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我使用fabricjs。我需要更改画布中图像对象的源以将其指向其高分辨率图像而不更改其属性,以便在我使用时canvas.toDataURLWithMultiplier('jpeg', 2)图像质量不会受到影响。
canvas.toDataURLWithMultiplier('jpeg', 2)
请帮我想办法做到这一点。