add macOS implementation

macos/include/bluegl/BlueGL.h

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**********************************************************************************************
+ * Generated by bluegl/bluegl-gen.py
+ * DO NOT EDIT
+ **********************************************************************************************/
+
+#ifndef TNT_FILAMENT_BLUEGL__H
+#define TNT_FILAMENT_BLUEGL__H
+
+
+// MSVC includes .../Windows Kits\10\Include\10.0.17763.0\um\GL/gl.h, with gl APIs conflicting with
+// bluegl\include\GL/glcorearb.h, causing errors for OpenGL APIs such as:
+// error C2375:  'glBindTexture': redefinition; different linkage
+#ifndef FILAMENT_PLATFORM_WGL
+    #define GL_GLEXT_PROTOTYPES 1
+#endif
+
+
+#include <GL/glcorearb.h>
+#include <GL/glext.h>
+
+#if defined(WIN32)
+
+#ifdef max
+#undef max
+#endif
+
+#ifdef min
+#undef min
+#endif
+
+#ifdef far
+#undef far
+#endif
+
+#ifdef near
+#undef near
+#endif
+
+#ifdef ERROR
+#undef ERROR
+#endif
+
+#ifdef OPAQUE
+#undef OPAQUE
+#endif
+
+#ifdef TRANSPARENT
+#undef TRANSPARENT
+#endif
+
+#ifdef PURE
+#undef PURE
+#endif
+
+#endif
+
+namespace bluegl {
+
+/**
+ * Looks up and binds all available OpenGL Core functions.
+ * Every call to this function will increase an internal reference
+ * counter that can be decreased by calling unbind().
+ *
+ * @return 0 on success or -1 if an error occurred.
+ */
+int bind();
+
+/**
+ * Unbinds all available OpenGL Core functions.
+ * Every call to this function will decrease an internal reference
+ * counter and unbind all OpenGL functions when the counter reaches 0.
+ * As such you should assume that no OpenGL calls can be made after
+ * calling this function.
+ */
+void unbind();
+
+
+} // namespace bluegl
+
+#endif // TNT_FILAMENT_BLUEGL__H