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glyphs-gtk.c

/* X-specific Lisp objects.
   Copyright (C) 1993, 1994 Free Software Foundation, Inc.
   Copyright (C) 1995 Board of Trustees, University of Illinois.
   Copyright (C) 1995 Tinker Systems
   Copyright (C) 1995, 1996 Ben Wing
   Copyright (C) 1995 Sun Microsystems

This file is part of XEmacs.

XEmacs 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, or (at your option) any
later version.

XEmacs 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 XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: Not in FSF. */

/* Original author: Jamie Zawinski for 19.8
   font-truename stuff added by Jamie Zawinski for 19.10
   subwindow support added by Chuck Thompson
   additional XPM support added by Chuck Thompson
   initial X-Face support added by Stig
   rewritten/restructured by Ben Wing for 19.12/19.13
   GIF/JPEG support added by Ben Wing for 19.14
   PNG support added by Bill Perry for 19.14
   Improved GIF/JPEG support added by Bill Perry for 19.14
   Cleanup/simplification of error handling by Ben Wing for 19.14
   Pointer/icon overhaul, more restructuring by Ben Wing for 19.14
   GIF support changed to external GIFlib 3.1 by Jareth Hein for 21.0
   Many changes for color work and optimizations by Jareth Hein for 21.0
   Switch of GIF/JPEG/PNG to new EImage intermediate code by Jareth Hein for 21.0
   TIFF code by Jareth Hein for 21.0
   GIF/JPEG/PNG/TIFF code moved to new glyph-eimage.c for 21.0
   Gtk version by William Perry for 21.1

   TODO:
   Support the GrayScale, StaticColor and StaticGray visual classes.
   Convert images.el to C and stick it in here?
 */

#include <config.h>
#include "lisp.h"
#include "lstream.h"
#include "console-gtk.h"
#include "glyphs.h"
#include "glyphs-gtk.h"
#include "objects-gtk.h"
#include "gui-gtk.h"
#include "ui-gtk.h"

#include "buffer.h"
#include "window.h"
#include "frame.h"
#include "insdel.h"
#include "opaque.h"
#include "faces.h"
#include "elhash.h"
#include "events.h"

#include "imgproc.h"

#include "sysfile.h"

#include <setjmp.h>

#if defined (HAVE_XPM)
#include <X11/xpm.h>
#endif

#ifdef FILE_CODING
#include "file-coding.h"
#endif

extern void enqueue_gtk_dispatch_event (Lisp_Object event);

/* Widget callback hash table callback slot. */
#define WIDGET_GLYPH_SLOT 0

#if INTBITS == 32
# define FOUR_BYTE_TYPE unsigned int
#elif LONGBITS == 32
# define FOUR_BYTE_TYPE unsigned long
#elif SHORTBITS == 32
# define FOUR_BYTE_TYPE unsigned short
#else
#error What kind of strange-ass system are we running on?
#endif

DECLARE_IMAGE_INSTANTIATOR_FORMAT (nothing);
DECLARE_IMAGE_INSTANTIATOR_FORMAT (string);
DECLARE_IMAGE_INSTANTIATOR_FORMAT (formatted_string);
DECLARE_IMAGE_INSTANTIATOR_FORMAT (inherit);
#ifdef HAVE_JPEG
DECLARE_IMAGE_INSTANTIATOR_FORMAT (jpeg);
#endif
#ifdef HAVE_TIFF
DECLARE_IMAGE_INSTANTIATOR_FORMAT (tiff);
#endif
#ifdef HAVE_PNG
DECLARE_IMAGE_INSTANTIATOR_FORMAT (png);
#endif
#ifdef HAVE_GIF
DECLARE_IMAGE_INSTANTIATOR_FORMAT (gif);
#endif

#ifdef HAVE_XFACE
DEFINE_DEVICE_IIFORMAT (gtk, xface);
Lisp_Object Qxface;
#endif

#ifdef HAVE_XPM
DEFINE_DEVICE_IIFORMAT (gtk, xpm);
#endif

DEFINE_DEVICE_IIFORMAT (gtk, xbm);
DEFINE_DEVICE_IIFORMAT (gtk, subwindow);

DEFINE_IMAGE_INSTANTIATOR_FORMAT (cursor_font);
Lisp_Object Qcursor_font;

DEFINE_IMAGE_INSTANTIATOR_FORMAT (font);

DEFINE_IMAGE_INSTANTIATOR_FORMAT (autodetect);

#ifdef HAVE_WIDGETS
DECLARE_IMAGE_INSTANTIATOR_FORMAT (layout);
DEFINE_DEVICE_IIFORMAT (gtk, widget);
DEFINE_DEVICE_IIFORMAT (gtk, native_layout);
DEFINE_DEVICE_IIFORMAT (gtk, button);
DEFINE_DEVICE_IIFORMAT (gtk, progress_gauge);
DEFINE_DEVICE_IIFORMAT (gtk, edit_field);
DEFINE_DEVICE_IIFORMAT (gtk, combo_box);
DEFINE_DEVICE_IIFORMAT (gtk, tab_control);
DEFINE_DEVICE_IIFORMAT (gtk, label);
#endif

static void update_widget_face (GtkWidget *w, Lisp_Image_Instance *ii,
                        Lisp_Object domain);
static void cursor_font_instantiate (Lisp_Object image_instance,
                             Lisp_Object instantiator,
                             Lisp_Object pointer_fg,
                             Lisp_Object pointer_bg,
                             int dest_mask,
                             Lisp_Object domain);

static gint cursor_name_to_index (const char *name);

#ifndef BitmapSuccess
#define BitmapSuccess           0
#define BitmapOpenFailed        1
#define BitmapFileInvalid       2
#define BitmapNoMemory          3
#endif

#include "bitmaps.h"

DEFINE_IMAGE_INSTANTIATOR_FORMAT (gtk_resource);
Lisp_Object Q_resource_type, Q_resource_id;
Lisp_Object Qgtk_resource;
#ifdef HAVE_WIDGETS
Lisp_Object Qgtk_widget_instantiate_internal, Qgtk_widget_property_internal;
Lisp_Object Qgtk_widget_redisplay_internal, Qgtk_widget_set_style;
#endif

#define CONST const


/************************************************************************/
/*                      image instance methods                          */
/************************************************************************/

/************************************************************************/
/* convert from a series of RGB triples to an XImage formated for the   */
/* proper display                                           */
/************************************************************************/
static GdkImage *
convert_EImage_to_GDKImage (Lisp_Object device, int width, int height,
                      unsigned char *pic, unsigned long **pixtbl,
                      int *npixels)
{
  GdkColormap *cmap;
  GdkVisual *vis;
  GdkImage *outimg;
  int depth, byte_cnt, i, j;
  int rd,gr,bl,q;
  unsigned char *data, *ip, *dp = NULL;
  quant_table *qtable = NULL;
  union {
    FOUR_BYTE_TYPE val;
    char cp[4];
  } conv;

  cmap = DEVICE_GTK_COLORMAP (XDEVICE(device));
  vis = DEVICE_GTK_VISUAL (XDEVICE(device));
  depth = DEVICE_GTK_DEPTH(XDEVICE(device));

  if (vis->type == GDK_VISUAL_GRAYSCALE || vis->type == GDK_VISUAL_STATIC_COLOR ||
      vis->type == GDK_VISUAL_STATIC_GRAY)
    {
      /* #### Implement me!!! */
      return NULL;
    }

  if (vis->type == GDK_VISUAL_PSEUDO_COLOR)
    {
      /* Quantize the image and get a histogram while we're at it.
       Do this first to save memory */
      qtable = build_EImage_quantable(pic, width, height, 256);
      if (qtable == NULL) return NULL;
    }

  /* The first parameter (GdkWindow *) is allowed to be NULL if we
  ** specify the depth */
  outimg = gdk_image_new (GDK_IMAGE_FASTEST, vis, width, height);

  if (!outimg) return NULL;

  byte_cnt = outimg->bpp;

  data = (unsigned char *) outimg->mem;

  if (!data)
    {
      gdk_image_destroy (outimg);
      return NULL;
    }
  
  if (vis->type == GDK_VISUAL_PSEUDO_COLOR)
    {
      unsigned long pixarray[256];
      int pixcount, n;
      /* use our quantize table to allocate the colors */
      pixcount = 32;
      *pixtbl = xnew_array (unsigned long, pixcount);
      *npixels = 0;

      /* ### should implement a sort by popularity to assure proper allocation */
      n = *npixels;
      for (i = 0; i < qtable->num_active_colors; i++)
      {
        GdkColor color;
        int res;
      
        color.red = qtable->rm[i] ? qtable->rm[i] << 8 : 0;
        color.green = qtable->gm[i] ? qtable->gm[i] << 8 : 0;
        color.blue = qtable->bm[i] ? qtable->bm[i] << 8 : 0;
        res = allocate_nearest_color (cmap, vis, &color);
        if (res > 0 && res < 3)
          {
            DO_REALLOC(*pixtbl, pixcount, n+1, unsigned long);
            (*pixtbl)[n] = color.pixel;
            n++;
          }
        pixarray[i] = color.pixel;
      }
      *npixels = n;
      ip = pic;
      for (i = 0; i < height; i++)
      {
        dp = data + (i * outimg->bpl);
        for (j = 0; j < width; j++)
          {
            rd = *ip++;
            gr = *ip++;
            bl = *ip++;
            conv.val = pixarray[QUANT_GET_COLOR(qtable,rd,gr,bl)];
#if WORDS_BIGENDIAN
            if (outimg->byte_order == GDK_MSB_FIRST)
            for (q = 4-byte_cnt; q < 4; q++) *dp++ = conv.cp[q];
            else
            for (q = 3; q >= 4-byte_cnt; q--) *dp++ = conv.cp[q];
#else
            if (outimg->byte_order == GDK_MSB_FIRST)
            for (q = byte_cnt-1; q >= 0; q--) *dp++ = conv.cp[q];
            else
            for (q = 0; q < byte_cnt; q++) *dp++ = conv.cp[q];
#endif
          }
      }
      xfree(qtable);
    } else {
      unsigned long rshift,gshift,bshift,rbits,gbits,bbits,junk;
      junk = vis->red_mask;
      rshift = 0;
      while ((junk & 0x1) == 0)
      {
        junk = junk >> 1;
        rshift ++;
      }
      rbits = 0;
      while (junk != 0)
      {
        junk = junk >> 1;
        rbits++;
      }
      junk = vis->green_mask;
      gshift = 0;
      while ((junk & 0x1) == 0)
      {
        junk = junk >> 1;
        gshift ++;
      }
      gbits = 0;
      while (junk != 0)
      {
        junk = junk >> 1;
        gbits++;
      }
      junk = vis->blue_mask;
      bshift = 0;
      while ((junk & 0x1) == 0)
      {
        junk = junk >> 1;
        bshift ++;
      }
      bbits = 0;
      while (junk != 0)
      {
        junk = junk >> 1;
        bbits++;
      }
      ip = pic;
      for (i = 0; i < height; i++)
      {
        dp = data + (i * outimg->bpl);
        for (j = 0; j < width; j++)
          {
            if (rbits > 8)
            rd = *ip++ << (rbits - 8);
            else
            rd = *ip++ >> (8 - rbits);
            if (gbits > 8)
            gr = *ip++ << (gbits - 8);
            else
            gr = *ip++ >> (8 - gbits);
            if (bbits > 8)
            bl = *ip++ << (bbits - 8);
            else
            bl = *ip++ >> (8 - bbits);

            conv.val = (rd << rshift) | (gr << gshift) | (bl << bshift);
#if WORDS_BIGENDIAN
            if (outimg->byte_order == GDK_MSB_FIRST)
            for (q = 4-byte_cnt; q < 4; q++) *dp++ = conv.cp[q];
            else
            for (q = 3; q >= 4-byte_cnt; q--) *dp++ = conv.cp[q];
#else
            if (outimg->byte_order == GDK_MSB_FIRST)
            for (q = byte_cnt-1; q >= 0; q--) *dp++ = conv.cp[q];
            else
            for (q = 0; q < byte_cnt; q++) *dp++ = conv.cp[q];
#endif
          }
      }
    }  
  return outimg;
}

static void
gtk_print_image_instance (struct Lisp_Image_Instance *p,
                    Lisp_Object printcharfun,
                    int escapeflag)
{
  char buf[100];

  switch (IMAGE_INSTANCE_TYPE (p))
    {
    case IMAGE_MONO_PIXMAP:
    case IMAGE_COLOR_PIXMAP:
    case IMAGE_POINTER:
      sprintf (buf, " (0x%lx", (unsigned long) IMAGE_INSTANCE_GTK_PIXMAP (p));
      write_c_string (buf, printcharfun);
      if (IMAGE_INSTANCE_GTK_MASK (p))
      {
        sprintf (buf, "/0x%lx", (unsigned long) IMAGE_INSTANCE_GTK_MASK (p));
        write_c_string (buf, printcharfun);
      }
      write_c_string (")", printcharfun);
      break;
#if HAVE_SUBWINDOWS
    case IMAGE_SUBWINDOW:
      /* #### implement me */
#endif
    default:
      break;
    }
}

static void
gtk_finalize_image_instance (struct Lisp_Image_Instance *p)
{
  if (!p->data)
    return;

  if (DEVICE_LIVE_P (XDEVICE (p->device)))
    {
      if (0)
      ;
#ifdef HAVE_WIDGETS
      if (IMAGE_INSTANCE_TYPE (p) == IMAGE_WIDGET)
      {
        if (IMAGE_INSTANCE_SUBWINDOW_ID (p))
          {
            gtk_widget_destroy (IMAGE_INSTANCE_SUBWINDOW_ID (p));

            /* We can release the callbacks again. */
            /* #### FIXME! */
            /* ungcpro_popup_callbacks (...); */

            /* IMAGE_INSTANCE_GTK_WIDGET_ID (p) = 0; */
            IMAGE_INSTANCE_GTK_CLIPWIDGET (p) = 0;
          }
      }
#endif
      else if (IMAGE_INSTANCE_TYPE (p) == IMAGE_SUBWINDOW)
      {
        ABORT();
      }
      else
      {
        int i;
        if (IMAGE_INSTANCE_PIXMAP_TIMEOUT (p))
          disable_glyph_animated_timeout (IMAGE_INSTANCE_PIXMAP_TIMEOUT (p));

        if (IMAGE_INSTANCE_GTK_MASK (p) &&
            IMAGE_INSTANCE_GTK_MASK (p) != IMAGE_INSTANCE_GTK_PIXMAP (p))
          gdk_pixmap_unref (IMAGE_INSTANCE_GTK_MASK (p));
        IMAGE_INSTANCE_PIXMAP_MASK (p) = 0;

        if (IMAGE_INSTANCE_GTK_PIXMAP_SLICES (p))
          {
            for (i = 0; i < IMAGE_INSTANCE_PIXMAP_MAXSLICE (p); i++)
            if (IMAGE_INSTANCE_GTK_PIXMAP_SLICE (p,i))
              {
                gdk_pixmap_unref (IMAGE_INSTANCE_GTK_PIXMAP_SLICE (p,i));
                IMAGE_INSTANCE_GTK_PIXMAP_SLICE (p, i) = 0;
              }
            xfree (IMAGE_INSTANCE_GTK_PIXMAP_SLICES (p));
            IMAGE_INSTANCE_GTK_PIXMAP_SLICES (p) = 0;
          }

        if (IMAGE_INSTANCE_GTK_CURSOR (p))
          {
            gdk_cursor_destroy (IMAGE_INSTANCE_GTK_CURSOR (p));
            IMAGE_INSTANCE_GTK_CURSOR (p) = 0;
          }
      }

