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Optimized keyboard input

This commit is contained in:
taoenwen 2025-06-30 20:09:14 +08:00
parent 1d9bd6c8a6
commit c87f77ab82
1 changed files with 27 additions and 9 deletions
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36
src/burn/devices/joyprocess.h
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@ -115,29 +115,47 @@ struct HoldCoin {
template <int N, typename T>
struct ClearOpposite {
T prev[N<<2];
T prev[N << 2], prev_a[N << 2], prev_b[N << 2];
void reset() {
memset(&prev, 0, sizeof(prev));
memset(&prev, 0, sizeof(prev));
memset(&prev_a, 0, sizeof(prev_a));
memset(&prev_b, 0, sizeof(prev_b));
}
void scan() {
SCAN_VAR(prev);
SCAN_VAR(prev_a);
SCAN_VAR(prev_b);
}
void checkval(UINT8 n, T &inp, T val_a, T val_b) {
// When opposites become pressed simultaneously, and a 3rd direction isn't pressed
// remove the previously stored direction if it exists, cancel both otherwise
if ((inp & val_a) == val_a)
inp &= (prev[n] && (inp & val_b) == 0 ? (inp ^ prev[n]) : ~val_a);
// Store direction anytime it's pressed without its opposite
inp &= (inp ^ prev_a[n]);
else if (inp & val_a)
prev[n] = inp & val_a;
prev_a[n] = inp & val_a;
if ((inp & val_b) == val_b)
inp &= (inp ^ prev_b[n]);
else if (inp & val_b)
prev_b[n] = inp & val_b;
if ((inp & val_a) == val_a)
inp &= ~val_a;
if ((inp & val_b) == val_b)
inp &= ~val_b;
// Handling cross-frame conflicts
if (((inp | prev[n]) & val_a) == val_a)
inp &= ~val_a;
if (((inp | prev[n]) & val_b) == val_b)
inp &= ~val_b;
prev[n] = inp;
}
void check(UINT8 num, T &inp, T val1, T val2) {
checkval((num<<1) , inp, val1, val2);
checkval((num<<1)+1, inp, val2, val1);
checkval((num<<1), inp, val1, val2);
checkval((num << 1) | 1, inp, val2, val1);
}
};