Portable Network Graphics Formats (PNG and MNG)

LEADTOOLS reads and writes the following Portable Network Graphics formats:

PNG (Portable Network Graphics)

Is a replacement for the GIF format. It is a full-featured (non-LZW) compressed format intended for widespread use without legal restraints.

LEADTOOLS supports reading  and writing PNG 1+1 files.

LEADTOOLS supports reading (but not writing) interlaced PNG files. To implement the paint-while-load feature, set the LOADFILEOPTION. structure's Passes field to paint the image in more than one pass. Passes

You can read the following bits per pixel: 1, 4, 8, 16, 24, 32, 48, 64.

You can write the following bits per pixel: 1, 4, 8, 24, 32, 48, 64.

The file constant associated with this file format is:

Constant Read Support (BPP) Write Support (BPP) Description
FILE_PNG 1, 4, 8, 16, 24, 32, 48, 64 1, 4, 8, 24, 32, 48, 64 [75] Portable Network Graphics (PNG).

MNG (Multiple-image Network Graphics)

Is a raster format was developed in PNG development group and supported by IrfanView, XnView, and ImageConverter. It is a member of the PNG (Portable Network Graphics) format family. It can contain animations, slide shows, complex still frames, comprised of multiple PNG or JNG single-image datastreams.

LEADTOOLS supports progressive reading and writing MNG files, multi-page files (adding, replacing, inserting, and appending), and Lossless JPEG compression. The default extension is MNG.

LEAD supports version 1.0 of this format.

You can read the following bits per pixel: 24.

You can write the following bits per pixel: 1, 2, 4, 8, 16, 24, 32, 48, and 64.

It is possible to speed up the loading of large PNG and MNG files. For more information, refer to Using Filter Data to Speed up Loading Large Files.

For more information on the format, refer to http://www.libpng.org/pub/mng/spec/.

The file constants associated with these file formats are:

Constant Read Support (BPP) Write Support (BPP) Description
FILE_MNG 24 1, 2, 4, 8, 24, 32, 48, 64 [327] Multiple-image Network Graphics (MNG).
FILE_MNG_GRAY 24 1, 2, 4, 8, 16 [329] Multiple-image Network Graphics (MNG) Grayscale.
FILE_MNG_JNG 24 8, 24 [330] Multiple-image Network Graphics (MNG) JNG format.
FILE_MNG_JNG_411 24 24 [331] Multiple-image Network Graphics (MNG) JNG format with JPEG 4:2:2 Compression.
FILE_MNG_JNG_422 24 24 [332] Multiple-image Network Graphics (MNG) JNG format with JPEG 4:1:1 Compression.

NOTE: MNG file format is based in part on libmng library. MNG file format is based in part on the work of the Independent JPEG Group.

Required DLLs and Libraries

Required DLLs and Libraries

Platforms

Win32, x64, Linux.

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LEADTOOLS Raster Imaging C API Help