runcommand-onstart.sh

#!/usr/bin/env bash
#title           :  runcommand-onstart.sh
#description     :  This script perform the following
#                   Determines if the game being run is a console or an arcade/fba
#                   For arcades, it will programatically determine the resolution based on resolution.ini file
#                   For consoles, hdmi_timings can be set based on emulator or system
#                   Dynamically creates the game_name.zip.cfg file and sets the custom_viewport_height
#                   Dynamically add these parameters (video_allow_rotate = "true" and video_rotation = 1) for vertical games
#                       vertical.txt contains all the mame 0.184 vertical games
#                   Ability to set custom_viewport_width for arcades/fba
#                   Fix arcade custom_viewport_width for 320x224 and 320x240 resolutions
#                   Added amiga and C64 support
#                   Automatically set custom_viewport_y to center vertically (Removed on 0.7.1)
#                   Added support for 480 height arcade games like tapper
#                   All console and arcade will default to 1600x240 resolution
#                   Disable resolution change for non libretto cores
#                   Added support for 448 height arcade games like popeye
#                   Added support for 254 height arcade games like mk3
#                   Arcade/FBA - Set custom_viewport_width to be rom_resolution_width multiplied closest to 1600
#                   Removed text output when running scripts
#                   Reverted hdmi_timings to previous version
#                   Removed all logging
#                   Default non supported emulators to 320x240
#author          :  Michael Vencio
#date            :  2019-05-25
#version         :  0.8.3
#notes           :  For advance users only and would need to be tweaked
#                   to cater to your needs and preference
#                   resolution.ini (0.184) file needed http://www.progettosnaps.net/renameset/
#===============================================================================================================


# get the system name
system=$1

# get the emulator name
emul=$2
emul_lr=${emul:0:2}

# get the full path filename of the ROM
rom_fp=$3
rom_bn=$3

# Game or Rom name
rom_bn="${rom_bn%.*}"
rom_bn="${rom_bn##*/}"

# Determine if arcade or fba then determine resolution, set hdmi_timings else goto console section
if [[ "$system" == "arcade" ]] || [[ "$system" == "fba" ]] || [[ "$system" == "mame-libretro" ]] ; then
    # get the line number matching the rom
    rom_ln=$(tac /opt/retropie/configs/all/resolution.ini | grep -w -n $rom_bn | cut -f1 -d":")

    # get resolution of rom
    rom_resolution=$(tac /opt/retropie/configs/all/resolution.ini | sed -n "$rom_ln,$ p" | grep -m 1 -F '[')
    rom_resolution=${rom_resolution#"["}
    rom_resolution=${rom_resolution//]}
    rom_resolution=$(echo $rom_resolution | sed -e 's/\r//g')
    rom_resolution_width=$(echo $rom_resolution | cut -f1 -d"x")
    rom_resolution_height=$(echo $rom_resolution | cut -f2 -d"x")
    # Set rom_resolution_height for 480p and 448p roms
    if [ $rom_resolution_height == "480" ]; then
        rom_resolution_height="240"
    elif [ $rom_resolution_height == "448" ]; then
        rom_resolution_height="224"
    fi

    # Create rom_name.cfg
    if ! [ -f "$rom_fp"".cfg" ]; then
        touch "$rom_fp"".cfg"
    fi

    # Set custom_viewport_height
    if ! grep -q "custom_viewport_height" "$rom_fp"".cfg"; then
        echo -e "custom_viewport_height = ""\"$rom_resolution_height\"" >> "$rom_fp"".cfg" 2>&1
    fi

    # determine if vertical
    if grep -w "$rom_bn" /opt/retropie/configs/all/vertical.txt ; then
        # Add vertical parameters (video_allow_rotate = "true")
        if ! grep -q "video_allow_rotate" "$rom_fp"".cfg"; then
            echo -e "video_allow_rotate = \"true\"" >> "$rom_fp"".cfg" 2>&1
        fi
        # Add vertical parameters (video_rotation = 1)
        if ! grep -q "video_rotation" "$rom_fp"".cfg"; then
            echo -e "video_rotation = \"1\"" >> "$rom_fp"".cfg" 2>&1
        fi
    fi

    # set the custom_viewport_width
    if ! grep -q "custom_viewport_width" "$rom_fp"".cfg"; then
        echo -e "custom_viewport_width = ""\"1600\"" >> "$rom_fp"".cfg"  2>&1
    fi
fi

# Use 1600 resolution for libretto cores
if [[ "$emul_lr" == "lr" ]]; then
    vcgencmd hdmi_timings 1600 1 85 157 192 240 1 4 3 15 0 0 0 60 0 32000000 1 > /dev/null
    tvservice -e "DMT 87" > /dev/null
    fbset -depth 8 && fbset -depth 16 -xres 1600 -yres 240 > /dev/null
else
    vcgencmd hdmi_timings 320 1 16 30 34 240 1 2 3 22 0 0 0 60 0 6400000 1  > /dev/null
    tvservice -e "DMT 87" > /dev/null
    fbset -depth 8 && fbset -depth 16 -xres 320 -yres 240 > /dev/null
fi