improved performance of parsing SkSLLayout flags

BUG=skia:

Change-Id: Ib0e1393fb44f5f934ad2f88fed638ef7a0fa7393
Reviewed-on: https://skia-review.googlesource.com/8463
Reviewed-by: Ben Wagner <benjaminwagner@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/src/sksl/SkSLParser.h b/src/sksl/SkSLParser.h
index 75532e6238..f277745925 100644
--- a/src/sksl/SkSLParser.h
+++ b/src/sksl/SkSLParser.h
@@ -10,6 +10,7 @@
 
 #include <vector>
 #include <memory>
+#include <unordered_map>
 #include <unordered_set>
 #include "SkSLErrorReporter.h"
 #include "SkSLToken.h"
@@ -206,6 +207,20 @@ private:
     Token fPushback;
     SymbolTable& fTypes;
     ErrorReporter& fErrors;
+    enum LayoutKey {
+        kLocation_LayoutKey,
+        kOffset_LayoutKey,
+        kBinding_LayoutKey,
+        kIndex_LayoutKey,
+        kSet_LayoutKey,
+        kBuiltin_LayoutKey,
+        kInputAttachmentIndex_LayoutKey,
+        kOriginUpperLeft_LayoutKey,
+        kOverrideCoverage_LayoutKey,
+        kBlendSupportAllEquations_LayoutKey,
+        kPushConstant_LayoutKey
+    };
+    std::unordered_map<SkString, LayoutKey> fLayoutKeys;
 
     friend class AutoDepth;
 };