androink.py: support both mdpi and hdpi as baseline densities

Also replace the word "resolutions" with "density" which is more
accurate in this context.

diff --git a/ic_launcher_template/androink.py b/ic_launcher_template/androink.py
index a423b7b..efb9356 100755 (executable)
--- a/ic_launcher_template/androink.py
+++ b/ic_launcher_template/androink.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# androink - Generate android resources for multiple resolutions
+# androink - Generate android resources for multiple densities
 #
 # Copyright (C) 2012  Federico Paolinelli <fedepaol@gmail.com>
 # Copyright (C) 2013  Antonio Ospite <ospite@studenti.unina.it>
@@ -30,8 +30,8 @@ import os
 
 __description = """This script expects the svg to use Inkscape DPIs.
 
-This means that the resolution given in the drawing will be used for
-MDPI resolution and scaled to generate the other resolutions.
+Either MDPI or HDPI can be used as the baseline density and the drawables will
+scaled to generate the other densities.
 
 """
 __version = "0.1"
@@ -40,23 +40,40 @@ __author_info = "Federico Paolinelli, Antonio Ospite"
 
 BASE_OPTIONS = ' --export-area-page --export-png '
 
-# Inkscape default DPI is 90, we use this for the MDPI resource
+# Inkscape default DPI is 90
 BASELINE_DPI = 90
 
-LDPI = ('drawable-ldpi', BASELINE_DPI * 0.75)
-MDPI = ('drawable-mdpi', BASELINE_DPI * 1.0)
-HDPI = ('drawable-hdpi', BASELINE_DPI * 1.5)
-XHDPI = ('drawable-xhdpi', BASELINE_DPI * 2.0)
+# densities are calculated following the scaling ratio
+# 3:4:6:8 mapped to ldpi:mdpi:hdpi:xhdpi
 
-resolutions = [LDPI, MDPI, HDPI, XHDPI]
+# for baseline mdpi consider 4 as the base ratio
+densities_baseline_mdpi = [
+    ('drawable-ldpi', BASELINE_DPI * 0.75),  # 3/4
+    ('drawable-mdpi', BASELINE_DPI * 1.0),  # 4/4
+    ('drawable-hdpi', BASELINE_DPI * 1.5),  # 6/4
+    ('drawable-xhdpi', BASELINE_DPI * 2.0),  # 8/4
+    ]
+
+# for baseline hdpi consider 6 as the base ratio
+densities_baseline_hdpi = [
+    ('drawable-ldpi', BASELINE_DPI * 0.5),  # 3/6
+    ('drawable-mdpi', BASELINE_DPI * 0.666666667),  # 4/6
+    ('drawable-hdpi', BASELINE_DPI * 1.0),  # 6/6
+    ('drawable-xhdpi', BASELINE_DPI * 1.333333333),  # 8/6
+    ]
 
 
 def export_file(file_name):
     print 'exporting file', file_name
     name_without_ext = os.path.splitext(file_name)[0]
 
-    for rel in resolutions:
-        dpispec, dpi = rel
+    if args.baseline_density == 'mdpi':
+        densities = densities_baseline_mdpi
+    elif args.baseline_density == 'hdpi':
+        densities = densities_baseline_hdpi
+
+    for density in densities:
+        dpispec, dpi = density
         res_path = os.path.join(args.res_folder, dpispec)
 
         if not os.path.exists(res_path):
@@ -97,6 +114,10 @@ def option_parser():
             dest='ink_path', default='inkscape',
             help='path of Inkscape executable')
 
+    parser.add_argument('-d', '--baseline-density', metavar="<mdpi|hdpi>",
+            dest='baseline_density', choices=['mdpi', 'hdpi'], default='mdpi',
+            help='the baseline density to generate the drawables from')
+
     parser.add_argument('-D', '--dry_run',
             dest='dry', action='store_const', const=True,
             help='performs a dry run')