[cairo] cairo for 3D game/vision/graphics/simulation engine - practical questions

[Gerdus van Zyl]

On win32 at least freetype is not necessary.

On Wed, Jul 8, 2009 at 6:28 PM, Ralph Giles<giles at ghostscript.com> wrote:
> On Wed, Jul 8, 2009 at 12:23 AM, max<max at iceminds.com> wrote:
>
>>  We need to add text support to our 3D graphics application,
>>  and vector graphics would be an nice option to support too.
>>  We have a few practical startup/newbie questions before we
>>  make a final decision to adopt cairo/pango/freetype2, which
>>  presumably is what we need to render text string images to
>>  memory that is in fact a texture-map image.
>
> Note that you only need pango if you want to support complex scripts,
> and it has the most dependencies. If you just need support for
> (simple, not book-level) Latin and CJK text freetype alone is enough.
> You'll need to implement your own glyph cache for reasonable
> performance, but one can do this just by saving each
> font+glyphid+size+subpixel offset result to a texture subimage and
> caching the texture coords to use in drawing with it.
>
>>  What IS the absolute minimum set of dependencies possible?
>>  I would assume that's what we want, since we want nothing
>>  but memory images (no PNG, no PDF, no SVG, no DirectX,
>>  no xlib-pixmaps, no nothing (perhaps DIB is "memory"???).
>
> If you want vector support, then you do need cairo, pixman and
> freetype. Disabling everything but the image back end will help with
> the footprint.
>
> HTH,
>  -r
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