I am struggling with an svg to blur background under text on Google Chrome 36.0.1985.125 linux. The svg is like
<svg width="500px" height="500px" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<defs>
<filter id="myfilter" filterUnits="objectBoundingBox" x="0" y="0" width="100%" height="100%">
<feGaussianBlur result="blurOut" in="BackgroundImage" stdDeviation="2" />
<feBlend in2="blurOut" in="SourceGraphic" mode="normal" />
</filter>
</defs>
<g enable-background="new">
<text x="10" y="100" stroke="none" fill="red" fill-opacity="1" font-size="24">BACKGROUND</text>
<text x="20" y="100" stroke="none" fill="black" fill-opacity="1" font-size="26" filter="url(#myfilter)">text</text>
</g>
</svg>
Fiddle: http://jsfiddle.net/2o2trpc1/
Thus I would like to blur "BACKGROUND" behind "text", but "text" does not appear at all. Can someone please look at this what I am doing wrong? Where can I check that the browser version supports filtering background image?
thanks a lot,
Balazs
You will have to work around the lack of BackgroundImage. There are multiple ways to do that, if your code is as simple as the fiddle you posted something like this could work:
<body>
<svg width="500px" height="500px" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<defs>
<filter id="blur" filterUnits="objectBoundingBox" x="0" y="0" width="100%" height="100%">
<feGaussianBlur result="blurOut" stdDeviation="2" />
</filter>
</defs>
<g>
<text x="10" y="100" stroke="none" fill="red" fill-opacity="1" font-size="24" filter="url(#blur)">BACKGROUND</text>
<text x="20" y="100" stroke="none" fill="black" fill-opacity="1" font-size="26">text</text>
</g>
</svg>
</body>
See fiddle.
Another option is to use <feImage xlink:href="#background"/> in the filter, instead of using BackgroundImage. This can bring in whatever element you want.
<body>
<svg width="500px" height="500px" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<defs>
<filter id="myfilter" filterUnits="userSpaceOnUse" x="0" y="0" width="100%" height="100%">
<feImage xlink:href="#background"/>
<feGaussianBlur stdDeviation="3" />
<feBlend in="SourceGraphic" mode="normal" />
</filter>
<text id="background" x="10" y="100" stroke="none" fill="red" fill-opacity="1" font-size="24">BACKGROUND</text>
</defs>
<g>
<text x="20" y="100" stroke="none" fill="black" fill-opacity="1" font-size="26" filter="url(#myfilter)">text</text>
</g>
</svg>
</body>
See fiddle.
Related
Is it possible to vertically center align all the rects inside a tag without having to adjust the y attributes on <rect>? (see snippet for example)
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3/org/1999/xlink" viewBox="0 0 225 38" preserveAspectRatio="none" width="100%" height="100%">
<g fill="black">
<rect x="10" y="1" width="6" height="5" />
<rect x="20" y="1" width="6" height="10" />
<rect x="30" y="1" width="6" height="20" />
<rect x="40" y="1" width="6" height="5" />
<rect x="50" y="1" width="6" height="15" />
</g>
</svg>
<h3>desired result</h3>
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3/org/1999/xlink" viewBox="0 0 225 38" preserveAspectRatio="none" width="100%" height="100%">
<g fill="black">
<rect x="10" y="8" width="6" height="5" />
<rect x="20" y="6" width="6" height="10" />
<rect x="30" y="1" width="6" height="20" />
<rect x="40" y="8" width="6" height="5" />
<rect x="50" y="4" width="6" height="15" />
</g>
</svg>
No, it's not possible to center align <rect> elements.
But it is possible to center-align <line> elements and give them a stroke-width (note the viewBox is vertically centered around 0):
<svg viewBox="0 -19 225 38" width="100%" height="100%">
<g stroke="black">
<line x1="10" x2="16" stroke-width="5" />
<line x1="20" x2="26" stroke-width="10" />
<line x1="30" x2="36" stroke-width="20" />
<line x1="40" x2="46" stroke-width="5" />
<line x1="50" x2="56" stroke-width="15" />
</g>
</svg>
You could also achieve vertically centered <rect> elements by setting a transform: translate(0, -50%) css rule.
This approach also requires a transform-box: fill-box; (or content-box) property.
All <rect>elements get a y="50%" attribute to start at the vertical center of the svg viewBox.
