[Bug] type custom 绘制矩形，数据量大时缩放时会出现颜色变淡，甚至没有颜色的情况

[tantan1]

Version

5.4

Link to Minimal Reproduction

none

Steps to Reproduce

type custom 绘制矩形，数据量大时缩放时会出现颜色变淡，甚至没有颜色的情况

Current Behavior

type custom 绘制矩形，数据量大时缩放时会出现颜色变淡，甚至没有颜色的情况

Expected Behavior

type custom 绘制矩形，不管多少数据颜色不要变淡

Environment

- OS:win10
- Browser: electron 8.5
- Framework: vue

Any additional comments?

No response

[echarts-bot]

@tantan1 It seems you are not using English, I've helped translate the content automatically. To make your issue understood by more people and get helped, we'd like to suggest using English next time. 🤗

TRANSLATED

TITLE

[Bug] type custom draws a rectangle, and when the amount of data is large, the color will fade when zooming, or even no color

[tantan1]

When large data zooms, the rect width will reduce less than 1 pixel, so it fades, we can set the rect width 1 piexl at least, it will show.