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77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
/*
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* Copyright (c) 2023, MacDue <macdue@dueutil.tech>
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* Copyright (c) 2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGfx/Bitmap.h>
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#include <LibWeb/Bindings/CanvasPatternPrototype.h>
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#include <LibWeb/Bindings/Intrinsics.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/SVG/SVGImageElement.h>
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namespace Web::HTML {
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GC_DEFINE_ALLOCATOR(CanvasPattern);
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CanvasPattern::CanvasPattern(JS::Realm& realm, CanvasPatternPaintStyle& pattern)
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: PlatformObject(realm)
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, m_pattern(pattern)
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{
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}
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CanvasPattern::~CanvasPattern() = default;
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// https://html.spec.whatwg.org/multipage/canvas.html#dom-context-2d-createpattern
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WebIDL::ExceptionOr<GC::Ptr<CanvasPattern>> CanvasPattern::create(JS::Realm& realm, CanvasImageSource const& image, StringView repetition)
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{
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auto parse_repetition = [&](auto repetition) -> Optional<CanvasPatternPaintStyle::Repetition> {
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if (repetition == "repeat"sv)
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return CanvasPatternPaintStyle::Repetition::Repeat;
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if (repetition == "repeat-x"sv)
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return CanvasPatternPaintStyle::Repetition::RepeatX;
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if (repetition == "repeat-y"sv)
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return CanvasPatternPaintStyle::Repetition::RepeatY;
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if (repetition == "no-repeat"sv)
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return CanvasPatternPaintStyle::Repetition::NoRepeat;
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return {};
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};
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// 1. Let usability be the result of checking the usability of image.
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auto usability = TRY(check_usability_of_image(image));
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// 2. If usability is bad, then return null.
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if (usability == CanvasImageSourceUsability::Bad)
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return GC::Ptr<CanvasPattern> {};
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// 3. Assert: usability is good.
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VERIFY(usability == CanvasImageSourceUsability::Good);
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// 4. If repetition is the empty string, then set it to "repeat".
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if (repetition.is_empty())
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repetition = "repeat"sv;
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// 5. If repetition is not identical to one of "repeat", "repeat-x", "repeat-y", or "no-repeat",
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// then throw a "SyntaxError" DOMException.
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auto repetition_value = parse_repetition(repetition);
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if (!repetition_value.has_value())
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return WebIDL::SyntaxError::create(realm, "Repetition value is not valid"_string);
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// 6. Let pattern be a new CanvasPattern object with the image image and the repetition behavior given by repetition.
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auto pattern = TRY_OR_THROW_OOM(realm.vm(), CanvasPatternPaintStyle::create(image, *repetition_value));
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// FIXME: 7. If image is not origin-clean, then mark pattern as not origin-clean.
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// 8. Return pattern.
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return realm.create<CanvasPattern>(realm, *pattern);
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}
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void CanvasPattern::initialize(JS::Realm& realm)
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{
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WEB_SET_PROTOTYPE_FOR_INTERFACE(CanvasPattern);
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Base::initialize(realm);
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}
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}
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