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Laurent Pinchart's clone of libcameragit repository hosting on libcamera.org
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path: root/src/py/cam/gl_helpers.py
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# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (C) 2022, Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>

from OpenGL.EGL.VERSION.EGL_1_0 import EGLNativeDisplayType, eglGetProcAddress, eglQueryString, EGL_EXTENSIONS

from OpenGL.raw.GLES2 import _types as _cs
from OpenGL.GLES2.VERSION.GLES2_2_0 import *
from OpenGL.GLES3.VERSION.GLES3_3_0 import *
from OpenGL import GL as gl

from ctypes import c_int, c_char_p, c_void_p, cdll, POINTER, util, \
    pointer, CFUNCTYPE, c_bool


def getEGLNativeDisplay():
    _x11lib = cdll.LoadLibrary(util.find_library('X11'))
    XOpenDisplay = _x11lib.XOpenDisplay
    XOpenDisplay.argtypes = [c_char_p]
    XOpenDisplay.restype = POINTER(EGLNativeDisplayType)

    return XOpenDisplay(None)


# Hack. PyOpenGL doesn't seem to manage to find glEGLImageTargetTexture2DOES.
def getglEGLImageTargetTexture2DOES():
    funcptr = eglGetProcAddress('glEGLImageTargetTexture2DOES')
    prototype = CFUNCTYPE(None, _cs.GLenum, _cs.GLeglImageOES)
    return prototype(funcptr)