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@@ -188,11 +188,24 @@ void SVGFormattingContext::run(Box const& box, LayoutMode layout_mode, Available
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box.for_each_in_subtree([&](Node const& descendant) {
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if (is<SVGGraphicsBox>(descendant)) {
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auto const& graphics_box = static_cast<SVGGraphicsBox const&>(descendant);
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- auto& graphics_box_state = m_state.get_mutable(graphics_box);
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auto& dom_node = const_cast<SVGGraphicsBox&>(graphics_box).dom_node();
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+ auto viewbox = dom_node.view_box();
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+
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+ // https://svgwg.org/svg2-draft/coords.html#ViewBoxAttribute
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+ if (viewbox.has_value()) {
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+ if (viewbox->width < 0 || viewbox->height < 0) {
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+ // A negative value for <width> or <height> is an error and invalidates the ‘viewBox’ attribute.
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+ viewbox = {};
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+ } else if (viewbox->width == 0 || viewbox->height == 0) {
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+ // A value of zero disables rendering of the element.
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+ return IterationDecision::Continue;
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+ }
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+ }
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+ auto& graphics_box_state = m_state.get_mutable(graphics_box);
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auto svg_transform = dom_node.get_transform();
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- Gfx::AffineTransform viewbox_transform = compute_viewbox_transform(dom_node.view_box());
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+
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+ Gfx::AffineTransform viewbox_transform = compute_viewbox_transform(viewbox);
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graphics_box_state.set_computed_svg_transforms(Painting::SVGGraphicsPaintable::ComputedTransforms(viewbox_transform, svg_transform));
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auto to_css_pixels_transform = Gfx::AffineTransform {}.multiply(viewbox_transform).multiply(svg_transform);
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MacDue