LayoutTests/svg/filters/feImage-element-primitive-subregion.svg

<svg xmlns="http://www.w3.org/2000/svg">
    <meta name="fuzzy" content="maxDifference=0-1; totalPixels=0-75" />
    <defs>
        <rect id="red-rectangle" x="-100" y="-100" width="200" height="200" fill="red"/>
        <path id="green-triangle" d="M 0 0 L 150 0 L 150 150 z" fill="green"/>
        <path id="blue-triangle"  d="M 0 0 L 0 150 L 150 0 z" fill="blue"/>

        <filter id="red-rectangle-filter" x="0" y="0" width="1" height="1">
            <feImage href="#red-rectangle"/>
        </filter>

        <filter id="green-triangle-filter" x="0" y="0" width="1" height="1">
            <feImage href="#green-triangle"/>
        </filter>

        <filter id="blue-triangle-filter" x="0" y="0" width="1" height="1">
            <feImage href="#blue-triangle"/>
        </filter>
    </defs>
    <g>
        <g transform="translate(50, 50)">
            <rect width="100" height="100" style="filter:url(#red-rectangle-filter)"/>
        </g>

        <g transform="translate(200, 50)">
            <rect width="100" height="100" style="filter:url(#green-triangle-filter)"/>
        </g>
        <g transform="translate(350, 50)">
            <rect width="100" height="100" style="filter:url(#blue-triangle-filter)"/>
        </g>
    </g>
</svg>