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LibGfx: Start a very basic anti-aliased Painter implementation

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This can currently draw AA lines (and by proxy, AA paths), and passes
all its output through a 2D affine transform to an underlying
Gfx::Painter.
This commit is contained in:
Ali Mohammad Pur 2021-09-17 12:01:48 +04:30 • committed by Ali Mohammad Pur
parent f4ea235a33
commit e2cd558101
5 changed files with 364 additions and 157 deletions
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34
Userland/Libraries/LibGfx/AntiAliasingPainter.h Normal file
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/*
* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <LibGfx/Painter.h>
namespace Gfx {
class AntiAliasingPainter {
public:
explicit AntiAliasingPainter(Painter& painter)
: m_underlying_painter(painter)
{
}
void draw_line(FloatPoint const&, FloatPoint const&, Color, float thickness = 1, Painter::LineStyle style = Painter::LineStyle::Solid, Color alternate_color = Color::Transparent);
void fill_path(Path&, Color, Painter::WindingRule rule = Painter::WindingRule::Nonzero);
void stroke_path(Path const&, Color, float thickness);
void draw_quadratic_bezier_curve(FloatPoint const& control_point, FloatPoint const&, FloatPoint const&, Color, float thickness = 1, Painter::LineStyle style = Painter::LineStyle::Solid);
void draw_elliptical_arc(FloatPoint const& p1, FloatPoint const& p2, FloatPoint const& center, FloatPoint const& radii, float x_axis_rotation, float theta_1, float theta_delta, Color, float thickness = 1, Painter::LineStyle style = Painter::LineStyle::Solid);
void translate(float dx, float dy) { m_transform.translate(dx, dy); }
void translate(FloatPoint const& delta) { m_transform.translate(delta); }
private:
Painter& m_underlying_painter;
AffineTransform m_transform;
};
}