On Thursday, 17 September 2015 at 04:58:05 UTC, WhatMeWorry wrote:
Compiling and linking was error free, but when I hit
DerelictFT.load();
my program aborts with the following run time message:
derelict.util.exception.SymbolLoadException@source\derelict\util\exception.d(35):
Failed to load symbol FT_Reference_Face from shared library freetype.dll
This function was added to FreeType in version 2.4.2, so you will
see this error when trying to load an older version.
First of all, I'm not sure if I have a valid freetype.dll file.
How does one tell? I downloaded freetype-2.6 but couldn't find
anything there. I downloaded freetype-2.3.5 and found a
freetype6.dll which I renamed to freetype.dll because that was
want an online discussion said.
DerelictFT currently requires FreeType 2.5 or later (though I've
not yet looked into updating to the 2.6 API). What problem did
you have with the 2.6 binary you downloaded?
Using the 2.3.5 and 2.4.2 binaries is bound to result in
SymbolLoadExceptions, as any functions added in 2.5 will not be
present in those binaries. You can work around this by building
your own if you can't find anything precompiled online, but if
you aren't using any 2.5 features, I would suggest you look into
using DerelictUtil's selective symbol loading mechanism[1].
You'll need to decide a minimum version of FreeType to support,
then diff the headers from that version with later releases to
see which functions were added in later versions. Check for those
functions in a MissingSymbolCallback and you can load without any
SymbolLoadExceptions.
Also, an alternative to renaming the DLL is to pass the name
directly to the loader:
Version(Windows) DerelictFT.load("freetype6.dll");
else DerelictFT.load();
[1] http://derelictorg.github.io/using/fail.html
