Icon-O-Matic: Add perspective transformations

As part of adding perspective transformations, agg_trans_perspective.h
was patched to fix a multiple definitions error. This change has been
submitted for review to the "upstream" repositories at [1], [2],
and [3].

Also includes various other improvements such as VertexSource being
split into its own file, code style improvements, and documentation
improvements.

[1] https://sourceforge.net/p/agg/patches/6/
[2] https://github.com/ghaerr/agg-2.6/pull/9
[3] https://github.com/aggeom/agg-2.6/pull/7

Change-Id: I4bffd2f87354bde10155e23145a232a925be6ff3
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6801
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

Icon-O-Matic: Add reference images

Fixes #2748

Also fixes a comment misstating a function's name and code style.

Change-Id: I609a1f1e100ded647818e70b428cedc48cf29036
Reviewed-on: https://review.haiku-os.org/c/haiku/+/6604
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Adrien Destugues <pulkomandy@pulkomandy.tk>

More catalog-related cleanup.

* rename B_TRANSLATE_CONTEXT to B_TRANSLATION_CONTEXT and
B_TRANSLATE_WITH_CONTEXT to B_TRANSLATE_CONTEXT, squashing a TODO
* adjust all uses of both macros in Haiku's source tree
* use correct header guard for collecting/Catalog.h

The renamed macros require adjustments to all external applications
using catalogs.

Made some more strings localizable, removed some unnecessary localizations from CDPlayer. I hope everything's OK...

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40436 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Merged weak-symbols branch.
* Fixed trivial merge conflict in src/system/libroot/posix/locale/nl_langinfo.cpp
* Fixed gcc 2 compilation of src/system/glue/init_term_dyn.c.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39571 a95241bf-73f2-0310-859d-f6bbb57e9c96

Enable just enough of the message based format used in Icon-O-Matic to allow
BIconUtils to understand and render it. This makes it possible to use the
HVIFTranslator to also read Icon-O-Matic files out of the box. Will cleanup
now duplicated files next.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30794 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Put the remaining libicon.a classes into the BPrivate::Icon namespace.
* Minor cleanup (like removing the extra blank line between the copyright and the
header guard).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20507 a95241bf-73f2-0310-859d-f6bbb57e9c96

* moved all the classes actually needed for reading a
vector icon to this place, #ifdef'd out all the editing
features (listening, referencing, converting to
PropertyObject... etc)
* TODO: put into BPrivate namespace...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18396 a95241bf-73f2-0310-859d-f6bbb57e9c96

More catalog-related cleanup.

* rename B_TRANSLATE_CONTEXT to B_TRANSLATION_CONTEXT and
B_TRANSLATE_WITH_CONTEXT to B_TRANSLATE_CONTEXT, squashing a TODO
* adjust all uses of both macros in Haiku's source tree
* use correct header guard for collecting/Catalog.h

The renamed macros require adjustments to all external applications
using catalogs.

Made some more strings localizable, removed some unnecessary localizations from CDPlayer. I hope everything's OK...

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40436 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Merged weak-symbols branch.
* Fixed trivial merge conflict in src/system/libroot/posix/locale/nl_langinfo.cpp
* Fixed gcc 2 compilation of src/system/glue/init_term_dyn.c.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39571 a95241bf-73f2-0310-859d-f6bbb57e9c96

Enable just enough of the message based format used in Icon-O-Matic to allow
BIconUtils to understand and render it. This makes it possible to use the
HVIFTranslator to also read Icon-O-Matic files out of the box. Will cleanup
now duplicated files next.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30794 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Put the remaining libicon.a classes into the BPrivate::Icon namespace.
* Minor cleanup (like removing the extra blank line between the copyright and the
header guard).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20507 a95241bf-73f2-0310-859d-f6bbb57e9c96

* moved all the classes actually needed for reading a
vector icon to this place, #ifdef'd out all the editing
features (listening, referencing, converting to
PropertyObject... etc)
* TODO: put into BPrivate namespace...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@18396 a95241bf-73f2-0310-859d-f6bbb57e9c96