The libcaca canvas format (version 1)

struct
{
magic:
   uint8_t caca_header[2];    // "\xCA\xCA"
   uint8_t caca_file_type[2]; // "CV"
canvas_header:
   uint32_t control_size;     // Control size (canvas_data - canvas_header)
   uint32_t data_size;        // Data size (EOF - canvas_data)
   uint16_t version;          // Canvas format version
                              //  bit 0: set to 1 if canvas is compatible
                              //         with version 1 of the format
                              //  bits 1-15: unused yet, must be 0
   uint32_t frames;           // Frame count
   uint16_t flags;            // Feature flags
                              //  bits 0-15: unused yet, must be 0
frame_info:
   struct
   {
      uint32_t width;         // Frame width
      uint32_t height;        // Frame height
      uint32_t duration;      // Frame duration in milliseconds, 0 to
                              // not specify a duration
      uint32_t attr;          // Graphics context attribute
      int32_t cursor_x;       // Cursor X coordinate
      int32_t cursor_y;       // Cursor Y coordinate
      int32_t handle_x;       // Handle X coordinate
      int32_t handle_y;       // Handle Y coordinate
   }
   frame_list[frames];
control_extension_1:
control_extension_2:
   ...
control_extension_N:
   ...                        // reserved for future use
canvas_data:
   uint8_t data[data_size];   // canvas data
data_extension_1:
data_extension_2:
   ...
data_extension_N:
   ...                        // reserved for future use
};