655d9d1462
This fixes a plethora of rounding problems on many websites. In the future, we may want to replace this with fixed-point arithmetic (bug #18566) for performance (and consistency with other engines), but in the meantime this makes the web look a bit better. :^) There's a lot more things that could be converted to doubles, which would reduce the amount of casting necessary in this patch. We can do that incrementally, however.
55 lines
1.4 KiB
C++
55 lines
1.4 KiB
C++
/*
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* Copyright (c) 2023, 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/URL.h>
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#include <AK/Variant.h>
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#include <LibWeb/CSS/Length.h>
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namespace Web::HTML {
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// https://html.spec.whatwg.org/multipage/images.html#image-source
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struct ImageSource {
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struct PixelDensityDescriptorValue {
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double value { 0 };
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};
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struct WidthDescriptorValue {
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CSSPixels value { 0 };
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};
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String url;
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Variant<Empty, PixelDensityDescriptorValue, WidthDescriptorValue> descriptor;
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};
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struct ImageSourceAndPixelDensity {
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ImageSource source;
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double pixel_density { 1.0f };
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};
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// https://html.spec.whatwg.org/multipage/images.html#source-set
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struct SourceSet {
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static SourceSet create(DOM::Document const&, String default_source, String srcset, String sizes);
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[[nodiscard]] bool is_empty() const;
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// https://html.spec.whatwg.org/multipage/images.html#select-an-image-source-from-a-source-set
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[[nodiscard]] ImageSourceAndPixelDensity select_an_image_source();
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// https://html.spec.whatwg.org/multipage/images.html#normalise-the-source-densities
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void normalize_source_densities();
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SourceSet();
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Vector<ImageSource> m_sources;
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CSS::Length m_source_size;
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};
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SourceSet parse_a_srcset_attribute(StringView);
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CSS::Length parse_a_sizes_attribute(DOM::Document const&, StringView);
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}
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