I'm making SVG effects by combining 2 identical photos with alternate slits. When you look closely, there are dotted lines 45 degree across the whole images. Referencing this question, I already tried the option shape-rendering="optimizeQuality", shape-rendering="geometricPrecision" and shape-rendering="auto" on <polygon> tags, but the dots still appears.
How do I remove the tiny dots?
Partial HTML codes (full code is too long to post here, see JSFiddle below for full CSS, JS and HTML codes):
<div class="image_wrapper">
<svg id="svg-1" class="clip-svg">
<image class="svg-image" xlink:href="http://cdn.idigitaltimes.com/sites/idigitaltimes.com/files/styles/image_embed/public/2016/09/28/pen-pineapple-apple-pen-meaning-lyrics-ppap-piko-taro-youtube-video-watch-how-do_1.jpg" width="640" height="360" />
</svg>
</div>
<div class="image_wrapper2">
<svg id="svg-2" class="clip-svg">
<image class="svg-image" xlink:href="http://cdn.idigitaltimes.com/sites/idigitaltimes.com/files/styles/image_embed/public/2016/09/28/pen-pineapple-apple-pen-meaning-lyrics-ppap-piko-taro-youtube-video-watch-how-do_1.jpg" width="640" height="360" />
</svg>
</div>
JSFiddle demo is here
The dots are caused by anti-aliasing of the polygons that you are using for the diagonal slit clipping paths.
IMO there isn't any way to prevent that. It may or may not get better if you turn anti-aliasing off with `shape-rendering="optimizeSpeed". And even if that works on one browser, it may not work on other ones.
My suggestion is to just have a complete ("un-slitted") version of the image on top. Make it invisible initially, then show it once the animation has finished.
Related
I've searched all over the place and not have any success with this.
I'm making SVGs like the following one in order to make them scalable, and also help people who are dyslexic so they can highlight the text and use plugins like Read Out Loud:
https://www.ole.bris.ac.uk/bbcswebdav/institution/TEL/TEL%20guides/Published%20TEL%20guides/Replay/record-now-instructions-web.svg
But I've not been able to get my copy of NVDA to read out the tab-indexed fields as I tab through them. I've tried fields and aria-label on various things...
Is there something simple I can change so NVDA (and similar screen readers) will read out the text as I tab through (NVDA does this on HTML pages).
Or should I just put the full description of all the text in my description at the top?
I noticed you have role="img" in your svg root. That's borking everything, since it tells the accessibility API that it is just a single element, whose accessible name is always aria-labelledby="svgTitle svgDesc"
Try changing that to role="graphics-document" (or perhaps role="application" if you want fancier interactions) and I think you'll have a whole lot more luck.
The other option is to remove the role attribute from the <svg> element. It sounds counterintuative, but it should make any <text> elements accessible.
For an example, see tip 5 in this SitePoint article, which has great background and other helpful tips on making SVG more accessible in different use cases:
Tips for Creating Accessible SVG
From the above article:
<svg version="1.1" width="300" height="200" aria-labelledby="title desc">
<title id="title">Green rectangle</title>
<desc id="desc">A light green rectangle with rounded corners and a dark green border.</desc>
<rect width="75" height="50" rx="20" ry="20" fill="#90ee90" stroke="#228b22" stroke-fill="1" />
<text x="35" y="30" font-size="1em" text-anchor="middle" fill="#000000">Website</text>
</svg>
I want to add multiple lines of text to an svg, which would be contained within the svg (does not overflow). How can I do that?
I knew that the text tag is used in svg, but I discovered that it's single lined. Then, when I give it textLength (so that it would contained in specific svg), its words overlap with each other. How can I put multiple lines of text which would adjust in svg tag? The code I tried is below:
<svg width="200" height="60" style="border: 1px solid black;">
<text x="10" y="30" textLength="180" style="font-size: 30px;">The paragraph here</text>
</svg>
It doesn't work. SVG has no mechanism for breaking lines.
That said, you would be able to encapsulate a html <p> tag as a foreignObject:
<svg xmlns="http://www.w3.org/2000/svg"
width="21cm" height="29.7cm" style="border:1px solid black;">
<foreignObject x="6.4cm" y="3.6cm" width="10cm" height="10cm">
<p xmlns="http://www.w3.org/1999/xhtml"
style="font-size:48px;">The paragraph here</p>
</foreignObject>
</svg>
Please note that the namespace declarations must be given, and you need to write valid XHML for this to work.
