API: do not truncate the total size of svg element to integers

tacaswell · tacaswell · commit f435941406e9 · 2017-11-19T16:28:36.000-05:00
closes #9815
diff --git a/doc/api/api_changes/2017-11-19_svg_size.rst b/doc/api/api_changes/2017-11-19_svg_size.rst
@@ -0,0 +1,6 @@
+Do not truncate svg sizes to nearest point
+------------------------------------------
+
+There is no reason to size the SVG out put in integer points, change
+to out putting floats for the *height*, *width*, and *viewBox* attributes
+of the *svg* element.
diff --git a/lib/matplotlib/backends/backend_svg.py b/lib/matplotlib/backends/backend_svg.py
@@ -285,12 +285,14 @@ def __init__(self, width, height, svgwriter, basename=None, image_dpi=72):
 
         RendererBase.__init__(self)
         self._glyph_map = dict()
-
+        str_height = short_float_fmt(height)
+        str_width = short_float_fmt(width)
         svgwriter.write(svgProlog)
         self._start_id = self.writer.start(
             'svg',
-            width='%ipt' % width, height='%ipt' % height,
-            viewBox='0 0 %i %i' % (width, height),
+            width='%spt' % str_width,
+            height='%spt' % str_height,
+            viewBox='0 0 %s %s' % (str_width, str_height),
             xmlns="http://www.w3.org/2000/svg",
             version="1.1",
             attrib={'xmlns:xlink': "http://www.w3.org/1999/xlink"})