#if 0
          /* #### BILL!!! */
      if (IMAGE_INSTANCE_GTK_NPIXELS (p) != 0)
      {
        XFreeColors (dpy,
                   IMAGE_INSTANCE_GTK_COLORMAP (p),
                   IMAGE_INSTANCE_GTK_PIXELS (p),
                   IMAGE_INSTANCE_GTK_NPIXELS (p), 0);
        IMAGE_INSTANCE_GTK_NPIXELS (p) = 0;
      }
#endif
    }

  if (IMAGE_INSTANCE_TYPE (p) != IMAGE_WIDGET
      && IMAGE_INSTANCE_TYPE (p) != IMAGE_SUBWINDOW
      && IMAGE_INSTANCE_GTK_PIXELS (p))
    {
      xfree (IMAGE_INSTANCE_GTK_PIXELS (p));
      IMAGE_INSTANCE_GTK_PIXELS (p) = 0;
    }

  xfree (p->data);
  p->data = 0;
}

static int
gtk_image_instance_equal (struct Lisp_Image_Instance *p1,
                    struct Lisp_Image_Instance *p2, int depth)
{
  switch (IMAGE_INSTANCE_TYPE (p1))
    {
    case IMAGE_MONO_PIXMAP:
    case IMAGE_COLOR_PIXMAP:
    case IMAGE_POINTER:
      if (IMAGE_INSTANCE_GTK_COLORMAP (p1) != IMAGE_INSTANCE_GTK_COLORMAP (p2) ||
        IMAGE_INSTANCE_GTK_NPIXELS (p1) != IMAGE_INSTANCE_GTK_NPIXELS (p2))
      return 0;
#if HAVE_SUBWINDOWS
    case IMAGE_SUBWINDOW:
      /* #### implement me */
#endif
      break;
    default:
      break;
    }

  return 1;
}

static unsigned long
gtk_image_instance_hash (struct Lisp_Image_Instance *p, int depth)
{
  switch (IMAGE_INSTANCE_TYPE (p))
    {
    case IMAGE_MONO_PIXMAP:
    case IMAGE_COLOR_PIXMAP:
    case IMAGE_POINTER:
      return IMAGE_INSTANCE_GTK_NPIXELS (p);
#if HAVE_SUBWINDOWS
    case IMAGE_SUBWINDOW:
      /* #### implement me */
      return 0;
#endif
    default:
      return 0;
    }
}

/* Set all the slots in an image instance structure to reasonable
   default values.  This is used somewhere within an instantiate
   method.  It is assumed that the device slot within the image
   instance is already set -- this is the case when instantiate
   methods are called. */

static void
gtk_initialize_pixmap_image_instance (struct Lisp_Image_Instance *ii,
                              int slices,
                              enum image_instance_type type)
{
  ii->data = xnew_and_zero (struct gtk_image_instance_data);
  IMAGE_INSTANCE_PIXMAP_MAXSLICE (ii) = slices;
  IMAGE_INSTANCE_GTK_PIXMAP_SLICES (ii) =
    xnew_array_and_zero (GdkPixmap *, slices);
  IMAGE_INSTANCE_TYPE (ii) = type;
  IMAGE_INSTANCE_PIXMAP_FILENAME (ii) = Qnil;
  IMAGE_INSTANCE_PIXMAP_MASK_FILENAME (ii) = Qnil;
  IMAGE_INSTANCE_PIXMAP_HOTSPOT_X (ii) = Qnil;
  IMAGE_INSTANCE_PIXMAP_HOTSPOT_Y (ii) = Qnil;
  IMAGE_INSTANCE_PIXMAP_FG (ii) = Qnil;
  IMAGE_INSTANCE_PIXMAP_BG (ii) = Qnil;
}


/************************************************************************/
/*                        pixmap file functions                         */
/************************************************************************/

/* Where bitmaps are; initialized from resource database */
Lisp_Object Vgtk_bitmap_file_path;

#ifndef BITMAPDIR
#define BITMAPDIR "/usr/include/X11/bitmaps"
#endif

/* Given a pixmap filename, look through all of the "standard" places
   where the file might be located.  Return a full pathname if found;
   otherwise, return Qnil. */

static Lisp_Object
gtk_locate_pixmap_file (Lisp_Object name)
{
  /* This function can GC if IN_REDISPLAY is false */

  /* Check non-absolute pathnames with a directory component relative to
     the search path; that's the way Xt does it. */
  /* #### Unix-specific */
  if (XSTRING_BYTE (name, 0) == '/' ||
      (XSTRING_BYTE (name, 0) == '.' &&
       (XSTRING_BYTE (name, 1) == '/' ||
      (XSTRING_BYTE (name, 1) == '.' &&
       (XSTRING_BYTE (name, 2) == '/')))))
    {
      if (!NILP (Ffile_readable_p (name)))
      return name;
      else
      return Qnil;
    }

  if (NILP (Vdefault_gtk_device))
    /* This may occur during intialization. */
    return Qnil;

  if (NILP (Vgtk_bitmap_file_path))
    {
      Vgtk_bitmap_file_path = nconc2 (Vgtk_bitmap_file_path,
                              (decode_path (BITMAPDIR)));
    }

  {
    Lisp_Object found;
    if (locate_file (Vgtk_bitmap_file_path, name, Qnil, &found, R_OK) < 0)
      {
      Lisp_Object temp = list1 (Vdata_directory);
      struct gcpro gcpro1;

      GCPRO1 (temp);
      locate_file (temp, name, Qnil, &found, R_OK);
      UNGCPRO;
      }

    return found;
  }
}

static Lisp_Object
locate_pixmap_file (Lisp_Object name)
{
  return gtk_locate_pixmap_file (name);
}


/************************************************************************/
/*                           cursor functions                           */
/************************************************************************/

/* Check that this server supports cursors of size WIDTH * HEIGHT.  If
   not, signal an error.  INSTANTIATOR is only used in the error
   message. */

static void
check_pointer_sizes (unsigned int width, unsigned int height,
                 Lisp_Object instantiator)
{
    /* #### BILL!!! There is no way to call XQueryBestCursor from Gdk! */
#if 0
  unsigned int best_width, best_height;
  if (! XQueryBestCursor (DisplayOfScreen (xs), RootWindowOfScreen (xs),
                    width, height, &best_width, &best_height))
    /* this means that an X error of some sort occurred (we trap
       these so they're not fatal). */
    signal_simple_error ("XQueryBestCursor() failed?", instantiator);

  if (width > best_width || height > best_height)
    error_with_frob (instantiator,
                 "pointer too large (%dx%d): "
                 "server requires %dx%d or smaller",
                 width, height, best_width, best_height);
#endif
}

static void
generate_cursor_fg_bg (Lisp_Object device, Lisp_Object *foreground,
                   Lisp_Object *background, GdkColor *xfg, GdkColor *xbg)
{
  if (!NILP (*foreground) && !COLOR_INSTANCEP (*foreground))
    *foreground =
      Fmake_color_instance (*foreground, device,
                      encode_error_behavior_flag (ERROR_ME));
  if (COLOR_INSTANCEP (*foreground))
    *xfg = * COLOR_INSTANCE_GTK_COLOR (XCOLOR_INSTANCE (*foreground));
  else
    {
      xfg->pixel = 0;
      xfg->red = xfg->green = xfg->blue = 0;
    }

  if (!NILP (*background) && !COLOR_INSTANCEP (*background))
    *background =
      Fmake_color_instance (*background, device,
                      encode_error_behavior_flag (ERROR_ME));
  if (COLOR_INSTANCEP (*background))
    *xbg = * COLOR_INSTANCE_GTK_COLOR (XCOLOR_INSTANCE (*background));
  else
    {
      xbg->pixel = 0;
      xbg->red = xbg->green = xbg->blue = ~0;
    }
}

static void
maybe_recolor_cursor (Lisp_Object image_instance, Lisp_Object foreground,
                  Lisp_Object background)
{
#if 0
    /* #### BILL!!! */
  Lisp_Object device = XIMAGE_INSTANCE_DEVICE (image_instance);
  GdkColor xfg, xbg;

  generate_cursor_fg_bg (device, &foreground, &background, &xfg, &xbg);
  if (!NILP (foreground) || !NILP (background))
    {
      XRecolorCursor (DEVICE_X_DISPLAY (XDEVICE (device)),
                  XIMAGE_INSTANCE_GTK_CURSOR (image_instance),
                  &xfg, &xbg);
      XIMAGE_INSTANCE_PIXMAP_FG (image_instance) = foreground;
      XIMAGE_INSTANCE_PIXMAP_BG (image_instance) = background;
    }
#else
  /* stderr_out ("Don't know how to recolor cursors in Gtk!\n"); */
#endif
}


/************************************************************************/
/*                        color pixmap functions                        */
/************************************************************************/

/* Initialize an image instance from an XImage.

   DEST_MASK specifies the mask of allowed image types.

   PIXELS and NPIXELS specify an array of pixels that are used in
   the image.  These need to be kept around for the duration of the
   image.  When the image instance is freed, XFreeColors() will
   automatically be called on all the pixels specified here; thus,
   you should have allocated the pixels yourself using XAllocColor()
   or the like.  The array passed in is used directly without
   being copied, so it should be heap data created with xmalloc().
   It will be freed using xfree() when the image instance is
   destroyed.

   If this fails, signal an error.  INSTANTIATOR is only used
   in the error message.

   #### This should be able to handle conversion into `pointer'.
   Use the same code as for `xpm'. */

static void
init_image_instance_from_gdk_image (struct Lisp_Image_Instance *ii,
                            GdkImage *gdk_image,
                            int dest_mask,
                            GdkColormap *cmap,
                            unsigned long *pixels,
                            int npixels,
                            int slices,
                            Lisp_Object instantiator)
{
  Lisp_Object device = IMAGE_INSTANCE_DEVICE (ii);
  GdkGC *gc;
  GdkWindow *d;
  GdkPixmap *pixmap;

  if (!DEVICE_GTK_P (XDEVICE (device)))
    signal_simple_error ("Not a Gtk device", device);

  d = GET_GTK_WIDGET_WINDOW (DEVICE_GTK_APP_SHELL (XDEVICE (device)));

  if (!(dest_mask & IMAGE_COLOR_PIXMAP_MASK))
    incompatible_image_types (instantiator, dest_mask,
                        IMAGE_COLOR_PIXMAP_MASK);

  pixmap = gdk_pixmap_new (d, gdk_image->width, gdk_image->height, gdk_image->depth);
  if (!pixmap)
    signal_simple_error ("Unable to create pixmap", instantiator);

  gc = gdk_gc_new (pixmap);
  if (!gc)
    {
      gdk_pixmap_unref (pixmap);
      signal_simple_error ("Unable to create GC", instantiator);
    }

  gdk_draw_image (GDK_DRAWABLE (pixmap), gc, gdk_image,
              0, 0, 0, 0, gdk_image->width, gdk_image->height);

  gdk_gc_destroy (gc);

  gtk_initialize_pixmap_image_instance (ii, slices, IMAGE_COLOR_PIXMAP);

  IMAGE_INSTANCE_PIXMAP_FILENAME (ii) =
    find_keyword_in_vector (instantiator, Q_file);

  IMAGE_INSTANCE_GTK_PIXMAP (ii) = pixmap;
  IMAGE_INSTANCE_GTK_MASK (ii) = 0;
  IMAGE_INSTANCE_PIXMAP_WIDTH (ii) = gdk_image->width;
  IMAGE_INSTANCE_PIXMAP_HEIGHT (ii) = gdk_image->height;
  IMAGE_INSTANCE_PIXMAP_DEPTH (ii) = gdk_image->depth;
  IMAGE_INSTANCE_GTK_COLORMAP (ii) = cmap;
  IMAGE_INSTANCE_GTK_PIXELS (ii) = pixels;
  IMAGE_INSTANCE_GTK_NPIXELS (ii) = npixels;
}

#if 0
void init_image_instance_from_gdk_pixmap (struct Lisp_Image_Instance *ii,
                                struct device *device,
                                GdkPixmap *gdk_pixmap,
                                int dest_mask,
                                Lisp_Object instantiator)
{
  GdkWindow *d;
  gint width, height, depth;

  if (!DEVICE_GTK_P (device))
    ABORT ();

  IMAGE_INSTANCE_DEVICE (ii) = device;
  IMAGE_INSTANCE_TYPE (ii) = IMAGE_COLOR_PIXMAP;

  d = GET_GTK_WIDGET_WINDOW (DEVICE_GTK_APP_SHELL (device));

  if (!(dest_mask & IMAGE_COLOR_PIXMAP_MASK))
    incompatible_image_types (instantiator, dest_mask,
                        IMAGE_COLOR_PIXMAP_MASK);

  gtk_initialize_pixmap_image_instance (ii, IMAGE_COLOR_PIXMAP);

  gdk_window_get_geometry (gdk_pixmap, NULL, NULL, &width, &height, &depth);

  IMAGE_INSTANCE_PIXMAP_FILENAME (ii) = Qnil;
  IMAGE_INSTANCE_GTK_PIXMAP (ii) = gdk_pixmap;
  IMAGE_INSTANCE_GTK_MASK (ii) = 0;
  IMAGE_INSTANCE_PIXMAP_WIDTH (ii) = width;
  IMAGE_INSTANCE_PIXMAP_HEIGHT (ii) = height;
  IMAGE_INSTANCE_PIXMAP_DEPTH (ii) = depth;
  IMAGE_INSTANCE_GTK_COLORMAP (ii) = gdk_window_get_colormap (gdk_pixmap);
  IMAGE_INSTANCE_GTK_PIXELS (ii) = 0;
  IMAGE_INSTANCE_GTK_NPIXELS (ii) = 0;
}
#endif

static void
image_instance_add_gdk_image (Lisp_Image_Instance *ii,
                        GdkImage *gdk_image,
                        int slice,
                        Lisp_Object instantiator)
{
  Lisp_Object device = IMAGE_INSTANCE_DEVICE (ii);
  GdkWindow *d;
  GdkPixmap *pixmap;
  GdkGC *gc;

  d = GET_GTK_WIDGET_WINDOW (DEVICE_GTK_APP_SHELL (XDEVICE (device)));

  pixmap = gdk_pixmap_new (d, gdk_image->width, gdk_image->height, gdk_image->depth);

  if (!pixmap)
    signal_simple_error ("Unable to create pixmap", instantiator);

  gc = gdk_gc_new (pixmap);

  if (!gc)
    {
      gdk_pixmap_unref (pixmap);
      signal_simple_error ("Unable to create GC", instantiator);
    }

  gdk_draw_image (GDK_DRAWABLE (pixmap), gc, gdk_image, 0, 0, 0, 0,
              gdk_image->width, gdk_image->height);

  gdk_gc_destroy (gc);

