PDFlib 8 Windows COM/.NET Tutorial

Table 10.2 Operations which must be applied for PDF/X compatibility
item
grayscale color
RGB color
CMYK color
document info keys
PDFlib function and option requirements for PDF/X compatibility
PDF/X-3/4/5: Grayscale images and setcolor( ) with a gray color space can only be used if the output
condition is a grayscale or CMYK device, or if the defaultgray option in begin_page_ext( )
has been set.
PDF/X-3/4/5: RGB images and setcolor( ) with an RGB color space can only be used if the output
condition is an RGB device, or the defaultrgb option in begin_page_ext( ) has been set.
PDF/X-3/4/5: CMYK images and setcolor( ) with a CMYK color space can only be used if the output
condition is a CMYK device, or the defaultcmyk option in begin_page_ext( ) has been set.
The Creator and Title info keys must be set to a non-empty value with set_info( ) or (in PDF/X-4
and PDF/X-5) with the xmp:CreatorTool and dc:title XMP properties in the metadata option of
begin/end_document( )
Prohibited operations. Table 10.3 lists all operations which are prohibited when generating
PDF/X-conforming output. The items apply to all PDF/X conformance levels unless
otherwise noted. Calling one of the prohibited functions while in PDF/X mode will
trigger an exception. Similarly, if an imported PDF page doesn’t match the current PDF/
X conformance level, the corresponding PDI call will fail.
Table 10.3 Operations which must be avoided or are restricted to achieve PDF/X compatibility
item
grayscale color
RGB color
CMYK color
ICC-based color
Lab color
annotations and
form fields
Prohibited or restricted PDFlib functions and options for PDF/X compatibility
PDF/X-1a: the defaultgray option in begin_page_ext( ) must be avoided.
PDF/X-1a: RGB images and the defaultrgb option in begin_page_ext( ) must be avoided.
PDF/X-1a: the defaultcmyk option in begin_page_ext( ) must be avoided.
PDF/X-1a: the iccbasedgray/rgb/cmyk color space in setcolor( ) and the setcolor:iccprofilegray/rgb/cmyk
parameters must be avoided.
PDF/X-1a: the Lab color space in setcolor( ) must be avoided.
Annotations inside the BleedBox (or TrimBox/ArtBox if no BleedBox is present) must be avoided:
create_annotation( ), create_field( ).
file attachments PDF/X-1a/3: begin/end_document( ): option attachments must be avoided; create_annotation( )
with type=FileAttachment must be avoided
actions and
JavaScript
images
transparent images
and graphics
All actions including JavaScript must be avoided: create_action( )
PDF/X-1a: images with RGB, ICC-based, YCbCr, or Lab color must be avoided. For colorized images
the alternate color of the spot color used must satisfy the same conditions.
PDF/X-1 and PDF/X-3: JBIG2 images must be avoided.
The OPI-1.3 and OPI-2.0 options in load_image( ) must be avoided.
PDF/X-1 and PDF/X-3: Soft masks for images must be avoided: the masked option for load_
image( ) must be avoided unless the mask refers to a 1-bit image. Images with implicit transparency
(alpha channel) are not allowed; they must be loaded with the ignoremask option of load_
image( ). The opacityfill and opacitystroke options for create_gstate( ) must be avoided unless
they have a value of 1; if blendmode is used it must be Normal.
Transparent images and graphics are allowed in PDF/X-4 and PDF/X-5.
10.3 PDF/X for Print Production 255