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doc/hook: Update documentation about gfx scaling

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icex2 2021-03-19 23:42:54 +01:00
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doc/hook/hook.md
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@ -261,3 +261,11 @@ If you have a multi-monitor setup, things are getting quite complicated. Therefo
Also note that if you want the game to render at a higher resolution than its defined one, e.g. 640x480, this is not
possible right now. The output you get from the frame buffer will always be its native resolution.
### The game window is small and the 4:3 games are stretched when full screen on modern widescreen displays
On supported games, you can change the option `gfx.scaling_mode` in the `hook.conf` file to enable different pre-defined
scaling modes. Especially for the SD 640x480 4:3 games, this allows you to upscale the rendered output to a widescreen
display resolution while keeping the aspect ratio (pillarbox).
Note: This does not change the enhance the image quality. It just uses the GPU to interpolate the lower resolution
output and stretches it to the target surface area.