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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Forward.h>
#include <AK/NonnullRefPtr.h>
#include <AK/Utf8View.h>
#include <AK/Vector.h>
#include <LibGfx/Color.h>
#include <LibGfx/Font/FontDatabase.h>
#include <LibGfx/Forward.h>
#include <LibGfx/Point.h>
#include <LibGfx/Rect.h>
#include <LibGfx/Size.h>
#include <LibGfx/TextAlignment.h>
#include <LibGfx/TextDirection.h>
#include <LibGfx/TextElision.h>
#include <LibGfx/TextWrapping.h>
namespace Gfx {
class Painter {
public:
explicit Painter(Gfx::Bitmap&);
~Painter() = default;
enum class LineStyle {
Solid,
Dotted,
Dashed,
};
enum class ScalingMode {
NearestNeighbor,
SmoothPixels,
BilinearBlend,
};
void clear_rect(IntRect const&, Color);
void fill_rect(IntRect const&, Color);
void fill_rect_with_dither_pattern(IntRect const&, Color, Color);
void fill_rect_with_checkerboard(IntRect const&, IntSize const&, Color color_dark, Color color_light);
void fill_rect_with_gradient(Orientation, IntRect const&, Color gradient_start, Color gradient_end);
void fill_rect_with_gradient(IntRect const&, Color gradient_start, Color gradient_end);
void fill_rect_with_rounded_corners(IntRect const&, Color, int radius);
void fill_rect_with_rounded_corners(IntRect const&, Color, int top_left_radius, int top_right_radius, int bottom_right_radius, int bottom_left_radius);
void fill_ellipse(IntRect const&, Color);
void draw_rect(IntRect const&, Color, bool rough = false);
void draw_rect_with_thickness(IntRect const&, Color, int thickness);
void draw_focus_rect(IntRect const&, Color);
void draw_bitmap(IntPoint const&, CharacterBitmap const&, Color = Color());
void draw_bitmap(IntPoint const&, GlyphBitmap const&, Color = Color());
void draw_scaled_bitmap(IntRect const& dst_rect, Gfx::Bitmap const&, IntRect const& src_rect, float opacity = 1.0f, ScalingMode = ScalingMode::NearestNeighbor);
void draw_scaled_bitmap(IntRect const& dst_rect, Gfx::Bitmap const&, FloatRect const& src_rect, float opacity = 1.0f, ScalingMode = ScalingMode::NearestNeighbor);
void draw_triangle(IntPoint const&, IntPoint const&, IntPoint const&, Color);
void draw_triangle(IntPoint const& offset, Span<IntPoint const>, Color);
void draw_ellipse_intersecting(IntRect const&, Color, int thickness = 1);
void set_pixel(IntPoint const&, Color, bool blend = false);
void set_pixel(int x, int y, Color color, bool blend = false) { set_pixel({ x, y }, color, blend); }
Optional<Color> get_pixel(IntPoint const&);
void draw_line(IntPoint const&, IntPoint const&, Color, int thickness = 1, LineStyle style = LineStyle::Solid, Color alternate_color = Color::Transparent);
void draw_triangle_wave(IntPoint const&, IntPoint const&, Color color, int amplitude, int thickness = 1);
void draw_quadratic_bezier_curve(IntPoint const& control_point, IntPoint const&, IntPoint const&, Color, int thickness = 1, LineStyle style = LineStyle::Solid);
void draw_cubic_bezier_curve(IntPoint const& control_point_0, IntPoint const& control_point_1, IntPoint const&, IntPoint const&, Color, int thickness = 1, LineStyle style = LineStyle::Solid);
void draw_elliptical_arc(IntPoint const& p1, IntPoint const& p2, IntPoint const& center, FloatPoint const& radii, float x_axis_rotation, float theta_1, float theta_delta, Color, int thickness = 1, LineStyle style = LineStyle::Solid);
void blit(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect, float opacity = 1.0f, bool apply_alpha = true);
void blit_dimmed(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect);
void blit_brightened(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect);
void blit_filtered(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect, Function<Color(Color)>);
void draw_tiled_bitmap(IntRect const& dst_rect, Gfx::Bitmap const&);
void blit_offset(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect, IntPoint const&);
void blit_disabled(IntPoint const&, Gfx::Bitmap const&, IntRect const&, Palette const&);
void blit_tiled(IntRect const&, Gfx::Bitmap const&, IntRect const& src_rect);
void draw_text(IntRect const&, StringView, Font const&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
void draw_text(IntRect const&, StringView, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
void draw_text(IntRect const&, Utf32View const&, Font const&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
void draw_text(IntRect const&, Utf32View const&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
void draw_text(Function<void(IntRect const&, Utf8CodePointIterator&)>, IntRect const&, StringView, Font const&, TextAlignment = TextAlignment::TopLeft, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
void draw_text(Function<void(IntRect const&, Utf8CodePointIterator&)>, IntRect const&, Utf8View const&, Font const&, TextAlignment = TextAlignment::TopLeft, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
void draw_text(Function<void(IntRect const&, Utf8CodePointIterator&)>, IntRect const&, Utf32View const&, Font const&, TextAlignment = TextAlignment::TopLeft, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
void draw_ui_text(Gfx::IntRect const&, StringView, Gfx::Font const&, TextAlignment, Gfx::Color);
void draw_glyph(IntPoint const&, u32, Color);
void draw_glyph(IntPoint const&, u32, Font const&, Color);
void draw_emoji(IntPoint const&, Gfx::Bitmap const&, Font const&);
void draw_glyph_or_emoji(IntPoint const&, u32, Font const&, Color);
void draw_glyph_or_emoji(IntPoint const&, Utf8CodePointIterator&, Font const&, Color);
void draw_circle_arc_intersecting(IntRect const&, IntPoint const&, int radius, Color, int thickness);
// Streamlined text drawing routine that does no wrapping/elision/alignment.
