Can I use an animated gif in a feDisplacementMap filter?
I tried something like this, without any result:
<filter id="filter" x="0" y="0" width="100%" height="100%">
<feImage xlink:href="animation.gif" result="gif" />
<feDisplacementMap in="SourceGraphic" in2="gif" scale="6" xChannelSelector="R" yChannelSelector="B"/>
</filter>
Related
I am trying to apply a Vignette effect on images with SVG filters. I am trying to implement this with the <fePointLight> primitive, but I find this a bit limited in that it is always has a circular shape. Is it possible to change the width such that the lighting effect takes on a wide elliptical shape? This is currently the filter I am using:
<filter id="vignette">
<feFlood id="flood-5" result="blackfield-6" x="0%" y="0%" width="100%" height="100%" flood-color="#000000" flood-opacity="1"/>
<feSpecularLighting id="specular-5" result="Spotlight-6" lighting-color="#FFFFFF" surfaceScale="1" specularConstant="1" specularExponent="100">
<fePointLight id="pointlight-5" x="720" y="450" z="1200"/>
</feSpecularLighting>
<feBlend id="svg-7" result="A-6" in="blackfield-6" in2="Spotlight-6" mode="lighten"/>
<feBlend id="blend-5" result="B-6" in="A-6" in2="SourceGraphic" mode="multiply"/>
</filter>
I am aware that it is possible to do this with a radial gradient effect on a separate shape, but I have a requirement that it must be done purely using SVG filters.
The values of the x=350 and y=240 attributes of the fePointLight filter are chosen so that the point is in the center of the image.
Different values for the z attribute of the fePointLight filter render the light source at different depths in relation to the drawing. The nearest position corresponds to the largest size.
Please watch in full screen
Hover over image
#img {
width:700px;
height:481px;
}
#img:hover {
filter:url(#spotlight);
}
<img id="img" src="https://i.stack.imgur.com/mBuDo.jpg" >
<svg width="700" height="481" viewBox="0 0 700 481" xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<defs>
<filter id="spotlight">
<feSpecularLighting result="spotlight" specularConstant="3.5"
specularExponent="70" lighting-color="grey">
<fePointLight x="350" y="240" z="520"/>
</feSpecularLighting>
<feComposite in="SourceGraphic" in2="spotlight" operator="in"/>
</filter>
</defs>
</svg>
Other image
#img {
width:700px;
height:481px;
}
#img:hover {
filter:url(#spotlight);
}
<img id="img" src="https://i.stack.imgur.com/GlhkD.jpg" >
<svg width="700" height="481" viewBox="0 0 700 481" xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<defs>
<filter id="spotlight">
<feSpecularLighting result="spotlight" specularConstant="3.5"
specularExponent="70" lighting-color="grey">
<fePointLight x="350" y="240" z="520"/>
</feSpecularLighting>
<feComposite in="SourceGraphic" in2="spotlight" operator="in"/>
</filter>
</defs>
If you want that sort of effect (elliptical light), you probably want to be using a spotlight rather than a point light.
If you offset the light position to one side and shine the cone down at a shallow-ish angle, you will get an elliptical spot.
<svg width="600" height="529">
<defs>
<filter id="spotlight">
<feSpecularLighting result="spotlight" specularConstant="1.5"
specularExponent="4" lighting-color="#FFF">
<feSpotLight x="-200" y="265" z="400" limitingConeAngle="10" pointsAtX="300" pointsAtY="265" />
</feSpecularLighting>
<feComposite in="SourceGraphic" in2="spotlight" operator="out" k1="0" k2="1" k3="1" k4="0"/>
</filter>
</defs>
<rect x="0" y="0" width="600" height="529" style="fill: skyblue; filter:url(#spotlight);"/>
</svg>
Note that the lighting filter components can be unreliable to use. Each browser has differences in interpretation of the standard. Not to mention some bugs.
A point in case is the above example, which looks different in Firefox and Chrome.
But good luck with your project.
I have this code in which I want to add a feGaussianBlur to a <rect/> element:
<svg xmlns="http://www.w3.org/2000/svg" width="1000" height="1000">
<defs>
<filter id="f">
<feGaussianBlur in="SourceGraphic" stdDeviation="20"/>
</filter>
</defs>
<rect x="100" y="100" height="200" width="180" fill="green" filter="url(#f)"/>
</svg>
The output is rendered like this:
As you can see, that the sides are not softened. The sides have a hard border.
But, when I decrease the value of the stdDeviation, it works well. Here is the output if the value of stdDeviation is set to 10:
Why is it not working properly with a value greater than 10? And what can I do to achieve it?
Expand the filter region
x="-20%" y="-20%" width="150%" height="150%"
See Filter effects region
<svg xmlns="http://www.w3.org/2000/svg" width="1000" height="1000">
<defs>
<filter id="f" x="-20%" y="-20%" width="150%" height="150%">
<feGaussianBlur in="SourceGraphic" stdDeviation="20"/>
</filter>
</defs>
<rect x="100" y="100" height="200" width="180" fill="green" filter="url(#f)"/>
</svg>
I'm trying to apply a texture tint to the SVG.
