Script to open magic the gathering arena on MacOS with correct resolution.

mtga_open.sh

#!/bin/bash

help()
{
   # Display Help
   echo "Launches MTGA with Epic's command line options and fills in screen
   resolution"
   echo
   echo "Syntax: mtga_open.sh [h|r]"
   echo "options:"
   echo "h     Print this Help."
   echo "r     Launch using the real system resolution, not the apparent UI resolution"
   echo
}

while getopts ":hr" option; do
   case $option in
      h) # display Help
         help
         exit;;
      r) resolution="real" ;;
   esac
done


# system_profiler SPDisplaysDataType 
# there are two lines shown in the config generated from the above command;
# the 'real' resolution and the apparent UI resolution. 
# output looks something like:
# Graphics/Displays:
# 
#     Apple M1:
# 
#       Chipset Model: Apple M1
#       Type: GPU
#       Bus: Built-In
#       Total Number of Cores: 8
#       Vendor: Apple (0x106b)
#       Metal Family: Supported, Metal GPUFamily Apple 7
#       Displays:
#         Color LCD:
#           Resolution: 3360 x 2100
#           UI Looks like: 1680 x 1050 @ 60.00Hz
#           Main Display: Yes
#           Mirror: Off
#           Online: Yes
#           Automatically Adjust Brightness: No
#           Connection Type: Internal


if [[ "$resolution" = "real" ]]; then
  res_line=$(system_profiler SPDisplaysDataType | grep 'Resolution')
else
  res_line=$(system_profiler SPDisplaysDataType | grep 'UI')
fi

# this parses the resolution from the above line
if [[ "$res_line" =~ :[[:space:]]([0-9]{4})[[:space:]]x[[:space:]]([0-9]{4}) ]]; then
  width=${BASH_REMATCH[1]}
  height=${BASH_REMATCH[2]}
else
  echo "no match found"
  width=2560
  height=1440
fi

echo "using resolution: $width x $height"

MTGA_APP='/Users/Shared/Epic\ Games/MagicTheGathering/MTGA.app/Contents/MacOS/MTGA'
ARGS=('-force-metal' '-force-low-power-device' '-screen-fullscreen 1' "-screen-width $width" "-screen-height $height")
MTGA_CMD="$MTGA_APP ${ARGS[*]}"
echo "running $MTGA_CMD"
eval "$MTGA_CMD"
exit 0