Yes actually there is a lot more to the story. I'm not
using the rasterizer, I'm using the transcoder.
I am getting the rect width from the doc which is 612.
I need to scale the image down to 500 width so I get the "scale factor" = 500/612 = .817
Hmm is there a reason that using the 'viewBox' attribute on the outermost SVG wouldn't do what you want? (auto scale to fit viewing conditions).
The code looks reasonable.
Now when I view the image in an applet using awt, I
capture some elementary mouse events. When I place
the mouse pointer on the upper-leftmost corner of the
upper-leftmost text letter in the awt image, I get a Y
coord of about 61. Now when we look at the svg code
the uppermost text is positioned at about 84 and with
the scaleFactor, it translates to about 69. It is off
by 69-61 = 8 pixels.
How certain are you that you are properly interpreting the mouse coords? Does the error seem to 'scale' so it's larger at the right/bottom compared with left/top?
I think you are right and I am probably using the
transcoding process wrong, but I'm not sure what to
do...
I would try using viewBox rather than mucking with the AOI.
Thanks for your help with this.
--- Thomas DeWeese <[EMAIL PROTECTED]> wrote:
Guess Who wrote:
David? :)
I'm having a little trouble with images that were transcoded with batik. In particular, I'm working with svg documents that contain almost all text elements. When the doc is transcoded into an
image,
coords of the text that appears in the image don't seem to correspond with the coords specified in
the
svg doc.
I've already taken into account the aspectratio in
testing the coords' congruency.
Aspectratio = imgwidth/svg:aoiwidth
Actually the proper name for this is the 'scale factor'. The Aspect ratio is typically the width/height (or vice versa).
the aoi that i'm using is the rect element just
inside
the page group.
Well that is the same as the default area of the SVG so the scale factor here should be 1 (as is when I tested it).
For instance, xcoord:image = xcoord:svgdoc * aspectratio
Correct me if I am wrong about the above calcs.
Here
is the svg doc...
In the future using an attachment works much better as often things get munged by line-wrapping. Also how are you generating the image? When I use the svgrasterizer I get text exactly where I think it should be:
./build.sh svgrasterizer -a 0,0,612,792 text.svg
But since your image seems to be scaled somehow I must assume you are not using the default w/h for rendering.
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