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video: wayland: Display non-native fullscreen aspect ratios centered with a black border #5534

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video: wayland: Display non-native fullscreen aspect ratios centered with a black border #5534

wants to merge 1 commit into from

Commits on May 14, 2022

  1. video: wayland: Display non-native fullscreen aspect ratios centered … 

    …with a black border

Employ subsurfaces and viewports to maintain a proper aspect ratio for fullscreen modes that don't match the display's native aspect ratio, and display the content centered, with a black border.  The mask surface uses a 1x1 SHM buffer, which is scaled to the display output dimensions using a viewport.  The draw surface becomes a subsurface of the parent surface and runs in desynced mode.

The hints SDL_WAYLAND_MODE_EMULATION and SDL_WAYLAND_SCALING are provided to disable non-desktop fullscreen resolutions and disable any output scaling/masking respectively when set to 0.
    @Kontrabant
    Kontrabant committed May 14, 2022
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