FilterManager: allow specifying custom fbprops in renderSceneInto

Fixes #599

direct/src/filter/FilterManager.py

@@ -124,7 +124,7 @@ class FilterManager(DirectObject):
 
         return winx,winy
 
-    def renderSceneInto(self, depthtex=None, colortex=None, auxtex=None, auxbits=0, textures=None):
+    def renderSceneInto(self, depthtex=None, colortex=None, auxtex=None, auxbits=0, textures=None, fbprops=None):
 
         """ Causes the scene to be rendered into the supplied textures
         instead of into the original window.  Puts a fullscreen quad
@@ -185,7 +185,10 @@ class FilterManager(DirectObject):
         # Choose the size of the offscreen buffer.
 
         (winx, winy) = self.getScaledSize(1,1,1)
-        buffer = self.createBuffer("filter-base", winx, winy, texgroup)
+        if fbprops is not None:
+            buffer = self.createBuffer("filter-base", winx, winy, texgroup, fbprops=fbprops)
+        else:
+            buffer = self.createBuffer("filter-base", winx, winy, texgroup)
 
         if (buffer == None):
             return None
@@ -287,7 +290,7 @@ class FilterManager(DirectObject):
 
         return quad
 
-    def createBuffer(self, name, xsize, ysize, texgroup, depthbits=1):
+    def createBuffer(self, name, xsize, ysize, texgroup, depthbits=1, fbprops=None):
         """ Low-level buffer creation.  Not intended for public use. """
 
         winprops = WindowProperties()
@@ -297,6 +300,9 @@ class FilterManager(DirectObject):
         props.setRgbColor(1)
         props.setDepthBits(depthbits)
         props.setStereo(self.win.isStereo())
+        if fbprops is not None:
+            props.addProperties(fbprops)
+
         depthtex, colortex, auxtex0, auxtex1 = texgroup
         if (auxtex0 != None):
             props.setAuxRgba(1)