internal void OnBrowserRequestsPainting(CefSharp.Structs.Rect dirtyRect, IntPtr buffer, int width, int height)
{
if (_colorBuffer == null || _colorBuffer.Width != width || _colorBuffer.Height != height)
{
_colorBuffer?.Dispose();
_colorBuffer = new DeviceIndependentBitmap(width, height);
}
_colorBuffer.CopyFromBuffer(buffer, (uint)(width * height * 4 /*RGBA*/));
var blend = new NativeMethods.BlendFunction
{
BlendOp = NativeMethods.AC_SRC_OVER,
BlendFlags = 0,
SourceConstantAlpha = 255,
AlphaFormat = NativeMethods.AC_SRC_ALPHA
};
var windowPosition = new NativeMethods.Point
{
X = this.Left,
Y = this.Top
};
var surfaceSize = new NativeMethods.Size
{
Width = _colorBuffer.Width,
Height = _colorBuffer.Height
};
var surfacePosition = new NativeMethods.Point
{
X = 0,
Y = 0
};
try
{
IntPtr handle = this.InvokeSyncOnUI((f) => f.Handle); //IntPtr.Zero;
// this.InvokeSyncOnUIThread(() => handle = this.Handle);
NativeMethods.UpdateLayeredWindow(
handle,
IntPtr.Zero,
ref windowPosition,
ref surfaceSize,
_colorBuffer.DeviceContext,
ref surfacePosition,
0,
ref blend,
NativeMethods.ULW_ALPHA);
}
catch (ObjectDisposedException ex)
{
//can happen, when the form gets killed by the ui thread while we try to render CEF stuff on it
_colorBuffer?.Dispose();
}
}
private void DisposeForm(bool disposing)
{
logger.Debug("Disposing cef overlay");
_formEnsureTopmost?.Dispose();
_formMover?.Dispose();
// Browser?.CloseBrowser(true);
Browser?.Dispose();
Browser = null;
_colorBuffer?.Dispose();
_colorBuffer = null;
}
