about-dialog.c 41 KB
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/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
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#include "config.h"

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#include <string.h>
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#include <time.h>
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#include <gtk/gtk.h>
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#include <gdk/gdkkeysyms.h>
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#include "libgimpmath/gimpmath.h"
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#include "libgimpbase/gimpbase.h"
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#include "libgimpwidgets/gimpwidgets.h"
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#include "dialogs-types.h"
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#include "core/gimptoolinfo.h"
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#include "widgets/gimphelp-ids.h"
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#include "widgets/gimpdnd.h"

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#include "about-dialog.h"
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#include "authors.h"
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#include "gimp-intl.h"
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static gchar *founders[] =
{
  N_("Version %s brought to you by"),
  "Spencer Kimball & Peter Mattis"
};

static gchar *translators[] =
{
  N_("Translation by"),
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  /* Translators: insert your names here, separated by newline */
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  /* we'd prefer just the names, please no email addresses.    */
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  N_("translator-credits"),
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};

static gchar *contri_intro[] =
{
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  N_("Contributions by")
};
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static gchar **translator_names = NULL;

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typedef struct
{
  GtkWidget    *about_dialog;
  GtkWidget    *logo_area;
  GdkPixmap    *logo_pixmap;
  GdkRectangle  pixmaparea;
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  GdkBitmap    *shape_bitmap;
  GdkGC        *trans_gc;
  GdkGC        *opaque_gc;

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  GdkRectangle  textarea;
  gdouble       text_size;
  gdouble       min_text_size;
  PangoLayout  *layout;

  gint          timer;

  gint          index;
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  gint          animstep;
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  gboolean      visible;
  gint          textrange[2];
  gint          state;

} GimpAboutInfo;

PangoColor gradient[] =
{
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  { 139 * 257, 137 * 257, 124 * 257 },
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  { 65535, 65535, 65535 },
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  { 5000, 5000, 5000 },
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};

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PangoColor foreground = { 5000, 5000, 5000 };
PangoColor background = { 139 * 257, 137 * 257, 124 * 257 };
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/* backup values */

PangoColor grad1ent[] =
{
  { 0xff * 257, 0xba * 257, 0x00 * 257 },
  { 37522, 51914, 57568 },
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};

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PangoColor foregr0und = { 37522, 51914, 57568 };
PangoColor backgr0und = { 0, 0, 0 };

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static GimpAboutInfo about_info = { 0, };
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static gboolean pp = FALSE;
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static gboolean  about_dialog_load_logo   (GtkWidget         *window);
static void      about_dialog_destroy     (GtkObject         *object,
                                           gpointer           data);
static void      about_dialog_unmap       (GtkWidget         *widget,
                                           gpointer           data);
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static void      about_dialog_center      (GtkWindow         *window);
static gboolean  about_dialog_logo_expose (GtkWidget         *widget,
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                                           GdkEventExpose    *event,
                                           gpointer           data);
static gint      about_dialog_button      (GtkWidget         *widget,
                                           GdkEventButton    *event,
                                           gpointer           data);
static gint      about_dialog_key         (GtkWidget         *widget,
                                           GdkEventKey       *event,
                                           gpointer           data);
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static void      reshuffle_array          (void);
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static gboolean  about_dialog_timer       (gpointer           data);
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static PangoFontDescription  *font_desc     = NULL;
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static const gchar          **scroll_text   = authors;
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static gint                   nscroll_texts = G_N_ELEMENTS (authors);
static gint                   shuffle_array[G_N_ELEMENTS (authors)];
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GtkWidget *
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about_dialog_create (void)
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{
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  if (! about_info.about_dialog)
    {
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      GtkWidget   *widget;
      GdkGCValues  shape_gcv;
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      about_info.visible = FALSE;
      about_info.state = 0;
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      about_info.animstep = -1;
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      widget = g_object_new (GTK_TYPE_WINDOW,
                             "type",            GTK_WINDOW_POPUP,
                             "title",           _("About The GIMP"),
                             "window_position", GTK_WIN_POS_CENTER,
                             "resizable",       FALSE,
                             NULL);
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      about_info.about_dialog = widget;
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      gtk_window_set_role (GTK_WINDOW (widget), "about-dialog");
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      g_signal_connect (widget, "destroy",
                        G_CALLBACK (about_dialog_destroy),
                        NULL);
      g_signal_connect (widget, "unmap",
                        G_CALLBACK (about_dialog_unmap),
                        NULL);
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      g_signal_connect (widget, "button-press-event",
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                        G_CALLBACK (about_dialog_button),
                        NULL);
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      g_signal_connect (widget, "key-press-event",
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                        G_CALLBACK (about_dialog_key),
                        NULL);
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      gtk_widget_set_events (widget, GDK_BUTTON_PRESS_MASK);

