Java SVG Salamander 线性渐变未显示

Question

我在应用程序中使用 SVG Salamander，我已经生成了 SVG，但是当它渲染时，“线性渐变”没有显示，元素的内容只是纯黑色。

如果我获取生成的 SVG 并在 Firefox 中打开它，一切都会正确并正确呈现。

SVG:

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r="180" stroke-linecap="round" fill="url(#lamp8rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp8lense" r="170" stroke-linecap="round" fill="url(#lamp8cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp8highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp8spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp8label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 8</text></g><g id="lamp9" transform="translate(1204.0,392.0) scale(0.25)"><title id="lamp9title">Lamp 9</title><circle id="lamp9shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp9outline" r="180" stroke-linecap="round" fill="url(#lamp9rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp9lense" r="170" stroke-linecap="round" fill="url(#lamp9cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp9highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp9spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp9label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 9</text></g><g id="lamp10" transform="translate(1302.0,392.0) scale(0.25)"><title id="lamp10title">Lamp 10</title><circle id="lamp10shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp10outline" r="180" stroke-linecap="round" fill="url(#lamp10rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp10lense" r="170" stroke-linecap="round" fill="url(#lamp10cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp10highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp10spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp10label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 10</text></g><g id="lamp11" transform="translate(1204.0,490.0) scale(0.25)"><title id="lamp11title">Lamp 11</title><circle id="lamp11shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp11outline" r="180" stroke-linecap="round" fill="url(#lamp11rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp11lense" r="170" stroke-linecap="round" fill="url(#lamp11cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp11highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp11spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp11label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 11</text></g><g id="lamp12" transform="translate(1302.0,490.0) scale(0.25)"><title id="lamp12title">Lamp 12</title><circle id="lamp12shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp12outline" r="180" stroke-linecap="round" fill="url(#lamp12rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp12lense" r="170" stroke-linecap="round" fill="url(#lamp12cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp12highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp12spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp12label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 12</text></g><g id="lamp13" transform="translate(1204.0,686.0) scale(0.25)"><title id="lamp13title">Lamp 13</title><circle id="lamp13shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp13outline" r="180" stroke-linecap="round" fill="url(#lamp13rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp13lense" r="170" stroke-linecap="round" fill="url(#lamp13cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp13highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp13spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp13label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 13</text></g><g id="lamp14" transform="translate(1302.0,686.0) scale(0.25)"><title id="lamp14title">Lamp 14</title><circle id="lamp14shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp14outline" r="180" stroke-linecap="round" fill="url(#lamp14rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp14lense" r="170" stroke-linecap="round" fill="url(#lamp14cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp14highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp14spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp14label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 14</text></g><g id="lamp15" transform="translate(196.0,952.0) scale(0.25)"><title id="lamp15title">Lamp 15</title><circle id="lamp15shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp15outline" r="180" stroke-linecap="round" fill="url(#lamp15rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp15lense" r="170" stroke-linecap="round" fill="url(#lamp15cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp15highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp15spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp15label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 15</text></g><g id="lamp16" transform="translate(294.0,952.0) scale(0.25)"><title id="lamp16title">Lamp 16</title><circle id="lamp16shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp16outline" r="180" stroke-linecap="round" fill="url(#lamp16rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp16lense" r="170" stroke-linecap="round" fill="url(#lamp16cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp16highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp16spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp16label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 16</text></g><g id="lamp17" transform="translate(392.0,952.0) scale(0.25)"><title id="lamp17title">Lamp 17</title><circle id="lamp17shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp17outline" r="180" stroke-linecap="round" fill="url(#lamp17rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp17lense" r="170" stroke-linecap="round" fill="url(#lamp17cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp17highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp17spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp17label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 17</text></g><g id="lamp18" transform="translate(490.0,952.0) scale(0.25)"><title id="lamp18title">Lamp 18</title><circle id="lamp18shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp18outline" r="180" stroke-linecap="round" fill="url(#lamp18rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp18lense" r="170" stroke-linecap="round" fill="url(#lamp18cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp18highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp18spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp18label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 18</text></g><g id="lamp19" transform="translate(588.0,952.0) scale(0.25)"><title id="lamp19title">Lamp 19</title><circle id="lamp19shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp19outline" r="180" stroke-linecap="round" fill="url(#lamp19rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp19lense" r="170" stroke-linecap="round" fill="url(#lamp19cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp19highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp19spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp19label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 19</text></g><g id="lamp20" transform="translate(686.0,952.0) scale(0.25)"><title id="lamp20title">Lamp 20</title><circle id="lamp20shroud" r="196" stroke-linecap="round" fill="#212121" cy="196" cx="196" stroke-width="1"/><circle id="lamp20outline" r="180" stroke-linecap="round" fill="url(#lamp20rim)" fill-opacity="0.64" cy="196" cx="196" stroke-width="1"/><circle id="lamp20lense" r="170" stroke-linecap="round" fill="url(#lamp20cap)" cy="196" cx="196" stroke-width="1"/><ellipse id="lamp20highlight" transform="rotate(-40 260 150)" stroke-linecap="round" fill="url(#lamp20spec)" cy="40" cx="180" rx="85" stroke-width="1" ry="60"/><text id="lamp20label" font-size="44pt" text-anchor="middle" font-family="Arial Narrow" y="215" x="196">Lamp 20</text></g></svg>

在浏览器中查看时工作正常:

https://jsfiddle.net/SimonPlatten/kcnz1sn5/1/

但当 SVG Salamander 在 Java 应用程序中渲染时则不然。

Answer 1

已解决:

SVG Salamander 需要将“宽度”和“高度”属性添加到“svg”标签中，一旦添加了这些属性，就会执行渲染，如果没有这些属性，它会显示为我所经历的，当这些时不需要这些属性由网络浏览器呈现。