折线图使用visualMap时颜色错乱，颜色错位

[dignfei]

Version

5.2.0

Steps to reproduce

可以在这里直接看到能重现的代码和效果：
https://www.makeapie.com/editor.html?c=xbePg5FU6G&v=9
版本https://github.com/apache/echarts/tree/release-dev 修复了这个bug。
但是到了 5.2.0版本这个bug 又出现了。

What is expected?

我使用visualMap的pieces，希望折线图分段显示红色和绿色，

What is actually happening?

在折线拐弯的地方，颜色会错乱，红色的折线两端会有一部分绿色，绿的折线两端会有一部分红色

---

在chrome浏览器访问时会发生这种情况，如果chrome中设置关闭硬件加速，则可以正常显示。
可以在这里直接看到效果
https://www.makeapie.com/editor.html?c=xbePg5FU6G&v=9

[echarts-bot]

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[echarts-bot]

@dignfei It seems you are not using English, I've helped translate the content automatically. To make your issue understood by more people, we'd like to suggest using English next time. 🤗

TRANSLATED

TITLE

When using visualMap for line graph, the colors are out of order and the colors are out of place

BODY

Version

5.2.0

Steps to reproduce

You can directly see the reproducible code and effect here:
https://www.makeapie.com/editor.html?c=xbePg5FU6G&v=9
Version https://github.com/apache/echarts/tree/release-dev fixes this bug.
But this bug appeared again in version 5.2.0.

What is expected?

I use visualMap pieces, and I want the line graph to show red and green in segments,

What is actually happening?

Where the polyline turns, the color will be messy. The red polyline will have a part of green at both ends, and the green polyline will have a part of red at both ends.

---

This happens when the chrome browser is accessed. If the hardware acceleration is turned off in chrome, it can be displayed normally.
You can see the effect directly here
https://www.makeapie.com/editor.html?c=xbePg5FU6G&v=9

[yanqiqi1996]

@dignfei 这个问题你解决了吗

[dignfei]

@dignfei 这个问题你解决了吗

这个版本https://github.com/apache/echarts/tree/release-dev 修复了这个bug，直接下载源代码覆盖即可