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-rw-r--r--savers/gste-slideshow.c.orig1001
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+/* -*- Mode: C; indent-tabs-mode: nil; c-basic-offset: 8; tab-width: 8 -*-
+ *
+ * Copyright (C) 2005-2006 William Jon McCann <[email protected]>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ *
+ */
+
+#include "config.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <string.h>
+
+#include <glib.h>
+#include <gtk/gtk.h>
+
+#include "gs-theme-engine.h"
+#include "gste-slideshow.h"
+
+static void gste_slideshow_class_init (GSTESlideshowClass *klass);
+static void gste_slideshow_init (GSTESlideshow *engine);
+static void gste_slideshow_finalize (GObject *object);
+
+struct GSTESlideshowPrivate
+{
+ /* Image at full opacity */
+ cairo_pattern_t *pat1;
+ /* Image at partial opacity */
+ cairo_pattern_t *pat2;
+ /* Alpha of pat2 */
+ gdouble alpha2;
+ /* edges of pat2 */
+ int pat2top;
+ int pat2bottom;
+ int pat2left;
+ int pat2right;
+
+ /* backbuffer that we do all the alpha drawing into (no round
+ * trips to the X server when the server doesn't support drawing
+ * pixmaps with alpha?) */
+ cairo_surface_t *surf;
+
+ gint64 fade_ticks;
+
+ GThread *load_thread;
+ GAsyncQueue *op_q;
+ GAsyncQueue *results_q;
+
+ guint results_pull_id;
+ guint update_image_id;
+
+ GSList *filename_list;
+ char *images_location;
+ gboolean sort_images;
+ int window_width;
+ int window_height;
+ PangoColor *background_color;
+ gboolean no_stretch_hint;
+
+ guint timeout_id;
+
+ GTimer *timer;
+ gboolean fade_disabled;
+};
+
+enum {
+ PROP_0,
+ PROP_IMAGES_LOCATION,
+ PROP_SORT_IMAGES,
+ PROP_SOLID_BACKGROUND,
+ PROP_NO_STRETCH_HINT
+};
+
+#define GSTE_SLIDESHOW_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GSTE_TYPE_SLIDESHOW, GSTESlideshowPrivate))
+
+static GObjectClass *parent_class = NULL;
+
+G_DEFINE_TYPE (GSTESlideshow, gste_slideshow, GS_TYPE_THEME_ENGINE)
+
+#define N_FADE_TICKS 10
+#define MINIMUM_FPS 3.0
+#define DEFAULT_IMAGES_LOCATION DATADIR "/pixmaps/backgrounds"
+#define IMAGE_LOAD_TIMEOUT 10000
+
+typedef struct _Op
+{
+ char *location;
+ GSTESlideshow *slideshow;
+} Op;
+
+typedef struct _OpResult
+{
+ GdkPixbuf *pixbuf;
+} OpResult;
+
+static gboolean
+push_load_image_func (GSTESlideshow *show)
+{
+ Op *op;
+
+ gs_theme_engine_profile_msg ("Starting a new image load");
+
+ op = g_new (Op, 1);
+
+ op->location = g_strdup (show->priv->images_location);
+ op->slideshow = g_object_ref (show);
+
+ g_async_queue_push (show->priv->op_q, op);
+
+ show->priv->update_image_id = 0;
+
+ return FALSE;
+}
+
+static void
+start_new_load (GSTESlideshow *show,
+ guint timeout)
+{
+ gs_theme_engine_profile_msg ("Scheduling a new image load");
+
+ /* queue a new load */
+ if (show->priv->update_image_id <= 0) {
+ show->priv->update_image_id = g_timeout_add_full (G_PRIORITY_LOW, timeout,
+ (GSourceFunc)push_load_image_func,
+ show, NULL);
+ }
+}
+
+static void
+start_fade (GSTESlideshow *show,
+ GdkPixbuf *pixbuf)
+{
+ int pw;
+ int ph;
+ int x;
+ int y;
+ cairo_t *cr;
+ int window_width;
+ int window_height;
+
+ gs_theme_engine_profile_start ("start");
+
+ window_width = show->priv->window_width;
+ window_height = show->priv->window_height;
+
+ if (show->priv->pat2 != NULL) {
+ cairo_pattern_destroy (show->priv->pat2);
+ }
+
+ pw = gdk_pixbuf_get_width (pixbuf);
