Attachment 12718 Details for Bug 1955 – Simple GL test program

Simple GL test program

gtkgl.c (text/x-csrc), 6.48 KB, created by Antti P Miettinen on 2007-11-25 12:02:09 UTC

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Filename:

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Creator: Antti P Miettinen

Created: 2007-11-25 12:02:09 UTC

Size: 6.48 KB

patch

obsolete

>#include <GL/gl.h>
>#include <GL/glu.h>
>
>#include <gtk/gtk.h>
>#include <gtk/gtkgl.h>
>
>GdkGLConfig *glconfig = 0;
>
>static GLfloat ambient[4] = {
>    0.2,
>    0.2,
>    0.2,
>    1.0
>};
>static GLfloat diffuse[4] = {
>    0.8,
>    0.8,
>    0.8,
>    1.0
>};
>static GLfloat specular[4] = {
>    0.0,
>    0.0,
>    0.0,
>    1.0
>};
>static GLfloat emission[4] = {
>    0.0,
>    0.0,
>    0.0,
>    1.0
>};
>static GLfloat shininess = 0;
>static GLfloat light_diffuse[4] = {
>    1.0,
>    1.0,
>    1.0,
>    1.0
>};
>static GLfloat light_position[] = {
>    1.0,
>    1.0,
>    1.0,
>    0.0
>};
>
>GtkWidget*
>create_area(gchar *widget_name,
>	    gchar *string1,
>	    gchar *string2,
>	    gint int1,
>	    gint int2)
>{
>    GtkWidget *drawing_area = gtk_drawing_area_new();
>    gtk_widget_set_gl_capability(drawing_area,
>				 glconfig,
>				 NULL,
>				 TRUE,
>				 GDK_GL_RGBA_TYPE);  
>    return drawing_area;
>}
>
>gboolean
>on_window_delete_event(GtkWidget *widget,
>		       GdkEvent *event,
>		       gpointer user_data)
>{
>    g_print("Goodbye!\n");
>    gtk_main_quit();
>    return FALSE;
>}
>
>gboolean
>on_custom_configure_event(GtkWidget *widget,
>			  GdkEventConfigure *event,
>			  gpointer user_data)
>{
>    GLsizei sz;
>    GdkGLContext *glcontext = gtk_widget_get_gl_context(widget);
>    GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(widget);
>
>    if (!gdk_gl_drawable_gl_begin (gldrawable, glcontext))
>	return FALSE;
>
>    if (widget->allocation.width > widget->allocation.height)
>	sz = widget->allocation.height;
>    else
>	sz = widget->allocation.width;
>    glViewport (0, 0, sz, sz);
>
>    gdk_gl_drawable_gl_end (gldrawable);
>
>    return TRUE;
>}
>
>gboolean
>on_custom_expose_event(GtkWidget *widget,
>		       GdkEventExpose *event,
>		       gpointer user_data)
>{
>    GLsizei sz;
>    GLUquadricObj *qobj;
>    GdkGLContext *glcontext = gtk_widget_get_gl_context(widget);
>    GdkGLDrawable *gldrawable = gtk_widget_get_gl_drawable(widget);
>
>    if (!gdk_gl_drawable_gl_begin(gldrawable, glcontext))
>	return FALSE;
>
>    if (widget->allocation.width > widget->allocation.height)
>	sz = widget->allocation.height;
>    else
>	sz = widget->allocation.width;
>    glViewport(0, 0, sz, sz);
>
>    glClearColor(0.0, 0.0, 0.0, 1.0);
>    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
>
>    glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse);
>    glLightfv(GL_LIGHT0, GL_POSITION, light_position);
>    glEnable(GL_LIGHTING);
>    glEnable(GL_COLOR_MATERIAL);
>    glEnable(GL_CULL_FACE);
>    glEnable(GL_LIGHT0);
>    glEnable(GL_DEPTH_TEST);
>    glClearColor(1.0, 1.0, 1.0, 1.0);
>    glClearDepth(1.0);
>
>    glMatrixMode(GL_PROJECTION);
>    glLoadIdentity();
>    gluPerspective(40.0, 1.0, 1.0, 10.0);
>
>    glMatrixMode(GL_MODELVIEW);
>    glLoadIdentity();
>    gluLookAt(0.0, 0.0, 3.0,
>	      0.0, 0.0, 0.0,
>	      0.0, 1.0, 0.0);
>    glTranslatef(0.0, 0.0, -3.0);
>
>    glMaterialfv(GL_FRONT, GL_AMBIENT, ambient);
>    glMaterialfv(GL_FRONT, GL_DIFFUSE, diffuse);
>    glMaterialfv(GL_FRONT, GL_SPECULAR, specular);
>    glMaterialfv(GL_FRONT, GL_EMISSION, emission);
>    glMaterialf(GL_FRONT, GL_SHININESS, shininess);
>
>    qobj = gluNewQuadric ();
>    gluQuadricDrawStyle (qobj, GLU_FILL);
>    gluSphere (qobj, 1.0, 20, 20);