<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3/org/1999/xlink" viewBox="0 0 225 38" width="100%" height="100%" style="border:1px solid #ccc">
<style>
rect {
transform: translate(0, -50%);
transform-origin: center;
transform-box: fill-box;
}
</style>
<g fill="black" >
<rect x="10" y="50%" width="6" height="5" />
<rect x="20" y="50%" width="6" height="10" />
<rect x="30" y="50%" width="6" height="20" />
<rect x="40" y="50%" width="6" height="5" />
<rect x="50" y="50%" width="6" height="15" />
</g>
</svg>
Browser support for transform-box is decent. (See caniuse).
However, if you need legacy browser (e.g. ie11) support, #ccprog's answer is a more robust solution.
I have rectangles / paths as rectangles with a glow effect. That works well as long as I do not mask the inner part (i.e. hiding either the filling or the glowing inside of the rectangles). Masking part of the objects produces some ugly effect of the previously smooth glow.
So, applying the mask seems to render the previous "image" somehow. Is there a way to avoid this? If not, are there alternatives?
<svg id="button-glow" width="400" height="400" viewBox="0 0 400 400" xmlns="http://www.w3.org/2000/svg" version="1.1">
<defs>
<filter id="cyan-glow" x="-5000%" y="-5000%" width="10000%" height="10000%">
<feFlood result="flood" flood-color="#00e4ff" flood-opacity="1"></feFlood>
<feComposite in="flood" result="mask" in2="SourceGraphic" operator="in"></feComposite>
<feMorphology in="mask" result="dilated" operator="dilate" radius="2"></feMorphology>
<feGaussianBlur in="dilated" result="blurred" stdDeviation="5"></feGaussianBlur>
<feMerge>
<feMergeNode in="blurred"></feMergeNode>
<feMergeNode in="SourceGraphic"></feMergeNode>
</feMerge>
</filter>
<mask id="Mask1">
<rect x="-100" y="-100" width="250" height="250" fill="white" />
<rect x="3" y="3" width="34" height="34" fill="black" />
</mask>
<mask id="Mask2">
<rect x="-100" y="-100" width="250" height="250" fill="white" />
<rect x="3" y="3" width="34" height="34" fill="black" />
</mask>
</defs>
<g transform="translate(20,20)">
<rect x="0" y="0" width="40" height="40" fill="#00e4ff"/>
<rect transform="translate(60,0)" x="0" y="0" width="40" height="40"
fill="#00e4ff" style="filter:url(#cyan-glow)"/>
<rect transform="translate(120,0)" x="0" y="0" width="40" height="40"
fill="#00e4ff" style="filter:url(#cyan-glow)" mask="url(#Mask1)"/>
<path transform="translate(0,60)" d="M0,0 L40,0 L40,40 L0,40 z" stroke="#00e4ff"
stroke-width="3" fill="none"/>
<path transform="translate(60,60)" d="M0,0 L40,0 L40,40 L0,40 z" stroke="#00e4ff"
stroke-width="3" style="filter:url(#cyan-glow)" fill="none"/>
<path transform="translate(120,60)" d="M0,0 L40,0 L40,40 L0,40 z" stroke="#00e4ff"
stroke-width="3" style="filter:url(#cyan-glow)" fill="none" mask="url(#Mask2)"/>
</g>
</svg>
Just make the masks bigger.
You'd also be better off making the filter smaller. The huge filter size is why your SVG is very slow to render.
<svg id="button-glow" width="400" height="400" viewBox="0 0 400 400" xmlns="http://www.w3.org/2000/svg" version="1.1">
<defs>
<filter id="cyan-glow" x="-5000%" y="-5000%" width="10000%" height="10000%">
<feFlood result="flood" flood-color="#00e4ff" flood-opacity="1"></feFlood>
<feComposite in="flood" result="mask" in2="SourceGraphic" operator="in"></feComposite>
<feMorphology in="mask" result="dilated" operator="dilate" radius="2"></feMorphology>
<feGaussianBlur in="dilated" result="blurred" stdDeviation="5"></feGaussianBlur>
<feMerge>
<feMergeNode in="blurred"></feMergeNode>
<feMergeNode in="SourceGraphic"></feMergeNode>
</feMerge>
</filter>
<mask id="Mask1" x="-40%" y="-40%" width="180%" height="180%">
<rect x="-100" y="-100" width="250" height="250" fill="white" />
<rect x="3" y="3" width="34" height="34" fill="black" />
</mask>
<mask id="Mask2" x="-40%" y="-40%" width="180%" height="180%">
<rect x="-100" y="-100" width="250" height="250" fill="white" />
<rect x="3" y="3" width="34" height="34" fill="black" />
</mask>
</defs>
<g transform="translate(20,20)">
<rect x="0" y="0" width="40" height="40" fill="#00e4ff"/>
<rect transform="translate(60,0)" x="0" y="0" width="40" height="40"
fill="#00e4ff" style="filter:url(#cyan-glow)"/>
<rect transform="translate(120,0)" x="0" y="0" width="40" height="40"
fill="#00e4ff" style="filter:url(#cyan-glow)" mask="url(#Mask1)"/>
<path transform="translate(0,60)" d="M0,0 L40,0 L40,40 L0,40 z" stroke="#00e4ff"
stroke-width="3" fill="none"/>
<path transform="translate(60,60)" d="M0,0 L40,0 L40,40 L0,40 z" stroke="#00e4ff"
stroke-width="3" style="filter:url(#cyan-glow)" fill="none"/>
<path transform="translate(120,60)" d="M0,0 L40,0 L40,40 L0,40 z" stroke="#00e4ff"
stroke-width="3" style="filter:url(#cyan-glow)" fill="none" mask="url(#Mask2)"/>
</g>
</svg>
I have an SVG file which represents a map using different paths.
