typedef struct tagPDFCOMPRESSION
} PDFCOMPRESSION, *LPPDFCOMPRESSION;
The PDFCOMPRESSION structure provides information about PDF compression options.
|uStructSize||Size of this structure in bytes, for versioning. Use the sizeof() operator to calculate this value.|
|dwFlags||Flag that indicates which members contain valid data. You can combine values when appropriate by using a bitwise OR ( | ). The following are valid values:|
|PDFCOMP_1BITCOMPTYPE_ENABLED|| The comp1Bit member indicates the compression type to use for 1-bit segments/images.|
|PDFCOMP_2BITCOMPTYPE_ENABLED|| The comp2Bit member indicates the compression type to use for 2-bit segments/images.|
|PDFCOMP_PICTURECOMPTYPE_ENABLED|| The compPicture member indicates the compression type to use for Picture Compression segments/images.|
|comp1Bit||Value that indicates the compression type to use for 1-bit segments/images. For possible values, refer to PDFCOMP_1BITCOMPTYPE.|
|comp2Bit||Value that indicates the compression type to use for 2-bit segments/images. For possible values, refer to PDFCOMP_2BITCOMPTYPE.|
|compPicture||Value that indicates the compression type to use for Picture segments. For possible values, refer to PDFCOMP_PICTURECOMPTYPE.|
|nQFactor||QFactor to used with JPEG Compressions types. For a list of possible values, refer to Compression Quality Factors.|
LPPDFCOMPRESSION is a pointer to a PDFCOMPRESSION structure. Where a function parameter type is LPPDFCOMPRESSION, declare a PDFCOMPRESSION variable and pass the variable's address in the parameter. Declaring an LPPDFCOMPRESSION variable is necessary only if the program requires a pointer.
The comp1Bit, comp2Bit and compPicture members are valid only if the appropriate value is set in dwFlags. This lets you set the compression type for 1-bit segments, for example, without affecting the compression of 2-bit or picture segments.
This structure is used with the L_PdfCompSetCompression function.