Temporary Fix #133: switching between images causes window to keep shrinking
[geeqie.git] / src / pixbuf-renderer.c
index c07b278..07de0e7 100644 (file)
@@ -1,13 +1,22 @@
 /*
- * Geeqie
- * (C) 2006 John Ellis
- * Copyright (C) 2008 - 2012 The Geeqie Team
+ * Copyright (C) 2006 John Ellis
+ * Copyright (C) 2008 - 2016 The Geeqie Team
  *
  * Author: John Ellis
  *
- * This software is released under the GNU General Public License (GNU GPL).
- * Please read the included file COPYING for more information.
- * This software comes with no warranty of any kind, use at your own risk!
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  */
 
 #include <stdio.h>
@@ -25,8 +34,6 @@
 
 #include <gtk/gtk.h>
 
-#define RENDERER_NEW(pr) renderer_clutter_new(pr)
-
 /* comment this out if not using this from within Geeqie
  * defining GQ_BUILD does these things:
  *   - Sets the shift-click scroller pixbuf to a nice icon instead of a black box
@@ -98,7 +105,8 @@ enum {
        PROP_WINDOW_LIMIT,
        PROP_WINDOW_LIMIT_VALUE,
        PROP_AUTOFIT_LIMIT,
-       PROP_AUTOFIT_LIMIT_VALUE
+       PROP_AUTOFIT_LIMIT_VALUE,
+       PROP_ENLARGEMENT_LIMIT_VALUE
 };
 
 typedef enum {
@@ -122,12 +130,6 @@ static void pixbuf_renderer_set_property(GObject *object, guint prop_id,
                                         const GValue *value, GParamSpec *pspec);
 static void pixbuf_renderer_get_property(GObject *object, guint prop_id,
                                         GValue *value, GParamSpec *pspec);
-#if GTK_CHECK_VERSION(3,0,0)
-static gboolean pixbuf_renderer_draw(GtkWidget *widget, cairo_t *cr);
-#else
-static gboolean pixbuf_renderer_expose(GtkWidget *widget, GdkEventExpose *event);
-#endif
-
 static void pr_scroller_timer_set(PixbufRenderer *pr, gboolean start);
 
 
@@ -138,7 +140,6 @@ static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
 
 static void pr_signals_connect(PixbufRenderer *pr);
 static void pr_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer data);
-static void pixbuf_renderer_paint(PixbufRenderer *pr, GdkRectangle *area);
 static void pr_stereo_temp_disable(PixbufRenderer *pr, gboolean disable);
 
 
@@ -178,7 +179,6 @@ GType pixbuf_renderer_get_type(void)
 static void pixbuf_renderer_class_init(PixbufRendererClass *class)
 {
        GObjectClass *gobject_class = G_OBJECT_CLASS(class);
-       GtkWidgetClass *widget_class = GTK_WIDGET_CLASS(class);
 
        parent_class = g_type_class_peek_parent(class);
 
@@ -187,12 +187,6 @@ static void pixbuf_renderer_class_init(PixbufRendererClass *class)
 
        gobject_class->finalize = pixbuf_renderer_finalize;
 
-#if GTK_CHECK_VERSION(3,0,0)
-       widget_class->draw = pixbuf_renderer_draw;
-#else
-       widget_class->expose_event = pixbuf_renderer_expose;
-#endif
-
        g_object_class_install_property(gobject_class,
                                        PROP_ZOOM_MIN,
                                        g_param_spec_double("zoom_min",
@@ -336,6 +330,16 @@ static void pixbuf_renderer_class_init(PixbufRendererClass *class)
                                                          100,
                                                          G_PARAM_READABLE | G_PARAM_WRITABLE));
 
+       g_object_class_install_property(gobject_class,
+                                       PROP_ENLARGEMENT_LIMIT_VALUE,
+                                       g_param_spec_uint("enlargement_limit_value",
+                                                         "Size increase limit of image when autofitting",
+                                                         NULL,
+                                                         100,
+                                                         999,
+                                                         500,
+                                                         G_PARAM_READABLE | G_PARAM_WRITABLE));
+
 
        signals[SIGNAL_ZOOM] =
                g_signal_new("zoom",
@@ -384,7 +388,7 @@ static void pixbuf_renderer_class_init(PixbufRendererClass *class)
                             g_cclosure_marshal_VOID__BOXED,
                             G_TYPE_NONE, 1,
                             GDK_TYPE_EVENT);
-                            
+
        signals[SIGNAL_UPDATE_PIXEL] =
                g_signal_new("update-pixel",
                             G_OBJECT_CLASS_TYPE(gobject_class),
@@ -395,6 +399,20 @@ static void pixbuf_renderer_class_init(PixbufRendererClass *class)
                             G_TYPE_NONE, 0);
 }
 
+static RendererFuncs *pr_backend_renderer_new(PixbufRenderer *pr)
+{
+       if (options->image.use_clutter_renderer)
+               {
+#ifdef HAVE_CLUTTER
+               return renderer_clutter_new(pr);
+#else
+               DEBUG_0("Geeqie is built without clutter renderer support");
+#endif
+               }
+       return renderer_tiles_new(pr);
+}
+
+
 static void pixbuf_renderer_init(PixbufRenderer *pr)
 {
        GtkWidget *box;
@@ -414,7 +432,7 @@ static void pixbuf_renderer_init(PixbufRenderer *pr)
 
        pr->scroller_id = 0;
        pr->scroller_overlay = -1;
-       
+
        pr->x_mouse = -1;
        pr->y_mouse = -1;
 
@@ -425,14 +443,19 @@ static void pixbuf_renderer_init(PixbufRenderer *pr)
 
        pr->norm_center_x = 0.5;
        pr->norm_center_y = 0.5;
-       
+
        pr->stereo_mode = PR_STEREO_NONE;
-       
-       pr->renderer = RENDERER_NEW(pr);
-       
+
+       pr->color.red =0;
+       pr->color.green =0;
+       pr->color.blue =0;
+
+       pr->renderer = pr_backend_renderer_new(pr);
+
        pr->renderer2 = NULL;
 
        gtk_widget_set_double_buffered(box, FALSE);
+       gtk_widget_set_app_paintable(box, TRUE);
        g_signal_connect_after(G_OBJECT(box), "size_allocate",
                               G_CALLBACK(pr_size_cb), pr);
 
