Such lines are rendered by drawing a capless line that is pen-width
long, i.e. a square, to represent the two line caps. However, the line
length offset was added before any transformation, so one could end up
with a long line being rendered if the world transform had a large
scale, say.
Change-Id: Idff8a2de54c97e35facc8f4e09c43dfea7397588
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
(cherry picked from commit 56de11397559af3b9694ef2b99d93a469889ae5e)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
(cherry picked from commit 8159f4626bb1c1a267f464464cd757638fda7110)
When using the cosmetic stroker (i.e. plain pens with effective line
width of 1), drawing points with fractional coordinates >= 0.5 would
fill the wrong pixel.
This is a long-standing bug where the drawPoints() code in the
cosmetic stroker code was missed during the painting coordinate system
shift for Qt 5.0. Prior to that, coordinates were interpreted as the
upper left corner of a pixel, so rounding fractional coordinates to
the closest integer would be the correct way to determine the pixel to
be filled. From Qt 5 onwards however, coordinates instead designate
the center point of the primitive to be stroked. In order to determine
which pixel is most covered by the unit square centered in the given
coordinates, fractional coordinates must be rounded downwards
(floored).
This fix makes the behavior consistent between the cosmetic and
non-cosmetic stroker, so that drawPoints() with e.g. penwidths 1 and
1.01 in practice fills the same pixels.
Pick-to: 6.6
Fixes: QTBUG-119306
Change-Id: I39cb7ad55229553dda098e6fbc9ee449b1fd9664
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
Variant-selectors are special unicode symbols which are used to
modify glyph selection for the preceding character. For instance,
a regular symbol could be turned into a color emoji using VS16,
the emoji variation selector. In order for this to work, however,
the font that handles the selector has to handle the full pair of
characters, so that it can apply the correct substitution rules.
One specific example of this was on macOS, where an airplane
symbol + VS16 would match the symbol to the default UI font but
the VS16 to the emoji font. Since there string provided for the
emoji font did not have any preceding character for VS16, we just
ignored it.
To improve on this, we now detect variation selectors that have
been matched to different font engines than the preceding
character. When such a case occurs, we check if the selector font
also supports the preceding character, and if it does, we keep
the pair together and use the same font for both.
[ChangeLog][QtGui][Text] Fix some cases where a variation-selector
character would be ignored in font selection and the correct
variant of a character would thus not be selected.
Task-number: QTBUG-108799
Change-Id: I9f427e0520e652ee2f24a4f7dc3c1957251e06bd
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
This implements the recent functionality extension of painting
cosmetic (untransformed) brush patterns, and the corresponding
NonCosmeticBrushPatterns render hint, in the pdf and opengl paint
engines.
As part of the implementation it also fixes a couple of pre-existing
bugs in the opengl engine, relating to updating the brush after
changes in transformation or brush origin.
As a driveby, it also includes a minor fix for the lance testing tool:
request stencil buffer, as that is needed and not always provided by
default. This echoes a recent fix done to tst_baseline_painting.
Change-Id: Ia8811477e015eebeb40ed138bca96643ce1ab0dc
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
[ChangeLog][QtGui][QPainter] In Qt 5, the predefined brush patterns
would always be transformed along with the object being painted. In Qt
6.0 onwards, they would or would not, depending on the
SmoothPixmapTransformation render hint. Instead of this somewhat
surprising behavior, make the default be untransformed
(i.e. cosmetic), which makes sense when it comes to dpr scaling. For
the cases where one wants scaling, a new render hint is introduced to
enable that: NonCosmeticPatternBrushes.
Change-Id: I2208c7a28af9056d7ab97a529b66bf2d502c3c4f
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
In a recent improvement (6de36918c0) the
last set clip region or path was stored in separate variables, in
order to be set again if the aliasing mode changed. That solution was
too simplistic, as it would break down as soon as more than one clip
area was set, with the latter either replacing or intersecting the
first. It was also unnecessary to introduce new storing of clip areas
and transforms, as those are already recorded in the clipInfo stack in
the painter state. This patch hence reverts much of that implementation.
However the basic idea of setting the clip area again after AA change
is good, so that part is kept, implementated instead by calling a
pre-existing function to replay the clipInfo stack.
One of the baseline test cases is extended to excercise the
combination of clip areas. As a driveby, support for setClipRectF is
added to the painting baseline test scripts, and the build of the
manual lance tool is fixed.
Fixes: QTBUG-101474
Pick-to: 6.3 6.2
Change-Id: Ide8b70d8cbf138deb06cbb84f69e62f7405886e6
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
In preparation for addition of new baseline tests, establish a new
test category, "baseline". This is similar to the category
"benchmarks" in that it contains tests that use the QTest framework,
but conceptually are not unit tests, in contrast to those under auto/.
Move the existing QPainter baseline test, tst_lancelot, into this new
category, and rename it accordingly.
Baseline tests use the QBaselineTest extension to QTest. Move that
extension too into the tests/baseline directory, allowing the clean
out of the baselineserver directory.
Pick-to: 6.2
Change-Id: I1b527f5867c953b1d22be73798fcf7d1494712ea
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Eirik Aavitsland <eirik.aavitsland@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Eirik Aavitsland
Laszlo Agocs
Eskil Abrahamsen Blomfeldt