public void WritableBitmapShouldBeUsable(PixelFormat fmt)
{
var writableBitmap = new WritableBitmap(256, 256, fmt);
var data = new int[256 * 256];
for (int y = 0; y < 256; y++)
{
for (int x = 0; x < 256; x++)
{
data[y * 256 + x] = (int)((uint)(x + (y << 8)) | 0xFF000000u);
}
}
using (var l = writableBitmap.Lock())
{
for (var r = 0; r < 256; r++)
{
Marshal.Copy(data, r * 256, new IntPtr(l.Address.ToInt64() + r * l.RowBytes), 256);
}
}
var name = nameof(WritableBitmapShouldBeUsable) + "_" + fmt;
writableBitmap.Save(System.IO.Path.Combine(OutputPath, name + ".out.png"));
CompareImages(name);
}
public override void Render(DrawingContext context)
{
if (_lastFrame != null)
{
var fmt = (PixelFormat)_lastFrame.Format;
if (_bitmap == null || _bitmap.PixelWidth != _lastFrame.Width ||
_bitmap.PixelHeight != _lastFrame.Height)
{
_bitmap = new WritableBitmap(_lastFrame.Width, _lastFrame.Height, fmt);
}
using (var l = _bitmap.Lock())
{
var lineLen = (fmt == PixelFormat.Rgb565 ? 2 : 4) * _lastFrame.Width;
for (var y = 0; y < _lastFrame.Height; y++)
{
Marshal.Copy(_lastFrame.Data, y * _lastFrame.Stride,
new IntPtr(l.Address.ToInt64() + l.RowBytes * y), lineLen);
}
}
context.DrawImage(_bitmap, 1, new Rect(0, 0, _bitmap.PixelWidth, _bitmap.PixelHeight),
new Rect(Bounds.Size));
}
base.Render(context);
}