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Visible at e.g. in Calc: Format Cells/Borders/Line Styles.
The problem was that first commit
2e99e4e11d33679aed674eea0d6054d16d39d6df (opengl: use MVP matrix in
vertex shaders, pixel offsets, 2015-07-08) introduced the concept of
pixel offsets, setting the value (implicitly) to 0 in
OpenGLSalGraphicsImpl::DrawTrapezoid(), but using 0.5 in
OpenGLSalGraphicsImpl::FlushLinesOrTriangles().
This is fine, but then later commit
2003076c4318511a3d621558d3b44b4e8e6c6529 (opengl: batch draw
polypolygons, 2016-05-29) changed
OpenGLSalGraphicsImpl::drawPolyPolygon() to use deferred drawing instead
of DrawTrapezoid(), without doing any translation of the input
polypolygon. This resulted in loss of those polygons when used in the
above mentioned dialog, which has a listbox of bitmaps, where each line
style preview is drawn on a virtual device with a height of 1px. So at
the end the 1px offset meant the previews were simply missing.
('make CppunitTest_vcl_gen SAL_USE_VCLPLUGIN=gen SAL_FORCEGL=1' is
needed on Linux to see the test failing without the fix.)
Change-Id: Ia9f3d6e7cb38a43fe2f8a41746b538af68add43c
Reviewed-on: https://gerrit.libreoffice.org/69920
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins
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This fixes the black rectangle instead of actual image content in the
bugdoc.
An alternative would be to handle this in the PNG import, but commit
66dbd4da3afcadb1393daf9be9cecff71b86509a (tdf#113918: Workaround: Load
1bpp indexed PNG as 8bpp indexed Bitmap, 2017-11-20) already tried
something similar and failed, leading to the revert in commit
25cd843664919974f0d21ca7a0b02cc43e9eeabb (tdf#115297: alternative fix
for displaying 1bit images, 2018-02-27).
The test is especially useful with SAL_FORCEGL=1 SAL_USE_VCLPLUGIN=gen
specified on Linux, so the GL codepath is triggered.
Change-Id: Ia9d049d09dce2ac34826ee427f74616a96a35c88
Reviewed-on: https://gerrit.libreoffice.org/68925
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Tested-by: Jenkins
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