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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <AK/Forward.h>
#include <AK/NonnullRefPtr.h>
#include <AK/Vector.h>
#include <LibGfx/Color.h>
#include <LibGfx/Forward.h>
#include <LibGfx/Point.h>
#include <LibGfx/Rect.h>
#include <LibGfx/Size.h>
#include <LibGfx/TextAlignment.h>
#include <LibGfx/TextElision.h>
namespace Gfx {
class Painter {
public:
explicit Painter(Gfx::Bitmap&);
~Painter();
enum class LineStyle {
Solid,
Dotted,
Dashed,
};
void clear_rect(const IntRect&, Color);
void fill_rect(const IntRect&, Color);
void fill_rect_with_dither_pattern(const IntRect&, Color, Color);
void fill_rect_with_checkerboard(const IntRect&, const IntSize&, Color color_dark, Color color_light);
void fill_rect_with_gradient(Orientation, const IntRect&, Color gradient_start, Color gradient_end);
void fill_rect_with_gradient(const IntRect&, Color gradient_start, Color gradient_end);
void fill_ellipse(const IntRect&, Color);
void draw_rect(const IntRect&, Color, bool rough = false);
void draw_bitmap(const IntPoint&, const CharacterBitmap&, Color = Color());
void draw_bitmap(const IntPoint&, const GlyphBitmap&, Color = Color());
void draw_scaled_bitmap(const IntRect& dst_rect, const Gfx::Bitmap&, const IntRect& src_rect, float opacity = 1.0f);
void draw_triangle(const IntPoint&, const IntPoint&, const IntPoint&, Color);
void draw_ellipse_intersecting(const IntRect&, Color, int thickness = 1);
void set_pixel(const IntPoint&, Color);
void draw_line(const IntPoint&, const IntPoint&, Color, int thickness = 1, LineStyle style = LineStyle::Solid);
void draw_quadratic_bezier_curve(const IntPoint& control_point, const IntPoint&, const IntPoint&, Color, int thickness = 1, LineStyle style = LineStyle::Solid);
void draw_elliptical_arc(const IntPoint& p1, const IntPoint& p2, const IntPoint& center, const FloatPoint& radii, float x_axis_rotation, float theta_1, float theta_delta, Color, int thickness = 1, LineStyle style = LineStyle::Solid);
void blit(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect, float opacity = 1.0f);
void blit_dimmed(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect);
void blit_brightened(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect);
void blit_filtered(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect, Function<Color(Color)>);
void draw_tiled_bitmap(const IntRect& dst_rect, const Gfx::Bitmap&);
void blit_offset(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect, const IntPoint&);
void blit_scaled(const IntRect&, const Gfx::Bitmap&, const IntRect&, float, float);
void draw_text(const IntRect&, const StringView&, const Font&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None);
void draw_text(const IntRect&, const StringView&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None);
void draw_text(const IntRect&, const Utf32View&, const Font&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None);
void draw_text(const IntRect&, const Utf32View&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None);
void draw_glyph(const IntPoint&, u32, Color);
void draw_glyph(const IntPoint&, u32, const Font&, Color);
void draw_emoji(const IntPoint&, const Gfx::Bitmap&, const Font&);
void draw_glyph_or_emoji(const IntPoint&, u32 codepoint, const Font&, Color);
static void for_each_line_segment_on_bezier_curve(const FloatPoint& control_point, const FloatPoint& p1, const FloatPoint& p2, Function<void(const FloatPoint&, const FloatPoint&)>&);
static void for_each_line_segment_on_bezier_curve(const FloatPoint& control_point, const FloatPoint& p1, const FloatPoint& p2, Function<void(const FloatPoint&, const FloatPoint&)>&&);
static void for_each_line_segment_on_elliptical_arc(const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& center, const FloatPoint radii, float x_axis_rotation, float theta_1, float theta_delta, Function<void(const FloatPoint&, const FloatPoint&)>&);
static void for_each_line_segment_on_elliptical_arc(const FloatPoint& p1, const FloatPoint& p2, const FloatPoint& center, const FloatPoint radii, float x_axis_rotation, float theta_1, float theta_delta, Function<void(const FloatPoint&, const FloatPoint&)>&&);
void stroke_path(const Path&, Color, int thickness);
enum class WindingRule {
Nonzero,
EvenOdd,
};
void fill_path(Path&, Color, WindingRule rule = WindingRule::Nonzero);
const Font& font() const { return *state().font; }
void set_font(const Font& font) { state().font = &font; }
enum class DrawOp {
Copy,
Xor
};
void set_draw_op(DrawOp op) { state().draw_op = op; }
DrawOp draw_op() const { return state().draw_op; }
void add_clip_rect(const IntRect& rect);
void clear_clip_rect();
IntRect clip_rect() const { return state().clip_rect; }
void translate(int dx, int dy) { state().translation.move_by(dx, dy); }
void translate(const IntPoint& delta) { state().translation.move_by(delta); }
IntPoint translation() const { return state().translation; }
Gfx::Bitmap* target() { return m_target.ptr(); }
void save() { m_state_stack.append(m_state_stack.last()); }
void restore()
{
ASSERT(m_state_stack.size() > 1);
m_state_stack.take_last();
}
protected:
void set_pixel_with_draw_op(u32& pixel, const Color&);
void fill_rect_with_draw_op(const IntRect&, Color);
void blit_with_alpha(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect);
void blit_with_opacity(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect, float opacity);
void draw_pixel(const IntPoint&, Color, int thickness = 1);
void draw_text_line(const IntRect&, const Utf8View&, const Font&, TextAlignment, Color, TextElision);
void draw_text_line(const IntRect&, const Utf32View&, const Font&, TextAlignment, Color, TextElision);
struct State {
const Font* font;
IntPoint translation;
IntRect clip_rect;
DrawOp draw_op;
};
State& state() { return m_state_stack.last(); }
const State& state() const { return m_state_stack.last(); }
IntRect m_clip_origin;
NonnullRefPtr<Gfx::Bitmap> m_target;
Vector<State, 4> m_state_stack;
};
class PainterStateSaver {
public:
explicit PainterStateSaver(Painter&);
~PainterStateSaver();
private:
Painter& m_painter;
};
}
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