private static Bitmap capture(WebBrowser source, IntPtr hwnd)
{
HtmlDocument htmlDocument = source.Document;
HtmlElement htmlElement = htmlDocument.Body;
Rectangle rectangle = new Rectangle(new Point(0, 0), htmlElement.ScrollRectangle.Size);
Bitmap image = new Bitmap(rectangle.Size.Width, rectangle.Size.Height, Graphics.FromHwnd(hwnd));
using (Graphics graphics = Graphics.FromImage(image))
{
IOleObject oleObject = (IOleObject)htmlDocument.DomDocument;
if (oleObject != null)
{
IntPtr imageDC = graphics.GetHdc();
IntPtr pUnk = Marshal.GetIUnknownForObject(source.ActiveXInstance);
try
{
Size currentSize = new Size();
oleObject.GetExtent(DVASPECT.DVASPECT_CONTENT, out currentSize);
Size drawingSize = convertPixelToHIMETRIC(rectangle.Size, imageDC);
oleObject.SetExtent(DVASPECT.DVASPECT_CONTENT, ref drawingSize);
OleDraw(pUnk, DVASPECT.DVASPECT_CONTENT, imageDC, ref rectangle);
oleObject.SetExtent(DVASPECT.DVASPECT_CONTENT, ref currentSize);
}
finally
{
Marshal.Release(pUnk);
graphics.ReleaseHdc(imageDC);
}
}
graphics.Dispose();
}
return(image);
}
/// <summary>
/// コンテンツキャプチャ
/// </summary>
private void GetCaptureImageInternal()
{
if (InvokeRequired)
{
// 別スレッドから呼び出された場合
Invoke(new GetCaptureImageInternalDelegate(GetCaptureImageInternal));
return;
}
Bitmap rt = null;
Size curSize;
try
{
#region コンテンツのボディー部を取得
HtmlDocument htmlDoc = Document;
if (htmlDoc == null)
{
throw new NullReferenceException();
}
HtmlElement element = htmlDoc.Body;
if (element == null)
{
throw new NullReferenceException();
}
IOleObject oleObj = (IOleObject)htmlDoc.DomDocument;
if (oleObj == null)
{
throw new NullReferenceException();
}
#endregion
#region コンテンツの情報を記憶
// スクロール位置を記憶
Point scrOrg = new Point();
scrOrg.X = element.Parent.ScrollLeft;
scrOrg.Y = element.Parent.ScrollTop;
#endregion
#region コンテンツをキャプチャ用に調整
// 一時的に拡大率を変更する
if (zoomNowRate != captureZoomRate)
{
SHDocVw.IWebBrowser2 browser = (SHDocVw.IWebBrowser2)ActiveXInstance;
object izoom = (Int32)captureZoomRate;
object ozoom = (Int32)0;
browser.ExecWB(SHDocVw.OLECMDID.OLECMDID_OPTICAL_ZOOM,
SHDocVw.OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT,
ref izoom, ref ozoom);
}
// コンテンツサイズ計算(スクロールバー分大きくする)
oleObj.GetExtent(DVASPECT.DVASPECT_CONTENT, out curSize);
Rectangle conRect = new Rectangle(0, 0,
(int)(element.ScrollRectangle.Size.Width * captureZoomRate / 100 + 0.5),
(int)(element.ScrollRectangle.Size.Height * captureZoomRate / 100 + 0.5)
);
conRect.Width += SystemInformation.VerticalScrollBarWidth;
conRect.Height += SystemInformation.HorizontalScrollBarHeight;
#endregion
if (captureDrawMode == CaptureDrawModes.OleDraw)
{
rt = new Bitmap(conRect.Width, conRect.Height);
}
else
{
rt = new Bitmap(this.Size.Width, this.Size.Height);
}
Graphics g = Graphics.FromImage(rt);
IntPtr dc = g.GetHdc();
try
{
#region コンテンツ全体をキャプチャ
switch (captureDrawMode)
{
case CaptureDrawModes.OleDraw:
#region OleDrawによるキャプチャ
{
IntPtr pUnk = Marshal.GetIUnknownForObject(ActiveXInstance);
try
{
// コンテンツ描画範囲をコンテンツサイズに設定
Size drawSize = PixelToHIMETRIC(conRect.Size, dc);
oleObj.SetExtent(DVASPECT.DVASPECT_CONTENT, ref drawSize);
// 描画
OleDraw(pUnk, DVASPECT.DVASPECT_CONTENT, dc, ref conRect);
}
catch (Exception es)
{
ThreadExceptionDialog ed = new ThreadExceptionDialog(es);
ed.ShowDialog();
}
finally
{
Marshal.Release(pUnk);
}
}
#endregion
break;
case CaptureDrawModes.PrintWindow:
#region PrintWindowによるキャプチャ
{
// 表示サイズで取得
PrintWindow(Handle, dc, 0);
}
#endregion
break;
}
#endregion
}
catch (Exception es)
{
ThreadExceptionDialog ed = new ThreadExceptionDialog(es);
ed.ShowDialog();
}
finally
{
g.ReleaseHdc(dc);
g.Dispose();
}
#region コンテンツを元に戻す
// 拡大率とコンテンツサイズを戻す
if (zoomNowRate != captureZoomRate)
{
SHDocVw.IWebBrowser2 browser = (SHDocVw.IWebBrowser2)ActiveXInstance;
object izoom = (Int32)zoomNowRate;
object ozoom = (Int32)0;
browser.ExecWB(SHDocVw.OLECMDID.OLECMDID_OPTICAL_ZOOM,
SHDocVw.OLECMDEXECOPT.OLECMDEXECOPT_DODEFAULT,
ref izoom, ref ozoom);
}
oleObj.SetExtent(DVASPECT.DVASPECT_CONTENT, ref curSize);
// スクロール位置を戻す
SetPosition(scrOrg);
#endregion
}
catch (NullReferenceException)
{
if (rt == null)
{
rt = new Bitmap(1, 1);
}
}
catch (Exception es)
{
ThreadExceptionDialog ed = new ThreadExceptionDialog(es);
ed.ShowDialog();
}
imageOrigin = rt;
}