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@@ -21,6 +21,28 @@ import (
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"github.com/tdewolff/canvas"
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)
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// canvasNativeStroke 判断描边是否仍由Canvas提供,组合几何不改变矢量描边编码
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// 入参: geometry 几何后端
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// 返回: bool 是否采用原生描边
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func canvasNativeStroke(geometry GeometryBackend) bool {
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if combined, ok := geometry.(GGGeometryBackend); ok {
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return canvasNativeStroke(combined.GeometryBackend)
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}
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_, ok := geometry.(CanvasBackend)
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return ok
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}
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// Curves 在输出边界转换椭圆弧,其他曲线保持原样
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// 入参: path 页面路径
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// 返回: GeometryPath 贝塞尔路径, error 路径错误
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func (CanvasBackend) Curves(path GeometryPath) (GeometryPath, error) {
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p, err := geometryToCanvasPath(&path)
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if err != nil {
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return nil, err
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}
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return *geometryFromCanvasPath(p.ReplaceArcs()), nil
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}
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// canvasStrokeOptions 转换Canvas描边样式,虚线由调用方传入
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// 入参: width 描边宽度, cap 线帽, join 连接, tolerance 展开误差
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// 返回: StrokeOptions 公共描边样式
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