RFR: 8074844 : Resolve disabled warnings for libfontmanager

[Magnus Ihse Bursie]

On 2020-08-27 21:39, Philip Race wrote:
> Bug : https://bugs.openjdk.java.net/browse/JDK-8074844
> Webrev : http://cr.openjdk.java.net/~prr/8074844/index.html
Looks good to me.

Thank you Phil for cleaning this up!

/Magnus

>
> This resolves the disabled compiler warnings in what is now quite a 
> small fontmanager library.
>
> I've built windows, mac and linux in our build system and run our full 
> battery of automated tests and sanity checked manual.
>
> A quick run down of how the warnings map to the changes
>
>       DISABLED_WARNINGS_clang := sign-compare,
>
>       DISABLED_WARNINGS_gcc := sign-compare unused-function 
> int-to-pointer-cast,
>
> Sign compare in both of the above are the reason for the majority of 
> the changes in freetypeScaler.c
> and also the change in hb-jdk.h
>
>
> unused-function was _free_nothing in
> src/java.desktop/share/native/libfontmanager/hb-jdk-font.cc
>
>
> int-to-pointer-cast was an issue for 32 bit as raised here 
> https://bugs.openjdk.java.net/browse/JDK-8250605
> when a previous removal broke 32 bit Linux. Since we don't build or 
> test that I was flying in the dark here
> using the warnings from that bug. The changes for this are those in
>
> src/java.desktop/share/native/libfontmanager/DrawGlyphList.c
> src/java.desktop/unix/native/libfontmanager/X11FontScaler.c
>
>
>       DISABLED_WARNINGS_microsoft := 4018 4146 4244 4996,
>
> The unique windows warnings were
> ./open/src/java.desktop/share/native/libfontmanager/HBShaper.c(216): 
> error C2220: the following warning is treated as an error
>  ./open/src/java.desktop/share/native/libfontmanager/HBShaper.c(216): 
> warning C4244: '=': conversion from 'jlong' to 'long', possible loss 
> of data
>
>  ./open/src/java.desktop/share/native/libfontmanager/freetypeScaler.c(1216): 
> error C2220: the following warning is treated as an error
>  ./open/src/java.desktop/share/native/libfontmanager/freetypeScaler.c(1216): 
> warning C4146: unary minus operator applied to unsigned type, result 
> still unsigned
>
> ./open/src/java.desktop/windows/native/libfontmanager/lcdglyph.c(128): 
> error C2220: the following warning is treated as an error
> [ 
> ./open/src/java.desktop/windows/native/libfontmanager/lcdglyph.c(128): 
> warning C4996: 'GetVersion': was declared deprecated
>
> GetVersion isn't needed any more since we aren't likely to be running 
> on anything older than XP !
>
> -phil.
>
>
>
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