Previously, the test succeeded for MinGW 64 5.3, which is still missing
IDWriteFontFace2. Amends change 33044b83c2.
Task-number: QTBUG-52952
Change-Id: I959f604d6bb9aa0efc765f2e26ec58d852ab92de
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
Detect if DirectWrite 2 is available, and support color fonts if possible.
One limitation worth mentioning is that if the color font contains regular,
monochrome glyphs as well, then these will be drawn in black, and not in the
pen color. Fixing this would require some elaborate rewrites in the font
rendering system, since we would have to have two font caches per
color font (one for mono and one for colors), or do some sort of trick where
we make argb(r, g, b, 0) mean subpixel alpha instead, and detect glyphs that
are not correctly premultiplied when blitting to the screen.
Another limitation is that the approach does not work with distance field
rendering. In principle we could support this on Windows, since the
format is vector based, but it would also require substantial work and
it is not possible to support for Apple/Google fonts anyway, so it would
just lead to code which is not cross-platform.
[ChangeLog][Windows] Added support for color fonts (color emojis) when
DirectWrite 2 is available.
Change-Id: I6a608dd5d2aa3a7e762a06830902bddac7c550a5
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
From Qt 5.7 -> LGPL v2.1 isn't an option anymore, see
http://blog.qt.io/blog/2016/01/13/new-agreement-with-the-kde-free-qt-foundation/
Updated license headers to use new LGPL header instead of LGPL21 one
(in those files which will be under LGPL v3)
Change-Id: I046ec3e47b1876cd7b4b0353a576b352e3a946d9
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
This will automatically add DirectWrite support if the required
headers are found. The note about platform support from the help
screen has also been removed, since Windows XP is not officially
supported. Applications that need to run on XP can still build
with -no-directwrite.
Also changed the configure test to be a proper compile test, since
cross-compiled builds for Windows CE may break otherwise.
Change-Id: I7fc7bfb25f2f86ced8a4d4c78a69527de0273707
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@theqtcompany.com>
Reviewed-by: Konstantin Ritt <ritt.ks@gmail.com>
