[PDF] Restrict scalars to the range that PDF understands.

* Add a config flag to ignore the restrictions
* Apply restriction to both SkPDFScalar and scalars used in content streams.
* +/- 32,767 for the integer part.
* +/1 1/65536 for the fraction part.

Review URL: http://codereview.appspot.com/4240050

git-svn-id: http://skia.googlecode.com/svn/trunk@882 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/include/config/SkUserConfig.h b/include/config/SkUserConfig.h
index c0bbb4b..13169ca 100644
--- a/include/config/SkUserConfig.h
+++ b/include/config/SkUserConfig.h
@@ -123,6 +123,11 @@
  */
 //#define SK_ZLIB_INCLUDE <zlib.h>
 
+/*  Define this to allow PDF scalars above 32k.  The PDF/A spec doesn't allow
+    them, but modern PDF interpreters should handle them just fine.
+ */
+//#define SK_ALLOW_LARGE_PDF_SCALARS
+
 /*  Define this to remove dimension checks on bitmaps. Not all blits will be
     correct yet, so this is mostly for debugging the implementation.
  */