layout: Improve sizing for inline SVG (#38603)

The metadata provided by usvg has unreliable sizes. Ignore it, and rely
on the `width`, `height` and `viewBox` attributes instead.

Note that inline SVG with a natural aspect ratio but no natural sizes
should stretch to the containing block. This is left for a follow-up.

Bumps Stylo to https://github.com/servo/stylo/pull/229

Testing: Improves several WPT.

---------

Signed-off-by: Oriol Brufau <obrufau@igalia.com>
Signed-off-by: Mukilan Thiyagarajan <mukilan@igalia.com>
Co-authored-by: Mukilan Thiyagarajan <mukilan@igalia.com>
This commit is contained in:
Oriol Brufau 2025-08-12 05:45:15 -07:00 committed by GitHub
parent 319f4f0e38
commit 141413d52e
No known key found for this signature in database
GPG key ID: B5690EEEBB952194
81 changed files with 156 additions and 260 deletions

24
Cargo.lock generated
View file

@ -7328,7 +7328,7 @@ dependencies = [
[[package]]
name = "selectors"
version = "0.31.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
dependencies = [
"bitflags 2.9.1",
"cssparser",
@ -7634,7 +7634,7 @@ dependencies = [
[[package]]
name = "servo_arc"
version = "0.4.1"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
dependencies = [
"serde",
"stable_deref_trait",
@ -8108,7 +8108,7 @@ dependencies = [
[[package]]
name = "stylo"
version = "0.6.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
dependencies = [
"app_units",
"arrayvec",
@ -8165,7 +8165,7 @@ dependencies = [
[[package]]
name = "stylo_atoms"
version = "0.6.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
dependencies = [
"string_cache",
"string_cache_codegen",
@ -8174,12 +8174,12 @@ dependencies = [
[[package]]
name = "stylo_config"
version = "0.6.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
[[package]]
name = "stylo_derive"
version = "0.6.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
dependencies = [
"darling",
"proc-macro2",
@ -8191,7 +8191,7 @@ dependencies = [
[[package]]
name = "stylo_dom"
version = "0.6.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
dependencies = [
"bitflags 2.9.1",
"stylo_malloc_size_of",
@ -8200,7 +8200,7 @@ dependencies = [
[[package]]
name = "stylo_malloc_size_of"
version = "0.6.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
dependencies = [
"app_units",
"cssparser",
@ -8217,12 +8217,12 @@ dependencies = [
[[package]]
name = "stylo_static_prefs"
version = "0.6.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
[[package]]
name = "stylo_traits"
version = "0.6.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
dependencies = [
"app_units",
"bitflags 2.9.1",
@ -8637,7 +8637,7 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
[[package]]
name = "to_shmem"
version = "0.2.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
dependencies = [
"cssparser",
"servo_arc",
@ -8650,7 +8650,7 @@ dependencies = [
[[package]]
name = "to_shmem_derive"
version = "0.1.0"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#092e34b20bd666da62b7dfc1da5c5e0b64d3c960"
source = "git+https://github.com/servo/stylo?branch=2025-08-01#d2519c05c9d7db31c91552d3337578270645d797"
dependencies = [
"darling",
"proc-macro2",

