I took the following code from a tutorial on directfb web site.
It compiles and links but does not work
I noticed that it resets the monitor not the tv connected to my tvout.
When I "modprobe fbcon" then I see the tv briefly clear.
So I conclude that a console must be bound to the framebuffer for this
directfb to work.
Is this assumption correct?
Is there any library that will allow me to put text on a framebuffer
that is not bound to the console?
This is the error message
------------------------------
pvr include # ./prang
---------------------- DirectFB v0.9.25 ---------------------
(c) 2000-2002 convergence integrated media GmbH
(c) 2002-2004 convergence GmbH
-----------------------------------------------------------
(*) DirectFB/Core: Single Application Core. (2008-01-13 00:42)
(*) Direct/Memcpy: Using MMXEXT optimized memcpy()
(*) Direct/Thread: Running 'VT Switcher' (CRITICAL, 12282)...
(*) Direct/Thread: Running 'Keyboard Input' (INPUT, 12283)...
(!!!) *** UNIMPLEMENTED [fusion_reactor_set_lock] *** [reactor.c:853]
(*) DirectFB/Input: Keyboard 0.9 (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)
demo1.c <35>:
(#) DirectFBError [dfb->CreateFont (dfb,
"/usr/share/fonts/ttf-bitstream
-vera/Vera.ttf", &font_dsc, &font)]: No (suitable) implementation found!
(!!!) *** WARNING [Application exited without deinitialization of
DirectFB!] *
** [core.c:741 in dfb_core_deinit_check()]
----------------------------------------------------------
#include <stdio.h>
#include <stdlib.h>
#include <string.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 ); \
} \
}
static IDirectFBFont *font = NULL;
static char *text = "DirectFB rulez!";
int main (int argc, char **argv) {
int i, width;
DFBFontDescription font_dsc;
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));
font_dsc.flags = DFDESC_HEIGHT;
font_dsc.height = 48;
DFBCHECK (dfb->CreateFont (dfb,
"/usr/share/fonts/ttf-bitstream-vera/Vera.ttf", &font_dsc, &font));
DFBCHECK (primary->SetFont (primary, font));
DFBCHECK (font->GetStringWidth (font, text, -1, &width));
for (i = screen_width; i > -width; i--) {
DFBCHECK (primary->SetColor (primary, 0x0, 0x0, 0x0,
0xFF));
DFBCHECK (primary->FillRectangle (primary, 0, 0,
screen_width, screen_height));
DFBCHECK (primary->SetColor (primary, 0x80, 0x0, 0x20,
0xFF));
DFBCHECK (primary->DrawString (primary, text, -1, i,
screen_height / 2, DSTF_LEFT));
DFBCHECK (primary->Flip (primary, NULL,
DSFLIP_WAITFORSYNC));
}
font->Release (font);
primary->Release (primary);
dfb->Release (dfb);
return 23;
}
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