SDL_Overlay — YUV video overlay
| typedef | struct { | |||
| Uint32 |
format; |
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| int |
w, |
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h; |
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| int |
planes; |
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| Uint16 | * |
pitches; |
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| Uint8 | ** |
pixels; |
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| Uint32 |
hw_overlay:1; |
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| } SDL_Overlay; | ||||
formatOverlay format (see below)
Width and height of overlay
planesNumber of planes in the overlay. Usually either 1 or 3
pitchesAn array of pitches, one for each plane. Pitch is the length of a row in bytes.
pixelsAn array of pointers to teh data of each plane. The overlay should be locked before these pointers are used.
hw_overlayThis will be set to 1 if the overlay is hardware accelerated.
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) .
SDL_CreateYUVOverlay(3), SDL_LockYUVOverlay(3), SDL_UnlockYUVOverlay(3), SDL_FreeYUVOverlay(3)
| COPYRIGHT |
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This manual page is taken from the SDL library, licensed under GNU LGPL. |