我无法在 svg 文件中应用所有转换矩阵。如果文件仅包含路径且没有渐变 - 一切正常。但是在将 gradientTransform 添加并应用到 linearGradient 之后会导致渲染错误。
算法:
- 乘组和路径矩阵
- 与链接的线性梯度梯度变换相乘的路径变换
- 将变换应用于路径
- 将 gradientTransform 应用于 linearGradient
输入文件:
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128" xmlns:xlink="http://www.w3.org/1999/xlink">
<defs>
<linearGradient id="linearGradient3755">
<stop offset="0" />
<stop offset="1" stop-opacity="0" />
</linearGradient>
<linearGradient id="linearGradient3761" xlink:href="#linearGradient3755" x1="16.162441" y1="66.128159" x2="117.17769" y2="66.128159" gradientUnits="userSpaceOnUse" />
</defs>
<g transform="translate(0,-924.36218)">
<g transform="matrix(0.95516166,-0.46694301,0.71994792,0.61949768,-706.90347,408.6637)">
<path d="M 2.1428571,3 L 126.07143,3 L 126.07143,123 L 2.1428571,123 z" transform="translate(0,924.36218)" style="fill:#ff0000;fill-opacity:1;stroke:none" />
<path d="M 16.162441,21.428905 L 117.17769,21.428905 L 117.17769,110.8274 L 16.162441,110.8274 z" transform="matrix(0.96592583,-0.25881905,0.25881905,0.96592583,-17.36888,938.82017)" style="fill:url(#linearGradient3761);fill-opacity:1;stroke:none" />
</g>
</g>
</svg>
输出文件:
<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 128 128" xmlns:xlink="http://www.w3.org/1999/xlink">
<defs>
<linearGradient id="linearGradient3755">
<stop offset="0" />
<stop offset="1" stop-opacity="0" />
</linearGradient>
<linearGradient id="linearGradient3761" xlink:href="#linearGradient3755" y1="95.70844949469" x1="26.6443734054997" y2="33.95075671356" x2="101.020294143975" gradientUnits="userSpaceOnUse" />
</defs>
<path fill="#f00" d="M -37.2023,57.8018 C -37.2023,57.8018 81.1699,-.0654 81.1699,-.0654 81.1699,-.0654 167.5631,74.2746 167.5631,74.2746 167.5631,74.2746 49.1909,132.1418 49.1909,132.1418 z" />
<path fill="url(#linearGradient3761)" d="M -15.4903,74.3628 C -15.4903,74.3628 58.8856,12.6051 58.8856,12.6051 58.8856,12.6051 143.155,55.2964 143.155,55.2964 143.155,55.2964 68.7791,117.0541 68.7791,117.0541 z" />
</svg>
我的问题是,当向量相等时,为什么梯度不同?我该如何解决?