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https://issues.apache.org/jira/browse/PDFBOX-4583?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16877039#comment-16877039
]
Jan Buschtöns commented on PDFBOX-4583:
---------------------------------------
{code:java}
public void paint(final Graphics g) {
final Graphics2D g2 = (Graphics2D) g;
try {
final int r = 20;
final double scale = 1.1;
final AffineTransform transform = g2.getTransform();
transform.scale(scale, scale);
g2.setTransform(transform);
final Rectangle rectangle = new Rectangle(r, r);
g2.clip(rectangle);
g2.setColor(Color.WHITE);
g2.fill(rectangle);
final PDDocument pdDocument =
PDDocument.load(App.class.getResourceAsStream("/de/abm/bug/x.pdf"));
final PDFRenderer pdfRenderer = new
org.apache.pdfbox.rendering.PDFRenderer(pdDocument);
pdfRenderer.renderPageToGraphics(0, g2);
g2.setTransform(transform);
g2.setColor(Color.black);
g2.drawRect(0, 0, r, r);
} catch (final IOException e) {
throw new RuntimeException(e);
}
}
}
{code}
I added a transformation that scales. For scale 1.001 I an see the sqare, for
1.01 I see half a square, for 1.1 I see nothing.
> Drawing only a portion of a PDF (Graphics.clip is ignored/overwritten)
> ----------------------------------------------------------------------
>
> Key: PDFBOX-4583
> URL: https://issues.apache.org/jira/browse/PDFBOX-4583
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 2.0.15
> Reporter: Jan Buschtöns
> Assignee: Tilman Hausherr
> Priority: Major
> Fix For: 2.0.17, 3.0.0 PDFBox
>
> Attachments: clip_PDFBox_FORMGEN-2184-master.zip
>
>
> I want to use PDFBox to draw PDFs in a swing application.
> I want to draw only a portion of the PDF. As far as I know, the way to do
> this in swing is with the "clip"-method on the Graphics object. However, no
> matter what clip I set, the whole PDF is drawn.
> PDFRenderer calls "setClip", when it probably should use "clip". The latter
> sets the current clip to the intersection of the old current clip and the
> provided shape, whereas the former resets the current clip
> I've attached an example maven project, but the gist is:
> {code:java}
> @Override
> public void paint(final Graphics g) {
>
> final Graphics2D g2 = (Graphics2D) g;
> try {
> PDDocument pdDocument =
> DDocument.load(App.class.getResourceAsStream("somepdf.pdf"));
> g2.clip(new Rectangle(20, 20));
> final PDFRenderer pdfRenderer = new
> org.apache.pdfbox.rendering.PDFRenderer(pdDocument);
> pdfRenderer.renderPageToGraphics(0, g2);
> } catch (final IOException e) {
> throw new RuntimeException(e);
> }
> }
> {code}
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