mirror of
https://github.com/joel16/SDL2.git
synced 2024-12-14 14:59:43 +00:00
2f110628a7
--HG-- extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%401
53 lines
1.8 KiB
Groff
53 lines
1.8 KiB
Groff
.TH "SDL_Overlay" "3" "Mon 12 Mar 2001, 01:04" "SDL" "SDL API Reference"
|
|
.SH "NAME"
|
|
SDL_Overlay\- YUV video overlay
|
|
.SH "STRUCTURE DEFINITION"
|
|
.PP
|
|
.nf
|
|
\f(CWtypedef struct{
|
|
Uint32 format;
|
|
int w, h;
|
|
int planes;
|
|
Uint16 *pitches;
|
|
Uint8 **pixels;
|
|
Uint32 hw_overlay:1;
|
|
} SDL_Overlay;\fR
|
|
.fi
|
|
.PP
|
|
.SH "STRUCTURE DATA"
|
|
.TP 20
|
|
\fBformat\fR
|
|
Overlay format (see below)
|
|
.TP 20
|
|
\fBw, h\fR
|
|
Width and height of overlay
|
|
.TP 20
|
|
\fBplanes\fR
|
|
Number of planes in the overlay\&. Usually either 1 or 3
|
|
.TP 20
|
|
\fBpitches\fR
|
|
An array of pitches, one for each plane\&. Pitch is the length of a row in bytes\&.
|
|
.TP 20
|
|
\fBpixels\fR
|
|
An array of pointers to teh data of each plane\&. The overlay should be locked before these pointers are used\&.
|
|
.TP 20
|
|
\fBhw_overlay\fR
|
|
This will be set to 1 if the overlay is hardware accelerated\&.
|
|
.SH "DESCRIPTION"
|
|
.PP
|
|
A \fBSDL_Overlay\fR is similar to a \fI\fBSDL_Surface\fR\fR except it stores a YUV overlay\&. All the fields are read only, except for \fBpixels\fR which should be \fIlocked\fR before use\&. The \fBformat\fR field stores the format of the overlay which is one of the following:
|
|
.PP
|
|
.nf
|
|
\f(CW#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 */\fR
|
|
.fi
|
|
.PP
|
|
More information on YUV formats can be found at \fIhttp://www\&.webartz\&.com/fourcc/indexyuv\&.htm (link to URL http://www.webartz.com/fourcc/indexyuv.htm) \fR\&.
|
|
.SH "SEE ALSO"
|
|
.PP
|
|
\fI\fBSDL_CreateYUVOverlay\fP\fR, \fI\fBSDL_LockYUVOverlay\fP\fR, \fI\fBSDL_UnlockYUVOverlay\fP\fR, \fI\fBSDL_FreeYUVOverlay\fP\fR
|
|
...\" created by instant / docbook-to-man, Mon 12 Mar 2001, 01:04
|