Hi Jonathan,
The reason the text is blowing up is because the default Font size in Batik
is 9pt. So the font size is multiplied by the pixels/pt. Also note that your
top level SVG elements are defined in pixels rather than in real world units so
the -dpi 600 doesn't actually make your output images any better. You might
consider either moving to real world units for the root SVG element or use the
-width option to produce a larger output image rather than -dpi.
You can fix the font-size issue by adding font-size="9".
Thomas
On Oct 23, 2012, at 12:56 AM, Jonathan Dagresta <[email protected]> wrote:
> One of our customers is complaining that when the use the rasterizer with
> –dpi 600 to create 600 DPI jpeg files from SVG’s, with some SVG files the
> text of the image “blows up” to a very large size compared to the default 96
> DPI result and compared to the other drawn parts of the image.
>
> Attached are two SVG files, image1.svg which does not manifest this problem
> and image2.svg which does show this problem.
>
> Attached are four JPG files (commands below used to create them):
>
> image1-096dpi.jpg (image1.svg converted to default 96 DPI JPEG)
> image1-600dpi.jpg (image1.svg converted to 600 DPI JPEG – text in image does
> not “blow up”)
> image2-096dpi.jpg (image2.svg converted to default 96 DPI JPEG)
> image2-600dpi.jpg (image2.svg converted to 600 DPI JPEG – text in image
> clearly does “blow up” to relatively large size)
>
> BATIK 1.7
> JAVA 1.5
>
> java -mx128m -jar batik-1.7/batik-rasterizer.jar -m image/jpeg -q .99
> -d image1-096dpi.jpg image1.svg
> java -mx128m -jar batik-1.7/batik-rasterizer.jar -m image/jpeg -q .99 -dpi
> 600 -d image1-600dpi.jpg image1.svg
> java -mx128m -jar batik-1.7/batik-rasterizer.jar -m image/jpeg -q .99
> -d image2-096dpi.jpg image2.svg
> java -mx128m -jar batik-1.7/batik-rasterizer.jar -m image/jpeg -q .99 -dpi
> 600 -d image2-600dpi.jpg image2.svg
>
> What seems a significant difference in image2.svg is that most of the text
> elements do not specify font-size, while all of the text elements in
> image1.svg do specify the font-size value.
>
> So the question we have: Is the 600 DPI result of image2.svg => JPEG where
> the relative size of the text in the image “blows up” an expected result due
> to the text elements not specifying the font-size value, or is this a bug in
> the rasterizer?
>
> <image2-600dpi.jpg><image2.svg><image1-096dpi.jpg><image1-600dpi.jpg><image1.svg><image2-096dpi.jpg>
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