  IMAGE_INSTANCE_GTK_PIXMAP_SLICE (ii, slice) = pixmap;
}

static void
gtk_init_image_instance_from_eimage (struct Lisp_Image_Instance *ii,
                             int width, int height,
                             int slices,
                             unsigned char *eimage, 
                             int dest_mask,
                             Lisp_Object instantiator,
                             Lisp_Object domain)
{
  Lisp_Object device = IMAGE_INSTANCE_DEVICE (ii);
  GdkColormap *cmap = DEVICE_GTK_COLORMAP (XDEVICE(device));
  unsigned long *pixtbl = NULL;
  int npixels = 0;
  int slice;
  GdkImage* gdk_image;


  for (slice = 0; slice < slices; slice++)
    {
      gdk_image = convert_EImage_to_GDKImage (device, width, height, eimage,
                                    &pixtbl, &npixels);
      if (!gdk_image)
      {
        if (pixtbl) xfree (pixtbl);
        signal_image_error("EImage to GdkImage conversion failed", instantiator);
      }

      if (slice == 0)
      /* Now create the pixmap and set up the image instance */
      init_image_instance_from_gdk_image (ii, gdk_image, dest_mask,
                                  cmap, pixtbl, npixels, slices,
                                  instantiator);
      else
      image_instance_add_gdk_image (ii, gdk_image, slice, instantiator);

      if (gdk_image)
      {
        gdk_image_destroy (gdk_image);
      }
      gdk_image = 0;
    }
}

/* Given inline data for a mono pixmap, create and return the
   corresponding X object. */

static GdkPixmap *
pixmap_from_xbm_inline (Lisp_Object device, int width, int height,
                  /* Note that data is in ext-format! */
                  CONST Extbyte *bits)
{
    return (gdk_bitmap_create_from_data (GET_GTK_WIDGET_WINDOW (DEVICE_GTK_APP_SHELL (XDEVICE (device))),
                               (char *) bits, width, height));
}

/* Given inline data for a mono pixmap, initialize the given
   image instance accordingly. */

static void
init_image_instance_from_xbm_inline (struct Lisp_Image_Instance *ii,
                             int width, int height,
                             /* Note that data is in ext-format! */
                             CONST char *bits,
                             Lisp_Object instantiator,
                             Lisp_Object pointer_fg,
                             Lisp_Object pointer_bg,
                             int dest_mask,
                             GdkPixmap *mask,
                             Lisp_Object mask_filename)
{
  Lisp_Object device = IMAGE_INSTANCE_DEVICE (ii);
  Lisp_Object foreground = find_keyword_in_vector (instantiator, Q_foreground);
  Lisp_Object background = find_keyword_in_vector (instantiator, Q_background);
  GdkColor fg;
  GdkColor bg;
  enum image_instance_type type;
  GdkWindow *draw = GET_GTK_WIDGET_WINDOW (DEVICE_GTK_APP_SHELL (XDEVICE (device)));
  GdkColormap *cmap = DEVICE_GTK_COLORMAP (XDEVICE(device));
  GdkColor black;
  GdkColor white;

  gdk_color_black(cmap, &black);
  gdk_color_white(cmap, &white);

  if (!DEVICE_GTK_P (XDEVICE (device)))
    signal_simple_error ("Not a Gtk device", device);

  if ((dest_mask & IMAGE_MONO_PIXMAP_MASK) &&
      (dest_mask & IMAGE_COLOR_PIXMAP_MASK))
    {
      if (!NILP (foreground) || !NILP (background))
      type = IMAGE_COLOR_PIXMAP;
      else
      type = IMAGE_MONO_PIXMAP;
    }
  else if (dest_mask & IMAGE_MONO_PIXMAP_MASK)
    type = IMAGE_MONO_PIXMAP;
  else if (dest_mask & IMAGE_COLOR_PIXMAP_MASK)
    type = IMAGE_COLOR_PIXMAP;
  else if (dest_mask & IMAGE_POINTER_MASK)
    type = IMAGE_POINTER;
  else
    incompatible_image_types (instantiator, dest_mask,
                        IMAGE_MONO_PIXMAP_MASK | IMAGE_COLOR_PIXMAP_MASK
                        | IMAGE_POINTER_MASK);

  gtk_initialize_pixmap_image_instance (ii, 1, type);
  IMAGE_INSTANCE_PIXMAP_WIDTH (ii) = width;
  IMAGE_INSTANCE_PIXMAP_HEIGHT (ii) = height;
  IMAGE_INSTANCE_PIXMAP_FILENAME (ii) =
    find_keyword_in_vector (instantiator, Q_file);

  switch (type)
    {
    case IMAGE_MONO_PIXMAP:
      {
      IMAGE_INSTANCE_GTK_PIXMAP (ii) =
        pixmap_from_xbm_inline (device, width, height, (Extbyte *) bits);
      }
      break;

    case IMAGE_COLOR_PIXMAP:
      {
      gint d = DEVICE_GTK_DEPTH (XDEVICE(device));

      if (!NILP (foreground) && !COLOR_INSTANCEP (foreground))
        foreground =
          Fmake_color_instance (foreground, device,
                          encode_error_behavior_flag (ERROR_ME));

      if (COLOR_INSTANCEP (foreground))
        fg = * COLOR_INSTANCE_GTK_COLOR (XCOLOR_INSTANCE (foreground));

      if (!NILP (background) && !COLOR_INSTANCEP (background))
        background =
          Fmake_color_instance (background, device,
                          encode_error_behavior_flag (ERROR_ME));

      if (COLOR_INSTANCEP (background))
        bg = * COLOR_INSTANCE_GTK_COLOR (XCOLOR_INSTANCE (background));

      /* We used to duplicate the pixels using XAllocColor(), to protect
         against their getting freed.  Just as easy to just store the
         color instances here and GC-protect them, so this doesn't
         happen. */
      IMAGE_INSTANCE_PIXMAP_FG (ii) = foreground;
      IMAGE_INSTANCE_PIXMAP_BG (ii) = background;
      IMAGE_INSTANCE_GTK_PIXMAP (ii) =
          gdk_pixmap_create_from_data (draw, (char *) bits, width, height, d, &fg, &bg);
      IMAGE_INSTANCE_PIXMAP_DEPTH (ii) = d;
      }
      break;

    case IMAGE_POINTER:
    {
      GdkColor fg_color, bg_color;
      GdkPixmap *source;

      check_pointer_sizes (width, height, instantiator);

      source = gdk_pixmap_create_from_data (draw, (char *) bits, width, height, 1, &black, &white);

      if (NILP (foreground))
        foreground = pointer_fg;
      if (NILP (background))
        background = pointer_bg;
      generate_cursor_fg_bg (device, &foreground, &background,
                         &fg_color, &bg_color);

      IMAGE_INSTANCE_PIXMAP_FG (ii) = foreground;
      IMAGE_INSTANCE_PIXMAP_BG (ii) = background;
      IMAGE_INSTANCE_PIXMAP_HOTSPOT_X (ii) =
        find_keyword_in_vector (instantiator, Q_hotspot_x);
      IMAGE_INSTANCE_PIXMAP_HOTSPOT_Y (ii) =
        find_keyword_in_vector (instantiator, Q_hotspot_y);
      IMAGE_INSTANCE_GTK_CURSOR (ii) =
          gdk_cursor_new_from_pixmap (source, mask, &fg_color, &bg_color,
                              !NILP (IMAGE_INSTANCE_PIXMAP_HOTSPOT_X (ii)) ?
                              XINT (IMAGE_INSTANCE_PIXMAP_HOTSPOT_X (ii)) : 0,
                              !NILP (IMAGE_INSTANCE_PIXMAP_HOTSPOT_Y (ii)) ?
                              XINT (IMAGE_INSTANCE_PIXMAP_HOTSPOT_Y (ii)) : 0);
      }
      break;

    default:
      ABORT ();
    }
}

static void
xbm_instantiate_1 (Lisp_Object image_instance, Lisp_Object instantiator,
               Lisp_Object pointer_fg, Lisp_Object pointer_bg,
               int dest_mask, int width, int height,
               /* Note that data is in ext-format! */
               CONST char *bits)
{
  Lisp_Object mask_data = find_keyword_in_vector (instantiator, Q_mask_data);
  Lisp_Object mask_file = find_keyword_in_vector (instantiator, Q_mask_file);
  struct Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
  GdkPixmap *mask = 0;
  CONST char *gcc_may_you_rot_in_hell;

  if (!NILP (mask_data))
    {
      TO_EXTERNAL_FORMAT (LISP_STRING, XCAR (XCDR (XCDR (mask_data))),
                    C_STRING_ALLOCA, gcc_may_you_rot_in_hell,
                    Qfile_name);
      mask =
      pixmap_from_xbm_inline (IMAGE_INSTANCE_DEVICE (ii),
                        XINT (XCAR (mask_data)),
                        XINT (XCAR (XCDR (mask_data))),
                        (CONST unsigned char *)
                        gcc_may_you_rot_in_hell);
    }

  init_image_instance_from_xbm_inline (ii, width, height, bits,
                               instantiator, pointer_fg, pointer_bg,
                               dest_mask, mask, mask_file);
}

/* Instantiate method for XBM's. */

static void
gtk_xbm_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
                 Lisp_Object pointer_fg, Lisp_Object pointer_bg,
                 int dest_mask, Lisp_Object domain)
{
  Lisp_Object data = find_keyword_in_vector (instantiator, Q_data);
  CONST char *gcc_go_home;

  assert (!NILP (data));

  TO_EXTERNAL_FORMAT (LISP_STRING, XCAR (XCDR (XCDR (data))),
                  C_STRING_ALLOCA, gcc_go_home,
                  Qbinary);

  xbm_instantiate_1 (image_instance, instantiator, pointer_fg,
                 pointer_bg, dest_mask, XINT (XCAR (data)),
                 XINT (XCAR (XCDR (data))), gcc_go_home);
}


#ifdef HAVE_XPM
/**********************************************************************
 *                             XPM                                    *
 **********************************************************************/

/* strcasecmp() is not sufficiently portable or standard,
   and it's easier just to write our own. */
static int
ascii_strcasecmp (const char *s1, const char *s2)
{
  while (1)
    {
      char c1 = *s1++;
      char c2 = *s2++;
      if (c1 >= 'A' && c1 <= 'Z') c1 += 'a' - 'A';
      if (c2 >= 'A' && c2 <= 'Z') c2 += 'a' - 'A';
      if (c1 != c2) return c1 - c2;
      if (c1 == '\0') return 0;
    }
}

struct color_symbol
{
  char*           name;
  GdkColor  color;
};

static struct color_symbol*
extract_xpm_color_names (Lisp_Object device,
                   Lisp_Object domain,
                   Lisp_Object color_symbol_alist,
                   int* nsymbols)
{
  /* This function can GC */
  Lisp_Object rest;
  Lisp_Object results = Qnil;
  int i, j;
  struct color_symbol *colortbl;
  struct gcpro gcpro1, gcpro2;

  GCPRO2 (results, device);

  /* We built up results to be (("name" . #<color>) ...) so that if an
     error happens we don't lose any malloc()ed data, or more importantly,
     leave any pixels allocated in the server. */
  i = 0;
  LIST_LOOP (rest, color_symbol_alist)
    {
      Lisp_Object cons = XCAR (rest);
      Lisp_Object name = XCAR (cons);
      Lisp_Object value = XCDR (cons);
      if (NILP (value))
      continue;
      if (STRINGP (value))
      value =
        Fmake_color_instance
        (value, device, encode_error_behavior_flag (ERROR_ME_NOT));
      else
        {
          assert (COLOR_SPECIFIERP (value));
          value = Fspecifier_instance (value, domain, Qnil, Qnil);
        }
      if (NILP (value))
        continue;
      results = noseeum_cons (noseeum_cons (name, value), results);
      i++;
    }
  UNGCPRO;              /* no more evaluation */

  *nsymbols=i;
  if (i == 0) return 0;

  colortbl = xnew_array_and_zero (struct color_symbol, i);

  for (j=0; j<i; j++)
    {
      Lisp_Object cons = XCAR (results);
      colortbl[j].color = 
      * COLOR_INSTANCE_GTK_COLOR (XCOLOR_INSTANCE (XCDR (cons)));

      colortbl[j].name = (char *) XSTRING_DATA (XCAR (cons));
      free_cons (XCONS (cons));
      cons = results;
      results = XCDR (results);
      free_cons (XCONS (cons));
    }
  return colortbl;
}

static void
gtk_xpm_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
                 Lisp_Object pointer_fg, Lisp_Object pointer_bg,
                 int dest_mask, Lisp_Object domain)
{
  /* This function can GC */
  char temp_file_name[1024];
  struct Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
  Lisp_Object device = IMAGE_INSTANCE_DEVICE (ii);
  Lisp_Object data = find_keyword_in_vector (instantiator, Q_data);
  GdkColormap *cmap;
  int depth;
  GdkVisual *visual;
  GdkPixmap *pixmap;
  GdkPixmap *mask = 0;
  GdkWindow *window = 0;
  int nsymbols = 0, i = 0;
  struct color_symbol *color_symbols = NULL;
  Lisp_Object color_symbol_alist = find_keyword_in_vector (instantiator,
                                             Q_color_symbols);
  enum image_instance_type type;
  int force_mono;
  unsigned int w, h;
  const unsigned char * volatile dstring;

  if (!DEVICE_GTK_P (XDEVICE (device)))
    signal_simple_error ("Not a Gtk device", device);

  if (dest_mask & IMAGE_COLOR_PIXMAP_MASK)
    type = IMAGE_COLOR_PIXMAP;
  else if (dest_mask & IMAGE_MONO_PIXMAP_MASK)
    type = IMAGE_MONO_PIXMAP;
  else if (dest_mask & IMAGE_POINTER_MASK)
    type = IMAGE_POINTER;
  else
    incompatible_image_types (instantiator, dest_mask,
                        IMAGE_MONO_PIXMAP_MASK | IMAGE_COLOR_PIXMAP_MASK
                        | IMAGE_POINTER_MASK);
  force_mono = (type != IMAGE_COLOR_PIXMAP);

  window = GET_GTK_WIDGET_WINDOW (DEVICE_GTK_APP_SHELL (XDEVICE (device)));
  cmap = DEVICE_GTK_COLORMAP (XDEVICE (device));
  depth = DEVICE_GTK_DEPTH (XDEVICE (device));
  visual = DEVICE_GTK_VISUAL (XDEVICE (device));

  gtk_initialize_pixmap_image_instance (ii, 1, type);

  assert (!NILP (data));