      if (! about_dialog_load_logo (widget))
        {
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          gtk_widget_destroy (widget);
          about_info.about_dialog = NULL;
          return NULL;
        }
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      about_dialog_center (GTK_WINDOW (widget));
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      /* place the scrolltext at the bottom of the image */
      about_info.textarea.width = about_info.pixmaparea.width;
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      about_info.textarea.height = 32; /* gets changed in _expose () as well */
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      about_info.textarea.x = 0;
      about_info.textarea.y = (about_info.pixmaparea.height -
                               about_info.textarea.height);

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      widget = gtk_drawing_area_new ();
      about_info.logo_area = widget;
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      gtk_widget_set_size_request (widget,
                                   about_info.pixmaparea.width,
                                   about_info.pixmaparea.height);
      gtk_widget_set_events (widget, GDK_EXPOSURE_MASK);
      gtk_container_add (GTK_CONTAINER (about_info.about_dialog),
                         widget);
      gtk_widget_show (widget);
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      g_signal_connect (widget, "expose-event",
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                        G_CALLBACK (about_dialog_logo_expose),
                        NULL);
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      gtk_widget_realize (widget);
      gdk_window_set_background (widget->window,
                                 &(widget->style)->black);

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      /* setup shape bitmap */

      about_info.shape_bitmap = gdk_pixmap_new (widget->window,
                                                about_info.pixmaparea.width,
                                                about_info.pixmaparea.height,
                                                1);
      about_info.trans_gc = gdk_gc_new (about_info.shape_bitmap);

      about_info.opaque_gc = gdk_gc_new (about_info.shape_bitmap);
      gdk_gc_get_values (about_info.opaque_gc, &shape_gcv);
      gdk_gc_set_foreground (about_info.opaque_gc, &shape_gcv.background);

      gdk_draw_rectangle (about_info.shape_bitmap,
                          about_info.trans_gc,
                          TRUE,
                          0, 0,
                          about_info.pixmaparea.width,
                          about_info.pixmaparea.height);

      gdk_draw_line (about_info.shape_bitmap,
                     about_info.opaque_gc,
                     0, 0,
                     about_info.pixmaparea.width, 0);

      gtk_widget_shape_combine_mask (about_info.about_dialog,
                                     about_info.shape_bitmap,
                                     0, 0);
      about_info.layout = gtk_widget_create_pango_layout (about_info.logo_area,
                                                          NULL);
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      g_object_weak_ref (G_OBJECT (about_info.logo_area),
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                         (GWeakNotify) g_object_unref, about_info.layout);

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      font_desc = pango_font_description_from_string ("Sans, 11");
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      pango_layout_set_font_description (about_info.layout, font_desc);
      pango_layout_set_justify (about_info.layout, PANGO_ALIGN_CENTER);

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    }

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  if (! GTK_WIDGET_VISIBLE (about_info.about_dialog))
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    {
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      about_info.state = 0;
      about_info.index = 0;
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      reshuffle_array ();
      pango_layout_set_text (about_info.layout, "", -1);
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    }
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  gtk_window_present (GTK_WINDOW (about_info.about_dialog));
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  return about_info.about_dialog;
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}

static void
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about_dialog_destroy (GtkObject *object,
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                      gpointer   data)
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{
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  about_info.about_dialog = NULL;
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  about_dialog_unmap (NULL, NULL);
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}

static void
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about_dialog_unmap (GtkWidget *widget,
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                    gpointer   data)
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{
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  if (about_info.timer)
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    {
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      g_source_remove (about_info.timer);
      about_info.timer = 0;
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    }
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  if (about_info.about_dialog)
    {
      gdk_draw_rectangle (about_info.shape_bitmap,
                          about_info.trans_gc,
                          TRUE,
                          0, 0,
                          about_info.pixmaparea.width,
                          about_info.pixmaparea.height);

      gdk_draw_line (about_info.shape_bitmap,
                     about_info.opaque_gc,
                     0, 0,
                     about_info.pixmaparea.width, 0);

      gtk_widget_shape_combine_mask (about_info.about_dialog,
                                     about_info.shape_bitmap,
                                     0, 0);
    }
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}