In addition, foreignObject is part of the SVG context, so a width and height need to be set, otherwise it will have no inherent size.
I am looking for clarification about combining <title> and <desc> with the element for Accessibility. Is the following a valid implemention?
<svg>
<title>This is an SVG</title>
<desc">Lorem ipsum descriptum...</desc>
<use xlink:href="#symbolID"></use>
</svg>
Or would you place it in the <symbol> element like this?
<symbol id="symbolID">
<title>This is an svg</title>
<desc>Lorem ipsum ...</desc>
<path d="......"/>
</symbol>
Would screen readers be able to pick these up?
Add a role="img" and a screen reader can pick it up. It may announce both the <title> and the <desc> depending on screen reader, browser, and versions of each.
For a little extra compatibility you can added aria-labelledby to tell the screen reader where to look for the explicit accessible name (which also means it may not announce the <desc>). Some combos may read the <title> twice as a result, too, so it behooves you to be brief.
<a href="#"> foo
<svg role="img" aria-labelledby="twitterTitle">
<title id="twitterTitle">Twitter Account</title>
<desc>Twitter account for example</desc>
<use xlink:href="#twitter"/>
</svg>
</a>
I forked your CodePen and marked it up.
You may have already seen these two articles, but if not:
Tips for Creating Accessible SVG at SitePoint by Léonie Watson,
Accessible SVGs at CSS-Tricks by Heather Migliorisi.
I have sport schedules that I would like users to be able to print out on 2 or 4 pages. Tournaments with a large amount of teams would produce hard to read text because there isn't much space for it.
Not sure how to produce printable content with d3js, should I specify values for placement and size in pixels, centimetres, percentage? Percentage sounds good but would need to insert a page break element, maybe provide a separate svg for every page. Can't find a good article on how to do this and am wondering if I've missed something.
The code as is should produce lines with text labels, to fit it all on 2 pages the text in the labels would be very small so want to provide a 4 page version. So my question is: What would be the best way to do this?
I'm thinking of providing 4 or 2 svg elements with a page-break-after css style. The shape and dimensions would be roughly letter or a4 landscape and placement units are based on percentages.
[UPDATE]
Since pageSet and page elements seem to be ignored by Firefox (and inkscape) and wrongly interpreted by Chrome I've tried multiple svg's. This seems to print fine on my new but not latest Firefox and Chrome. Code I use is:
<html><head>
<title>Test tournament bracket</title>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
<style>
#media print {
.noPrint {display:none;}
}
</style>
</head>
<body>
<div class="noPrint">
<h1>Forms and non printable content</h1>
</div>
<svg width="70" height="55">
<text x="10"
y="10" font-family="sans-serif"
font-size="12px" fill="black">
Hello
</text>
</svg>
<div style="page-break-after: always;"></div>
<svg width="70" height="55">
<text x="10"
y="10" font-family="sans-serif"
font-size="12px" fill="black">
World
</text>
</svg>
</body></html>
Will give that a shot and see how it turns out.
How could one obtain nine-slice scaling in SVG?
Specifically, I'm looking for a way to define SVG objects that behave like nine-sliced objects when resized (some elements maintain their dimension, and others scale with the container).
If you meant to apply it to an svg, then the CSS3 Borders and backgrounds spec should help you do that if you reference an svg.
If you meant you wanted to do it inside an svg file, then you might be able to use a <pattern> (possibly combined with some nested <svg> elements) to do something similar. Nested <svg> elements might be another way to do this, see e.g this example. Alternatively use 9 <use> elements with different transforms, each having a different clip-path applied.
You need something like a margin around the elements that form the edges and the center, to tell them to start X pixels from the left/top to y pixels from the right/bottom. Use a foreignObject, like this:
<foreignObject width="100%" height="100px">
<div xmlns="http://www.w3.org/1999/xhtml" style="margin: 0 100px;">
<svg>
<!-- code here -->
</svg>
</div>
</foreignObject>
I wrote about methods of applying scaling grids to SVG here: http://w3.eleqtriq.com/2014/03/the-holy-grail-of-image-scaling/
Cheers, Dirk