setup_imgui_window.py

from sys import exit
from sdl2 import *


def impl_pysdl2_init():
    width, height = 800, 600
    window_name = "Spectograph Viewer"

    if SDL_Init(SDL_INIT_EVERYTHING) < 0:
        print("Error: SDL could not initialize! SDL Error: ", SDL_GetError())
        exit(1)

    SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1)
    SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 24)
    SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE, 8)
    SDL_GL_SetAttribute(SDL_GL_ACCELERATED_VISUAL, 1)
    SDL_GL_SetAttribute(SDL_GL_MULTISAMPLEBUFFERS, 1)
    SDL_GL_SetAttribute(SDL_GL_MULTISAMPLESAMPLES, 16)
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_FLAGS,
                        SDL_GL_CONTEXT_FORWARD_COMPATIBLE_FLAG)
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MAJOR_VERSION, 4)
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_MINOR_VERSION, 1)
    SDL_GL_SetAttribute(SDL_GL_CONTEXT_PROFILE_MASK,
                        SDL_GL_CONTEXT_PROFILE_CORE)

    SDL_SetHint(SDL_HINT_MAC_CTRL_CLICK_EMULATE_RIGHT_CLICK, b"1")
    SDL_SetHint(SDL_HINT_VIDEO_HIGHDPI_DISABLED, b"1")

    window = SDL_CreateWindow(
        window_name.encode('utf-8'), SDL_WINDOWPOS_CENTERED,
        SDL_WINDOWPOS_CENTERED, width, height,
        SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI)

    if window is None:
        print("Error: Window could not be created! SDL Error: ",
              SDL_GetError())
        exit(1)

    gl_context = SDL_GL_CreateContext(window)
    if gl_context is None:
        print("Error: Cannot create OpenGL Context! SDL Error: ",
              SDL_GetError())
        exit(1)

    SDL_GL_MakeCurrent(window, gl_context)
    if SDL_GL_SetSwapInterval(1) < 0:
        pass
        # print("Warning: Unable to set VSync! SDL Error: ", SDL_GetError())
        # exit(1)

    return window, gl_context