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#include "fivewin.ch"

#define CBM_INIT 4 && should move to prg header
#define DIB_RGB_COLORS 0 && should move to prg header

static hBmp
static oWnd
static hLib

function main()

local oBrush

hBmp := nil

hLib := LoadLibrary( "freeimage.dll" )

DEFINE BRUSH oBrush STYLE "NULL"

DEFINE WINDOW oWnd STYLE nOr( WS_POPUP ) BRUSH oBrush


ACTIVATE WINDOW oWnd MAXIMIZED ON INIT Proceso() ;
         ON PAINT Pinta( hDC )

FreeLibrary( hLib )

DeleteObject( hBmp )


return nil



function Proceso()

local hDib
local hInfoH, hBits, hInfo
local hWnd, hDC

// se puede hacer mas elegante pero esto es mas fácil
DibWrite( "screen.bmp",  DibFromBitmap( WndBitmap( oWnd:hWnd )))

hDib    := fiLoad( 0, "screen.bmp", 0 )
hDib    := FI_2GREY( hDib )

   hInfoH    := fiGetInfoHeader( hDib )
   hInfo     := fiGetInfo( hDib )
   hBits     := fiGetBits( hDib )

   hWnd      := oWnd:hWnd

   hDC       := oWnd:GetDC()
   hBmp      := CreateDIBitmap( hDC, hInfoH, CBM_INIT, hBits, hInfo,DIB_RGB_COLORS )

   oWnd:ReleaseDC()


oWnd:Refresh()
return nil


function pinta( hDC )

if hBmp != nil
   DrawBitmap( hDC, hBmp, 0, 0 )
endif
return nil






DLL32 STATIC FUNCTION FI_2GREY( hDib AS LONG ) AS LONG;
PASCAL FROM "_FreeImage_ConvertToGreyscale@4" LIB hLib

DLL32 STATIC FUNCTION FILOAD( nFormat AS LONG, cFileName AS LPSTR,nFlags AS LONG ) AS LONG;
PASCAL FROM "_FreeImage_Load@12" LIB hLib

DLL32 STATIC FUNCTION FIGETINFOHEADER( hDib AS LONG ) AS LONG;
PASCAL FROM "_FreeImage_GetInfoHeader@4" LIB hLib

DLL32 STATIC FUNCTION FIGETINFO( hDib AS LONG ) AS LONG;
PASCAL FROM "_FreeImage_GetInfo@4" LIB hLib

DLL32 STATIC FUNCTION FIGETBITS( hDib AS LONG ) AS LONG;
PASCAL FROM "_FreeImage_GetBits@4" LIB hLib

DLL32 STATIC FUNCTION CREATEDIBITMAP( hDC AS LONG, hInfoH AS LONG,nFlags AS LONG, hBits AS LONG, hInfo AS LONG, nUsage AS LONG ) AS LONG;
PASCAL FROM "CreateDIBitmap" LIB "gdi32.dll"

Code: Select all | Expand

#include "fivewin.ch"
#define ROSA rgb(255,0,255)

function main()

local o

DEFINE WINDOW o TITLE "Convertir a Escala de grises"


ACTIVATE WINDOW o ON PAINT Pinta( hDC )

return nil



function pinta( hDC )
local hDCMem := CreateCompatibleDC( hDC )
local hBmpMem, hOldBmp
local hIcon
local nTop, nLeft
local nColor
local nRojo, nVerde, nAzul


hBmpMem := CreateCompatibleBitmap( hDC, 34, 34 )
hOldBmp := SelectObject( hDCMem, hBmpMem )
FillSolidRect( hDCMem, {0,0,34,34}, ROSA )
hIcon := ExtractIcon( "FauxS-XP.ico") // Cualquiera vale
DrawIcon( hDCMem, 1, 1, hIcon )

for nTop := 1 to 32
    for nLeft := 1 to 32
        nColor := GetPixel( hDCMem, nTop, nLeft )
        if nColor == ROSA
           loop
        endif
        nRojo  := GetRValue( nColor )
        nVerde := GetGValue( nColor )
        nAzul  := GetBValue( nColor )
        nColor := Int(nRojo*0.3 + nVerde*0.59 + nAzul*0.11)
        SetPixel( hDCMem, nTop, nLeft, rgb( nColor, nColor, nColor) )
    next
next

SelectObject( hDCMem, hOldBmp )

DrawMasked( hDC, hBmpMem, 10, 50 )
DrawIcon( hDC, 10, 10, hICon )
DeleteObject( hBmpMem )
DeleteDC( hDCMem )
DestroyIcon( hICon )

return nil



#pragma BEGINDUMP

#include <windows.h>
#include <winuser.h>
#include <wingdi.h>
#include "hbapi.h"


HB_FUNC( CREATECOMPATIBLEBITMAP )
{
    hb_retnl( (LONG) CreateCompatibleBitmap( ( HDC ) hb_parnl( 1 ), hb_parni( 2 ), hb_parni( 3 ) ));

}

HB_FUNC( CREATECOMPATIBLEDC )
{
    hb_retnl( (LONG) CreateCompatibleDC( ( HDC ) hb_parnl( 1 )));

}

void FillSolidRectEx( HDC hDC, RECT *rct, COLORREF nColor )
{
    nColor = SetBkColor( hDC , nColor );
    ExtTextOut( hDC, 0, 0, ETO_OPAQUE, rct, NULL, 0, NULL);
    SetBkColor( hDC, nColor );
}



HB_FUNC( FILLSOLIDRECT )
{
    RECT rct;
    COLORREF nColor = hb_parnl( 3 );
    rct.top    = hb_parni( 2, 1 );
    rct.left   = hb_parni( 2, 2 );
    rct.bottom = hb_parni( 2, 3 );
    rct.right  = hb_parni( 2, 4 );

    FillSolidRectEx( (HDC) hb_parnl( 1 ), &rct, nColor );
}


#pragma ENDDUMP



static function GetRValue( nRGB )
return nLoByte( nLoWord( nRGB ) )

static function GetGValue( nRGB )
return nHiByte( nLoWord( nRGB ) )

static function GetBValue( nRGB )
return nLoByte( nHiWord( nRGB ) )