@@ -518,6 +541,9 @@ static void pixbuf_renderer_set_property(GObject *object, guint prop_id,
                case PROP_AUTOFIT_LIMIT_VALUE:
                        pr->autofit_limit_size = g_value_get_uint(value);
                        break;
+               case PROP_ENLARGEMENT_LIMIT_VALUE:
+                       pr->enlargement_limit_size = g_value_get_uint(value);
+                       break;
                default:
                        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
                        break;
@@ -581,67 +607,15 @@ static void pixbuf_renderer_get_property(GObject *object, guint prop_id,
                case PROP_AUTOFIT_LIMIT_VALUE:
                        g_value_set_uint(value, pr->autofit_limit_size);
                        break;
+               case PROP_ENLARGEMENT_LIMIT_VALUE:
+                       g_value_set_uint(value, pr->enlargement_limit_size);
+                       break;
                default:
                        G_OBJECT_WARN_INVALID_PROPERTY_ID(object, prop_id, pspec);
                        break;
                }
 }
 
-#if GTK_CHECK_VERSION(3,0,0)
-
-static gboolean pixbuf_renderer_draw(GtkWidget *widget, cairo_t *cr)
-{
-       if (gtk_widget_is_drawable(widget))
-               {
-               if (gtk_widget_get_has_window(widget))
-                       {
-                       GdkRectangle area;
-                       if (gdk_cairo_get_clip_rectangle(cr, &area))
-                               {
-                               pixbuf_renderer_paint(PIXBUF_RENDERER(widget), &area);
-                               }
-                       }
-               }
-
-       return FALSE;
-}
-
-#else
-static gboolean pixbuf_renderer_expose(GtkWidget *widget, GdkEventExpose *event)
-{
-#if GTK_CHECK_VERSION(2,20,0)
-       if (gtk_widget_is_drawable(widget))
-#else
-       if (GTK_WIDGET_DRAWABLE(widget))
-#endif
-               {
-#if GTK_CHECK_VERSION(2,20,0)
-               if (gtk_widget_get_has_window(widget))
-#else
-               if (!GTK_WIDGET_NO_WINDOW(widget))
-#endif
-                       {
-                       if (event->window != gtk_widget_get_window(widget))
-                               {
-                               GdkRectangle area;
-
-                               gdk_window_get_position(event->window, &area.x, &area.y);
-                               area.x += event->area.x;
-                               area.y += event->area.y;
-                               area.width = event->area.width;
-                               area.height = event->area.height;
-                               pixbuf_renderer_paint(PIXBUF_RENDERER(widget), &area);
-                               }
-                       else
-                               {
-                               pixbuf_renderer_paint(PIXBUF_RENDERER(widget), &event->area);
-                               }
-                       }
-               }
-
-       return FALSE;
-}
-#endif
 
 /*
  *-------------------------------------------------------------------
@@ -951,26 +925,21 @@ void pixbuf_renderer_set_color(PixbufRenderer *pr, GdkColor *color)
 
        g_return_if_fail(IS_PIXBUF_RENDERER(pr));
 
-       widget = GTK_WIDGET(pr);
-
-       if (color) {
-               GdkColor *slot;
-
-               style = gtk_style_copy(gtk_widget_get_style(widget));
-               slot = &style->bg[GTK_STATE_NORMAL];
-
-               slot->red = color->red;
-               slot->green = color->green;
-               slot->blue = color->blue;
+       if (color)
+               {
+               pr->color.red = color->red;
+               pr->color.green = color->green;
+               pr->color.blue = color->blue;
+               }
+       else
+               {
+               pr->color.red = 0;
+               pr->color.green = 0;
+               pr->color.blue = 0;
                }
-       else {
-               style = gtk_style_copy(gtk_widget_get_default_style());
-       }
-
-       gtk_widget_set_style(widget, style);
 
-       pr->renderer->update_sizes(pr->renderer);
-       if (pr->renderer2) pr->renderer2->update_sizes(pr->renderer2);
+       pr->renderer->update_viewport(pr->renderer);
+       if (pr->renderer2) pr->renderer2->update_viewport(pr->renderer2);
 }
 
 /*
@@ -1216,7 +1185,7 @@ void pixbuf_renderer_set_tiles(PixbufRenderer *pr, gint width, gint height,
                               gdouble zoom)
 {
        g_return_if_fail(IS_PIXBUF_RENDERER(pr));
-       g_return_if_fail(tile_width >= 32 && tile_width >= 32);
+       g_return_if_fail(tile_width >= 32 && tile_height >= 32);
        g_return_if_fail(width >= 32 && height > 32);
        g_return_if_fail(func_request != NULL);
 
@@ -1239,6 +1208,7 @@ void pixbuf_renderer_set_tiles(PixbufRenderer *pr, gint width, gint height,
        pr->func_tile_dispose = func_dispose;
        pr->func_tile_data = user_data;
 
+       pr_stereo_temp_disable(pr, TRUE);
        pr_zoom_sync(pr, zoom, PR_ZOOM_FORCE | PR_ZOOM_NEW, 0, 0);
 }
 
@@ -1317,9 +1287,6 @@ static void pr_zoom_adjust_real(PixbufRenderer *pr, gdouble increment,
 
 static void pr_update_signal(PixbufRenderer *pr)
 {
-#if 0
-       log_printf("FIXME: send updated signal\n");
-#endif
        DEBUG_1("%s pixbuf renderer updated - started drawing %p, img: %dx%d", get_exec_time(), pr, pr->image_width, pr->image_height);
        pr->debug_updated = TRUE;
 }
@@ -1353,9 +1320,9 @@ void pr_render_complete_signal(PixbufRenderer *pr)
                }
 }
 
