GLuint m_VAO;
GLuint m_VBO;
GLuint m_tex;

int m_image_width, m_image_height;
unsigned char*  m_image = nullptr;

std::vector<Vertex> m_vertices;

[...]

glGenTextures(1, &m_tex);
glBindTexture( GL_TEXTURE_2D, m_tex );

glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR );
glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );

m_image = SOIL_load_image( textureName.c_str(), &m_image_width, &m_image_height, 0, SOIL_LOAD_AUTO );

if( m_image == 0 )
{
    std::cout << "ERROR. SOIL did not work correctly: " << SOIL_last_result() << std::endl;
}

glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, m_image_width, m_image_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, m_image );
glGenerateMipmap( GL_TEXTURE_2D );

SOIL_free_image_data( m_image );
glBindTexture( GL_TEXTURE_2D, 0 );

glBindVertexArray( m_VAO );
glEnableVertexAttribArray( 2 );
glVertexAttribPointer( 2, 2, GL_FLOAT,GL_FALSE, sizeof( Vertex ), ( GLvoid* )offsetof( Vertex, texture ) );
glBindVertexArray( 0 );

glBindTexture( GL_TEXTURE_2D, m_tex );
glBindVertexArray( m_VAO );
glDrawArrays( GL_TRIANGLE_STRIP, 0, 4 );
glBindVertexArray( 0 );