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This test renders various primitives with anti-aliasing both on and
off. It then repeats the render at several non-integer offsets.
Note: The reference image was generated with the raster engine,
which seems to have off-by-one errors on fills when rendering
aliased (It seems to ceil the coords rather than round them).
Reviewed-By: Trustme
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Conflicts:
src/corelib/tools/qsharedpointer.cpp
src/corelib/tools/qsharedpointer_impl.h
src/gui/dialogs/qcolordialog.cpp
src/gui/painting/qwindowsurface_raster.cpp
src/network/access/qnetworkaccessmanager.cpp
tests/auto/qsharedpointer/externaltests.cpp
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In qt_scale_image_16bit() and qt_scale_image_32bit(), when a sample
point was located on the border between two pixels in the source image,
the sample point was rounded up instead of down. If a sample point was
exactly on the bottom or right edge of the source image, the function
would therefore sample a pixel outside the image. Because of how the
target rectangle is rounded, a sample point will never be exactly on
the top or left edge of the source image, so we will not get a similar
problem there.
I extended the lance test pixmap_scaling.qps.
Task-number: 258533
Reviewed-by: Samuel
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The documentation is a bit ambiguous on what the expected behavior here
is, but the behavior was consistent across paint engines before 4.5.
QPaintEngineEx introduced inconsistencies in the raster and OpenGL paint
engines, so this patch reverts the behavior back to what it was in 4.4.
Task-number: 256549
Reviewed-by: Trond
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The fix for 1x1 source rect image drawing in change
ffbb3c1a2aee4134dce80cd144a26bf32865b698 was incorrect for transforms
with type >= TxScale. The aliased coordinate delta needs to be applied
in device coordinates, not in logical coordinates.
Also specialize the non-antialiased TxScale case by simply calling
fillRect_normalized directly, avoiding having to scan convert the
rectangle manually.
Task-number: 251561
Reviewed-by: Trond
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Don't use aliased coordinate delta for image drawing.
Related to change fde7475bcf9c10522a8170e6eb8fb9a8fadc21cd.
Task-number: 251561
Reviewed-by: Trond
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Images coordinates should simply be rounded and are not to be subject
to the aliased coordinate delta. The patch also adds a tiny delta in
QSpanData::setupMatrix() to ensure coordinates for fetching from source
images are rounded the opposite direction of the target rectangle.
This removes a lot of artifacts when trying to do border-image based
drawing on non-integer coordinates. A new qps test for border-image
drawing is included.
Task-number: 251561
Reviewed-by: Trond
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When drawing ellipse without stroke we need to use the same width/height
for the fill as we would use for the stroke for the stroke and fill to
match. Filling first and then stroking should produce the same result as
filling and stroking in one go.
Task-number: 249490
Reviewed-by: Trond
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