SDL_surface as gtk widget

SDL Development
#1

Cheers all,

I am trying to figure out how to convert a 32bit RGBA SDL surface (i.e.
the pixel data of a surface) into a GtkWidget (i.e. a GtkImage).

This is not entirely SDL related - but I though someone might have done
that before and it doesn’t hurt to ask.

Bye
Andreas

#2

Hi,

In reply to myself, some helpful chap from the gtk mailing list gave me
the insight.

Here is the code:

/* Drawing callback */
int gtkFloatExposeEvent (GtkWidget *widget, GdkEventExpose *event,
gpointer data)
{
SDL_Surface *image=(SDL_Surface *)data;

gdk_window_clear_area (widget->window, event->area.x, event->area.y,
event->area.width, event->area.height);
gdk_gc_set_clip_rectangle (widget->style->fg_gc[widget->state],
&event->area);
gdk_draw_rgb_32_image(widget->window,
widget->style->fg_gc[widget->state],0,0,image->w, image->h,
GDK_RGB_DITHER_NORMAL,image->pixels,image->pitch);
gdk_gc_set_clip_rectangle (widget->style->fg_gc[widget->state],NULL);
return 1;
}

…
/* Create window /
float_window = gtk_window_new(GTK_WINDOW_POPUP);
gtk_widget_realize(GTK_WIDGET(float_window));
gtk_widget_set_usize(GTK_WIDGET(float_window),source->image->w,source->image->h);
gtk_widget_set_uposition(GTK_WIDGET(float_window),x,y);
/ Add drawing area */
drawing_area = gtk_drawing_area_new();
gtk_drawing_area_size (GTK_DRAWING_AREA
(drawing_area),source->image->w, source->image->h);
gtk_signal_connect (GTK_OBJECT (drawing_area), “expose_event”,
GTK_SIGNAL_FUNC(gtkFloatExposeEvent), (void )source->image);
gtk_widget_show(drawing_area);
gtk_container_add(GTK_CONTAINER(float_window), drawing_area);
/ Show popup */
gtk_widget_show(float_window);
…

Maybe its helpful to someone else.

Ciao
Andreas

Andreas Schiffler wrote:>

Cheers all,

I am trying to figure out how to convert a 32bit RGBA SDL surface (i.e.
the pixel data of a surface) into a GtkWidget (i.e. a GtkImage).

This is not entirely SDL related - but I though someone might have done
that before and it doesn’t hurt to ask.

Bye
Andreas