directfb를 이용하여 선그리기

DirectFB를 이용하여 임베디드 시스템에 GUI를 구현하려고 합니다.
임베디드 시스템에 쓰기전에 PC에서 써보려고 DirectFB를 설치하고
DirectFB.org에 있는 tutorial코드를 끌어와 실행했습니다.
소스는 풀스크린으로 전환후 붉은색 대각선을 그리는 프로그램입니다.
컴파일 후 실행을 하니, 풀스크린으로는 전환이 되는데 선이 안그려 지네요..
휴.. 소스코드에 컴파일에러는 없군요. 프로그램 설치를 잘못했는건지, 아니면 다른것이 잘 못되었는건지.. 난감하군요..ㅡㅡ;;;
소스코드와 프로그램 실행중 나타나는 메제시를 밑에 남깁니다.

메세지:

[root@jo workspace]# gcc `pkg-config --cflags directfb` -o test Directfb.c `pkg-config --libs directfb` -g
[root@jo workspace]# ./test

---------------------- DirectFB v0.9.22 ---------------------
(c) 2000-2002 convergence integrated media GmbH
(c) 2002-2004 convergence GmbH
-----------------------------------------------------------

(*) DirectFB/Core: Single Application Core. (2005-04-04 12:32)
(*) Direct/Memcpy: Using MMXEXT optimized memcpy()
(*) Direct/Thread: Running 'VT Switcher' (CRITICAL, 6428)...
(*) Direct/Thread: Running 'PS/2 Input' (INPUT, 6451)...
(!!!) *** UNIMPLEMENTED [fusion_reactor_set_lock] *** [reactor.c:802]
(*) DirectFB/Input: IMPS/2 Mouse 1.0 (Convergence GmbH)
(*) Direct/Thread: Running 'Keyboard Input' (INPUT, 6452)...
(*) DirectFB/Input: Keyboard 0.9 (convergence integrated media GmbH)
(*) Direct/Thread: Running 'Linux Input' (INPUT, 6453)...
(*) DirectFB/Input: AT Translated Set 2 keyboard (1) 0.1 (convergence integrated media GmbH)
(*) Direct/Thread: Running 'Linux Input' (INPUT, 6454)...
(*) DirectFB/Input: PS/2 Generic Mouse (2) 0.1 (convergence integrated media GmbH)
(*) Direct/Thread: Running 'Linux Input' (INPUT, 6455)...
(*) DirectFB/Input: 055d:1030 (3) 0.1 (convergence integrated media GmbH)
(*) DirectFB/Genefx: MMX detected and enabled
(*) DirectFB/Graphics: MMX Software Rasterizer 0.6 (convergence integrated media GmbH)
(*) DirectFB/Core/WM: Default 0.2 (Convergence GmbH)
(!!!) *** WARNING [fbdev driver possibly buggy] *** [fbdev.c:1609 in dfb_fbdev_set_mode()]
(!!!) *** ONCE [unsupported destination format] *** [generic.c:5077 in gAcquire()]

소스코드

#include <stdio.h>
#include <unistd.h>

#include <directfb.h>

static IDirectFB *dfb = NULL;
static IDirectFBSurface *primary = NULL;

static int screen_width = 0;
static int screen_height = 0;


#define DFBCHECK(x...)                                         \
{                                                              \
        DFBResult err = x;                                         \
                                                                                                   \
        if (err != DFB_OK)                                         \
        {                                                              \
                fprintf( stderr, "%s <%d>:\n\t", __FILE__, __LINE__ ); \
                DirectFBErrorFatal( #x, err );                         \
        }                                                          \
}


int main(int argc, char **argv)
{
        DFBSurfaceDescription dsc;

        DFBCHECK(DirectFBInit (&argc, &argv));

        DFBCHECK(DirectFBCreate (&dfb));

        DFBCHECK(dfb->SetCooperativeLevel (dfb,DFSCL_FULLSCREEN));

        dsc.flags = DSDESC_CAPS;
        dsc.caps = DSCAPS_PRIMARY | DSCAPS_FLIPPING;

        DFBCHECK(dfb->CreateSurface(dfb,&dsc,&primary));
        DFBCHECK(primary->GetSize(primary,&screen_width, &screen_height));
        DFBCHECK(primary->FillRectangle(primary,0,0,screen_width,screen_height));
        DFBCHECK (primary->SetColor (primary, 0xff, 0x00, 0x00, 0xff));
        DFBCHECK (primary->DrawLine (primary,0,0, screen_width,screen_height ));

        DFBCHECK (primary->Flip (primary, NULL, 0));
        sleep (5);
        primary->Release( primary );
        dfb->Release( dfb );

        return 23;
}