Crate usvg[−][src]
usvg
(micro SVG) is an SVG simplification tool.
Purpose
Imagine, that you have to extract some data from the SVG file, but your library/framework/language doesn't have a good SVG library. And all you need is paths data.
You can try to export it by yourself (how hard can it be, right). All you need is an XML library (I'll hope that your language has one). But soon you realize that paths data has a pretty complex format and a lot of edge-cases. And we didn't mention attributes propagation, transforms, visibility flags, attribute values validation, XML quirks, etc. It will take a lot of time and code to implement this stuff correctly.
So, instead of creating a library that can be used from any language (impossible), usvg takes a different approach. It converts an input SVG to an extremely simple representation, which is still a valid SVG. And now, all you need is to convert your SVG to a simplified one via usvg and an XML library with some small amount of code.
Key features of the simplified SVG
- No basic shapes (rect, circle, etc). Only paths
- Simple paths:
- Only MoveTo, LineTo, CurveTo and ClosePath will be produced
- All path segments are in absolute coordinates
- No implicit segment commands
- All values are separated by space
- All (supported) attributes are resolved. No implicit one
- No
use
. Everything is resolved - No invisible elements
- No invalid elements (like
rect
with negative/zero size) - No units (mm, em, etc.)
- No comments
- No DTD
- No CSS (partial support)
- No
script
(simply ignoring it)
Full spec can be found here.
Limitations
- Currently, it's not lossless. Some SVG features isn't supported yet and will be ignored.
- CSS support is minimal.
- Scripting and animation isn't supported and not planned.
a
elements will be removed.- Unsupported elements:
- filter-based elements
- font-based elements
marker
symbol
view
foreignObject
Re-exports
pub extern crate svgdom; |
pub extern crate lyon_geom; |
Modules
prelude |
Basic traits for tree manipulations. |
utils |
Some useful utilities. |
Macros
try_opt |
Task, return value. |
try_opt_warn |
Task, return value, warning message. |
Structs
AspectRatio |
Representation of the |
BaseGradient |
A generic gradient. |
ClipPath |
A clip-path element. |
Color |
Representation of the |
Fill |
A fill style. |
Font |
A font description. |
Group |
A group container. |
Image |
A raster image element. |
LinearGradient |
A linear gradient. |
Mask |
A mask element. |
NumberList |
Representation of the |
Opacity |
An opacity value. |
Options |
Processing options. |
Path |
A path element. |
Pattern |
A pattern element. |
Point |
A 2D point representation. |
RadialGradient |
A radial gradient. |
Rect |
A rect representation. |
Size |
A 2D size representation. |
Stop |
Gradient's stop element. |
Stroke |
A stroke style. |
Svg |
An SVG root element. |
Text |
A text element. |
TextChunk |
A text chunk. |
TextDecoration |
A text decoration. |
TextDecorationStyle |
A text decoration style. |
TextSpan |
A text span. |
Transform |
Representation of the |
Tree |
A nodes tree container. |
ViewBox |
View box. |
Enums
Align |
Representation of the |
Error |
List of all errors. |
FillRule |
A fill rule. |
FontStretch |
A font stretch. |
FontStyle |
A font style. |
FontVariant |
A font variant. |
FontWeight |
A font weight. |
ImageData |
A raster image container. |
ImageFormat |
An image codec. |
LineCap |
A line cap. |
LineJoin |
A line join. |
NodeKind |
Node's kind. |
Paint |
A paint style. |
PathSegment |
A path absolute segment. |
SpreadMethod |
A spread method. |
TextAnchor |
A text anchor. |
Units |
An element units. |
Traits
FuzzyEq |
A trait for fuzzy/approximate equality comparisons. |
FuzzyZero |
A trait for fuzzy/approximate comparisons of |
NodeExt |
Additional |
Functions
f64_bound |
Bounds |
load_svg_file |
Loads SVG, SVGZ file content. |
Type Definitions
Node |
Alias for |
StopOffset |
An alias to |