-static void pr_drag_signal(PixbufRenderer *pr, GdkEventButton *bevent)
+static void pr_drag_signal(PixbufRenderer *pr, GdkEventMotion *event)
 {
-       g_signal_emit(pr, signals[SIGNAL_DRAG], 0, bevent);
+       g_signal_emit(pr, signals[SIGNAL_DRAG], 0, event);
 }
 
 static void pr_update_pixel_signal(PixbufRenderer *pr)
@@ -1553,7 +1520,7 @@ static void pixbuf_renderer_sync_scroll_center(PixbufRenderer *pr)
        gint src_x, src_y;
        if (!pr->width || !pr->height) return;
 
-       /* 
+       /*
         * Update norm_center only if the image is bigger than the window.
         * With this condition the stored center survives also a temporary display
         * of the "broken image" icon.
@@ -1564,7 +1531,7 @@ static void pixbuf_renderer_sync_scroll_center(PixbufRenderer *pr)
                src_x = pr->x_scroll + pr->vis_width / 2;
                pr->norm_center_x = (gdouble)src_x / pr->width;
                }
-       
+
        if (pr->height > pr->viewport_height)
                {
                src_y = pr->y_scroll + pr->vis_height / 2;
@@ -1647,15 +1614,12 @@ static gboolean pr_size_clamp(PixbufRenderer *pr)
 }
 
 static gboolean pr_zoom_clamp(PixbufRenderer *pr, gdouble zoom,
-                             PrZoomFlags flags, gboolean *redrawn)
+                             PrZoomFlags flags)
 {
        gint w, h;
        gdouble scale;
-       gboolean invalid;
        gboolean force = !!(flags & PR_ZOOM_FORCE);
        gboolean new = !!(flags & PR_ZOOM_NEW);
-       gboolean invalidate = !!(flags & PR_ZOOM_INVALIDATE);
-       gboolean lazy = !!(flags & PR_ZOOM_LAZY);
 
        zoom = CLAMP(zoom, pr->zoom_min, pr->zoom_max);
 
@@ -1718,6 +1682,17 @@ static gboolean pr_zoom_clamp(PixbufRenderer *pr, gdouble zoom,
                                scale = scale * factor;
                                }
 
+                       if (pr->zoom_expand)
+                               {
+                               gdouble factor = (gdouble)pr->enlargement_limit_size / 100;
+                               if (scale > factor)
+                                       {
+                                       w = w * factor / scale;
+                                       h = h * factor / scale;
+                                       scale = factor;
+                                       }
+                               }
+
                        if (w < 1) w = 1;
                        if (h < 1) h = 1;
                        }
@@ -1739,23 +1714,11 @@ static gboolean pr_zoom_clamp(PixbufRenderer *pr, gdouble zoom,
                h = h * scale * pr->aspect_ratio;
                }
 
-       invalid = (pr->width != w || pr->height != h);
-
        pr->zoom = zoom;
        pr->width = w;
        pr->height = h;
        pr->scale = scale;
 
-       if (invalidate || invalid)
-               {
-               pr->renderer->update_zoom(pr->renderer, lazy);
-               if (pr->renderer2) pr->renderer2->update_zoom(pr->renderer2, lazy);
-//             if (!lazy) pr_redraw(pr, TRUE);
-               }
-       if (redrawn) *redrawn = (invalidate || invalid);
-
-       pixbuf_renderer_sync_scroll_center(pr);
-
        return TRUE;
 }
 
@@ -1764,9 +1727,6 @@ static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
 {
        gdouble old_scale;
        gint old_cx, old_cy;
-       gboolean clamped;
-       gboolean sized;
-       gboolean redrawn = FALSE;
        gboolean center_point = !!(flags & PR_ZOOM_CENTER);
        gboolean force = !!(flags & PR_ZOOM_FORCE);
        gboolean new = !!(flags & PR_ZOOM_NEW);
@@ -1774,7 +1734,7 @@ static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
        PrZoomFlags clamp_flags = flags;
        gdouble old_center_x = pr->norm_center_x;
        gdouble old_center_y = pr->norm_center_y;
-       
+
        old_scale = pr->scale;
        if (center_point)
                {
@@ -1791,11 +1751,10 @@ static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
                }
 
        if (force) clamp_flags |= PR_ZOOM_INVALIDATE;
-       if (lazy) clamp_flags |= PR_ZOOM_LAZY;
-       if (!pr_zoom_clamp(pr, zoom, clamp_flags, &redrawn)) return;
+       (void) pr_parent_window_resize(pr, pr->width, pr->height);
+       if (!pr_zoom_clamp(pr, zoom, clamp_flags)) return;
 
-       clamped = pr_size_clamp(pr);
-       sized = pr_parent_window_resize(pr, pr->width, pr->height);
+       (void) pr_size_clamp(pr);
 
        if (force && new)
                {
@@ -1836,17 +1795,6 @@ static void pr_zoom_sync(PixbufRenderer *pr, gdouble zoom,
 
        pr_scroll_clamp(pr);
 
-#if 0  
-       if (lazy)
-               {
-               pr->renderer->queue_clear(pr->renderer);
-               if (pr->renderer2) pr->renderer2->queue_clear(pr->renderer2);
-               }
-       else
-               {
-               pr_redraw(pr, redrawn);
-               }
-#endif
        pr->renderer->update_zoom(pr->renderer, lazy);
        if (pr->renderer2) pr->renderer2->update_zoom(pr->renderer2, lazy);
 
@@ -1878,7 +1826,7 @@ static void pr_size_sync(PixbufRenderer *pr, gint new_width, gint new_height)
                        new_viewport_height = pr->stereo_fixed_height;
                        }
                }
-               
+
        if (pr->window_width == new_width && pr->window_height == new_height &&
            pr->viewport_width == new_viewport_width && pr->viewport_height == new_viewport_height) return;
 
@@ -1890,15 +1838,22 @@ static void pr_size_sync(PixbufRenderer *pr, gint new_width, gint new_height)
        if (pr->zoom == 0.0)
                {
                gdouble old_scale = pr->scale;
-               pr_zoom_clamp(pr, 0.0, PR_ZOOM_FORCE, NULL);
+               pr_zoom_clamp(pr, 0.0, PR_ZOOM_FORCE);
                zoom_changed = (old_scale != pr->scale);
                }
 
        pr_size_clamp(pr);
        pr_scroll_clamp(pr);
 
