Add analog CRT screen afterglow emulation for gr-wxgui

[debian/gnuradio] / gr-wxgui / src / python / plotter / plotter_base.py

diff --git a/gr-wxgui/src/python/plotter/plotter_base.py b/gr-wxgui/src/python/plotter/plotter_base.py
index dede5a0ad51b8d5abbf231c02ef40634d66acd77..2fbd5fb9dbbc3368c04ba9949e25a1c21c8eb8fc 100644 (file)
--- a/gr-wxgui/src/python/plotter/plotter_base.py
+++ b/gr-wxgui/src/python/plotter/plotter_base.py
@@ -87,7 +87,10 @@ class plotter_base(wx.glcanvas.GLCanvas, common.mutex):
                @param parent the parent widgit
                """
                attribList = (wx.glcanvas.WX_GL_DOUBLEBUFFER, wx.glcanvas.WX_GL_RGBA)
-               wx.glcanvas.GLCanvas.__init__(self, parent, attribList=attribList)
+               wx.glcanvas.GLCanvas.__init__(self, parent, attribList=attribList);
+                self.emulate_analog=False
+                self.analog_alpha=2.0/15
+                self.clear_accum=True
                self._gl_init_flag = False
                self._resized_flag = True
                self._init_fcns = list()
@@ -97,6 +100,13 @@ class plotter_base(wx.glcanvas.GLCanvas, common.mutex):
                self.Bind(wx.EVT_SIZE, self._on_size)
                self.Bind(wx.EVT_ERASE_BACKGROUND, lambda e: None)
 
+        def set_emulate_analog(self,enable):
+                self.emulate_analog=enable 
+                self.clear_accum=True
+
+        def set_analog_alpha(self,analog_alpha):
+                self.analog_alpha=analog_alpha
+
        def new_gl_cache(self, draw_fcn, draw_pri=50):
                """
                Create a new gl cache.
@@ -131,6 +141,7 @@ class plotter_base(wx.glcanvas.GLCanvas, common.mutex):
                """
                self.lock()
                self._resized_flag = True
+                self.clear_accum=True
                self.unlock()
 
        def _on_paint(self, event):
@@ -160,7 +171,30 @@ class plotter_base(wx.glcanvas.GLCanvas, common.mutex):
                        self._resized_flag = False
                #clear, draw functions, swap
                GL.glClear(GL.GL_COLOR_BUFFER_BIT)
+
+                if False:
+                  GL.glEnable (GL.GL_LINE_SMOOTH)
+                  GL.glEnable (GL.GL_POLYGON_SMOOTH)
+                  GL.glEnable (GL.GL_BLEND)
+                  GL.glBlendFunc (GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA)
+                  GL.glHint (GL.GL_LINE_SMOOTH_HINT, GL.GL_NICEST) #GL.GL_DONT_CARE)
+                  GL.glHint(GL.GL_POLYGON_SMOOTH_HINT, GL.GL_NICEST)
+                  #GL.glLineWidth (1.5)
+
+                  GL.glEnable(GL.GL_MULTISAMPLE) #Enable Multisampling anti-aliasing
+
+
                for fcn in self._draw_fcns: fcn[1]()
+
+                if self.emulate_analog:
+                  if self.clear_accum:
+                    #GL.glClear(GL.GL_ACCUM_BUFFER_BIT)
+                    GL.glAccum(GL.GL_LOAD, 1.0)
+                    self.clear_accum=False
+
+                  GL.glAccum(GL.GL_MULT, 1.0-self.analog_alpha)
+                  GL.glAccum(GL.GL_ACCUM, self.analog_alpha)
+                  GL.glAccum(GL.GL_RETURN, 1.0)
                self.SwapBuffers()
                self.unlock()