SDL_Overlay man page on JazzOS

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SDL_Overlay(3)		       SDL API Reference		SDL_Overlay(3)

       SDL_Overlay - YUV video overlay

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

       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

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

       A SDL_Overlay is similar to a SDL_Surface except it stores a YUV	 over‐
       lay.  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      (link	  to	   URL .

       SDL_CreateYUVOverlay,	 SDL_LockYUVOverlay,	 SDL_UnlockYUVOverlay,

SDL			    Tue 11 Sep 2001, 23:01		SDL_Overlay(3)

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