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/*
* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "CloneTool.h"
#include "../ImageEditor.h"
#include "../Layer.h"
#include <LibGUI/BoxLayout.h>
#include <LibGUI/Label.h>
#include <LibGUI/Menu.h>
#include <LibGUI/Painter.h>
#include <LibGUI/ValueSlider.h>
#include <LibGfx/Bitmap.h>
namespace PixelPaint {
void CloneTool::draw_point(Gfx::Bitmap& bitmap, Gfx::Color, Gfx::IntPoint point)
{
if (!m_sample_location.has_value())
return;
auto source_point = point - m_cursor_offset.value();
for (int y = -size(); y < size(); y++) {
for (int x = -size(); x < size(); x++) {
auto target_x = point.x() + x;
auto target_y = point.y() + y;
auto distance = point.distance_from({ target_x, target_y });
if (target_x < 0 || target_x >= bitmap.width() || target_y < 0 || target_y >= bitmap.height())
continue;
if (distance >= size())
continue;
auto source_x = source_point.x() + x;
auto source_y = source_point.y() + y;
if (source_x < 0 || source_x >= bitmap.width() || source_y < 0 || source_y >= bitmap.height())
continue;
auto falloff = get_falloff(distance);
auto pixel_color = bitmap.get_pixel(source_x, source_y);
pixel_color.set_alpha(falloff * pixel_color.alpha());
bitmap.set_pixel(target_x, target_y, bitmap.get_pixel(target_x, target_y).blend(pixel_color));
}
}
}
void CloneTool::draw_line(Gfx::Bitmap& bitmap, Gfx::Color color, Gfx::IntPoint start, Gfx::IntPoint end)
{
if (!m_sample_location.has_value())
return;
BrushTool::draw_line(bitmap, color, start, end);
}
Variant<Gfx::StandardCursor, NonnullRefPtr<Gfx::Bitmap const>> CloneTool::cursor()
{
if (m_is_selecting_location)
return Gfx::StandardCursor::Eyedropper;
return Gfx::StandardCursor::Crosshair;
}
void CloneTool::on_mousemove(Layer* layer, MouseEvent& event)
{
auto& image_event = event.image_event();
if (image_event.alt())
return;
if (m_cursor_offset.has_value()) {
auto old_sample_marker_rect = sample_marker_rect();
m_sample_location = image_event.position() - m_cursor_offset.value();
update_sample_marker(old_sample_marker_rect);
}
BrushTool::on_mousemove(layer, event);
}
void CloneTool::on_mousedown(Layer* layer, MouseEvent& event)
{
auto& image_event = event.image_event();
if (image_event.alt()) {
auto old_sample_marker_rect = sample_marker_rect();
m_sample_location = image_event.position();
m_cursor_offset = {};
update_sample_marker(old_sample_marker_rect);
return;
}
if (!m_sample_location.has_value())
return;
if (!m_cursor_offset.has_value())
m_cursor_offset = event.image_event().position() - m_sample_location.value();
BrushTool::on_mousedown(layer, event);
}
void CloneTool::on_second_paint(Layer const*, GUI::PaintEvent& event)
{
if (!m_sample_location.has_value())
return;
GUI::Painter painter(*m_editor);
painter.add_clip_rect(event.rect());
auto rect = sample_marker_rect();
painter.draw_ellipse_intersecting(rect.value(), m_marker_color, 1);
}
bool CloneTool::on_keydown(GUI::KeyEvent& event)
{
if (event.key() == KeyCode::Key_Alt && !m_is_selecting_location) {
m_is_selecting_location = true;
m_editor->update_tool_cursor();
return true;
}
return Tool::on_keydown(event);
}
void CloneTool::on_keyup(GUI::KeyEvent& event)
{
if (m_is_selecting_location && event.key() == KeyCode::Key_Alt) {
m_is_selecting_location = false;
m_editor->update_tool_cursor();
return;
}
}
ErrorOr<GUI::Widget*> CloneTool::get_properties_widget()
{
if (!m_properties_widget) {
auto properties_widget = TRY(GUI::Widget::try_create());
(void)TRY(properties_widget->try_set_layout<GUI::VerticalBoxLayout>());
auto size_container = TRY(properties_widget->try_add<GUI::Widget>());
size_container->set_fixed_height(20);
(void)TRY(size_container->try_set_layout<GUI::HorizontalBoxLayout>());
auto size_label = TRY(size_container->try_add<GUI::Label>("Size:"_short_string));
size_label->set_text_alignment(Gfx::TextAlignment::CenterLeft);
size_label->set_fixed_size(80, 20);
auto size_slider = TRY(size_container->try_add<GUI::ValueSlider>(Orientation::Horizontal, "px"_short_string));
size_slider->set_range(1, 100);
size_slider->set_value(size());
size_slider->on_change = [this](int value) {
auto old_sample_marker_rect = sample_marker_rect();
set_size(value);
update_sample_marker(old_sample_marker_rect);
};
set_primary_slider(size_slider);
auto hardness_container = TRY(properties_widget->try_add<GUI::Widget>());
hardness_container->set_fixed_height(20);
(void)TRY(hardness_container->try_set_layout<GUI::HorizontalBoxLayout>());
auto hardness_label = TRY(hardness_container->try_add<GUI::Label>(TRY("Hardness:"_string)));
hardness_label->set_text_alignment(Gfx::TextAlignment::CenterLeft);
hardness_label->set_fixed_size(80, 20);
auto hardness_slider = TRY(hardness_container->try_add<GUI::ValueSlider>(Orientation::Horizontal, "%"_short_string));
hardness_slider->set_range(1, 100);
hardness_slider->on_change = [&](int value) {
set_hardness(value);
};
hardness_slider->set_value(100);
set_secondary_slider(hardness_slider);
m_properties_widget = properties_widget;
}
return m_properties_widget.ptr();
}
Optional<Gfx::IntRect> CloneTool::sample_marker_rect()
{
if (!m_sample_location.has_value())
return {};
auto offset = AK::max(2, size());
Gfx::IntRect content_rect = {
m_sample_location.value().x() - offset,
m_sample_location.value().y() - offset,
offset * 2,
offset * 2
};
return m_editor->content_to_frame_rect(content_rect).to_type<int>();
}
void CloneTool::update_sample_marker(Optional<Gfx::IntRect> old_rect)
{
if (old_rect.has_value())
m_editor->update(old_rect.value().inflated(2, 2));
auto current_rect = sample_marker_rect();
if (current_rect.has_value())
m_editor->update(current_rect.value().inflated(2, 2));
}
}
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