  /* Extract all the entries from xpm-color-symbols */
  color_symbols = extract_xpm_color_names (device, domain, color_symbol_alist,
                                 &nsymbols);

  assert (!NILP (data));


  LISP_STRING_TO_EXTERNAL(data, dstring, Qbinary);

  /*
   * GTK only uses the 'c' color entry of an XPM and doesn't use the symbolic
   * color names at all.  This is unfortunate because the way to change the
   * colors from lisp is by adding the symbolic names, and the new colors, to
   * the variable xpm-color-symbols.
   *
   * To get around this decode the XPM, add a 'c' entry of the desired color
   * for each matching symbolic color, recode the XPM and pass it to GTK.  The
   * decode and recode stages aren't too bad because this also performs the
   * external to internal format translation, which avoids contortions like
   * writing the XPM back to disk in order to get it processed.
   */

  {
    XpmImage image;
    XpmInfo info;
    char** data;

    XpmCreateXpmImageFromBuffer ((char*) dstring, &image, &info);

    for (i = 0; i < nsymbols; i++)
      {
      unsigned j;

      for (j = 0; j < image.ncolors; j++)
        {
          if (image.colorTable[j].symbolic != NULL &&
            !ascii_strcasecmp(color_symbols[i].name, image.colorTable[j].symbolic))
            {
            image.colorTable[j].c_color = xmalloc(16);

            sprintf(image.colorTable[j].c_color, "#%.4x%.4x%.4x",
                  color_symbols[i].color.red, color_symbols[i].color.green,
                  color_symbols[i].color.blue);
            }
        }
      }

    XpmCreateDataFromXpmImage (&data, &image, &info);

    pixmap = gdk_pixmap_create_from_xpm_d (window, &mask, NULL,
                                 data);
  }

  if (color_symbols) xfree (color_symbols);

  if (!pixmap)
  {
    signal_image_error ("Error reading pixmap", data);
  }

  gdk_window_get_geometry (pixmap, NULL, NULL, &w, &h, &depth);

  IMAGE_INSTANCE_GTK_PIXMAP (ii) = pixmap;
  IMAGE_INSTANCE_PIXMAP_MASK (ii) = (void*) mask;
  IMAGE_INSTANCE_GTK_COLORMAP (ii) = cmap;
  IMAGE_INSTANCE_GTK_PIXELS (ii) = 0;
  IMAGE_INSTANCE_GTK_NPIXELS (ii) = 0;
  IMAGE_INSTANCE_PIXMAP_WIDTH (ii) = w;
  IMAGE_INSTANCE_PIXMAP_HEIGHT (ii) = h;
  IMAGE_INSTANCE_PIXMAP_FILENAME (ii) =
    find_keyword_in_vector (instantiator, Q_file);

  switch (type)
    {
    case IMAGE_MONO_PIXMAP:
      break;

    case IMAGE_COLOR_PIXMAP:
      {
      IMAGE_INSTANCE_PIXMAP_DEPTH (ii) = depth;
      }
      break;

    case IMAGE_POINTER:
      {
      GdkColor fg, bg;
      unsigned int xhot, yhot;

      /* #### Gtk does not give us access to the hotspots of a pixmap */
      xhot = yhot = 1;
      XSETINT (IMAGE_INSTANCE_PIXMAP_HOTSPOT_X (ii), xhot);
      XSETINT (IMAGE_INSTANCE_PIXMAP_HOTSPOT_Y (ii), yhot);

      check_pointer_sizes (w, h, instantiator);

      /* If the loaded pixmap has colors allocated (meaning it came from an
         XPM file), then use those as the default colors for the cursor we
         create.  Otherwise, default to pointer_fg and pointer_bg.
      */
      if (depth > 1)
        {
          warn_when_safe (Qunimplemented, Qnotice,
                      "GTK does not support XPM cursors...\n");
          IMAGE_INSTANCE_GTK_CURSOR (ii) = gdk_cursor_new (GDK_COFFEE_MUG);
        }
      else
        {
          generate_cursor_fg_bg (device, &pointer_fg, &pointer_bg,
                           &fg, &bg);
          IMAGE_INSTANCE_PIXMAP_FG (ii) = pointer_fg;
          IMAGE_INSTANCE_PIXMAP_BG (ii) = pointer_bg;
          IMAGE_INSTANCE_GTK_CURSOR (ii) = gdk_cursor_new_from_pixmap (pixmap, mask, &fg, &bg, xhot, yhot);
        }
      }

      break;

    default:
      ABORT ();
    }
}
#endif /* HAVE_XPM */


#ifdef HAVE_XFACE

/**********************************************************************
 *                             X-Face                                 *
 **********************************************************************/
#if defined(EXTERN)
/* This is about to get redefined! */
#undef EXTERN
#endif
/* We have to define SYSV32 so that compface.h includes string.h
   instead of strings.h. */
#define SYSV32
#ifdef __cplusplus
extern "C" {
#endif
#include <compface.h>
#ifdef __cplusplus
}
#endif
/* JMP_BUF cannot be used here because if it doesn't get defined
   to jmp_buf we end up with a conflicting type error with the
   definition in compface.h */
extern jmp_buf comp_env;
#undef SYSV32

static void
gtk_xface_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
               Lisp_Object pointer_fg, Lisp_Object pointer_bg,
               int dest_mask, Lisp_Object domain)
{
  Lisp_Object data = find_keyword_in_vector (instantiator, Q_data);
  int i, stattis;
  char *p, *bits, *bp;
  CONST char * volatile emsg = 0;
  CONST char * volatile dstring;

  assert (!NILP (data));

  LISP_STRING_TO_EXTERNAL (data, dstring, Qbinary);

  if ((p = strchr (dstring, ':')))
    {
      dstring = p + 1;
    }

  /* Must use setjmp not SETJMP because we used jmp_buf above not JMP_BUF */
  if (!(stattis = setjmp (comp_env)))
    {
      UnCompAll ((char *) dstring);
      UnGenFace ();
    }

  switch (stattis)
    {
    case -2:
      emsg = "uncompface: internal error";
      break;
    case -1:
      emsg = "uncompface: insufficient or invalid data";
      break;
    case 1:
      emsg = "uncompface: excess data ignored";
      break;
    }

  if (emsg)
    signal_simple_error_2 (emsg, data, Qimage);

  bp = bits = (char *) alloca (PIXELS / 8);

  /* the compface library exports char F[], which uses a single byte per
     pixel to represent a 48x48 bitmap.  Yuck. */
  for (i = 0, p = F; i < (PIXELS / 8); ++i)
    {
      int n, b;
      /* reverse the bit order of each byte... */
      for (b = n = 0; b < 8; ++b)
      {
        n |= ((*p++) << b);
      }
      *bp++ = (char) n;
    }

  xbm_instantiate_1 (image_instance, instantiator, pointer_fg,
                 pointer_bg, dest_mask, 48, 48, bits);
}

#endif /* HAVE_XFACE */

/**********************************************************************
 *                             RESOURCES                              *
 **********************************************************************/

static void
gtk_resource_validate (Lisp_Object instantiator)
{
  if ((NILP (find_keyword_in_vector (instantiator, Q_file)) 
       &&
       NILP (find_keyword_in_vector (instantiator, Q_resource_id))) 
      ||
      NILP (find_keyword_in_vector (instantiator, Q_resource_type)))
    signal_simple_error ("Must supply :file, :resource-id and :resource-type",
                   instantiator);
}

static Lisp_Object
gtk_resource_normalize (Lisp_Object inst, Lisp_Object console_type, Lisp_Object dest_mask)
{
  /* This function can call lisp */
  Lisp_Object file = Qnil;
  struct gcpro gcpro1, gcpro2;
  Lisp_Object alist = Qnil;

  GCPRO2 (file, alist);

  file = potential_pixmap_file_instantiator (inst, Q_file, Q_data, 
                                   console_type);

  if (CONSP (file)) /* failure locating filename */
    signal_double_file_error ("Opening pixmap file",
                        "no such file or directory",
                        Fcar (file));

  if (NILP (file)) /* no conversion necessary */
    RETURN_UNGCPRO (inst);

  alist = tagged_vector_to_alist (inst);

  {
    alist = remassq_no_quit (Q_file, alist);
    alist = Fcons (Fcons (Q_file, file), alist);
  }

  {
    Lisp_Object result = alist_to_tagged_vector (Qgtk_resource, alist);
    free_alist (alist);
    RETURN_UNGCPRO (result);
  }
}

static int
gtk_resource_possible_dest_types (void)
{
  return IMAGE_POINTER_MASK | IMAGE_COLOR_PIXMAP_MASK;
}

extern guint symbol_to_enum (Lisp_Object, GtkType);

static guint resource_name_to_resource (Lisp_Object name, int type)
{
  if (type == IMAGE_POINTER)
    return (symbol_to_enum (name, GTK_TYPE_GDK_CURSOR_TYPE));
  else
    return (0);
}

static int
resource_symbol_to_type (Lisp_Object data)
{
  if (EQ (data, Qcursor))
    return IMAGE_POINTER;
#if 0
  else if (EQ (data, Qicon))
    return IMAGE_ICON;
  else if (EQ (data, Qbitmap))
    return IMAGE_BITMAP;
#endif
  else
    return 0;
}

static void
gtk_resource_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
                    Lisp_Object pointer_fg, Lisp_Object pointer_bg,
                    int dest_mask, Lisp_Object domain)
{
  struct Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
  GdkCursor *c = NULL;
  unsigned int type = 0;
  Lisp_Object device = IMAGE_INSTANCE_DEVICE (ii);
  Lisp_Object resource_type = find_keyword_in_vector (instantiator, Q_resource_type);
  Lisp_Object resource_id = find_keyword_in_vector (instantiator, Q_resource_id);

  if (!DEVICE_GTK_P (XDEVICE (device)))
    signal_simple_error ("Not a GTK device", device);

  type = resource_symbol_to_type (resource_type);

#if 0
  if (dest_mask & IMAGE_POINTER_MASK && type == IMAGE_POINTER_MASK)
    iitype = IMAGE_POINTER;
  else if (dest_mask & IMAGE_COLOR_PIXMAP_MASK)
    iitype = IMAGE_COLOR_PIXMAP;
  else 
    incompatible_image_types (instantiator, dest_mask,
                        IMAGE_COLOR_PIXMAP_MASK | IMAGE_POINTER_MASK);
#endif

  /* mess with the keyword info we were provided with */
  gtk_initialize_pixmap_image_instance (ii, 1, type);
  c = gdk_cursor_new (resource_name_to_resource (resource_id, type));
  IMAGE_INSTANCE_GTK_CURSOR (ii) = c;
  IMAGE_INSTANCE_PIXMAP_FILENAME (ii) = resource_id;
  IMAGE_INSTANCE_PIXMAP_WIDTH (ii) = 10;
  IMAGE_INSTANCE_PIXMAP_HEIGHT (ii) = 10;
  IMAGE_INSTANCE_PIXMAP_DEPTH (ii) = 1;
}

static void
check_valid_resource_symbol (Lisp_Object data)
{
  CHECK_SYMBOL (data);
  if (!resource_symbol_to_type (data))
    signal_simple_error ("invalid resource type", data);
}

static void
check_valid_resource_id (Lisp_Object data)
{
  if (!resource_name_to_resource (data, IMAGE_POINTER)
      &&
      !resource_name_to_resource (data, IMAGE_COLOR_PIXMAP)
#if 0
      &&
      !resource_name_to_resource (data, IMAGE_BITMAP)
#endif
      )
    signal_simple_error ("invalid resource identifier", data);
}

#if 0
void
check_valid_string_or_int (Lisp_Object data)
{
  if (!INTP (data))
    CHECK_STRING (data);
  else
    CHECK_INT (data);
}
#endif


/**********************************************************************
 *                 Autodetect                                *
 **********************************************************************/

static void
autodetect_validate (Lisp_Object instantiator)
{
  data_must_be_present (instantiator);
}

static Lisp_Object
autodetect_normalize (Lisp_Object instantiator,
                  Lisp_Object console_type,
                  Lisp_Object dest_mask)
{
  Lisp_Object file = find_keyword_in_vector (instantiator, Q_data);
  Lisp_Object filename = Qnil;
  Lisp_Object data = Qnil;
  struct gcpro gcpro1, gcpro2, gcpro3;
  Lisp_Object alist = Qnil;

  GCPRO3 (filename, data, alist);

  if (NILP (file)) /* no conversion necessary */
    RETURN_UNGCPRO (instantiator);

  alist = tagged_vector_to_alist (instantiator);

  filename = locate_pixmap_file (file);
  if (!NILP (filename))
    {
      int xhot, yhot;
      /* #### Apparently some versions of XpmReadFileToData, which is
       called by pixmap_to_lisp_data, don't return an error value
       if the given file is not a valid XPM file.  Instead, they
       just seg fault.  It is definitely caused by passing a
       bitmap.  To try and avoid this we check for bitmaps first.  */

      data = bitmap_to_lisp_data (filename, &xhot, &yhot, 1);

      if (!EQ (data, Qt))
      {
        alist = remassq_no_quit (Q_data, alist);
        alist = Fcons (Fcons (Q_file, filename),
                   Fcons (Fcons (Q_data, data), alist));
        if (xhot != -1)
          alist = Fcons (Fcons (Q_hotspot_x, make_int (xhot)),
                     alist);
        if (yhot != -1)
          alist = Fcons (Fcons (Q_hotspot_y, make_int (yhot)),
                     alist);

        alist = xbm_mask_file_munging (alist, filename, Qnil, console_type);

        {
          Lisp_Object result = alist_to_tagged_vector (Qxbm, alist);
          free_alist (alist);
          RETURN_UNGCPRO (result);
        }
      }

#ifdef HAVE_XPM
      data = pixmap_to_lisp_data (filename, 1);

      if (!EQ (data, Qt))
      {
        alist = remassq_no_quit (Q_data, alist);
        alist = Fcons (Fcons (Q_file, filename),
                   Fcons (Fcons (Q_data, data), alist));
        alist = Fcons (Fcons (Q_color_symbols,
                        evaluate_xpm_color_symbols ()),
                   alist);
        {
          Lisp_Object result = alist_to_tagged_vector (Qxpm, alist);
          free_alist (alist);
          RETURN_UNGCPRO (result);
        }
      }
#endif
    }

