Question

简单和简短： GTK +最先进的OpenGL绑定是什么？ 我更喜欢一个允许我使用它的小部件，类似于QGLWidget。

注意：我偶然发现了gtkglext，gtkglarea和clutter。我读了前两个有缺点/严重问题。

Answer 1

<强>更新

由于Gtk+-3.16以外的任何人不使用以下任何内容！

如果你想使用当前最先进的顶点/像素着色器，你应该使用最新的gnome并依赖它的上限：

https://www.bassi.io/articles/2015/02/17/using-opengl-with-gtk/

中广泛涵盖

好的，我在过去的2个小时里读了很多，结果是：

gtkglext 将完全用OpenGL替换后端，这不是我的意图
混乱将所有原生gl调用装入对象并且不支持原生gl调用，尽管它提供了许多预先设置的过滤器和有趣的东西

gtkglarea 似乎很好，它的设计很可爱。它与Qt中的QGLWidget具有相同的使用风格（据我所知）simple demo of gtkglarea：

#include <math.h>
#include <gtk/gtk.h>
#include <GL/gl.h>
#include <gtkgl/gtkglarea.h>

int init (GtkWidget *widget)
{
if (gtk_gl_area_make_current (GTK_GL_AREA(widget)))
  {
  glViewport(0,0, widget->allocation.width, widget->allocation.height);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity();
  glOrtho(0,100, 100,0, -1,1);
  glMatrixMode(GL_MODELVIEW);
  glLoadIdentity();
  }

return TRUE;
}

int draw (GtkWidget *widget, GdkEventExpose *event)
{
if (event->count > 0) return TRUE;

if (gtk_gl_area_make_current (GTK_GL_AREA(widget)))
  {
  glClearColor(0,0,0,1);
  glClear(GL_COLOR_BUFFER_BIT);
  glColor3f(1,1,1);
  glBegin(GL_TRIANGLES);
  glVertex2f(10,10);
  glVertex2f(10,90);
  glVertex2f(90,90);
  glEnd();
  gtk_gl_area_swap_buffers (GTK_GL_AREA(widget));
  }

return TRUE;
}

int reshape (GtkWidget *widget, GdkEventConfigure *event)
{
if (gtk_gl_area_make_current (GTK_GL_AREA(widget)))
  glViewport(0,0, widget->allocation.width, widget->allocation.height);

return TRUE;
}

int main (int argc, char **argv)
{
GtkWidget *window, *glarea;

int attrlist[] = {
GDK_GL_RGBA,
GDK_GL_RED_SIZE,1,
GDK_GL_GREEN_SIZE,1,
GDK_GL_BLUE_SIZE,1,
GDK_GL_DOUBLEBUFFER,
GDK_GL_NONE };

gtk_init (&argc, &argv);
if (gdk_gl_query () == FALSE) return 0;

window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_window_set_title (GTK_WINDOW(window), "Simple");
gtk_container_set_border_width (GTK_CONTAINER(window), 10);
g_signal_connect (window, "delete_event",
G_CALLBACK (gtk_main_quit), NULL);

/* You should always delete gtk_gl_area widgets before exit or else
   GLX contexts are left undeleted, this may cause problems (=core dump)
   in some systems.
   Destroy method of objects is not automatically called on exit.
   You need to manually enable this feature. Do gtk_quit_add_destroy()
   for all your top level windows unless you are certain that they get
   destroy signal by other means. */

gtk_quit_add_destroy (1, GTK_OBJECT(window));

glarea = GTK_WIDGET(gtk_gl_area_new (attrlist));
gtk_widget_set_size_request (GTK_WIDGET(glarea), 100, 100);

gtk_widget_set_events (GTK_WIDGET(glarea), GDK_EXPOSURE_MASK | GDK_BUTTON_PRESS_MASK);

g_signal_connect (glarea, "expose_event", G_CALLBACK(draw), NULL);
g_signal_connect (glarea, "configure_event", G_CALLBACK(reshape), NULL);
g_signal_connect (glarea, "realize", G_CALLBACK(init), NULL);

gtk_container_add (GTK_CONTAINER(window), GTK_WIDGET(glarea));
gtk_widget_show (GTK_WIDGET(glarea));
gtk_widget_show (GTK_WIDGET(window));

gtk_main ();
return 0;
}

注意：gtkglarea仍然存在一些问题，例如退出时的核心转储（至少1.99）

注2：版本2.0.1修复了此问题

编辑：对于那些只寻求2D的人来说， cairo 似乎是最合适的。

Gtk +和OpenGL绑定

1 个答案: