diff options
Diffstat (limited to 'demos/testanimation.c')
| -rw-r--r-- | demos/testanimation.c | 444 |
1 files changed, 0 insertions, 444 deletions
diff --git a/demos/testanimation.c b/demos/testanimation.c deleted file mode 100644 index 4d00a9d807..0000000000 --- a/demos/testanimation.c +++ /dev/null @@ -1,444 +0,0 @@ - -/* testpixbuf -- test program for gdk-pixbuf code - * Copyright (C) 1999 Mark Crichton, Larry Ewing - * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2 of the License, or (at your option) any later version. - * - * This library 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; 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 <errno.h> -#include <gtk/gtk.h> - -typedef struct _LoadContext LoadContext; - -struct _LoadContext -{ - gchar *filename; - GtkWidget *window; - GdkPixbufLoader *pixbuf_loader; - guint load_timeout; - FILE* image_stream; -}; - -static void -destroy_context (gpointer data) -{ - LoadContext *lc = data; - - g_free (lc->filename); - - if (lc->load_timeout) - g_source_remove (lc->load_timeout); - - if (lc->image_stream) - fclose (lc->image_stream); - - if (lc->pixbuf_loader) - { - gdk_pixbuf_loader_close (lc->pixbuf_loader, NULL); - g_object_unref (lc->pixbuf_loader); - } - - g_free (lc); -} - -static LoadContext* -get_load_context (GtkWidget *image) -{ - LoadContext *lc; - - lc = g_object_get_data (G_OBJECT (image), "lc"); - - if (lc == NULL) - { - lc = g_new0 (LoadContext, 1); - - g_object_set_data_full (G_OBJECT (image), - "lc", - lc, - destroy_context); - } - - return lc; -} - -static void -progressive_prepared_callback (GdkPixbufLoader* loader, - gpointer data) -{ - GdkPixbuf* pixbuf; - GtkWidget* image; - - image = GTK_WIDGET (data); - - pixbuf = gdk_pixbuf_loader_get_pixbuf (loader); - - /* Avoid displaying random memory contents, since the pixbuf - * isn't filled in yet. - */ - gdk_pixbuf_fill (pixbuf, 0xaaaaaaff); - - /* Could set the pixbuf instead, if we only wanted to display - * static images. - */ - gtk_image_set_from_animation (GTK_IMAGE (image), - gdk_pixbuf_loader_get_animation (loader)); -} - -static void -progressive_updated_callback (GdkPixbufLoader* loader, - gint x, gint y, gint width, gint height, - gpointer data) -{ - GtkWidget* image; - - image = GTK_WIDGET (data); - - /* We know the pixbuf inside the GtkImage has changed, but the image - * itself doesn't know this; so queue a redraw. If we wanted to be - * really efficient, we could use a drawing area or something - * instead of a GtkImage, so we could control the exact position of - * the pixbuf on the display, then we could queue a draw for only - * the updated area of the image. - */ - - /* We only really need to redraw if the image's animation iterator - * is gdk_pixbuf_animation_iter_on_currently_loading_frame(), but - * who cares. - */ - - gtk_widget_queue_draw (image); -} - -static gint -progressive_timeout (gpointer data) -{ - GtkWidget *image; - LoadContext *lc; - - image = GTK_WIDGET (data); - lc = get_load_context (image); - - /* This shows off fully-paranoid error handling, so looks scary. - * You could factor out the error handling code into a nice separate - * function to make things nicer. - */ - - if (lc->image_stream) - { - size_t bytes_read; - guchar buf[256]; - GError *error = NULL; - - bytes_read = fread (buf, 1, 256, lc->image_stream); - - if (ferror (lc->image_stream)) - { - GtkWidget *dialog; - - dialog = gtk_message_dialog_new (GTK_WINDOW (lc->window), - GTK_DIALOG_DESTROY_WITH_PARENT, - GTK_MESSAGE_ERROR, - GTK_BUTTONS_CLOSE, - "Failure reading image file 'alphatest.png': %s", - g_strerror (errno)); - - g_signal_connect (dialog, "response", - G_CALLBACK (gtk_widget_destroy), NULL); - - fclose (lc->image_stream); - lc->image_stream = NULL; - - gtk_widget_show (dialog); - - lc->load_timeout = 0; - - return FALSE; /* uninstall the timeout */ - } - - if (!gdk_pixbuf_loader_write (lc->pixbuf_loader, - buf, bytes_read, - &error)) - { - GtkWidget *dialog; - - dialog = gtk_message_dialog_new (GTK_WINDOW (lc->window), - GTK_DIALOG_DESTROY_WITH_PARENT, - GTK_MESSAGE_ERROR, - GTK_BUTTONS_CLOSE, - "Failed to load image: %s", - error->message); - - g_error_free (error); - - g_signal_connect (dialog, "response", - G_CALLBACK (gtk_widget_destroy), NULL); - - fclose (lc->image_stream); - lc->image_stream = NULL; - - gtk_widget_show (dialog); - - lc->load_timeout = 0; - - return FALSE; /* uninstall the timeout */ - } - - if (feof (lc->image_stream)) - { - fclose (lc->image_stream); - lc->image_stream = NULL; - - /* Errors can happen on close, e.g. if the image - * file was truncated we'll know on close that - * it was incomplete. - */ - error = NULL; - if (!gdk_pixbuf_loader_close (lc->pixbuf_loader, - &error)) - { - GtkWidget *dialog; - - dialog = gtk_message_dialog_new (GTK_WINDOW (lc->window), - GTK_DIALOG_DESTROY_WITH_PARENT, - GTK_MESSAGE_ERROR, - GTK_BUTTONS_CLOSE, - "Failed to load image: %s", - error->message); - - g_error_free (error); - - g_signal_connect (dialog, "response", - G_CALLBACK (gtk_widget_destroy), NULL); - - gtk_widget_show (dialog); - - g_object_unref (lc->pixbuf_loader); - lc->pixbuf_loader = NULL; - - lc->load_timeout = 0; - - return FALSE; /* uninstall the timeout */ - } - - g_object_unref (lc->pixbuf_loader); - lc->pixbuf_loader = NULL; - } - } - else - { - lc->image_stream = fopen (lc->filename, "r"); - - if (lc->image_stream == NULL) - { - GtkWidget *dialog; - - dialog = gtk_message_dialog_new (GTK_WINDOW (lc->window), - GTK_DIALOG_DESTROY_WITH_PARENT, - GTK_MESSAGE_ERROR, - GTK_BUTTONS_CLOSE, - "Unable to open image file '%s': %s", - lc->filename, - g_strerror (errno)); - - g_signal_connect (dialog, "response", - G_CALLBACK (gtk_widget_destroy), NULL); - - gtk_widget_show (dialog); - - lc->load_timeout = 0; - - return FALSE; /* uninstall the timeout */ - } - - if (lc->pixbuf_loader) - { - gdk_pixbuf_loader_close (lc->pixbuf_loader, NULL); - g_object_unref (lc->pixbuf_loader); - lc->pixbuf_loader = NULL; - } - - lc->pixbuf_loader = gdk_pixbuf_loader_new (); - - g_signal_connect (lc->pixbuf_loader, "area_prepared", - G_CALLBACK (progressive_prepared_callback), image); - g_signal_connect (lc->pixbuf_loader, "area_updated", - G_CALLBACK (progressive_updated_callback), image); - } - - /* leave timeout installed */ - return TRUE; -} - -static void -start_progressive_loading (GtkWidget *image) -{ - LoadContext *lc; - - lc = get_load_context (image); - - /* This is obviously totally contrived (we slow down loading - * on purpose to show how incremental loading works). - * The real purpose of incremental loading is the case where - * you are reading data from a slow source such as the network. - * The timeout simply simulates a slow data source by inserting - * pauses in the reading process. - */ - lc->load_timeout = gdk_threads_add_timeout (100, - progressive_timeout, - image); -} - -static GtkWidget * -do_image (const