PdfContentByte cb = writer.getDirectContent();
//IIRC, the directContent is from the current page, so you'll be drawing all
your
// importedPages onto the first page.
for (InputStream input : inputStreams) {
PdfReader reader = new PdfReader(input);
for (int x=1; x<= reader.getNumberOfPages(); x++) {
doc.newPage();
PdfImportedPage page = writer.getImportedPage(reader, x);
//determine if the page needs to be rotated
int rotation = reader.getPageRotation(x);
if (rotation == 90 || rotation == 270)
{
cb.addTemplate(page, 0,-1f, 1f, 0, 0,
reader.getPageSizeWithRotation(x).getHeight());
} else {
cb.addTemplate(page, 1f, 0, 0, 1f, 0, 0);
}
Incidentally, this really isn't the way to go with rotated pages. You're
rotating 90 & 270 the same, and ignoring the never-actually-seen-one freak
occurrence of a page rotate 180.
IIRC, it'd be more like:
float theta = degToRad( rotation );
float cosTheta = cos( theta );
float sineTheta = sine( theta );
float xOffset = cosTheta * origWid + signTheta * origHei;
float yOffset = cosTheta * origHei - signTheta * origWid;
cb.addTemplate( page, cosTheta, -1.0f * cosTheta, sineTheta, cosTheta,
xOffset, yOffset );
I'm none to sure about the x & y offsets. I hand-executed this stuff for 0,
90,180,270... IN THEORY, this is correct. You could probably goodle up a
more authoritative version.
Oh, and you need to modify the page sizes to match your output sizes:
And you're assuming that the page's bounding boxes are [ 0 0 Wid Hei ].
That's not always the case either. You'd need to throw the actual page
origin (coordinates of the lower left corner) into the X & Y offsets you
calculate.
OR you could do it the easy way. Set up the new page to have exactly the
same rotation and bBox as the source page. Then the PDF viewer (Reader,
ghostView, whatever) will do the work for you:
PdfImportedPage page = writer.getImportedPage( reader, x );
Rectangle newPageRect = reader.getPageSize( x );
// YUCK. You can't directly set a Rectangle's rotation. Here's a hack
that'll get you there
for( int i = reader.getPageRotation(x); i > 0; i-= 90) {
newPageRect.rotate();
}
doc.setPageSize( newPageRect );
doc.newPage();
cb = writer.getDirectContent();
cb.addTemplate( page );
I'm not sure any of that will fix the bug you're facing, but it sure will
fix some bugs you haven't run into yet.
--
--Mark Storer
PDF Guy
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