constructWithLookUpTable()

XYMap fl::XYMap::constructWithLookUpTable ( u16 width, u16 height, const u16 * lookUpTable, u16 offset = 0 )

static

Definition at line 43 of file xymap.cpp.hpp.

                                                               {
    XYMap out(width, height, kLookUpTable);
    out.mLookUpTable = fl::make_shared<LUT16>(width * height);
    // A null table means "allocate it, I will fill it" -- which is what
    // `fromXMap` below asks for, and it used to `memcpy` from nullptr and
    // segfault every caller of `Channel::setScreenMap(const XMap&)`
    // (#4201). `LUT16` zeroes its storage, so the unfilled case is an
    // identity-free map rather than garbage.
    if (lookUpTable != nullptr) {
        fl::memcpy(out.mLookUpTable->getDataMutable(), lookUpTable,
                   width * height * sizeof(u16));
    }
    out.mOffset = offset;
    return out;
}

References XYMap(), fl::FL_NO_EXCEPT, height, kLookUpTable, fl::adl_barrier::make_shared(), fl::memcpy(), mLookUpTable, mOffset, offset(), and width.

Referenced by fromXMap().

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