Maybe it has bug in draw chart line data

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1

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Description

hi, may it exists bug in draw chart series line.
in lv_chart.c file and the func draw_series_line, the 890 line code p2.x = ((w * i) / (chart->point_cnt - 1)) + x_ofs; it required point_cnt should not equal to 1, however, in func lv_chart_set_point_count, the 110 line code if(cnt < 1) cnt = 1;, it may be set 1.

What MCU/Processor/Board and compiler are you using?

What LVGL version are you using?

8.0.1

What do you want to achieve?

What have you tried so far?

Code to reproduce

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2

Looks like a valid bug.

@kisvegabor Since, by definition, there need to be at least 2 points to draw the lines, I think it would make the most sense to just bail out of draw_series_line if chart->point_cnt <= 1. Do you agree?

3

I agree and pushed a fix.