-       pr->renderer->update_sizes(pr->renderer);
-       if (pr->renderer2) pr->renderer2->update_sizes(pr->renderer2);
+       if (zoom_changed)
+               {
+               pr->renderer->update_zoom(pr->renderer, FALSE);
+               if (pr->renderer2) pr->renderer2->update_zoom(pr->renderer2, FALSE);
+               }
+
+       pr->renderer->update_viewport(pr->renderer);
+       if (pr->renderer2) pr->renderer2->update_viewport(pr->renderer2);
+
 
        /* ensure scroller remains visible */
        if (pr->scroller_overlay != -1)
@@ -1946,19 +1901,6 @@ static void pr_size_cb(GtkWidget *widget, GtkAllocation *allocation, gpointer da
        pr_size_sync(pr, allocation->width, allocation->height);
 }
 
-static void pixbuf_renderer_paint(PixbufRenderer *pr, GdkRectangle *area)
-{
-       gint x, y;
-
-       pr->renderer->redraw(pr->renderer, area->x, area->y, area->width, area->height,
-                             FALSE, TILE_RENDER_ALL, FALSE, FALSE);
-       if (pr->renderer2) 
-               {
-               pr->renderer2->redraw(pr->renderer2, area->x, area->y, area->width, area->height,
-                             FALSE, TILE_RENDER_ALL, FALSE, FALSE);
-               }
-}
-
 /*
  *-------------------------------------------------------------------
  * scrolling
@@ -1981,16 +1923,16 @@ void pixbuf_renderer_scroll(PixbufRenderer *pr, gint x, gint y)
        pr->y_scroll += y;
 
        pr_scroll_clamp(pr);
-       
+
        pixbuf_renderer_sync_scroll_center(pr);
-       
+
        if (pr->x_scroll == old_x && pr->y_scroll == old_y) return;
 
        pr_scroll_notify_signal(pr);
 
        x_off = pr->x_scroll - old_x;
        y_off = pr->y_scroll - old_y;
-       
+
        pr->renderer->scroll(pr->renderer, x_off, y_off);
        if (pr->renderer2) pr->renderer2->scroll(pr->renderer2, x_off, y_off);
 }
@@ -2040,30 +1982,40 @@ void pixbuf_renderer_set_scroll_center(PixbufRenderer *pr, gdouble x, gdouble y)
  *-------------------------------------------------------------------
  */
 
-static gboolean pr_mouse_motion_cb(GtkWidget *widget, GdkEventButton *bevent, gpointer data)
+static gboolean pr_mouse_motion_cb(GtkWidget *widget, GdkEventMotion *event, gpointer data)
 {
        PixbufRenderer *pr;
        gint accel;
+#if GTK_CHECK_VERSION(3,0,0)
+       GdkDeviceManager *device_manager;
+       GdkDevice *device;
+#endif
 
        /* This is a hack, but work far the best, at least for single pointer systems.
         * See http://bugzilla.gnome.org/show_bug.cgi?id=587714 for more. */
        gint x, y;
-       gdk_window_get_pointer (bevent->window, &x, &y, NULL);
-       bevent->x = x;
-       bevent->y = y;
+#if GTK_CHECK_VERSION(3,0,0)
+       device_manager = gdk_display_get_device_manager(gdk_window_get_display(event->window));
+       device = gdk_device_manager_get_client_pointer(device_manager);
+       gdk_window_get_device_position(event->window, device, &x, &y, NULL);
+#else
+       gdk_window_get_pointer (event->window, &x, &y, NULL);
+#endif
+       event->x = x;
+       event->y = y;
 
        pr = PIXBUF_RENDERER(widget);
 
        if (pr->scroller_id)
                {
-               pr->scroller_xpos = bevent->x;
-               pr->scroller_ypos = bevent->y;
+               pr->scroller_xpos = event->x;
+               pr->scroller_ypos = event->y;
                }
-       
-       pr->x_mouse = bevent->x;
-       pr->y_mouse = bevent->y;
+
+       pr->x_mouse = event->x;
+       pr->y_mouse = event->y;
        pr_update_pixel_signal(pr);
-       
+
        if (!pr->in_drag || !gdk_pointer_is_grabbed()) return FALSE;
 
        if (pr->drag_moved < PR_DRAG_SCROLL_THRESHHOLD)
@@ -2075,7 +2027,7 @@ static gboolean pr_mouse_motion_cb(GtkWidget *widget, GdkEventButton *bevent, gp
                widget_set_cursor(widget, GDK_FLEUR);
                }
 
-       if (bevent->state & GDK_CONTROL_MASK)
+       if (event->state & GDK_CONTROL_MASK)
                {
                accel = PR_PAN_SHIFT_MULTIPLIER;
                }
@@ -2085,19 +2037,19 @@ static gboolean pr_mouse_motion_cb(GtkWidget *widget, GdkEventButton *bevent, gp
                }
 
        /* do the scroll */
-       pixbuf_renderer_scroll(pr, (pr->drag_last_x - bevent->x) * accel,
-                              (pr->drag_last_y - bevent->y) * accel);
+       pixbuf_renderer_scroll(pr, (pr->drag_last_x - event->x) * accel,
+                              (pr->drag_last_y - event->y) * accel);
 
-       pr_drag_signal(pr, bevent);
+       pr_drag_signal(pr, event);
 
-       pr->drag_last_x = bevent->x;
-       pr->drag_last_y = bevent->y;
+       pr->drag_last_x = event->x;
+       pr->drag_last_y = event->y;
 
        /* This is recommended by the GTK+ documentation, but does not work properly.
         * Use deprecated way until GTK+ gets a solution for correct motion hint handling:
         * http://bugzilla.gnome.org/show_bug.cgi?id=587714
         */
-       /* gdk_event_request_motions (bevent); */
+       /* gdk_event_request_motions (event); */
        return FALSE;
 }
 