+ ph = gdk_pixbuf_get_height (pixbuf);
+ x = (window_width - pw) / 2;
+ y = (window_height - ph) / 2;
+
+ if (gdk_pixbuf_get_has_alpha (pixbuf) && show->priv->background_color) {
+ GdkPixbuf *colored;
+ guint32 color;
+ GdkPixmap *pixmap;
+
+ color = (show->priv->background_color->red << 16)
+ + (show->priv->background_color->green / 256 << 8)
+ + show->priv->background_color->blue / 256;
+ colored = gdk_pixbuf_composite_color_simple (pixbuf,
+ pw, ph,
+ GDK_INTERP_BILINEAR,
+ 255,
+ 256,
+ color,
+ color);
+ pixmap = gdk_pixmap_new (NULL, ph, pw, gdk_visual_get_system ()->depth);
+
+ gdk_draw_pixbuf (pixmap, NULL, colored, 0, 0, 0, 0, -1, -1, GDK_RGB_DITHER_MAX, 0, 0);
+ gdk_pixbuf_get_from_drawable (pixbuf, pixmap, NULL, 0, 0, 0, 0, -1, -1);
+
+ g_object_unref (pixmap);
+
+ g_object_unref(colored);
+ }
+
+ cr = cairo_create (show->priv->surf);
+
+ /* XXX Handle out of memory? */
+ gdk_cairo_set_source_pixbuf (cr, pixbuf, x, y);
+ show->priv->pat2 = cairo_pattern_reference (cairo_get_source (cr));
+ show->priv->pat2top = y;
+ show->priv->pat2bottom = y + ph;
+ show->priv->pat2left = x;
+ show->priv->pat2right = x + pw;
+
+ cairo_destroy (cr);
+
+ show->priv->fade_ticks = 0;
+ g_timer_start (show->priv->timer);
+
+ gs_theme_engine_profile_end ("end");
+}
+
+static void
+finish_fade (GSTESlideshow *show)
+{
+ gs_theme_engine_profile_start ("start");
+
+ if (show->priv->pat1 != NULL) {
+ cairo_pattern_destroy (show->priv->pat1);
+ }
+
+ show->priv->pat1 = show->priv->pat2;
+ show->priv->pat2 = NULL;
+
+ start_new_load (show, IMAGE_LOAD_TIMEOUT);
+
+ gs_theme_engine_profile_end ("end");
+}
+
+static void
+update_display (GSTESlideshow *show)
+{
+ int window_width;
+ int window_height;
+ cairo_t *cr;
+
+ gs_theme_engine_profile_start ("start");
+
+ cr = cairo_create (show->priv->surf);
+
+ gs_theme_engine_get_window_size (GS_THEME_ENGINE (show),
+ &window_width,
+ &window_height);
+
+ if (show->priv->pat2 != NULL) {
+ /* fade out areas not covered by the new image */
+ /* top */
+ cairo_rectangle (cr, 0, 0, window_width, show->priv->pat2top);
+ if (show->priv->background_color) {
+ cairo_set_source_rgba (cr, show->priv->background_color->red / 65535.0,
+ show->priv->background_color->green / 65535.0,
+ show->priv->background_color->blue / 65535.0, show->priv->alpha2);
+ } else {
+ cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, show->priv->alpha2);
+ }
+ cairo_fill (cr);
+ /* left (excluding what's covered by top and bottom) */
+ cairo_rectangle (cr, 0, show->priv->pat2top,
+ show->priv->pat2left,
+ show->priv->pat2bottom - show->priv->pat2top);
+ if (show->priv->background_color) {
+ cairo_set_source_rgba (cr, show->priv->background_color->red / 65535.0,
+ show->priv->background_color->green / 65535.0,
+ show->priv->background_color->blue / 65535.0, show->priv->alpha2);
+ } else {
+ cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, show->priv->alpha2);
+ }
+ cairo_fill (cr);
+ /* bottom */
+ cairo_rectangle (cr, 0, show->priv->pat2bottom, window_width,
+ window_height - show->priv->pat2bottom);
+ if (show->priv->background_color) {
+ cairo_set_source_rgba (cr, show->priv->background_color->red / 65535.0,
+ show->priv->background_color->green / 65535.0,
+ show->priv->background_color->blue / 65535.0, show->priv->alpha2);
+ } else {
+ cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, show->priv->alpha2);
