Method init

Source/3rdParty/bgfx/src/renderer_gl.cpp:5105–5410

	}

	void ProgramGL::init()
	{
		GLint activeAttribs  = 0;
		GLint activeUniforms = 0;
		GLint activeBuffers  = 0;

#if BGFX_CONFIG_RENDERER_OPENGL >= 31
		GL_CHECK(glBindFragDataLocation(m_id, 0, "bgfx_FragColor") );
#endif // BGFX_CONFIG_RENDERER_OPENGL >= 31

		GLint max0, max1;

		bool piqSupported = true
			&& s_extension[Extension::ARB_program_interface_query     ].m_supported
			&& s_extension[Extension::ARB_shader_storage_buffer_object].m_supported
			;

		if (piqSupported)
		{
			GL_CHECK(glGetProgramInterfaceiv(m_id, GL_PROGRAM_INPUT,   GL_ACTIVE_RESOURCES, &activeAttribs ) );
			GL_CHECK(glGetProgramInterfaceiv(m_id, GL_UNIFORM,         GL_ACTIVE_RESOURCES, &activeUniforms) );
			GL_CHECK(glGetProgramInterfaceiv(m_id, GL_BUFFER_VARIABLE, GL_ACTIVE_RESOURCES, &activeBuffers ) );
			GL_CHECK(glGetProgramInterfaceiv(m_id, GL_PROGRAM_INPUT,   GL_MAX_NAME_LENGTH,  &max0          ) );
			GL_CHECK(glGetProgramInterfaceiv(m_id, GL_UNIFORM,         GL_MAX_NAME_LENGTH,  &max1          ) );
		}
		else
		{
			GL_CHECK(glGetProgramiv(m_id, GL_ACTIVE_ATTRIBUTES, &activeAttribs ) );
			GL_CHECK(glGetProgramiv(m_id, GL_ACTIVE_UNIFORMS,   &activeUniforms) );

			GL_CHECK(glGetProgramiv(m_id, GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, &max0) );
			GL_CHECK(glGetProgramiv(m_id, GL_ACTIVE_UNIFORM_MAX_LENGTH,   &max1) );
		}

		uint32_t maxLength = bx::uint32_max(max0, max1);
		char* name = (char*)BX_STACK_ALLOC(maxLength + 1);

		BX_TRACE("Program %d", m_id);
		BX_TRACE("Attributes (%d):", activeAttribs);
		for (int32_t ii = 0; ii < activeAttribs; ++ii)
		{
			GLint size;
			GLenum type = 0;

			if (piqSupported)
			{
				GL_CHECK(glGetProgramResourceName(m_id, GL_PROGRAM_INPUT, ii, maxLength + 1, &size, name) );
				GLenum typeProp[] = { GL_TYPE };
				GL_CHECK(glGetProgramResourceiv(m_id
					, GL_PROGRAM_INPUT
					, ii
					, BX_COUNTOF(typeProp)
					, typeProp
					, 1
					, NULL
					, (GLint *)&type)
					);
			}