Hi,
Please test files from
https://issues.apache.org/jira/browse/PDFBOX-1094 to see if this works
for more than one file and if these patterns are at the correct position.
Tilman
On 24.06.2024 20:01, Rich Stafford wrote:
Tilman,
It turns out to be a trivial piece of code to get patterns to render
properly when generating SVG. I had to add a class, 'eqSVGGraphics'
to superclass the SVGGraphics2D module, and then override the
fill(Shape s) method.
I've attached my eqSVGGraphics.java module to show you what I did.
However, to do this, I needed to have the PDFBox TilingPaint module be
public, and be able to access the 'paint' attribute of that class.
I've modified and locally built a download of PDFBox 3.0.2 source for
this. How do I get that mod back into PDFBox?
I'll try your test case with the gradient as well.
Rich Stafford
Chief Scientist
eQuorum Corporation
***
Tilman,
The TIlingPaint object has attributes of a TexturePaint and a
PatternMatrix.
In my case, the TexturePaint has a BufferedImage, and four attributes:
sx, sy (values 0.2439,0.2439) and tx, ty (values 0.0,0.0).
The PatternMatrix is just an identity matrix.
I can get the Rectangle2D for the shape to be painted.
From all of that, what would be the coordinate increments to draw the
image across the shape?
Is there an example in the PDFBox code that draws a pattern when
outputting to renderImageWithDpi()?
Rich
***
Tilman,
Yes, this is the same project from last year. I suspended it in the
interim for other priorities.
It's still a goal for us, SVG is a much better, scalable
representation of many PDF documents. We are getting really close to
having it be a good solution.
I'm going to experiment with doing the pattern across the range block
of the shape. Hopefully that will handle this issue.
Rich
At 08:03 AM 6/24/2024, Tilman Hausherr wrote:
Hi,
TexturePaint is used for patterns, i.e. rectangles that repeat
itself. GetImage() returns a single pattern image. You can test this
by saving that BufferedImage with ImageIO.write() and look what's in it.
About your problem: the cause is either a bug in Batik, or a missing
implementation there, or that it's impossible (does SVG have a
concept about patterns?), or the cause is an old bug in
renderPageToGraphics(), that it fails when there is some sort of
transformation. I don't remember what ticket number it is, but it's
many years old, and we haven't been able to fix it.
Tilman
On 24.06.2024 13:39, Rich Stafford wrote:
I am still working on getting the hatched object in a PDF to render
when generating SVG, using the SVGGraphics2D output, called from the
PDFBox PDFRenderer.renderPageToGraphics() method.
I have subclassed SVGGraphics2D class, specifically the fill(Shape
s) method. For my PDF hatch data, this method is being called with
a PDFBox TilingPaint object. This class is 'private', but for
testing, I've modified it to 'public' to be able to access from my
module.
The TilingPaint object has an AWT 'Paint' member, which is an AWT
'TexturePaint' object. I am able to use it's 'getImage()' method to
access a BufferedImage object.
My question is, what is contained in that BufferedImage object? Does
it contain the same rendered view of the hatched PDF data as I can
see when I generate a full raster view using
PDFRenderer.renderImageWithDPI() method?
Rich
***
At 02:01 AM 6/18/2024, Andreas Lehmkühler wrote:
Hi,
Am 18.06.24 um 01:10 schrieb Rich Stafford:
I have a simplified PDF case that renders (using PDFBox)
differently between JPG and SVG output modes.
PDFBox doesn't have a SVG output mode. I guess you are using some
code/tool from the Apache XMLGraphics project so that you might ask
them for help.
https://xmlgraphics.apache.org/
Andreas
This PDF has a simple line element, and a lime colored rectangle
that is filled with some lime color horizontal lines and shows the
black line behind it.
When rendering to JPG, it matches the input PDF.
When rendered to SVG, the rectangle is filled with opaque black.
I am using PDFBox 3.0.2, and Batik 1.17.
The following link is to an open share of a file 't2.zip. In this
zip is:
t2.pdf the PDF being rendered
t2.jpg the rendered JPG file
t2.svg the rendered SVG file
https://drive.google.com/file/d/1qbuM6O-yNdbr8Ip32q6jp0Z9demfSZBe/view?usp=sharing
Any help or advice would be appreciated!
Rich Stafford
Chief Scientist
eQuorum Corporation
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