public bool Draw(WallpaperRenderer renderer, IntPtr hdc, IntPtr memDc)
{
if (!BrowserManager.Browser.ShouldDraw)
{
return(false);
}
BrowserManager.Browser.ShouldDraw = false;
Size wallpaperSize = renderer.ScreenManager.WallpaperSize;
if (!BrowserManager.Browser.Size.Equals(wallpaperSize))
{
BrowserManager.Browser.Size = wallpaperSize;
}
Bitmap bitmap = BrowserManager.Browser.GetRenderData();
if (bitmap == null)
{
if (lastRenderData != null)
{
bitmap = lastRenderData;
}
else
{
return(false);
}
}
else
{
lastRenderData?.Dispose();
}
IntPtr hBitmap = bitmap.GetHbitmap();
NativeWin32.SelectObject(memDc, hBitmap);
Point offset = renderer.ScreenManager.WallpaperOffset;
bool flag = NativeWin32.BitBlt(hdc,
offset.X, offset.Y,
wallpaperSize.Width, wallpaperSize.Height,
memDc,
0, 0,
NativeWin32.TernaryRasterOperations.SRCCOPY);
NativeWin32.DeleteObject(hBitmap);
lastRenderData = bitmap;
return(flag);
}