// ConvertPal converts the src palette based on the provided TRN file and
// returns it as a color.Palette.
//
// Note: The absolute path of relTrnPath is relative to mpq.ExtractPath.
func ConvertPal(src color.Palette, relTrnPath string) (dst color.Palette, err error) {
trnPath := mpq.AbsPath(relTrnPath)
trn, err := ioutil.ReadFile(trnPath)
if err != nil {
return nil, err
}
if len(trn) != 256 {
return nil, fmt.Errorf("trn.ConvertPal: invalid TRN size (%d) for %q", len(trn), relTrnPath)
}
// ref: 46567D
dst = make(color.Palette, 256)
for i := range dst {
dst[i] = src[trn[i]]
}
return dst, nil
}
// GetPal parses the provided PAL file and returns it as a color.Palette. Below
// is a description of the PAL format.
//
// PAL format:
// c [256]Color
//
// Color format:
// r byte // red
// g byte // green
// b byte // blue
//
// Note: The absolute path of relPalPath is relative to mpq.ExtractPath.
func GetPal(relPalPath string) (pal color.Palette, err error) {
palPath := mpq.AbsPath(relPalPath)
buf, err := ioutil.ReadFile(palPath)
if err != nil {
return nil, err
}
if len(buf) != 256*3 {
return nil, fmt.Errorf("cel.GetPal: invalid pal size (%d) for %q", len(buf), relPalPath)
}
pal = make(color.Palette, 256)
for i := range pal {
c := color.RGBA{
R: buf[3*i],
G: buf[3*i+1],
B: buf[3*i+2],
A: 0xFF,
}
pal[i] = c
}
return pal, nil
}