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DynaPDF Manual - Page 435

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Function Reference
Page 435 of 750
DestSpace
The destination color space in which all colors should be converted. If
ConvColor is set to false, the value of this member is ignored. If the
destination color space should be DeviceCMYK initialize the members
FillColor and StrokeColor with PDF_CMYK(0,0,0,255); which represents
black.
DeleteKerningAt This member can be used in combination with ReplacePageText().
ReplacePageText() deletes or replaces normally always a complete text
record but this is often not required especially if a text must be deleted or
replaced in the middle or end of a kerning array. To make text replacement
easier it is possible to preserve an arbitrary number of kerning records from
deletion. The value of DeleteKerningAt represents the first array index
which should be deleted. All kerning records above this index will be
deleted too. Take a look into the demo examples/edit_text which is delivered
with DynaPDF to determine how this member can be used.
FontFlags
The font flags describe important characteristics of the current font:
• 0x00001 // Fixed pitch font
• 0x00002 // Serif style
• 0x00004 // Symbol font
• 0x00008 // Script style
• 0x00020 // Non-symbolic font
• 0x00040 // Italic style
• 0x40000 // Force Bold (Type1 fonts only)
External CMaps
A widely used technique to reduce the amount of data that must be stored in a PDF file is the usage
of non-embedded CID fonts. CID fonts, whether embedded or not, can depend on external CMaps
which must be available at runtime.
To process strings of such fonts correctly DynaPDF must be able to load required CMap files if
necessary. Therefore, DynaPDF is delivered with the most important CMap files which are provided
by Adobe Systems. These CMaps can be found in the DynaPDF installation directory at
/Resource/CMap/. Applications which extract text from PDF files should include these CMaps so that
they can be loaded at runtime.
The search path to external CMaps must be set with SetCMapDir() before executing GetPageText()
the first time. The function creates a CMap cache that is hold in memory until the PDF instance will
be deleted. The search path(s) to external CMap files should be set only one time per PDF instance
and one PDF instance should be used to process so many PDF files as possible. This can significantly
improve processing speed.
 

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