| PngAlphaSplit |
Splits a PNG’s interleaved color+alpha IDAT data into two independent, ready-to-embed zlib (RFC 1950) streams — a color-only plane and a DeviceGray alpha-only plane — for callers that want to build a PDF color XObject + /SMask pair without doing a full Rgba32 pixel decode. See TrySplit(PngPassthroughInfo, PngAlphaSplitInfo). |
| PngDecoderOptions |
PNG-specific decode options. |
| PngDecodingException |
Thrown when a PNG bitstream cannot be decoded, either because it is malformed or uses an unsupported feature. |
| PngEncoderOptions |
PNG-specific encode options. |
| PngEncodingException |
Thrown when an Image cannot be encoded as PNG. |
| PngFormatException |
Base type for exceptions specific to the PNG codec. |
| PngPassthrough |
Reads a PNG’s IHDR/PLTE/tRNS/iCCP/IDAT chunk data verbatim, with no pixel decode (no inflate of IDAT), for callers that want to re-embed the original compressed pixel stream in another container — e.g. a PDF /FlateDecode image stream, which can consume a PNG’s zlib-compressed IDAT data directly — rather than decode it into an Image and re-encode it. The embedded ICC profile (if any) is inflated, since iCCP’s own compressed form has no equivalent “verbatim” target container. |
| PngTextEntry |
A structured view over a TextRawMetadataProfile, covering PNG’s tEXt/zTXt/iTXt chunks. All three are captured under the single Text kind with Data holding UTF-8 bytes of keyword\0languageTag\0translatedKeyword\0text (language/translated-keyword empty for plain tEXt/zTXt; Latin-1 source text is re-encoded to UTF-8 for a single consistent representation regardless of which chunk type produced it). |
