Tim Mayberry c4e31fc322 Add an optional ArdourCanvas::Item::prepare_for_render interface ...

Called when an item has requested a redraw and intersects with visible
canvas area.

Also add Canvas::prepare_for_render that will call Item::prepare_for_render for
items visible on the canvas.

2017-06-26 08:40:47 +10:00

1.4 KiB

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