[Gepbl4]

Добрый день. Имеется модуль для импорта изображений в RichEdit:

Код:

unit LoadImage;
 
interface
 
uses Windows;
 
procedure InsertBitmapToRE(Wnd:HWND; Bmp:HBITMAP);

implementation
 
uses Activex, RichEdit;
 
const
  IID_IDataObject: TGUID = (
   D1:$0000010E;D2:$0000;D3:$0000;D4:($C0,$00,$00,$00,$00,$00,$00,$46));
  IID_IOleObject: TGUID = (
    D1:$00000112;D2:$0000;D3:$0000;D4:($C0,$00,$00,$00,$00,$00,$00,$46));
 
  REO_CP_SELECTION    = ULONG(-1);
  REO_IOB_SELECTION   = ULONG(-1);
  REO_GETOBJ_POLEOBJ  =  $00000001;
 
type
  TReobject = record
    cbStruct: DWORD;
    cp: ULONG;
    clsid: TCLSID;
    poleobj: IOleObject;
    pstg: IStorage;
    polesite: IOleClientSite;
    sizel: TSize;
    dvAspect: Longint;
    dwFlags: DWORD;
    dwUser: DWORD;
  end;
 
type
  IRichEditOle = interface(IUnknown)
    ['{00020d00-0000-0000-c000-000000000046}']
    function GetClientSite(out clientSite: IOleClientSite): HResult; stdcall;
    function GetObjectCount: HResult; stdcall;
    function GetLinkCount: HResult; stdcall;
    function GetObject(iob: Longint; out reobject: TReObject;
      dwFlags: DWORD): HResult; stdcall;
    function InsertObject(var reobject: TReObject): HResult; stdcall;
    function ConvertObject(iob: Longint; rclsidNew: TIID;
      lpstrUserTypeNew: LPCSTR): HResult; stdcall;
    function ActivateAs(rclsid: TIID; rclsidAs: TIID): HResult; stdcall;
    function SetHostNames(lpstrContainerApp: LPCSTR;
      lpstrContainerObj: LPCSTR): HResult; stdcall;
    function SetLinkAvailable(iob: Longint; fAvailable: BOOL): HResult; stdcall;
    function SetDvaspect(iob: Longint; dvaspect: DWORD): HResult; stdcall;
    function HandsOffStorage(iob: Longint): HResult; stdcall;
    function SaveCompleted(iob: Longint; const stg: IStorage): HResult; stdcall;
    function InPlaceDeactivate: HResult; stdcall;
    function ContextSensitiveHelp(fEnterMode: BOOL): HResult; stdcall;
    function GetClipboardData(var chrg: TCharRange; reco: DWORD;
      out dataobj: IDataObject): HResult; stdcall;
    function ImportDataObject(dataobj: IDataObject; cf: TClipFormat;
      hMetaPict: HGLOBAL): HResult; stdcall;
  end;
 
  TImageDataObject=class(TInterfacedObject,IDataObject)
  private
   FBmp:HBITMAP;
   FMedium:TStgMedium;
   FFormatEtc: TFormatEtc;
   procedure SetBitmap(bmp:HBITMAP);
   function GetOleObject(OleClientSite:IOleClientSite; Storage:IStorage):IOleObject;
   destructor Destroy;override;
 
   // IDataObject
   function GetData(const formatetcIn: TFormatEtc; out medium: TStgMedium): HResult; stdcall;
    function GetDataHere(const formatetc: TFormatEtc; out medium: TStgMedium): HResult; stdcall;
    function QueryGetData(const formatetc: TFormatEtc): HResult; stdcall;
    function GetCanonicalFormatEtc(const formatetc: TFormatEtc; out formatetcOut: TFormatEtc): HResult; stdcall;
    function SetData(const formatetc: TFormatEtc; var medium: TStgMedium; fRelease: BOOL): HResult; stdcall;
    function EnumFormatEtc(dwDirection: Longint; out enumFormatEtc: IEnumFormatEtc): HResult; stdcall;
    function DAdvise(const formatetc: TFormatEtc; advf: Longint; 
                     const advSink: IAdviseSink; out dwConnection: Longint): HResult; stdcall;
    function DUnadvise(dwConnection: Longint): HResult; stdcall;
    function EnumDAdvise(out enumAdvise: IEnumStatData): HResult; stdcall;
  public
   procedure InsertBitmap(wnd:HWND; Bitmap:HBITMAP);
  end;
 
 
{ TImageDataObject }
 
function TImageDataObject.DAdvise(const formatetc: TFormatEtc; advf: Integer;
  const advSink: IAdviseSink; out dwConnection: Integer): HResult;
begin
 Result:=E_NOTIMPL;
end;
 
function TImageDataObject.DUnadvise(dwConnection: Integer): HResult;
begin
 Result:=E_NOTIMPL;
end;
 
function TImageDataObject.EnumDAdvise(out enumAdvise: IEnumStatData): HResult;
begin
 Result:=E_NOTIMPL;
end;
 
function TImageDataObject.EnumFormatEtc(dwDirection: Integer; out enumFormatEtc: IEnumFormatEtc): HResult;
begin
 Result:=E_NOTIMPL;
end;
 
function TImageDataObject.GetCanonicalFormatEtc(const formatetc: TFormatEtc; out formatetcOut: TFormatEtc): HResult;
begin
 Result:=E_NOTIMPL;
end;
 
function TImageDataObject.GetDataHere(const formatetc: TFormatEtc; out medium: TStgMedium): HResult;
begin
 Result:=E_NOTIMPL;
end;
 
function TImageDataObject.QueryGetData(const formatetc: TFormatEtc): HResult;
begin
 Result:=E_NOTIMPL;
end;
 
destructor TImageDataObject.Destroy;
begin
 ReleaseStgMedium(FMedium);
end;
 
function TImageDataObject.GetData(const formatetcIn: TFormatEtc; out medium: TStgMedium): HResult;
begin
 medium.tymed := TYMED_GDI;
 medium.hBitmap :=  FMedium.hBitmap;
 medium.unkForRelease := nil;
 Result:=S_OK;
end;
 
function TImageDataObject.SetData(const formatetc: TFormatEtc; var medium: TStgMedium; fRelease: BOOL): HResult;
begin
 FFormatEtc := formatetc;
 FMedium := medium;
 Result:= S_OK;
end;
 
procedure TImageDataObject.SetBitmap(bmp: HBITMAP);
var
 stgm: TStgMedium;
 fm:TFormatEtc;
begin
 stgm.tymed := TYMED_GDI;
 stgm.hBitmap := bmp;
 stgm.UnkForRelease := nil;
 
 fm.cfFormat := CF_BITMAP;
 fm.ptd := nil;
 fm.dwAspect := DVASPECT_CONTENT;
 fm.lindex := -1;
 fm.tymed := TYMED_GDI;
 SetData(fm, stgm, FALSE);
end;
 
function TImageDataObject.GetOleObject(OleClientSite: IOleClientSite; Storage: IStorage):IOleObject;
begin
 if (Fmedium.hBitmap=0) then Result:=nil else
  OleCreateStaticFromData(self, IID_IOleObject, OLERENDER_FORMAT, @FFormatEtc, OleClientSite, Storage, Result);
end;
 
procedure TImageDataObject.InsertBitmap(wnd:HWND; Bitmap: HBITMAP);
var
 OleClientSite:IOleClientSite;
 RichEditOLE:IRichEditOLE;
 Storage:IStorage;
 LockBytes:ILockBytes;
 OleObject:IOleObject;
 reobject:TReobject;
 clsid:TGUID;
begin
 if (SendMessage(wnd, EM_GETOLEINTERFACE, 0, cardinal(@RichEditOle))=0) then exit;
 
 FBmp:=CopyImage(Bitmap,IMAGE_BITMAP,0,0,0);
 if  FBmp=0 then exit;
 try
   SetBitmap(Fbmp);
   RichEditOle.GetClientSite(OleClientSite);
   if (OleClientSite=nil) then exit;
   CreateILockBytesOnHGlobal(0, TRUE,LockBytes);
   if (LockBytes = nil) then exit;
   if (StgCreateDocfileOnILockBytes(LockBytes, STGM_SHARE_EXCLUSIVE or STGM_CREATE or STGM_READWRITE, 0,Storage)<> S_OK) then
   begin
      LockBytes._Release;
      exit
    end;
 
   if (Storage = nil) then exit;
   OleObject:=GetOleObject(OleClientSite, Storage);
   if (OleObject = nil) then exit;
   OleSetContainedObject(OleObject, TRUE);
 
   ZeroMemory(@reobject, sizeof(TReobject));
   reobject.cbStruct := sizeof(TReobject);
   OleObject.GetUserClassID(clsid);
   reobject.clsid := clsid;
   reobject.cp := REO_CP_SELECTION;
   reobject.dvaspect := DVASPECT_CONTENT;
   reobject.poleobj := OleObject;
   reobject.polesite := OleClientSite;
   reobject.pstg := Storage;
 
   RichEditOle.InsertObject(reobject);
 finally
   DeleteObject(FBmp)
 end
end;
 
 
procedure InsertBitmapToRE(Wnd:HWND; bmp:HBITMAP);
begin
 with TImageDataObject.Create do
 try
  InsertBitmap(Wnd,Bmp);
 finally
  Free
 end
end;
 
 
end.

Картинка успешно помещается в RichEdit и сохраняется. Прошу вашего совета: как сохраненную картинку прочитать и загрузить обратно в RichEdit? Удивило практически полное отсутствие информации по данному вопросу.

P.S.: Не нужно предлагать использовать сторонние компоненты подобные RxLib и иже с ними. С их использованием проблем нет - мне нужен именно стандартный RichEdit