Re: Pango Integration?

[Noah Levitt <nlevitt columbia edu>]

gtk_init tries to open the X display.

You don't need to use gtk+ for this program at all (neither
does Attin Cotteral). You can create a PangoContext the way
pangoft2topgm.c does:

  fontmap = pango_ft2_font_map_new ();
  pango_ft2_font_map_set_resolution (PANGO_FT2_FONT_MAP (fontmap), 96, 96);
  context = pango_ft2_font_map_create_context (PANGO_FT2_FONT_MAP (fontmap));

Noah

On Fri, Sep 19, 2003 at 14:45:23 -0700, Zitan Broth wrote:
> Greetings All,
>  
> I'm having a problem calling Pango from PHP, which is most likely PHP related, but I thought you all might be able to help me - at least interpret the error I am getting.  The php-gtk project haven't worked with GTK 2.0 yet so ....
> 
> I have some c code (a **special** thanks to Attin Cotteral for this) which accesses Pango to find out what the width is of a given string with font and font size.  Works well when called from the command line, and I've included the code and compile instructions below :-)
>  
> When I call this program from PHP it gives me the output:
>  ./pango/pango_get_width "arial 12" "bumpylove"
> (pango_get_width:5039): Gtk-WARNING **: cannot open display:
> Got fontname 'arial 12'
> Got input text 'bumpylove' 
> 
> What I'm wondering is what the Gtk-WARNING means?  This has been rather a large headache so any help is **hugely** appreciated :-)
> 
> Thanks to all,
> Zitan.
> 
> 
> /*
> pango_get_width
> 
> Compile Instructions: 
> 
> gcc `pkg-config --cflags gtk+-2.0` pango_get_width.c \
>  `pkg-config --libs gtk+-2.0` 
>    
> */
> #include <stdio.h>
> #include <stdlib.h>
> #include <string.h>
> #include <gtk/gtk.h>
> 
> /* Written by Attin Cotteral */
> static gint char_width_from_layout (PangoFontDescription *pfd, const gchar *s)
> {
>     GtkWidget *w;
>     PangoContext *pc;
>     PangoLayout *pl;
>     gint width;
> 
>     w = gtk_label_new(NULL);
>     pc = gtk_widget_get_pango_context(w);
>     pango_context_set_font_description(pc, pfd);
> 
>     pl = pango_layout_new(pc);
>     pango_layout_set_text(pl, s, -1);
>     pango_layout_get_pixel_size(pl, &width, NULL);
> 
>     g_object_unref(G_OBJECT(pl));
>     g_object_unref(G_OBJECT(pc));
>     gtk_widget_destroy(w);
> 
>     return width;
> }
> 
> int main (int argc, char *argv[])
> {
>     gint i, width;
>     gchar fontname[128];
>     gchar inputtext[255];
>     gchar width_output[255];
>   
>     PangoFontDescription *pfd;
> 
>     if (argc < 2) {
>       fprintf(stderr, "%s: error fontname < 128 chars\n",argv[0]);
>       exit(EXIT_FAILURE);
>     }
> 
>     *fontname = 0;
>   
>    strcpy(fontname, argv[1]);
>    strcpy(inputtext, argv[2]);
>    i = 2;
>    printf("Got fontname '%s', %d\n", fontname,i);
>  
>    gtk_init(&argc, &argv);
>   
>    pfd = pango_font_description_from_string(fontname);
> 
>     width = char_width_from_layout(pfd, inputtext);
>     
>     printf("Got char width of %d\n", width);
> 
>    return 0;
> }
> 
>