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The DDGPESurfobject has overridden several of the GPESurfobject's constructors in order to add functionality.
When your driver creates a surface, it should never create a DDGPESurfobject directly. Instead, you should define your own surface object that derives from DDGPESurf. To add hardware- or driver-specific functionality, you can new constructors and possibly override one or more of the existing constructors.
If your surface object calls one of the DDGPESurfconstructors without supplying a pointer to memory that has been allocated for the surface's graphic information, DDGPESurfwill automatically allocate system memory for you. The DDGPESurfdestructor will free any memory allocated by the DDGPESurfconstructors.
DDGPESurf ( int width , int height , void * pBits , int stride , EGPEFormat format ); DDGPESurf ( int width , int height , void * pBits , int stride , EGPEFormat format , EDDGPEPixelFormat pixelFormat ); DDGPESurf ( int width , int height , int stride , EGPEFormat format , EDDGPEPixelFormat pixelFormat ); DDGPESurf ( int width , int height , EGPEFormat format );
Parameters
- width
- The requested width for the surface, in pixels.
- height
- The requested height for the surface, in pixels.
- pBits
- A pointer that has been allocated for the surface's graphic data. If the pBits parameter is not passed into the constructor, the DDGPESurfobject allocates system memory for that surface's data.
- stride
- The requested stride for the surface.
- format
- The requested format for the surface.
- pixelFormat
- The requested pixel format for the surface.
Last updated on Tuesday, July 13, 2004