Prepare to repair damaged layer.
Source position: layers.pas line 89
function BeginUpdate( |
l: pLayer |
):LongInt; |
l |
|
pointer to a layer |
True if damage list converted to ClipRect list successfully. False if list conversion aborted. (probably out of memory)
Convert damage list to ClipRect list and swap in for programmer to redraw through. This routine simulates the ROM library environment. The idea is to only render in the "damaged" areas, saving time over redrawing all of the layer. The layer is locked against changes made by the layer library.
If BeginUpdate returns False, programmer must abort the attempt to refresh this layer and instead call EndUpdate(Layer, False) to restore original ClipRect and damage list.
|
remove damage list and restore state of layer to normal. |