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static void
about_dialog_center (GtkWindow *window)
{
  GdkDisplay   *display = gtk_widget_get_display (GTK_WIDGET (window));
  GdkScreen    *screen;
  GdkRectangle  rect;
  gint          monitor;
  gint          x, y;

  gdk_display_get_pointer (display, &screen, &x, &y, NULL);

  monitor = gdk_screen_get_monitor_at_point (screen, x, y);
  gdk_screen_get_monitor_geometry (screen, monitor, &rect);

  gtk_window_set_screen (window, screen);
  gtk_window_move (window,
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                   rect.x + (rect.width  - about_info.pixmaparea.width)  / 2,
                   rect.y + (rect.height - about_info.pixmaparea.height) / 2);
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}

static gboolean
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about_dialog_logo_expose (GtkWidget      *widget,
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                          GdkEventExpose *event,
                          gpointer        data)
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{
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  gint width, height;

  if (!about_info.timer)
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    {
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      GdkModifierType mask;

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      /* No timeout, we were unmapped earlier */
      about_info.state = 0;
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      about_info.index = 1;
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      about_info.animstep = -1;
      about_info.visible = FALSE;
      reshuffle_array ();
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      gdk_draw_rectangle (about_info.shape_bitmap,
                          about_info.trans_gc,
                          TRUE,
                          0, 0,
                          about_info.pixmaparea.width,
                          about_info.pixmaparea.height);

      gdk_draw_line (about_info.shape_bitmap,
                     about_info.opaque_gc,
                     0, 0,
                     about_info.pixmaparea.width, 0);

      gtk_widget_shape_combine_mask (about_info.about_dialog,
                                     about_info.shape_bitmap,
                                     0, 0);
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      about_info.timer = g_timeout_add (30, about_dialog_timer, NULL);
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      gdk_window_get_pointer (NULL, NULL, NULL, &mask);

      /* weird magic to determine the way the logo should be shown */
      mask &= ~GDK_BUTTON3_MASK;
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      pp = (mask &= (GDK_SHIFT_MASK | GDK_CONTROL_MASK) &
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                    (GDK_CONTROL_MASK | GDK_MOD1_MASK) &
                    (GDK_MOD1_MASK | ~GDK_SHIFT_MASK),
      height = mask ? (about_info.pixmaparea.height > 0) &&
                      (about_info.pixmaparea.width > 0): 0);

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      about_info.textarea.height = pp ? 50 : 32;
      about_info.textarea.y = (about_info.pixmaparea.height -
                               about_info.textarea.height);
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    }
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  /* only operate on the region covered by the pixmap */
  if (! gdk_rectangle_intersect (&(about_info.pixmaparea),
                                 &(event->area),
                                 &(event->area)))
    return FALSE;

  gdk_gc_set_clip_rectangle (widget->style->black_gc, &(event->area));

  gdk_draw_drawable (widget->window,
                     widget->style->white_gc,
                     about_info.logo_pixmap,
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                     event->area.x, event->area.y +
                     (pp ? about_info.pixmaparea.height : 0),
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                     event->area.x, event->area.y,
                     event->area.width, event->area.height);

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  if (pp && about_info.state == 0 &&
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      (about_info.index < about_info.pixmaparea.height / 12 ||
       about_info.index < g_random_int () %
                          (about_info.pixmaparea.height / 8 + 13)))
    {
      gdk_draw_rectangle (widget->window,
                          widget->style->black_gc,
                          TRUE,
                          0, 0, about_info.pixmaparea.width, 158);
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    }

