I downloaded pygtk0.6.3 (because I only had 0.6.1 before, and it didn't do
gdkrgb stuff).
When I run the following program :
from gtk import *
from GDK import *
def expose_event(da, event):
grey_data="\000\177\377\377\177\000"
gc=da.get_style().fg_gc[STATE_NORMAL]
da.draw_gray_image(gc, 0, 0, 128, 128, RGB_DITHER_NORMAL, grey_data,3)
return FALSE
win=GtkWindow()
da=GtkDrawingArea()
da.size(3,2)
da.connect("expose_event", expose_event)
da.show()
win.add(da)
win.show()
mainloop()
I get the error : Illegal instruction (core dump)
I froze my python program, ran it again and dumped the stack with dbx. Here
is the result:
(dbx) where
warning: could not locate trace table from starting address 0x0
gdk_draw_rgb_image_core(0x20165288, 0x20162618, 0x0, 0x0, 0x80, 0x80,
0x201251ac, 0x1), line 3008 in "gdkrgb.c"
gdk_draw_gray_image(0x20165288, 0x20162618, 0x0, 0x0, 0x80, 0x80, 0x1,
0x201251ac), line 3120 in "gdkrgb.c"
_wrap_gdk_draw_gray_image(0x0, 0x20145708) at 0x10039e84
call_builtin(??, ??, ??) at 0x1001f04c
PyEval_CallObjectWithKeywords(??, ??, ??) at 0x10022b94
eval_code2(??, ??, ??, ??, ??, ??, ??, ??) at 0x10021cf8
eval_code2(??, ??, ??, ??, ??, ??, ??, ??) at 0x10021bd0
call_function(??, ??, ??) at 0x1001eec0
PyEval_CallObjectWithKeywords(??, ??, ??) at 0x10022b80
builtin_apply(??, ??) at 0x102a2e54
call_builtin(??, ??, ??) at 0x1001f04c
PyEval_CallObjectWithKeywords(??, ??, ??) at 0x10022b94
eval_code2(??, ??, ??, ??, ??, ??, ??, ??) at 0x10021cf8
call_function(??, ??, ??) at 0x1001eec0
PyEval_CallObjectWithKeywords(??, ??, ??) at 0x10022b80
PyObject_CallObject(??, ??) at 0x10026bb4
PyGtk_CallbackMarshal(0x20160af8, 0x20142f38, 0x1, 0x2ff20a48) at 0x1007dbdc
unnamed block $b499, line 1898 in "gtksignal.c"
gtk_handlers_run(0x2025cb68, 0x2ff20990, 0x20160af8, 0x2ff20a48, 0x0), line
1898 in "gtksignal.c"
unnamed block $b504, line 1469 in "gtksignal.c"
gtk_signal_real_emit(0x20160af8, 0x19, 0x2ff20a48), line 1469 in
"gtksignal.c"
gtk_signal_emit(0x20160af8, 0x19, 0x2ff20e20, 0x2ff20da0, 0x20145798, 0x0,
0x2011582c, 0x0), line 552 in "gtksignal.c"
gtk_widget_event(0x20160af8, 0x2ff20e20), line 2790 in "gtkwidget.c"
gtk_widget_real_draw(0x20160af8, 0x2ff21364), line 4530 in "gtkwidget.c"
gtk_marshal_NONE__POINTER(0x20160af8, 0x20115904, 0x0, 0x2ff20f98), line 225
in "gtkmarshal.c"
gtk_signal_real_emit(0x20160af8, 0x8, 0x2ff20f98), line 1432 in
"gtksignal.c"
gtk_signal_emit(0x20160af8, 0x8, 0x2ff21364, 0x0, 0x0, 0x8, 0x80000, 0x0),
line 552 in "gtksignal.c"
gtk_widget_draw(0x20160af8, 0x2ff21364), line 2312 in "gtkwidget.c"
gtk_bin_draw(0x20145808, 0x202600dc), line 175 in "gtkbin.c"
gtk_window_draw(0x20145808, 0x202600dc), line 1722 in "gtkwindow.c"
gtk_marshal_NONE__POINTER(0x20145808, 0x20115214, 0x0, 0x2ff21528), line 225
in "gtkmarshal.c"
gtk_signal_real_emit(0x20145808, 0x8, 0x2ff21528), line 1432 in
"gtksignal.c"
gtk_signal_emit(0x20145808, 0x8, 0x202600dc, 0x0, 0x0, 0x10, 0x20167510,
0x2ff21918), line 552 in "gtksignal.c"
gtk_widget_draw(0x20145808, 0x202600dc), line 2312 in "gtkwidget.c"
unnamed block $b686, line 2235 in "gtkwidget.c"
unnamed block $b685, line 2235 in "gtkwidget.c"
gtk_widget_idle_draw(0x0), line 2235 in "gtkwidget.c"
g_idle_dispatch(0x201157e4, 0x2ff21a88, 0x0), line 1348 in "gmain.c"
