TIEGlobalSettings.PNGEngine

Declaration

property PNGEngine: TIEImagingEngine;

Description

Specifies which engine is used to load and save PNG format images.

Property	Description
ieenAuto	Automatically chooses ieenDLL if a DLL is found in the EXE folder, otherwise ieenNative (32bit) or ieenWIC (64bit)
ieenNative	Uses native loading code (32bit only)
ieenDLL	Uses an ImageEn DLL to support the file format. This option gives the best performance and functionality, including Apple CgBI format and better support for PNG text fields
ieenWIC	Uses the WIC API (Windows Imaging Component). Some meta-data is not supported. You cannot save to the following pixel formats: ie8p, ie32f, ieCIELab
ieenLegacy	N/A

Note:
◼ ieenDLL requires you to ship the IELib or IEVision DLL with your application
◼ With ieenAuto, only the EXE folder is searched for relevant DLLs. For ieenDLL, the system path is also checked (or explicitly call RegisterPlugins)
◼ ieenWIC is not recommended when loading PNG images from offset positions in streams

Default: ieenAuto (which uses ieenDLL if a DLL is available, otherwise ieenNative in 32bit apps or ieenWIC in 64bit apps)

Engine Performance

Demo

Demos\InputOutput\IEViewPerformance\Performance.dpr

Example

// Use WIC to load PNG images
IEGlobalSettings().PNGEngine := ieenWIC;

// Force use of IELib DLL for improved performance
// ImageEn will attempt to load the DLL even if it's not in the EXE folder. If the DLL is not found or is outdated, an error will be raised
IEGlobalSettings().JPEGEngine := ieenDLL;
IEGlobalSettings().PNGEngine := ieenDLL;
IEGlobalSettings().JPEG2000Engine := ieenDLL;
IEGlobalSettings().CameraRawEngine := ieenDLL;

TIEGlobalSettings.PNGEngine