.ICO - Microsoft Windows icon
.CUR - Microsoft Windows cursor
- Pixel formats: 1, 4, 8, 24, 32 bits/pixel.
- Compression: Uncompressed, PNG (deflate - used by Windows Vista and later).
- Transparency: For 1, 4, 8 bits/pixel icons, the 'transparency mask' is translated into a transparent color. For 24 bits/pixel icons, the 'transparency mask' is translated into an alpha plane. For 32 bits/pixel icons (used by Windows XP and later), the icon contains an explicit alpha plane instead of mask.
- Notes: Only the largest icon size is read.