//
// Pure guesswork based on half a dozen preview savegames.
//
Header {
  int08 Signature[8];  // "RISNSG01"
  int32 Version;       // 00000002
  int32 Reserved;      // 00000000
  int32 InfoOffset;    // Header-based offset into uncompressed Buffer
  int32 LayerOffset;   // Header-based offset into uncompressed Buffer
  int32 ObjectOffset;  // Header-based offset into uncompressed Buffer
}
// ZLib-compressed
Buffer {
  // @Header.InfoOffset
  Infos {
    int32 Version;               // 00000002
    int16 NameSize;
    int08 NameData[NameSize];    // Name of the savegame (UTF-16)
    int08 unknown0[12];          // 00 00 00 00 00 00 00 00 00 00 00 00
    int32 reserved;              // (alignment)
    int64 TimeStamp;             // (struct FILETIME)
    int16 WorldSize;
    int08 WorldData[WorldSize];  // Name of the world (ASCII)
    Screenshot {
      int32 Size;  // 00010037
      Data {
        int16 HeaderVersion;  // 0001
        int08 Signature[5];   // "G3IMG"
        int32 Version;        // 00000002
        int32 Width;          // 00000080
        int32 Height;         // 00000080
        int32 Depth;          // 00000000
        int32 CubeMap;        // 00000000 (bool)
        int32 Levels;         // 00000001
        int32 Usage;          // 00000000
        int32 ColorFormat;    // 00000015
        int32 Pool;           // 00000001
        int32 ImageSize;      // 00010000
        int32 unknown;        // 3078C284
        int32 Reserved;       // 00000000
        int08 ImageData[ImageSize];  // (struct RGBQUAD[])
      }
    }
    Stats {
      int32 Size;  // 0000000C
      Data {
        int32 GameTime;  // in seconds
        int32 Flags;     // 1 = Minsky?
        int32 Chapter;   // 1..4
      }
    }
    Objects {
      int32 Count;
      for( Count ) {
        PropertyId {
          int08 Core[16];  // (struct GUID)
          int32 Count;
        }
        int32 DataSize;    // 00000000
      }
    }
  }
  // @Header.LayerOffset
  Layers {
    Header {
      int32 unknown;      // 00000001
      int32 FilesOffset;  // Buffer-based offset
      int32 EmptyOffset;  // Buffer-based offset
      int32 ObjIdOffset;  // Buffer-based offset (00000000)
    }
    Buffer {
      // @Buffer.Layers.Header.ObjIdOffset
      ObjId {
        int08 unknown;  // 01
        int32 Count;
        for( Count ) {
          PropertyId {
            int08 Core[16];  // (struct GUID)
            int32 Count;     // 00000000
          }
        }
      }
      Datas[File.Count] {
        int32 BufferSize;
        int32 ObjectCount;
        BufferData {
          for( ObjectCount ) {
            ObjectId {
              int08 Core[16];  // (struct GUID)
              int32 Count;     // 00000000
            }
            ParentId {
              int08 Core[16];  // (struct GUID)
              int32 Count;     // 00000000
            }
            PropertyId {            // Template/Class/Type?
              int08 UnknownId[16];  // (struct GUID)
              int32 Count;          // 00000000
            }
            int08 unknown;  // 01
            int32 ObjectSize;
            ObjectData {
              int16 unknown0;  // 00D6
              int08 unknown1;
              if( unknown1 ) {
                float unknown0[4][4];  // World matrix? (struct D3DMATRIX)
                float unknown1[4][4];  // Local matrix? (struct D3DMATRIX)
                float unknown2[3];
                float unknown3[3];
                float unknown4[3];
                float unknown5[3];
                float unknown6[3];
                float unknown7[3];
                float unknown8[8];
              }
              int08 PropertyCount;
              for( PropertyCount ) {
                int16 Type;
                int08 Index;
                int32 Size;
                int08 Data[Size];  //TODO: Document property types/data.
