Added smoothening option

panoramix/forms.py

@@ -116,6 +116,15 @@ class FormFactory(object):
                     'black_white']),
                 default='fire',
                 description=""),
+            'canvas_image_rendering': SelectField(
+                'Rendering', choices=(
+                    ('pixelated', 'pixelated (Sharp)'),
+                    ('auto', 'auto (Smooth)'),
+                ),
+                default='pixelated',
+                description=(
+                    "image-rendering CSS attribute of the canvas object that "
+                    "defines how the browser scales up the image")),
             'xscale_interval': SelectField(
                 'XScale Interval', choices=self.choicify(range(1, 50)),
                 default='1',

panoramix/static/widgets/viz_heatmap.js

@@ -62,6 +62,7 @@ px.registerViz('heatmap', function(slice) {
         .attr("height", heatmapDim[Y])
         .style("width", hmWidth + "px")
         .style("height", hmHeight + "px")
+        .style("image-rendering", fd.canvas_image_rendering)
         .style("left", margins.l + "px")
         .style("top", margins.t + "px")
         .style("position", "absolute");

panoramix/viz.py

@@ -1212,6 +1212,7 @@ class HeatmapViz(BaseViz):
         'fields': (
             'linear_color_scheme',
             ('xscale_interval', 'yscale_interval'),
+            'canvas_image_rendering',
         )
     },)
     def query_obj(self):