This implements the Loop/Blinn algorithm for quadratic curves
as an optional backend for Qt Quick Shapes, basically distance
fields where the distance to curves are calculated in the
fragment shader.
This means cubic curves are approximated, which will give
varying results, but for many shapes (such as text) this is
efficient and means the shapes can be zoomed indefinitely
while still retaining curvature as well as anti-aliasing
working without MSAA.
Preliminary results give some frame rate improvements
compared to doing MSAA and GeometryRenderer, but the major
improvement is that you can get smooth curves at any zoom
level without re-triangulating the shape.
Note that the renderer currently does not do antialiasing
for straight lines. This would still require MSAA, but at
a lower cost than for GeometryRenderer since there are
much fewer triangles. Adding AA here as well is work in
progress.
Task-number: QTBUG-104122
Done-with: Paul Olav Tvete <paul.tvete@qt.io>
Done-with: Eirik Aavitsland <eirik.aavitsland@qt.io>
Done-with: Amr Elsayed <amr.elsayed@qt.io>
Change-Id: I6b4a1103546fbdfe760906f7a183101f8eedb9d3
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
Replace the current license disclaimer in files by
a SPDX-License-Identifier.
Files that have to be modified by hand are modified.
License files are organized under LICENSES directory.
Pick-to: 6.4
Task-number: QTBUG-67283
Change-Id: I63563bbeb6f60f89d2c99660400dca7fab78a294
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
For text rendering in Qt Quick, we currently have the limitation
that when rendering text at such a large size that the distance
fields start showing artifacts, the only option is to use
NativeRendering, which will look nice, but which will use a lot
of texture memory for the glyph cache, since it will actually
cache the glyphs at the requested size.
A suggested approach would be to fall back to using triangulated
paths when the font gets large enough, but the work on this was
never completed.
It turns out that we can get this now, basically for free, since
we already support rendering arbitrary QPainterPaths using
Qt Quick Shapes. The only thing missing is the ability to add
the path of a given text to the shape. This patch fills in that
gap.
Note that this is currently not supported by nvidia renderer.
[ChangeLog][QtQuick] Added PathText path element which can be
used together with Qt Quick Shapes to get text rendering that
does not cache glyphs in a texture, but triangulates the
outlines of the glyphs instead.
Change-Id: I436e1476b129b324cf7a54f89a1b18e0579e8185
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
With this property, Paths and ShapePaths become scalable.
[ChangeLog][QQuick][Path] Added scale property to scale
a path before sending it in to PathView/Shape.
Change-Id: Id9ce7d1247d55e2cdb0d27a19c86fe0970e66268
Fixes: QTBUG-74456
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Improve performance of QML ShapePath, especially with more complex
animating paths. Testing revealed that considerable amount of time
is used for calculating QPainterPath::length(). QML ShapePath
doesn't support QQuickPathAttribute or QQuickPathPercent, so it
can have a fast-path for creating the path without calculating
length or attributes.
This gave heavy bezier lines rendering test ~7x performance boost.
Task-number: QTBUG-64951
Change-Id: I5240ed3516b5eafb0391790ac96835e70f88e540
Reviewed-by: Robin Burchell <robin.burchell@crimson.no>
Reviewed-by: Michael Brasser <michael.brasser@live.com>
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
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: Ic36f1a0a1436fe6ac6eeca8c2375a79857e9cb12
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>
Qt copyrights are now in The Qt Company, so we could update the source
code headers accordingly. In the same go we should also fix the links to
point to qt.io.
Change-Id: I61120571787870c0ed17066afb31779b1e6e30e9
Reviewed-by: Iikka Eklund <iikka.eklund@theqtcompany.com>
It is a prequel for the refactoring of the pathElements property.
Change-Id: I56cc4b9b419fecf96e331a6cab58b33157742e70
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>
Reviewed-by: Aurindam Jana <aurindam.jana@digia.com>
Reviewed-by: Alan Alpert <aalpert@blackberry.com>
Change copyrights and license headers from Nokia to Digia
Change-Id: Ie7f5d49ed8235d7a7845ab68f99ad1c220e64d5c
Reviewed-by: Lars Knoll <lars.knoll@digia.com>
Symbols beginning with QDeclarative are already exported
by the quick1 module.
Users can apply the bin/rename-qtdeclarative-symbols.sh
script to modify client code using the previous names of the
renamed symbols.
Task-number: QTBUG-23737
Change-Id: Ifaa482663767634931e8711a8e9bf6e404859e66
Reviewed-by: Martin Jones <martin.jones@nokia.com>
Eskil Abrahamsen Blomfeldt
Lucie Gérard
Paolo Angelelli
Shawn Rutledge
Kaj Grönholm
Laszlo Agocs
Lars Knoll
Jani Heikkinen
Jani Heikkinen
Gunnar Sletta
Marco Bubke
Sergio Ahumada
Iikka Eklund
Matthew Vogt