unnamed block $b866, line 652 in "gmain.c"
unnamed block $b865, line 652 in "gmain.c"
g_main_dispatch(0x2ff21a88), line 652 in "gmain.c"
g_main_iterate(0x1, 0x1), line 870 in "gmain.c"
g_main_run(0x20162018), line 928 in "gmain.c"
gtk_main(), line 475 in "gtkmain.c"
_wrap_gtk_main(0x0, 0x2011ef08) at 0x10073cc0
call_builtin(??, ??, ??) at 0x1001f04c
PyEval_CallObjectWithKeywords(??, ??, ??) at 0x10022b94
eval_code2(??, ??, ??, ??, ??, ??, ??, ??) at 0x10021cf8
eval_code2(??, ??, ??, ??, ??, ??, ??, ??) at 0x10021bd0
PyEval_EvalCode(??, ??, ??) at 0x10022524
PyImport_ExecCodeModuleEx(??, ??, ??) at 0x10094134
PyImport_ImportFrozenModule(??) at 0x100931cc
Py_FrozenMain(??, ??) at 0x100003b4
main(??, ??) at 0x1000026c
(dbx)
I'm starting to think there is something wrong with my gtk libraries.
(Although everything
I've used so far worked fine).
I looked for a C example that uses gdkrgb, to validate that my gtk libraries
are okay,
but I could'nt find any.
I'm on AIX4.2 and I'm using gtk 1.2.3
Do you have any ideas ?
Thanks
Remi.
PS : What's the last argument to draw_gray_image (rowstride) ?
If I give a different width and height for the image than its original
size, is
it going to expand/shrink the image, or crop it ?
> -----Original Message-----
> From: James Henstridge [mailto:[EMAIL PROTECTED]]
> Sent: Monday, October 18, 1999 6:59 PM
> To: [EMAIL PROTECTED]
> Subject: Re: [pygtk] Greyscale images with imlib
>
>
> I don't know if it does grey scale images (it may convert
> them to 24 bit
> RGB internally if you load one from a file). The
> create_image_from_data()
> routine expects 24-bit RGB image data as well. If all you
> want to do is
> display greyscale data to the screen, you could use the
> gdkrgb code (which
> does handle greyscale images -- it is the display code gimp uses).
>
> You use the draw_gray_image() function in gtk.py for this.
> It can draw to
> any GdkWindow. The GtkDrawingArea widget is probably the one
> you would
> want to draw on. The GtkDrawingArea also has all the
> draw_*() functions
> as methods to make things a bit easier. Here is a bit of
> example code:
>
> grey_data = "\000\177\377\377\177\000"
>
> da = GtkDrawingArea()
> da.size(3,2)
>
> def expose_event(da, event):
> da.draw_gray_image(da.get_style[STATE_NORMAL].white_gc,
> 0,0, 3,2, GDK.RGB_DITHER_NORMAL,
> grey_data, 3)
> return FALSE
> da.connect("expose_event", expose_event)
>
> This code can probably be optimised by looking at the area
> that should be
> redrawn and only drawing it without much trouble. There is also a
> draw_array() function that will render a Numeric Python array to a
> drawable. It takes a nxm or nxmx1 array of unsigned bytes
> (interpreted as
> grey data) or a nxmx3 or nxmx4 array of unsigned bytes
> (interpreted as RGB
> data). It will also handle arrays that have been sliced
> along the first
> two axes, if you only want to display only part of the data.
> This gives
> you all the power of numpy for manipulating the data as well.
> Note that
> pygtk/gnome-python must have been compiled after numpy for
> this code to be
> enabled.
>
> James.
>
> --
> Email: [EMAIL PROTECTED]
> WWW: http://www.daa.com.au/~james/
>
>
> On Mon, 18 Oct 1999, Remi Delon wrote:
>
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