public ScreenshotData TakeScreenshot()
{
var rWidth = r_Info.Width;
var rHeight = r_Info.Height;
var rResult = new ScreenshotData(rWidth, -rHeight, r_Info.BytesPerPixel * 8);
var rPixels = new byte[rWidth * rHeight * r_Info.BytesPerPixel];
Marshal.Copy(r_Info.BackBufferHandle, rPixels, 0, rPixels.Length);
rResult.BitmapData = rPixels;
return rResult;
}
ScreenshotData TakeScreenshotCore(NativeInterfaces.IViewObject rpViewObject)
{
const int BitCount = 24;
var rEmbedElement = rpViewObject as HTMLEmbed;
var rWidth = rEmbedElement.clientWidth;
var rHeight = rEmbedElement.clientHeight;
var rScreenDC = NativeMethods.User32.GetDC(IntPtr.Zero);
var rHDC = NativeMethods.Gdi32.CreateCompatibleDC(rScreenDC);
var rInfo = new NativeStructs.BITMAPINFO();
rInfo.bmiHeader.biSize = Marshal.SizeOf(typeof(NativeStructs.BITMAPINFOHEADER));
rInfo.bmiHeader.biWidth = rWidth;
rInfo.bmiHeader.biHeight = rHeight;
rInfo.bmiHeader.biBitCount = BitCount;
rInfo.bmiHeader.biPlanes = 1;
IntPtr rBits;
var rHBitmap = NativeMethods.Gdi32.CreateDIBSection(rHDC, ref rInfo, 0, out rBits, IntPtr.Zero, 0);
var rOldObject = NativeMethods.Gdi32.SelectObject(rHDC, rHBitmap);
var rTargetDevice = new NativeStructs.DVTARGETDEVICE() { tdSize = 0 };
var rRect = new NativeStructs.RECT(0, 0, rWidth, rHeight);
var rEmptyRect = default(NativeStructs.RECT);
rpViewObject.Draw(1, 0, IntPtr.Zero, ref rTargetDevice, IntPtr.Zero, rHDC, ref rRect, ref rEmptyRect, IntPtr.Zero, IntPtr.Zero);
var rResult = new ScreenshotData(rWidth, rHeight, BitCount);
var rPixels = new byte[rWidth * rHeight * 3];
Marshal.Copy(rBits, rPixels, 0, rPixels.Length);
rResult.BitmapData = rPixels;
NativeMethods.Gdi32.SelectObject(rHDC, rOldObject);
NativeMethods.Gdi32.DeleteObject(rHBitmap);
NativeMethods.Gdi32.DeleteDC(rHDC);
NativeMethods.User32.ReleaseDC(IntPtr.Zero, rScreenDC);
return rResult;
}
