[cairo] Overlay problem for two texts

[Eric Feillant]

I thank Martin (martinfischer8 at t-online.de) for responding me and fixed 
the problem in my first question.


I have another problem for some days still with Cairo when overlaying 
texts, i probably forgeth something or do not understand some others 
tricks in CAIRO.

In my program i've to display several text strings on a png image.

The first one for player1 (Scoreboard image)

The second one for player 2 wich is the same code.


It is as if the second text was creating a new full image and deleting 
the first text.


Cairo code start like this :

// START CAIRO HEAD

cairo_surface_t *surface;
         cairo_t *cr;

         surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 600, 
400);
         cr = cairo_create(surface);
         cairo_set_source_rgb(cr, 0.7, 0.3, 0.2);
         cairo_set_operator (cr, CAIRO_OPERATOR_SOURCE);
         cairo_paint(cr);

         cairo_select_font_face(cr, "Sans", 
CAIRO_FONT_SLANT_NORMAL,CAIRO_FONT_WEIGHT_NORMAL);
         cairo_set_font_size(cr, 20.0);
         cairo_set_source_rgb(cr, 1.0, 1.0, 0.1);

// END CAIRO HEAD


For some reasons i ignore, displaying datas for player2 is ok,

But the first pass in the program for player 1 never works, Even if a 
"printf" is right displayed on my screen.

See this :

  if(joueur->num == 1)
                 {
                 char * joueur1 = joueur[joueur->num-1].nom;
                 printf("%s\t", joueur1);  // joueur1 name is displayed 
on screen
                 cairo_move_to(cr, 10, 50);
                 cairo_show_text(cr, joueur1); // *this is never on the 
PNG image Cairo writes*
}

later in the program i have for player2 the same code :

  if(joueur->num == 2)
                 {
                 char * joueur2 = joueur->nom;
                 printf("%s\t", joueur2);
                 cairo_move_to(cr, 10, 120);
                 cairo_show_text(cr, joueur2); // *No problem, text is 
in the PNG image*


             }

// END CAIRO CODE
         cairo_surface_write_to_png(surface, "image.png");
         cairo_destroy(cr);
         cairo_surface_destroy(surface);


Thanks in advance for your help.
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