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Carreau merged 1 commit into from
Dec 6, 2021
Merged

use full-alpha transparency on dvipng rendered LaTeX #13372

Carreau merged 1 commit into from
Dec 6, 2021

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@bnavigator bnavigator commented Dec 4, 2021

From man dvipng (version 1.17):

       -bg color_spec
           Choose background color for the images. This option will be ignored if there is a background color \special in the DVI. The color spec should be in TeX
           color \special syntax, e.g., 'rgb 1.0 0.0 0.0'. You can also specify 'Transparent' or 'transparent' which will give you a transparent background with the
           normal background as a fallback color. A capitalized 'Transparent' will give a full-alpha transparency, while an all-lowercase 'transparent' will give a
           simple fully transparent background with non-transparent antialiased pixels. The latter would be suitable for viewers who cannot cope with a true alpha
           channel.  GIF images do not support full alpha transparency, so in case of GIF output, both variants will use the latter behaviour.

Comparison on a QtConsole with solarized-dark theme (with spyder-ide/qtconsole#512):

In [1]: from control import rss

In [2]: randomstatespace = rss(3,2,1)

In [3]: randomstatespace._repr_latex_()
Out[3]: '\\[\n\\left(\n\\begin{array}{rllrllrll|rll}\n-1.&\\hspace{-1em}79&\\hspace{-1em}\\phantom{\\cdot}&-0.&\\hspace{-1em}279&\\hspace{-1em}\\phantom{\\cdot}&-1.&\\hspace{-1em}77&\\hspace{-1em}\\phantom{\\cdot}&0.&\\hspace{-1em}223&\\hspace{-1em}\\phantom{\\cdot}\\\\\n-0.&\\hspace{-1em}652&\\hspace{-1em}\\phantom{\\cdot}&-1.&\\hspace{-1em}51&\\hspace{-1em}\\phantom{\\cdot}&-1.&\\hspace{-1em}36&\\hspace{-1em}\\phantom{\\cdot}&0.&\\hspace{-1em}128&\\hspace{-1em}\\phantom{\\cdot}\\\\\n0.&\\hspace{-1em}835&\\hspace{-1em}\\phantom{\\cdot}&0.&\\hspace{-1em}181&\\hspace{-1em}\\phantom{\\cdot}&0.&\\hspace{-1em}711&\\hspace{-1em}\\phantom{\\cdot}&-0.&\\hspace{-1em}495&\\hspace{-1em}\\phantom{\\cdot}\\\\\n\\hline\n-0.&\\hspace{-1em}00268&\\hspace{-1em}\\phantom{\\cdot}&-0.&\\hspace{-1em}855&\\hspace{-1em}\\phantom{\\cdot}&0.&\\hspace{-1em}0902&\\hspace{-1em}\\phantom{\\cdot}&-0.&\\hspace{-1em}852&\\hspace{-1em}\\phantom{\\cdot}\\\\\n-0.&\\hspace{-1em}762&\\hspace{-1em}\\phantom{\\cdot}&0.&\\hspace{-1em}0347&\\hspace{-1em}\\phantom{\\cdot}&0.&\\hspace{-1em}472&\\hspace{-1em}\\phantom{\\cdot}&1.&\\hspace{-1em}34&\\hspace{-1em}\\phantom{\\cdot}\\\\\n\\end{array}\\right)\n\\]'
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@Carreau Carreau added this to the 7.31 milestone Dec 6, 2021
@Carreau Carreau force-pushed the latex-png-bg-transparency branch from ea18766 to 3508eed Compare December 6, 2021 18:04
@Carreau Carreau force-pushed the latex-png-bg-transparency branch from 3508eed to eab708f Compare December 6, 2021 18:36
bnavigator
bnavigator commented Dec 6, 2021
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@Carreau Carreau merged commit 74f70ce into ipython:master Dec 6, 2021
meeseeksmachine pushed a commit to meeseeksmachine/ipython that referenced this pull request Dec 6, 2021
@Carreau @meeseeksmachine
Backport PR ipython#13372: use full-alpha transparency on dvipng rend…
c50767f 
…ered LaTeX
@meeseeksmachine meeseeksmachine mentioned this pull request Dec 6, 2021
Merged
Carreau added a commit that referenced this pull request Dec 7, 2021
@Carreau
Merge pull request #13375 from meeseeksmachine/auto-backport-of-pr-13…
2f5df18 
…372-on-7.x

Backport PR #13372 on branch 7.x (use full-alpha transparency on dvipng rendered LaTeX)
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