diff --git a/opengl/include/EGL/Platform.h b/opengl/include/EGL/Platform.h
new file mode 100644
index 0000000..624d31f
--- /dev/null
+++ b/opengl/include/EGL/Platform.h
@@ -0,0 +1,329 @@
+//
+// Copyright (c) 2015 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.
+
+// Platform.h: The public interface ANGLE exposes to the API layer, for
+//   doing platform-specific tasks like gathering data, or for tracing.
+
+#ifndef ANGLE_PLATFORM_H
+#define ANGLE_PLATFORM_H
+
+#include <stdint.h>
+#include <array>
+
+#define EGL_PLATFORM_ANGLE_PLATFORM_METHODS_ANGLEX 0x3482
+
+#if defined(_WIN32)
+#   if !defined(LIBANGLE_IMPLEMENTATION)
+#       define ANGLE_PLATFORM_EXPORT __declspec(dllimport)
+#   else
+#       define ANGLE_PLATFORM_EXPORT __declspec(dllexport)
+#   endif
+#elif defined(__GNUC__) || defined(__clang__)
+#   define ANGLE_PLATFORM_EXPORT __attribute__((visibility ("default")))
+#endif
+#if !defined(ANGLE_PLATFORM_EXPORT)
+#   define ANGLE_PLATFORM_EXPORT
+#endif
+
+#if defined(_WIN32)
+#   define ANGLE_APIENTRY __stdcall
+#else
+#   define ANGLE_APIENTRY
+#endif
+
+namespace angle
+{
+struct WorkaroundsD3D;
+using TraceEventHandle = uint64_t;
+using EGLDisplayType   = void *;
+struct PlatformMethods;
+
+// Use a C-like API to not trigger undefined calling behaviour.
+// Avoid using decltype here to work around sanitizer limitations.
+// TODO(jmadill): Use decltype here if/when UBSAN is fixed.
+
+// System --------------------------------------------------------------
+
+// Wall clock time in seconds since the epoch.
+// TODO(jmadill): investigate using an ANGLE internal time library
+using CurrentTimeFunc = double (*)(PlatformMethods *platform);
+inline double DefaultCurrentTime(PlatformMethods *platform)
+{
+    return 0.0;
+}
+
+// Monotonically increasing time in seconds from an arbitrary fixed point in the past.
+// This function is expected to return at least millisecond-precision values. For this reason,
+// it is recommended that the fixed point be no further in the past than the epoch.
+using MonotonicallyIncreasingTimeFunc = double (*)(PlatformMethods *platform);
+inline double DefaultMonotonicallyIncreasingTime(PlatformMethods *platform)
+{
+    return 0.0;
+}
+
+// Logging ------------------------------------------------------------
+
+// Log an error message within the platform implementation.
+using LogErrorFunc = void (*)(PlatformMethods *platform, const char *errorMessage);
+inline void DefaultLogError(PlatformMethods *platform, const char *errorMessage)
+{
+}
+
+// Log a warning message within the platform implementation.
+using LogWarningFunc = void (*)(PlatformMethods *platform, const char *warningMessage);
+inline void DefaultLogWarning(PlatformMethods *platform, const char *warningMessage)
+{
+}
+
+// Log an info message within the platform implementation.
+using LogInfoFunc = void (*)(PlatformMethods *platform, const char *infoMessage);
+inline void DefaultLogInfo(PlatformMethods *platform, const char *infoMessage)
+{
+}
+
+// Tracing --------
+
+// Get a pointer to the enabled state of the given trace category. The
+// embedder can dynamically change the enabled state as trace event
+// recording is started and stopped by the application. Only long-lived
+// literal strings should be given as the category name. The implementation
+// expects the returned pointer to be held permanently in a local static. If
+// the unsigned char is non-zero, tracing is enabled. If tracing is enabled,
+// addTraceEvent is expected to be called by the trace event macros.
+using GetTraceCategoryEnabledFlagFunc = const unsigned char *(*)(PlatformMethods *platform,
+                                                                 const char *categoryName);
+inline const unsigned char *DefaultGetTraceCategoryEnabledFlag(PlatformMethods *platform,
+                                                               const char *categoryName)
+{
+    return nullptr;
+}
+
+//
+// Add a trace event to the platform tracing system. Depending on the actual
+// enabled state, this event may be recorded or dropped.
+// - phase specifies the type of event:
+//   - BEGIN ('B'): Marks the beginning of a scoped event.
+//   - END ('E'): Marks the end of a scoped event.
+//   - COMPLETE ('X'): Marks the beginning of a scoped event, but doesn't
+//     need a matching END event. Instead, at the end of the scope,
+//     updateTraceEventDuration() must be called with the TraceEventHandle
+//     returned from addTraceEvent().
+//   - INSTANT ('I'): Standalone, instantaneous event.
+//   - START ('S'): Marks the beginning of an asynchronous event (the end
+//     event can occur in a different scope or thread). The id parameter is
+//     used to match START/FINISH pairs.