+ }
+ cairo_fill (cr);
+ /* right (excluding what's covered by top and bottom) */
+ cairo_rectangle (cr, show->priv->pat2right,
+ show->priv->pat2top,
+ window_width - show->priv->pat2right,
+ show->priv->pat2bottom - show->priv->pat2top);
+ if (show->priv->background_color) {
+ cairo_set_source_rgba (cr, show->priv->background_color->red / 65535.0,
+ show->priv->background_color->green / 65535.0,
+ show->priv->background_color->blue / 65535.0, show->priv->alpha2);
+ } else {
+ cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, show->priv->alpha2);
+ }
+ cairo_fill (cr);
+
+ gs_theme_engine_profile_start ("paint pattern to surface");
+ cairo_set_source (cr, show->priv->pat2);
+
+ cairo_paint_with_alpha (cr, show->priv->alpha2);
+ gs_theme_engine_profile_end ("paint pattern to surface");
+ } else {
+ if (show->priv->pat1 != NULL) {
+ cairo_set_source (cr, show->priv->pat1);
+ cairo_paint (cr);
+ }
+ }
+
+ cairo_destroy (cr);
+
+ /* paint the image buffer into the window */
+ cr = gdk_cairo_create (GTK_WIDGET (show)->window);
+
+ cairo_set_source_surface (cr, show->priv->surf, 0, 0);
+
+ gs_theme_engine_profile_start ("paint surface to window");
+ cairo_paint (cr);
+ gs_theme_engine_profile_end ("paint surface to window");
+
+ cairo_destroy (cr);
+
+ gs_theme_engine_profile_end ("end");
+}
+
+static gboolean
+draw_iter (GSTESlideshow *show)
+{
+ double old_opacity;
+ double new_opacity;
+
+ if (show->priv->pat2 != NULL) {
+ gdouble fps;
+ gdouble elapsed;
+
+ if (show->priv->fade_disabled) {
+ show->priv->alpha2 = 1.0;
+ update_display (show);
+ finish_fade (show);
+ return TRUE;
+ }
+
+ /* we are in a fade */
+ show->priv->fade_ticks++;
+
+ /*
+ * We have currently drawn pat2 with old_opacity, and we
+ * want to set alpha2 so that drawing pat2 at alpha2
+ * yields it drawn with new_opacity
+ *
+ * Solving
+ * new_opacity = 1 - (1 - alpha2) * (1 - old_opacity)
+ * yields
+ * alpha2 = 1 - (1 - new_opacity) / (1 - old_opacity)
+ *
+ * XXX This assumes that cairo doesn't correct alpha for
+ * the color profile. However, any error is guaranteed
+ * to be cleaned up by the last iteration, where alpha2
+ * becomes 1 because new_opacity is 1.
+ */
+ old_opacity = (double) (show->priv->fade_ticks - 1) /
+ (double) N_FADE_TICKS;
+ new_opacity = (double) show->priv->fade_ticks /
+ (double) N_FADE_TICKS;
+ show->priv->alpha2 = 1.0 - (1.0 - new_opacity) /
+ (1.0 - old_opacity);
+
+ update_display (show);
+
+ elapsed = g_timer_elapsed (show->priv->timer, NULL);
+ fps = (gdouble)show->priv->fade_ticks / elapsed;
+ if (fps < MINIMUM_FPS) {
+ g_warning ("Getting less than %.2f frames per second, disabling fade", MINIMUM_FPS);
+ show->priv->fade_ticks = N_FADE_TICKS - 1;
+ show->priv->fade_disabled = TRUE;
+ }
+
+ if (show->priv->fade_ticks >= N_FADE_TICKS) {
+ finish_fade (show);
+ }
+ }
+
+ return TRUE;
+}
+
+static void
+process_new_pixbuf (GSTESlideshow *show,
+ GdkPixbuf *pixbuf)
+{
+ gs_theme_engine_profile_msg ("Processing a new image");
+
+ if (pixbuf != NULL) {
+ start_fade (show, pixbuf);
+ } else {
+ start_new_load (show, 10);
+ }
+}
+
+static void
+op_result_free (OpResult *result)
+{
+ if (result == NULL) {
+ return;
+ }
+
+ if (result->pixbuf != NULL) {
+ g_object_unref (result->pixbuf);
+ }
+
+ g_free (result);
+}
+
+static gboolean
+results_pull_func (GSTESlideshow *show)