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  if (about_info.visible == TRUE)
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    {
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      gint layout_x, layout_y;

      pango_layout_get_pixel_size (about_info.layout, &width, &height);

      layout_x = about_info.textarea.x +
                        (about_info.textarea.width - width) / 2;
      layout_y = about_info.textarea.y +
                        (about_info.textarea.height - height) / 2;
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      if (about_info.textrange[1] > 0)
        {
          GdkRegion *covered_region = NULL;
          GdkRegion *rect_region;

          covered_region = gdk_pango_layout_get_clip_region
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                                    (about_info.layout,
                                     layout_x, layout_y,
                                     about_info.textrange, 1);
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          rect_region = gdk_region_rectangle (&(event->area));

          gdk_region_intersect (covered_region, rect_region);
          gdk_region_destroy (rect_region);

          gdk_gc_set_clip_region (about_info.logo_area->style->text_gc[GTK_STATE_NORMAL],
                                  covered_region);
          gdk_region_destroy (covered_region);
        }

      gdk_draw_layout (widget->window,
                       widget->style->text_gc[GTK_STATE_NORMAL],
                       layout_x, layout_y,
                       about_info.layout);

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    }

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  gdk_gc_set_clip_rectangle (widget->style->black_gc, NULL);

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  return FALSE;
}

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static gint
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about_dialog_button (GtkWidget      *widget,
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                     GdkEventButton *event,
                     gpointer        data)
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{
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  gtk_widget_hide (about_info.about_dialog);
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  return FALSE;
}

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static gint
about_dialog_key (GtkWidget      *widget,
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                  GdkEventKey    *event,
                  gpointer        data)
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{
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  /* placeholder */
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  switch (event->keyval)
    {
    case GDK_a:
    case GDK_A:
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    case GDK_b:
    case GDK_B:
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    default:
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        break;
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    }
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  return FALSE;
}

static gchar *
insert_spacers (const gchar *string)
{
  gchar *normalized, *ptr;
  gunichar unichr;
  GString *str;

  str = g_string_new (NULL);
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  normalized = g_utf8_normalize (string, -1, G_NORMALIZE_DEFAULT_COMPOSE);
  ptr = normalized;

  while ((unichr = g_utf8_get_char (ptr)))
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    {
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      g_string_append_unichar (str, unichr);
      g_string_append_unichar (str, 0x200b);  /* ZERO WIDTH SPACE */
      ptr = g_utf8_next_char (ptr);
    }
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  g_free (normalized);
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  return g_string_free (str, FALSE);
}

static void
mix_gradient (PangoColor *gradient, guint ncolors,
              PangoColor *target, gdouble pos)
{
  gint index;

  g_return_if_fail (gradient != NULL);
  g_return_if_fail (ncolors > 1);
  g_return_if_fail (target != NULL);
  g_return_if_fail (pos >= 0.0  &&  pos <= 1.0);

  if (pos == 1.0)
    {
      target->red   = gradient[ncolors-1].red;
      target->green = gradient[ncolors-1].green;
      target->blue  = gradient[ncolors-1].blue;
      return;
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    }
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  index = (int) floor (pos * (ncolors-1));
  pos = pos * (ncolors - 1) - index;

  target->red   = gradient[index].red   * (1.0 - pos) + gradient[index+1].red   * pos;
  target->green = gradient[index].green * (1.0 - pos) + gradient[index+1].green * pos;
  target->blue  = gradient[index].blue  * (1.0 - pos) + gradient[index+1].blue  * pos;
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}

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static void
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mix_colors (PangoColor *start, PangoColor *end,
            PangoColor *target,
            gdouble pos)
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{
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  g_return_if_fail (start != NULL);
  g_return_if_fail (end != NULL);
  g_return_if_fail (target != NULL);
  g_return_if_fail (pos >= 0.0  &&  pos <= 1.0);

  target->red   = start->red   * (1.0 - pos) + end->red   * pos;
  target->green = start->green * (1.0 - pos) + end->green * pos;
  target->blue  = start->blue  * (1.0 - pos) + end->blue  * pos;
}
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static void
reshuffle_array (void)
{
  GRand *gr = g_rand_new ();
  gint i;

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  for (i = 0; i < nscroll_texts; i++)
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    {
      shuffle_array[i] = i;
    }

