1 files changed, 138 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/libANGLE/queryconversions.h b/gfx/angle/checkout/src/libANGLE/queryconversions.h
new file mode 100644
index 0000000000..7784c33e73
--- /dev/null
+++ b/gfx/angle/checkout/src/libANGLE/queryconversions.h
@@ -0,0 +1,138 @@
+//
+// Copyright 2014 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.
+//
+
+// queryconversions.h: Declaration of state query cast conversions
+
+#ifndef LIBANGLE_QUERY_CONVERSIONS_H_
+#define LIBANGLE_QUERY_CONVERSIONS_H_
+
+#include "angle_gl.h"
+#include "common/angleutils.h"
+
+namespace gl
+{
+class Context;
+
+// Helper class for converting a GL type to a GLenum:
+// We can't use CastStateValueEnum generally, because of GLboolean + GLubyte overlap.
+// We restrict our use to CastFromStateValue and CastQueryValueTo, where it eliminates
+// duplicate parameters.
+
+template <typename GLType>
+struct GLTypeToGLenum
+{
+    // static constexpr GLenum value;
+};
+
+template <>
+struct GLTypeToGLenum<GLint>
+{
+    static constexpr GLenum value = GL_INT;
+};
+template <>
+struct GLTypeToGLenum<GLuint>
+{
+    static constexpr GLenum value = GL_UNSIGNED_INT;
+};
+template <>
+struct GLTypeToGLenum<GLboolean>
+{
+    static constexpr GLenum value = GL_BOOL;
+};
+template <>
+struct GLTypeToGLenum<GLint64>
+{
+    static constexpr GLenum value = GL_INT_64_ANGLEX;
+};
+template <>
+struct GLTypeToGLenum<GLuint64>
+{
+    static constexpr GLenum value = GL_UINT_64_ANGLEX;
+};
+template <>
+struct GLTypeToGLenum<GLfloat>
+{
+    static constexpr GLenum value = GL_FLOAT;
+};
+
+GLint CastMaskValue(GLuint value);
+
+template <typename QueryT, typename InternalT>
+QueryT CastFromGLintStateValue(GLenum pname, InternalT value);
+
+template <typename QueryT, typename NativeT>
+QueryT CastFromStateValue(GLenum pname, NativeT value);
+
+template <typename NativeT, typename QueryT>
+NativeT CastQueryValueTo(GLenum pname, QueryT value);
+
+template <typename ParamType>
+GLenum ConvertToGLenum(GLenum pname, ParamType param)
+{
+    return static_cast<GLenum>(CastQueryValueTo<GLuint>(pname, param));
+}
+
+template <typename ParamType>
+GLenum ConvertToGLenum(ParamType param)
+{
+    return ConvertToGLenum(GL_NONE, param);
+}
+
+template <typename OutType>
+OutType ConvertGLenum(GLenum param)
+{
+    return static_cast<OutType>(param);
+}
+
+template <typename InType, typename OutType>
+void ConvertGLenumValue(InType param, OutType *out)
+{
+    *out = ConvertGLenum<OutType>(static_cast<GLenum>(param));
+}
+
+template <typename PackedEnumType, typename OutType>
+void ConvertPackedEnum(PackedEnumType param, OutType *out)
+{
+    *out = static_cast<OutType>(ToGLenum(param));
+}
+
+template <typename ParamType>
+GLint ConvertToGLint(ParamType param)
+{
+    return CastQueryValueTo<GLint>(GL_NONE, param);
+}
+
+template <typename ParamType>
+bool ConvertToBool(ParamType param)
+{
+    return param != GL_FALSE;
+}
+
+template <typename ParamType>
+GLboolean ConvertToGLBoolean(ParamType param)
+{
+    return param ? GL_TRUE : GL_FALSE;
+}
+
+// The GL state query API types are: bool, int, uint, float, int64, uint64
+template <typename QueryT>
+void CastStateValues(const Context *context,
+                     GLenum nativeType,
+                     GLenum pname,
+                     unsigned int numParams,
+                     QueryT *outParams);
+
+// The GL state query API types are: bool, int, uint, float, int64, uint64
+template <typename QueryT>
+void CastIndexedStateValues(Context *context,
+                            GLenum nativeType,
+                            GLenum pname,
+                            GLuint index,
+                            unsigned int numParams,
+                            QueryT *outParams);
+}  // namespace gl
+
+#endif  // LIBANGLE_QUERY_CONVERSIONS_H_