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+meta:
+  id: delphi_vcl
+  title: Delphi VCL TComponent serialization
+  file-extension: dfm
+  tags:
+    - serialization
+  license: CC0-1.0
+  endian: le
+doc: |
+  Format used by Delphi (Visual Component Library) to serialize/deserialize
+  TComponent's. One of its notable uses is for storage of GUI forms as
+  resources.
+doc-ref:
+  - https://web.archive.org/web/20151028201608/http://geos.icc.ru:8080/scripts/WWWBinV.dll/ShowR?DFM.rfh
+  - https://gitlab.com/freepascal.org/fpc/source/-/blob/main/rtl/objpas/classes/classes.inc
+seq:
+  - id: header
+    type: header
+  - id: root_object
+    type: object_rec
+types:
+  header:
+    seq:
+      - id: magic1
+        contents: [0xFF]
+      - id: magic2
+        contents: [0x0a, 0x00]
+      - id: resource_name
+        type: strz
+        encoding: ASCII
+      - id: magic3
+        contents: [0x30, 0x10]
+      - id: image_size
+        type: u4
+        valid:
+          expr: "_ < _io.size"
+      - id: filer_signature
+        contents: TPF0
+  string:
+    seq:
+      - id: len_value
+        type: u1
+      - id: value
+        size: len_value
+  value:
+    seq:
+      - id: value_type
+        type: u1
+        enum: value_type
+      - id: value
+        type:
+          switch-on: value_type
+          cases:
+            #value_type::null
+            value_type::list: list_value
+            value_type::int8: u1
+            value_type::int16: u2
+            value_type::int32: u4
+            value_type::extended: extended_value
+            value_type::string: string
+            value_type::ident: string
+            value_type::false: false_value
+            value_type::true: true_value
+            value_type::binary: binary_value
+            value_type::set: set_value
+            value_type::lstring: lstring_value
+            #value_type::nil
+            value_type::collection: collection_value
+            value_type::single: single_value
+            value_type::currency: currency_value
+            value_type::date: date_value
+            value_type::wstring: wstring_value
+            value_type::int64: u8
+            value_type::utf8string: utf8string_value
+  list_value:
+    seq:
+      - id: item
+        type: value
+        repeat: until
+        repeat-until: _.value_type != value_type::null
+  extended_value:
+    seq:
+      - id: value
+        size: 10
+  lstring_value:
+    seq:
+      - id: len_value
+        type: u4
+      - id: value
+        size: len_value
+  false_value:
+    doc: This type is intentionally left blank.
+  true_value:
+    doc: This type is intentionally left blank.
+  binary_value:
+    seq:
+      - id: len_value
+        type: u4
+      - id: value
+        size: len_value
+  set_value:
+    seq:
+      - id: item
+        type: string
+        repeat: until
+        repeat-until: _.len_value == 0x00
+  wstring_value:
+    seq:
+      - id: len_value
+        type: u4
+      - id: value
+        size: 2 * len_value
+  utf8string_value:
+    seq:
+      - id: len_value
+        type: u1
+      - id: value
+        size: len_value
+  collection_rec:
+    seq:
+      - id: value_type1
+        type: u1
+        enum: value_type
+        valid:
+          expr: |
+            (_ == value_type::null) or (_ == value_type::list)
+            or (_ == value_type::int8) or (_ == value_type::int16)
+            or (_ == value_type::int32)
+      - id: int_val
+        type:
+          switch-on: value_type1
+          cases:
+            value_type::int8: u1
+            value_type::int16: u2
+            value_type::int32: u4
+        if: (value_type1 != value_type::null) and (value_type1 != value_type::list)
+      - id: value_type2
+        type: u1
+        enum: value_type
+        valid:
+          expr: _ == value_type::list
+        if: (value_type1 != value_type::null) and (value_type1 != value_type::list)
+      - id: prop_list
+        type: prop_list
+        if: (value_type1 != value_type::null)
+  collection_value:
+    seq:
+      - id: item
+        type: collection_rec
+        repeat: until
+        repeat-until: _.value_type1 == value_type::null
+  single_value:
+    seq:
+      - id: value
+        size: 4
+  currency_value:
+    seq:
+      - id: value
+        size: 8
+  date_value:
+    seq:
+      - id: value
+        size: 8
+  prop_rec:
+    seq:
+      - id: name
+        type: string
+      - id: value
+        type: value
+        if: name.len_value != 0
+  prop_list:
+    seq:
+      - id: item
+        type: prop_rec
+        repeat: until
+        repeat-until: _.name.len_value == 0x00
+  obj_list:
+    seq:
+      - id: item
+        type: object_rec
+        repeat: until
+        repeat-until: _.class_name.len_value == 0x00
+  object_rec:
+    doc: |
+      XXX Filer flags are not implemented
+    seq:
+      - id: class_name
+        type: string
+      - id: object_name
+        type: string
+        if: class_name.len_value != 0x00
+      - id: prop_list
+        type: prop_list
+        if: class_name.len_value != 0x00
+      - id: obj_list
+        type: obj_list
+        if: class_name.len_value != 0x00
+enums:
+  value_type:
+    0: "null"
+    1: "list"
+    2: "int8"
+    3: "int16"
+    4: "int32"
+    5: "extended"
+    6: "string"
+    7: "ident"
+    8: "false"
+    9: "true"
+    10: "binary"
+    11: "set"
+    12: "lstring"
+    13: "nil"
+    14: "collection"
+    15: "single"
+    16: "currency"
+    17: "date"
+    18: "wstring"
+    19: "int64"
+    20: "utf8string"