Thaw the image's undo stack.
This procedure thaws the image's undo stack, allowing subsequent operations to store their undo steps. This is generally called in conjunction with undo_freeze to temporarily freeze an image undo stack. undo_thaw does NOT free the undo stack as undo_enable does, so is suited for situations where one wishes to leave the undo stack in the same state in which one found it despite non-destructively playing with the image in the meantime. An example would be in-situ plug-in previews. Balancing freezes and thaws and ensuring image consistency is the responsibility of the caller.
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The image. |
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TRUE if the image undo has been thawed. |