TODO: Consider sample position

Is this the default chroma offset for the subsampling type?

Load one playlist item. Load it and return it. This function is separate so it can be called recursively if an item has children.

Resize the target array if necessary and read the given number of bytes to the data array

In the best case (TGA 2.0 spec) this should read just one scanline, but in old TGA versions (1.0) it was possible to save several scanlines with the s

Each playlistitem can remember the position/zoom that it was shown in to recall when it is selected again

Raw values are shown if the zoom factor is high enough or if the zoom box is shown.

Start the asynchronous checking for an update.

is the item being deleted?

The children of this item might have changed. If yes, update the properties of this item and emit the SignalItemChanged(true).

(7-55)

Re-sample the chroma component so that the chroma samples and the luma samples are aligned after this operation.