if it's a gray cartridge game), then the game is displayed using three separate palettes (called 'BG0', 'OBJ0', and 'OBJ1'). If the game was not designed to be played on the Game Boy Color (i.e. (Probably 24-bit RGB, but maybe some sort of indexed coloring? I have no idea.) The 4 colors within that cell are then re-rendered according to that cell's palette.ģ.) I'm not sure what kind of color the Game Boy Color uses. each 8x8-pixel region) is assigned one of the four palettes. Then you divide the screen into a grid of 20 columns by 18 rows, in which each grid cell (i.e. But you can't just put the 13 colors wherever you want: you need to follow these rules: First you render the screen in 4 colors as if it were a regular Game Boy. If the Game Boy game was designed for the Super Game Boy, then it can use four palettes of 4 colors each, for a total of 13 colors on the screen at any given time (should be 16 colors, but color #0 is shared between all four palettes). (Pretty much the same idea as the Game Boy, but using 4 separate colors rather than 4 shades.) If the game was not designed to be played on the Super Game Boy, then the Super Game Boy uses a single palette of 4 colors. Basically, you're limited to 4 shades of a single color (whatever color the physical screen is).Ģ.) The Super Game Boy uses 15-bit BGR color. The Game Boy Pocket screen uses 4 shades of gray. If you haven't done the research, here's a brief (oversimplified) explanation:ġ.) The Game Boy screen uses 4 shades of green. You'll also need shader to reduce the number of colors on the screen down to 4, if your screen has more than 4 colors.īut the Game Boy games are shaded differently depending upon whether they are being played in a Game Boy (original Game Boy or Game Boy pocket), a Super Game Boy, or a Game Boy Color.

Gamemaker palette swap