Simulate BasicStroke with PDF render

Core Library Questions

arranger

Simulate BasicStroke with PDF render

in Core Library Questions • 1 year ago

HI I am using a Basic Stroke to draw a dotted line along a bezierPath. I cannot export the stroke with a PDF render btw. Which alternatives do I have? How can I get the same result with the PDF render? Or is there a way I can export from java to a pdf file?
I'm attaching a screenshot of what I'm doing (do not mind the cicles).

Replies(4)

PhiLho

Re: Simulate BasicStroke with PDF render

1 year ago

Perhaps you could show a simple code snippet illustrating your problem, as it isn't really clear in the current state of your question.

arranger

Re: Re: Simulate BasicStroke with PDF render

1 year ago

Sorry PhiLo for posting before without answering to you.
In my code I simply used a BasicStroke with dashes set to the current Graphics2D to draw a bezier (using beginShape()/endShape()/bezierVertex()) and I needed to export the image to pdf (so I created a new PGraphics object with the PDF option and drew onto it, but the basicStroke was not applied to the pdf).

In order to accomplish the pdf export I used the hack I posted by using iText directly (I know Processing uses it under the hood to export). But I'm having some issues about the centering of the draw graphics in the page.

arranger

Re: Simulate BasicStroke with PDF render

1 year ago

I'm trying to use the iText lib to export to pdf. This is what I'm doing:

com.lowagie.text.Document document = new com.lowagie.text.Document();
PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(path));
document.open();
PdfContentByte cb = writer.getDirectContent();
PGraphics pg = createGraphics(cWidth + 100, cHeight + 100, JAVA2D);
Graphics2D g2d = cb.createGraphics(cWidth + 100, cHeight + 100);
PGraphicsJava2D pdf = (PGraphicsJava2D)pg;
pdf.g2 = g2d;
pdf.beginDraw();
pdf.smooth();
pdf.background(255);
pdf.noFill();
pdf.stroke(0);
drawPaths(paths, pdf);
drawPoints(pdf);
pdf.endDraw();
g2d.dispose();
document.close();

It happens that I'm actually writing something to a pdf file but I'm not drawing it to the center of the page. Plus I'm not creating a custom pdf with the specified sizes. Any clue?

arranger

Re: Re: Simulate BasicStroke with PDF render

1 year ago

I can answer to myself: the problem is the incorrect initialization of the sizes of the new document:

com.lowagie.text.Document document =
new com.lowagie.text.Document(new com.lowagie.text.Rectangle(width, height));

This shall create a new pdf page with the same sizes of the 'your' sketch : )

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