print text using pango renderer

- the text is sent to postscript as a bitmap
- this fixes printing of non-ascii characters

http://sourceforge.net/tracker/index.php?func=detail&aid=2836135&group_id=222125&atid=1054680

diff --git a/src/print.c b/src/print.c
index ec2a239..366f69f 100644 (file)
--- a/src/print.c
+++ b/src/print.c
@@ -1336,93 +1336,44 @@ static gboolean print_job_ps_page_image(PrintWindow *pw, GdkPixbuf *pixbuf,
        return ret;
 }
 
-static const gchar *ps_text_to_hex_array(FILE *f, const gchar *text, gdouble x, gdouble y)
-{
-       static gchar hex_digits[] = "0123456789abcdef";
-       const gchar *p;
-
-       if (!text) return NULL;
-
-       g_fprintf(f, "%f %f moveto\n", x, y);
-       g_fprintf(f, "<");
-
-       /* fixme: convert utf8 to ascii or proper locale string.. */
-
-       p = text;
-       while (*p != '\0' && *p != '\n')
-               {
-               gchar text[3];
-
-               text[0] = hex_digits[*p >> 4];
-               text[1] = hex_digits[*p & 0xf];
-               text[2] = '\0';
-
-               g_fprintf(f, "%s", text);
-
-               p++;
-               }
-
-       g_fprintf(f, ">\n");
-       g_fprintf(f, "dup stringwidth pop 2 div neg 0 rmoveto show\n");
-
-       return p;
-}
-
-static void ps_text_parse(FILE *f, const gchar *text, gdouble x, gdouble y, gdouble point_size)
-{
-       const gchar *p;
-
-       if (!text) return;
-
-       g_fprintf(f, "newpath\n");
-
-       p = text;
-       while (p && *p != '\0')
-               {
-               p = ps_text_to_hex_array(f, p, x, y);
-               if (p && *p == '\n') p++;
-               y -= point_size;
-               }
-
-       g_fprintf(f, "closepath\n");
-}
+static gdouble convert_pango_dpi(gdouble points);
 
 static gboolean print_job_ps_page_text(PrintWindow *pw, const gchar *text, gdouble point_size,
                                       gdouble x, gdouble y, gdouble width,
                                       guint8 r, guint8 g, guint8 b)
 {
-       FILE *f;
-       PipeError *pe;
-       gchar *lc_pointer;
+       PangoLayout *layout;
+       PangoFontDescription *desc;
+       GdkPixbuf *pixbuf;
+       gint lw, lh;
        gboolean ret;
+       gdouble scale_to_max_dpi = (pw->max_dpi >= PRINT_PS_DPI_MIN) ? pw->max_dpi / 72.0 : 1200.0 / 72.0;
 
-       if (!text) return TRUE;
-
-       f = print_job_ps_fd(pw);
-       if (!f) return FALSE;
-
-       lc_pointer = g_strdup(setlocale(LC_NUMERIC, NULL));
-       setlocale(LC_NUMERIC, POSTSCRIPT_LOCALE);
+       layout = gtk_widget_create_pango_layout(pw->dialog->dialog, NULL);
 
-       pe = pipe_handler_new();
+       desc = pango_font_description_new();
+       pango_font_description_set_size(desc, convert_pango_dpi(point_size) * PANGO_SCALE * scale_to_max_dpi);
+       pango_layout_set_font_description(layout, desc);
+       pango_font_description_free(desc);
 
-       g_fprintf(f, "/Sans findfont\n");
-       g_fprintf(f, "%f scalefont\n", point_size);
-       g_fprintf(f, "setfont\n");
+       pango_layout_set_alignment(layout, PANGO_ALIGN_CENTER);
+       pango_layout_set_text(layout, text, -1);
 
-       g_fprintf(f, "%f %f %f setrgbcolor\n", (gdouble)r / 255.0, (gdouble)g / 255.0, (gdouble)b / 255.0);
-       ps_text_parse(f, text, x, pw->layout_height - y - point_size, point_size);
+       pango_layout_get_pixel_size(layout, &lw, &lh);
+       x = x - (gdouble)lw / 2.0 / scale_to_max_dpi;
 
-       ret = !pipe_handler_check(pe);
-       pipe_handler_free(pe);
+       pixbuf = gdk_pixbuf_new(GDK_COLORSPACE_RGB, TRUE, 8, lw, lh);
+       gdk_pixbuf_fill(pixbuf, 0xffffffff);
+       pixbuf_draw_layout(pixbuf, layout, pw->dialog->dialog, 0, 0, r, g, b, 255);
+       g_object_unref(G_OBJECT(layout));
 
-       if (lc_pointer)
-               {
-               setlocale(LC_NUMERIC, lc_pointer);
-               g_free(lc_pointer);
-               }
+       ret = print_job_ps_page_image(pw, pixbuf, x, y, 
+                                      /* do not allow rescaling of the pixbuf due to rounding errors */
+                                     ((gdouble)lw + 0.01) / scale_to_max_dpi,
+                                     ((gdouble)lh + 0.01) / scale_to_max_dpi, 
+                                     0, 0);
 
-       if (!ret) print_job_throw_error(pw, _("SIGPIPE error writing to printer."));
+       g_object_unref(G_OBJECT(pixbuf));
 
        return ret;
 }