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PixelPaint: Undo and redo actions

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The most used feature of any image editor, undo. Each tool now
notifies the ImageEditor that they completed an action, where
it'll take a snapshot if its current state.

For now, a snapshot is just a copy of the whole image and its
layers. There's a hard limit on the amount of actions it stores.
This commit is contained in:
BenJilks 2020-10-17 16:47:34 +00:00 • committed by Andreas Kling
parent 5aeab9878e
commit 1c27568ab0
21 changed files with 256 additions and 2 deletions
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Applications/PixelPaint/Layer.h
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@ -46,6 +46,7 @@ class Layer
public:
static RefPtr<Layer> create_with_size(Image&, const Gfx::IntSize&, const String& name);
static RefPtr<Layer> create_with_bitmap(Image&, const Gfx::Bitmap&, const String& name);
static RefPtr<Layer> create_snapshot(Image&, const Layer&);
~Layer() { }