Fix hatching with no edges in PS backend.

Also, clean up some redundancies; 72 -> sidelen and the setpattern operator simplifies setting the pattern.
matplotlib · NelleV · Nov 14, 2016 · Nov 7, 2016 · Nov 8, 2016 · Nov 9, 2016
commit f2853bd696c39c63fb2020ce4766173a5d7f6b9b
diff --git a/lib/matplotlib/backends/backend_ps.py b/lib/matplotlib/backends/backend_ps.py
@@ -318,10 +318,10 @@ def create_hatch(self, hatch):
        %(linewidth)f setlinewidth
 """ % locals())
        self._pswriter.write(
-            self._convert_path(Path.hatch(hatch), Affine2D().scale(72.0),
+            self._convert_path(Path.hatch(hatch), Affine2D().scale(sidelen),
                               simplify=False))
        self._pswriter.write("""\
-          stroke
+        stroke
     } bind
   >>
   matrix
@@ -861,6 +861,7 @@ def _draw_ps(self, ps, gc, rgbFace, fill=True, stroke=True, command=None):
        stroke = stroke and mightstroke
        fill = (fill and rgbFace is not None and
                (len(rgbFace) <= 3 or rgbFace[3] != 0.0))
+        hatch = gc.get_hatch()

        if mightstroke:
            self.set_linewidth(gc.get_linewidth())
@@ -886,19 +887,18 @@ def _draw_ps(self, ps, gc, rgbFace, fill=True, stroke=True, command=None):
        write("\n")

        if fill:
-            if stroke:
+            if stroke or hatch:
                write("gsave\n")
            self.set_color(store=0, *rgbFace[:3])
            write("fill\n")
-            if stroke:
+            if stroke or hatch:
                write("grestore\n")

-        hatch = gc.get_hatch()
        if hatch:
            hatch_name = self.create_hatch(hatch)
            write("gsave\n")
-            write("[/Pattern [/DeviceRGB]] setcolorspace %f %f %f " % gc.get_hatch_color()[:3])
-            write("%s setcolor fill grestore\n" % hatch_name)
+            write("%f %f %f " % gc.get_hatch_color()[:3])
+            write("%s setpattern fill grestore\n" % hatch_name)

        if stroke:
            write("stroke\n")