mirror of
https://github.com/RGBCube/serenity
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3d7838c5fb
If you wanted to upscale an image, you had two options: - use Nearest Neighbor: it's probably a good choice. The image stays sharp.. unless you aren't using integer scales. - use Bilinear blending, but this on the other hand, doesn't handle upscaling well. It just blurs everything. But what if we could take the best of both of them and make the image sharp on integers and just blur it a little when needed? Well, there's Smooth Pixels! This mode is similar to the Bilinear Blend, with the main difference is that the blend ratio is multiplied by the current scale, so the blur on corners can be only 1px wide. From my testing this mode doesn't handles downscaling as good as the Bilinear blending though.
200 lines
11 KiB
C++
200 lines
11 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/Utf8View.h>
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#include <AK/Vector.h>
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#include <LibGfx/Color.h>
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#include <LibGfx/Font/FontDatabase.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/TextDirection.h>
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#include <LibGfx/TextElision.h>
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#include <LibGfx/TextWrapping.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() = default;
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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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enum class ScalingMode {
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NearestNeighbor,
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SmoothPixels,
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BilinearBlend,
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};
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void clear_rect(IntRect const&, Color);
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void fill_rect(IntRect const&, Color);
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void fill_rect_with_dither_pattern(IntRect const&, Color, Color);
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void fill_rect_with_checkerboard(IntRect const&, IntSize const&, Color color_dark, Color color_light);
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void fill_rect_with_gradient(Orientation, IntRect const&, Color gradient_start, Color gradient_end);
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void fill_rect_with_gradient(IntRect const&, Color gradient_start, Color gradient_end);
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void fill_rect_with_rounded_corners(IntRect const&, Color, int radius);
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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);
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void fill_ellipse(IntRect const&, Color);
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void draw_rect(IntRect const&, Color, bool rough = false);
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void draw_rect_with_thickness(IntRect const&, Color, int thickness);
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void draw_focus_rect(IntRect const&, Color);
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void draw_bitmap(IntPoint const&, CharacterBitmap const&, Color = Color());
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void draw_bitmap(IntPoint const&, GlyphBitmap const&, Color = Color());
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void draw_scaled_bitmap(IntRect const& dst_rect, Gfx::Bitmap const&, IntRect const& src_rect, float opacity = 1.0f, ScalingMode = ScalingMode::NearestNeighbor);
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void draw_scaled_bitmap(IntRect const& dst_rect, Gfx::Bitmap const&, FloatRect const& src_rect, float opacity = 1.0f, ScalingMode = ScalingMode::NearestNeighbor);
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void draw_triangle(IntPoint const&, IntPoint const&, IntPoint const&, Color);
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void draw_ellipse_intersecting(IntRect const&, Color, int thickness = 1);
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void set_pixel(IntPoint const&, Color, bool blend = false);
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void set_pixel(int x, int y, Color color, bool blend = false) { set_pixel({ x, y }, color, blend); }
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Optional<Color> get_pixel(IntPoint const&);
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void draw_line(IntPoint const&, IntPoint const&, Color, int thickness = 1, LineStyle style = LineStyle::Solid, Color alternate_color = Color::Transparent);
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void draw_triangle_wave(IntPoint const&, IntPoint const&, Color color, int amplitude, int thickness = 1);
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void draw_quadratic_bezier_curve(IntPoint const& control_point, IntPoint const&, IntPoint const&, Color, int thickness = 1, LineStyle style = LineStyle::Solid);
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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);
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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);
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void blit(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect, float opacity = 1.0f, bool apply_alpha = true);
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void blit_dimmed(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect);
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void blit_brightened(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect);
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void blit_filtered(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect, Function<Color(Color)>);
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void draw_tiled_bitmap(IntRect const& dst_rect, Gfx::Bitmap const&);
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void blit_offset(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect, IntPoint const&);
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void blit_disabled(IntPoint const&, Gfx::Bitmap const&, IntRect const&, Palette const&);
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void blit_tiled(IntRect const&, Gfx::Bitmap const&, IntRect const& src_rect);
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void draw_text(IntRect const&, StringView, Font const&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
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void draw_text(IntRect const&, StringView, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
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void draw_text(IntRect const&, Utf32View const&, Font const&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
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void draw_text(IntRect const&, Utf32View const&, TextAlignment = TextAlignment::TopLeft, Color = Color::Black, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