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  for (i = 0; i < nscroll_texts; i++)
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    {
      gint j;

      j = g_rand_int_range (gr, 0, nscroll_texts);
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      if (i != j)
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        {
          gint t;

          t = shuffle_array[j];
          shuffle_array[j] = shuffle_array[i];
          shuffle_array[i] = t;
        }
    }

  g_rand_free (gr);
}

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static void
decorate_text (PangoLayout *layout, gint anim_type, gdouble time)
{
  gint letter_count = 0;
  gint text_length = 0;
  gint text_bytelen = 0;
  gint cluster_start, cluster_end;
  const gchar *text;
  const gchar *ptr;
  gunichar unichr;
  PangoAttrList *attrlist = NULL;
  PangoAttribute *attr;
  PangoRectangle irect = {0, 0, 0, 0};
  PangoRectangle lrect = {0, 0, 0, 0};
  PangoColor mix;

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  mix_colors ((pp ? &backgr0und : &background),
              (pp ? &foregr0und : &foreground),
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              &mix, time);

  text = pango_layout_get_text (layout);
  text_length = g_utf8_strlen (text, -1);
  text_bytelen = strlen (text);

  attrlist = pango_attr_list_new ();

  about_info.textrange[0] = 0;
  about_info.textrange[1] = text_bytelen;

  switch (anim_type)
  {
    case 0: /* Fade in */
      attr = pango_attr_foreground_new (mix.red, mix.green, mix.blue);
      attr->start_index = 0;
      attr->end_index = text_bytelen;
      pango_attr_list_insert (attrlist, attr);
      break;

    case 1: /* Fade in, spread */
      attr = pango_attr_foreground_new (mix.red, mix.green, mix.blue);
      attr->start_index = 0;
      attr->end_index = text_bytelen;
      pango_attr_list_change (attrlist, attr);

      ptr = text;

      cluster_start = 0;
      while ((unichr = g_utf8_get_char (ptr)))
        {
          ptr = g_utf8_next_char (ptr);
          cluster_end = (ptr - text);

          if (unichr == 0x200b)
            {
              lrect.width = (1.0 - time) * 15.0 * PANGO_SCALE + 0.5;
              attr = pango_attr_shape_new (&irect, &lrect);
              attr->start_index = cluster_start;
              attr->end_index = cluster_end;
              pango_attr_list_change (attrlist, attr);
            }
          cluster_start = cluster_end;
        }
      break;
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    case 2: /* Fade in, sinewave */
      attr = pango_attr_foreground_new (mix.red, mix.green, mix.blue);
      attr->start_index = 0;
      attr->end_index = text_bytelen;
      pango_attr_list_change (attrlist, attr);

      ptr = text;

      cluster_start = 0;
      while ((unichr = g_utf8_get_char (ptr)))
        {
          if (unichr == 0x200b)
            {
              cluster_end = ptr - text;
              attr = pango_attr_rise_new ((1.0 -time) * 18000 *
                                          sin (4.0 * time +
                                               (float) letter_count * 0.7));
              attr->start_index = cluster_start;
              attr->end_index = cluster_end;
              pango_attr_list_change (attrlist, attr);

              letter_count++;
              cluster_start = cluster_end;
            }

          ptr = g_utf8_next_char (ptr);
        }
      break;
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    case 3: /* letterwise Fade in */
      ptr = text;
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      letter_count = 0;
      cluster_start = 0;
      while ((unichr = g_utf8_get_char (ptr)))
        {
          gint border;
          gdouble pos;
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          border = (text_length + 15) * time - 15;
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          if (letter_count < border)
            pos = 0;
          else if (letter_count > border + 15)
            pos = 1;
          else
            pos = ((gdouble) (letter_count - border)) / 15;
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          mix_colors ((pp ? &foregr0und : &foreground),
                      (pp ? &backgr0und : &background),
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                      &mix, pos);
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          ptr = g_utf8_next_char (ptr);
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          cluster_end = ptr - text;
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          attr = pango_attr_foreground_new (mix.red, mix.green, mix.blue);
          attr->start_index = cluster_start;
          attr->end_index = cluster_end;
          pango_attr_list_change (attrlist, attr);
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          if (pos < 1.0)
            about_info.textrange[1] = cluster_end;
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          letter_count++;
          cluster_start = cluster_end;
        }
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      break;
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    case 4: /* letterwise Fade in, triangular */
      ptr = text;
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      letter_count = 0;
      cluster_start = 0;
      while ((unichr = g_utf8_get_char (ptr)))
        {
          gint border;
          gdouble pos;

          border = (text_length + 15) * time - 15;

          if (letter_count < border)
            pos = 1.0;
          else if (letter_count > border + 15)
            pos = 0.0;
          else
            pos = 1.0 - ((gdouble) (letter_count - border)) / 15;

