libcaca-canvas.3caca - Man Page

libcaca-canvas — The libcaca canvas format (version 1)

All types are big endian.

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
};