• Oliver Sander's avatar
    Mind the devicePixelRatio when drawing on-screen in presentation mode · 19f22098
    Oliver Sander authored
    Previously, when using a screen scaling factor larger than 1, the
    drawings by mouse or stylus in presentation mode were slightly blocky.
    The underlying cause was
    a) a few integer types used for non-integer coordinates
    b) the intermediate use of a QPixmap without the correct
    Additionally, this patch uses a QPainterPath to draw the path,
    rather than a sequence of individual lines.  This improves
    the line quality a tiny bit, because the lines are properly
    BUG: 384143
    Differential Revision: https://phabricator.kde.org/D21836