Support linewidth attribute in PIL back end

- bump requirement for pillow>=9.2.0

doc/WhatsNew.rst

@@ -5,6 +5,10 @@ What's New
 Ver 5.0.0 (unreleased)
 ======================
 - Add Contrast and Brightness adjustments in "Preferences" plugin
+- Modifications to PIL backend
+
+  - support pillow v10.0
+  - now supports linewidth attribute
 
 Ver 4.1.0 (2022-06-30)
 ======================

ginga/pilw/CanvasRenderPil.py

@@ -30,10 +30,11 @@ def __init__(self, renderer, viewer, surface):
         self.font = None
 
     def set_line_from_shape(self, shape):
-        # TODO: support line width and style
+        # TODO: support line style
         alpha = getattr(shape, 'alpha', 1.0)
         color = getattr(shape, 'color', 'black')
-        self.pen = self.cr.get_pen(color, alpha=alpha)
+        linewidth = getattr(shape, 'linewidth', 1)
+        self.pen = self.cr.get_pen(color, linewidth=linewidth, alpha=alpha)
 
     def set_fill_from_shape(self, shape):
         fill = getattr(shape, 'fill', False)
@@ -71,8 +72,8 @@ def initialize_from_shape(self, shape, line=True, fill=True, font=True):
             self.set_font_from_shape(shape)
 
     def set_line(self, color, alpha=1.0, linewidth=1, style='solid'):
-        # TODO: support line width and style
-        self.pen = self.cr.get_pen(color, alpha=alpha)
+        # TODO: support line style
+        self.pen = self.cr.get_pen(color, linewidth=linewidth, alpha=alpha)
 
     def set_fill(self, color, alpha=1.0):
         if color is None:

ginga/pilw/PilHelp.py

@@ -158,19 +158,21 @@ def circle(self, pt, radius, pen, brush):
         if (brush is not None) and brush.fill:
             self.ctx.ellipse(((x - radius, y - radius),
                               (x + radius, y + radius)),
-                             fill=brush.color, outline=pen.color)
+                             fill=brush.color, outline=pen.color,
+                             width=pen.linewidth)
         else:
             self.ctx.ellipse(((x - radius, y - radius),
                               (x + radius, y + radius)),
-                             outline=pen.color)
+                             outline=pen.color, width=pen.linewidth)
 
     def polygon(self, points, pen, brush):
         points = self._cvt_points(points)
 
         if (brush is not None) and brush.fill:
-            self.ctx.polygon(points, fill=brush.color, outline=pen.color)
+            self.ctx.polygon(points, fill=brush.color, outline=pen.color,
+                             width=pen.linewidth)
         else:
-            self.ctx.polygon(points, outline=pen.color)
+            self.ctx.polygon(points, outline=pen.color, width=pen.linewidth)
 
     def path(self, points, pen):
         points = self._cvt_points(points)

setup.cfg

@@ -49,7 +49,7 @@ install_requires =
     numpy>=1.14
     qtpy>=2.0.1
     astropy>=3.2
-    pillow>=6.2.1
+    pillow>=9.2.0
     importlib-metadata ; python_version == '3.7'
 setup_requires = setuptools_scm