+//   - FINISH ('F'): Marks the end of an asynchronous event.
+//   - COUNTER ('C'): Used to trace integer quantities that change over
+//     time. The argument values are expected to be of type int.
+//   - METADATA ('M'): Reserved for internal use.
+// - categoryEnabled is the pointer returned by getTraceCategoryEnabledFlag.
+// - name is the name of the event. Also used to match BEGIN/END and
+//   START/FINISH pairs.
+// - id optionally allows events of the same name to be distinguished from
+//   each other. For example, to trace the construction and destruction of
+//   objects, specify the pointer as the id parameter.
+// - timestamp should be a time value returned from monotonicallyIncreasingTime.
+// - numArgs specifies the number of elements in argNames, argTypes, and
+//   argValues.
+// - argNames is the array of argument names. Use long-lived literal strings
+//   or specify the COPY flag.
+// - argTypes is the array of argument types:
+//   - BOOL (1): bool
+//   - UINT (2): unsigned long long
+//   - INT (3): long long
+//   - DOUBLE (4): double
+//   - POINTER (5): void*
+//   - STRING (6): char* (long-lived null-terminated char* string)
+//   - COPY_STRING (7): char* (temporary null-terminated char* string)
+//   - CONVERTABLE (8): WebConvertableToTraceFormat
+// - argValues is the array of argument values. Each value is the unsigned
+//   long long member of a union of all supported types.
+// - flags can be 0 or one or more of the following, ORed together:
+//   - COPY (0x1): treat all strings (name, argNames and argValues of type
+//     string) as temporary so that they will be copied by addTraceEvent.
+//   - HAS_ID (0x2): use the id argument to uniquely identify the event for
+//     matching with other events of the same name.
+//   - MANGLE_ID (0x4): specify this flag if the id parameter is the value
+//     of a pointer.
+using AddTraceEventFunc = angle::TraceEventHandle (*)(PlatformMethods *platform,
+                                                      char phase,
+                                                      const unsigned char *categoryEnabledFlag,
+                                                      const char *name,
+                                                      unsigned long long id,
+                                                      double timestamp,
+                                                      int numArgs,
+                                                      const char **argNames,
+                                                      const unsigned char *argTypes,
+                                                      const unsigned long long *argValues,
+                                                      unsigned char flags);
+inline angle::TraceEventHandle DefaultAddTraceEvent(PlatformMethods *platform,
+                                                    char phase,
+                                                    const unsigned char *categoryEnabledFlag,
+                                                    const char *name,
+                                                    unsigned long long id,
+                                                    double timestamp,
+                                                    int numArgs,
+                                                    const char **argNames,
+                                                    const unsigned char *argTypes,
+                                                    const unsigned long long *argValues,
+                                                    unsigned char flags)
+{
+    return 0;
+}
+
+// Set the duration field of a COMPLETE trace event.
+using UpdateTraceEventDurationFunc = void (*)(PlatformMethods *platform,
+                                              const unsigned char *categoryEnabledFlag,
+                                              const char *name,
+                                              angle::TraceEventHandle eventHandle);
+inline void DefaultUpdateTraceEventDuration(PlatformMethods *platform,
+                                            const unsigned char *categoryEnabledFlag,
+                                            const char *name,
+                                            angle::TraceEventHandle eventHandle)
+{
+}
+
+// Callbacks for reporting histogram data.
+// CustomCounts histogram has exponential bucket sizes, so that min=1, max=1000000, bucketCount=50
+// would do.
+using HistogramCustomCountsFunc = void (*)(PlatformMethods *platform,
+                                           const char *name,
+                                           int sample,
+                                           int min,
+                                           int max,
+                                           int bucketCount);
+inline void DefaultHistogramCustomCounts(PlatformMethods *platform,
+                                         const char *name,
+                                         int sample,
+                                         int min,
+                                         int max,
+                                         int bucketCount)
+{
+}
+// Enumeration histogram buckets are linear, boundaryValue should be larger than any possible sample
+// value.
+using HistogramEnumerationFunc = void (*)(PlatformMethods *platform,
+                                          const char *name,
+                                          int sample,
+                                          int boundaryValue);
+inline void DefaultHistogramEnumeration(PlatformMethods *platform,
+                                        const char *name,
+                                        int sample,
+                                        int boundaryValue)
+{
+}
+// Unlike enumeration histograms, sparse histograms only allocate memory for non-empty buckets.
+using HistogramSparseFunc = void (*)(PlatformMethods *platform, const char *name, int sample);
+inline void DefaultHistogramSparse(PlatformMethods *platform, const char *name, int sample)
+{
+}
+// Boolean histograms track two-state variables.
+using HistogramBooleanFunc = void (*)(PlatformMethods *platform, const char *name, bool sample);
+inline void DefaultHistogramBoolean(PlatformMethods *platform, const char *name, bool sample)
+{
+}
+
+// Allows us to programatically override ANGLE's default workarounds for testing purposes.
