nblendPaletteTowardPalette()

void fl::nblendPaletteTowardPalette	(	CRGBPalette16 &	current,
		CRGBPalette16 &	target,
		fl::u8	maxChanges )

Definition at line 1333 of file colorutils.cpp.hpp.

                                                              {
    if (maxChanges == 0) {
        return;
    }
 
    fl::u8 *p1;
    fl::u8 *p2;
    fl::u8 changes = 0;
 
    p1 = (fl::u8 *)current.entries;
    p2 = (fl::u8 *)target.entries;
 
    const fl::u8 totalChannels = sizeof(CRGBPalette16);
    for (fl::u8 i = 0; i < totalChannels; ++i) {
        // if the values are equal, no changes are needed
        if (p1[i] == p2[i]) {
            continue;
        }
 
        // if the current value is less than the target, increase it by one
        if (p1[i] < p2[i]) {
            ++p1[i];
            ++changes;
        }
 
        // if the current value is greater than the target,
        // increase it by one (or two if it's still greater).
        if (p1[i] > p2[i]) {
            --p1[i];
            ++changes;
            if (p1[i] > p2[i]) {
                --p1[i];
            }
        }
 
        // if we've hit the maximum number of changes, exit
        if (changes >= maxChanges) {
            break;
        }
    }
}

References FL_NO_EXCEPT.

Referenced by fl::TwinkleFox::draw(), and FL_DISABLE_WARNING().

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