>    gluDeleteQuadric(qobj);
>
>    if (gdk_gl_drawable_is_double_buffered (gldrawable))
>    {
>	printf("swapping buffers\n");
>	gdk_gl_drawable_swap_buffers (gldrawable);
>    }
>    else
>    {
>	printf("glFlushing\n");
>	glFlush ();
>    }
>
>    gdk_gl_drawable_gl_end (gldrawable);
>
>    return TRUE;
>}
>
>#define GLADE_HOOKUP_OBJECT(component,widget,name) \
>  g_object_set_data_full (G_OBJECT (component), name, \
>    gtk_widget_ref (widget), (GDestroyNotify) gtk_widget_unref)
>
>#define GLADE_HOOKUP_OBJECT_NO_REF(component,widget,name) \
>  g_object_set_data (G_OBJECT (component), name, widget)
>
>GtkWidget*
>create_window(void)
>{
>    GtkWidget *window;
>    GtkWidget *custom;
>    GtkWidget *hbox;
>    GtkWidget *vbox;
>    GtkWidget *button1;
>    GtkWidget *button2;
>    GtkWidget *button3;
>
>    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
>    gtk_window_set_title(GTK_WINDOW(window), "gtkgl");
>
>    hbox = gtk_hbox_new(FALSE, 0);
>    gtk_widget_show(hbox);
>    gtk_container_add(GTK_CONTAINER(window), hbox);
>
>    custom = create_area("custom", NULL, NULL, 0, 0);
>    gtk_widget_show(custom);
>    gtk_box_pack_start(GTK_BOX(hbox), custom, TRUE, TRUE, 0);
>    gtk_widget_set_size_request(custom, 200, 200);
>    GTK_WIDGET_SET_FLAGS(custom, GTK_APP_PAINTABLE);
>    GTK_WIDGET_UNSET_FLAGS(custom, GTK_CAN_FOCUS);
>    GTK_WIDGET_UNSET_FLAGS(custom, GTK_CAN_DEFAULT);
>    GTK_WIDGET_UNSET_FLAGS(custom, GTK_DOUBLE_BUFFERED);
>    gtk_widget_set_events(custom,
>			  GDK_EXPOSURE_MASK
>			  | GDK_POINTER_MOTION_MASK
>			  | GDK_POINTER_MOTION_HINT_MASK
>			  | GDK_BUTTON_MOTION_MASK
>			  | GDK_BUTTON_PRESS_MASK
>			  | GDK_BUTTON_RELEASE_MASK);
>
>    vbox = gtk_vbox_new(FALSE, 0);
>    gtk_widget_show(vbox);
>    gtk_box_pack_start(GTK_BOX(hbox), vbox, FALSE, FALSE, 0);
>
>    button1 = gtk_button_new_with_mnemonic("Reset");
>    gtk_widget_show(button1);
>    gtk_box_pack_start(GTK_BOX(vbox), button1, FALSE, FALSE, 0);
>
>    button2 = gtk_button_new_with_mnemonic("Iterate");
>    gtk_widget_show(button2);
>    gtk_box_pack_start(GTK_BOX(vbox), button2, FALSE, FALSE, 0);
>
>    button3 = gtk_button_new_with_mnemonic("Zoom");
>    gtk_widget_show(button3);
>    gtk_box_pack_start(GTK_BOX(vbox), button3, FALSE, FALSE, 0);
>
>    g_signal_connect((gpointer)window, "delete_event",
>		     G_CALLBACK(on_window_delete_event),
>		     NULL);
>    g_signal_connect((gpointer) custom, "expose_event",
>		     G_CALLBACK(on_custom_expose_event),
>		     NULL);
>    g_signal_connect((gpointer) custom, "configure_event",
>		     G_CALLBACK(on_custom_configure_event),
>		     NULL);
>
>    /* Store pointers to all widgets, for use by lookup_widget(). */
>    GLADE_HOOKUP_OBJECT_NO_REF(window, window, "window");
>    GLADE_HOOKUP_OBJECT(window, hbox, "hbox");
>    GLADE_HOOKUP_OBJECT(window, custom, "custom");
>    GLADE_HOOKUP_OBJECT(window, vbox, "vbox");
>    GLADE_HOOKUP_OBJECT(window, button1, "button1");
>    GLADE_HOOKUP_OBJECT(window, button2, "button2");
>    GLADE_HOOKUP_OBJECT(window, button3, "button3");
>
>    return window;
>}
>
>int main(int ac, char **av)
>{
>    GtkWidget *window;
>
>    gtk_set_locale();
>    gtk_init(&ac, &av);
>    gtk_gl_init(&ac, &av);
>
>    /* Try double-buffered visual */
>    glconfig = gdk_gl_config_new_by_mode(GDK_GL_MODE_RGB
>					 | GDK_GL_MODE_DEPTH
>					 | GDK_GL_MODE_DOUBLE);
>    if (!glconfig)
>    {
>	g_print ("No OpenGL-capable visual found.\n");
>	return 1;
>    }
>
>    window = create_window();
>    gtk_widget_show(window);
>    gtk_main();
>
>    return 0;
>}

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Attachments on bug 1955: 12718

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