Chili GBA

Chili is a Game Boy Advance tile editor.

User guide

Basic editing:

LMB/RMB to draw using color L/R or to select colors from Color box.
Shift+LMB/RMB to pick color from Zoom box.
Ctrl+LMB/RMB to draw, fill or color replace using transparent color.
Alt+LMB/RMB to draw from copy buffer.
In Shade mode LMB/RMB gradually fades pixel values towards the desired color. Colors L and R define the color range.

Drawing tools:

Color Box:

Export:

Tile Data is exported in raw binary format. Only the tiles numbered 0 through the current Last Tile setting are exported.
When using Two-Dimensional VRAM Mapping the end of data is aligned. (A few extra tiles may be included to fill up the last VRAM row).

Bitmap import:

Images bigger than the current tile size are split into multiple tiles starting from the current Tile Index.
The slicing is done from left to right, top to bottom.
The color attribute at top-left corner is assigned to transparent.
No color reduction is implemented.

Game Boy Advance:

GBA has 96K of VRAM which is shared by BG character/bitmap data, screen maps and OBJ character data. BG and OBJ both have an own 256 color palette.
Chili allocates a 32K VRAM block and one 256 color palette per file. Thus, for most practical use you should use a separate file for BG and OBJ tiles.