+{
+ OpResult *result;
+
+ GDK_THREADS_ENTER ();
+
+ g_async_queue_lock (show->priv->results_q);
+
+ result = g_async_queue_try_pop_unlocked (show->priv->results_q);
+ g_assert (result);
+
+ while (result != NULL) {
+ process_new_pixbuf (show, result->pixbuf);
+ op_result_free (result);
+
+ result = g_async_queue_try_pop_unlocked (show->priv->results_q);
+ }
+
+ show->priv->results_pull_id = 0;
+
+ g_async_queue_unlock (show->priv->results_q);
+
+ GDK_THREADS_LEAVE ();
+
+ return FALSE;
+}
+
+static GdkPixbuf *
+scale_pixbuf (GdkPixbuf *pixbuf,
+ int max_width,
+ int max_height,
+ gboolean no_stretch_hint)
+{
+ int pw;
+ int ph;
+ float scale_factor_x = 1.0;
+ float scale_factor_y = 1.0;
+ float scale_factor = 1.0;
+
+ pw = gdk_pixbuf_get_width (pixbuf);
+ ph = gdk_pixbuf_get_height (pixbuf);
+
+ /* If the image is less than 256 wide or high then it
+ is probably a thumbnail and we should ignore it */
+ if (pw < 256 || ph < 256) {
+ return NULL;
+ }
+
+ /* Determine which dimension requires the smallest scale. */
+ scale_factor_x = (float) max_width / (float) pw;
+ scale_factor_y = (float) max_height / (float) ph;
+
+ if (scale_factor_x > scale_factor_y) {
+ scale_factor = scale_factor_y;
+ } else {
+ scale_factor = scale_factor_x;
+ }
+
+ /* always scale down, allow to disable scaling up */
+ if (scale_factor < 1.0 || !no_stretch_hint) {
+ int scale_x;
+ int scale_y;
+
+ scale_x = (int) (pw * scale_factor);
+ scale_y = (int) (ph * scale_factor);
+ return gdk_pixbuf_scale_simple (pixbuf,
+ scale_x,
+ scale_y,
+ GDK_INTERP_BILINEAR);
+ } else {
+ return g_object_ref (pixbuf);
+ }
+}
+
+static void
+add_files_to_list (GSList **list,
+ const char *base)
+{
+ GDir *d;
+ const char *d_name;
+
+ d = g_dir_open (base, 0, NULL);
+ if (d == NULL) {
+ g_warning ("Could not open directory: %s", base);
+ return;
+ }
+
+ while ((d_name = g_dir_read_name (d)) != NULL) {
+ char *path;
+
+ /* skip hidden files */
+ if (d_name[0] == '.') {
+ continue;
+ }
+
+ path = g_build_filename (base, d_name, NULL);
+ if (g_file_test (path, G_FILE_TEST_IS_DIR)) {
+ add_files_to_list (list, path);
+ g_free (path);
+ } else {
+ *list = g_slist_prepend (*list, path);
+ }
+ }
+
+ g_dir_close (d);
+}
+
+static GSList *
+build_filename_list_local_dir (const char *base)
+{
+ GSList *list = NULL;
+
+ add_files_to_list (&list, base);
+
+ return list;
+}
+
+static int
+gste_strcmp_compare_func (gconstpointer string_a, gconstpointer string_b)
+{
+ return strcmp (string_a == NULL ? "" : string_a,
+ string_b == NULL ? "" : string_b);
+}
+
+
+static GdkPixbuf *
+get_pixbuf_from_local_dir (GSTESlideshow *show,
+ const char *location)
+{
+ GdkPixbuf *pixbuf, *transformed_pixbuf;
+ char *filename;
+ int i;
+ GSList *l;
+
+ /* rebuild the cache */
+ if (show->priv->filename_list == NULL) {
+ show->priv->filename_list = build_filename_list_local_dir (location);
+ }
+
+ if (show->priv->filename_list == NULL) {
+ return NULL;
+ } else {
+ if (show->priv->sort_images) {
+ show->priv->filename_list = g_slist_sort (show->priv->filename_list, gste_strcmp_compare_func);
+ }
+ }
+
+ /* get a random filename if needed */
+ if (! show->priv->sort_images) {
+ i = g_random_int_range (0, g_slist_length (show->priv->filename_list));
+ l = g_slist_nth (show->priv->filename_list, i);
+ } else {
+ l = show->priv->filename_list;
+ }
+ filename = l->data;
