Re: [Freetype] FreeType feature request: export font properties

[David Turner]

Hi Juliusz,

Juliusz Chroboczek wrote:
> Dear all,
>
> Please accept my best wishes for the new year.
>
> Both the BDF and PCF backends parse font properties (font-level
> metrics) but don't export them to the client.  I would like to request
> a supported interface to get at these data.  I'm attaching the
> somewhat hackish code that I'm currently using.
>
> Additionally, an interface to enumerate all properties in a font might
> turn out to be useful in the future (but I don't need it right now).
I've started working on this on my machine, but I doubt it will make
it for 2.1.4 which should appear this week-end. Probably for next week
though...

the new API will be added to FT_BDH_H, since properties are BDF concepts
(and PCF are compressed BDF files), this to prevent yet another public
source :-)

Cheers,

- David Turner
- The FreeType Project  (www.freetype.org)

> Thanks a lot,
>
>                                         Juliusz
>
> #define PROP_ATOM 1
> #define PROP_INTEGER 2
> #define PROP_CARDINAL 3
>
> typedef union _FontProperty {
>     char *atom;
>     long int32;
>     unsigned long card32;
> } FontProperty;
>
> static int
> fontType(FT_Face face, char *name)
> {
>     if(face && face->driver) {
>         FT_Module driver = (FT_Module)face->driver;
>         if(driver->clazz && driver->clazz->module_name) {
>             if(strcmp(driver->clazz->module_name, name) == 0)
>                 return 1;
>         }
>     }
>     return 0;
> }
>
> int
> faceProperty(FT_Face face, char *name,
>              int *type_return, FontProperty *prop_return)
> {
>     int i;
>     if(fontType(face, "pcf")) {
>         PCF_Face pf = (PCF_Face)face;
>         for(i = 0; i < pf->nprops; i++) {
>             if(strcmp(pf->properties[i].name, name) == 0) {
>                 if(type_return)
>                     *type_return = 
>                         pf->properties[i].isString ? PROP_ATOM : PROP_INTEGER;
>                 *prop_return = *(FontProperty*)&pf->properties[i].value;
>                 return 1;
>             }
>         }
>         return 0;
>     } else if(fontType(face, "bdf")) {
>         BDF_Face bf = (BDF_Face)face;
>         for(i = 0; i < bf->bdffont->props_used; i++) {
>             if(strcmp(bf->bdffont->props[i].name, name) == 0) {
>                 if(type_return)
>                     *type_return = bf->bdffont->props[i].format;
>                 *prop_return = *(FontProperty*)&bf->bdffont->props[i].value;
>                 return 1;
>             }
>         }
>         return 0;
>     }
>     return -1;
> }
>
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