INVALID_FRAMEBUFFER_OPERATION : 0x0506,
+IMPLEMENTATION_COLOR_READ_TYPE : 0x8B9A,
+IMPLEMENTATION_COLOR_READ_FORMAT : 0x8B9B,
+
/* WebGL-specific enums */
UNPACK_FLIP_Y_WEBGL : 0x9240,
UNPACK_PREMULTIPLY_ALPHA_WEBGL : 0x9241,
UNSIGNED_INT_SAMPLER_3D : 0x8DD3,
UNSIGNED_INT_SAMPLER_CUBE : 0x8DD4,
UNSIGNED_INT_SAMPLER_2D_ARRAY : 0x8DD7,
-BUFFER_ACCESS_FLAGS : 0x911F,
-BUFFER_MAP_LENGTH : 0x9120,
-BUFFER_MAP_OFFSET : 0x9121,
DEPTH_COMPONENT32F : 0x8CAC,
DEPTH32F_STENCIL8 : 0x8CAD,
FLOAT_32_UNSIGNED_INT_24_8_REV : 0x8DAD,