View file

@ -2,7 +2,7 @@
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use app_units::Au;
use app_units::{Au, MAX_AU};
use base::id::{BrowsingContextId, PipelineId};
use data_url::DataUrl;
use embedder_traits::ViewportDetails;
@ -86,6 +86,16 @@ impl NaturalSizes {
}
}
pub(crate) fn from_natural_size_in_dots(natural_size_in_dots: PhysicalSize<f64>) -> Self {
// FIXME: should 'image-resolution' (when implemented) be used *instead* of
// `script::dom::htmlimageelement::ImageRequest::current_pixel_density`?
// https://drafts.csswg.org/css-images-4/#the-image-resolution
let dppx = 1.0;
let width = natural_size_in_dots.width as f32 / dppx;
let height = natural_size_in_dots.height as f32 / dppx;
Self::from_width_and_height(width, height)
}
pub(crate) fn empty() -> Self {
Self {
width: None,
@ -117,7 +127,7 @@ pub(crate) enum ReplacedContentKind {
IFrame(IFrameInfo),
Canvas(CanvasInfo),
Video(Option<VideoInfo>),
SVGElement(VectorImage),
SVGElement(Option<VectorImage>),
}
impl ReplacedContents {
@ -132,16 +142,16 @@ impl ReplacedContents {
}
}
let (kind, natural_size_in_dots) = {
let (kind, natural_size) = {
if let Some((image, natural_size_in_dots)) = element.as_image() {
(
ReplacedContentKind::Image(image),
Some(natural_size_in_dots),
NaturalSizes::from_natural_size_in_dots(natural_size_in_dots),
)
} else if let Some((canvas_info, natural_size_in_dots)) = element.as_canvas() {
(
ReplacedContentKind::Canvas(canvas_info),
Some(natural_size_in_dots),
NaturalSizes::from_natural_size_in_dots(natural_size_in_dots),
)
} else if let Some((pipeline_id, browsing_context_id)) = element.as_iframe() {
(
@ -149,12 +159,13 @@ impl ReplacedContents {
pipeline_id,
browsing_context_id,
}),
None,
NaturalSizes::empty(),
)
} else if let Some((image_key, natural_size_in_dots)) = element.as_video() {
(
ReplacedContentKind::Video(image_key.map(|key| VideoInfo { image_key: key })),
natural_size_in_dots,
natural_size_in_dots
.map_or_else(NaturalSizes::empty, NaturalSizes::from_natural_size_in_dots),
)
} else if let Some(svg_data) = element.as_svg() {
let svg_source = match svg_data.source {
@ -176,19 +187,18 @@ impl ReplacedContents {
let result = context
.image_resolver
.get_cached_image_for_url(element.opaque(), svg_source, UsePlaceholder::No)
.ok()?;
.ok();
let Image::Vector(vector_image) = result else {
unreachable!("SVG element can't contain a raster image.")
let vector_image = result.map(|result| match result {
Image::Vector(vector_image) => vector_image,
_ => unreachable!("SVG element can't contain a raster image."),
});
let natural_size = NaturalSizes {
width: svg_data.width.map(Au::from_px),
height: svg_data.height.map(Au::from_px),
ratio: svg_data.ratio,
};
let physical_size = PhysicalSize::new(
vector_image.metadata.width as f64,
vector_image.metadata.height as f64,
);
(
ReplacedContentKind::SVGElement(vector_image),
Some(physical_size),
)
(ReplacedContentKind::SVGElement(vector_image), natural_size)
} else {
return None;
}
@ -200,18 +210,6 @@ impl ReplacedContents {
.handle_animated_image(element.opaque(), image.clone());
}
let natural_size = if let Some(naturalc_size_in_dots) = natural_size_in_dots {
// FIXME: should 'image-resolution' (when implemented) be used *instead* of
// `script::dom::htmlimageelement::ImageRequest::current_pixel_density`?
// https://drafts.csswg.org/css-images-4/#the-image-resolution
let dppx = 1.0;
let width = (naturalc_size_in_dots.width as CSSFloat) / dppx;
let height = (naturalc_size_in_dots.height as CSSFloat) / dppx;
NaturalSizes::from_width_and_height(width, height)
} else {
NaturalSizes::empty()
};
let base_fragment_info = BaseFragmentInfo::new_for_node(element.opaque());
Some(Self {
kind,
@ -427,14 +425,32 @@ impl ReplacedContents {
}))]
},
ReplacedContentKind::SVGElement(vector_image) => {
let Some(vector_image) = vector_image else {
return vec![];
};
let scale = layout_context.style_context.device_pixel_ratio();
let width = object_fit_size.width.scale_by(scale.0).to_px();
let height = object_fit_size.height.scale_by(scale.0).to_px();
let size = Size2D::new(width, height);
// TODO: This is incorrect if the SVG has a viewBox.
let size = PhysicalSize::new(
vector_image
.metadata
.width
.try_into()
.map_or(MAX_AU, Au::from_px),
vector_image
.metadata
.height
.try_into()
.map_or(MAX_AU, Au::from_px),
);
let rect = PhysicalRect::from_size(size);
let raster_size = Size2D::new(
size.width.scale_by(scale.0).to_px(),
size.height.scale_by(scale.0).to_px(),
);
let tag = self.base_fragment_info.tag.unwrap();
layout_context
.image_resolver
.rasterize_vector_image(vector_image.id, size, tag.node)
.rasterize_vector_image(vector_image.id, raster_size, tag.node)
.and_then(|image| image.id)
.map(|image_key| {
Fragment::Image(ArcRefCell::new(ImageFragment {

