The performance of my SVG Filter is dismal

Question

The performance of my SVG Filter is dismal

Here is the SVG filter I am using:

<svg style="visibility: hidden; height: 0; width: 0;">
    <filter id="rgbShift">
        <feOffset in="SourceGraphic" dx="1" dy="-1" result="text1" />
        <feFlood flood-color="#FF0000" result="redColor" />
        <feComposite in="redColor" in2="text1" operator="arithmetic" k1="1" result="red" />
        <feOffset in="SourceGraphic" dx="-1" dy="2" result="text2" />
        <feFlood flood-color="#00FF00" result="greenColor" />
        <feComposite in="greenColor" in2="text2" operator="arithmetic" k1="1" result="green" />
        <feOffset in="SourceGraphic" dx="-2" dy="1" result="text3" />
        <feFlood flood-color="#0000FF" result="blueColor" />
        <feComposite in="blueColor" in2="text3" operator="arithmetic" k1="1" result="blue" />
        <feComposite in="red" in2="green" operator="lighter" result="rb" />
        <feComposite in="rb" in2="blue" operator="lighter" />
    </filter>
</svg>

I have implemented this filter on my menu screen for a game project. However, when I try to apply the same filter to the game itself, it slows down significantly due to constant movement of elements on the page. Is there a way to optimize the filter for better performance?

javascript css svg svg-filters

Answer 1

Answer №1

Upon conducting informal testing using a single jpg picture in Inkscape, I observed that the suggested filter below appears to offer a noticeable increase in speed while maintaining mathematical integrity:

<filter id="rgbShift">
    <feOffset in="SourceGraphic" dx="1" dy="-1" />
    <feComponentTransfer result="red">
        <feFuncG type="discrete" tableValues="0" />
        <feFuncB type="discrete" tableValues="0" />
    </feComponentTransfer>
    <feOffset in="SourceGraphic" dx="-1" dy="2" />
    <feComponentTransfer result="green">
        <feFuncR type="discrete" tableValues="0" />
        <feFuncB type="discrete" tableValues="0" />
    </feComponentTransfer>
    <feOffset in="SourceGraphic" dx="-2" dy="1" />
    <feComponentTransfer result="blue">
        <feFuncR type="discrete" tableValues="0" />
        <feFuncG type="discrete" tableValues="0" />
    </feComponentTransfer>
    <feComposite in="red" in2="green" operator="arithmetic" k2="1" k3="1" result="rb" />
    <feComposite in="rb" in2="blue" operator="arithmetic" k2="1" k3="1" />
</filter>

While this filter proves beneficial, additional precautions may be taken to avoid time-sensitive operations (e.g., recomputing the filter for every frame):

Avoid applying the filter to animated elements.
Avoid applying the filter to elements where the filter effects region overlaps with animated element bounding boxes. Positioning above or below does not impact this interaction.

Answer 2

Upon conducting informal testing using a single jpg picture in Inkscape, I observed that the suggested filter below appears to offer a noticeable increase in speed while maintaining mathematical integrity:

<filter id="rgbShift">
    <feOffset in="SourceGraphic" dx="1" dy="-1" />
    <feComponentTransfer result="red">
        <feFuncG type="discrete" tableValues="0" />
        <feFuncB type="discrete" tableValues="0" />
    </feComponentTransfer>
    <feOffset in="SourceGraphic" dx="-1" dy="2" />
    <feComponentTransfer result="green">
        <feFuncR type="discrete" tableValues="0" />
        <feFuncB type="discrete" tableValues="0" />
    </feComponentTransfer>
    <feOffset in="SourceGraphic" dx="-2" dy="1" />
    <feComponentTransfer result="blue">
        <feFuncR type="discrete" tableValues="0" />
        <feFuncG type="discrete" tableValues="0" />
    </feComponentTransfer>
    <feComposite in="red" in2="green" operator="arithmetic" k2="1" k3="1" result="rb" />
    <feComposite in="rb" in2="blue" operator="arithmetic" k2="1" k3="1" />
</filter>

While this filter proves beneficial, additional precautions may be taken to avoid time-sensitive operations (e.g., recomputing the filter for every frame):

Avoid applying the filter to animated elements.
Avoid applying the filter to elements where the filter effects region overlaps with animated element bounding boxes. Positioning above or below does not impact this interaction.

Answer 3

Answer №2

It is uncertain whether the cause of your performance issues lies with feComposite, but it is worth noting that there are numerous syntax errors in your code.

In SVG 1.1, the "lighter" operator is not available in feComposite. This feature was introduced in the Filters 1.0 specification and is not universally supported across browsers. You may consider using feComposite with operator="arithmetic" k2="1" k3="1", which should produce similar results.
Using feBlend/multiply instead of feComposite/arithmetic is generally recommended as it tends to be more efficient in terms of performance.

An optimized version of the filter you intended to create could look like this:

<filter id="rgbShift">
    <feOffset in="SourceGraphic" dx="1" dy="-1" result="text1" />
    <feFlood flood-color="#FF0000" result="redColor" />
    <feBlend in="text1" in2="redColor" mode="multiply" result="red"/>
    <feOffset in="SourceGraphic" dx="-1" dy="2" result="text2" />
    <feFlood flood-color="#00FF00" result="greenColor" />
    <feBlend in="text2" in2="greenColor" mode="multiply" result="green"/>
    <feOffset in="SourceGraphic" dx="-2" dy="1" result="text3" />
    <feFlood flood-color="#0000FF" result="blueColor" />
    <feBlend in="text3" in2="blueColor" mode="multiply" result="blue"/>
    <feComposite in="red" in2="green" operator="arithmetic" k2="1" k3="1" result="rb" />
    <feComposite in="rb" in2="blue" operator="arithmetic" k2="1" k3="1"/>
</filter>

Answer 4

It is uncertain whether the cause of your performance issues lies with feComposite, but it is worth noting that there are numerous syntax errors in your code.

In SVG 1.1, the "lighter" operator is not available in feComposite. This feature was introduced in the Filters 1.0 specification and is not universally supported across browsers. You may consider using feComposite with operator="arithmetic" k2="1" k3="1", which should produce similar results.
Using feBlend/multiply instead of feComposite/arithmetic is generally recommended as it tends to be more efficient in terms of performance.

An optimized version of the filter you intended to create could look like this:

<filter id="rgbShift">
    <feOffset in="SourceGraphic" dx="1" dy="-1" result="text1" />
    <feFlood flood-color="#FF0000" result="redColor" />
    <feBlend in="text1" in2="redColor" mode="multiply" result="red"/>
    <feOffset in="SourceGraphic" dx="-1" dy="2" result="text2" />
    <feFlood flood-color="#00FF00" result="greenColor" />
    <feBlend in="text2" in2="greenColor" mode="multiply" result="green"/>
    <feOffset in="SourceGraphic" dx="-2" dy="1" result="text3" />
    <feFlood flood-color="#0000FF" result="blueColor" />
    <feBlend in="text3" in2="blueColor" mode="multiply" result="blue"/>
    <feComposite in="red" in2="green" operator="arithmetic" k2="1" k3="1" result="rb" />
    <feComposite in="rb" in2="blue" operator="arithmetic" k2="1" k3="1"/>
</filter>

The performance of my SVG Filter is dismal

Answer №1

Answer №2

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