EGL_EXT_surface_SMPTE2086_metadata
https://www.khronos.org/registry/egl/specs/eglspec.1.5.pdf
EGL_EXT_surface_SMPTE2086_metadata

	EGL_SMPTE2086_DISPLAY_PRIMARY_RX_EXT 0x3341
	EGL_SMPTE2086_DISPLAY_PRIMARY_RY_EXT 0x3342
	EGL_SMPTE2086_DISPLAY_PRIMARY_GX_EXT 0x3343
	EGL_SMPTE2086_DISPLAY_PRIMARY_GY_EXT 0x3344
	EGL_SMPTE2086_DISPLAY_PRIMARY_BX_EXT 0x3345
	EGL_SMPTE2086_DISPLAY_PRIMARY_BY_EXT 0x3346
	EGL_SMPTE2086_WHITE_POINT_X_EXT 0x3347
	EGL_SMPTE2086_WHITE_POINT_Y_EXT 0x3348
	EGL_SMPTE2086_MAX_LUMINANCE_EXT 0x3349
	EGL_SMPTE2086_MIN_LUMINANCE_EXT 0x334A
	EGL_METADATA_SCALING_EXT 50000