Annotated edit history of
SDL_Overlay(3) version 1, including all changes.
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SDL_Overlay |
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!!!SDL_Overlay |
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NAME |
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STRUCTURE DEFINITION |
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STRUCTURE DATA |
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DESCRIPTION |
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SEE ALSO |
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---- |
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!!NAME |
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SDL_Overlay- YUV video overlay |
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!!STRUCTURE DEFINITION |
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typedef struct{ |
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Uint32 format; |
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int w, 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; |
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!!STRUCTURE DATA |
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__format__ Overlay format (see below) |
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__w, h__ Width and height of overlay |
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__planes__ Number of planes in the overlay. Usually |
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either 1 or 3 |
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__pitches__ An array of pitches, one for each plane. |
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Pitch is the length of a row in bytes. |
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__pixels__ An array of pointers to teh data of each |
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plane. The overlay should be locked before these pointers |
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are used. |
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__hw_overlay__ This will be set to 1 if the overlay is |
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hardware accelerated. |
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!!DESCRIPTION |
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A __SDL_Overlay__ is similar to a __SDL_Surface__ |
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except it stores a YUV overlay. All the fields are read |
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only, except for __pixels__ which should be ''locked'' |
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before use. The __format__ field stores the format of the |
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overlay which is one of the following: |
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#define SDL_YV12_OVERLAY 0x32315659 /* Planar mode: Y + V + U */ |
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#define SDL_IYUV_OVERLAY 0x56555949 /* Planar mode: Y + U + V */ |
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#define SDL_YUY2_OVERLAY 0x32595559 /* Packed mode: Y0+U0+Y1+V0 */ |
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#define SDL_UYVY_OVERLAY 0x59565955 /* Packed mode: U0+Y0+V0+Y1 */ |
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#define SDL_YVYU_OVERLAY 0x55595659 /* Packed mode: Y0+V0+Y1+U0 */ |
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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)'' . |
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!!SEE ALSO |
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__SDL_CreateYUVOverlay__, __SDL_LockYUVOverlay__, |
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__SDL_UnlockYUVOverlay__, |
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__SDL_FreeYUVOverlay__ |
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---- |
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