View file

@ -6,18 +6,21 @@ use std::cell::RefCell;
use base64::Engine as _;
use dom_struct::dom_struct;
use html5ever::{LocalName, Prefix};
use html5ever::{LocalName, Prefix, local_name, ns};
use js::rust::HandleObject;
use layout_api::SVGElementData;
use servo_url::ServoUrl;
use style::attr::{AttrValue, parse_integer, parse_unsigned_integer};
use style::str::char_is_whitespace;
use xml5ever::serialize::TraversalScope;
use crate::dom::attr::Attr;
use crate::dom::bindings::inheritance::Castable;
use crate::dom::bindings::root::{DomRoot, LayoutDom};
use crate::dom::bindings::str::DOMString;
use crate::dom::document::Document;
use crate::dom::element::AttributeMutation;
use crate::dom::node::Node;
use crate::dom::element::{AttributeMutation, Element, LayoutElementHelpers};
use crate::dom::node::{Node, NodeDamage};
use crate::dom::svggraphicselement::SVGGraphicsElement;
use crate::dom::virtualmethods::VirtualMethods;
use crate::script_runtime::CanGc;
@ -80,6 +83,7 @@ impl SVGSVGElement {
fn invalidate_cached_serialized_subtree(&self) {
*self.cached_serialized_data_url.borrow_mut() = None;
self.upcast::<Node>().dirty(NodeDamage::Other);
}
}
@ -87,14 +91,50 @@ pub(crate) trait LayoutSVGSVGElementHelpers {
fn data(self) -> SVGElementData;
}
fn ratio_from_view_box(view_box: &AttrValue) -> Option<f32> {
let mut iter = view_box.chars();
let _min_x = parse_integer(&mut iter).ok()?;
let _min_y = parse_integer(&mut iter).ok()?;
let width = parse_unsigned_integer(&mut iter).ok()?;
if width == 0 {
return None;
}
let height = parse_unsigned_integer(&mut iter).ok()?;
if height == 0 {
return None;
}
let mut iter = iter.skip_while(|c| char_is_whitespace(*c));
iter.next().is_none().then(|| width as f32 / height as f32)
}
impl LayoutSVGSVGElementHelpers for LayoutDom<'_, SVGSVGElement> {
fn data(self) -> SVGElementData {
let element = self.upcast::<Element>();
let get_size = |attr| {
element
.get_attr_for_layout(&ns!(), &attr)
.map(|val| val.as_int())
.filter(|val| *val >= 0)
};
let width = get_size(local_name!("width"));
let height = get_size(local_name!("height"));
let ratio = match (width, height) {
(Some(width), Some(height)) if width != 0 && height != 0 => {
Some(width as f32 / height as f32)
},
_ => element
.get_attr_for_layout(&ns!(), &local_name!("viewBox"))
.and_then(ratio_from_view_box),
};
SVGElementData {
source: self
.unsafe_get()
.cached_serialized_data_url
.borrow()
.clone(),
width,
height,
ratio,
}
}
}
@ -112,6 +152,17 @@ impl VirtualMethods for SVGSVGElement {
self.invalidate_cached_serialized_subtree();
}
fn parse_plain_attribute(&self, name: &LocalName, value: DOMString) -> AttrValue {
match *name {
// TODO: This should accept lengths in arbitrary units instead of assuming px.
local_name!("width") | local_name!("height") => AttrValue::from_i32(value.into(), -1),
_ => self
.super_type()
.unwrap()
.parse_plain_attribute(name, value),
}
}
fn children_changed(&self, mutation: &super::node::ChildrenMutation) {
if let Some(super_type) = self.super_type() {
super_type.children_changed(mutation);

View file

@ -135,6 +135,9 @@ pub struct HTMLCanvasData {
pub struct SVGElementData {
/// The SVG's XML source represented as a base64 encoded `data:` url.
pub source: Option<Result<ServoUrl, ()>>,
pub width: Option<i32>,
pub height: Option<i32>,
pub ratio: Option<f32>,
}
/// The address of a node known to be valid. These are sent from script to layout.

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@ -1,2 +0,0 @@
[float-replaced-width-007.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[block-replaced-width-002.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[inline-block-replaced-height-009.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[inline-block-replaced-width-002.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[inline-block-replaced-width-007.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[inline-block-replaced-width-008.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[inline-replaced-height-009.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[inline-replaced-width-002.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[inline-replaced-width-008.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[inline-replaced-width-009.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[absolute-replaced-width-002.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[absolute-replaced-width-003a.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[absolute-replaced-width-003b.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[absolute-replaced-width-003c.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[absolute-replaced-width-009.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[absolute-replaced-width-023.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[absolute-replaced-width-030.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[absolute-replaced-width-037.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[absolute-replaced-width-051.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[absolute-replaced-width-065.xht]
expected: FAIL

