class GLDrawingArea(GLWindowBackingBase):
def __repr__(self):
return "gtk%i.GLDrawingArea(%s, %s, %s)" % (
gtk_version(), self.wid, self.size, self.pixel_format)
def idle_add(self, *args, **kwargs):
glib.idle_add(*args, **kwargs)
def init_gl_config(self, window_alpha):
self.context = GLContext(window_alpha)
self.window_context = None
def is_double_buffered(self):
return self.context.is_double_buffered()
def init_backing(self):
da = gtk.DrawingArea()
#da.connect('configure_event', self.on_configure_event)
#da.connect('draw', self.on_draw)
#double-buffering is enabled by default anyway, so this is redundant:
#da.set_double_buffered(True)
da.set_size_request(*self.size)
da.set_events(da.get_events() | POINTER_MOTION_MASK
| POINTER_MOTION_HINT_MASK)
da.show()
self._backing = da
def get_bit_depth(self, pixel_depth):
return self.context.get_bit_depth() or pixel_depth or 24
def gl_context(self):
b = self._backing
if not b:
return None
gdk_window = b.get_window()
assert gdk_window
self.window_context = self.context.get_paint_context(gdk_window)
return self.window_context
def do_gl_show(self, _rect_count):
if self.is_double_buffered():
# Show the backbuffer on screen
log("%s.gl_show() swapping buffers now", self)
self.window_context.swap_buffers()
else:
#glFlush was enough
pass
def close(self):
GLWindowBackingBase.close(self)
c = self.context
if c:
self.context = None
c.destroy()
def cairo_draw(self, _context):
w, h = self.size
with self.gl_context():
self.gl_init()
self.present_fbo(0, 0, w, h)
class GLDrawingArea(GLWindowBackingBase):
def __init__(self, wid: int, window_alpha: bool, pixel_depth: int = 0):
self.on_realize_cb = []
super().__init__(wid, window_alpha, pixel_depth)
def __repr__(self):
return "GLDrawingArea(%s, %s, %s)" % (self.wid, self.size,
self.pixel_format)
def idle_add(self, *args, **kwargs):
GLib.idle_add(*args, **kwargs)
def init_gl_config(self):
self.context = GLContext(self._alpha_enabled) #pylint: disable=not-callable
self.window_context = None
def is_double_buffered(self):
return self.context.is_double_buffered()
def init_backing(self):
da = Gtk.DrawingArea()
da.connect_after("realize", self.on_realize)
#da.connect('configure_event', self.on_configure_event)
#da.connect('draw', self.on_draw)
#double-buffering is enabled by default anyway, so this is redundant:
#da.set_double_buffered(True)
da.set_size_request(*self.size)
da.set_events(da.get_events() | Gdk.EventMask.POINTER_MOTION_MASK
| Gdk.EventMask.POINTER_MOTION_HINT_MASK)
da.show()
self._backing = da
def on_realize(self, *args):
onrcb = self.on_realize_cb
log("GLDrawingArea.on_realize%s callbacks=%s", args, onrcb)
self.on_realize_cb = []
gl_context = self.gl_context()
with gl_context:
for x, args in onrcb:
try:
x(gl_context, *args)
except Exception:
log.error("Error calling realize callback %s",
x,
exc_info=True)
def with_gl_context(self, cb, *args):
da = self._backing
if da and da.get_mapped():
gl_context = self.gl_context()
if gl_context:
with gl_context:
cb(gl_context, *args)
else:
cb(None, *args)
else:
log("GLDrawingArea.with_gl_context delayed: %s%s", cb,
ellipsizer(args))
self.on_realize_cb.append((cb, args))
def get_bit_depth(self, pixel_depth=0):
return pixel_depth or self.context.get_bit_depth() or 24
def gl_context(self):
b = self._backing
if not b:
return None
gdk_window = b.get_window()
if not gdk_window:
raise Exception("backing %s does not have a gdk window!" % b)
self.window_context = self.context.get_paint_context(gdk_window)
return self.window_context
def do_gl_show(self, rect_count):
if self.is_double_buffered():
# Show the backbuffer on screen
log("%s.do_gl_show(%s) swapping buffers now", rect_count, self)
self.window_context.swap_buffers()
else:
#glFlush was enough
pass
def close_gl_config(self):
c = self.context
if c:
self.context = None
c.destroy()
def draw_fbo(self, _context):
w, h = self.size
with self.gl_context():
self.gl_init()
self.present_fbo(0, 0, w, h)