syntax = "proto2";
// Very simple proto description of the PNG format,
// described at https://en.wikipedia.org/wiki/Portable_Network_Graphics

message IHDR {
  required uint32 width = 1;
  required uint32 height = 2;
  required uint32 other1 = 3;
  required uint32 other2 = 4;  // Only 1 byte used.
}

message PLTE {
  required bytes data = 1;
}

message IDAT {
  required bytes data = 1;
}

message iCCP  {
  required bytes data = 2;
}

message OtherChunk {
  oneof type {
    uint32 known_type = 1;
    uint32 unknown_type = 2;
  }
  required bytes data = 3;
}

message PngChunk {
  oneof chunk {
    PLTE plte = 1;
    IDAT idat = 2;
    iCCP iccp = 3;
    OtherChunk other_chunk = 10000;
  }
}

message PngProto {
  required IHDR ihdr = 1;
  repeated PngChunk chunks = 2;
}

// package fuzzer_examples;