1 files changed, 127 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/libANGLE/entry_points_utils.h b/gfx/angle/checkout/src/libANGLE/entry_points_utils.h
new file mode 100644
index 0000000000..c5a3178308
--- /dev/null
+++ b/gfx/angle/checkout/src/libANGLE/entry_points_utils.h
@@ -0,0 +1,127 @@
+//
+// Copyright 2018 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.
+//
+// entry_point_utils:
+//   These helpers are used in GL/GLES entry point routines.
+
+#ifndef LIBANGLE_ENTRY_POINT_UTILS_H_
+#define LIBANGLE_ENTRY_POINT_UTILS_H_
+
+#include "angle_gl.h"
+#include "common/Optional.h"
+#include "common/PackedEnums.h"
+#include "common/angleutils.h"
+#include "common/entry_points_enum_autogen.h"
+#include "common/mathutil.h"
+#include "libANGLE/Context.h"
+#include "libANGLE/Display.h"
+
+namespace gl
+{
+// A template struct for determining the default value to return for each entry point.
+template <angle::EntryPoint EP, typename ReturnType>
+struct DefaultReturnValue;
+
+// Default return values for each basic return type.
+template <angle::EntryPoint EP>
+struct DefaultReturnValue<EP, GLint>
+{
+    static constexpr GLint kValue = -1;
+};
+
+// This doubles as the GLenum return value.
+template <angle::EntryPoint EP>
+struct DefaultReturnValue<EP, GLuint>
+{
+    static constexpr GLuint kValue = 0;
+};
+
+template <angle::EntryPoint EP>
+struct DefaultReturnValue<EP, GLboolean>
+{
+    static constexpr GLboolean kValue = GL_FALSE;
+};
+
+template <angle::EntryPoint EP>
+struct DefaultReturnValue<EP, ShaderProgramID>
+{
+    static constexpr ShaderProgramID kValue = {0};
+};
+
+// Catch-all rules for pointer types.
+template <angle::EntryPoint EP, typename PointerType>
+struct DefaultReturnValue<EP, const PointerType *>
+{
+    static constexpr const PointerType *kValue = nullptr;
+};
+
+template <angle::EntryPoint EP, typename PointerType>
+struct DefaultReturnValue<EP, PointerType *>
+{
+    static constexpr PointerType *kValue = nullptr;
+};
+
+// Overloaded to return invalid index
+template <>
+struct DefaultReturnValue<angle::EntryPoint::GLGetUniformBlockIndex, GLuint>
+{
+    static constexpr GLuint kValue = GL_INVALID_INDEX;
+};
+
+// Specialized enum error value.
+template <>
+struct DefaultReturnValue<angle::EntryPoint::GLClientWaitSync, GLenum>
+{
+    static constexpr GLenum kValue = GL_WAIT_FAILED;
+};
+
+// glTestFenceNV should still return TRUE for an invalid fence.
+template <>
+struct DefaultReturnValue<angle::EntryPoint::GLTestFenceNV, GLboolean>
+{
+    static constexpr GLboolean kValue = GL_TRUE;
+};
+
+template <angle::EntryPoint EP, typename ReturnType>
+constexpr ANGLE_INLINE ReturnType GetDefaultReturnValue()
+{
+    return DefaultReturnValue<EP, ReturnType>::kValue;
+}
+
+#if ANGLE_CAPTURE_ENABLED
+#    define ANGLE_CAPTURE_GL(Func, ...) CaptureCallToFrameCapture(Capture##Func, __VA_ARGS__)
+#    define ANGLE_CAPTURE_EGL(Func, ...) CaptureCallToCaptureEGL(Capture##Func, __VA_ARGS__)
+#else
+#    define ANGLE_CAPTURE_GL(...)
+#    define ANGLE_CAPTURE_EGL(...)
+#endif  // ANGLE_CAPTURE_ENABLED
+
+#define EGL_EVENT(EP, FMT, ...) EVENT(nullptr, EGL##EP, FMT, ##__VA_ARGS__)
+
+inline int CID(const Context *context)
+{
+    return context == nullptr ? 0 : static_cast<int>(context->id().value);
+}
+}  // namespace gl
+
+namespace egl
+{
+inline int CID(EGLDisplay display, EGLContext context)
+{
+    auto *displayPtr = reinterpret_cast<const egl::Display *>(display);
+    if (!Display::isValidDisplay(displayPtr))
+    {
+        return -1;
+    }
+    auto *contextPtr = reinterpret_cast<const gl::Context *>(context);
+    if (!displayPtr->isValidContext(contextPtr))
+    {
+        return -1;
+    }
+    return gl::CID(contextPtr);
+}
+}  // namespace egl
+
+#endif  // LIBANGLE_ENTRY_POINT_UTILS_H_