1 files changed, 40 insertions, 0 deletions
diff --git a/gfx/angle/src/compiler/translator/VariablePacker.h b/gfx/angle/src/compiler/translator/VariablePacker.h
new file mode 100755
index 000000000..5f38a0a98
--- /dev/null
+++ b/gfx/angle/src/compiler/translator/VariablePacker.h
@@ -0,0 +1,40 @@
+//
+// Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+//
+
+#ifndef COMPILER_TRANSLATOR_VARIABLEPACKER_H_
+#define COMPILER_TRANSLATOR_VARIABLEPACKER_H_
+
+#include <vector>
+#include "compiler/translator/VariableInfo.h"
+
+class VariablePacker {
+ public:
+   // Returns true if the passed in variables pack in maxVectors following
+   // the packing rules from the GLSL 1.017 spec, Appendix A, section 7.
+   bool CheckVariablesWithinPackingLimits(unsigned int maxVectors,
+                                          const std::vector<sh::ShaderVariable> &in_variables);
+
+   // Gets how many components in a row a data type takes.
+   static int GetNumComponentsPerRow(sh::GLenum type);
+
+   // Gets how many rows a data type takes.
+   static int GetNumRows(sh::GLenum type);
+
+ private:
+   static const int kNumColumns      = 4;
+   static const unsigned kColumnMask = (1 << kNumColumns) - 1;
+
+   unsigned makeColumnFlags(int column, int numComponentsPerRow);
+   void fillColumns(int topRow, int numRows, int column, int numComponentsPerRow);
+   bool searchColumn(int column, int numRows, int *destRow, int *destSize);
+
+   int topNonFullRow_;
+   int bottomNonFullRow_;
+   int maxRows_;
+   std::vector<unsigned> rows_;
+};
+
+#endif // COMPILER_TRANSLATOR_VARIABLEPACKER_H_