Q: Can I use PDFNet to save off individual PDF pages to 1bit tiff?
Also can I render PDF as CMYK or do color separations ?
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A: PDFNet SDK can be used to render PDF 1-bit monochrome or CMYK
TIFF.
As a starting point, please take a look at PDFDraw sample project
(http://www.pdftron.com/net/samplecode.html#PDFDraw).
To export monochrome, G4 compressed TIFF images you can specify "BPC"
parameter in the optional render 'hints' object. For example:
static ObjSet hint_set = null;
static Obj mono_hint= null;
...
void MyRenderPDF(Page page)
{
...
// Initialize render render hint parameters. There parameters can be
used to control the
// rendering process. In this case we tell the rasterizer to export
the image as
// Obj & ObjSet are located in the pdftron.SDF namespace
if (hint_set == null) {
hint_set = new ObjSet();
// If you would like to render PDF using the monochrome
rasterizer....
mono_hint = hint_set.CreateDict();
mono_hint.PutNumber("BPC", 1);
// If you would like to render PDF using the CMYK rasterizer....
cmyk_hint = hint_set.CreateDict();
cmyk_hint.PutName("ColorSpace", "CMYK");
}
pdfdraw.SetImageSize(1000, 1000);
// Or pdfdraw.SetDPI(200);
pdfdraw.Export(page, "out.tif", "TIF", mono_hint);
}
As of version 4.1 PDFNet will support direct CMYK and DeviceN
rendering besides RGB, Gray, and monochrome rasterizers which are
already available.
A preliminary version that includes CMYK and DeviceN rasterizers is
ready for download (http://www.pdftron.com/IDR_A4985_RP/PDFNet.zip)
The basic use case is illustrated in the following code:
PDFNet.Initialize();
PDFNet.SetResourcesPath("../../../../../resources");
PDFNet.SetColorManagement(true);
PDFNet.SetDefaultDeviceCMYKProfile(input_path +
"USWebCoatedSWOP.icc");
PDFNet.SetDefaultDeviceRGBProfile(input_path + "AdobeRGB1998.icc");
...
draw.Export(page, outname, "TIFF", cmyk_hint);
//--------------------------------
For testing, you can also use the latest pdf2image command-line
utility (http://www.pdftron.com//pdf2image.zip), which includes --cmyk
(or -k) export option. The following pdf2image command-line will
convert 'my.pdf' to CMYK TIFF:
pdf2image --format tiff --cmyk -o OUT my.pdf