public void GLUnmapBufferObject(UInt32 bufferId)
{
CudaUtil.Call(CudaMem.cuGLUnmapBufferObject(bufferId));
ptr = DevicePtr2D.Zero;
widthInBytes = 0;
height = 0;
}
/// <summary>
/// Allocates a 2D block of memory, and returns a pointer pointing to it. Rows are NOT padded,
/// and may not meet the hardware's alignment requirements.
/// </summary>
/// <param name="widthInBytes">The number of bytes to allocate for each row.</param>
/// <param name="height">The number of rows to allocate</param>
/// <returns>A pointer to the new block</returns>
public static DevicePtr2D AllocRaw(uint widthInBytes, uint height)
{
DevicePtr2D result = new DevicePtr2D();
result.pitch = widthInBytes;
CudaUtil.Call(CudaMem.cuMemAlloc(out result.ptr, widthInBytes * height));
return(result);
}
/// <summary>
/// Copies data from host memory to device memory. No size checks are performed, it is
/// up to the programmer to ensure the destination is large enough to hold the data.
/// </summary>
/// <param name="src">The source buffer</param>
/// <param name="dest">The destination pointer</param>
/// <param name="widthInBytes">The size of each row in bytes</param>
/// <param name="height">The number of rows</param>
public static void CopyRaw2D(IntPtr srcPtr, DevicePtr2D dest, IntPtr widthInBytes, IntPtr height)
{
if (srcPtr == IntPtr.Zero || dest == DevicePtr2D.Zero)
{
throw new NullPointerException();
}
CudaUtil.Call(CudaMem.memcpy2DHelper(
MemoryType.Host, 0, 0, srcPtr, (uint)widthInBytes,
MemoryType.Device, 0, 0, (IntPtr)dest.ptr, (uint)dest.Pitch,
(uint)widthInBytes, (uint)height)
);
}
internal DeviceBuffer2D(DevicePtr2D ptr, uint widthInBytes, uint height)
{
this.ptr = ptr;
this.widthInBytes = widthInBytes;
this.height = height;
}