Thread: Backport request for 6.0.4 release version

Dear Ethan,

I would like to request a backport to the 6.0.4 release.

I have observed differences in polygon color rendering between the
development version and previous release versions (including
6.0.4-testing). The development version renders polygons with the intended
colors, while the release versions render them with different colors.

The following script demonstrates the issue:
```
set xrange [-2:2]
set yrange [-2:2]
set zrange [-2:2]

$contour <<EOD
-1 -1 0
-1  1 0
 1  1 0
 1 -1 0
-1 -1 0
EOD

set style line 3 lc "#d000ff00"
set key noautotitle
set isotropic
set xyplane 0
set view ,,1.6


set multiplot layout 2,2

  # plot 1 : filled in "Red" with "Blue" border
  set title "Plot 1"
  splot $contour using 1:2:3 with polygons fillstyle border lc "blue" fc
rgb "red"

  # plot 2 : filled in pallete color with default border
  set title "Plot 2"
  splot $contour using 1:2:3 with polygons fillstyle fc palette

  # plot 3 : filled in transparent default color with "Black" border
  set title "Plot 3"
  splot $contour using 1:2:3 with polygons fillstyle transparent border lc
black

  # plot 4 : filled in transparent "Green" color with default border
  set title "Plot 4"
  splot $contour using 1:2:3 with polygons ls 3

unset multiplot

pause -1
```

If the fix for this issue in the development version is sufficiently
stable, I would greatly appreciate its backport to the 6.0.4 release, even
if only for some of the cases rather than all of them.

Thank you for your consideration.

Best regards,
H. Motoyoshi

On Tuesday, 9 December 2025 15:20:28 PST sfhm wrote:
> Dear Ethan,
> 
> I would like to request a backport to the 6.0.4 release.
> 
> I have observed differences in polygon color rendering between the
> development version and previous release versions (including
> 6.0.4-testing). The development version renders polygons with the intended
> colors, while the release versions render them with different colors.

[snip example] 

> If the fix for this issue in the development version is sufficiently
> stable, I would greatly appreciate its backport to the 6.0.4 release, even
> if only for some of the cases rather than all of them.

Unfortunately, that is not a trivial change.  

The code that deals with how fill color and border color are specified,
stored, and eventually applied to graphical elements in the plot has
diverged between 6.0 and the development branch.

A partial list of relevant commits in 6.1 that do not apply cleanly to 6.0
	c92721 fc9818 

Nevertheless, it is possible that the specific cases of "splot with polygons"
in your test script could be handled either by some subset of the changes
currently in the development branch or by some ad hoc fixes for 6.0.
The trick is not to break anything else.

I will look into it, but no promises about 6.0.4.  

 Ethan

Dear Ethan,

I can confirm that all four issues in the test script have been resolved
with commit [4d3398fdd] to branch-6.0-stable.
Thank you very much for taking the time to backport this non-trivial fix.

Best regards,
H. Motoyoshi

On Thu, Dec 11, 2025 at 8:17 AM Ethan A Merritt <me...@uw...> wrote:

> On Tuesday, 9 December 2025 15:20:28 PST sfhm wrote:
> > Dear Ethan,
> >
> > I would like to request a backport to the 6.0.4 release.
> >
> > I have observed differences in polygon color rendering between the
> > development version and previous release versions (including
> > 6.0.4-testing). The development version renders polygons with the
> intended
> > colors, while the release versions render them with different colors.
>
> [snip example]
>
> > If the fix for this issue in the development version is sufficiently
> > stable, I would greatly appreciate its backport to the 6.0.4 release,
> even
> > if only for some of the cases rather than all of them.
>
> Unfortunately, that is not a trivial change.
>
> The code that deals with how fill color and border color are specified,
> stored, and eventually applied to graphical elements in the plot has
> diverged between 6.0 and the development branch.
>
> A partial list of relevant commits in 6.1 that do not apply cleanly to 6.0
>         c92721 fc9818
>
> Nevertheless, it is possible that the specific cases of "splot with
> polygons"
> in your test script could be handled either by some subset of the changes
> currently in the development branch or by some ad hoc fixes for 6.0.
> The trick is not to break anything else.
>
> I will look into it, but no promises about 6.0.4.
>
>  Ethan
>
>
>