+
+ pixbuf = gdk_pixbuf_new_from_file (filename, NULL);
+
+ if (pixbuf != NULL) {
+ transformed_pixbuf = gdk_pixbuf_apply_embedded_orientation (pixbuf);
+ g_object_unref (pixbuf);
+ } else {
+ transformed_pixbuf = NULL;
+ }
+
+ g_free (filename);
+ show->priv->filename_list = g_slist_delete_link (show->priv->filename_list, l);
+
+ return transformed_pixbuf;
+}
+
+static GdkPixbuf *
+get_pixbuf_from_location (GSTESlideshow *show,
+ const char *location)
+{
+ GdkPixbuf *pixbuf = NULL;
+ gboolean is_dir;
+
+ if (location == NULL) {
+ return NULL;
+ }
+
+ is_dir = g_file_test (location, G_FILE_TEST_IS_DIR);
+
+ if (is_dir) {
+ pixbuf = get_pixbuf_from_local_dir (show, location);
+ }
+
+ return pixbuf;
+}
+
+static GdkPixbuf *
+get_pixbuf (GSTESlideshow *show,
+ const char *location,
+ int width,
+ int height)
+{
+ GdkPixbuf *pixbuf;
+ GdkPixbuf *scaled = NULL;
+
+ if (location == NULL) {
+ return NULL;
+ }
+
+ pixbuf = get_pixbuf_from_location (show, location);
+
+ if (pixbuf != NULL) {
+ scaled = scale_pixbuf (pixbuf, width, height, show->priv->no_stretch_hint);
+ g_object_unref (pixbuf);
+ }
+
+ return scaled;
+}
+
+static void
+op_load_image (GSTESlideshow *show,
+ const char *location)
+{
+ OpResult *op_result;
+ int window_width;
+ int window_height;
+
+ window_width = show->priv->window_width;
+ window_height = show->priv->window_height;
+
+ op_result = g_new0 (OpResult, 1);
+
+ op_result->pixbuf = get_pixbuf (show,
+ location,
+ window_width,
+ window_height);
+
+ GDK_THREADS_ENTER ();
+ g_async_queue_lock (show->priv->results_q);
+ g_async_queue_push_unlocked (show->priv->results_q, op_result);
+
+ if (show->priv->results_pull_id == 0) {
+ show->priv->results_pull_id = g_idle_add_full (G_PRIORITY_HIGH_IDLE,
+ (GSourceFunc)results_pull_func,
+ show, NULL);
+ }
+
+ g_async_queue_unlock (show->priv->results_q);
+ GDK_THREADS_LEAVE ();
+}
+
+static gpointer
+load_threadfunc (GAsyncQueue *op_q)
+{
+ Op *op;
+
+ op = g_async_queue_pop (op_q);
+ while (op) {
+ op_load_image (op->slideshow,
+ op->location);
+
+ if (op->slideshow != NULL) {
+ g_object_unref (op->slideshow);
+ }
+ g_free (op->location);
+ g_free (op);
+
+ op = g_async_queue_pop (op_q);
+ }
+
+ return NULL;
+}
+
+void
+gste_slideshow_set_images_location (GSTESlideshow *show,
+ const char *location)
+{
+ g_return_if_fail (GSTE_IS_SLIDESHOW (show));
+
+ g_free (show->priv->images_location);
+ show->priv->images_location = g_strdup (location);
+}
+
+
+void
+gste_slideshow_set_sort_images (GSTESlideshow *show,
+ gboolean sort_images)
+{
+ g_return_if_fail (GSTE_IS_SLIDESHOW (show));
+
+ show->priv->sort_images = sort_images;
+}
+
+void
+gste_slideshow_set_no_stretch_hint (GSTESlideshow *show,
+ gboolean no_stretch_hint)
+{
+ g_return_if_fail (GSTE_IS_SLIDESHOW (show));
+
+ show->priv->no_stretch_hint = no_stretch_hint;
+}
+
+void
+gste_slideshow_set_background_color (GSTESlideshow *show,
+ const char *background_color)
+{
+ g_return_if_fail (GSTE_IS_SLIDESHOW (show));
+
+ if (show->priv->background_color != NULL) {
+ g_slice_free (PangoColor, show->priv->background_color);
+ show->priv->background_color = NULL;
+ }
+
+ if (background_color != NULL) {
+ show->priv->background_color = g_slice_new (PangoColor);
+
+ if (pango_color_parse (show->priv->background_color, background_color) == FALSE) {
+ g_slice_free (PangoColor, show->priv->background_color);