void draw_text_run(FloatPoint const& baseline_start, Utf8View const&, Font const&, Color);
enum class CornerOrientation {
TopLeft,
TopRight,
BottomRight,
BottomLeft
};
void fill_rounded_corner(IntRect const&, int radius, Color, CornerOrientation);
static void for_each_line_segment_on_bezier_curve(FloatPoint const& control_point, FloatPoint const& p1, FloatPoint const& p2, Function<void(FloatPoint const&, FloatPoint const&)>&);
static void for_each_line_segment_on_bezier_curve(FloatPoint const& control_point, FloatPoint const& p1, FloatPoint const& p2, Function<void(FloatPoint const&, FloatPoint const&)>&&);
static void for_each_line_segment_on_cubic_bezier_curve(FloatPoint const& control_point_0, FloatPoint const& control_point_1, FloatPoint const& p1, FloatPoint const& p2, Function<void(FloatPoint const&, FloatPoint const&)>&);
static void for_each_line_segment_on_cubic_bezier_curve(FloatPoint const& control_point_0, FloatPoint const& control_point_1, FloatPoint const& p1, FloatPoint const& p2, Function<void(FloatPoint const&, FloatPoint const&)>&&);
static void for_each_line_segment_on_elliptical_arc(FloatPoint const& p1, FloatPoint const& p2, FloatPoint const& center, FloatPoint const radii, float x_axis_rotation, float theta_1, float theta_delta, Function<void(FloatPoint const&, FloatPoint const&)>&);
static void for_each_line_segment_on_elliptical_arc(FloatPoint const& p1, FloatPoint const& p2, FloatPoint const& center, FloatPoint const radii, float x_axis_rotation, float theta_1, float theta_delta, Function<void(FloatPoint const&, FloatPoint const&)>&&);
void stroke_path(Path const&, Color, int thickness);
enum class WindingRule {
Nonzero,
EvenOdd,
};
void fill_path(Path const&, Color, WindingRule rule = WindingRule::Nonzero);
Font const& font() const
{
if (!state().font)
return FontDatabase::default_font();
return *state().font;
}
void set_font(Font const& font) { state().font = &font; }
enum class DrawOp {
Copy,
Xor,
Invert
};
void set_draw_op(DrawOp op) { state().draw_op = op; }
DrawOp draw_op() const { return state().draw_op; }
void add_clip_rect(IntRect const& rect);
void clear_clip_rect();
void translate(int dx, int dy) { translate({ dx, dy }); }
void translate(IntPoint const& delta) { state().translation.translate_by(delta); }
Gfx::Bitmap* target() { return m_target.ptr(); }
void save() { m_state_stack.append(m_state_stack.last()); }
void restore()
{
VERIFY(m_state_stack.size() > 1);
m_state_stack.take_last();
}
IntRect clip_rect() const { return state().clip_rect; }
int scale() const { return state().scale; }
protected:
IntPoint translation() const { return state().translation; }
IntRect to_physical(IntRect const& r) const { return r.translated(translation()) * scale(); }
IntPoint to_physical(IntPoint const& p) const { return p.translated(translation()) * scale(); }
void set_physical_pixel_with_draw_op(u32& pixel, Color const&);
void fill_physical_scanline_with_draw_op(int y, int x, int width, Color const& color);
void fill_rect_with_draw_op(IntRect const&, Color);
void blit_with_opacity(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect, float opacity, bool apply_alpha = true);
void draw_physical_pixel(IntPoint const&, Color, int thickness = 1);
struct State {
Font const* font;
IntPoint translation;
int scale = 1;
IntRect clip_rect;
DrawOp draw_op;
};
State& state() { return m_state_stack.last(); }
State const& state() const { return m_state_stack.last(); }
void fill_physical_rect(IntRect const&, Color);
IntRect m_clip_origin;
NonnullRefPtr<Gfx::Bitmap> m_target;
Vector<State, 4> m_state_stack;
private:
Vector<DirectionalRun> split_text_into_directional_runs(Utf8View const&, TextDirection initial_direction);
bool text_contains_bidirectional_text(Utf8View const&, TextDirection);
template<typename DrawGlyphFunction>
void do_draw_text(IntRect const&, Utf8View const& text, Font const&, TextAlignment, TextElision, TextWrapping, DrawGlyphFunction);
};
class PainterStateSaver {
public:
explicit PainterStateSaver(Painter&);
~PainterStateSaver();
private:
Painter& m_painter;
};
String parse_ampersand_string(StringView, Optional<size_t>* underline_offset = nullptr);
}
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