L_DlgPNGWebTuner

#include "l_bitmap.h"

L_INT EXT_FUNCTION L_DlgPNGWebTuner(hWndOwner, pDlgParams)

HWND hWndOwner;	/* owner of dialog */
LPPNGWEBTUNERDLGPARAMS pDlgParams;	/* pointer to a structure */

Displays the PNG Web Tuner dialog box, and gets the tuning options used by L_ColorResBitmap, L_FillBitmap, L_SaveBitmap and L_SetBitmapRgnColorRGBRange.

Parameter	Description
hWndOwner	Handle of the window, which owns the dialog.
pDlgParams	Pointer to a PNGWEBTUNERDLGPARAMS structure to be updated with the values entered by the user through the dialog. Set members of this structure, before calling this function, to set the dialog’s initial values.

Comments

The PNG Web Tuner dialog can be seen below:

$image\PNGWebTuner.gif$

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.

Required DLLs and Libraries

LTDLGWEB
LTDLGKRN
LTDLGUTL
LTDLGCTRL
LTDLGCOM
LTDIS
LTIMG
LTKRN

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:	L_DlgInit, L_SaveBitmap, L_DlgGIFWebTuner, L_DlgJPEGWebTuner
Topics:	Dialogs: HTML/Web
	Using Imaging Common Dialog

Example

Example 1:

// L_DlgPNGWebTuner

L_VOID ShowDialog ( HWND hWnd, pBITMAPHANDLE pBitmap )
{
   PNGWEBTUNERDLGPARAMS DlgParams ;

   memset ( &DlgParams, 0, sizeof ( PNGWEBTUNERDLGPARAMS ) ) ;

   DlgParams.uStructSize      = sizeof ( PNGWEBTUNERDLGPARAMS ) ;
   DlgParams.pBitmap    = pBitmap ;
   DlgParams.uDlgFlags  = DLG_PNGWEBTUNER_SHOW_EXPORT|
                          DLG_PNGWEBTUNER_SHOW_INFORMATION |
                          DLG_PNGWEBTUNER_SHOW_PREVIEW |
                          DLG_PNGWEBTUNER_SHOW_TOOL_ZOOMLEVEL |
                          DLG_PNGWEBTUNER_SHOW_TOOL_COLORPICKER |
                          DLG_PNGWEBTUNER_SHOW_TRANSPARENCY |
                          DLG_PNGWEBTUNER_SHOW_ADDWINDOWCOLOR ;

   L_DlgInit ( DLG_INIT_COLOR ) ;

   L_DlgPNGWebTuner ( hWnd, &DlgParams ) ;

   L_DlgFree ( ) ;
} ;

Example 2:

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,
   pBITMAPHANDLE pBitmap,
   LPPNGWEBTUNERDLGPARAMS pParam
)
{
   {// TRANSPERANCY

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

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

         crTransparentEnd   = AddTolerance ( pParam->crTransparent,
                                             pParam->nTransparencyTolerance ) ;
         // reset
         L_FreeBitmapRgn( pBitmap ) ;

         // set attributes
         pBitmap->Flags.Transparency = TRUE ;
         pBitmap->Transparency       = pParam->crTransparent ;

         // replace colors
         if ( pParam->nTransparencyTolerance >= 0 )
         {
            L_SetBitmapRgnColorRGBRange( pBitmap,
                                          crTransparentStart,
                                          crTransparentEnd,
                                          L_RGN_SET ) ;

            if ( L_BitmapHasRgn( pBitmap ) )
            {
               L_FillBitmap( pBitmap, pParam->crTransparent ) ;
            }

            L_FreeBitmapRgn( pBitmap ) ;
         }
      }

   }// TRANSPERANCY

   {// COLOR RESOLUTION

      L_UINT32 uFlags ;

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

         L_ColorResBitmap( pBitmap,
                            pBitmap,
                            sizeof(BITMAPHANDLE),
                            pParam->nBitsPerPixel,
                            uFlags,
                            NULL,
                            NULL,
                            pParam->nNumOfColors,
                            NULL,
                            NULL ) ;

      }

   }// COLOR RESOLUTION

   {// SAVE TO DISK

   L_SaveBitmap( szFileName,
                  pBitmap,
                  FILE_PNG,
                  pParam->nBitsPerPixel,
                  0,
                  NULL ) ;

   }// SAVE TO DISK
}

L_VOID ShowDialog ( HWND hWnd, pBITMAPHANDLE pBitmap )
{
   L_INT nRet ;
   PNGWEBTUNERDLGPARAMS DlgParams ;

   memset ( &DlgParams, 0, sizeof ( PNGWEBTUNERDLGPARAMS ) ) ;

   DlgParams.uStructSize      = sizeof ( PNGWEBTUNERDLGPARAMS ) ;
   DlgParams.pBitmap    = pBitmap ;
   DlgParams.uDlgFlags  = DLG_PNGWEBTUNER_SHOW_INFORMATION |
                          DLG_PNGWEBTUNER_SHOW_PREVIEW |
                          DLG_PNGWEBTUNER_SHOW_TOOL_ZOOMLEVEL |
                          DLG_PNGWEBTUNER_SHOW_TOOL_COLORPICKER |
                          DLG_PNGWEBTUNER_SHOW_TRANSPARENCY |
                          DLG_PNGWEBTUNER_SHOW_ADDWINDOWCOLOR ;

   L_DlgInit ( DLG_INIT_COLOR ) ;

   nRet = L_DlgPNGWebTuner ( hWnd, &DlgParams ) ;

   L_DlgFree ( ) ;

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