mirror of
https://github.com/RGBCube/serenity
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ff76a5b8d2
This allows the painter to be scaled separately in both directions, and not just in integer intervals. This is crucial for proper SVG viewBox support. Most bitmap-related things verify the scale to be one as of now.
187 lines
9.1 KiB
C++
187 lines
9.1 KiB
C++
/*
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* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Forward.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/Vector.h>
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#include <LibGfx/Color.h>
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#include <LibGfx/Forward.h>
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#include <LibGfx/Point.h>
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#include <LibGfx/Rect.h>
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#include <LibGfx/Size.h>
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#include <LibGfx/TextAlignment.h>
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#include <LibGfx/TextElision.h>
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namespace Gfx {
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class Painter {
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public:
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explicit Painter(Gfx::Bitmap&);
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~Painter();
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enum class LineStyle {
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Solid,
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Dotted,
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Dashed,
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};
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void clear_rect(const IntRect&, Color);
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void fill_rect(const IntRect&, Color);
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void fill_rect_with_dither_pattern(const IntRect&, Color, Color);
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void fill_rect_with_checkerboard(const IntRect&, const IntSize&, Color color_dark, Color color_light);
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void fill_rect_with_gradient(Orientation, const IntRect&, Color gradient_start, Color gradient_end);
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void fill_rect_with_gradient(const IntRect&, Color gradient_start, Color gradient_end);
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void fill_ellipse(const IntRect&, Color);
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void draw_rect(const IntRect&, Color, bool without_corners = false);
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void draw_focus_rect(const IntRect&, Color);
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void draw_bitmap(const IntPoint&, const CharacterBitmap&, Color = Color());
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void draw_bitmap(const IntPoint&, const GlyphBitmap&, Color = Color());
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void draw_scaled_bitmap(const IntRect& dst_rect, const Gfx::Bitmap&, const IntRect& src_rect, float opacity = 1.0f);
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void draw_scaled_bitmap(const IntRect& dst_rect, const Gfx::Bitmap&, const FloatRect& src_rect, float opacity = 1.0f);
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void draw_triangle(const IntPoint&, const IntPoint&, const IntPoint&, Color);
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void draw_ellipse_intersecting(const IntRect&, Color, int thickness = 1);
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void set_pixel(const IntPoint&, Color);
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void set_pixel(int x, int y, Color color) { set_pixel({ x, y }, color); }
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void draw_line(const IntPoint&, const IntPoint&, Color, int thickness = 1, LineStyle style = LineStyle::Solid);
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void draw_quadratic_bezier_curve(const IntPoint& control_point, const IntPoint&, const IntPoint&, Color, int thickness = 1, LineStyle style = LineStyle::Solid);
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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);
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void blit(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect, float opacity = 1.0f, bool apply_alpha = true);
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void blit_dimmed(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect);
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void blit_brightened(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect);
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void blit_filtered(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect, Function<Color(Color)>);
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void draw_tiled_bitmap(const IntRect& dst_rect, const Gfx::Bitmap&);
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void blit_offset(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect, const IntPoint&);
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void blit_disabled(const IntPoint&, const Gfx::Bitmap&, const IntRect&, const Palette&);
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void blit_tiled(const IntRect&, const Gfx::Bitmap&, const IntRect& src_rect);
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void draw_text(const IntRect&, const StringView&, const Font&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None);
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void draw_text(const IntRect&, const StringView&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None);
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void draw_text(const IntRect&, const Utf32View&, const Font&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None);
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void draw_text(const IntRect&, const Utf32View&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None);
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void draw_text(Function<void(const IntRect&, u32)>, const IntRect&, const StringView&, const Font&, TextAlignment = TextAlignment::TopLeft, TextElision = TextElision::None);
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void draw_text(Function<void(const IntRect&, u32)>, const IntRect&, const Utf8View&, const Font&, TextAlignment = TextAlignment::TopLeft, TextElision = TextElision::None);
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void draw_text(Function<void(const IntRect&, u32)>, const IntRect&, const Utf32View&, const Font&, TextAlignment = TextAlignment::TopLeft, TextElision = TextElision::None);
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void draw_ui_text(const Gfx::IntRect&, const StringView&, const Gfx::Font&, TextAlignment, Gfx::Color);
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void draw_glyph(const IntPoint&, u32, Color);
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void draw_glyph(const IntPoint&, u32, const Font&, Color);
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void draw_emoji(const IntPoint&, const Gfx::Bitmap&, const Font&);
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void draw_glyph_or_emoji(const IntPoint&, u32 code_point, const Font&, Color);
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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&)>&);
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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&)>&&);
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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&)>&);
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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&)>&&);
