NAME

       SDL_Overlay - YUV video overlay

STRUCTURE DEFINITION

       typedef struct{
         Uint32 format;
         int w, h;
         int planes;
         Uint16 *pitches;
         Uint8 **pixels;
         Uint32 hw_overlay:1;
       } SDL_Overlay;

STRUCTURE DATA

       format              Overlay format (see below)

       w, h                Width and height of overlay

       planes              Number of planes in the overlay. Usually either 1 or 3

       pitches             An  array of pitches, one for each plane. Pitch is the length of a row
                           in bytes.

       pixels              An array of pointers to teh data of each plane. The overlay should  be
                           locked before these pointers are used.

       hw_overlay          This will be set to 1 if the overlay is hardware accelerated.

DESCRIPTION

       A  SDL_Overlay  is similar to a SDL_Surface except it stores a YUV overlay. All the fields
       are read only, except for pixels which should be  locked  before  use.  The  format  field
       stores the format of the overlay which is one of the following:

       #define SDL_YV12_OVERLAY  0x32315659  /* Planar mode: Y + V + U */
       #define SDL_IYUV_OVERLAY  0x56555949  /* Planar mode: Y + U + V */
       #define SDL_YUY2_OVERLAY  0x32595559  /* Packed mode: Y0+U0+Y1+V0 */
       #define SDL_UYVY_OVERLAY  0x59565955  /* Packed mode: U0+Y0+V0+Y1 */
       #define SDL_YVYU_OVERLAY  0x55595659  /* Packed mode: Y0+V0+Y1+U0 */

        More       information       on      YUV      formats      can      be      found      at
       http://www.webartz.com/fourcc/indexyuv.htm            (link             to             URL
       http://www.webartz.com/fourcc/indexyuv.htm) .

SEE ALSO

       SDL_CreateYUVOverlay, SDL_LockYUVOverlay, SDL_UnlockYUVOverlay, SDL_FreeYUVOverlay