+ show->priv->background_color = NULL;
+ }
+ }
+}
+
+static void
+gste_slideshow_set_property (GObject *object,
+ guint prop_id,
+ const GValue *value,
+ GParamSpec *pspec)
+{
+ GSTESlideshow *self;
+
+ self = GSTE_SLIDESHOW (object);
+
+ switch (prop_id) {
+ case PROP_IMAGES_LOCATION:
+ gste_slideshow_set_images_location (self, g_value_get_string (value));
+ break;
+ case PROP_SORT_IMAGES:
+ gste_slideshow_set_sort_images (self, g_value_get_boolean (value));
+ break;
+ case PROP_SOLID_BACKGROUND:
+ gste_slideshow_set_background_color (self, g_value_get_string (value));
+ break;
+ case PROP_NO_STRETCH_HINT:
+ gste_slideshow_set_no_stretch_hint (self, g_value_get_boolean (value));
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gste_slideshow_get_property (GObject *object,
+ guint prop_id,
+ GValue *value,
+ GParamSpec *pspec)
+{
+ GSTESlideshow *self;
+
+ self = GSTE_SLIDESHOW (object);
+
+ switch (prop_id) {
+ case PROP_IMAGES_LOCATION:
+ g_value_set_string (value, self->priv->images_location);
+ break;
+ case PROP_SORT_IMAGES:
+ g_value_set_boolean (value, self->priv->sort_images);
+ break;
+ case PROP_SOLID_BACKGROUND:
+ {
+ char *color = NULL;
+ color = pango_color_to_string (self->priv->background_color);
+ g_value_set_string (value, color);
+ g_free (color);
+ break;
+ }
+ case PROP_NO_STRETCH_HINT:
+ g_value_set_boolean (value, self->priv->no_stretch_hint);
+ break;
+ default:
+ G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+ break;
+ }
+}
+
+static void
+gste_slideshow_real_show (GtkWidget *widget)
+{
+ GSTESlideshow *show = GSTE_SLIDESHOW (widget);
+ int delay;
+
+ if (GTK_WIDGET_CLASS (parent_class)->show) {
+ GTK_WIDGET_CLASS (parent_class)->show (widget);
+ }
+
+ start_new_load (show, 10);
+
+ delay = 25;
+ show->priv->timeout_id = g_timeout_add (delay, (GSourceFunc)draw_iter, show);
+
+ if (show->priv->timer != NULL) {
+ g_timer_destroy (show->priv->timer);
+ }
+ show->priv->timer = g_timer_new ();
+}
+
+static gboolean
+gste_slideshow_real_expose (GtkWidget *widget,
+ GdkEventExpose *event)
+{
+ GSTESlideshow *show = GSTE_SLIDESHOW (widget);
+ gboolean handled = FALSE;
+
+ update_display (show);
+
+ if (GTK_WIDGET_CLASS (parent_class)->expose_event) {
+ handled = GTK_WIDGET_CLASS (parent_class)->expose_event (widget, event);
+ }
+
+ return handled;
+}
+
+static gboolean
+gste_slideshow_real_configure (GtkWidget *widget,
+ GdkEventConfigure *event)
+{
+ GSTESlideshow *show = GSTE_SLIDESHOW (widget);
+ gboolean handled = FALSE;
+ cairo_t *cr;
+
+ /* resize */
+ gs_theme_engine_get_window_size (GS_THEME_ENGINE (show),
+ &show->priv->window_width,
+ &show->priv->window_height);
+
+ gs_theme_engine_profile_msg ("Resize to x:%d y:%d",
+ show->priv->window_width,
+ show->priv->window_height);
+
+ if (show->priv->surf != NULL) {
+ cairo_surface_destroy (show->priv->surf);
+ }
+
+ cr = gdk_cairo_create (widget->window);
+ show->priv->surf = cairo_surface_create_similar (cairo_get_target (cr),
+ CAIRO_CONTENT_COLOR,
+ show->priv->window_width,
+ show->priv->window_height);
+ cairo_destroy (cr);
+
+ /* schedule a redraw */
+ gtk_widget_queue_draw (widget);
+
+ if (GTK_WIDGET_CLASS (parent_class)->configure_event) {
+ handled = GTK_WIDGET_CLASS (parent_class)->configure_event (widget, event);
+ }
+
+ return handled;
+}
+
+static void
+gste_slideshow_class_init (GSTESlideshowClass *klass)
