Converts an image to match Commodore 64 graphic modes specifications. Designed to be used as part of a development toolchain, for example together with other tools like:
- ImageMagick
- png2prg. retrospex is specifically designed for compatibility with
png2prg - spot
Usage: retrospex [options] input.png
Options:
-o
Output filename (default out.png)
-m
Graphics mode. (default koala), One of sccharset,mcibitmap,koala,hires,mixedcharset,mccharset
-p
Palette (default colodore). One of archmage,perplex_1,lenyn,colodore,vice_old_lum,vice_371_internal,electric,ste,perplex_2,pepto,vice,pantaloon
-dm
Dither matrix (default bayer4x4). One of bayer4x4,bayer8x8,none,bayer2x2
-dd
Dither depth (default 25). 0-255graph TD
image((image)) -- PNG --> ImageMagick
ImageMagick -- color adjusted, resized, cropped PNG --> retrospex
retrospex -- quantized PNG --> png2prg
c64image((C64 executable))
png2prg -- koala --> c64image
music((music)) -- SID --> png2prg
Create a c64 executable from madonna.png with music Whos_That_Girl.sid:
#!/bin/bash
INPUT=madonna
# use https://imagemagick.org to resize and normalize source image
convert ${INPUT}.png -normalize -resize 320x200^ -gravity center -extent 320x200 ${INPUT}01.png
# use retrospex to convert to c64 specs
retrospex -m koala -o ${INPUT}02.png ${INPUT}01.png
# use https://github.com/staD020/png2prg to convert to c64 executable with music
png2prg -v -d -sid Whos_That_Girl.sid ${INPUT}02.png
# open the result in https://vice-emu.sourceforge.io/
x64sc ${INPUT}02.prg