char *filename) -{ - GtkWidget *frame; - GtkWidget *vbox; - GtkWidget *image; - GtkWidget *label; - GtkWidget *align; - GtkWidget *window; - gchar *str, *escaped; - LoadContext *lc; - - window = gtk_window_new (GTK_WINDOW_TOPLEVEL); - gtk_window_set_title (GTK_WINDOW (window), "Image Loading"); - - gtk_container_set_border_width (GTK_CONTAINER (window), 8); - - vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8); - gtk_container_set_border_width (GTK_CONTAINER (vbox), 8); - gtk_container_add (GTK_CONTAINER (window), vbox); - - label = gtk_label_new (NULL); - gtk_label_set_line_wrap (GTK_LABEL (label), TRUE); - escaped = g_markup_escape_text (filename, -1); - str = g_strdup_printf ("Progressively loading: <b>%s</b>", escaped); - gtk_label_set_markup (GTK_LABEL (label), - str); - g_free (escaped); - g_free (str); - - gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0); - - frame = gtk_frame_new (NULL); - gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN); - /* The alignment keeps the frame from growing when users resize - * the window - */ - align = gtk_alignment_new (0.5, 0.5, 0, 0); - gtk_container_add (GTK_CONTAINER (align), frame); - gtk_box_pack_start (GTK_BOX (vbox), align, FALSE, FALSE, 0); - - image = gtk_image_new_from_pixbuf (NULL); - gtk_container_add (GTK_CONTAINER (frame), image); - - lc = get_load_context (image); - - lc->window = window; - lc->filename = g_strdup (filename); - - start_progressive_loading (image); - - g_signal_connect (window, "destroy", - G_CALLBACK (gtk_main_quit), NULL); - - g_signal_connect (window, "delete_event", - G_CALLBACK (gtk_main_quit), NULL); - - gtk_widget_show_all (window); - - return window; -} - -static void -do_nonprogressive (const gchar *filename) -{ - GtkWidget *frame; - GtkWidget *vbox; - GtkWidget *image; - GtkWidget *label; - GtkWidget *align; - GtkWidget *window; - gchar *str, *escaped; - - window = gtk_window_new (GTK_WINDOW_TOPLEVEL); - gtk_window_set_title (GTK_WINDOW (window), "Animation"); - - gtk_container_set_border_width (GTK_CONTAINER (window), 8); - - vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8); - gtk_container_set_border_width (GTK_CONTAINER (vbox), 8); - gtk_container_add (GTK_CONTAINER (window), vbox); - - label = gtk_label_new (NULL); - gtk_label_set_line_wrap (GTK_LABEL (label), TRUE); - escaped = g_markup_escape_text (filename, -1); - str = g_strdup_printf ("Loaded from file: <b>%s</b>", escaped); - gtk_label_set_markup (GTK_LABEL (label), - str); - g_free (escaped); - g_free (str); - - gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0); - - frame = gtk_frame_new (NULL); - gtk_frame_set_shadow_type (GTK_FRAME (frame), GTK_SHADOW_IN); - /* The alignment keeps the frame from growing when users resize - * the window - */ - align = gtk_alignment_new (0.5, 0.5, 0, 0); - gtk_container_add (GTK_CONTAINER (align), frame); - gtk_box_pack_start (GTK_BOX (vbox), align, FALSE, FALSE, 0); - - image = gtk_image_new_from_file (filename); - gtk_container_add (GTK_CONTAINER (frame), image); - - g_signal_connect (window, "destroy", - G_CALLBACK (gtk_main_quit), NULL); - - g_signal_connect (window, "delete_event", - G_CALLBACK (gtk_main_quit), NULL); - - gtk_widget_show_all (window); -} - -int -main (int argc, - char **argv) -{ - gint i; - - gtk_init (&argc, &argv); - - i = 1; - while (i < argc) - { - do_image (argv[i]); - do_nonprogressive (argv[i]); - - ++i; - } - - gtk_main (); - - return 0; -} - |