Hello, Attilio
Thank very much for your response.
I have tried serverl tests and I found I can show
button on the window when I tried the following codes
gtk_button_set_image(GtkButton *button,
GtkWidget
*image);
instead of
gtk_button_new(void);
I could see a button with image on it although the
image
shown wan't clear.
And then in gdkvisual-directfb.c
static DFBSurfacePixelFormat formats[] =
{
DSPF_ARGB,
DSPF_LUT8,
DSPF_RGB32,
DSPF_RGB24,
DSPF_RGB16,
DSPF_ARGB1555,
DSPF_RGB332
};
if (acc & DFXL_BLIT || formats[i] == dlc.pixelformat)
{
system_visual = GDK_VISUAL (visuals[c]);
c++;
}
I found this piece of code will choose DSPF_ARGB1555
as
the system_visual according to my gfxdriver capability
in directfb. After I changed the system_visual to
DSPF_RGB16, the image on the button was fine and
clear.
But I still can't figure it out why I can't see
button (or any widget) on my window...using the
following code..
gtk_button_new(void);
Does someone have any clues about this situation or
know the flow of drawing operations of widgets on
directfb ?
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