Xojo Developer Conference
25/27th April 2018 in Denver.
MBS Xojo Conference
6/7th September 2018 in Munich, Germany.

DynaPDF Manual - Page 21

Previous Page 20   Index   Next Page 22

Custom library changes
Page 21 of 750
Custom Library Changes
This section is only of interest if you have a copy of the source codes. If you use a version without
source codes you can skip this chapter.
Compiler Switches
DynaPDF supports several compiler switches to disable unnecessary features. The following
macros disable or enable one of the image libraries used by DynaPDF as well as other features.
The macros are defined in the header file /main/drv_type.h.
1 // AES encryption and decryption
1 // about 150 KB (CJK to Unicode conversion)
1 // EMF Converter
1 // about 1 KB
1 // about 50 KB (PDF import)
#define DRV_SUPPORT_JP2K 1 // about 180 KB
#define DRV_SUPPORT_JPEG 1 // about 90 KB (no effect if TIFF is enabled)
1 // PBM, PGM, PNM, PPM Image formats, ~1 KB
1 // about 100 KB
1 // about 1 KB
1 // RC4 encryption and decryption
#define DRV_SUPPORT_SIGN 1 // Self sign signatures -> AiCrypto Library
#define DRV_SUPPORT_TIFF 1 // about 310 KB
To disable a specific feature set the constant to zero. Note that the TIFF library uses also the JPEG
library. Because of this, disabling the JPEG library only does not reduce the library size.
The following constants are used by WriteFText() (defined in dynapdf.h).
// Maximum count of nested list levels
#define PDF_LIST_SEP_WIDTH 10.0 // Default list separator with
// Default list character
#define PDF_LIST_FONT "Wingdings-Regular" // Default list font
The list font must be the PostScript name of the font (see SetFont() for further information). When
changing the list font you may also change the default list character. When using DynaPDF under
Linux or UNIX you may define a font that is available in one of your font search directories.
Note that the list font can be overridden at runtime with the function SetListFont(). So, it is
usually better to load the font at runtime with SetListFont() since you can properly handle cases
in which the font cannot be found.
Main object types
In PDF, two basic object types can be created, resource objects such as fonts, images and so on
which are used by content streams and global objects such as annotations, bookmarks, form
fields and so on. Global objects can use resource objects but not vice versa.

Previous topic: Customized Exception handling

Next topic: General design requirements