GL_ARB_ES2_compatibility
https://www.khronos.org/registry/OpenGL/extensions/ARB/ARB_ES2_compatibility.txt
GL_ARB_ES2_compatibility

	GL_FIXED 0x140C
	GL_IMPLEMENTATION_COLOR_READ_TYPE 0x8B9A
	GL_IMPLEMENTATION_COLOR_READ_FORMAT 0x8B9B
	GL_RGB565 0x8D62
	GL_LOW_FLOAT 0x8DF0
	GL_MEDIUM_FLOAT 0x8DF1
	GL_HIGH_FLOAT 0x8DF2
	GL_LOW_INT 0x8DF3
	GL_MEDIUM_INT 0x8DF4
	GL_HIGH_INT 0x8DF5
	GL_SHADER_BINARY_FORMATS 0x8DF8
	GL_NUM_SHADER_BINARY_FORMATS 0x8DF9
	GL_SHADER_COMPILER 0x8DFA
	GL_MAX_VERTEX_UNIFORM_VECTORS 0x8DFB
	GL_MAX_VARYING_VECTORS 0x8DFC
	GL_MAX_FRAGMENT_UNIFORM_VECTORS 0x8DFD
	void glClearDepthf (GLclampf d)
	void glDepthRangef (GLclampf n, GLclampf f)
	void glGetShaderPrecisionFormat (GLenum shadertype, GLenum precisiontype, GLint* range, GLint *precision)
	void glReleaseShaderCompiler (void)
	void glShaderBinary (GLsizei count, const GLuint* shaders, GLenum binaryformat, const void*binary, GLsizei length)
	typedef int GLfixed
