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a79ec6c228
We also resolve font-relative lengths based on the canvas' font, see the AD-HOC comment in AbstractCanvasMixin.cpp
113 lines
4.3 KiB
C++
113 lines
4.3 KiB
C++
/*
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* Copyright (c) 2020-2022, Andreas Kling <andreas@ladybird.org>
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* Copyright (c) 2021-2022, Linus Groh <linusg@serenityos.org>
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* Copyright (c) 2022, Sam Atkins <atkinssj@serenityos.org>
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* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
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* Copyright (c) 2025, Callum Law <callumlaw1709@outlook.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "CanvasFillStrokeStyles.h"
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#include <AK/String.h>
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#include <LibWeb/CSS/Parser/Parser.h>
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#include <LibWeb/CSS/PropertyID.h>
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/HTML/CanvasGradient.h>
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#include <LibWeb/HTML/CanvasPattern.h>
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#include <LibWeb/HTML/CanvasRenderingContext2D.h>
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#include <LibWeb/HTML/HTMLCanvasElement.h>
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#include <LibWeb/HTML/OffscreenCanvasRenderingContext2D.h>
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namespace Web::HTML {
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void CanvasFillStrokeStyles::set_fill_style(FillOrStrokeStyleVariant style)
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{
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// https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-fillstyle
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style.visit(
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// 1. If the given value is a string, then:
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[&](String const& string) {
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// 1. Let context be this's canvas attribute's value, if that is an element; otherwise null.
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// 2. Let parsedValue be the result of parsing the given value with context if non-null.
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auto parsed_value = parse_a_css_color_value(string);
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// 3. If parsedValue is failure, then return.
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if (!parsed_value.has_value())
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return;
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// 4. Set this's fill style to parsedValue.
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drawing_state().fill_style = parsed_value.value();
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// 5. Return.
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return;
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},
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[&](auto fill_or_stroke_style) {
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// FIXME: 2. If the given value is a CanvasPattern object that is marked as not origin-clean, then set this's origin-clean flag to false.
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// 3. Set this's fill style to the given value.
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drawing_state().fill_style = GC::Ref { *fill_or_stroke_style };
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});
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}
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CanvasFillStrokeStyles::FillOrStrokeStyleVariant CanvasFillStrokeStyles::fill_style() const
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{
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return drawing_state().fill_style.to_js_fill_or_stroke_style();
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}
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void CanvasFillStrokeStyles::set_stroke_style(FillOrStrokeStyleVariant style)
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{
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// https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-strokestyle
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style.visit(
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// 1. If the given value is a string, then:
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[&](String const& string) {
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// 1. Let context be this's canvas attribute's value, if that is an element; otherwise null.
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// 2. Let parsedValue be the result of parsing the given value with context if non-null.
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auto parsed_value = parse_a_css_color_value(string);
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// 3. If parsedValue is failure, then return.
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if (!parsed_value.has_value())
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return;
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// 4. Set this's stroke style to parsedValue.
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drawing_state().stroke_style = parsed_value.value();
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// 5. Return.
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return;
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},
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[&](auto fill_or_stroke_style) {
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// FIXME: 2. If the given value is a CanvasPattern object that is marked as not origin-clean, then set this's origin-clean flag to false.
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// 3. Set this's stroke style to the given value.
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drawing_state().stroke_style = GC::Ref { *fill_or_stroke_style };
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});
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}
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CanvasFillStrokeStyles::FillOrStrokeStyleVariant CanvasFillStrokeStyles::stroke_style() const
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{
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return drawing_state().stroke_style.to_js_fill_or_stroke_style();
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}
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WebIDL::ExceptionOr<GC::Ref<CanvasGradient>> CanvasFillStrokeStyles::create_radial_gradient(double x0, double y0, double r0, double x1, double y1, double r1)
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{
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return CanvasGradient::create_radial(my_realm(), x0, y0, r0, x1, y1, r1);
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}
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GC::Ref<CanvasGradient> CanvasFillStrokeStyles::create_linear_gradient(double x0, double y0, double x1, double y1)
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{
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return CanvasGradient::create_linear(my_realm(), x0, y0, x1, y1).release_value_but_fixme_should_propagate_errors();
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}
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GC::Ref<CanvasGradient> CanvasFillStrokeStyles::create_conic_gradient(double start_angle, double x, double y)
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{
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return CanvasGradient::create_conic(my_realm(), start_angle, x, y).release_value_but_fixme_should_propagate_errors();
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}
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WebIDL::ExceptionOr<GC::Ptr<CanvasPattern>> CanvasFillStrokeStyles::create_pattern(CanvasImageSource const& image, StringView repetition)
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{
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return CanvasPattern::create(my_realm(), image, repetition);
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}
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}
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