skin_engine: Support percentages for viewport positioning

%V(0,50%,75%,50%,-) - make a viewport at x=0, y=half the lcd height,
75% lcd width and the remaining height (the other half) of the lcd.

Change-Id: If26ccb65e8dc52c9225f3fd6d7b222d770add0f0
Reviewed-on: http://gerrit.rockbox.org/184
Reviewed-by: Thomas Martitz <kugel@rockbox.org>
Tested-by: Thomas Martitz <kugel@rockbox.org>
Reviewed-by: Jonathan Gordon <rockbox@jdgordon.info>

1 files changed, 1 insertions, 0 deletions

diff --git a/lib/skin_parser/skin_parser.h b/lib/skin_parser/skin_parser.h
index 120112d995..ec51b64c8b 100644
--- a/lib/skin_parser/skin_parser.h
+++ b/lib/skin_parser/skin_parser.h
@@ -89,6 +89,7 @@ struct skin_tag_parameter
     {
         INTEGER,
         DECIMAL, /* stored in data.number as (whole*10)+part */
+        PERCENT, /* stored in data.number as (whole*10)+part */
         STRING,
         CODE,
         DEFAULT