@@ -2145,11 +2097,7 @@ static gboolean pr_mouse_press_cb(GtkWidget *widget, GdkEventButton *bevent, gpo
                }
 
        parent = gtk_widget_get_parent(widget);
-#if GTK_CHECK_VERSION(2,20,0)
        if (widget && gtk_widget_get_can_focus(parent))
-#else
-       if (widget && GTK_WIDGET_CAN_FOCUS(parent))
-#endif
                {
                gtk_widget_grab_focus(parent);
                }
@@ -2169,11 +2117,7 @@ static gboolean pr_mouse_release_cb(GtkWidget *widget, GdkEventButton *bevent, g
                return TRUE;
                }
 
-#if GTK_CHECK_VERSION(2,20,0)
        if (gdk_pointer_is_grabbed() && gtk_widget_has_grab(GTK_WIDGET(pr)))
-#else
-       if (gdk_pointer_is_grabbed() && GTK_WIDGET_HAS_GRAB(pr))
-#endif
                {
                gtk_grab_remove(widget);
                gdk_pointer_ungrab(bevent->time);
@@ -2237,7 +2181,7 @@ static void pr_signals_connect(PixbufRenderer *pr)
                         G_CALLBACK(pr_leave_notify_cb), pr);
 
        gtk_widget_set_events(GTK_WIDGET(pr), GDK_POINTER_MOTION_MASK | GDK_POINTER_MOTION_HINT_MASK |
-                                             GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK |
+                                             GDK_BUTTON_RELEASE_MASK | GDK_BUTTON_PRESS_MASK | GDK_SCROLL_MASK |
                                              GDK_LEAVE_NOTIFY_MASK);
 
        g_signal_connect(G_OBJECT(pr), "drag_begin",
@@ -2252,7 +2196,11 @@ static void pr_signals_connect(PixbufRenderer *pr)
  */
 
 #define COLOR_BYTES 3   /* rgb */
-static void pr_create_anaglyph_RC(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h)
+#define RC 0            /* Red-Cyan */
+#define GM 1            /* Green-Magenta */
+#define YB 2            /* Yellow-Blue */
+
+static void pr_create_anaglyph_color(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h, guint mode)
 {
        gint srs, drs;
        guchar *s_pix, *d_pix;
@@ -2274,14 +2222,26 @@ static void pr_create_anaglyph_RC(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, g
                dp = dpi + (i * drs);
                for (j = 0; j < w; j++)
                        {
-                       *dp = *sp; /* copy red channel */
+                       switch(mode)
+                               {
+                               case RC:
+                                       dp[0] = sp[0]; /* copy red channel */
+                                       break;
+                               case GM:
+                                       dp[1] = sp[1];
+                                       break;
+                               case YB:
+                                       dp[0] = sp[0];
+                                       dp[1] = sp[1];
+                                       break;
+                               }
                        sp += COLOR_BYTES;
                        dp += COLOR_BYTES;
                        }
                }
 }
 
-static void pr_create_anaglyph_gray(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h)
+static void pr_create_anaglyph_gray(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h, guint mode)
 {
        gint srs, drs;
        guchar *s_pix, *d_pix;
@@ -2306,28 +2266,63 @@ static void pr_create_anaglyph_gray(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x,
                        {
                        guchar g1 = dp[0] * gc[0] + dp[1] * gc[1] + dp[2] * gc[2];
                        guchar g2 = sp[0] * gc[0] + sp[1] * gc[1] + sp[2] * gc[2];
-                       dp[0] = g2; /* red channel from sp */
-                       dp[1] = g1; /* green and blue from dp */
-                       dp[2] = g1;
+                       switch(mode)
+                               {
+                               case RC:
+                                       dp[0] = g2; /* red channel from sp */
+                                       dp[1] = g1; /* green and blue from dp */
+                                       dp[2] = g1;
+                                       break;
+                               case GM:
+                                       dp[0] = g1;
+                                       dp[1] = g2;
+                                       dp[2] = g1;
+                                       break;
+                               case YB:
+                                       dp[0] = g2;
+                                       dp[1] = g2;
+                                       dp[2] = g1;
+                                       break;
+                               }
                        sp += COLOR_BYTES;
                        dp += COLOR_BYTES;
                        }
                }
 }
 
-const double pr_dubois_matrix[3][6] = {
-       { 0.456,  0.500,  0.176, -0.043, -0.088, -0.002},
-       {-0.040, -0.038, -0.016,  0.378,  0.734, -0.018},
-       {-0.015, -0.021, -0.005, -0.072, -0.113,  1.226}
-       }; 
-
-static void pr_create_anaglyph_dubois(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h)
+static void pr_create_anaglyph_dubois(GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h, guint mode)
 {
        gint srs, drs;
        guchar *s_pix, *d_pix;
        guchar *sp, *dp;
        guchar *spi, *dpi;
        gint i, j, k;
+       double pr_dubois_matrix[3][6];
+       const static double pr_dubois_matrix_RC[3][6] = {
+               { 0.456,  0.500,  0.176, -0.043, -0.088, -0.002},
+               {-0.040, -0.038, -0.016,  0.378,  0.734, -0.018},
+               {-0.015, -0.021, -0.005, -0.072, -0.113,  1.226}};
+       const static double pr_dubois_matrix_GM[3][6] = {
+               {-0.062, -0.158, -0.039,  0.529,  0.705,  0.024},
+               { 0.284,  0.668,  0.143, -0.016, -0.015, -0.065},
+               {-0.015, -0.027,  0.021,  0.009,  0.075,  0.937}};
+       const static double pr_dubois_matrix_YB[3][6] = {
+               { 1.000, -0.193,  0.282, -0.015, -0.116, -0.016},
+               {-0.024,  0.855,  0.064,  0.006,  0.058, -0.016},
+               {-0.036, -0.163,  0.021,  0.089,  0.174,  0.858}};
+
+       switch(mode)
+               {
+               case RC:
+                       memcpy(pr_dubois_matrix, pr_dubois_matrix_RC, sizeof pr_dubois_matrix);
+                       break;
+               case GM:
+                       memcpy(pr_dubois_matrix, pr_dubois_matrix_GM, sizeof pr_dubois_matrix);
+                       break;
+               case YB:
+                       memcpy(pr_dubois_matrix, pr_dubois_matrix_YB, sizeof pr_dubois_matrix);
+                       break;
+               }
 
