From: Thomas Fillon <thomas@parisson.com>
Date: Sat, 21 Jun 2014 07:29:06 +0000 (+0200)
Subject: fix(render_analyzers) : fix blending of background image
X-Git-Tag: 0.6~4^2~89
X-Git-Url: https://git.parisson.com/?a=commitdiff_plain;h=2ce4fcf695f2ea0a1753c5aec6ea4b49b8b354e3;p=timeside.git

fix(render_analyzers) : fix blending of background image
---

diff --git a/timeside/grapher/render_analyzers.py b/timeside/grapher/render_analyzers.py
index 54dc46e..3ba9414 100644
--- a/timeside/grapher/render_analyzers.py
+++ b/timeside/grapher/render_analyzers.py
@@ -62,10 +62,14 @@ class DisplayAnalyzer(Grapher):
             bg_result = self.process_pipe.results[self._bg_id]
             bg_image = bg_result._render_PIL((self.image_width,
                                               self.image_height), self.dpi)
-            bg_image.paste(fg_image, (0, 0), fg_image)
-            self.image = bg_image
-        else:
-            self.image = fg_image
+            # convert image to grayscale
+            bg_image = bg_image.convert('LA').convert('RGBA')
+
+            # Merge background and foreground images
+            from PIL.Image import blend
+            fg_image = blend(fg_image, bg_image, 0.25)
+
+        self.image = fg_image
 
     @classmethod
     def create(cls, analyzer, result_id, grapher_id, grapher_name,