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find versioned libGL, libEGL, libX11 on linux #39

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c257b45
Remove compiler warnings
DickerDackel Oct 28, 2025
cae06a4
Check dlopen libs versioned and unversioned
DickerDackel Oct 28, 2025
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52 changes: 41 additions & 11 deletions glcontext/egl.cpp
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
#include <Python.h>
#include <structmember.h>

#include <stdlib.h>
#include <dlfcn.h>

struct Display;
Expand Down Expand Up @@ -90,12 +91,25 @@ struct GLContext {

PyTypeObject * GLContext_type;

static void *try_dlopen(const char **names) {
void *lib;

for (const char **name = names; *name != NULL; name++) {
if ((lib = dlopen(*name, RTLD_LAZY)) != NULL) {
return lib;
}
}
return NULL;
}

GLContext * meth_create_context(PyObject * self, PyObject * args, PyObject * kwargs) {
static char * keywords[] = {"mode", "libgl", "libegl", "glversion", "device_index", NULL};
static const char * keywords[] = {"mode", "libgl", "libegl", "glversion", "device_index", NULL};

const char * mode = "standalone";
const char * libgl = "libGL.so";
const char * libegl = "libEGL.so";
const char * libgl = NULL;
const char * libgl_names[] = {"libGL.so", "libGL.so.1", NULL};
const char * libegl = NULL;
const char * libegl_names[] = {"libEGL.so", "libEGL.so.1", NULL};
int glversion = 330;
int device_index = 0;

Expand All @@ -105,16 +119,32 @@ GLContext * meth_create_context(PyObject * self, PyObject * args, PyObject * kwa

GLContext * res = PyObject_New(GLContext, GLContext_type);

res->libgl = dlopen(libgl, RTLD_LAZY);
if (!res->libgl) {
PyErr_Format(PyExc_Exception, "%s not loaded", libgl);
return NULL;
if (libgl) {
res->libgl = dlopen(libgl, RTLD_LAZY);
if (!res->libgl) {
PyErr_Format(PyExc_Exception, "%s not found by dynamic linker. Check with 'ldconfig -v'.", libgl);
return NULL;
}
} else {
res->libgl = try_dlopen(libgl_names);
if (!res->libgl) {
PyErr_Format(PyExc_Exception, "%s not found by dynamic linker. Check with 'ldconfig -v'.", libgl_names[0]);
return NULL;
}
}

res->libegl = dlopen(libegl, RTLD_LAZY);
if (!res->libegl) {
PyErr_Format(PyExc_Exception, "%s not loaded", libegl);
return NULL;
if (libegl) {
res->libegl = dlopen(libegl, RTLD_LAZY);
if (!res->libegl) {
PyErr_Format(PyExc_Exception, "%s not found by dynamic linker. Check with 'ldconfig -v'.", libegl);
return NULL;
}
} else {
res->libegl = try_dlopen(libegl_names);
if (!res->libegl) {
PyErr_Format(PyExc_Exception, "%s not found by dynamic linker. Check with 'ldconfig -v'.", libegl_names[0]);
return NULL;
}
}

res->m_eglGetError = (m_eglGetErrorProc)dlsym(res->libegl, "eglGetError");
Expand Down
52 changes: 41 additions & 11 deletions glcontext/x11.cpp
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Original file line number Diff line number Diff line change
@@ -1,6 +1,7 @@
#include <Python.h>
#include <structmember.h>

#include <stdlib.h>
#include <dlfcn.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
Expand Down Expand Up @@ -87,12 +88,25 @@ struct GLContext {

PyTypeObject * GLContext_type;

static void *try_dlopen(const char **names) {
void *lib;

for (const char **name = names; *name != NULL; name++) {
if ((lib = dlopen(*name, RTLD_LAZY)) != NULL) {
return lib;
}
}
return NULL;
}

GLContext * meth_create_context(PyObject * self, PyObject * args, PyObject * kwargs) {
static char * keywords[] = {"mode", "libgl", "libx11", "glversion", NULL};
static const char * keywords[] = {"mode", "libgl", "libx11", "glversion", NULL};

const char * mode = "detect";
const char * libgl = "libGL.so";
const char * libx11 = "libX11.so";
const char * libgl = NULL;
const char * libgl_names[] = {"libGL.so", "libGL.so.1", NULL};
const char * libx11 = NULL;
const char * libx11_names[] = {"libX11.so", "libX11.so.6", NULL};
int glversion = 330;

if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|sssi", keywords, &mode, &libgl, &libx11, &glversion)) {
Expand All @@ -101,10 +115,18 @@ GLContext * meth_create_context(PyObject * self, PyObject * args, PyObject * kwa

GLContext * res = PyObject_New(GLContext, GLContext_type);

res->libgl = dlopen(libgl, RTLD_LAZY);
if (!res->libgl) {
PyErr_Format(PyExc_Exception, "%s not found in /lib, /usr/lib or LD_LIBRARY_PATH", libgl);
return NULL;
if (libgl) {
res->libgl = dlopen(libgl, RTLD_LAZY);
if (!res->libgl) {
PyErr_Format(PyExc_Exception, "%s not found by dynamic linker. Check with 'ldconfig -v'.", libgl);
return NULL;
}
} else {
res->libgl = try_dlopen(libgl_names);
if (!res->libgl) {
PyErr_Format(PyExc_Exception, "%s not found by dynamic linker. Check with 'ldconfig -v'.", libgl_names[0]);
return NULL;
}
}

res->m_glXChooseFBConfig = (m_glXChooseFBConfigProc)dlsym(res->libgl, "glXChooseFBConfig");
Expand Down Expand Up @@ -162,10 +184,18 @@ GLContext * meth_create_context(PyObject * self, PyObject * args, PyObject * kwa
}

if (strcmp(mode, "detect")) {
res->libx11 = dlopen(libx11, RTLD_LAZY);
if (!res->libx11) {
PyErr_Format(PyExc_Exception, "(detect) %s not loaded", libx11);
return NULL;
if (libx11) {
res->libx11 = dlopen(libx11, RTLD_LAZY);
if (!res->libx11) {
PyErr_Format(PyExc_Exception, "(detect) %s not found by dynamic linker. Check with 'ldconfig -v'.", libx11);
return NULL;
}
} else {
res->libx11 = try_dlopen(libx11_names);
if (!res->libx11) {
PyErr_Format(PyExc_Exception, "(detect) %s not found by dynamic linker. Check with 'ldconfig -v'.", libx11_names[0]);
return NULL;
}
}

res->m_XOpenDisplay = (m_XOpenDisplayProc)dlsym(res->libx11, "XOpenDisplay");
Expand Down
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