automating

Make 4 bash shell scripts under roms\scriptsshader-none.shshader-scanlines_horizontal.shshader-scanlines_vertical.shshader-upscale.sh
each script simply copies and overwrites the global.glslp file in /opt/retropie/configs/all/retroarch/shadersHere is shader-upscale.sh

shader-upscale.sh

#!/bin/bashcd /opt/retropie/configs/all/retroarch/configif ! test -f "global.glslp"; then echo "file exist does not exist adding" echo "#reference \"../shaders/global.glslp\"" > global.glslpficd /opt/retropie/configs/all/retroarch/shaderscp -f xbr-lv1-noblend.glslp global.glslp

shader-none.sh

#!/bin/bashcd /opt/retropie/configs/all/retroarch/configif test -f "global.glslp"; then echo "file exists, removing" rm global.glslpfi

RGUI save as global preset. This can also create the file/opt/retropie/configs/all/retroarch/config/global.glslp with the following contents#reference "../shaders/global.glslp"
But our bash scripts do this automatically now since that way I remove the shaders is to delete this file.

Now every retroarch launch look at out our new global.glslp.

Arcade 1up volume control switch. Watch Shaders On Testing, etc.

Deleting the global ref probably won't do anyting immiedalty. We would proably have to wipe contents of the real global.glslp

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