app_server: make FontFamily referenceable

FontStyle will be keeping the references, so the family will exist as
long as there's a style pointing to it.

Change-Id: I639f7914be924a84d5db5882c638a4dac665aa23
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7634
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

app_server: keep pinned fonts accessible by ID after removal

On font removal styles may still be referenced by views, pictures or
whatever else. In that case, what we were doing had the following
effects:
- The style is still available through the family. So it is still
returned when listing fonts.
- The style is not available by ID. So a few app server messages will
fail, including those for string width or character escapements.
Moreover, if the removal was due to an update, adding the style again
fails because we already have one by that name. If all the old
references are finally dropped, we end up without the old nor the
updated style.

We now do the opposite: until all references are dropped, a style can
still be fetched by ID (that is, by an object that loaded it before
being removed), but it is not listed anymore (so it won't be given to an
app loading a font by name or by changing the style of a font of the
same family).

Fixes: #18868
Change-Id: Ia64744afeb9297fd446e437d08636733b6dc0aec
Reviewed-on: https://review.haiku-os.org/c/haiku/+/7633
Reviewed-by: Fredrik Holmqvist <fredrik.holmqvist@gmail.com>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Haiku-Format: Haiku-format Bot <no-reply+haikuformatbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

app_server: push FontManager knowledge to FontStyle creation

Change-Id: I98a68a894642147d398faf22591a22afef4c3ba2
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6060
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

BFont: allow loading of user fonts from disk or memory

This patch adds an API call to BFont, called LoadFont, that
takes a string path to a font file. The user fonts are managed
via a new class called AppFontManager that inherits from the base
class FontManagerBase but adds the methods to add and remove user
fonts from disk or memory. There is also a new method called UnloadFont
to remove a user font, but on exit of an app all user fonts should be
automatically cleaned up.

Global/system fonts are managed by the GlobalFontManager, which is
a new class that also inherits from the base class FontManagerBase,
replacing the old "FontManager" class.

A maximum of 128 user fonts may be loaded, and memory fonts
may not exceed 20MB.

There's also an overloaded version of LoadFont that accepts
an area_id and loads the font from memory. A size and offset may
optionally be provided to allow for an area that contains more
than just a font.

Change-Id: I6add42bdf0c0cefc0e2e2a4984fd848c3e7269e5
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4790
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

Cleanup app server directory a bit by creating a font and a decorator sub folder.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42483 a95241bf-73f2-0310-859d-f6bbb57e9c96

Cleanup app server directory a bit by creating a font and a decorator sub folder.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42483 a95241bf-73f2-0310-859d-f6bbb57e9c96