Re: [ft-devel] Contribution to freetype

[Parth Wazurkar]

Hi,

For the project, I am thinking of the following approach:
I will have to modify the internal freetype files which provide the support to the new font format drivers. Further, I will have to implement new drivers for gf, pk, tfm and vf font formats for freetype. For the drivers I will take reference from the available drivers in VFlib and implement them for freetype on the lines of already available bdf font format driver.

I have an idea on how to progress for the coding part. I want to ask if this approach is correct? and do you suggest any modifications so that I can come up with a detailed proposal asap which we can discuss further.

I recognize that for the `vf` font format support it is tagged as 'hard' and I fear I may have missed things that might make it more difficult than I imagined. I would really appreciate any guidance or comments.

Regards

Parth

On Fri, Mar 16, 2018 at 9:31 AM, Parth Wazurkar <address@hidden> wrote:

Thank you so much Ewald.

I'll check that out.

Regards

Parth

On Fri, Mar 16, 2018 at 9:13 AM, Ewald Hew <address@hidden> wrote:

Hi Parth,

> I am unable to figure out the working of `FT_Face_InitFunc` in the `ftdrv.h`
> file.
> particularly, how does the call to `init_face` function invokes the
> particular font format's driver.
> Please help.

I suggest you read the article here
<https://www.freetype.org/freetype2/docs/design/design-6.html>, which
goes into some detail about how interfaces are being implemented in
FreeType.

Basically, `FT_Face_InitFunc' is a function pointer type (with its
signature), through which the driver-specific implementation of
`init_face' can be set, per module. Look up the `FT_DEFINE_DRIVER'
macro and where it's being used.

Ewald