e">    vertex_shader = glCreateShader(GL_VERTEX_SHADER);</div><div class="line">    glShaderSource(vertex_shader, 1, &amp;vertex_shader_text, NULL);</div><div class="line">    glCompileShader(vertex_shader);</div><div class="line"></div><div class="line">    fragment_shader = glCreateShader(GL_FRAGMENT_SHADER);</div><div class="line">    glShaderSource(fragment_shader, 1, &amp;fragment_shader_text, NULL);</div><div class="line">    glCompileShader(fragment_shader);</div><div class="line"></div><div class="l