+using OverrideWorkaroundsD3DFunc = void (*)(PlatformMethods *platform,
+                                            angle::WorkaroundsD3D *workaroundsD3D);
+inline void DefaultOverrideWorkaroundsD3D(PlatformMethods *platform,
+                                          angle::WorkaroundsD3D *workaroundsD3D)
+{
+}
+
+// Callback on a successful program link with the program binary. Can be used to store
+// shaders to disk. Keys are a 160-bit SHA-1 hash.
+using ProgramKeyType   = std::array<uint8_t, 20>;
+using CacheProgramFunc = void (*)(PlatformMethods *platform,
+                                  const ProgramKeyType &key,
+                                  size_t programSize,
+                                  const uint8_t *programBytes);
+inline void DefaultCacheProgram(PlatformMethods *platform,
+                                const ProgramKeyType &key,
+                                size_t programSize,
+                                const uint8_t *programBytes)
+{
+}
+
+// Platform methods are enumerated here once.
+#define ANGLE_PLATFORM_OP(OP)                                    \
+    OP(currentTime, CurrentTime)                                 \
+    OP(monotonicallyIncreasingTime, MonotonicallyIncreasingTime) \
+    OP(logError, LogError)                                       \
+    OP(logWarning, LogWarning)                                   \
+    OP(logInfo, LogInfo)                                         \
+    OP(getTraceCategoryEnabledFlag, GetTraceCategoryEnabledFlag) \
+    OP(addTraceEvent, AddTraceEvent)                             \
+    OP(updateTraceEventDuration, UpdateTraceEventDuration)       \
+    OP(histogramCustomCounts, HistogramCustomCounts)             \
+    OP(histogramEnumeration, HistogramEnumeration)               \
+    OP(histogramSparse, HistogramSparse)                         \
+    OP(histogramBoolean, HistogramBoolean)                       \
+    OP(overrideWorkaroundsD3D, OverrideWorkaroundsD3D)           \
+    OP(cacheProgram, CacheProgram)
+
+#define ANGLE_PLATFORM_METHOD_DEF(Name, CapsName) CapsName##Func Name = Default##CapsName;
+
+struct ANGLE_PLATFORM_EXPORT PlatformMethods
+{
+    PlatformMethods() {}
+
+    // User data pointer for any implementation specific members. Put it at the start of the
+    // platform structure so it doesn't become overwritten if one version of the platform
+    // adds or removes new members.
+    void *context = 0;
+
+    ANGLE_PLATFORM_OP(ANGLE_PLATFORM_METHOD_DEF);
+};
+
+#undef ANGLE_PLATFORM_METHOD_DEF
+
+// Subtract one to account for the context pointer.
+constexpr unsigned int g_NumPlatformMethods = (sizeof(PlatformMethods) / sizeof(uintptr_t)) - 1;
+
+#define ANGLE_PLATFORM_METHOD_STRING(Name) #Name
+#define ANGLE_PLATFORM_METHOD_STRING2(Name, CapsName) ANGLE_PLATFORM_METHOD_STRING(Name),
+
+constexpr const char *const g_PlatformMethodNames[g_NumPlatformMethods] = {
+    ANGLE_PLATFORM_OP(ANGLE_PLATFORM_METHOD_STRING2)};
+
+#undef ANGLE_PLATFORM_METHOD_STRING2
+#undef ANGLE_PLATFORM_METHOD_STRING
+
+}  // namespace angle
+
+extern "C" {
+
+// Gets the platform methods on the passed-in EGL display. If the method name signature does not
+// match the compiled signature for this ANGLE, false is returned. On success true is returned.
+// The application should set any platform methods it cares about on the returned pointer.
+// If display is not valid, behaviour is undefined.
+
+ANGLE_PLATFORM_EXPORT bool ANGLE_APIENTRY ANGLEGetDisplayPlatform(angle::EGLDisplayType display,
+                                                                  const char *const methodNames[],
+                                                                  unsigned int methodNameCount,
+                                                                  void *context,
+                                                                  void *platformMethodsOut);
+
+// Sets the platform methods back to their defaults.
+// If display is not valid, behaviour is undefined.
+ANGLE_PLATFORM_EXPORT void ANGLE_APIENTRY ANGLEResetDisplayPlatform(angle::EGLDisplayType display);
+
+}  // extern "C"
+
+namespace angle
+{
+typedef bool(ANGLE_APIENTRY *GetDisplayPlatformFunc)(angle::EGLDisplayType,
+                                                     const char *const *,
+                                                     unsigned int,
+                                                     void *,
+                                                     void *);
+typedef void(ANGLE_APIENTRY *ResetDisplayPlatformFunc)(angle::EGLDisplayType);
+}  // namespace angle
+
+// This function is not exported
+angle::PlatformMethods *ANGLEPlatformCurrent();
+
+#endif // ANGLE_PLATFORM_H