Version 16.5 of this C API has changed from version 16 as follows:
LEADTOOLS has enhanced the following File format support to improve performance:
DWF (DWF Format): Now adds support for units.
PCT (Macintosh Pict Format): Now adds support for loading QuickTime compressed data.
SVG (Scalable Vector Graphics Format):
Adds handle reference for patterns referenced patterns.
Enhances Text support fixing problems related to positions and alignment.
Enhances clip-path support by fixing problems for clip path in group objects.
Enhances unit support by fixing problems for pen width and insertion point calculations.
Enhances Unicode support by fixing problems for Unicode Chinese characters.
Enhances support for gradient brushes for SVG.
DXF (Drawing Interchange Format):
Adds support for viewing multi-degree spline.
Adds support for units.
Enhances Spline support and making it identical to the one that Autocad render.
Enhances Hatch support by fixing some problems with boundaries for hatch.
Enhances support for viewing model space/paper space.
Enhances support for pen.
DWG (DWG Format):
Adds support for viewing multi-degree spline.
Adds support for units.
Enhances Spline support and making it identical to the one that Autocad render.
Enhances support for ATTDEF and ATTRIB objects which enhance much text support.
Enhances support for UCS.
Enhances Text support, it calculates now the rotation point at which the text should be rotated at.
Enhances Hatch support by fixing some problems with boundaries for hatch.
For more information, refer to: