LDialogWeb::DoModalGIFWebTuner

#include "ltwrappr.h"

virtual L_INT LDialogWeb::DoModalGIFWebTuner (hWndOwner)

HWND hWndOwner;

/* handle of the window which owns the dialog*/

Displays the GIF Web tuner dialog box, and gets tuning options used by LBitmapBase::ColorRes, LBitmapBase::Fill, LBitmapBase::Save, LBitmapRgn::SetRgnColorRGBRange.

Parameter	Description
hWndOwner	Handle of the window which owns the dialog.

Returns

SUCCESS_DLG_OK	The "OK" button was pressed, and the dialog exited successfully.
SUCCESS_DLG_CLOSE	The "Close" button was pressed, and the dialog exited successfully.
SUCCESS_DLG_CANCEL	The "Cancel" button was pressed, and the dialog exited successfully.
< 1	An error occurred. Refer to Return Codes.

Comments

LDialogWeb::SetGIFWebTunerParams must be called before using this function to sets the initial values for the dialog. You can get the updated GIFWEBTUNERDLGPARAMS with the values entered by the user through the dialog by using LDialogWeb::GetGIFWebTunerParams.

The GIF Web Tuner dialog is shown in the following figure:

$image\GIFWebTuner.gif$

Required DLLs and Libraries

LTDLGWEB
LTDLGKRN
LTDLGUTL
LTDLGCTRL
LTDLGCOM
LTFIL
LTDIS
LTIMG

For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application

See Also

Functions:	LDialogBase::Initialize, LDialogFile::DoModalSave, LDialogWeb::DoModalGIFWebTuner, LDialogWeb::DoModalJPEGWebTuner, LBase::EnableCallBack, LDialogBase::EnablePreview, LDialogBase::EnableAutoProcess, LDialogBase::EnableToolbar, LDialogBase::Free, LDialogWeb::GetGIFWebTunerParams, LDialogWeb::SetGIFWebTunerParams, Class Members
Topics:	Using Imaging Common Dialog

Example 1:

Example 2:

void TestFunction(LBitmap * pBitmap, HWND hWnd)
{
   L_INT nRet = 0;
   LDialogWeb DlgWeb;

   GIFWEBTUNERDLGPARAMS DlgParams;
   DlgWeb.SetBitmap (pBitmap);
   memset ( &DlgParams, 0, sizeof (GIFWEBTUNERDLGPARAMS) ) ;
   LDialogWeb::Initialize (0);
   DlgParams.uStructSize      = sizeof (GIFWEBTUNERDLGPARAMS) ;
   DlgParams.uDlgFlags = DLG_GIFWEBTUNER_SHOW_INFORMATION |
                         DLG_GIFWEBTUNER_SHOW_TOOL_COLORPICKER |
                         DLG_GIFWEBTUNER_SHOW_TRANSPARENCY |
                         DLG_GIFWEBTUNER_SHOW_OPTIONS |
                         DLG_GIFWEBTUNER_SHOW_ADDWINDOWCOLOR ;

   DlgWeb.EnablePreview(TRUE);
   DlgWeb.EnableToolbar(TRUE);
   DlgWeb.EnableCallBack(FALSE);
   DlgWeb.SetGIFWebTunerParams (&DlgParams) ;
   nRet = DlgWeb.DoModalGIFWebTuner(hWnd);
   // Gets the updated values for the structure
   DlgWeb.GetGIFWebTunerParams(&DlgParams, sizeof(DlgParams)) ;

   LDialogWeb::Free ();

   if ( SUCCESS_DLG_OK == nRet )
   {
      ExportBitmap ( TEXT("tuned.gif"), pBitmap, &DlgParams ) ;
   }

}

COLORREF AddTolerance ( COLORREF crColor, L_INT nTolerance )
{
   L_INT nRed ;
   L_INT nGreen ;
   L_INT nBlue ;

   nRed   = max ( min ( ( L_INT ) GetRValue ( crColor ) + nTolerance, 255 ), 0 ) ;
   nGreen = max ( min ( ( L_INT ) GetGValue ( crColor ) + nTolerance, 255 ), 0 ) ;
   nBlue  = max ( min ( ( L_INT ) GetBValue ( crColor ) + nTolerance, 255 ), 0 ) ;

   return RGB ( nRed, nGreen, nBlue ) ;
}

L_VOID ExportBitmap
(
   L_TCHAR L_FAR* szFileName,
   LBitmapBase *pLBitmap,
   LPGIFWEBTUNERDLGPARAMS pParam
)
{
   {// TRANSPERANCY

      if ( pParam->bTransparent )
      {
         COLORREF crTransparentStart ;
         COLORREF crTransparentEnd ;

         crTransparentStart = AddTolerance ( pParam->crTransparent,
                                             - pParam->nTransparencyTolerance ) ;

         crTransparentEnd   = AddTolerance ( pParam->crTransparent,
                                             pParam->nTransparencyTolerance ) ;
         // reset
         pLBitmap->Region()-> Free();

         // set attributes
         pLBitmap-> EnablePlayBackTransparency(TRUE);
         pLBitmap-> SetPlayBackTransparentColor(pParam->crTransparent);

         // replace colors
         if ( pParam->nTransparencyTolerance >= 0 )
         {
            pLBitmap->Region()->SetRgnCombineMode(L_RGN_SET);
            pLBitmap->Region()->SetRgnColorRGBRange(crTransparentStart,
                                          crTransparentEnd) ;

            if ( pLBitmap-> HasRgn() )
            {
               pLBitmap->Fill(pParam->crTransparent);
            }

            pLBitmap->Region()-> Free();
         }
      }

   }// TRANSPERANCY

   {// COLOR RESOLUTION

      L_UINT32 uFlags ;

      if ( ( 24 != pParam->nBitsPerPixel ) || ( 0 != pParam->nPalType ) )
      {
         uFlags  = ( ( pParam->bAddWindowsColors ) && ( CRF_OPTIMIZEDPALETTE == pParam->nPalType ) ) ? CRF_IDENTITYPALETTE : 0 ;
         uFlags |= pParam->nDitherType ;
         uFlags |= pParam->nPalType ;

         pLBitmap->ColorRes(pParam->nBitsPerPixel,
                            uFlags,
                            NULL,
                            NULL,
                            pParam->nNumOfColors) ;
      }

   }// COLOR RESOLUTION

   {// SAVE TO DISK

      SAVEFILEOPTION SaveOptions ;

      memset ( &SaveOptions, 0, sizeof ( SAVEFILEOPTION ) ) ;

      if ( pParam->bInterlaced )
      {
         SaveOptions.Flags = ESO_INTERLACED ;
      }

      pLBitmap->Save(szFileName,
                     FILE_GIF,
                     pParam->nBitsPerPixel,
                     0, 0,
                     &SaveOptions ) ;

   }// SAVE TO DISK
}