Tools to convert graphics in order to use them on the C64. Graphics encompasses bitmap and PETSCII graphics.

Convert a 128*128 pixel black and white graphic into a font.

Convert a 320*200 pixel hires bitmap into a C64 format.

Convert a 80*50 pixel bw image into a petscii screen.

Convert animation in the *.c format into binary data.

Convert a spritesheet image into sprite data.

The following libraries must be installed:

• libmagick++
• SDL2
• SDL2 image library

On a Debian based system the following command will do:

sudo apt-get install libmagick++-dev libsdl2-image-dev libsdl2-dev

If you forgot to clone the repository recursively then install and update the git submodules with

git submodule init
git submodule update

Then issue "make".

Call the program with an image file. Only the upper left 320 times 200 pixels are converted.

graphconv <filename>

• http://www.syntiac.com/tech_ga_c64.html
• http://www.spritemate.com/

• https://www.r-bloggers.com/r-is-a-cool-image-editor-2-dithering-algorithms/
• http://www.tannerhelland.com/4660/dithering-eleven-algorithms-source-code/
• http://cv.ulichney.com/papers/2006-hexagonal-blue-noise.pdf
• http://ulichney.com/
• https://www.imaging.org/site/PDFS/Papers/1999/RP-0-93/1786.pdf