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/*
* Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/HashTable.h>
#include <AK/NonnullRefPtrVector.h>
#include <AK/RefCounted.h>
#include <AK/RefPtr.h>
#include <AK/Result.h>
#include <AK/Vector.h>
#include <LibGUI/Command.h>
#include <LibGUI/Forward.h>
#include <LibGfx/Forward.h>
#include <LibGfx/Rect.h>
#include <LibGfx/Size.h>
namespace PixelPaint {
class Layer;
class ImageClient {
public:
virtual void image_did_add_layer(size_t) { }
virtual void image_did_remove_layer(size_t) { }
virtual void image_did_modify_layer_properties(size_t) { }
virtual void image_did_modify_layer_bitmap(size_t) { }
virtual void image_did_modify_layer_stack() { }
virtual void image_did_change(Gfx::IntRect const&) { }
virtual void image_select_layer(Layer*) { }
virtual void image_did_change_title(String const&) { }
protected:
virtual ~ImageClient() = default;
};
class Image : public RefCounted<Image> {
public:
static RefPtr<Image> try_create_with_size(Gfx::IntSize const&);
static Result<NonnullRefPtr<Image>, String> try_create_from_file(String const& file_path);
static RefPtr<Image> try_create_from_bitmap(NonnullRefPtr<Gfx::Bitmap>);
// This generates a new Bitmap with the final image (all layers composed according to their attributes.)
RefPtr<Gfx::Bitmap> try_compose_bitmap(Gfx::BitmapFormat format) const;
size_t layer_count() const { return m_layers.size(); }
Layer const& layer(size_t index) const { return m_layers.at(index); }
Layer& layer(size_t index) { return m_layers.at(index); }
Gfx::IntSize const& size() const { return m_size; }
Gfx::IntRect rect() const { return { {}, m_size }; }
void add_layer(NonnullRefPtr<Layer>);
RefPtr<Image> take_snapshot() const;
void restore_snapshot(Image const&);
void paint_into(GUI::Painter&, Gfx::IntRect const& dest_rect) const;
Result<void, String> write_to_file(String const& file_path) const;
Result<void, String> export_bmp_to_file(String const& file_path, bool preserve_alpha_channel);
Result<void, String> export_png_to_file(String const& file_path, bool preserve_alpha_channel);
void move_layer_to_front(Layer&);
void move_layer_to_back(Layer&);
void move_layer_up(Layer&);
void move_layer_down(Layer&);
void change_layer_index(size_t old_index, size_t new_index);
void remove_layer(Layer&);
void select_layer(Layer*);
void flatten_all_layers();
void merge_visible_layers();
void add_client(ImageClient&);
void remove_client(ImageClient&);
void layer_did_modify_bitmap(Badge<Layer>, Layer const&, Gfx::IntRect const& modified_layer_rect);
void layer_did_modify_properties(Badge<Layer>, Layer const&);
size_t index_of(Layer const&) const;
String const& path() const { return m_path; }
void set_path(String);
String const& title() const { return m_title; }
void set_title(String);
private:
explicit Image(Gfx::IntSize const&);
static Result<NonnullRefPtr<Image>, String> try_create_from_pixel_paint_file(String const& file_path);
void did_change(Gfx::IntRect const& modified_rect = {});
void did_modify_layer_stack();
String m_path;
String m_title;
Gfx::IntSize m_size;
NonnullRefPtrVector<Layer> m_layers;
HashTable<ImageClient*> m_clients;
};
class ImageUndoCommand : public GUI::Command {
public:
ImageUndoCommand(Image& image);
virtual void undo() override;
virtual void redo() override;
private:
RefPtr<Image> m_snapshot;
Image& m_image;
};
}
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