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#include "FiveWin.ch"

STATIC oWnd, oBmp

FUNCTION Main()
   local oBar
   local cFile := ""
   local lSetAlpha := .t.
   

   DEFINE WINDOW oWnd FROM 0,0 TO 20,50 TITLE "Test READING PNG IMAGE"
   
   define buttonbar oBar of oWnd size 48,48
   define button prompt "File" of oBar action( LoadPng( oBmp ), oBmp:HasAlpha(), oBmp:Refresh() ) CENTER
   define button prompt "transp ON" of oBar action( oBmp:lTransparent := .T., oBmp:refresh() ) CENTER
   define button prompt "transp OFF" of oBar action( oBmp:lTransparent := .F., oBmp:refresh() ) CENTER
   define button prompt "Adjust ON" of oBar action( oBmp:lStretch := .T., oBmp:refresh() ) CENTER
   define button prompt "Adjust OFF" of oBar action( oBmp:lStretch := .F., oBmp:refresh() ) CENTER
   define button prompt "HasAlpha" of oBar action( MsgInfo( oBmp:HasAlpha() ) ) CENTER
   define button prompt "level" of oBar action( oBmp:nAlphaLevel += 50, oBmp:refresh() ) CENTER
      @ 0,0 BITMAP oBmp FILENAME cFile OF oWnd ;
         PIXEL SCROLL
      WndCenter(oWnd:hWnd)


   ACTIVATE WINDOW oWnd ;
      ON PAINT ( oBmp:aDjClient(), oBmp:ScrollAdjust() ) ;
      ON RESIZE ( oBmp:aDjClient(), oBmp:ScrollAdjust() )

RETURN ( nil )

function LoadPng( oBmp )
   
   local cFile := cGetFile( "*.png","Select File" )
   local hPng
   
   if !Empty( cFile  )
      hPng = FWOpenPngFile( cFile )
      if IsGdiObject( hPng )
         if IsGdiObject( oBmp:hBitmap )
            DeleteObject( oBmp:hBitmap )
         endif
         oBmp:hBitmap = hPng
         oBmp:Refresh()
      endif
   endif
   
return nil
 

   if ! Empty( cBmpFile1 )
      if File( cBmpFile1 )
         if Upper( Right( cBmpFile1, 3 ) ) == "PNG"
            ::hBitmap1  = FWOpenPngFile( cBmpFile1 )
            ::hPalette1 = 0
         else
            ::cBmpFile1 = cBmpFile1
            aBmpPal     = PalBmpRead( ::GetDC(), cBmpFile1 )
            ::hBitmap1  = aBmpPal[ 1 ]
            ::hPalette1 = aBmpPal[ 2 ]
         endif
         ::HasAlpha( ::hBitmap1, BTN_UP )
//         ::ReleaseDC()
      endif
   endif

#pragma BEGINDUMP
#include <windows.h>
#include <hbapi.h>

HB_FUNC( ISGDIOBJECT )
{
    hb_retl( IsGDIObject( ( HANDLE ) hb_parnl( 1 ) ) );
}
#pragma ENDDUMP