HelenOS sources

GC_BITMAP_CREATE  226 uspace/lib/ipcgfx/src/client.c 	req = async_send_0(exch, GC_BITMAP_CREATE, &answer);
GC_BITMAP_CREATE  402 uspace/lib/ipcgfx/src/server.c 		case GC_BITMAP_CREATE:
HelenOS homepage, sources at GitHub