run stretch's layout on physical coordinates to fix pixel alignment #1061
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Moxinilian
added
C-Bug
cart
reviewed
Dec 15, 2020
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There is one artifact you can see when running a 2x scale factor. Run the UI example and watch the two elements anchored to the top edge while resizing the window from the bottom edge. They vibrate vertically due to the fractional part of logical size spinning through different values. For 2x, it would toggle between .0 and .5 which causes the items to move up and down by one pixel. |
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Ooh yeah thats definitely noticeable. And this pr definitely fixes it. Nice work! |
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Currently, the values passed to stretch's algorithm are in logical coordinates. Due to internal rounding in stretch's algorithm, the results don't align to the pixel grid on high DPI monitors with non-integer scaling factors. This patch converts those values to physical coordinates prior to invoking the stretch and converts the results back to logical coordinates so that stretch rounds coordinates to the nearest physical pixel.