  /* If we couldn't convert it, just put it back as it is.
     We might try to further frob it later as a cursor-font
     specification. (We can't do that now because we don't know
     what dest-types it's going to be instantiated into.) */
  {
    Lisp_Object result = alist_to_tagged_vector (Qautodetect, alist);
    free_alist (alist);
    RETURN_UNGCPRO (result);
  }
}

static int
autodetect_possible_dest_types (void)
{
  return
    IMAGE_MONO_PIXMAP_MASK  |
    IMAGE_COLOR_PIXMAP_MASK |
    IMAGE_POINTER_MASK      |
    IMAGE_TEXT_MASK;
}

static void
autodetect_instantiate (Lisp_Object image_instance,
                          Lisp_Object instantiator,
                          Lisp_Object pointer_fg,
                          Lisp_Object pointer_bg,
                          int dest_mask, Lisp_Object domain)
{
  Lisp_Object data = find_keyword_in_vector (instantiator, Q_data);
  struct gcpro gcpro1, gcpro2, gcpro3;
  Lisp_Object alist = Qnil;
  Lisp_Object result = Qnil;
  int is_cursor_font = 0;

  GCPRO3 (data, alist, result);

  alist = tagged_vector_to_alist (instantiator);
  if (dest_mask & IMAGE_POINTER_MASK)
    {
      CONST char *name_ext;

      TO_EXTERNAL_FORMAT (LISP_STRING, data,
                    C_STRING_ALLOCA, name_ext,
                    Qfile_name);

      if (cursor_name_to_index (name_ext) != -1)
        {
          result = alist_to_tagged_vector (Qcursor_font, alist);
          is_cursor_font = 1;
        }
    }

  if (!is_cursor_font)
    result = alist_to_tagged_vector (Qstring, alist);
  free_alist (alist);

  if (is_cursor_font)
    cursor_font_instantiate (image_instance, result, pointer_fg,
                       pointer_bg, dest_mask, domain);
  else
    string_instantiate (image_instance, result, pointer_fg,
                  pointer_bg, dest_mask, domain);

  UNGCPRO;
}


/**********************************************************************
 *                              Font                                  *
 **********************************************************************/

static void
font_validate (Lisp_Object instantiator)
{
  data_must_be_present (instantiator);
}

static int
font_possible_dest_types (void)
{
  return IMAGE_POINTER_MASK;
}

static void
font_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
              Lisp_Object pointer_fg, Lisp_Object pointer_bg,
              int dest_mask, Lisp_Object domain)
{
  /* This function can GC */
  Lisp_Object data = find_keyword_in_vector (instantiator, Q_data);
  struct Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
  Lisp_Object device = IMAGE_INSTANCE_DEVICE (ii);
  GdkColor fg, bg;
  GdkFont *source, *mask;
  char source_name[MAXPATHLEN], mask_name[MAXPATHLEN], dummy;
  int source_char, mask_char;
  int count;
  Lisp_Object foreground, background;

  if (!DEVICE_GTK_P (XDEVICE (device)))
    signal_simple_error ("Not a Gtk device", device);

  if (!STRINGP (data) ||
      strncmp ("FONT ", (char *) XSTRING_DATA (data), 5))
    signal_simple_error ("Invalid font-glyph instantiator",
                   instantiator);

  if (!(dest_mask & IMAGE_POINTER_MASK))
    incompatible_image_types (instantiator, dest_mask, IMAGE_POINTER_MASK);

  foreground = find_keyword_in_vector (instantiator, Q_foreground);
  if (NILP (foreground))
    foreground = pointer_fg;
  background = find_keyword_in_vector (instantiator, Q_background);
  if (NILP (background))
    background = pointer_bg;

  generate_cursor_fg_bg (device, &foreground, &background, &fg, &bg);

  count = sscanf ((char *) XSTRING_DATA (data),
              "FONT %s %d %s %d %c",
              source_name, &source_char,
              mask_name, &mask_char, &dummy);
  /* Allow "%s %d %d" as well... */
  if (count == 3 && (1 == sscanf (mask_name, "%d %c", &mask_char, &dummy)))
    count = 4, mask_name[0] = 0;

  if (count != 2 && count != 4)
    signal_simple_error ("invalid cursor specification", data);
  source = gdk_font_load (source_name);
  if (! source)
    signal_simple_error_2 ("couldn't load font",
                     build_string (source_name),
                     data);
  if (count == 2)
    mask = 0;
  else if (!mask_name[0])
    mask = source;
  else
    {
      mask = gdk_font_load (mask_name);
      if (!mask)
      /* continuable */
      Fsignal (Qerror, list3 (build_string ("couldn't load font"),
                        build_string (mask_name), data));
    }
  if (!mask)
    mask_char = 0;

  /* #### call XQueryTextExtents() and check_pointer_sizes() here. */

  gtk_initialize_pixmap_image_instance (ii, 1, IMAGE_POINTER);

  IMAGE_INSTANCE_GTK_CURSOR (ii) = NULL;

#if 0
  /* #### BILL!!! There is no way to call this function from Gdk */
    XCreateGlyphCursor (dpy, source, mask, source_char, mask_char,
                  &fg, &bg);
#endif
  XIMAGE_INSTANCE_PIXMAP_FG (image_instance) = foreground;
  XIMAGE_INSTANCE_PIXMAP_BG (image_instance) = background;

  gdk_font_unref (source);
  if (mask && mask != source) gdk_font_unref (mask);
}


/**********************************************************************
 *                           Cursor-Font                              *
 **********************************************************************/

static void
cursor_font_validate (Lisp_Object instantiator)
{
  data_must_be_present (instantiator);
}

static int
cursor_font_possible_dest_types (void)
{
  return IMAGE_POINTER_MASK;
}

static char *__downcase (const char *name)
{
    char *converted = strdup(name);
    char *work = converted;

    while (*work)
    {
      *work = tolower(*work);
      work++;
    }
    return(converted);
}

/* This is basically the equivalent of XmuCursorNameToIndex */
static gint
cursor_name_to_index (const char *name)
{
    int i;
    static char *the_gdk_cursors[GDK_NUM_GLYPHS];

    if (!the_gdk_cursors[GDK_BASED_ARROW_UP])
    {
      /* Need to initialize the array */
      /* Supposedly since this array is static it should be
           initialized to NULLs for us, but I'm very paranoid. */
      for (i = 0; i < GDK_NUM_GLYPHS; i++)
      {
          the_gdk_cursors[i] = NULL;
      }

#define FROB_CURSOR(x) the_gdk_cursors[GDK_##x] = __downcase(#x)
      FROB_CURSOR(ARROW);                 FROB_CURSOR(BASED_ARROW_DOWN);
      FROB_CURSOR(BASED_ARROW_UP);        FROB_CURSOR(BOAT);
      FROB_CURSOR(BOGOSITY);              FROB_CURSOR(BOTTOM_LEFT_CORNER);
      FROB_CURSOR(BOTTOM_RIGHT_CORNER);   FROB_CURSOR(BOTTOM_SIDE);
      FROB_CURSOR(BOTTOM_TEE);            FROB_CURSOR(BOX_SPIRAL);
      FROB_CURSOR(CENTER_PTR);            FROB_CURSOR(CIRCLE);
      FROB_CURSOR(CLOCK);                 FROB_CURSOR(COFFEE_MUG);
      FROB_CURSOR(CROSS);                 FROB_CURSOR(CROSS_REVERSE);
      FROB_CURSOR(CROSSHAIR);             FROB_CURSOR(DIAMOND_CROSS);
      FROB_CURSOR(DOT);             FROB_CURSOR(DOTBOX);
      FROB_CURSOR(DOUBLE_ARROW);          FROB_CURSOR(DRAFT_LARGE);
      FROB_CURSOR(DRAFT_SMALL);           FROB_CURSOR(DRAPED_BOX);
      FROB_CURSOR(EXCHANGE);              FROB_CURSOR(FLEUR);
      FROB_CURSOR(GOBBLER);               FROB_CURSOR(GUMBY);
      FROB_CURSOR(HAND1);                 FROB_CURSOR(HAND2);
      FROB_CURSOR(HEART);                 FROB_CURSOR(ICON);
      FROB_CURSOR(IRON_CROSS);            FROB_CURSOR(LEFT_PTR);
      FROB_CURSOR(LEFT_SIDE);             FROB_CURSOR(LEFT_TEE);
      FROB_CURSOR(LEFTBUTTON);            FROB_CURSOR(LL_ANGLE);
      FROB_CURSOR(LR_ANGLE);              FROB_CURSOR(MAN);
      FROB_CURSOR(MIDDLEBUTTON);          FROB_CURSOR(MOUSE);
      FROB_CURSOR(PENCIL);                FROB_CURSOR(PIRATE);
      FROB_CURSOR(PLUS);                  FROB_CURSOR(QUESTION_ARROW);
      FROB_CURSOR(RIGHT_PTR);             FROB_CURSOR(RIGHT_SIDE);
      FROB_CURSOR(RIGHT_TEE);             FROB_CURSOR(RIGHTBUTTON);
      FROB_CURSOR(RTL_LOGO);              FROB_CURSOR(SAILBOAT);
      FROB_CURSOR(SB_DOWN_ARROW);         FROB_CURSOR(SB_H_DOUBLE_ARROW);
      FROB_CURSOR(SB_LEFT_ARROW);         FROB_CURSOR(SB_RIGHT_ARROW);
      FROB_CURSOR(SB_UP_ARROW);           FROB_CURSOR(SB_V_DOUBLE_ARROW);
      FROB_CURSOR(SHUTTLE);               FROB_CURSOR(SIZING);
      FROB_CURSOR(SPIDER);                FROB_CURSOR(SPRAYCAN);
      FROB_CURSOR(STAR);                  FROB_CURSOR(TARGET);
      FROB_CURSOR(TCROSS);                FROB_CURSOR(TOP_LEFT_ARROW);
      FROB_CURSOR(TOP_LEFT_CORNER);       FROB_CURSOR(TOP_RIGHT_CORNER);
      FROB_CURSOR(TOP_SIDE);              FROB_CURSOR(TOP_TEE);
      FROB_CURSOR(TREK);                  FROB_CURSOR(UL_ANGLE);
      FROB_CURSOR(UMBRELLA);              FROB_CURSOR(UR_ANGLE);
      FROB_CURSOR(WATCH);                 FROB_CURSOR(XTERM);
      FROB_CURSOR(X_CURSOR);
#undef FROB_CURSOR
    }

    for (i = 0; i < GDK_NUM_GLYPHS; i++)
    {
      if (!the_gdk_cursors[i]) continue;
      if (!strcmp (the_gdk_cursors[i], name))
      {
          return (i);
      }
    }
    return(-1);
}

static void
cursor_font_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
                   Lisp_Object pointer_fg, Lisp_Object pointer_bg,
                   int dest_mask, Lisp_Object domain)
{
  /* This function can GC */
  Lisp_Object data = find_keyword_in_vector (instantiator, Q_data);
  struct Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
  Lisp_Object device = IMAGE_INSTANCE_DEVICE (ii);
  int i;
  CONST char *name_ext;
  Lisp_Object foreground, background;

  if (!DEVICE_GTK_P (XDEVICE (device)))
    signal_simple_error ("Not a Gtk device", device);

  if (!(dest_mask & IMAGE_POINTER_MASK))
    incompatible_image_types (instantiator, dest_mask, IMAGE_POINTER_MASK);

  TO_EXTERNAL_FORMAT (LISP_STRING, data,
                  C_STRING_ALLOCA, name_ext,
                  Qfile_name);

  if ((i = cursor_name_to_index (name_ext)) == -1)
    signal_simple_error ("Unrecognized cursor-font name", data);

  gtk_initialize_pixmap_image_instance (ii, 1, IMAGE_POINTER);
  IMAGE_INSTANCE_GTK_CURSOR (ii) = gdk_cursor_new (i);
  foreground = find_keyword_in_vector (instantiator, Q_foreground);
  if (NILP (foreground))
    foreground = pointer_fg;
  background = find_keyword_in_vector (instantiator, Q_background);
  if (NILP (background))
    background = pointer_bg;
  maybe_recolor_cursor (image_instance, foreground, background);
}

static int
gtk_colorize_image_instance (Lisp_Object image_instance,
                       Lisp_Object foreground, Lisp_Object background);


/************************************************************************/
/*                      subwindow and widget support                      */
/************************************************************************/

/* unmap the image if it is a widget. This is used by redisplay via
   redisplay_unmap_subwindows */
static void
gtk_unmap_subwindow (Lisp_Image_Instance *p)
{
  if (IMAGE_INSTANCE_TYPE (p) == IMAGE_SUBWINDOW)
    {
      /* We don't support subwindows, but we do support widgets... */
      ABORT ();
    }
  else                        /* must be a widget */
    {
      /* Since we are being unmapped we want the enclosing frame to
       get focus. The losing with simple scrolling but is the safest
       thing to do. */
      if (IMAGE_INSTANCE_GTK_CLIPWIDGET (p))
      gtk_widget_unmap (IMAGE_INSTANCE_GTK_CLIPWIDGET (p));
    }
}

/* map the subwindow. This is used by redisplay via
   redisplay_output_subwindow */
static void
gtk_map_subwindow (Lisp_Image_Instance *p, int x, int y,
             struct display_glyph_area* dga)
{
  assert (dga->width > 0 && dga->height > 0);

  if (IMAGE_INSTANCE_TYPE (p) == IMAGE_SUBWINDOW)
    {
      /* No subwindow support... */
      ABORT ();
    }
  else                        /* must be a widget */
    {
      struct frame *f = XFRAME (IMAGE_INSTANCE_FRAME (p));
      GtkWidget *wid = IMAGE_INSTANCE_GTK_CLIPWIDGET (p);
      GtkAllocation a;
      int moving;

      if (!wid) return;

      a.x = x + IMAGE_INSTANCE_GTK_WIDGET_XOFFSET (p);
      a.y = y + IMAGE_INSTANCE_GTK_WIDGET_YOFFSET (p);
      a.width = dga->width;
      a.height = dga->height;

      /* Is the widget cganging position? */
      moving = (a.x != wid->allocation.x) ||
      (a.y != wid->allocation.y);

      if ((a.width  != wid->allocation.width)  ||
        (a.height != wid->allocation.height) ||
        moving)
      {
        gtk_widget_size_allocate (IMAGE_INSTANCE_GTK_CLIPWIDGET (p), &a);
      }

      if (moving)
      {
        guint32 old_flags = GTK_WIDGET_FLAGS (FRAME_GTK_TEXT_WIDGET (f));

        /* GtkFixed widget queues a resize when you add a widget.
        ** But only if it is visible.
        ** losers.
        */
        GTK_WIDGET_FLAGS(FRAME_GTK_TEXT_WIDGET (f)) &= ~GTK_VISIBLE;

        if (IMAGE_INSTANCE_GTK_ALREADY_PUT(p))
          {
            gtk_fixed_move (GTK_FIXED (FRAME_GTK_TEXT_WIDGET (f)),
                        wid,
                        a.x, a.y);
          }
        else
          {
            IMAGE_INSTANCE_GTK_ALREADY_PUT(p) = TRUE;
            gtk_fixed_put (GTK_FIXED (FRAME_GTK_TEXT_WIDGET (f)),
                       wid,
                       a.x, a.y);
          }

