/*
 * Copyright (c) 2020-2021, Andreas Kling <kling@serenityos.org>
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include "Layer.h"
#include "Image.h"
#include <LibGfx/Bitmap.h>

namespace PixelPaint {

RefPtr<Layer> Layer::try_create_with_size(Image& image, Gfx::IntSize const& size, String name)
{
    if (size.is_empty())
        return nullptr;

    if (size.width() > 16384 || size.height() > 16384)
        return nullptr;

    auto bitmap = Gfx::Bitmap::create(Gfx::BitmapFormat::BGRA8888, size);
    if (!bitmap)
        return nullptr;

    return adopt_ref(*new Layer(image, *bitmap, move(name)));
}

RefPtr<Layer> Layer::try_create_with_bitmap(Image& image, NonnullRefPtr<Gfx::Bitmap> bitmap, String name)
{
    if (bitmap->size().is_empty())
        return nullptr;

    if (bitmap->size().width() > 16384 || bitmap->size().height() > 16384)
        return nullptr;

    return adopt_ref(*new Layer(image, bitmap, move(name)));
}

RefPtr<Layer> Layer::try_create_snapshot(Image& image, Layer const& layer)
{
    auto snapshot = try_create_with_bitmap(image, *layer.bitmap().clone(), layer.name());
    /*
        We set these properties directly because calling the setters might 
        notify the image of an update on the newly created layer, but this 
        layer has not yet been added to the image.
    */
    snapshot->m_opacity_percent = layer.opacity_percent();
    snapshot->m_visible = layer.is_visible();

    snapshot->set_selected(layer.is_selected());
    snapshot->set_location(layer.location());

    return snapshot;
}

Layer::Layer(Image& image, NonnullRefPtr<Gfx::Bitmap> bitmap, String name)
    : m_image(image)
    , m_name(move(name))
    , m_bitmap(move(bitmap))
{
}

void Layer::did_modify_bitmap(Image& image)
{
    image.layer_did_modify_bitmap({}, *this);
}

void Layer::set_visible(bool visible)
{
    if (m_visible == visible)
        return;
    m_visible = visible;
    m_image.layer_did_modify_properties({}, *this);
}

void Layer::set_opacity_percent(int opacity_percent)
{
    if (m_opacity_percent == opacity_percent)
        return;
    m_opacity_percent = opacity_percent;
    m_image.layer_did_modify_properties({}, *this);
}

void Layer::set_name(String name)
{
    if (m_name == name)
        return;
    m_name = move(name);
    m_image.layer_did_modify_properties({}, *this);
}

}