+{
+ GObjectClass *object_class = G_OBJECT_CLASS (klass);
+ GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (klass);
+
+ parent_class = g_type_class_peek_parent (klass);
+
+ object_class->finalize = gste_slideshow_finalize;
+ object_class->get_property = gste_slideshow_get_property;
+ object_class->set_property = gste_slideshow_set_property;
+
+ widget_class->show = gste_slideshow_real_show;
+ widget_class->expose_event = gste_slideshow_real_expose;
+ widget_class->configure_event = gste_slideshow_real_configure;
+
+ g_type_class_add_private (klass, sizeof (GSTESlideshowPrivate));
+
+ g_object_class_install_property (object_class,
+ PROP_IMAGES_LOCATION,
+ g_param_spec_string ("images-location",
+ NULL,
+ NULL,
+ NULL,
+ G_PARAM_READWRITE));
+ g_object_class_install_property (object_class,
+ PROP_SORT_IMAGES,
+ g_param_spec_boolean ("sort-images",
+ NULL,
+ NULL,
+ FALSE,
+ G_PARAM_READWRITE));
+ g_object_class_install_property (object_class,
+ PROP_SOLID_BACKGROUND,
+ g_param_spec_string ("background-color",
+ NULL,
+ NULL,
+ NULL,
+ G_PARAM_READWRITE));
+ g_object_class_install_property (object_class,
+ PROP_NO_STRETCH_HINT,
+ g_param_spec_boolean ("no-stretch",
+ NULL,
+ NULL,
+ FALSE,
+ G_PARAM_READWRITE));
+}
+
+static void
+set_colormap (GtkWidget *widget)
+{
+ GdkScreen *screen;
+ GdkColormap *colormap;
+
+ screen = gtk_widget_get_screen (widget);
+ colormap = gdk_screen_get_rgba_colormap (screen);
+ if (colormap == NULL) {
+ colormap = gdk_screen_get_rgb_colormap (screen);
+ }
+
+ gtk_widget_set_colormap (widget, colormap);
+}
+
+static void
+gste_slideshow_init (GSTESlideshow *show)
+{
+ GError *error;
+
+ show->priv = GSTE_SLIDESHOW_GET_PRIVATE (show);
+
+ show->priv->images_location = g_strdup (DEFAULT_IMAGES_LOCATION);
+
+ show->priv->op_q = g_async_queue_new ();
+ show->priv->results_q = g_async_queue_new ();
+
+ error = NULL;
+ show->priv->load_thread = g_thread_create ((GThreadFunc)load_threadfunc, show->priv->op_q, FALSE, &error);
+ if (show->priv->load_thread == NULL) {
+ g_error ("Could not create a thread to load images: %s",
+ error->message);
+ g_error_free (error);
+ exit (-1);
+ }
+
+ set_colormap (GTK_WIDGET (show));
+}
+
+static void
+gste_slideshow_finalize (GObject *object)
+{
+ GSTESlideshow *show;
+ gpointer result;
+
+ g_return_if_fail (object != NULL);
+ g_return_if_fail (GSTE_IS_SLIDESHOW (object));
+
+ show = GSTE_SLIDESHOW (object);
+
+ g_return_if_fail (show->priv != NULL);
+
+ if (show->priv->surf) {
+ cairo_surface_destroy (show->priv->surf);
+ }
+
+ if (show->priv->timeout_id > 0) {
+ g_source_remove (show->priv->timeout_id);
+ show->priv->timeout_id = 0;
+ }
+
+ if (show->priv->results_pull_id > 0) {
+ g_source_remove (show->priv->results_pull_id);
+ }
+
+ if (show->priv->results_q != NULL) {
+ result = g_async_queue_try_pop (show->priv->results_q);
+
+ while (result) {
+ result = g_async_queue_try_pop (show->priv->results_q);
+ }
+ g_async_queue_unref (show->priv->results_q);
+ }
+
+ g_free (show->priv->images_location);
+ show->priv->images_location = NULL;
+
+ if (show->priv->background_color) {
+ g_slice_free (PangoColor, show->priv->background_color);
+ show->priv->background_color = NULL;
+ }
+
+ if (show->priv->timer != NULL) {
+ g_timer_destroy (show->priv->timer);
+ }
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}