The CPAL attachment (Color Palette) allows plug-ins that load files with palettes to share those palettes with Chasys Draw IES. Such palettes may be used to populate the Palette window in the user interface for Chasys Draw IES. The metadata consists of a host-defined structure of a fixed length:
#define META_CPAL_VERSION 0x0001
struct meta_CPAL_Obj
{
unsigned short version; //CPAL version
unsigned short count; //number of colors in palette
unsigned char unused_1; //unused, set to 0
unsigned char colors[256]; //flags
};
The plug-in requests metadata of size sizeof(meta_CPAL_Obj). The plug-in then proceeds to fill the structure with the colors in the palette, the number of colors and the version of the structure.
