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PixelPaint: Add option for antialiased lines

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MacDue 2022-06-01 19:09:55 +01:00 • committed by Andreas Kling
parent bc5dd8dd0f
commit a30c81104d
2 changed files with 34 additions and 2 deletions
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33
Userland/Applications/PixelPaint/Tools/LineTool.cpp
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@ -1,6 +1,7 @@
/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
* Copyright (c) 2022, MacDue <macdue@dueutil.tech>
* Copyright (c) 2022, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
@ -12,10 +13,12 @@
#include <AK/Math.h>
#include <LibGUI/Action.h>
#include <LibGUI/BoxLayout.h>
#include <LibGUI/CheckBox.h>
#include <LibGUI/Label.h>
#include <LibGUI/Menu.h>
#include <LibGUI/Painter.h>
#include <LibGUI/ValueSlider.h>
#include <LibGfx/AntiAliasingPainter.h>
namespace PixelPaint {
@ -53,6 +56,19 @@ void LineTool::on_mousedown(Layer* layer, MouseEvent& event)
m_editor->update();
}
void LineTool::draw_using(GUI::Painter& painter, Gfx::IntPoint const& start_position, Gfx::IntPoint const& end_position, Color color, int thickness)
{
if (m_antialias_enabled) {
Gfx::AntiAliasingPainter aa_painter { painter };
auto as_float_point = [](auto const& point) {
return Gfx::FloatPoint { point.x(), point.y() };
};
aa_painter.draw_line(as_float_point(start_position), as_float_point(end_position), color, thickness);
} else {
painter.draw_line(start_position, end_position, color, thickness);
}
}
void LineTool::on_mouseup(Layer* layer, MouseEvent& event)
{
if (!layer)
@ -61,7 +77,7 @@ void LineTool::on_mouseup(Layer* layer, MouseEvent& event)
auto& layer_event = event.layer_event();
if (layer_event.button() == m_drawing_button) {
GUI::Painter painter(layer->currently_edited_bitmap());
painter.draw_line(m_line_start_position, m_line_end_position, m_editor->color_for(m_drawing_button), m_thickness);
draw_using(painter, m_line_start_position, m_line_end_position, m_editor->color_for(m_drawing_button), m_thickness);
m_drawing_button = GUI::MouseButton::None;
layer->did_modify_bitmap();
m_editor->update();
@ -103,7 +119,7 @@ void LineTool::on_second_paint(Layer const* layer, GUI::PaintEvent& event)
painter.add_clip_rect(event.rect());
auto preview_start = editor_stroke_position(m_line_start_position, m_thickness);
auto preview_end = editor_stroke_position(m_line_end_position, m_thickness);
painter.draw_line(preview_start, preview_end, m_editor->color_for(m_drawing_button), AK::max(m_thickness * m_editor->scale(), 1));
draw_using(painter, preview_start, preview_end, m_editor->color_for(m_drawing_button), AK::max(m_thickness * m_editor->scale(), 1));
}
void LineTool::on_keydown(GUI::KeyEvent& event)
@ -138,6 +154,19 @@ GUI::Widget* LineTool::get_properties_widget()
m_thickness = value;
};
set_primary_slider(&thickness_slider);
auto& mode_container = m_properties_widget->add<GUI::Widget>();
mode_container.set_fixed_height(20);
mode_container.set_layout<GUI::HorizontalBoxLayout>();
auto& mode_label = mode_container.add<GUI::Label>("Mode:");
mode_label.set_text_alignment(Gfx::TextAlignment::CenterLeft);
mode_label.set_fixed_size(80, 20);
auto& aa_enable_checkbox = mode_container.add<GUI::CheckBox>("Anti-alias");
aa_enable_checkbox.on_checked = [&](bool checked) {
m_antialias_enabled = checked;
};
}
return m_properties_widget.ptr();

3
Userland/Applications/PixelPaint/Tools/LineTool.h
View file

@ -26,6 +26,8 @@ public:
virtual GUI::Widget* get_properties_widget() override;
virtual Variant<Gfx::StandardCursor, NonnullRefPtr<Gfx::Bitmap>> cursor() override { return Gfx::StandardCursor::Crosshair; }
void draw_using(GUI::Painter&, Gfx::IntPoint const& start_position, Gfx::IntPoint const& end_position, Color color, int thickness);
private:
RefPtr<GUI::Widget> m_properties_widget;
@ -34,6 +36,7 @@ private:
Gfx::IntPoint m_line_start_position;
Gfx::IntPoint m_line_end_position;
int m_thickness { 1 };
bool m_antialias_enabled { false };
};
}