12 lines
386 B
JavaScript
12 lines
386 B
JavaScript
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// 全局设置一个唯一离屏的 ctx，用于计算 isPointInPath
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var offScreenCtx = null;
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export function getOffScreenContext() {
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if (!offScreenCtx) {
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var canvas = document.createElement('canvas');
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canvas.width = 1;
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canvas.height = 1;
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offScreenCtx = canvas.getContext('2d');
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}
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return offScreenCtx;
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}
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//# sourceMappingURL=offscreen.js.map
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