Re: Ghetto Image Converter for HGR modes

[biafra.republic@gmail.com]

On Thursday, December 23, 2010 1:24:18 AM UTC-6, Osgeld wrote:
> I entered ludum dare last weekend, which is a 48 hour from scratch
> game development compo, and I decided I was going to make an Apple II
> "battleship" clone (since the theme was discovery) currently its 4
> days past deadline and I am still fighting with it lol
> 
> anyway a half hour before the competition started, I decided I needed
> a way to draw highres graphics and export them to the II, so I whipped
> up this little ghetto system to do just that
> 
> Requirements:
> PC running The Gimp
> PC with lua 5.1 installed (older versions of the lua interpreter will
> not work)
> The Gimp palette file I made for the Apple II HGR colors
> The Lua conversion script I made
> 
> Basic Rundown: you make a 280x192 or 280x160 graphic using the gimp
> and the pallet, save it as a ppm file, edit the convert.lua file to
> change what image file your working on, that spits out a ginormous
> list of HPLOT and HCOLOR commands that you copy n paste (hopefully in
> a emulator running as fast as it will go, otherwise prepare to be
> bored ... for a long while)
> 
> Gimp pallet:
> Apple-II.gpl  (save as)
> open The Gimp, right click in the main window, choose Windows >
> Dockable Dialogs > Palettes, this will open a pallets window, right
> click on that window, and choose Import Palette, choose Palette file
> and select the Apple-II.gpl file to install
> 
> Lua 5.1
> debian based systems do sudo apt-get install lua5.1
> MS windows download from http://luabinaries.sourceforge.net/download.html
> and unzip to c:\lua
> 
> Graphics:
> Make an image or convert an image using the supplied palette at
> 280x192 or 280x160 and save as a *.ppm file
> 
> Script:
> convert.lua (save as)
> edit the convert.lua file to point to the *.ppm file you are currently
> wanting to convert, and save
> 
> The convert.lua script as posted needs to be in the same directory as
> your ppm files !!
> If your using windows, AND unzipped to the suggested location above
> there is a "click n go" cmd file for you, everyone else will need to
> run lua convert.lua OR lua5.1 convert.lua from the command line. This
> reads the ppm file and produces a *.ppm_out file, which is just a
> bucket-ton of basic statements
> 
> You can then copy and paste them into an Apple II system, BSAVE them
> and recall them
> 
> BE WARNED!!
> this produces tens of thousands of HPLOT and HCOLOR statements, I
> strongly recommend you paste them into an emulator running at full
> tilt warp speed, Apple II win can do it in a matter of seconds, but
> needles in eyes speed at 1MHz, ALSO this does not account for any of
> the funnier aspects of the Apple II video system, what you see in the
> gimp is NOT what you get on the apple, but its close
> 
> Links:
> 
> Download here http://www.cheesefactory.us/apple2/gfxcv/
> Screenshots here (apple IIc) http://www.cheesefactory.us/apple2/gfxcv/screenshots/
> 
> enjoy

I converted the image to Index color using the colors in the Apple-II-LGR.gpl pallete in the GIMP. Color Dithering in the GIMP was off, and Transparency Dithering was off.