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Chun-wei Fan authored
This enables HiDPI support for GTK+ on Windows, so that the fonts and window look better on HiDPI displays. Notes for the current work: -The DPI awareness enabling can be disabled if and only if an application manifest is not embedded in the app to enable DPI awareness AND a user compatibility setting is not set to limit DPI awareness for the app, via the envvar GDK_WIN32_DISABLE_HIDPI. The app manifest/user setting for DPI awareness will always win against the envvar, and so the HiDPI items will be always setup in such scenarios, unless DPI awareness is disabled. -Both automatic detection for the scaling factor and setting the scale factor using the GDK_SCALE envvar are supported, where the envvar takes precedence, which will therefore disable automatic scaling when resolution changes. -We now default to a per-system DPI awareness model, which means that we do not handle WM_DPICHANGED, unless one sets the GDK_WIN32_PER_MONITOR_HIDPI envvar, w...
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