SDL_Overlay.3
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上传日期:2007-02-02
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流媒体/Mpeg4/MP4
开发平台:
Visual C++
- .TH "SDL_Overlay" "3" "Tue 11 Sep 2001, 23:01" "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
- fBformatfR
- Overlay format (see below)
- .TP 20
- fBw, hfR
- Width and height of overlay
- .TP 20
- fBplanesfR
- Number of planes in the overlay&. Usually either 1 or 3
- .TP 20
- fBpitchesfR
- An array of pitches, one for each plane&. Pitch is the length of a row in bytes&.
- .TP 20
- fBpixelsfR
- An array of pointers to teh data of each plane&. The overlay should be locked before these pointers are used&.
- .TP 20
- fBhw_overlayfR
- This will be set to 1 if the overlay is hardware accelerated&.
- .SH "DESCRIPTION"
- .PP
- A fBSDL_OverlayfR is similar to a fIfBSDL_SurfacefRfR except it stores a YUV overlay&. All the fields are read only, except for fBpixelsfR which should be fIlockedfR before use&. The fBformatfR 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
- fIfBSDL_CreateYUVOverlayfPfR, fIfBSDL_LockYUVOverlayfPfR, fIfBSDL_UnlockYUVOverlayfPfR, fIfBSDL_FreeYUVOverlayfPfR
- ..." created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01