void CGColor::getHSV(float &h, float &s, float &v) const
{
// see https://de.wikipedia.org/wiki/HSV-Farbraum
float rr=redf();
float gg=greenf();
float bb=bluef();
float ma=std::max(std::max(rr,gg),bb);
float mi=std::min(std::min(rr,gg),bb);
if (ma==mi) h=0;
else if (ma==rr) h=60.0*(0.0+(gg-bb)/(ma-mi));
else if (ma==gg) h=60.0*(2.0+(bb-rr)/(ma-mi));
else if (ma==bb) h=60.0*(4.0+(rr-gg)/(ma-mi));
if (h<0.0) h=h+360.0;
if (ma==0.0) s=0.0;
else s=(ma-mi)/ma;
v=ma;
}
int main(int argc, char *argv[])
{
char *filename = argc < 2 ? "fat.ima" : argv[1];
FILE *f = fopen(filename, "r");
if(f == NULL) {
errorf("couldn't open file '%s'\n", filename);
return 1;
}
if(!check_sig(f))
return 1;
struct BPB_t bpb;
read_bytes(f, 0x0, &bpb, sizeof(bpb));
if(bpb.BytsPerSec != 512 || bpb.NumFATs != 2)
return 1;
greenf( "FAT addr: 0x%x\n"
"Root addr: 0x%x\n"
"Data addr: 0x%x\n",
BPB_FAT_addr(&bpb),
BPB_Root_addr(&bpb),
BPB_Data_addr(&bpb)
);
for(int i = 0; i < bpb.RootEntCnt; i++) {
struct dir_t dir;
uint32_t offset = BPB_Root_addr(&bpb) + i*32;
read_bytes(f, offset, &dir, sizeof(dir));
if(dir.Name[0] == 0) {
break;
} else if(dir.Name[0] == 0xE5) {
printf("<unused space>\n");
continue;
}
purplef("\n%.*s", (int)(sizeof(dir.Name)/sizeof(char)), dir.Name);
const char *type;
if(dir.Attr & DIR_ATTR_LFN) {
purplef("<LONG FILENAME>\n");
} else if(dir.Attr & DIR_ATTR_DIRECTORY) {
purplef("<DIRECTORY>\n");
} else {
purplef("<FILE>\n");
//if(i == 0xF)
// print_cluster(f, &bpb, &dir);
//else
printf("<omitting print>\n");
}
}
fclose(f);
return 0;
}