public WriteableBitmap(IntPtr intPtr, int width, int height, PixelFormat pixelFormat)
{
Width = width;
Height = height;
PixelFormat = pixelFormat;
Stride = CalculateStride(pixelFormat, width);
Offset = 0;
BytesPerPixel = ((pixelFormat.BitsPerPixel + 7) / 8);
Length = width * height * BytesPerPixel;
_memoryMapSection = intPtr;
_mapView = Win32Interop.MapViewOfFile(_memoryMapSection, 0xF001F, 0, 0, (UInt32)Length);
_mustDisposeMapView = true;
BitmapSource = (InteropBitmap)Imaging.CreateBitmapSourceFromMemorySection(_mapView, width, height, pixelFormat, Stride, Offset);
}
public WriteableBitmap(int width, int height, PixelFormat pixelFormat)
{
Width = width;
Height = height;
PixelFormat = pixelFormat;
Stride = CalculateStride(pixelFormat, width);
Offset = 0;
BytesPerPixel = ((pixelFormat.BitsPerPixel + 7) / 8);
Length = width * height * BytesPerPixel;
//IntPtr = Marshal.AllocHGlobal(Length);
//this.MemoryMappedFile = MemoryMappedFile.CreateNew(null, Length, MemoryMappedFileAccess.ReadWrite);
//IntPtr = this.MemoryMappedFile.CreateViewAccessor().SafeMemoryMappedViewHandle.DangerousGetHandle();
_memoryMapSection = Win32Interop.CreateFileMapping(new IntPtr(-1), IntPtr.Zero, 0x04, 0, (UInt32)Length, null);
_mustDisposeMemoryMapSection = true;
_mapView = Win32Interop.MapViewOfFile(_memoryMapSection, 0xF001F, 0, 0, (UInt32)Length);
_mustDisposeMapView = true;
BitmapSource = (InteropBitmap)Imaging.CreateBitmapSourceFromMemorySection(_memoryMapSection, width, height, pixelFormat, Stride, Offset);
}