Method VisitorFill

src/fl/gfx/gradient.cpp.hpp:43–52

struct VisitorFill {
    VisitorFill(span<const u8> indices, span<CRGB> output)
        : output(output), indices(indices) {
        // This assert was triggering on the corkscrew example. Not sure why
        // but the corrective action of taking the min was corrective action.
        // FASTLED_ASSERT(
        //     indices.size() == output.size(),
        //     "Gradient::fill: indices and output must be the same size"
        //     "\nSize was" << indices.size() << " and " << output.size());
        n = fl::min(indices.size(), output.size());
    }
    void accept(const CRGBPalette16 *palette) {
        for (fl::size i = 0; i < n; ++i) {
            output[i] = ColorFromPalette(*palette, indices[i]);