app_server: refactor font managers

Move common add/remove code to the base class and improve encapsulation.
Loading FreeType is the responsibility of the global font manager.
Rename FontManagerBase back to FontManager.

Change-Id: I9396112f01583e19d03011106fd1fa1e37958ee8
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6072
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

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>

app_server: add B_UNDERSCORE_FACE support

There was some confusion (and a TODO indicating it) in ServerFont.cpp,
because the notion of "font face" from the Be API is partially
implemented using different font manager styles (bold, italic, etc),
and partially by keeping flags in a separate variable for drawing
extra things or modifying the drawing (underscore, strikeout, ...).

The implementation did not actually preserve the extra flags, and so the
underscore face attribute was lost.

Implement the actual underlining of the text in AGGTextRenderer. This
implementation is a naive one so far. In particular there are the
following limitations:
1. Line is drawn over the text - no nice gaps for descents. Ideally, the
line should not touch the letter descents, and leave some space
around them. I don't know how to retrieve the contour - it appears to
me this might require bigger refactoring of this code. I have left in
my experiments commented out in the code.
2. If the text run ends with whitespace, the whitespace is not underlined
as it should. In particular if another text run is drawn next to it
and it's expected that the underline is continuous between the two.

Change-Id: I8d78b8e1eceddff0a7d98e5a49659e7b03fd89a0
Reviewed-on: https://review.haiku-os.org/c/haiku/+/3041
Reviewed-by: Kacper Kasper <kacperkasper@gmail.com>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

Get font metrics from a bitmap if there are no outlines

FreeType only provides some font parameters for scalable fonts. In
particular, we use the FT_Face values of units_per_EM, ascender,
descender and height, which are 0 for bitmap-only fonts.

Part of #16938.

Change-Id: Iea2d87ad95f3bc1c2e27fb041da0a27c6e68be91
Reviewed-on: https://review.haiku-os.org/c/haiku/+/4042
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>

app_server: Drop custom HashTable and use HashMap instead.

Change-Id: I7d5aae6a7fd2b4f47704a931a23eee09a4eedcac
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2323
Reviewed-by: John Scipione <jscipione@gmail.com>

Server side support for BFont::IsFullAndHalfFixed().

Check a range of characters to see if they have the same width.

Change-Id: I9cef12f78d1e1d01acc6284eae90dbfb86166fc6
Reviewed-on: https://review.haiku-os.org/47
Reviewed-by: Adrien Destugues <pulkomandy@gmail.com>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

"thin" fonts are B_LIGHT_FACE

In Noto fonts, "thin" is another level of "light" apparently
(somewhere in between "extralight" and "medium"... lots of choice these days).

Tell app_server about it so the proper font flags can be set. This may
help avoid confusion, as Terminal (and FontDemo, in less predictable
ways) tend to pick the "thin" variant of fonts even when "regular" is
requested.

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