[mcclim-devel] Freetype for SBCL

[Christophe Rhodes]

Brian Mastenbrook <chandler at unmutual.info> writes:

> In order to use this under SBCL, you must use the .asd file, as
> there's a little ASDF muckery in there to work around the fact that
> compiling the freetype-ffi file currently stuffs up in SBCL. After the
> rest of the code finishes compiling, you should see a message about
> setting mcclim-freetype:*freetype-font-path* - set this to a directory
> containing the Bitstream Vera fonts, and don't forget the final / on
> the pathname or else merge-pathnames is not going to be happy.
>
> Comments and patches welcome, especially from CMUCL users.

Find attached a patch which makes it work on my amd64 (and stops it
from working on 32-bit platforms, of course).

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There seems to be something slightly wrong with text-style-width, as
demonstrated in the following screenshot:
  <http://www-jcsu.jesus.cam.ac.uk/~csr21/text-style-width.png>.

What's going on in this example is that the top line implements the
spaces by calling stream-increment-cursor-position with an
x-displacement of text-style-width; the second line simply draws the
text in one fell swoop.  Thus, a slightly smaller than true
text-style-width causes this displacement (and also for the cursor to
be drawn in the wrong position, if it's not at the start of the line).

Cheers,

Christophe