fromXMap()

XYMap fl::XYMap::fromXMap ( const XMap & xmap )

static

Create an XYMap from an XMap (treats 1D as 2D with height=1)

Parameters

xmap	1D addressing map

Returns

XYMap with width=xmap.length and height=1

Definition at line 68 of file xymap.cpp.hpp.

                                                   {
    // Create an XYMap with width=xmap.length and height=1
    // This treats the 1D strip as a 2D grid with height 1
    u16 length = xmap.getLength();
 
    // Null rather than a table: the LUT is allocated here and filled just
    // below, which is what the null case in `constructWithLookUpTable`
    // exists for.
    auto out = XYMap::constructWithLookUpTable(length, 1, nullptr);
    fl::shared_ptr<LUT16> lut = fl::make_shared<LUT16>(length);
    u16* data = lut->getDataMutable();
 
    // Fill the LUT with xmap's mappings
    for (u16 i = 0; i < length; i++) {
        data[i] = xmap.mapToIndex(i);
    }
 
    out.mLookUpTable = lut;
    return out;
}

References XYMap(), constructWithLookUpTable(), fl::FL_NO_EXCEPT, length(), and fl::adl_barrier::make_shared().

Referenced by fl::Channel::setScreenMap().

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