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L_DlgPNGWebTuner

Summary

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

Syntax

#include "l_bitmap.h"

L_LTDLG_API L_INT L_DlgPNGWebTuner(hWndOwner, pDlgParams)

Parameters

L_HWND hWndOwner

Handle of the window, which owns the dialog.

LPPNGWEBTUNERDLGPARAMS 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 dialogs initial values.

Comments

The PNG Web Tuner dialog.

Returns

Value	Meaning
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

Example

// Example 1: 
L_INT DlgPNGWebTunerFirstExample(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_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   ; 
 
   nRet = L_DlgInit ( DLG_INIT_COLOR ) ; 
   if(nRet != SUCCESS && nRet != ERROR_DLG_ALREADYINITIATED) 
      return nRet; 
 
   nRet = L_DlgPNGWebTuner ( hWnd, &DlgParams ) ; 
   if(nRet < 1) 
      return nRet; 
 
   nRet = L_DlgFree ( ) ; 
   if(nRet != SUCCESS) 
      return nRet; 
   return SUCCESS; 
} ; 
 
// Example 2: 
static 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 ) ; 
} 
 
static L_VOID ExportBitmap(L_TCHAR*                 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_INT DlgPNGWebTunerSecondExample(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   ; 
 
   nRet = L_DlgInit ( DLG_INIT_COLOR ) ; 
   if(nRet != SUCCESS && nRet != ERROR_DLG_ALREADYINITIATED) 
      return nRet; 
   nRet = L_DlgPNGWebTuner ( hWnd, &DlgParams ) ; 
   L_DlgFree () ; 
 
   if ( SUCCESS_DLG_OK == nRet ) 
   { 
      ExportBitmap (MAKE_IMAGE_PATH(TEXT("tuned.gif")), pBitmap, &DlgParams ) ; 
   } 
   else 
      if( nRet < 1 ) 
         return nRet; 
   return SUCCESS;  
}