        srs = gdk_pixbuf_get_rowstride(right);
        s_pix = gdk_pixbuf_get_pixels(right);
@@ -2344,7 +2339,7 @@ static void pr_create_anaglyph_dubois(GdkPixbuf *pixbuf, GdkPixbuf *right, gint
                for (j = 0; j < w; j++)
                        {
                        double res[3];
-                       for (k = 0; k < 3; k++) 
+                       for (k = 0; k < 3; k++)
                                {
                                const double *m = pr_dubois_matrix[k];
                                res[k] = sp[0] * m[0] + sp[1] * m[1] + sp[2] * m[2] + dp[0] * m[3] + dp[1] * m[4] + dp[2] * m[5];
@@ -2359,15 +2354,27 @@ static void pr_create_anaglyph_dubois(GdkPixbuf *pixbuf, GdkPixbuf *right, gint
                        }
                }
 }
+
 void pr_create_anaglyph(guint mode, GdkPixbuf *pixbuf, GdkPixbuf *right, gint x, gint y, gint w, gint h)
 {
        if (mode & PR_STEREO_ANAGLYPH_RC)
-               pr_create_anaglyph_RC(pixbuf, right, x, y, w, h);
-       else if (mode & PR_STEREO_ANAGLYPH_GRAY)
-               pr_create_anaglyph_gray(pixbuf, right, x, y, w, h);
-       else if (mode & PR_STEREO_ANAGLYPH_DB)
-               pr_create_anaglyph_dubois(pixbuf, right, x, y, w, h);
+               pr_create_anaglyph_color(pixbuf, right, x, y, w, h, RC);
+       else if (mode & PR_STEREO_ANAGLYPH_GM)
+               pr_create_anaglyph_color(pixbuf, right, x, y, w, h, GM);
+       else if (mode & PR_STEREO_ANAGLYPH_YB)
+               pr_create_anaglyph_color(pixbuf, right, x, y, w, h, YB);
+       else if (mode & PR_STEREO_ANAGLYPH_GRAY_RC)
+               pr_create_anaglyph_gray(pixbuf, right, x, y, w, h, RC);
+       else if (mode & PR_STEREO_ANAGLYPH_GRAY_GM)
+               pr_create_anaglyph_gray(pixbuf, right, x, y, w, h, GM);
+       else if (mode & PR_STEREO_ANAGLYPH_GRAY_YB)
+               pr_create_anaglyph_gray(pixbuf, right, x, y, w, h, YB);
+       else if (mode & PR_STEREO_ANAGLYPH_DB_RC)
+               pr_create_anaglyph_dubois(pixbuf, right, x, y, w, h, RC);
+       else if (mode & PR_STEREO_ANAGLYPH_DB_GM)
+               pr_create_anaglyph_dubois(pixbuf, right, x, y, w, h, GM);
+       else if (mode & PR_STEREO_ANAGLYPH_DB_YB)
+               pr_create_anaglyph_dubois(pixbuf, right, x, y, w, h, YB);
 }
 
 /*
@@ -2388,27 +2395,27 @@ static void pr_pixbuf_size_sync(PixbufRenderer *pr)
                case EXIF_ORIENTATION_LEFT_BOTTOM:
                        pr->image_width = gdk_pixbuf_get_height(pr->pixbuf);
                        pr->image_height = gdk_pixbuf_get_width(pr->pixbuf);
-                       if (pr->stereo_data == STEREO_PIXBUF_SBS) 
+                       if (pr->stereo_data == STEREO_PIXBUF_SBS)
                                {
                                pr->image_height /= 2;
                                pr->stereo_pixbuf_offset_right = pr->image_height;
                                }
-                       else if (pr->stereo_data == STEREO_PIXBUF_CROSS) 
+                       else if (pr->stereo_data == STEREO_PIXBUF_CROSS)
                                {
                                pr->image_height /= 2;
                                pr->stereo_pixbuf_offset_left = pr->image_height;
                                }
-                       
+
                        break;
                default:
                        pr->image_width = gdk_pixbuf_get_width(pr->pixbuf);
                        pr->image_height = gdk_pixbuf_get_height(pr->pixbuf);
-                       if (pr->stereo_data == STEREO_PIXBUF_SBS) 
+                       if (pr->stereo_data == STEREO_PIXBUF_SBS)
                                {
                                pr->image_width /= 2;
                                pr->stereo_pixbuf_offset_right = pr->image_width;
                                }
-                       else if (pr->stereo_data == STEREO_PIXBUF_CROSS) 
+                       else if (pr->stereo_data == STEREO_PIXBUF_CROSS)
                                {
                                pr->image_width /= 2;
                                pr->stereo_pixbuf_offset_left = pr->image_width;
@@ -2424,8 +2431,6 @@ static void pr_set_pixbuf(PixbufRenderer *pr, GdkPixbuf *pixbuf, gdouble zoom, P
 
        if (!pr->pixbuf)
                {
-               GtkWidget *box;
-
                /* no pixbuf so just clear the window */
                pr->image_width = 0;
                pr->image_height = 0;
@@ -2433,27 +2438,15 @@ static void pr_set_pixbuf(PixbufRenderer *pr, GdkPixbuf *pixbuf, gdouble zoom, P
                pr->zoom = zoom; /* don't throw away the zoom value, it is set by pixbuf_renderer_move, among others,
                                    and used for pixbuf_renderer_zoom_get */
 