It's working almost fine but I need to make the texture as a tile for a better image quality
<filter id="composite" x="0" y="0" width="100%" height="100%">
<feImage result="sourceTwo" xlink:href="_link_" />
<feComposite in="SourceGraphic" in2="sourceTwo" operator="arithmetic" k1="1"/>
</filter>
How to replace feImage with a tile of the same image
jsFiddle
This is what the feTile primitive is for - but there is a regression bug in Chrome that clips the content - this is reported and a fix has been checked in (but still - buggy for now).
<svg width="500px" height="600px" viewBox="0 0 500 600">
<defs>
<filter id="composite" x="0%" y="0%" width="100%" height="100%">
<feImage result="sourceTwo" xlink:href="http://demo.prestalife.net/media/wood.jpg" width="34" height="34"/>
<feTile result="tiledImage"/>
<feComposite in="SourceGraphic" in2="tiledImage" operator="arithmetic" k1="1" k2="0" k3="0" k4="0"/>
</filter>
</defs>
<text x="0" y="20">Original image</text>
<image width="34" height="34" x="0" y="30" xlink:href="http://demo.prestalife.net/media/wood.jpg" />
<g filter="url(#composite)">
<rect fill="red" width="100%" height="100%" x="0" y="80" />
</g>
</svg>
I want to create rectangle with smoothed border. Important part that size of it's solid part should be certain. To clarify I'll give an example:
I can achieve desired effect with Gaussian filter:
<svg id="svg-root" width="800" height="600"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="test-body-content">
<defs>
<filter id="blur" filterUnits="userSpaceOnUse">
<feGaussianBlur in="SourceGraphic" stdDeviation="10" result="blur" />
<feMerge>
<feMergeNode in="blur" />
</feMerge>
</filter>
</defs>
<rect x="50" y="50" width="200" height="100" fill="black" filter="url(#blur)"/>
</g>
</svg>
Result:
But it doesn't meet requirements because it is not fully solid within given dimensions (width="200" height="100"):
Also I thought about applying gradient perpendicular to stroke, but SVG doesn't support such thing.
As #ABFORCE wrote you can provide the width and height you want via the filter element.
For example:
<filter id="blur" filterUnits="objectBoundingBox"
x="0" y="0" width="100%" height="100%">
...
</filter>
Note that this means that above filter will be clipped to the boundingbox of the filtered element.
If you want the original shape in the filter output you could add another feMergeNode like this:
<svg id="svg-root" width="800" height="600"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="test-body-content">
<defs>
<filter id="blur" filterUnits="userSpaceOnUse">
<feGaussianBlur in="SourceGraphic" stdDeviation="10" result="blur" />
<feMerge>
<feMergeNode in="blur" />
<feMergeNode in="SourceGraphic"/>
</feMerge>
</filter>
</defs>
<rect x="50" y="50" width="200" height="100" fill="black" filter="url(#blur)"/>
</g>
</svg>
Live example.
I'm using the "offset everything by half a pixel" trick discussed in the second answer to this question to get a crisp 1px stroke on a shape.
(There are rounded edges involved, so the shape-rendering: crispEdges solution isn't viable here -- it makes the curved parts of strokes look terrible.)
How come adding a filter (I'm using a gaussian blur + offset filter to implement a drop shadow) breaks the half-pixel offset hack?
You can play with the jsfiddle.
<svg xmlns="http://www.w3.org/2000/svg" version="1.1">
<defs>
<filter id="f1" x="-20%" y="-20%" width="160%" height="160%">
<feOffset result="offOut" in="SourceAlpha" dx="10" dy="10" />
<feGaussianBlur result="blurOut" in="offOut" stdDeviation="2" />
<feBlend in="SourceGraphic" in2="blurOut" mode="normal" />
</filter>
</defs>
<g transform="translate(5.5,5.5)">
<!-- This one has a blurry stroke -->
<rect width="50" height="50" rx="5" ry="5" stroke="black" stroke-width="1" fill="steelblue" filter="url(#f1)" />
<!-- This one has a crisp stroke -->
<rect x="150" width="50" height="50" rx="5" ry="5" stroke="black" stroke-width="1" fill="steelblue" />
</g>
</svg>
Apparently I can't post inline images as a new user, but you can this is an image of how the svg looks for me.
If you don't like the blurry edges, you can always experiment with adding an feComponentTransfer with feFuncA to manually manipulate the edge blur. Aka:
<filter id="fee" x="-20%" y="-20%" width="160%" height="160%">
<feComponentTransfer>
<feFuncA type="table" tableValues="0 0 1" />
</feComponentTransfer>
</filter>