              }
            }
          }
        }
      }
      // @Buffer.Layers.Header.EmptyOffset
      Empty {
        int32 unknown;  // 00000000
      }
      // @Buffer.Layers.Header.FilesOffset
      Files {
        int08 Version;  // 01
        int32 Count;
        for( Count ) {
          int16 NameSize;
          int08 NameData[NameSize];  // "*.lrent" (ASCII)
          int32 Offset;              // Buffer-based offset into Datas
        }
      }
    }
  }
  // @Header.ObjectOffset
  Objects {
    int32 Count;
    for( Count ) {
      PropertyId {
        int08 Core[16];  // (struct GUID)
        int32 Count;
      }
      int32 DataSize;
      switch( ObjectId.Core ) {
        default: {
          int08 unknownData[DataSize];  // should be empty
        }
        case "{5FE3F973-A484-40f1-AAEA-C769A2B544ED}": {  // eCWeatherAdmin
          float CurrentDayTime;
          for( 21 ) {
            float unknown1;
            float unknown2;
            float unknown3;
            int16 Name0Size;
            int08 Name0Data[Name0Size];
            int16 Name1Size;  
            int08 Name1Data[Name1Size];
          }
        }
        case "{D60C1968-46D1-4e7f-9304-A4262C05425E}": {  // gCQuestManager
          int08 unknown0[6];  // 03 00 01 00 00 00
          int32 Count;        // 00000172
          for( Count ) {
            int16 NameSize;
            int08 NameData[NameSize];  // (ASCII)
            int08 unknown1[18];
            unknown2 {
              int08 unknown;  // 01
              int32 unknownSize;
              int32 unknownData[unknownSize];
            }
            Infos {
              int08 Version;  // 01
              int32 Count;
              for( Count ) {
                int16 unknown;             // 0001
                int16 NameSize;
                int08 NameData[NameSize];  // "FO_*" (ASCII)
                int16 TextSize;
                int08 TextData[TextSize];  // "INFO_*" (ASCII)
              }
            }
            Links {
              int16 Count;
              for( Count ) {
                int16 NameSize;
                int08 NameData[NameSize];  // NPC name (ASCII)
                int32 unknown;
              }
            }
            unknown3 {
              int08 unknown;  // 01
              int32 unknownSize;
              int32 unknownData[unknownSize];
            }
          }
        }
        case "{2E410075-FEF5-4881-9A9F-69544569B51F}": {  // gCTutorialAdmin
          int08 unknown0[3];  // 01 01 00
          int32 Count;        // 00000027
          for( Count ) {
            int16 NameSize;
            int08 NameData[NameSize];  // (ASCII)
            int08 Value;               // 00 | 01
          }
        }
        case "{C73CC2FB-3743-459c-8F0D-5B23A1869D97}": {  // gCSession
          int08 unknown0[5];   // 04 00 01 00 01
          PropertyId {
            int08 Core[16];   // {C061A561-A862-4092-9D2D-2E55C18627ED} (struct GUID)
            int32 Count;      // 00000000
          }
          int08 unknown2[7];  // 01 00 00 01 00 00 00
          int32 unknown3;     // 00000000 (???) | 00000002 (???)
        }
        case "{9939FCC5-8FC6-4626-B4DD-6546A0B5D95F}": {  // gCInfoModule
          int08 unknown0[2];  // 01 00
          Scripts {
            int32 Count;
            for( Count ) {
              int16 NameSize;
              int08 NameData[NameSize];  // (ASCII)
              int08 unknown0[2];         // 01 00
              int08 unknown1;            // 00 | 01
              int32 unknown2;            // -1 | >= 0
              int08 unknown3;            // 00 | 01
            }
          }
          int08 unknown2[54];  // 00 | 01
          Globals {
            int32 Count;
            for( Count ) {
              int16 NameSize;
              int08 NameData[NameSize];  // (ASCII)
              int32 Value;
            }
          }
          NpcInfo {
            int08 unknown0;  // 00
            int32 Count;
            for( Count ) {
              int08 unknown0[3];  // 01 00 01
              PropertyId {
                int08 Core[16];   // (struct GUID)
                int32 Count;
              }
              int32 unknown2[2];
              int16 NameSize;
              int08 NameData[NameSize];  // "NPCINFO_*" (ASCII)
            }
          }
        }
        case "{f2e3af3b-50f7-4462-9bfe-64174d55a90d}": {  // gCCameraAdmin
          uint32 Version;
          if( Version == 2 ) {
            float Matrix[4][4];
          }
        }
      }
    }
  }
}