https://imgur.com/a/YyTyz
These paths represents different areas; I need to make bold the outer stroke that these paths create, as represented in this picture (note that there are 2 SVGs in a single file).
https://imgur.com/a/0fepe
Is it possible to achieve thisin a simple way?
Thanks in advice
Assuming that each of the areas of the map are their own path - and that you don't already have a path around the outside, then the simplest solution is to:
duplicate the map
put it at the back
give the map paths a thicker stroke
For example, let's start with the following simplified example.
<svg width="400" height="200">
<rect x="50" y="50" width="200" height="50" fill="linen" stroke="black"/>
<rect x="250" y="50" width="100" height="50" fill="linen" stroke="black"/>
<rect x="50" y="100" width="150" height="50" fill="linen" stroke="black"/>
<rect x="200" y="100" width="150" height="50" fill="linen" stroke="black"/>
</svg>
If we take a copy of those elements and give it a thicker stroke, we get:
<svg width="400" height="200">
<g fill="linen" stroke="black" stroke-width="5">
<rect x="50" y="50" width="200" height="50"/>
<rect x="250" y="50" width="100" height="50"/>
<rect x="50" y="100" width="150" height="50"/>
<rect x="200" y="100" width="150" height="50"/>
</g>
<rect x="50" y="50" width="200" height="50" fill="linen" stroke="black"/>
<rect x="250" y="50" width="100" height="50" fill="linen" stroke="black"/>
<rect x="50" y="100" width="150" height="50" fill="linen" stroke="black"/>
<rect x="200" y="100" width="150" height="50" fill="linen" stroke="black"/>
</svg>
To keep the file as small as possible, we can reuse the paths for both copies of the map:
<svg width="400" height="200">
<defs>
<g id="map">
<rect x="50" y="50" width="200" height="50"/>
<rect x="250" y="50" width="100" height="50"/>
<rect x="50" y="100" width="150" height="50"/>
<rect x="200" y="100" width="150" height="50"/>
</g>
</defs>
<use xlink:href="#map" fill="linen" stroke="black" stroke-width="5"/>
<use xlink:href="#map" fill="linen" stroke="black"/>
</svg>
It's not necessarily the most elegant solution, since all the map elements get drawn twice. But it is the simplest solution.
I have this CODEPEN and here are my issues:
I am not understanding why the gradient I applied and referenced as my mask fill like so, doesn't render as it should. It should go from fully opaque to fully transparent. For the gradient I am using: http://angrytools.com/gradient/?0_800080,100_450045&0_0,100_100&l_180:
<mask id="myMask" x="0" y="0" width="100%" height="100%">
<rect x="0" y="0" width="100%" height="100%" fill="url(#grad1)" />
</mask>
In addition I don't understand why if I remove the fill="blue" attribute from my use element like so:
<use xlink:href="#myText" mask="url(#myMask)" />
The text appears black as if no gradient was applied. The gradient I defined is purple..
Thanks!
if you just want to apply your gradient to your text, there is no need to use masks, because gradients support the stop-opacity property.
