@echo off

Title convert_oldgrub_grub4dos_rev2.bat

REM updated 10/22/2014

REM Place this batch file anywhere and drag and drop the image files (bmp, 
REM jpg or png) to be converted on it (other image formats may not convert 
REM correctly). Converted files will be moved to the same directory as this file. 

REM Drag and drop single or multiple 640x480 (or with the same aspect ratio) 
REM .png or .bmp images into this batch file to convert them to Grub and 
REM Grub4Dos compatible splash images with ImageMagick. The converted 
REM file(s) will have "_splash" appended after the name and the 
REM extension(s) changed to xpm.gz. This script works for files only (it will 
REM not work for folders). Tested on Vista and WinXP with ImageMagick portable 
REM installed to C:\Utilities folder.

REM CD "%~dp0" changes the working directory to the current directory (where 
REM this batch file is located)
REM "%~n1" is the file name minus the extension

CD "%~dp0"
set cdir=%~dp0%

echo.
echo Current directory is: "%~dp0"
echo.

:Loop
IF [%1]==[] goto continue
F:\Utilities\ImageMagick\convert -resize 640x480 -colors 14 %1 ^
"%~n1_splash.xpm.gz"
move "%~n1_splash.xpm.gz" "%cdir%"
echo "%~nx1 converted to xpm.gz"
echo "converted image moved to:"
echo "%cdir%"
echo.
SHIFT
goto Loop
:continue

echo.
echo "All conversions completed...."
echo.

@pause

REM --------------------------- exit -----------------------------------------
:end
EXIT /B 0