pub type DebugSource = GLenum;
DebugSource
GL_DEBUG_SOURCE_API
GL_DEBUG_SOURCE_APPLICATION
GL_DEBUG_SOURCE_OTHER
GL_DEBUG_SOURCE_SHADER_COMPILER
GL_DEBUG_SOURCE_THIRD_PARTY
GL_DEBUG_SOURCE_WINDOW_SYSTEM
GL_DONT_CARE
#[repr(transparent)]pub struct DebugSource(pub u32);
0: u32