add SkSfntUtils to parse some known truetype tables
add comments and cleanup to count_tables in SkFontHost_tables.cpp
fix transparency bug in gifs
use (alpha+1) for blending in srcover mode, to ensure opaque results



git-svn-id: http://skia.googlecode.com/svn/trunk@155 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/SrcOverTest.cpp b/tests/SrcOverTest.cpp
index 497b3a8..e95485b 100644
--- a/tests/SrcOverTest.cpp
+++ b/tests/SrcOverTest.cpp
@@ -39,7 +39,7 @@
              opaqueCounter0, opaqueCounter1, opaqueCounter2);
 #endif
     // we acknowledge that technique0 does not always return opaque
-    REPORTER_ASSERT(reporter, opaqueCounter0 == 129);
+    REPORTER_ASSERT(reporter, opaqueCounter0 == 256);
     REPORTER_ASSERT(reporter, opaqueCounter1 == 256);
     REPORTER_ASSERT(reporter, opaqueCounter2 == 256);