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void draw_text(Function<void(IntRect const&, Utf8CodePointIterator&)>, IntRect const&, StringView, Font const&, TextAlignment = TextAlignment::TopLeft, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
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void draw_text(Function<void(IntRect const&, Utf8CodePointIterator&)>, IntRect const&, Utf8View const&, Font const&, TextAlignment = TextAlignment::TopLeft, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
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void draw_text(Function<void(IntRect const&, Utf8CodePointIterator&)>, IntRect const&, Utf32View const&, Font const&, TextAlignment = TextAlignment::TopLeft, TextElision = TextElision::None, TextWrapping = TextWrapping::DontWrap);
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void draw_ui_text(Gfx::IntRect const&, StringView, Gfx::Font const&, TextAlignment, Gfx::Color);
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void draw_glyph(IntPoint const&, u32, Color);
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void draw_glyph(IntPoint const&, u32, Font const&, Color);
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void draw_emoji(IntPoint const&, Gfx::Bitmap const&, Font const&);
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void draw_glyph_or_emoji(IntPoint const&, u32, Font const&, Color);
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void draw_glyph_or_emoji(IntPoint const&, Utf8CodePointIterator&, Font const&, Color);
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void draw_circle_arc_intersecting(IntRect const&, IntPoint const&, int radius, Color, int thickness);
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// Streamlined text drawing routine that does no wrapping/elision/alignment.
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void draw_text_run(FloatPoint const& baseline_start, Utf8View const&, Font const&, Color);
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enum class CornerOrientation {
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TopLeft,
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TopRight,
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BottomRight,
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BottomLeft
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};
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void fill_rounded_corner(IntRect const&, int radius, Color, CornerOrientation);
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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&)>&);
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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&)>&&);
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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&)>&);
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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&)>&&);
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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&)>&);
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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&)>&&);
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void stroke_path(Path const&, 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 const&, Color, WindingRule rule = WindingRule::Nonzero);
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Font const& font() const
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{
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if (!state().font)
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return FontDatabase::default_font();
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return *state().font;
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}
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void set_font(Font const& 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(IntRect const& rect);
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void clear_clip_rect();
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void translate(int dx, int dy) { translate({ dx, dy }); }
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void translate(IntPoint const& delta) { state().translation.translate_by(delta); }
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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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int scale() const { return state().scale; }
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protected:
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IntPoint translation() const { return state().translation; }
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IntRect to_physical(IntRect const& r) const { return r.translated(translation()) * scale(); }
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IntPoint to_physical(IntPoint const& p) const { return p.translated(translation()) * scale(); }
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void set_physical_pixel_with_draw_op(u32& pixel, Color const&);
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void fill_physical_scanline_with_draw_op(int y, int x, int width, Color const& color);
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void fill_rect_with_draw_op(IntRect const&, Color);
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void blit_with_opacity(IntPoint const&, Gfx::Bitmap const&, IntRect const& src_rect, float opacity, bool apply_alpha = true);
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void draw_physical_pixel(IntPoint const&, Color, int thickness = 1);
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struct State {
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Font const* font;
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IntPoint translation;
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int scale = 1;
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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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State const& state() const { return m_state_stack.last(); }
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void fill_physical_rect(IntRect const&, Color);
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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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private:
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Vector<DirectionalRun> split_text_into_directional_runs(Utf8View const&, TextDirection initial_direction);
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bool text_contains_bidirectional_text(Utf8View const&, TextDirection);
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template<typename DrawGlyphFunction>
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void do_draw_text(IntRect const&, Utf8View const& text, Font const&, TextAlignment, TextElision, TextWrapping, DrawGlyphFunction);
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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(StringView, Optional<size_t>* underline_offset = nullptr);
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}
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