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void stroke_path(const Path&, Color, int thickness);
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enum class WindingRule {
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Nonzero,
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EvenOdd,
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};
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void fill_path(Path&, Color, WindingRule rule = WindingRule::Nonzero);
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const Font& font() const { return *state().font; }
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void set_font(const Font& font) { state().font = &font; }
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enum class DrawOp {
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Copy,
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Xor,
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Invert
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};
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void set_draw_op(DrawOp op) { state().draw_op = op; }
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DrawOp draw_op() const { return state().draw_op; }
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void add_clip_rect(const IntRect& rect);
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void clear_clip_rect();
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IntPoint translation() const { return transform().translation().to_type<int>(); }
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template<typename T>
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void translate(T dx, T dy) { transform().translate(static_cast<float>(dx), static_cast<float>(dy)); }
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template<typename T>
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void translate(const Point<T>& delta) { transform().translate(delta.template to_type<float>()); }
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FloatPoint float_scale() const { return transform().scale(); }
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int scale() const;
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template<typename T>
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void scale(T dx, T dy) { transform().scale(static_cast<float>(dx), static_cast<float>(dy)); }
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template<typename T>
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void scale(const Point<T>& delta) { transform().scale(delta.template to_type<float>()); }
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Gfx::Bitmap* target() { return m_target.ptr(); }
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void save() { m_state_stack.append(m_state_stack.last()); }
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void restore()
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{
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VERIFY(m_state_stack.size() > 1);
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m_state_stack.take_last();
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}
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IntRect clip_rect() const { return state().clip_rect; }
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protected:
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AffineTransform& transform() { return state().transform; }
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const AffineTransform& transform() const { return state().transform; }
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IntSize scaled(const IntSize& size) const
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{
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return IntSize {
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static_cast<float>(size.width()) * float_scale().x(),
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static_cast<float>(size.height()) * float_scale().y(),
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};
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}
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IntRect scaled(const IntRect& rect) const
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{
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return IntRect {
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static_cast<float>(rect.x()) * float_scale().x(),
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static_cast<float>(rect.y()) * float_scale().y(),
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static_cast<float>(rect.width()) * float_scale().x(),
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static_cast<float>(rect.height()) * float_scale().y(),
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};
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}
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IntRect to_physical(const IntRect& rect) { return rect.transformed(transform()).intersected(clip_rect()); }
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IntPoint to_physical(const IntPoint& point) { return point.transformed(transform()).constrained(clip_rect()); }
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void set_physical_pixel_with_draw_op(u32& pixel, const Color&);
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void fill_physical_scanline_with_draw_op(int y, int x, int width, const Color& color);
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void fill_rect_with_draw_op(const IntRect&, Color);
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void blit_with_opacity(const IntPoint&, const Gfx::Bitmap&, const IntRect& src_rect, float opacity, bool apply_alpha = true);
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void draw_physical_pixel(const IntPoint&, Color, IntSize thickness = { 1, 1 });
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void fill_physical_rect(const IntRect&, Color);
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ALWAYS_INLINE bool has_integer_scale() const { return float_scale().x() == float_scale().y() && float_scale().x() == floorf(float_scale().x()); }
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struct State {
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const Font* font;
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AffineTransform transform;
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IntRect clip_rect;
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DrawOp draw_op;
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};
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State& state() { return m_state_stack.last(); }
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const State& state() const { return m_state_stack.last(); }
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IntRect m_clip_origin;
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NonnullRefPtr<Gfx::Bitmap> m_target;
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Vector<State, 4> m_state_stack;
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};
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class PainterStateSaver {
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public:
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explicit PainterStateSaver(Painter&);
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~PainterStateSaver();
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private:
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Painter& m_painter;
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};
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String parse_ampersand_string(const StringView&, Optional<size_t>* underline_offset = nullptr);
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}
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