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          mix_gradient (pp ? grad1ent : gradient,
                        pp ? G_N_ELEMENTS (grad1ent) : G_N_ELEMENTS (gradient),
                        &mix, pos);
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          ptr = g_utf8_next_char (ptr);

          cluster_end = ptr - text;

          attr = pango_attr_foreground_new (mix.red, mix.green, mix.blue);
          attr->start_index = cluster_start;
          attr->end_index = cluster_end;
          pango_attr_list_change (attrlist, attr);

          if (pos > 0.0)
            about_info.textrange[1] = cluster_end;
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          letter_count++;
          cluster_start = cluster_end;
        }
      break;

    default:
      g_printerr ("Unknown animation type %d\n", anim_type);
  }

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  pango_layout_set_attributes (layout, attrlist);
  pango_attr_list_unref (attrlist);
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}

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static gboolean
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about_dialog_timer (gpointer data)
{
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  gboolean return_val;
  gint width, height;
  gdouble size;
  gchar *text;
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  return_val = TRUE;

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  if (about_info.animstep == 0)
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    {
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      size = 11.0;
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      text = NULL;
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      about_info.visible = TRUE;

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      if (about_info.state == 0)
        {
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          if (about_info.index > (about_info.pixmaparea.height /
                                  (pp ? 8 : 16)) + 16)
            {
              about_info.index = 0;
              about_info.state ++;
            }
          else
            {
              height = about_info.index * 16;

              if (height < about_info.pixmaparea.height)
                gdk_draw_line (about_info.shape_bitmap,
                               about_info.opaque_gc,
                               0, height,
                               about_info.pixmaparea.width, height);

              height -= 15;
              while (height > 0)
                {
                  if (height < about_info.pixmaparea.height)
                    gdk_draw_line (about_info.shape_bitmap,
                                   about_info.opaque_gc,
                                   0, height,
                                   about_info.pixmaparea.width, height);
                  height -= 15;
                }

              gtk_widget_shape_combine_mask (about_info.about_dialog,
                                             about_info.shape_bitmap,
                                             0, 0);
              about_info.index++;
              about_info.visible = FALSE;
              gtk_widget_queue_draw_area (about_info.logo_area,
                                          0, 0,
                                          about_info.pixmaparea.width,
                                          about_info.pixmaparea.height);
              return TRUE;
            }
        }

      if (about_info.state == 1)
        {
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          if (about_info.index >= G_N_ELEMENTS (founders))
            {
              about_info.index = 0;
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              /* skip the translators section when the translator
               * did not provide a translation with his name
               */
              if (gettext (translators[1]) == translators[1])
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                about_info.state = 4;
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              else
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                about_info.state = 2;
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            }
          else
            {
              if (about_info.index == 0)
                {
                  gchar *tmp;
                  tmp = g_strdup_printf (gettext (founders[0]), GIMP_VERSION);
                  text = insert_spacers (tmp);
                  g_free (tmp);
                }
              else
                {
                  text = insert_spacers (gettext (founders[about_info.index]));
                }
              about_info.index++;
            }
        }
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      if (about_info.state == 2)
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        {
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          if (about_info.index >= G_N_ELEMENTS (translators) - 1)
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            {
              about_info.index = 0;
              about_info.state++;
            }
          else
            {
              text = insert_spacers (gettext (translators[about_info.index]));
              about_info.index++;
            }
        }
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      if (about_info.state == 3)
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        {
          if (!translator_names)
            translator_names = g_strsplit (gettext (translators[1]), "\n", 0);

          if (translator_names[about_info.index] == NULL)
            {
              about_info.index = 0;
              about_info.state++;
            }
          else
            {
              text = insert_spacers (translator_names[about_info.index]);
              about_info.index++;
            }
        }
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      if (about_info.state == 4)
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        {
          if (about_info.index >= G_N_ELEMENTS (contri_intro))
            {
              about_info.index = 0;
              about_info.state++;
            }
          else
            {
              text = insert_spacers (gettext (contri_intro[about_info.index]));
              about_info.index++;
            }