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@ -1,2 +0,0 @@
[flex-aspect-ratio-img-column-018.html]
expected: FAIL

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@ -1,2 +0,0 @@
[flex-aspect-ratio-img-row-015.html]
expected: FAIL

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@ -1,6 +0,0 @@
[svg-root-as-flex-item-006.html]
[svg 1]
expected: FAIL
[svg 1: undefined]
expected: FAIL

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@ -0,0 +1,2 @@
[display-flex-svg-overflow-default.html]
expected: FAIL

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@ -10,9 +10,3 @@
[.test 8]
expected: FAIL
[.test 3]
expected: FAIL
[.test 7]
expected: FAIL

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@ -0,0 +1,2 @@
[replaced-aspect-ratio-stretch-fit-002.html]
expected: FAIL

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@ -1,30 +1,6 @@
[svg-intrinsic-size-001.html]
[svg 1: undefined]
expected: FAIL
[svg 2: undefined]
expected: FAIL
[svg 3: undefined]
expected: FAIL
[svg 4: undefined]
expected: FAIL
[svg 5: undefined]
expected: FAIL
[svg 1]
expected: FAIL
[svg 2]
expected: FAIL
[svg 3]
expected: FAIL
[svg 4]
expected: FAIL
[svg 5]
expected: FAIL

View file

@ -1,30 +1,6 @@
[svg-intrinsic-size-002.html]
[svg 1: undefined]
expected: FAIL
[svg 2: undefined]
expected: FAIL
[svg 3: undefined]
expected: FAIL
[svg 4: undefined]
expected: FAIL
[svg 5: undefined]
expected: FAIL
[svg 1]
expected: FAIL
[svg 2]
expected: FAIL
[svg 3]
expected: FAIL
[svg 4]
expected: FAIL
[svg 5]
expected: FAIL

View file

@ -1,30 +1,6 @@
[svg-intrinsic-size-003.html]
[svg 1: undefined]
expected: FAIL
[svg 2: undefined]
expected: FAIL
[svg 3: undefined]
expected: FAIL
[svg 4: undefined]
expected: FAIL
[svg 5: undefined]
expected: FAIL
[svg 1]
expected: FAIL
[svg 2]
expected: FAIL
[svg 3]
expected: FAIL
[svg 4]
expected: FAIL
[svg 5]
expected: FAIL

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@ -1,24 +1,6 @@
[svg-intrinsic-size-004.html]
[svg 1: undefined]
expected: FAIL
[svg 2: undefined]
expected: FAIL
[svg 3: undefined]
expected: FAIL
[svg 4: undefined]
expected: FAIL
[svg 1]
expected: FAIL
[svg 2]
expected: FAIL
[svg 3]
expected: FAIL
[svg 4]
[svg 5]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-no-ar-max-height-min-content.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-no-ar-min-height-min-content.html]
expected: FAIL

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@ -1,2 +0,0 @@
[css-skew-001.html]
expected: FAIL

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@ -1,2 +0,0 @@
[css-skew-002.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-transform-group-011.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-transform-nested-021.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-transform-nested-029.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-036.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-039.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-041.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-042.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-043.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-044.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-045.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-046.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-048.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-058.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-059.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-060.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-061.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-062.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-063.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-064.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-065.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-066.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-067.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-068.html]
expected: FAIL

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@ -1,2 +0,0 @@
[svg-matrix-069.html]
expected: FAIL

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@ -0,0 +1,2 @@
[svg-scale-001.html]
expected: FAIL

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@ -0,0 +1,2 @@
[svg-scale-002.html]
expected: FAIL

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@ -0,0 +1,2 @@
[svg-scale-003.html]
expected: FAIL

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@ -0,0 +1,2 @@
[svg-scale-004.html]
expected: FAIL

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@ -0,0 +1,2 @@
[svg-scale-008.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-scale-009.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-scale-010.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-scale-011.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-scale-012.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-scale-013.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-scale-014.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-scale-015.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-scale-016.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-scale-017.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-skewx-with-units.html]
expected: FAIL

View file

@ -0,0 +1,2 @@
[svg-skewy-with-units.html]
expected: FAIL

View file

@ -1,2 +0,0 @@
[svg-translate-with-units.html]
expected: FAIL

View file

@ -1,7 +1,3 @@
[outer-svg.html]
[scrollWidth, scrollHeight, scrollTop and scrollLeft work on outer svg element]
expected: FAIL
[clientWidth, clientHeight, clientTop and clientLeft work on outer svg element]
expected: FAIL

View file

@ -1,2 +0,0 @@
[svg-feimage-004.html]
expected: FAIL