Legacy ImageMagick Discussions Archive

convert a.svg b.png

Works well enough, but the "a" image ends on a background - is there a way to retain the transparency from the svg in the png file?

How about
convert -background none a.svg b.png

See http://www.imagemagick.org/Usage/draw/#svg

whugemann wrote:How about
convert -background none a.svg b.png

See http://www.imagemagick.org/Usage/draw/#svg

Its still on a white background alas.

IM 6.7.0.10 Q16 Mac OSX Tiger

I took the following SVG code from http://www.w3.org/TR/SVG/shapes.html#RectElement and saved it as test.svg

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN"
"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="12cm" height="4cm" viewBox="0 0 1200 400"
xmlns="http://www.w3.org/2000/svg" version="1.1">
<desc>Example rect01 - rectangle with sharp corners</desc>

<!-- Show outline of canvas using 'rect' element -->
<rect x="1" y="1" width="1198" height="398"
fill="none" stroke="blue" stroke-width="2"/>

<rect x="400" y="100" width="400" height="200"
fill="yellow" stroke="navy" stroke-width="10" />
</svg>

When I do:


convert test.svg test.png
or
convert test.svg -channel rgba -alpha on test.png
or
convert test.svg -background none test.png
or
convert test.svg PNG32:test.png
or
convert test.svg -define png:color-type=6 test.png
or
convert test.svg test.gif
or
convert test.svg test.tif


I get a white background also.

However, when I do

convert -background none test.svg test.png

Then the yellow inner rectangle and the transparent outer rectanger are both transparent and only the blue outlines show.


I am not an expert on SVG files. But I am using RSVG which should be better that SVG.

convert -list format

SVG SVG rw+ Scalable Vector Graphics (RSVG 2.32.1)




P.S I opened test.svg in GIMP and saved it as PNG (making sure to save the background as is -- checkbox). The PNG file created had a proper yellow rectangle inside a transparent rectangle, both with blue borders.

So it would seem that one needs to somehow tell IM to preserve the background from the svg file. But I don't know how one would do that. I would assume that would be automatic/default?


So I don't know enough about SVG files to know if this is user error or a bug. But it would appear to me to be a bug.

I took http://upload.wikimedia.org/wikipedia/c ... RAID_5.svg for my testing and arrived at a transparent background.

The difference to Fred's SVG is that "my" SVG defines a transparent page as a background, whereas Fred's small SVG example defines the "page" by a transparent rectangle, so it's no "background". Fred's page rectangle is however transparent ("fill none") and seems to be not redered correctly by IM's import filters.