        }

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      if (about_info.state == 5)
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        {
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          about_info.index += 1;
          if (about_info.index == nscroll_texts)
            about_info.index = 0;
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          text = insert_spacers (scroll_text[shuffle_array[about_info.index]]);
        }
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      if (text == NULL)
        {
          g_printerr ("TEXT == NULL\n");
          return TRUE;
        }
      pango_layout_set_text (about_info.layout, text, -1);
      pango_layout_set_attributes (about_info.layout, NULL);
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      pango_font_description_set_size (font_desc, size * PANGO_SCALE);
      pango_layout_set_font_description (about_info.layout, font_desc);
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      pango_layout_get_pixel_size (about_info.layout, &width, &height);
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      while (width >= about_info.textarea.width && size >= 6.0)
        {
          size -= 0.5;
          pango_font_description_set_size (font_desc, size * PANGO_SCALE);
          pango_layout_set_font_description (about_info.layout, font_desc);
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          pango_layout_get_pixel_size (about_info.layout, &width, &height);
        }
    }
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  about_info.animstep++;
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  if (about_info.animstep < 16)
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    {
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      decorate_text (about_info.layout, 4,
                     ((float) about_info.animstep) / 15.0);
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    }
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  else if (about_info.animstep == 16)
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    {
      about_info.timer = g_timeout_add (800, about_dialog_timer, NULL);
      return_val = FALSE;
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    }
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  else if (about_info.animstep == 17)
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    {
      about_info.timer = g_timeout_add (30, about_dialog_timer, NULL);
      return_val = FALSE;
    }
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  else if (about_info.animstep < 33)
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    {
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      decorate_text (about_info.layout, 1,
                     1.0 - ((float) (about_info.animstep-17)) / 15.0);
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    }
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  else if (about_info.animstep == 33)
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    {
      about_info.timer = g_timeout_add (300, about_dialog_timer, NULL);
      return_val = FALSE;
      about_info.visible = FALSE;
    }
  else
    {
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      about_info.animstep = 0;
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      about_info.timer = g_timeout_add (30, about_dialog_timer, NULL);
      return_val = FALSE;
      about_info.visible = FALSE;
    }

  gtk_widget_queue_draw_area (about_info.logo_area,
                              about_info.textarea.x,
                              about_info.textarea.y,
                              about_info.textarea.width,
                              about_info.textarea.height);
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  return return_val;
}
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/* some handy shortcuts */

#define random() gdk_pixbuf_loader_new_with_type ("\160\x6e\147", NULL)
#define pink(a) gdk_pixbuf_loader_close ((a), NULL)
#define line gdk_pixbuf_loader_write
#define white gdk_pixbuf_loader_get_pixbuf
#define level(a) gdk_pixbuf_get_width ((a))
#define variance(a) gdk_pixbuf_get_height ((a))
#define GPL GdkPixbufLoader

static gboolean
about_dialog_load_logo (GtkWidget *window)
{
  gchar       *filename;
  GdkPixbuf   *pixbuf;
  GdkGC       *gc;
  PangoLayout *layout;
  PangoFontDescription *desc;
  GPL         *noise;

  if (about_info.logo_pixmap)
    return TRUE;

  filename = g_build_filename (gimp_data_directory (), "images",
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                               "gimp-logo.png", NULL);
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  pixbuf = gdk_pixbuf_new_from_file (filename, NULL);
  g_free (filename);

  if (! pixbuf)
    return FALSE;

  about_info.pixmaparea.x = 0;
  about_info.pixmaparea.y = 0;
  about_info.pixmaparea.width = gdk_pixbuf_get_width (pixbuf);
  about_info.pixmaparea.height = gdk_pixbuf_get_height (pixbuf);

  gtk_widget_realize (window);

  about_info.logo_pixmap = gdk_pixmap_new (window->window,
                                about_info.pixmaparea.width,
                                about_info.pixmaparea.height * 2,
                                gtk_widget_get_visual (window)->depth);

  layout = gtk_widget_create_pango_layout (window, NULL);
  desc = pango_font_description_from_string ("Sans, Italic 9");
  pango_layout_set_font_description (layout, desc);
  pango_layout_set_justify (layout, PANGO_ALIGN_CENTER);
  pango_layout_set_text (layout, GIMP_VERSION, -1);
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  gc = gdk_gc_new (about_info.logo_pixmap);