-               box = GTK_WIDGET(pr);
-
-#if GTK_CHECK_VERSION(2,20,0)
-               if (gtk_widget_get_realized(box))
-#else
-               if (GTK_WIDGET_REALIZED(box))
-#endif
-                       {
-#if !GTK_CHECK_VERSION(3,0,0)
-                       gdk_window_clear(gtk_widget_get_window(box));
-#endif
-                       pr->renderer->overlay_draw(pr->renderer, 0, 0, pr->viewport_width, pr->viewport_height);
-                       if (pr->renderer2) pr->renderer2->overlay_draw(pr->renderer2, 0, 0, pr->viewport_width, pr->viewport_height);
-                       }
+               pr->renderer->update_pixbuf(pr->renderer, flags & PR_ZOOM_LAZY);
+               if (pr->renderer2) pr->renderer2->update_pixbuf(pr->renderer2, flags & PR_ZOOM_LAZY);
 
                pr_update_signal(pr);
 
                return;
                }
 
-       if (pr->stereo_mode & PR_STEREO_TEMP_DISABLE) 
+       if (pr->stereo_mode & PR_STEREO_TEMP_DISABLE)
                {
                gint disable = !pr->pixbuf || ! pr->stereo_data;
                pr_stereo_temp_disable(pr, disable);
@@ -2503,15 +2496,7 @@ void pixbuf_renderer_set_orientation(PixbufRenderer *pr, gint orientation)
        pr->orientation = orientation;
 
        pr_pixbuf_size_sync(pr);
-       if (0)
-               {
-               pr->renderer->update_pixbuf(pr->renderer, FALSE);
-               if (pr->renderer2) pr->renderer2->update_pixbuf(pr->renderer2, FALSE);
-               }
        pr_zoom_sync(pr, pr->zoom, PR_ZOOM_FORCE, 0, 0);
-
-       pr->renderer->update_sizes(pr->renderer);
-       if (pr->renderer2) pr->renderer2->update_sizes(pr->renderer2);
 }
 
 gint pixbuf_renderer_get_orientation(PixbufRenderer *pr)
@@ -2523,10 +2508,12 @@ gint pixbuf_renderer_get_orientation(PixbufRenderer *pr)
 void pixbuf_renderer_set_stereo_data(PixbufRenderer *pr, StereoPixbufData stereo_data)
 {
        g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+       if (pr->stereo_data == stereo_data) return;
+
 
        pr->stereo_data = stereo_data;
 
-       if (pr->stereo_mode & PR_STEREO_TEMP_DISABLE) 
+       if (pr->stereo_mode & PR_STEREO_TEMP_DISABLE)
                {
                gint disable = !pr->pixbuf || ! pr->stereo_data;
                pr_stereo_temp_disable(pr, disable);
@@ -2608,8 +2595,61 @@ void pixbuf_renderer_move(PixbufRenderer *pr, PixbufRenderer *source)
        pr->scroll_reset = scroll_reset;
 
        pixbuf_renderer_set_pixbuf(source, NULL, source->zoom);
-//     pr_queue_clear(source);
-//     pr_tile_free_all(source);
+}
+
+void pixbuf_renderer_copy(PixbufRenderer *pr, PixbufRenderer *source)
+{
+       GObject *object;
+       PixbufRendererScrollResetType scroll_reset;
+
+       g_return_if_fail(IS_PIXBUF_RENDERER(pr));
+       g_return_if_fail(IS_PIXBUF_RENDERER(source));
+
+       if (pr == source) return;
+
+       object = G_OBJECT(pr);
+
+       g_object_set(object, "zoom_min", source->zoom_min, NULL);
+       g_object_set(object, "zoom_max", source->zoom_max, NULL);
+       g_object_set(object, "loading", source->loading, NULL);
+
+       pr->complete = source->complete;
+
+       pr->x_scroll = source->x_scroll;
+       pr->y_scroll = source->y_scroll;
+       pr->x_mouse  = source->x_mouse;
+       pr->y_mouse  = source->y_mouse;
+
+       scroll_reset = pr->scroll_reset;
+       pr->scroll_reset = PR_SCROLL_RESET_NOCHANGE;
+
+       pr->orientation = source->orientation;
+       pr->stereo_data = source->stereo_data;
+
+       if (source->source_tiles_enabled)
+               {
+               pr->source_tiles_enabled = source->source_tiles_enabled;
+               pr->source_tiles_cache_size = source->source_tiles_cache_size;
+               pr->source_tile_width = source->source_tile_width;
+               pr->source_tile_height = source->source_tile_height;
+               pr->image_width = source->image_width;
+               pr->image_height = source->image_height;
+
+               pr->func_tile_request = source->func_tile_request;
+               pr->func_tile_dispose = source->func_tile_dispose;
+               pr->func_tile_data = source->func_tile_data;
+
+               pr->source_tiles = source->source_tiles;
+               source->source_tiles = NULL;
+
+               pr_zoom_sync(pr, source->zoom, PR_ZOOM_FORCE | PR_ZOOM_NEW, 0, 0);
+               }
+       else
+               {
+               pixbuf_renderer_set_pixbuf(pr, source->pixbuf, source->zoom);
+               }
+
+       pr->scroll_reset = scroll_reset;
 }
 
 void pixbuf_renderer_area_changed(PixbufRenderer *pr, gint x, gint y, gint w, gint h)
@@ -2682,13 +2722,13 @@ void pixbuf_renderer_zoom_set_limits(PixbufRenderer *pr, gdouble min, gdouble ma
 
