GTK+ Forums

croco · Joined: 04 Jan 2008 Posts: 4

Sorry, Murphy didn't change in 2008. 2 hours tracked for a bug, nothing found, posted the problem, 2 minutes later the bug was found ... I referred to a pixmap, not the image.

Anyway: What means this g_assert_not_reached incident in general? Has anybody an idea?

cu

Croco

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Hi folks!

Glib 2.12, GTK 2.10 for Windows:

I'm quite new to GTK and about to work with 2D graphics in drawing areas. I have some trouble to readout single pixmap pixels (and to set their color as well). Hence I couldn't find some method to do this directly on pixmaps, I convert the pixmaps to images in order to use gdk_image_get_pixel() afterwards as it is described in an example code here in the forum. Unfortunatly GDK replies my effort with a strange message:

"Gdk-Error **: file gdkimage-win32.c: line 317 (gdk_image_get_pixel): should not be reached
aborting..."

Here the code:

Code: (Plaintext)

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Function omagtk_pixmap_getpixel(obj as tomagtk_pixmap ptr, x as integer, y as integer) as guint32

dim as GdkImage ptr img
dim as guint32 retval

img=gdk_drawable_get_image(obj->pix,0,0,obj->nx,obj->ny)
if (obj->pix=NULL) then brkmess("Error in omagtk_pixmap_getpixel(): pixmap not initialized")
if (x<0 or x>obj->nx-1 or y<0 or y>obj->nx-1) then brkmess("Error in omagtk_pixmap_getpixel(): coordinates boundary error")
retval= gdk_image_get_pixel(obj->pix, x , y )
Function=retval

End Function

Has anybody an idea what's going wrong here? Thank you very much in advance!

Croco

rdo · Posted: Fri Jan 04, 2008 10:39 pm Post subject:

Hi! You marked this as solved but I found some info on "g_assert_not_reached()"

From http://developer.gnome.org/doc/GGAD/cha-glib.html
g_assert_not_reached() should be used to mark "impossible" situations...

Also, what programming language is that? It looks like some form of basic.

Good luck.

Micah Carrick · Posted: Sat Jan 05, 2008 12:15 am Post subject:

Oh that does look like Basic.... is there a basic wrapper for GTK I'm not aware of?

croco · Joined: 04 Jan 2008 Posts: 4

It's Freebasic:
http://www.freebasic.net

Originally some kind of 32-bit successor of good old QuickBasic, it works on Linux as well and has now roughly the capabilities of C and there are binding for some dozen of libs like OpenGL, Newton, SDL, MySQL, Allegro, Lua, GTK and many more.

Cu

Croco