GPESurf (Windows Embedded CE 6.0)
1/6/2010
The GPESurf class represents a surface allocated, by the driver or by the Graphics Device Interface (GDI). The surface retains pixels in system memory or, if available on the Windows Embedded CE–based platform, in video memory.
Generally, this class is created for all surfaces when the driver allocates memory; for example, in response to the DrvCreateDeviceBitmap function.
If the GDI allocates the surface, the driver creates a temporary surface of the TmpGPESurf class, which is derived from this class. This class is a wrapper around the SURFOBJ type created by the GPE.
TmpGPESurf objects persist only for the duration of the call to the display driver.
This class provides a number of methods for a driver to retrieve pointers to pixel data, pixel format, stride, height, and width.
In addition, GPESurf retains a flag to indicate whether the data is stored in video memory, which is verified by a call to the GPESurf::InVideoMemory method. The class also retains a flag that determines whether memory should be deallocated when the GPESurf object is deleted.
Typically, you derive a new surface class based on the GPESurf class for video memory allocations.
See Also
Concepts
GPE Base Classes
GPE
Node2D
ColorConverter
GPEVGA
Display Driver Extensions
Display Driver Samples