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+meta:
+ id: ico
+ title: Microsoft Windows icon file
+ file-extension: ico
+ endian: le
+ license: CC0-1.0
+doc: |
+ Microsoft Windows uses specific file format to store applications
+ icons - ICO. This is a container that contains one or more image
+ files (effectively, DIB parts of BMP files or full PNG files are
+ contained inside).
+doc-ref: https://msdn.microsoft.com/en-us/library/ms997538.aspx
+seq:
+ - id: magic
+ contents: [0, 0, 1, 0]
+ - id: num_images
+ -orig-id: idCount
+ type: u2
+ doc: Number of images contained in this file
+ - id: images
+ -orig-id: idEntries
+ type: icon_dir_entry
+ repeat: expr
+ repeat-expr: num_images
+types:
+ icon_dir_entry:
+ -orig-id: ICONDIRENTRY
+ seq:
+ - id: width
+ -orig-id: bWidth
+ type: u1
+ doc: Width of image, px
+ - id: height
+ -orig-id: bHeight
+ type: u1
+ doc: Height of image, px
+ - id: num_colors
+ -orig-id: bColorCount
+ type: u1
+ doc: |
+ Number of colors in palette of the image or 0 if image has
+ no palette (i.e. RGB, RGBA, etc)
+ - id: reserved
+ -orig-id: bReserved
+ contents: [0]
+ - id: num_planes
+ -orig-id: wPlanes
+ type: u2
+ doc: Number of color planes
+ - id: bpp
+ -orig-id: wBitCount
+ type: u2
+ doc: Bits per pixel in the image
+ - id: len_img
+ -orig-id: dwBytesInRes
+ type: u4
+ doc: Size of the image data
+ - id: ofs_img
+ -orig-id: dwImageOffset
+ type: u4
+ doc: Absolute offset of the image data start in the file
+ instances:
+ img:
+ pos: ofs_img
+ size: len_img
+ doc: |
+ Raw image data. Use `is_png` to determine whether this is an
+ embedded PNG file (true) or a DIB bitmap (false) and call a
+ relevant parser, if needed to parse image data further.
+ png_header:
+ pos: ofs_img
+ size: 8
+ doc: |
+ Pre-reads first 8 bytes of the image to determine if it's an
+ embedded PNG file.
+ is_png:
+ value: png_header == [137, 80, 78, 71, 13, 10, 26, 10]
+ doc: True if this image is in PNG format.