For perspective transforms, we need to find the sample
range in the glyph cache per pixel. We can do this by
getting the gradient of the distance field at the
specific pixel.
This will ensure proper antialiasing with any
projection, but has the limitation that when glyph contours
become thinner than a pixel, they may disappear or become
too emphasized, because the hardware-gradient - based on
neighbouring fragments - is not reliable at that scale.
So we should only default to this when we detect that the
text is child of a 3D scene.
To make this smooth, we need to know the mode of the renderer
when creating the shader. So QSGMaterial::createShader()
now takes a render mode that we can use to customize behavior
based on whether it is rendering into a 2D or 3D scene.
[ChangeLog][QtQuick] The QSGMaterial::createShader() virtual
function has been extended to take a render mode argument,
which can be used for any customizations needed in the case
where the shader will be used in combination with 3D perspective
transformations.
Fixes: QTBUG-84695
Change-Id: I5a18a4edbdfa07e8f9d506c42bb20e8eb580927d
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
After a symbiotic relationship in Qt 5.14 and 5.15, it is time for
QSGMaterialRhiShader to devour its older sibling and take its place.
This makes the direct OpenGL rendering path disfunctional. All
QSGMaterial Qt 6 TODOs are solved, the API is clean and straightforward
again: a QSGMaterial creates a QSGMaterialShader, no special flags and
options needed. (it's just that QSGMaterialShader now has a slightly
different API)
Task-number: QTBUG-79268
Task-number: QTBUG-82997
Change-Id: I545ca8d796c5535e81957c706e7832133be15b7d
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
And port the graph example to QSGMaterial and the RHI. We will not anymore add a
direct OpenGL path (that would mean using QSGMaterialShader) for the example because
the upcoming purge renders that useless anyway.
Task-number: QTBUG-82988
Change-Id: I137575ed5df45b6bfc34a11d73dc5100945081c5
Reviewed-by: Andy Nichols <andy.nichols@qt.io>
Coverity (CIDs 161677, 161674) caught us setting a bad example in our
example code.
Change-Id: I395f689586f9a6ad783328b9258096cbc9ccd692
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
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>
Laszlo Agocs
Eskil Abrahamsen Blomfeldt
Shawn Rutledge
Kai Koehne
Edward Welbourne
Jani Heikkinen
hjk
Gunnar Sletta