/// <summary>
/// Called when an element should be painted. (Invoked from CefRenderHandler.OnPaint)
/// </summary>
/// <param name="type">indicates whether the element is the view or the popup widget.</param>
/// <param name="dirtyRect">contains the set of rectangles in pixel coordinates that need to be repainted</param>
/// <param name="buffer">The bitmap will be will be width * height *4 bytes in size and represents a BGRA image with an upper-left origin</param>
/// <param name="width">width</param>
/// <param name="height">height</param>
void IRenderWebBrowser.OnPaint(PaintElementType type, Rect dirtyRect, IntPtr buffer, int width, int height)
{
var handled = false;
var args = new OnPaintEventArgs(type == PaintElementType.Popup, dirtyRect, buffer, width, height);
var handler = Paint;
if (handler != null)
{
handler(this, args);
handled = args.Handled;
}
if (!handled)
{
RenderHandler?.OnPaint(type, dirtyRect, buffer, width, height);
}
var afterHandler = AfterPaint;
if (afterHandler != null)
{
afterHandler(this, args);
}
}
/// <summary>
/// Invoked from CefRenderHandler.OnPaint
/// A new <see cref="Bitmap" /> is only created when <see cref="BitmapInfo.CreateNewBitmap" />
/// is true, otherwise the new buffer is simply copied into the backBuffer of the existing
/// <see cref="Bitmap" /> for efficiency. Locking provided by OnPaint as this method is called
/// in it's lock scope.
/// </summary>
/// <param name="bitmapInfo">information about the bitmap to be rendered</param>
void IRenderWebBrowser.OnPaint(BitmapInfo bitmapInfo)
{
var handled = false;
var handler = OnPaint;
if (handler != null)
{
var args = new OnPaintEventArgs(bitmapInfo.IsPopup, bitmapInfo.DirtyRect, bitmapInfo.BackBufferHandle,
bitmapInfo.Width, bitmapInfo.Height, bitmapInfo.BytesPerPixel, bitmapInfo.NumberOfBytes);
handler(this, args);
handled = args.Handled;
}
if (!handled)
{
var newScreenshotHandler = NewScreenshot;
if (newScreenshotHandler != null)
{
newScreenshotHandler(this, EventArgs.Empty);
}
InvokeRenderAsync(bitmapInfo);
}
}
