/* OpenGL/Shadertoy * * Generate pixels using a custom fragment shader. * * The names of the uniforms are compatible with the shaders on shadertoy.com, so * many of the shaders there work here too. */ #include #include #include #include "gtkshadertoy.h" static GtkWidget *demo_window = NULL; static GtkWidget *shadertoy = NULL; static GtkTextBuffer *textbuffer = NULL; static void run (void) { GtkTextIter start, end; char *text; gtk_text_buffer_get_bounds (textbuffer, &start, &end); text = gtk_text_buffer_get_text (textbuffer, &start, &end, FALSE); gtk_shadertoy_set_image_shader (GTK_SHADERTOY (shadertoy), text); g_free (text); } static void run_clicked_cb (GtkWidget *button, gpointer user_data) { run (); } static void load_clicked_cb (GtkWidget *button, gpointer user_data) { const char *path = user_data; GBytes *initial_shader; initial_shader = g_resources_lookup_data (path, 0, NULL); gtk_text_buffer_set_text (textbuffer, g_bytes_get_data (initial_shader, NULL), -1); g_bytes_unref (initial_shader); run (); } static void clear_clicked_cb (GtkWidget *button, gpointer user_data) { gtk_text_buffer_set_text (textbuffer, "", 0); } static void close_window (GtkWidget *widget) { /* Reset the state */ demo_window = NULL; shadertoy = NULL; textbuffer = NULL; } static GtkWidget * new_shadertoy (const char *path) { GBytes *shader; GtkWidget *toy; toy = gtk_shadertoy_new (); shader = g_resources_lookup_data (path, 0, NULL); gtk_shadertoy_set_image_shader (GTK_SHADERTOY (toy), g_bytes_get_data (shader, NULL)); g_bytes_unref (shader); return toy; } static GtkWidget * new_button (const char *path) { GtkWidget *button, *toy; button = gtk_button_new (); g_signal_connect (button, "clicked", G_CALLBACK (load_clicked_cb), (char *)path); toy = new_shadertoy (path); gtk_widget_set_size_request (toy, 64, 36); gtk_button_set_child (GTK_BUTTON (button), toy); return button; } static GtkWidget * create_shadertoy_window (GtkWidget *do_widget) { GtkWidget *window, *box, *hbox, *button, *textview, *sw, *aspect, *centerbox; window = gtk_window_new (); gtk_window_set_display (GTK_WINDOW (window), gtk_widget_get_display (do_widget)); gtk_window_set_title (GTK_WINDOW (window), "Shadertoy"); gtk_window_set_default_size (GTK_WINDOW (window), 640, 600); g_signal_connect (window, "destroy", G_CALLBACK (close_window), NULL); box = gtk_box_new (GTK_ORIENTATION_VERTICAL, FALSE); gtk_widget_set_margin_start (box, 12); gtk_widget_set_margin_end (box, 12); gtk_widget_set_margin_top (box, 12); gtk_widget_set_margin_bottom (box, 12); gtk_box_set_spacing (GTK_BOX (box), 6); gtk_window_set_child (GTK_WINDOW (window), box); aspect = gtk_aspect_frame_new (0.5, 0.5, 1.77777, FALSE); gtk_widget_set_hexpand (aspect, TRUE); gtk_widget_set_vexpand (aspect, TRUE); gtk_box_append (GTK_BOX (box), aspect); shadertoy = new_shadertoy ("/shadertoy/alienplanet.glsl"); gtk_aspect_frame_set_child (GTK_ASPECT_FRAME (aspect), shadertoy); sw = gtk_scrolled_window_new (); gtk_scrolled_window_set_min_content_height (GTK_SCROLLED_WINDOW (sw), 250); gtk_scrolled_window_set_has_frame (GTK_SCROLLED_WINDOW (sw), TRUE); gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw), GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC); gtk_widget_set_hexpand (sw, TRUE); gtk_box_append (GTK_BOX (box), sw); textview = gtk_text_view_new (); gtk_text_view_set_monospace (GTK_TEXT_VIEW (textview), TRUE); gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), textview); textbuffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (textview)); gtk_text_buffer_set_text (textbuffer, gtk_shadertoy_get_image_shader (GTK_SHADERTOY (shadertoy)), -1); centerbox = gtk_center_box_new (); gtk_box_append (GTK_BOX (box), centerbox); hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, FALSE); gtk_box_set_spacing (GTK_BOX (hbox), 6); gtk_center_box_set_start_widget (GTK_CENTER_BOX (centerbox), hbox); button = gtk_button_new_from_icon_name ("media-playback-start-symbolic"); g_signal_connect (button, "clicked", G_CALLBACK (run_clicked_cb), NULL); gtk_box_append (GTK_BOX (hbox), button); button = gtk_button_new_from_icon_name ("edit-clear-all-symbolic"); g_signal_connect (button, "clicked", G_CALLBACK (clear_clicked_cb), NULL); gtk_box_append (GTK_BOX (hbox), button); hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, FALSE); gtk_box_set_spacing (GTK_BOX (hbox), 6); gtk_center_box_set_end_widget (GTK_CENTER_BOX (centerbox), hbox); button = new_button ("/shadertoy/alienplanet.glsl"); gtk_box_append (GTK_BOX (hbox), button); button = new_button ("/shadertoy/mandelbrot.glsl"); gtk_box_append (GTK_BOX (hbox), button); button = new_button ("/shadertoy/neon.glsl"); gtk_box_append (GTK_BOX (hbox), button); button = new_button ("/shadertoy/cogs.glsl"); gtk_box_append (GTK_BOX (hbox), button); button = new_button ("/shadertoy/glowingstars.glsl"); gtk_box_append (GTK_BOX (hbox), button); return window; } GtkWidget * do_shadertoy (GtkWidget *do_widget) { if (!demo_window) demo_window = create_shadertoy_window (do_widget); if (!gtk_widget_get_visible (demo_window)) gtk_widget_show (demo_window); else gtk_window_destroy (GTK_WINDOW (demo_window)); return demo_window; }