Question

我一直在研究如何混合使用gtk3和opengl，在gtk2中你可以使用gtkglext，但这并没有打包任何意味着任何开发的软件都不会最终存在于软件存储库中。

Answer 1

管理将它拼凑在一起似乎在ubuntu 13.04上的两台笔记本电脑上进行了相当好的测试，在这里发布，因为我将来需要它：）

#!/usr/bin/env python
# [SNIPPET_NAME: gtk3 opengl example]
# [SNIPPET_CATEGORIES: opengl]
# [SNIPPET_TAGS: opengl, gtk3]
# [SNIPPET_DESCRIPTION: using gtk3 library lets draw using opengl]
# [SNIPPET_AUTHOR: Oliver Marks ]
# [SNIPPET_LICENSE: GPL]

import sys
from OpenGL.GL import *
from OpenGL.GLU import *
from OpenGL import GLX
from OpenGL.raw._GLX import struct__XDisplay
from OpenGL import GL
from ctypes import *

import Xlib
from Xlib.display import Display
from gi.repository import Gtk, GdkX11, Gdk


class gtkgl:
    """ these method do not seem to exist in python x11 library lets exploit the c methods """
    xlib = cdll.LoadLibrary('libX11.so')
    xlib.XOpenDisplay.argtypes = [c_char_p]
    xlib.XOpenDisplay.restype = POINTER(struct__XDisplay)
    xdisplay = xlib.XOpenDisplay("")
    display = Xlib.display.Display()
    attrs = []

    xwindow_id = None
    width = height = 200

    def __init__(self):
        """ lets setup are opengl settings and create the context for our window """
        self.add_attribute(GLX.GLX_RGBA, True)
        self.add_attribute(GLX.GLX_RED_SIZE, 1)
        self.add_attribute(GLX.GLX_GREEN_SIZE, 1)
        self.add_attribute(GLX.GLX_BLUE_SIZE, 1)
        self.add_attribute(GLX.GLX_DOUBLEBUFFER, 0)

        xvinfo = GLX.glXChooseVisual(self.xdisplay, self.display.get_default_screen(), self.get_attributes())
        configs = GLX.glXChooseFBConfig(self.xdisplay, 0, None, byref(c_int()))
        self.context = GLX.glXCreateContext(self.xdisplay, xvinfo, None, True)

    def add_attribute(self, setting, value):
        """just to nicely add opengl parameters"""
        self.attrs.append(setting)
        self.attrs.append(value)

    def get_attributes(self):
        """ return our parameters in the expected structure"""
        attrs = self.attrs + [0, 0]
        return (c_int * len(attrs))(*attrs)

    def configure(self, wid):
        """  """
        self.xwindow_id = GdkX11.X11Window.get_xid(wid)
        if(not GLX.glXMakeCurrent(self.xdisplay, self.xwindow_id, self.context)):
            print 'failed'
        glViewport(0, 0, self.width, self.height)

    def draw_start(self):
        """make cairo context current for drawing"""
        if(not GLX.glXMakeCurrent(self.xdisplay, self.xwindow_id, self.context)):
            print "failed"

    def draw_finish(self):
        """swap buffer when we have finished drawing"""
        GLX.glXSwapBuffers(self.xdisplay, self.xwindow_id)

    def test(self):
        """Test method to draw something so we can make sure opengl is working and we can see something"""
        self.draw_start()

        glClearColor(0.0, 0.0, 0.0, 0.0)
        glClear(GL_COLOR_BUFFER_BIT)
        glBegin(GL_TRIANGLES)
        glIndexi(0)
        glColor3f(1.0, 0.0, 0.0)
        glVertex2i(0, 1)
        glIndexi(0)
        glColor3f(0.0, 1.0, 0.0)
        glVertex2i(-1, -1)
        glIndexi(0)
        glColor3f(0.0, 0.0, 1.0)
        glVertex2i(1, -1)
        glEnd()

        self.draw_finish()


class gui():
    glwrap = gtkgl()

    def __init__(self):
        self.window = Gtk.Window()
        self.window.realize()
        self.window.resize(self.glwrap.width, self.glwrap.height)
        self.window.set_resizable(True)
        self.window.set_reallocate_redraws(True)
        self.window.set_title("GTK3 with opengl")
        self.window.connect('delete_event', Gtk.main_quit)
        self.window.connect('destroy', lambda quit: Gtk.main_quit())

        self.drawing_area = Gtk.DrawingArea()
        self.drawing_area.connect('configure_event', self.on_configure_event)
        self.drawing_area.connect('draw', self.on_draw)
        self.drawing_area.set_double_buffered(False)
        self.drawing_area.set_size_request(self.glwrap.width, self.glwrap.height)

        self.window.add(self.drawing_area)
        self.window.show_all()

    def on_configure_event(self, widget, event):
        self.glwrap.configure(widget.get_window())
        return True

    def on_draw(self, widget, context):
        self.glwrap.test()


def main():
    g = gui()
    Gtk.main()

if __name__ == '__main__':
    main()

Answer 2

您可以随时自行打包gtkglext。此外，您可能希望在Gtk +小部件层次结构中使用Clutter进行OpenGl交互。

我如何一起使用gtk3和opengl？

2 个答案: