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160bda7228
https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#cother-other-default-operation-rules "The compiler is more likely to get the default semantics right and you cannot implement these functions better than the compiler."
121 lines
3.7 KiB
C++
121 lines
3.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "BucketTool.h"
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#include "../ImageEditor.h"
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#include "../Layer.h"
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#include <AK/HashTable.h>
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#include <AK/Queue.h>
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#include <LibGUI/BoxLayout.h>
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#include <LibGUI/Label.h>
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#include <LibGUI/Painter.h>
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#include <LibGUI/ValueSlider.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Rect.h>
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namespace PixelPaint {
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BucketTool::BucketTool()
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{
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m_cursor = Gfx::Bitmap::try_load_from_file("/res/icons/pixelpaint/bucket.png").release_value_but_fixme_should_propagate_errors();
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}
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static float color_distance_squared(Gfx::Color const& lhs, Gfx::Color const& rhs)
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{
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int a = rhs.red() - lhs.red();
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int b = rhs.green() - lhs.green();
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int c = rhs.blue() - lhs.blue();
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return (a * a + b * b + c * c) / (3.0f * 255.0f * 255.0f);
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}
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static void flood_fill(Gfx::Bitmap& bitmap, Gfx::IntPoint const& start_position, Color target_color, Color fill_color, int threshold)
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{
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VERIFY(bitmap.bpp() == 32);
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if (target_color == fill_color)
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return;
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if (!bitmap.rect().contains(start_position))
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return;
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float threshold_normalized_squared = (threshold / 100.0f) * (threshold / 100.0f);
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Queue<Gfx::IntPoint> queue;
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queue.enqueue(start_position);
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HashTable<Gfx::IntPoint> visited;
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while (!queue.is_empty()) {
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auto position = queue.dequeue();
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if (visited.contains(position))
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continue;
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visited.set(position);
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auto pixel_color = bitmap.get_pixel<Gfx::StorageFormat::BGRA8888>(position.x(), position.y());
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if (color_distance_squared(pixel_color, target_color) > threshold_normalized_squared)
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continue;
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bitmap.set_pixel<Gfx::StorageFormat::BGRA8888>(position.x(), position.y(), fill_color);
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if (position.x() != 0)
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queue.enqueue(position.translated(-1, 0));
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if (position.x() != bitmap.width() - 1)
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queue.enqueue(position.translated(1, 0));
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if (position.y() != 0)
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queue.enqueue(position.translated(0, -1));
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if (position.y() != bitmap.height() - 1)
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queue.enqueue(position.translated(0, 1));
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}
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}
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void BucketTool::on_mousedown(Layer* layer, MouseEvent& event)
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{
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if (!layer)
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return;
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auto& layer_event = event.layer_event();
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if (!layer->rect().contains(layer_event.position()))
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return;
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GUI::Painter painter(layer->bitmap());
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auto target_color = layer->bitmap().get_pixel(layer_event.x(), layer_event.y());
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flood_fill(layer->bitmap(), layer_event.position(), target_color, m_editor->color_for(layer_event), m_threshold);
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layer->did_modify_bitmap();
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m_editor->did_complete_action();
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}
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GUI::Widget* BucketTool::get_properties_widget()
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{
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if (!m_properties_widget) {
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m_properties_widget = GUI::Widget::construct();
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m_properties_widget->set_layout<GUI::VerticalBoxLayout>();
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auto& threshold_container = m_properties_widget->add<GUI::Widget>();
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threshold_container.set_fixed_height(20);
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threshold_container.set_layout<GUI::HorizontalBoxLayout>();
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auto& threshold_label = threshold_container.add<GUI::Label>("Threshold:");
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threshold_label.set_text_alignment(Gfx::TextAlignment::CenterLeft);
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threshold_label.set_fixed_size(80, 20);
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auto& threshold_slider = threshold_container.add<GUI::ValueSlider>(Orientation::Horizontal, "%");
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threshold_slider.set_range(0, 100);
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threshold_slider.set_value(m_threshold);
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threshold_slider.on_change = [&](int value) {
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m_threshold = value;
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};
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set_primary_slider(&threshold_slider);
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}
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return m_properties_widget.ptr();
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}
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}
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