        GTK_WIDGET_FLAGS(FRAME_GTK_TEXT_WIDGET (f)) = old_flags;
      }
      else
      {
        if (IMAGE_INSTANCE_GTK_ALREADY_PUT(p))
          {
            /* Do nothing... */
          }
        else
          {
            /* Must make sure we have put the image at least once! */
            IMAGE_INSTANCE_GTK_ALREADY_PUT(p) = TRUE;
            gtk_fixed_put (GTK_FIXED (FRAME_GTK_TEXT_WIDGET (f)),
                       wid,
                       a.x, a.y);
          }
      }

      if (!IMAGE_INSTANCE_SUBWINDOW_DISPLAYEDP (p))
      {
        gtk_widget_map (wid);
      }

      gtk_widget_draw (wid, NULL);
    }
}

/* when you click on a widget you may activate another widget this
   needs to be checked and all appropriate widgets updated */
static void
gtk_redisplay_subwindow (Lisp_Image_Instance *p)
{
  /* Update the subwindow size if necessary. */
  if (IMAGE_INSTANCE_SIZE_CHANGED (p))
    {
#if 0
      XResizeWindow (IMAGE_INSTANCE_X_SUBWINDOW_DISPLAY (p),
                 IMAGE_INSTANCE_X_SUBWINDOW_ID (p),
                 IMAGE_INSTANCE_WIDTH (p),
                 IMAGE_INSTANCE_HEIGHT (p));
#endif
    }
}

/* Update all attributes that have changed. */
static void
gtk_redisplay_widget (Lisp_Image_Instance *p)
{
  /* This function can GC if IN_REDISPLAY is false. */

  if (!IMAGE_INSTANCE_GTK_CLIPWIDGET (p))
    return;

#ifdef HAVE_WIDGETS
  /* First get the items if they have changed since this is a
     structural change. As such it will nuke all added values so we
     need to update most other things after the items have changed.*/
  gtk_widget_show_all (IMAGE_INSTANCE_GTK_CLIPWIDGET (p));
  if (IMAGE_INSTANCE_WIDGET_ITEMS_CHANGED (p))
    {
      Lisp_Object image_instance;

      XSETIMAGE_INSTANCE (image_instance, p);

      /* Need to update GtkArgs that might have changed... */
      /* #### FIXME!!! */
    }
  else
    {
      /* #### FIXME!!! */
      /* No items changed, so do nothing, right? */
    }

  /* Possibly update the colors and font */
  if (IMAGE_INSTANCE_WIDGET_FACE_CHANGED (p)
      ||
      /* #### This is not sufficient because it will not cope with widgets
       that are not currently visible. Once redisplay has done the
       visible ones it will clear this flag so that when new ones
       become visible they will not be updated. */
      XFRAME (IMAGE_INSTANCE_FRAME (p))->faces_changed
      ||
      XFRAME (IMAGE_INSTANCE_FRAME (p))->frame_changed
      ||
      IMAGE_INSTANCE_WIDGET_ITEMS_CHANGED (p))
    {
      /* #### Write this function BILL! */
      update_widget_face (NULL, p, IMAGE_INSTANCE_FRAME (p));
    }

  /* Possibly update the text. */
  if (IMAGE_INSTANCE_TEXT_CHANGED (p))
    {
      char* str;
      Lisp_Object val = IMAGE_INSTANCE_WIDGET_TEXT (p);
      LISP_STRING_TO_EXTERNAL (val, str, Qnative);

      /* #### Need to special case each type of GtkWidget here! */
    }

  /* Possibly update the size. */
  if (IMAGE_INSTANCE_SIZE_CHANGED (p)
      ||
      IMAGE_INSTANCE_WIDGET_ITEMS_CHANGED (p)
      ||
      IMAGE_INSTANCE_TEXT_CHANGED (p))
    {
      GtkRequisition r;
      GtkAllocation a = IMAGE_INSTANCE_GTK_CLIPWIDGET (p)->allocation;

      assert (IMAGE_INSTANCE_GTK_WIDGET_ID (p) &&
            IMAGE_INSTANCE_GTK_CLIPWIDGET (p)) ;

      a.width = r.width = IMAGE_INSTANCE_WIDTH (p);
      a.height = r.height = IMAGE_INSTANCE_HEIGHT (p);

      /* Force the widget's preferred and actual size to what we say it shall
       be. */
      gtk_widget_size_request (IMAGE_INSTANCE_GTK_CLIPWIDGET (p), &r);
      gtk_widget_size_allocate (IMAGE_INSTANCE_GTK_CLIPWIDGET (p), &a);
    }

  /* Adjust offsets within the frame. */
  if (XFRAME (IMAGE_INSTANCE_FRAME (p))->size_changed)
    {
      /* I don't think we need to do anything for Gtk here... */
    }

  /* now modify the widget */
#endif
}

/* instantiate and gtk type subwindow */
static void
gtk_subwindow_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
                     Lisp_Object pointer_fg, Lisp_Object pointer_bg,
                     int dest_mask, Lisp_Object domain)
{
  /* This function can GC */
  Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
  Lisp_Object device = IMAGE_INSTANCE_DEVICE (ii);
  Lisp_Object frame = DOMAIN_FRAME (domain);

  if (!DEVICE_GTK_P (XDEVICE (device)))
    signal_simple_error ("Not a GTK device", device);

  IMAGE_INSTANCE_TYPE (ii) = IMAGE_SUBWINDOW;

  ii->data = xnew_and_zero (struct gtk_subwindow_data);

  /* Create a window for clipping */
  IMAGE_INSTANCE_GTK_CLIPWINDOW (ii) = NULL;

  /* Now put the subwindow inside the clip window. */
  IMAGE_INSTANCE_SUBWINDOW_ID (ii) = (void *) NULL;
}

#ifdef HAVE_WIDGETS

/************************************************************************/
/*                            widgets                            */
/************************************************************************/
static void
update_widget_face (GtkWidget *w, Lisp_Image_Instance *ii,
                Lisp_Object domain)
{
  if (0)
    {
      GtkStyle *style = gtk_widget_get_style (w);
      Lisp_Object pixel = Qnil;
      GdkColor *fcolor, *bcolor;

      style = gtk_style_copy (style);
  
      /* Update the foreground. */
      pixel = FACE_FOREGROUND (IMAGE_INSTANCE_WIDGET_FACE (ii), domain);
      fcolor = COLOR_INSTANCE_GTK_COLOR (XCOLOR_INSTANCE (pixel));

      /* Update the background. */
      pixel = FACE_BACKGROUND (IMAGE_INSTANCE_WIDGET_FACE (ii), domain);
      bcolor = COLOR_INSTANCE_GTK_COLOR (XCOLOR_INSTANCE (pixel));

      /* Update the font */
      /* #### FIXME!!! Need to copy the widgets style, dick with it, and
      ** set the widgets style to the new style...
      */
      gtk_widget_set_style (w, style);

      /* #### Megahack - but its just getting too complicated to do this
       in the right place. */
#if 0
      if (EQ (IMAGE_INSTANCE_WIDGET_TYPE (ii), Qtab_control))
      update_tab_widget_face (wv, ii, domain);
#endif
    }
}

#if 0
static void
update_tab_widget_face (GtkWidget *w, Lisp_Image_Instance *ii,
                  Lisp_Object domain)
{
  if (wv->contents)
    {
      widget_value* val = wv->contents, *cur;

      /* Give each child label the correct foreground color. */
      Lisp_Object pixel = FACE_FOREGROUND
      (IMAGE_INSTANCE_WIDGET_FACE (ii),
       domain);
      XColor fcolor = COLOR_INSTANCE_X_COLOR (XCOLOR_INSTANCE (pixel));
      lw_add_widget_value_arg (val, XtNtabForeground, fcolor.pixel);
      wv->change = VISIBLE_CHANGE;
      val->change = VISIBLE_CHANGE;

      for (cur = val->next; cur; cur = cur->next)
      {
        cur->change = VISIBLE_CHANGE;
        if (cur->value)
          {
            lw_copy_widget_value_args (val, cur);
          }
      }
    }
}
#endif

static Lisp_Object
gtk_widget_instantiate_1 (Lisp_Object image_instance, Lisp_Object instantiator,
                    Lisp_Object pointer_fg, Lisp_Object pointer_bg,
                    Lisp_Object domain)
{
  Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
  Lisp_Object widget = Qnil;
  char *nm = NULL;
  GtkWidget *w = NULL;
  struct gcpro gcpro1;

  IMAGE_INSTANCE_TYPE (ii) = IMAGE_WIDGET;

  if (!NILP (IMAGE_INSTANCE_WIDGET_TEXT (ii)))
    {
      LISP_STRING_TO_EXTERNAL (IMAGE_INSTANCE_WIDGET_TEXT (ii), nm, Qnative);
    }

  ii->data = xnew_and_zero (struct gtk_subwindow_data);

  /* Create a clipping widget */
  IMAGE_INSTANCE_GTK_CLIPWIDGET (ii) = NULL;
  IMAGE_INSTANCE_GTK_ALREADY_PUT(ii) = FALSE;

  /* Create the actual widget */
  GCPRO1 (widget);
  widget = call5 (Qgtk_widget_instantiate_internal,
              image_instance, instantiator,
              pointer_fg, pointer_bg,
              domain);

  if (!NILP (widget))
    {
      CHECK_GTK_OBJECT (widget);
      w = GTK_WIDGET (XGTK_OBJECT (widget)->object);
    }
  else
    {
      stderr_out ("Lisp-level creation of widget failed... falling back\n");
      w = gtk_label_new ("Widget Creation Failed...");
    }

  UNGCPRO;

  IMAGE_INSTANCE_SUBWINDOW_ID (ii) = (void *) w;

  /* #### HACK!!!!  We should make this do the right thing if we
  ** really need a clip widget!
  */
  IMAGE_INSTANCE_GTK_CLIPWIDGET (ii) = w;

  /* The current theme may produce a widget of a different size that what we
     expect so force reconsideration of the widget's size. */
  IMAGE_INSTANCE_LAYOUT_CHANGED (ii) = 1;

  return (Qt);
}

static void
gtk_widget_instantiate (Lisp_Object image_instance, Lisp_Object instantiator,
                  Lisp_Object pointer_fg, Lisp_Object pointer_bg,
                  int dest_mask, Lisp_Object domain)
{
  call_with_suspended_errors ((lisp_fn_t) gtk_widget_instantiate_1,
                        Qnil, Qimage,
                        ERROR_ME_WARN, 5,
                        image_instance, instantiator,
                        pointer_fg,
                        pointer_bg,
                        domain);
}

/* get properties of a control */
static Lisp_Object
gtk_widget_property (Lisp_Object image_instance, Lisp_Object prop)
{
  /* Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance); */

  /* get the text from a control */
  if (EQ (prop, Q_text))
    {
      return Qnil;
    }
  return Qunbound;
}

#define FAKE_GTK_WIDGET_INSTANTIATOR(x)                           \
static void                                           \
gtk_##x##_instantiate (Lisp_Object image_instance,                \
   Lisp_Object instantiator,                                \
   Lisp_Object pointer_fg,                                  \
   Lisp_Object pointer_bg,                                  \
   int dest_mask, Lisp_Object domain)                             \
{                                                     \
  gtk_widget_instantiate (image_instance, instantiator, pointer_fg,     \
                    pointer_bg, dest_mask, domain);         \
}

FAKE_GTK_WIDGET_INSTANTIATOR(native_layout);
FAKE_GTK_WIDGET_INSTANTIATOR(button);
FAKE_GTK_WIDGET_INSTANTIATOR(progress_gauge);
FAKE_GTK_WIDGET_INSTANTIATOR(edit_field);
FAKE_GTK_WIDGET_INSTANTIATOR(combo_box);
FAKE_GTK_WIDGET_INSTANTIATOR(label);
/* Note: tab_control has a custom instantiator (see below) */

/*
  Ask the widget to return it's preferred size.  This device method must
  defined for all widgets that also have format specific version of
  query_geometry defined in glyphs-widget.c.  This is because those format
  specific versions return sizes that are appropriate for the X widgets.  For
  GTK, the size of a widget can change at runtime due to the user changing
  their theme.

  This method can be called before the widget is instantiated.  This is
  because instantiate_image_instantiator() is tying to be helpful to other
  toolkits and supply sane geometry values to them.  This is not appropriate
  for GTK and can be ignored.

  This method can be used by all widgets.
*/
static void
gtk_widget_query_geometry (Lisp_Object image_instance,
                     int* width, int* height,
                     enum image_instance_geometry disp, Lisp_Object domain)
{
  Lisp_Image_Instance *p = XIMAGE_INSTANCE (image_instance);

  if (p->data != NULL)
    {
      GtkWidget *w = IMAGE_INSTANCE_GTK_CLIPWIDGET (p);
      GtkRequisition r;

      gtk_widget_size_request(w, &r);
      *height= r.height;
      *width = r.width;
    }
}


/* Button functions. */

/* Update a button's clicked state. */
static void
gtk_button_redisplay (Lisp_Object image_instance)
{
  /* This function can GC if IN_REDISPLAY is false. */
  Lisp_Image_Instance *p = XIMAGE_INSTANCE (image_instance);
  GtkWidget *w = IMAGE_INSTANCE_GTK_CLIPWIDGET (p);

  if (GTK_WIDGET_TYPE (w) == gtk_button_get_type ())
    {
    }
  else if (GTK_WIDGET_TYPE (w) == gtk_check_button_get_type ())
    {
    }
  else if (GTK_WIDGET_TYPE (w) == gtk_radio_button_get_type ())
    {
    }
  else
    {
      /* Unknown button type... */
      ABORT();
    }
}

/* get properties of a button */
static Lisp_Object
gtk_button_property (Lisp_Object image_instance, Lisp_Object prop)
{
  Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);

  /* check the state of a button */
  if (EQ (prop, Q_selected))
    {
      if (GTK_WIDGET_HAS_FOCUS (IMAGE_INSTANCE_SUBWINDOW_ID (ii)))
      return Qt;
      else
      return Qnil;
    }
  return Qunbound;
}


/* Progress gauge functions. */

/* set the properties of a progress gauge */
static void
gtk_progress_gauge_redisplay (Lisp_Object image_instance)
{
  Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);

  if (IMAGE_INSTANCE_WIDGET_ITEMS_CHANGED (ii))
    {
      gfloat f;
      Lisp_Object val;

      val = XGUI_ITEM (IMAGE_INSTANCE_WIDGET_PENDING_ITEMS (ii))->value;
      f = XFLOATINT (val);

      gtk_progress_set_value (GTK_PROGRESS (IMAGE_INSTANCE_SUBWINDOW_ID (ii)),
                        f);
    }
}


