/// <summary>
/// Handle a new shared memory format being detected from the compositor.
/// </summary>
/// <param name="data"></param>
/// <param name="sharedMemory"></param>
/// <param name="format"></param>
private void OnSharedMemoryFormat(IntPtr data, IntPtr sharedMemory, SharedMemoryFormat format)
{
List <SharedMemoryFormat> sharedMemoryFormats = new List <SharedMemoryFormat>();
if (SharedMemoryFormats != null)
{
sharedMemoryFormats.AddRange(SharedMemoryFormats);
}
if (!sharedMemoryFormats.Contains(format))
{
sharedMemoryFormats.Add(format);
}
SharedMemoryFormats = sharedMemoryFormats.ToArray();
}
public Buffer CreateBuffer(int width, int height)
{
// Get a handle to our shared memory location
SharedMemoryFormat sharedMemoryFormat = SharedMemoryFormat.ARGB8888;
int stride = width * 4;
int size = height * stride;
int fileDescriptor = SharedMemoryFileDescriptorAllocate(size);
if (fileDescriptor < 0)
{
throw new Exception("Error generating file descriptor for shared memory of size " + size);
}
IntPtr sharedMemoryPointer = SharedMemoryMap(size, fileDescriptor);
if (sharedMemoryPointer == IntPtr.Zero)
{
throw new Exception("Failed to generate shared memory mapping for " + width + " x " + height + " / " + stride + " = " + size);
}
// Now create a pool for this shared memory
SharedMemoryPool pool = new SharedMemoryPool(SharedMemoryPoolCreate(Handle, size, fileDescriptor));
return(pool.CreateBuffer(width, height, stride, sharedMemoryFormat, sharedMemoryPointer));
}
private static extern IntPtr SharedMemoryPoolBufferCreate(IntPtr pool, int width, int height, int stride, SharedMemoryFormat sharedMemoryFormat);
internal Buffer CreateBuffer(int width, int height, int stride, SharedMemoryFormat sharedMemoryFormat, IntPtr sharedMemoryPointer)
{
return(new Buffer(SharedMemoryPoolBufferCreate(Handle, width, height, stride, sharedMemoryFormat), width, height, stride, sharedMemoryPointer));
}
