FPDF.rect: graphics issues with round corners

[alhman]

When rendering a rect with round corners some graphics issues are visible. See attached pdf at the end.

1. if the border is thicker the inner and outer circles of the corners are not positioned correctly.

2. if there is a background color a small line is visible for each corner.

sample code to generade pdf:

from fpdf import FPDF

if __name__ == "__main__":
    pdf = FPDF()
    pdf.add_page()

    pdf.set_draw_color(0, 0, 0)
    pdf.set_fill_color(255, 255, 255)
    pdf.set_line_width(6)
    pdf.rect(50, 40, 120, 70, style='DF', round_corners=True, corner_radius=12)
    pdf.set_fill_color(230, 120, 125)
    pdf.set_line_width(1)
    pdf.rect(50, 160, 120, 70, style='DF', round_corners=True, corner_radius=12)
    pdf.output("round_corners.pdf")

round_corners.pdf

[Lucas-C]

You are right, this is a graphical bug when using the FPDF.rect() mehod with round_corners=True:

Thank you for the bug report @alhman 👍

This is up-for-grabs for anyone willing to fix this.

[Lucas-C]

@allcontributors please add @alhman for bug

[allcontributors]

@Lucas-C

I've put up a pull request to add @alhman! 🎉

[Ai-Chetan]

@alhman @Lucas-C I'd like to work on this, please assign this issue to me

[Lucas-C]

@Ai-Chetan great, thanks for volunteering 🙂

I assigned this issue to you.

Please report if you have any question.

A good starting point would be our documentation page dedicated to fpdf2 developpers: https://py-pdf.github.io/fpdf2/Development.html

[alhman]

@Lucas-C thanks for your fast reply
@Ai-Chetan thanks for the fast fix
great stuff! 😃