/* Tab Control functions. */

/*
  Register a widget's callbacks with the frame's hashtable.  The hashtable is
  weak so deregistration is handled automatically.  Tab controls have per-tab
  callback list functions and the GTK callback architecture is not
  sufficiently flexible to deal with this.  Instead, the functions are
  registered here and the id is passed through the callback loop.
 */
static int
gtk_register_gui_item (Lisp_Object image_instance, Lisp_Object gui,
                   Lisp_Object domain)
{
  struct frame *f = XFRAME(DOMAIN_FRAME(domain));
  int id = gui_item_id_hash(FRAME_GTK_WIDGET_CALLBACK_HASH_TABLE(f),
                      gui, WIDGET_GLYPH_SLOT);

  Fputhash(make_int(id), image_instance,
         FRAME_GTK_WIDGET_INSTANCE_HASH_TABLE (f));
  Fputhash(make_int(id), XGUI_ITEM (gui)->callback,
         FRAME_GTK_WIDGET_CALLBACK_HASH_TABLE (f));
  Fputhash(make_int(id), XGUI_ITEM (gui)->callback_ex,
         FRAME_GTK_WIDGET_CALLBACK_EX_HASH_TABLE (f));
  return id;
}

/*
  Append the given item as a tab to the notebook. Callbacks, etc are all
  setup.
 */
static void
gtk_add_tab_item(Lisp_Object image_instance,
             GtkNotebook* nb, Lisp_Object item,
             Lisp_Object domain, int i)
{
  Lisp_Object name;
  int hash_id = 0;
  char *c_name = NULL;
  GtkWidget* box;

  if (GUI_ITEMP (item))
    {
      Lisp_Gui_Item *pgui = XGUI_ITEM (item);

      if (!STRINGP (pgui->name))
      pgui->name = Feval (pgui->name);

      CHECK_STRING (pgui->name);

      hash_id = gtk_register_gui_item (image_instance, item, domain);
      name = pgui->name;
    }
  else
    {
      CHECK_STRING (item);
      name = item;
    }

  TO_EXTERNAL_FORMAT (LISP_STRING, name,
                  C_STRING_ALLOCA, c_name,
                  Qctext);

  /* Dummy widget that the notbook wants to display when a tab is selected. */
  box = gtk_vbox_new (FALSE, 3);

  /*
    Store the per-tab callback data id in the tab.  The callback functions
    themselves could have been stored in the widget but this avoids having to
    worry about the garbage collector running between here and the callback
    function.
  */
  gtk_object_set_data(GTK_OBJECT(box), GTK_DATA_TAB_HASHCODE_IDENTIFIER,
                  (gpointer) hash_id);

  gtk_notebook_append_page (nb, box, gtk_label_new (c_name));
}

/* Signal handler for the switch-page signal. */
static void gtk_tab_control_callback(GtkNotebook *notebook,
                             GtkNotebookPage *page,
                             gint page_num,
                             gpointer user_data)
{
  /*
    This callback is called for every selection, not just user selection.
    We're only interested in user selection, which occurs outside of
    redisplay.
  */

  if (!in_display)
    {
      Lisp_Object image_instance, callback, callback_ex;
      Lisp_Object frame, event;
      int update_subwindows_p = 0;
      struct frame *f = gtk_widget_to_frame(GTK_WIDGET(notebook));
      int id;

      if (!f)
      return;
      frame = wrap_frame (f);

      id             = (int) gtk_object_get_data(GTK_OBJECT(page->child),
                                     GTK_DATA_TAB_HASHCODE_IDENTIFIER);
      image_instance = Fgethash(make_int(id),
                        FRAME_GTK_WIDGET_INSTANCE_HASH_TABLE(f), Qnil);
      callback       = Fgethash(make_int(id),
                        FRAME_GTK_WIDGET_CALLBACK_HASH_TABLE(f), Qnil);
      callback_ex    = Fgethash(make_int(id),
                        FRAME_GTK_WIDGET_CALLBACK_EX_HASH_TABLE(f), Qnil);
      update_subwindows_p = 1;

      /* It is possible for a widget action to cause it to get out of
       sync with its instantiator. Thus it is necessary to signal
       this possibility. */
      if (IMAGE_INSTANCEP (image_instance))
      XIMAGE_INSTANCE_WIDGET_ACTION_OCCURRED (image_instance) = 1;
      
      if (!NILP (callback_ex) && !UNBOUNDP (callback_ex))
      {
        event = Fmake_event (Qnil, Qnil);

        XEVENT (event)->event_type = misc_user_event;
        XEVENT (event)->channel = frame;
        XEVENT (event)->event.eval.function = Qeval;
        XEVENT (event)->event.eval.object =
          list4 (Qfuncall, callback_ex, image_instance, event);
      }
      else if (NILP (callback) || UNBOUNDP (callback))
      event = Qnil;
      else
      {
        Lisp_Object fn, arg;

        event = Fmake_event (Qnil, Qnil);

        get_gui_callback (callback, &fn, &arg);
        XEVENT (event)->event_type = misc_user_event;
        XEVENT (event)->channel = frame;
        XEVENT (event)->event.eval.function = fn;
        XEVENT (event)->event.eval.object = arg;
      }

      if (!NILP (event))
      enqueue_gtk_dispatch_event (event);

      /* The result of this evaluation could cause other instances to change so
       enqueue an update callback to check this. */
      if (update_subwindows_p && !NILP (event))
      enqueue_magic_eval_event (update_widget_instances, frame);
    }
}

/* Create a tab_control widget.  The special handling of the individual tabs
   means that the normal instantiation code cannot be used. */
static void
gtk_tab_control_instantiate (Lisp_Object image_instance,
                       Lisp_Object instantiator,
                       Lisp_Object pointer_fg,
                       Lisp_Object pointer_bg,
                       int dest_mask, Lisp_Object domain)
{
  Lisp_Object rest;
  Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);
  int i = 0;
  int selected = 0;
  GtkNotebook *nb;

  /* The normal instantiation is still needed. */
  gtk_widget_instantiate (image_instance, instantiator, pointer_fg,
                    pointer_bg, dest_mask, domain);

  nb = GTK_NOTEBOOK (IMAGE_INSTANCE_GTK_CLIPWIDGET (ii));

  /* Add items to the tab, find the current selection */
  LIST_LOOP (rest, XCDR (IMAGE_INSTANCE_WIDGET_ITEMS (ii)))
    {
      gtk_add_tab_item (image_instance, nb, XCAR (rest), domain, i);

      if (gui_item_selected_p (XCAR (rest)))
      selected = i;

      i++;
    }

  gtk_notebook_set_page(nb, selected);

  /* Call per-tab lisp callback when a tab is pressed. */
  gtk_signal_connect (GTK_OBJECT (nb), "switch-page",
                  GTK_SIGNAL_FUNC (gtk_tab_control_callback), NULL);
}

/* Set the properties of a tab control */
static void
gtk_tab_control_redisplay (Lisp_Object image_instance)
{
  /* #### Convert this to GTK baby! */
  Lisp_Image_Instance *ii = XIMAGE_INSTANCE (image_instance);

  if (IMAGE_INSTANCE_WIDGET_ITEMS_CHANGED (ii) ||
      IMAGE_INSTANCE_WIDGET_ACTION_OCCURRED (ii))
    {
      /* If only the order has changed then simply select the first
       one of the pending set. This stops horrendous rebuilding -
       and hence flicker - of the tabs each time you click on
       one. */
      if (tab_control_order_only_changed (image_instance))
      {
        int i = 0;
        Lisp_Object rest, selected =
          gui_item_list_find_selected
          (NILP (IMAGE_INSTANCE_WIDGET_PENDING_ITEMS (ii)) ?
           XCDR (IMAGE_INSTANCE_WIDGET_ITEMS (ii)) :
           XCDR (IMAGE_INSTANCE_WIDGET_PENDING_ITEMS (ii)));

        LIST_LOOP (rest, XCDR (IMAGE_INSTANCE_WIDGET_ITEMS (ii)))
          {
            if (gui_item_equal_sans_selected (XCAR (rest), selected, 0))
            {
              Lisp_Object old_selected =gui_item_list_find_selected
                (XCDR (IMAGE_INSTANCE_WIDGET_ITEMS (ii)));

              /* Pick up the new selected item. */
              XGUI_ITEM (old_selected)->selected =
                XGUI_ITEM (XCAR (rest))->selected;
              XGUI_ITEM (XCAR (rest))->selected =
                XGUI_ITEM (selected)->selected;
              /* We're not actually changing the items anymore. */
              IMAGE_INSTANCE_WIDGET_ITEMS_CHANGED (ii) = 0;
              IMAGE_INSTANCE_WIDGET_PENDING_ITEMS (ii) = Qnil;

              gtk_notebook_set_page(GTK_NOTEBOOK (IMAGE_INSTANCE_GTK_CLIPWIDGET (ii)),
                              i);

              break;
            }

            i++;
          }
      }
      else
      {
        /* More than just the order has changed... let's get busy! */
        GtkNotebook *nb = GTK_NOTEBOOK (IMAGE_INSTANCE_GTK_CLIPWIDGET (ii));
        guint num_pages = g_list_length (nb->children);
        Lisp_Object rest;
        int i;

        /* Why is there no API to remove everything from a notebook? */
        if (num_pages >= 0)
          {
            for (i = num_pages; i >= 0; --i)
            {
              gtk_notebook_remove_page (nb, i);
            }
          }

        i = 0;

        LIST_LOOP (rest, XCDR (IMAGE_INSTANCE_WIDGET_PENDING_ITEMS (ii)))
          {
            gtk_add_tab_item(image_instance, nb, XCAR(rest),
                         IMAGE_INSTANCE_FRAME(ii), i);
          }

        /* Show all the new widgets we just added... */
        gtk_widget_show_all (GTK_WIDGET (nb));
      }
    }

  /* Possibly update the face. */
#if 0
  if (IMAGE_INSTANCE_WIDGET_FACE_CHANGED (ii)
      ||
      XFRAME (IMAGE_INSTANCE_FRAME (ii))->faces_changed
      ||
      IMAGE_INSTANCE_WIDGET_ITEMS_CHANGED (ii))
    {
      update_tab_widget_face (wv, ii,
                        IMAGE_INSTANCE_FRAME (ii));
    }
#endif
}
#endif /* HAVE_WIDGETS */


/************************************************************************/
/*                            initialization                            */
/************************************************************************/
void
syms_of_glyphs_gtk (void)
{
  defkeyword (&Q_resource_id, ":resource-id");
  defkeyword (&Q_resource_type, ":resource-type");
#ifdef HAVE_WIDGETS
  defsymbol (&Qgtk_widget_instantiate_internal, "gtk-widget-instantiate-internal");
  defsymbol (&Qgtk_widget_property_internal, "gtk-widget-property-internal");
  defsymbol (&Qgtk_widget_redisplay_internal, "gtk-widget-redisplay-internal");
  defsymbol (&Qgtk_widget_set_style, "gtk-widget-set-style");
#endif
}

void
console_type_create_glyphs_gtk (void)
{
  /* image methods */
  CONSOLE_HAS_METHOD (gtk, print_image_instance);
  CONSOLE_HAS_METHOD (gtk, finalize_image_instance);
  CONSOLE_HAS_METHOD (gtk, image_instance_equal);
  CONSOLE_HAS_METHOD (gtk, image_instance_hash);
  CONSOLE_HAS_METHOD (gtk, colorize_image_instance);
  CONSOLE_HAS_METHOD (gtk, init_image_instance_from_eimage);
  CONSOLE_HAS_METHOD (gtk, locate_pixmap_file);
  CONSOLE_HAS_METHOD (gtk, unmap_subwindow);
  CONSOLE_HAS_METHOD (gtk, map_subwindow);
  CONSOLE_HAS_METHOD (gtk, redisplay_widget);
  CONSOLE_HAS_METHOD (gtk, redisplay_subwindow);
}

void
image_instantiator_format_create_glyphs_gtk (void)
{
  IIFORMAT_VALID_CONSOLE (gtk, nothing);
  IIFORMAT_VALID_CONSOLE (gtk, string);
#ifdef HAVE_WIDGETS
  IIFORMAT_VALID_CONSOLE (gtk, layout);
#endif
  IIFORMAT_VALID_CONSOLE (gtk, formatted_string);
  IIFORMAT_VALID_CONSOLE (gtk, inherit);
#ifdef HAVE_XPM
  INITIALIZE_DEVICE_IIFORMAT (gtk, xpm);
  IIFORMAT_HAS_DEVMETHOD (gtk, xpm, instantiate);
#endif
#ifdef HAVE_JPEG
  IIFORMAT_VALID_CONSOLE (gtk, jpeg);
#endif
#ifdef HAVE_TIFF
  IIFORMAT_VALID_CONSOLE (gtk, tiff);
#endif
#ifdef HAVE_PNG
  IIFORMAT_VALID_CONSOLE (gtk, png);
#endif
#ifdef HAVE_GIF
  IIFORMAT_VALID_CONSOLE (gtk, gif);
#endif

  INITIALIZE_DEVICE_IIFORMAT (gtk, subwindow);
  IIFORMAT_HAS_DEVMETHOD (gtk, subwindow, instantiate);

#ifdef HAVE_WIDGETS
  /* layout widget */
  INITIALIZE_DEVICE_IIFORMAT (gtk, native_layout);
  IIFORMAT_HAS_DEVMETHOD (gtk, native_layout, instantiate);

  /* button widget */
  INITIALIZE_DEVICE_IIFORMAT (gtk, button);
  IIFORMAT_HAS_DEVMETHOD (gtk, button, property);
  IIFORMAT_HAS_DEVMETHOD (gtk, button, instantiate);
  IIFORMAT_HAS_DEVMETHOD (gtk, button, redisplay);
  IIFORMAT_HAS_SHARED_DEVMETHOD (gtk, button, query_geometry, widget);
  /* general widget methods. */
  INITIALIZE_DEVICE_IIFORMAT (gtk, widget);
  IIFORMAT_HAS_DEVMETHOD (gtk, widget, property);
  IIFORMAT_HAS_DEVMETHOD (gtk, widget, query_geometry);