<svg xmlns="http://www.w3.org/2000/svg" width="200px" height="200px">
<defs>
<linearGradient id="lgrad" x1="100%" y1="50%" x2="0%" y2="50%">
<stop offset="0%" style="stop-color:rgb(128,0,128);stop-opacity:0" />
<stop offset="100%" style="stop-color:rgb(69,0,69);stop-opacity:1" />
</linearGradient>
<text x="100" y="120" text-anchor="middle" id="myText" font-size="50">Hello</text>
</defs>
<use xlink:href="#myText" fill="url(#lgrad)" />
</svg>
you only need masks if you want to seperate the opacity from your fills:
<svg xmlns="http://www.w3.org/2000/svg" width="200px" height="200px">
<defs>
<linearGradient id="lgrad" x1="100%" y1="50%" x2="0%" y2="50%">
<stop offset="0" stop-color="black" />
<stop offset="1" stop-color="white" />
</linearGradient>
<mask id="myMask" x="0" y="0" width="100%" height="100%">
<rect x="0" y="0" width="100%" height="100%" fill="url(#lgrad)" />
</mask>
<text x="100" y="120" text-anchor="middle" id="myText" font-size="50">Hello</text>
</defs>
<g mask="url(#myMask)">
<use xlink:href=" #myText" transform="translate(0,-50) " fill="red " />
<use xlink:href="#myText" transform="translate(0,0)" fill="green" />
<use xlink:href="#myText" transform="translate(0,50)" fill="blue" />
</g>
</svg>
masks turn colors into opacity information. going from black(totally transparent) to white (totally opaque)
<svg xmlns="http://www.w3.org/2000/svg" width="200px" height="200px">
<defs>
<mask id="myMask" x="0" y="0" width="100%" height="100%">
<rect x="0" y="0" width="50%" height="50%" fill="white" />
<rect x="50%" y="0" width="50%" height="50%" fill="#333" />
<rect x="0%" y="50%" width="50%" height="50%" fill="#aaa" />
<rect x="50%" y="50%" width="50%" height="50%" fill="white" />
<circle cx="50%" cy="50%" r="15%" fill="black" />
</mask>
<text x="100" y="120" text-anchor="middle" id="myText" font-size="50">Hello</text>
</defs>
<rect x="0" y="0" width="100%" height="100%" fill="beige" />
<g mask="url(#myMask)">
<use xlink:href="#myText" transform="translate(0,-50)" fill="red" />
<use xlink:href="#myText" transform="translate(0,0)" fill="green" />
<use xlink:href="#myText" transform="translate(0,50)" fill="blue" />
</g>
</svg>
My goal is to have the first group of 3 squares be blue and the next group of 3 squares be red. To minimize code, I want to take advantage of grouping in SVG. All the rectangles remain blue. I have tried inline styling on the second group element and on the use element, but that doesn't solve the problem. Thank you for your assistance.. Here's the code:
<svg width="1000" height="800"
xmlns="http://www.w3.org/2000/svg" version="1.1"
xmlns:xlink="http://www.w3.org/1999/xlink">
<style>
.blue {fill:blue;}
.red {fill:red;}
</style>
<g id="g1" class="blue">
<rect x="0" y="0" width="100" height="100" />
<rect x="0" y="105" width="100" height="100" />
<rect x="0" y="210" width="100" height="100" />
</g>
<g class="red">
<use xlink:href="#g1" transform="translate(0,315)" />
</g>
Here are changes from above that now have it working:
<g class="blue">
<g id="g1">
<rect x="0" y="0" width="100" height="100" />
<rect x="0" y="105" width="100" height="100" />
<rect x="0" y="210" width="100" height="100" />
</g>
</g>
<g class="red" transform="translate(0,315)">
<use xlink:href="#g1" />
<!-- <g id="g1">
<rect x="0" y="0" width="100" height="100" />
<rect x="0" y="105" width="100" height="100" />
<rect x="0" y="210" width="100" height="100" />
</g> -->
</g>
... I commented out some of the old svg as well.
Here's the solution in a clearer form (some of the commented code above, actually came from further experimenting).
<svg width="1000" height="800"
xmlns="http://www.w3.org/2000/svg" version="1.1"
xmlns:xlink="http://www.w3.org/1999/xlink">
<style>
.blue {fill:blue;}
.red {fill:red;}
</style>
<g class="blue">
<g id="g1">
<rect x="0" y="0" width="100" height="100" />
<rect x="0" y="105" width="100" height="100" />
<rect x="0" y="210" width="100" height="100" />
</g>
</g>
<g class="red" transform="translate(0,315)">
<use xlink:href="#g1" />
</g>
Looks like styling needs to be done at a level above a group in my case and that the as Robert pointed out will retrieve the previous group as written.