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