows with Unicode enabled, webpmux and
img2webp will not work when used with an argument file and
will print "Reading arguments from a file is a feature
unavailable with Unicode binaries."

BUG=webp:398

Change-Id: Ic55d222a3ce1a715f9c4cce57ecbe2705d5ce317
This commit is contained in:
Yannis Guyon
2018-10-16 11:03:18 +02:00
parent 5030e90278
commit 9cf9841b5e
23 changed files with 485 additions and 214 deletions
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README
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@ -136,6 +136,8 @@ cmake -DWEBP_BUILD_CWEBP=ON -DWEBP_BUILD_DWEBP=ON ../
or through your favorite interface (like ccmake or cmake-qt-gui).
Use option -DWEBP_UNICODE=ON for Unicode support on Windows (with chcp 65001).
Finally, once installed, you can also use WebP in your CMake project by doing:
find_package(WebP)