PDFlib 8 Windows COM/.NET Tutorial

Using this technique you can make sure that the pages in the generated PDF will have
the exact same page size, cropping are etc. as the pages of the imported document. This
is especially important for prepress applications.
7.3.6 Querying Information about placed Images and PDF Pages
Information about placed images. The info_image( ) function can be used to query image
information. The supported keywords for this function cover general image information
(e.g. width and height in pixels) as well as geometry information related to placing
the image on the output page (e.g. width and height in absolute values after
performing the fitting calculations).
The following code fragment retrieves both the pixel size and the absolute size after
placing an image with certain fitting options:
String optlist = "boxsize={300 400} fitmethod=meet orientate=west";
p.fit_image(image, 0.0, 0.0, optlist);
imagewidth = (int) p.info_image(image, "imagewidth", optlist);
imageheight = (int) p.info_image(image, "imageheight", optlist);
System.err.println("image size in pixels: " + imagewidth + " x " + imageheight);
width = p.info_image(image, "width", optlist);
height = p.info_image(image, "height", optlist);
System.err.println("image size in points: " + width + " x " + height);
Information about placed PDF pages. The info_pdi_page( ) function can be used to query
information about placed PDF pages. The supported keywords for this function cover
information about the original page (e.g. its width and height) as well as geometry information
related to placing the imported PDF on the output page (e.g. width and
height after performing the fitting calculations).
The following code fragment retrieves both the original size of the imported page
and the size after placing the page with certain fitting options:
String optlist = "boxsize={400 500} fitmethod=meet";
p.fit_pdi_page(page, 0, 0, optlist);
pagewidth = p.info_pdi_page(page, "pagewidth", optlist);
pageheight = p.info_pdi_page(page, "pageheight", optlist);
System.err.println("original page size: " + pagewidth + " x " + pageheight);
width = p.info_pdi_page(page, "width", optlist);
height = p.info_pdi_page(page, "height", optlist);
System.err.println("size of placed page: " + width + " x " + height);
198 Chapter 7: Importing Images and PDF Pages (Edition for COM, .NET, and REALbasic)