 static void pr_stereo_set(PixbufRenderer *pr)
 {
-       if (!pr->renderer) pr->renderer = RENDERER_NEW(pr);
-       
+       if (!pr->renderer) pr->renderer = pr_backend_renderer_new(pr);
+
        pr->renderer->stereo_set(pr->renderer, pr->stereo_mode & ~PR_STEREO_MIRROR_RIGHT & ~PR_STEREO_FLIP_RIGHT);
-       
+
        if (pr->stereo_mode & (PR_STEREO_HORIZ | PR_STEREO_VERT | PR_STEREO_FIXED))
                {
-               if (!pr->renderer2) pr->renderer2 = RENDERER_NEW(pr);
+               if (!pr->renderer2) pr->renderer2 = pr_backend_renderer_new(pr);
                pr->renderer2->stereo_set(pr->renderer2, (pr->stereo_mode & ~PR_STEREO_MIRROR_LEFT & ~PR_STEREO_FLIP_LEFT) | PR_STEREO_RIGHT);
                }
        else
@@ -2713,12 +2753,12 @@ void pixbuf_renderer_stereo_set(PixbufRenderer *pr, gint stereo_mode)
        gboolean redraw = !(pr->stereo_mode == stereo_mode) || pr->stereo_temp_disable;
        pr->stereo_mode = stereo_mode;
        if ((stereo_mode & PR_STEREO_TEMP_DISABLE) && pr->stereo_temp_disable) return;
-       
+
        pr->stereo_temp_disable = FALSE;
-       
+
        pr_stereo_set(pr);
-       
-       if (redraw) 
+
+       if (redraw)
                {
                pr_size_sync(pr, pr->window_width, pr->window_height); /* recalculate new viewport */
                pr_zoom_sync(pr, pr->zoom, PR_ZOOM_FORCE | PR_ZOOM_NEW, 0, 0);
@@ -2746,7 +2786,7 @@ static void pr_stereo_temp_disable(PixbufRenderer *pr, gboolean disable)
        pr->stereo_temp_disable = disable;
        if (disable)
                {
-               if (!pr->renderer) pr->renderer = RENDERER_NEW(pr);
+               if (!pr->renderer) pr->renderer = pr_backend_renderer_new(pr);
                pr->renderer->stereo_set(pr->renderer, PR_STEREO_NONE);
                if (pr->renderer2) pr->renderer2->free(pr->renderer2);
                pr->renderer2 = NULL;
@@ -2759,14 +2799,15 @@ static void pr_stereo_temp_disable(PixbufRenderer *pr, gboolean disable)
        pr_size_sync(pr, pr->window_width, pr->window_height); /* recalculate new viewport */
 }
 
-gboolean pixbuf_renderer_get_pixel_colors(PixbufRenderer *pr, gint x_pixel, gint y_pixel, 
+gboolean pixbuf_renderer_get_pixel_colors(PixbufRenderer *pr, gint x_pixel, gint y_pixel,
                                           gint *r_mouse, gint *g_mouse, gint *b_mouse)
 {
        GdkPixbuf *pb = pr->pixbuf;
        gint p_alpha, prs;
        guchar *p_pix, *pp;
        gint map_x, map_y, map_w, map_h;
-       
+       size_t xoff, yoff;
+
        g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
        g_return_val_if_fail(r_mouse != NULL && g_mouse != NULL && b_mouse != NULL, FALSE);
 
@@ -2777,7 +2818,7 @@ gboolean pixbuf_renderer_get_pixel_colors(PixbufRenderer *pr, gint x_pixel, gint
                *b_mouse = -1;
                return FALSE;
                }
-       
+
        if (!pb) return FALSE;
 
        pr_tile_region_map_orientation(pr->orientation,
@@ -2789,25 +2830,27 @@ gboolean pixbuf_renderer_get_pixel_colors(PixbufRenderer *pr, gint x_pixel, gint
 
        if (map_x < 0 || map_x > gdk_pixbuf_get_width(pr->pixbuf) - 1) return  FALSE;
        if (map_y < 0 || map_y > gdk_pixbuf_get_height(pr->pixbuf) - 1) return  FALSE;
-       
+
        p_alpha = gdk_pixbuf_get_has_alpha(pb);
        prs = gdk_pixbuf_get_rowstride(pb);
        p_pix = gdk_pixbuf_get_pixels(pb);
 
-       pp = p_pix + map_y * prs + (map_x * (p_alpha ? 4 : 3));
+       xoff = (size_t)map_x * (p_alpha ? 4 : 3);
+       yoff = (size_t)map_y * prs;
+       pp = p_pix + yoff + xoff;
        *r_mouse = *pp;
        pp++;
        *g_mouse = *pp;
        pp++;
        *b_mouse = *pp;
-       
+
        return TRUE;
 }
 
 gboolean pixbuf_renderer_get_mouse_position(PixbufRenderer *pr, gint *x_pixel_return, gint *y_pixel_return)
 {
        gint x_pixel, y_pixel, x_pixel_clamped, y_pixel_clamped;
-            
+
        g_return_val_if_fail(IS_PIXBUF_RENDERER(pr), FALSE);
        g_return_val_if_fail(x_pixel_return != NULL && y_pixel_return != NULL, FALSE);
 
@@ -2817,12 +2860,12 @@ gboolean pixbuf_renderer_get_mouse_position(PixbufRenderer *pr, gint *x_pixel_re
                *y_pixel_return = -1;
                return FALSE;
                }
-       
+
        x_pixel = floor((gdouble)(pr->x_mouse - pr->x_offset + pr->x_scroll) / pr->scale);
        y_pixel = floor((gdouble)(pr->y_mouse - pr->y_offset + pr->y_scroll) / pr->scale / pr->aspect_ratio);
        x_pixel_clamped = CLAMP(x_pixel, 0, pr->image_width - 1);
        y_pixel_clamped = CLAMP(y_pixel, 0, pr->image_height - 1);
-       
+
        if(x_pixel != x_pixel_clamped || y_pixel != y_pixel_clamped)
                {
                /* mouse is not on pr */
@@ -2831,7 +2874,7 @@ gboolean pixbuf_renderer_get_mouse_position(PixbufRenderer *pr, gint *x_pixel_re
 
        *x_pixel_return = x_pixel;
        *y_pixel_return = y_pixel;
-       
+
        return TRUE;
 }
 
@@ -2914,6 +2957,9 @@ gboolean pixbuf_renderer_get_virtual_rect(PixbufRenderer *pr, GdkRectangle *rect
 
 void pixbuf_renderer_set_size_early(PixbufRenderer *pr, guint width, guint height)
 {
+#if 0
+       /* FIXME: this function does not consider the image orientation,
+       so it probably only breaks something */
        gdouble zoom;
        gint w, h;
 
@@ -2928,6 +2974,7 @@ void pixbuf_renderer_set_size_early(PixbufRenderer *pr, guint width, guint heigh
 
        //pr->width = width;
        //pr->height = height;
+#endif
 }
 
 /* vim: set shiftwidth=8 softtabstop=0 cindent cinoptions={1s: */