GLSL init snippet

opengl_shader.py

vertex_shader = glCreateShader(GL_VERTEX_SHADER)
glShaderSource(vertex_shader, vertex_shader_text)
glCompileShader(vertex_shader)
if not glGetShaderiv(vertex_shader, GL_COMPILE_STATUS):
    print('Vertex shader is not OK')
    print(glGetShaderInfoLog(vertex_shader))
    sys.exit(1)
else:
    print('Vertex shader is OK')

fragment_shader = glCreateShader(GL_FRAGMENT_SHADER)
glShaderSource(fragment_shader, fragment_shader_text)
glCompileShader(fragment_shader)
if not glGetShaderiv(fragment_shader, GL_COMPILE_STATUS):
    print('Fragment shader is not OK')
    print(glGetShaderInfoLog(fragment_shader))
    sys.exit(1)
else:
    print('Fragment shader is OK')

program = glCreateProgram()
glAttachShader(program, vertex_shader)
glDeleteShader(vertex_shader)
glAttachShader(program, fragment_shader)
glDeleteShader(fragment_shader)

glLinkProgram(program)
if not glGetProgramiv(program, GL_LINK_STATUS):
    print('Shader program is not OK')
    print(glGetProgramInfoLog(program))
    sys.exit(1)
else:
    print('Shader program is OK')

PyOpenGL==3.1.5
glfw==1.11.0

Vendor : b'Intel Inc.'
GPU : b'Intel Iris OpenGL Engine'
OpenGL version : b'4.1 INTEL-14.4.23'