Class for loading Portable Network Graphics Images.
public TPNGFileFormat = class(TNetworkGraphicsFileFormat);
ImagingNetworkGraphics (at line 104)
Loads all types of this image format (all images in png test suite) and saves all types with bitcount >= 8 (non-interlaced only). Compression level and filtering can be set by options interface.
Supported ancillary chunks (loading): tRNS, bKGD (for indexed images transparency contains alpha values for palette, RGB/Gray images with transparency are converted to formats with alpha and pixels with transparent color are replaced with background color with alpha = 0).