Display Filter Reference: Portable Network Graphics

Protocol field name: png

Versions: 1.0.0 to 2.6.3

Back to Display Filter Reference

Field name Description Type Versions
png.bkgd.blue Blue Unsigned integer, 2 bytes 1.0.0 to 2.6.3
png.bkgd.green Green Unsigned integer, 2 bytes 1.0.0 to 2.6.3
png.bkgd.greyscale Greyscale Unsigned integer, 2 bytes 1.0.0 to 2.6.3
png.bkgd.palette_index Palette Index Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.bkgd.red Red Unsigned integer, 2 bytes 1.0.0 to 2.6.3
png.chrm.blue.x Blue X Floating point (single-precision) 1.12.0 to 2.6.3
png.chrm.blue.y Blue Y Floating point (single-precision) 1.12.0 to 2.6.3
png.chrm.green.x Green X Floating point (single-precision) 1.12.0 to 2.6.3
png.chrm.green.y Green Y Floating point (single-precision) 1.12.0 to 2.6.3
png.chrm.red.x Red X Floating point (single-precision) 1.12.0 to 2.6.3
png.chrm.red.y Red Y Floating point (single-precision) 1.12.0 to 2.6.3
png.chrm.white.x White X Floating point (single-precision) 1.12.0 to 2.6.3
png.chrm.white.y White Y Floating point (single-precision) 1.12.0 to 2.6.3
png.chunk.crc CRC Unsigned integer, 4 bytes 1.0.0 to 2.6.3
png.chunk.data Data Label 1.0.0 to 2.6.3
png.chunk.flag.ancillary Ancillary Boolean 1.0.0 to 2.6.3
png.chunk.flag.private Private Boolean 1.0.0 to 2.6.3
png.chunk.flag.stc Safe To Copy Boolean 1.0.0 to 2.6.3
png.chunk.len Len Unsigned integer, 4 bytes 1.0.0 to 2.6.3
png.chunk.type Chunk Character string 1.0.0 to 2.6.3
png.chunk_too_large chunk size too large, dissection of this chunk is not supported Label 1.12.0 to 2.6.3
png.gama.gamma Gamma Floating point (single-precision) 1.12.0 to 2.6.3
png.ihdr.bitdepth Bit Depth Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.ihdr.colour_type Colour Type Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.ihdr.compression_method Compression Method Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.ihdr.filter_method Filter Method Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.ihdr.height Height Unsigned integer, 4 bytes 1.0.0 to 2.6.3
png.ihdr.interlace_method Interlace Method Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.ihdr.width Width Unsigned integer, 4 bytes 1.0.0 to 2.6.3
png.phys.horiz Horizontal pixels per unit Unsigned integer, 4 bytes 1.0.0 to 2.6.3
png.phys.unit Unit Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.phys.vert Vertical pixels per unit Unsigned integer, 4 bytes 1.0.0 to 2.6.3
png.signature PNG Signature Sequence of bytes 1.0.0 to 2.6.3
png.srgb.intent Intent Unsigned integer, 1 byte 1.12.0 to 2.6.3
png.text.keyword Keyword Character string 1.0.0 to 2.6.3
png.text.string String Character string 1.0.0 to 2.6.3
png.time.day Day Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.time.hour Hour Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.time.minute Minute Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.time.month Month Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.time.second Second Unsigned integer, 1 byte 1.0.0 to 2.6.3
png.time.year Year Unsigned integer, 2 bytes 1.0.0 to 2.6.3
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