[GRASS5] 5.7: making Freetype optional

[glynn at gclements.plus.com]

Markus Neteler wrote:

> Making Freetype support optional:
> ... to do so, should I add tons of
> 
>   #include "config.h"
> 
>   #ifdef HAVE_FT2BUILD_H
>   ...
>   #endif
> 
> statements into the following files?
> 
> cvsgrass57/display/drivers/lib
>  command.c
>  font_freetype.c
>  Font_get.c
>  Get_t_box.c
>  Text.c
> 
> cvsgrass57/lib/raster
>  Font.c
> 
> Would appreciate a recommendation how to proceed.

display/drivers/lib/Text3.c appears to be the only file which depends
directly upon FreeType. Of the functions in that file:

+ The body of drawMain() should be conditionalised upon
HAVE_FT2BUILD_H, so that the function itself is a no-op if FreeType
isn't available.

+ Other functions which require FreeType should be conditionalised
upon HAVE_FT2BUILD_H, so that the function doesn't exist if FreeType
isn't available.

+ Functions which don't need to be exported (AFAICT, everything except
soft_text_freetype(), soft_text_ext_freetype() and get_text_ext_freetype())
should be declared "static".

The drivers and raster library will support the FONT_FREETYPE and
FONT_FREETYPE_RELEASE operations regardless of whether FreeType was
enabled, except that those operations won't actually work.

-- 
Glynn Clements <glynn at gclements.plus.com>