  /* progress gauge */
  INITIALIZE_DEVICE_IIFORMAT (gtk, progress_gauge);
  IIFORMAT_HAS_DEVMETHOD (gtk, progress_gauge, redisplay);
  IIFORMAT_HAS_DEVMETHOD (gtk, progress_gauge, instantiate);
  IIFORMAT_HAS_SHARED_DEVMETHOD (gtk, progress_gauge, query_geometry, widget);
  /* text field */
  INITIALIZE_DEVICE_IIFORMAT (gtk, edit_field);
  IIFORMAT_HAS_DEVMETHOD (gtk, edit_field, instantiate);
  INITIALIZE_DEVICE_IIFORMAT (gtk, combo_box);
  IIFORMAT_HAS_DEVMETHOD (gtk, combo_box, instantiate);
  IIFORMAT_HAS_SHARED_DEVMETHOD (gtk, combo_box, redisplay, tab_control);
  /* tab control widget */
  INITIALIZE_DEVICE_IIFORMAT (gtk, tab_control);
  IIFORMAT_HAS_DEVMETHOD (gtk, tab_control, instantiate);
  IIFORMAT_HAS_DEVMETHOD (gtk, tab_control, redisplay);
  IIFORMAT_HAS_SHARED_DEVMETHOD (gtk, tab_control, query_geometry, widget);
  /* label */
  INITIALIZE_DEVICE_IIFORMAT (gtk, label);
  IIFORMAT_HAS_DEVMETHOD (gtk, label, instantiate);
#endif

  INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (cursor_font, "cursor-font");
  IIFORMAT_VALID_CONSOLE (gtk, cursor_font);

  IIFORMAT_HAS_METHOD (cursor_font, validate);
  IIFORMAT_HAS_METHOD (cursor_font, possible_dest_types);
  IIFORMAT_HAS_METHOD (cursor_font, instantiate);

  IIFORMAT_VALID_KEYWORD (cursor_font, Q_data, check_valid_string);
  IIFORMAT_VALID_KEYWORD (cursor_font, Q_foreground, check_valid_string);
  IIFORMAT_VALID_KEYWORD (cursor_font, Q_background, check_valid_string);

  INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (font, "font");
  IIFORMAT_VALID_CONSOLE (gtk, font);

  IIFORMAT_HAS_METHOD (font, validate);
  IIFORMAT_HAS_METHOD (font, possible_dest_types);
  IIFORMAT_HAS_METHOD (font, instantiate);

  IIFORMAT_VALID_KEYWORD (font, Q_data, check_valid_string);
  IIFORMAT_VALID_KEYWORD (font, Q_foreground, check_valid_string);
  IIFORMAT_VALID_KEYWORD (font, Q_background, check_valid_string);

#ifdef HAVE_XPM
  INITIALIZE_DEVICE_IIFORMAT (gtk, xpm);
  IIFORMAT_HAS_DEVMETHOD (gtk, xpm, instantiate);
#endif

#ifdef HAVE_XFACE
  INITIALIZE_DEVICE_IIFORMAT (gtk, xface);
  IIFORMAT_HAS_DEVMETHOD (gtk, xface, instantiate);
#endif

  INITIALIZE_DEVICE_IIFORMAT (gtk, xbm);
  IIFORMAT_HAS_DEVMETHOD (gtk, xbm, instantiate);
  IIFORMAT_VALID_CONSOLE (gtk, xbm);

  INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (gtk_resource, "gtk-resource");
  IIFORMAT_VALID_CONSOLE (gtk, gtk_resource);

  IIFORMAT_HAS_METHOD (gtk_resource, validate);
  IIFORMAT_HAS_METHOD (gtk_resource, normalize);
  IIFORMAT_HAS_METHOD (gtk_resource, possible_dest_types);
  IIFORMAT_HAS_METHOD (gtk_resource, instantiate);

  IIFORMAT_VALID_KEYWORD (gtk_resource, Q_resource_type, check_valid_resource_symbol);
  IIFORMAT_VALID_KEYWORD (gtk_resource, Q_resource_id, check_valid_resource_id);
  IIFORMAT_VALID_KEYWORD (gtk_resource, Q_file, check_valid_string);

  INITIALIZE_IMAGE_INSTANTIATOR_FORMAT (autodetect, "autodetect");
  IIFORMAT_VALID_CONSOLE (gtk, autodetect);

  IIFORMAT_HAS_METHOD (autodetect, validate);
  IIFORMAT_HAS_METHOD (autodetect, normalize);
  IIFORMAT_HAS_METHOD (autodetect, possible_dest_types);
  IIFORMAT_HAS_METHOD (autodetect, instantiate);

  IIFORMAT_VALID_KEYWORD (autodetect, Q_data, check_valid_string);
}

void
vars_of_glyphs_gtk (void)
{
#ifdef HAVE_XFACE
  Fprovide (Qxface);
#endif

  DEFVAR_LISP ("gtk-bitmap-file-path", &Vgtk_bitmap_file_path /*
A list of the directories in which X bitmap files may be found.
If nil, this is initialized from the "*bitmapFilePath" resource.
This is used by the `make-image-instance' function (however, note that if
the environment variable XBMLANGPATH is set, it is consulted first).
*/ );
  Vgtk_bitmap_file_path = Qnil;
}

void
complex_vars_of_glyphs_gtk (void)
{
#define BUILD_GLYPH_INST(variable, name)              \
  Fadd_spec_to_specifier                              \
    (GLYPH_IMAGE (XGLYPH (variable)),                       \
     vector3 (Qxbm, Q_data,                           \
            list3 (make_int (name##_width),                 \
                 make_int (name##_height),                  \
                 make_ext_string (name##_bits,        \
                              sizeof (name##_bits),   \
                              Qbinary))),       \
     Qglobal, Qgtk, Qnil)

  BUILD_GLYPH_INST (Vtruncation_glyph, truncator);
  BUILD_GLYPH_INST (Vcontinuation_glyph, continuer);
  BUILD_GLYPH_INST (Vxemacs_logo, xemacs);
  BUILD_GLYPH_INST (Vhscroll_glyph, hscroll);

#undef BUILD_GLYPH_INST
}


/* Ripped off from glyphs-msw.c */
/*
 * The data returned by the following routine is always in left-most byte
 * first and left-most bit first.  If it doesn't return BitmapSuccess then
 * its arguments won't have been touched.  This routine should look as much
 * like the Xlib routine XReadBitmapfile as possible.
 */
#define MAX_SIZE 1024

/* shared data for the image read/parse logic */
static short hexTable[256];         /* conversion value */
static int initialized = FALSE;     /* easier to fill in at run time */

/*
 *    Table index for the hex values. Initialized once, first time.
 *    Used for translation value or delimiter significance lookup.
 */
static void initHexTable()
{
    /*
     * We build the table at run time for several reasons:
     *
     *     1.  portable to non-ASCII machines.
     *     2.  still reentrant since we set the init flag after setting table.
     *     3.  easier to extend.
     *     4.  less prone to bugs.
     */
    hexTable['0'] = 0;  hexTable['1'] = 1;
    hexTable['2'] = 2;  hexTable['3'] = 3;
    hexTable['4'] = 4;  hexTable['5'] = 5;
    hexTable['6'] = 6;  hexTable['7'] = 7;
    hexTable['8'] = 8;  hexTable['9'] = 9;
    hexTable['A'] = 10; hexTable['B'] = 11;
    hexTable['C'] = 12; hexTable['D'] = 13;
    hexTable['E'] = 14; hexTable['F'] = 15;
    hexTable['a'] = 10; hexTable['b'] = 11;
    hexTable['c'] = 12; hexTable['d'] = 13;
    hexTable['e'] = 14; hexTable['f'] = 15;

    /* delimiters of significance are flagged w/ negative value */
    hexTable[' '] = -1; hexTable[','] = -1;
    hexTable['}'] = -1; hexTable['\n'] = -1;
    hexTable['\t'] = -1;
      
    initialized = TRUE;
}

/*
 *    read next hex value in the input stream, return -1 if EOF
 */
static int NextInt ( FILE *fstream )
{
    int     ch;
    int     value = 0;
    int gotone = 0;
    int done = 0;
    
    /* loop, accumulate hex value until find delimiter  */
    /* skip any initial delimiters found in read stream */

    while (!done) {
      ch = getc(fstream);
      if (ch == EOF) {
          value   = -1;
          done++;
      } else {
          /* trim high bits, check type and accumulate */
          ch &= 0xff;
          if (isascii(ch) && isxdigit(ch)) {
            value = (value << 4) + hexTable[ch];
            gotone++;
          } else if ((hexTable[ch]) < 0 && gotone)
            done++;
      }
    }
    return value;
}

int read_bitmap_data (fstream, width, height, datap, x_hot, y_hot)
    FILE *fstream;                  /* handle on file  */
    unsigned int *width, *height;   /* RETURNED */
    unsigned char **datap;          /* RETURNED */
    int *x_hot, *y_hot;             /* RETURNED */
{
    unsigned char *data = NULL;           /* working variable */
    char line[MAX_SIZE];            /* input line from file */
    int size;                       /* number of bytes of data */
    char name_and_type[MAX_SIZE];   /* an input line */
    char *type;                     /* for parsing */
    int value;                      /* from an input line */
    int version10p;                 /* boolean, old format */
    int padding;              /* to handle alignment */
    int bytes_per_line;             /* per scanline of data */
    unsigned int ww = 0;            /* width */
    unsigned int hh = 0;            /* height */
    int hx = -1;              /* x hotspot */
    int hy = -1;              /* y hotspot */

#define Xmalloc(size) malloc(size)

    /* first time initialization */
    if (initialized == FALSE) initHexTable();

    /* error cleanup and return macro     */
#define     RETURN(code) { if (data) free (data); return code; }

    while (fgets(line, MAX_SIZE, fstream)) {
      if (strlen(line) == MAX_SIZE-1) {
          RETURN (BitmapFileInvalid);
      }
      if (sscanf(line,"#define %s %d",name_and_type,&value) == 2) {
          if (!(type = strrchr(name_and_type, '_')))
            type = name_and_type;
          else
            type++;

          if (!strcmp("width", type))
            ww = (unsigned int) value;
          if (!strcmp("height", type))
            hh = (unsigned int) value;
          if (!strcmp("hot", type)) {
            if (type-- == name_and_type || type-- == name_and_type)
                continue;
            if (!strcmp("x_hot", type))
                hx = value;
            if (!strcmp("y_hot", type))
                hy = value;
          }
          continue;
      }
    
      if (sscanf(line, "static short %s = {", name_and_type) == 1)
          version10p = 1;
      else if (sscanf(line,"static unsigned char %s = {",name_and_type) == 1)
          version10p = 0;
      else if (sscanf(line, "static char %s = {", name_and_type) == 1)
          version10p = 0;
      else
          continue;

      if (!(type = strrchr(name_and_type, '_')))
          type = name_and_type;
      else
          type++;

      if (strcmp("bits[]", type))
          continue;
    
      if (!ww || !hh)
          RETURN (BitmapFileInvalid);

      if ((ww % 16) && ((ww % 16) < 9) && version10p)
          padding = 1;
      else
          padding = 0;

      bytes_per_line = (ww+7)/8 + padding;

      size = bytes_per_line * hh;
      data = (unsigned char *) Xmalloc ((unsigned int) size);
      if (!data) 
          RETURN (BitmapNoMemory);

      if (version10p) {
          unsigned char *ptr;
          int bytes;

          for (bytes=0, ptr=data; bytes<size; (bytes += 2)) {
            if ((value = NextInt(fstream)) < 0)
                RETURN (BitmapFileInvalid);
            *(ptr++) = value;
            if (!padding || ((bytes+2) % bytes_per_line))
                *(ptr++) = value >> 8;
          }
      } else {
          unsigned char *ptr;
          int bytes;

          for (bytes=0, ptr=data; bytes<size; bytes++, ptr++) {
            if ((value = NextInt(fstream)) < 0) 
                RETURN (BitmapFileInvalid);
            *ptr=value;
          }
      }
      break;
    }                         /* end while */

    if (data == NULL) {
      RETURN (BitmapFileInvalid);
    }

    *datap = data;
    data = NULL;
    *width = ww;
    *height = hh;
    if (x_hot) *x_hot = hx;
    if (y_hot) *y_hot = hy;

    RETURN (BitmapSuccess);
}


int read_bitmap_data_from_file (CONST char *filename, unsigned int *width, 
                        unsigned int *height, unsigned char **datap,
                        int *x_hot, int *y_hot)
{
    FILE *fstream;
    int rval;

    if ((fstream = fopen (filename, "r")) == NULL) {
      return BitmapOpenFailed;
    }
    rval = read_bitmap_data (fstream, width, height, datap, x_hot, y_hot);
    fclose (fstream);
    return rval;
}

/* X specific crap */
#include <gdk/gdkx.h>
/* #### Should remove all this X specific stuff when GTK/GDK matures a
   bit more and provides an abstraction for it. */
static int
gtk_colorize_image_instance (Lisp_Object image_instance,
                       Lisp_Object foreground, Lisp_Object background)
{
  struct Lisp_Image_Instance *p;

  p = XIMAGE_INSTANCE (image_instance);

  switch (IMAGE_INSTANCE_TYPE (p))
    {
    case IMAGE_MONO_PIXMAP:
      IMAGE_INSTANCE_TYPE (p) = IMAGE_COLOR_PIXMAP;
      /* Make sure there aren't two pointers to the same mask, causing
       it to get freed twice. */
      IMAGE_INSTANCE_GTK_MASK (p) = 0;
      break;

    default:
      return 0;
    }

  {
    GdkWindow *draw = GET_GTK_WIDGET_WINDOW (DEVICE_GTK_APP_SHELL (XDEVICE (IMAGE_INSTANCE_DEVICE (p))));
    GdkPixmap *new_pxmp = gdk_pixmap_new (draw,
                                IMAGE_INSTANCE_PIXMAP_WIDTH (p),
                                IMAGE_INSTANCE_PIXMAP_HEIGHT (p),
                                DEVICE_GTK_DEPTH (XDEVICE (IMAGE_INSTANCE_DEVICE (p))));
    GdkGCValues gcv;
    GdkGC *gc;

    gcv.foreground = * COLOR_INSTANCE_GTK_COLOR (XCOLOR_INSTANCE (foreground));
    gcv.background = * COLOR_INSTANCE_GTK_COLOR (XCOLOR_INSTANCE (background));
    gc = gdk_gc_new_with_values (new_pxmp, &gcv, GDK_GC_BACKGROUND | GDK_GC_FOREGROUND);

    XCopyPlane (GDK_WINDOW_XDISPLAY (draw),
            GDK_WINDOW_XWINDOW (IMAGE_INSTANCE_GTK_PIXMAP (p)),
            GDK_WINDOW_XWINDOW (new_pxmp),
            GDK_GC_XGC (gc), 0, 0,
            IMAGE_INSTANCE_PIXMAP_WIDTH (p),
            IMAGE_INSTANCE_PIXMAP_HEIGHT (p),
            0, 0, 1);

    gdk_gc_destroy (gc);
    IMAGE_INSTANCE_GTK_PIXMAP (p) = new_pxmp;
    IMAGE_INSTANCE_PIXMAP_DEPTH (p) = DEVICE_GTK_DEPTH (XDEVICE (IMAGE_INSTANCE_DEVICE (p)));
    IMAGE_INSTANCE_PIXMAP_FG (p) = foreground;
    IMAGE_INSTANCE_PIXMAP_BG (p) = background;
    return 1;
  }
}


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