  /* draw a defined content to the Pixmap */
  gdk_draw_rectangle (GDK_DRAWABLE (about_info.logo_pixmap),
                      gc, TRUE,
                      0, 0,
                      about_info.pixmaparea.width,
                      about_info.pixmaparea.height * 2);
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  gdk_draw_pixbuf (GDK_DRAWABLE (about_info.logo_pixmap),
                   gc, pixbuf,
                   0, 0, 0, 0,
                   about_info.pixmaparea.width,
                   about_info.pixmaparea.height,
                   GDK_RGB_DITHER_NORMAL, 0, 0);

  gdk_draw_layout (GDK_DRAWABLE (about_info.logo_pixmap),
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                   gc, 8, 39, layout);
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  g_object_unref (pixbuf);
  g_object_unref (layout);

  if ((noise = random ()) && line (noise,
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        "\211\120\116\107\r\n\032\n\0\0\0\r\111\110D\122\0\0\001+\0\0\001"
        "\r\004\003\0\0\0\245\177^\254\0\0\0000\120\114TE\0\0\0\023\026\026"
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        "\226Qbs52c\275\215\000\254\260N)\214X\222\036+C\261V\234\246j#V"
        "7}:#\226\241\265\277\177=\213 ,\222O\260\222\024Kc\215Q\254\262"
        ";\254,o-\\\212&F7\260%\2029q\036+\000\226\254V\230\021N\r"
        "X1\275\007p0bIVr\207\025QX/\204\014\000b\254\270\036\213\267"
        "\214\031\213\\\276/\000VN\275\221\247\275\250pa\207\245Y\201"
        "|\025\013\205\274d*\252|*\253:9\256\2600L\246\207\"k4G\254\031"
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        "j-\026\033\204\245\037&\201\254_+\222a,\205s\206URET\004"
        "\023\256\261|@%\251\024=\037\214\240\035z7Y\0371c\232k5"
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        "A\266\035VOoro\235\017\\\202\253\252\233\233\014\275"
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        "t\254_\2207\253\201\021\'<-3+W\002U|\214\025\276"
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        "Xy\032\277\002aiee\244\254\036\032\030\210\270\022\222\223"
        "/\rX,YBR\224\224\275\227\232\243\216e!\026N.\221}\205e#V\017V\224"
        "\"\251\254\034\2569\222\233e5b\2051iM\263[]6\224\206G\""
        "\205\014J\231\206HH\n\036\",<Cd\025.\033\261\272:\2725Cn"
        "\'\225b,\253\021\253o.9\203\212q\216-r6\243aE\205b\200\275e\272"
        "\005\227@,Tz;W\214v=\222\021K.}\234\247\255\0251Y}2j*"
        ";\250\257<p\024\227\"\225\253\227\006K1\rKQ>\222\242\032V\005"
        "\262>\222v#\245\224\020!f6z\277Z\241\025\252Xx\215x\221\026"
        "\"1\007\262\237f5`\205W\220W\212xy\231MO7\000\244yfU\267<\250"
        "fh\262\206]y\205y\214Dv>\264\231\252v\245\022dA\212\241~w"
        "\254\232\025ts\242\265J$C\256\255\253,<@\244\207\010\2667"
        "TWwh)\'{\237\244\241T+Q|\253\250\257R\215\205\224#t\\\207"
        "c\"\220@\002\t$\220@\002\t$\220@\002\t$\220@\002\t$\220@\002\t"
        "$\220@\177t\007uUy$\0\0\0\0IE\116\104\256B`\202", 4093, NULL)
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      && pink (noise) && white (noise))
    {
      gdk_draw_pixbuf (GDK_DRAWABLE (about_info.logo_pixmap),
                       gc, white (noise), 0, 0,
Michael Natterer's avatar
Michael Natterer committed
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                       (about_info.pixmaparea.width -
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                        level (white (noise))) / 2,
                       about_info.pixmaparea.height +
                       (about_info.pixmaparea.height -
                        variance (white (noise))) / 2,
                       level (white (noise)),
                       variance (white (noise)),
                       GDK_RGB_DITHER_NORMAL, 0, 0);
    }

  g_object_unref (noise);
  g_object_unref (gc);

  return TRUE;
}