把网页抓图保存成JPG文件(针对单框架网页)。
procedure TForm1.Button1Click(Sender: TObject);
var
Doc: IHTMLDocument2;
ViewObject: IViewObject;
sourceDrawRect: TRect;
a, getjpg: TBitMap;
i, m: integer;
pdest, psour: hbitmap;
jpg: tjpegimage;
begin
Doc := WebBrowser.Document as IHTMLDocument2;
if Webbrowser.Document <> nil then
try
webbrowser.Document.QueryInterface(IViewObject, ViewObject);
if ViewObject <> nil then
try
Doc.Get_ParentWindow.Scroll(0, 0); //跳到网页头
getjpg := TBitMap.Create();
getjpg.PixelFormat := pf24bit;
getjpg.Height := doc.Body.getAttribute('scrollHeight', 0);
getjpg.Width := doc.Body.getAttribute('scrollwidth', 0);
pdest := getjpg.Canvas.Handle;
m := Trunc(doc.Body.getAttribute('ScrollHeight', 0) / (doc.Body.getAttribute('offsetHeight', 0) - 20));
i := Trunc(doc.Body.getAttribute('Scrollwidth', 0) / (doc.Body.getAttribute('offsetwidth', 0) - 20));
for i := 0 to i do
begin
for m := 0 to m + 1 do
begin
a := TBitMap.Create();
a.Height := doc.Body.getAttribute('offsetHeight', 0);
a.Width := doc.Body.getAttribute('offsetwidth', 0);
psour := a.Canvas.handle;
sourceDrawRect := Rect(0, 0, a.Width, a.Height);
ViewObject.Draw(DVASPECT_CONTENT, 1, nil, nil, Self.Handle, a.Canvas.Handle, @sourceDrawRect, nil, nil, 0);
bitblt(pdest, doc.Body.getAttribute('scrollLeft', 0), doc.Body.getAttribute('Scrolltop', 0), a.Width, a.Height, psour, 2, 2, srccopy);
Doc.Get_ParentWindow.Scroll(doc.Body.getAttribute('scrollLeft', 0), doc.Body.getAttribute('offsetHeight', 0) + doc.Body.getAttribute('Scrolltop', 0) - GetSystemMetrics(SM_CXVSCROLL) - 24);
a.Free;
end;
Doc.Get_ParentWindow.Scroll(doc.Body.getAttribute('offsetwidth', 0) + doc.Body.getAttribute('scrollLeft', 0) - GetSystemMetrics(SM_CXVSCROLL) - 24, 0);
end;
jpg := tjpegimage.Create;
jpg.Assign(getjpg);
getjpg.Free;
jpg.SaveToFile('c:\test.jpg');
jpg.Free;
finally
ViewObject._Release;
end;
except
end;
end; |
