implement windowed gl provider

glcontext/windowed.cpp

@@ -0,0 +1,73 @@
+#include <Python.h>
+
+#if defined(_WIN32) || defined(_WIN64)
+
+#include <Windows.h>
+
+PyObject * meth_load_opengl_function(PyObject * self, PyObject * arg) {
+    if (!PyUnicode_CheckExact(arg)) {
+        return NULL;
+    }
+    HMODULE module = GetModuleHandle("opengl32");
+    if (!module) {
+        return NULL;
+    }
+    const char * name = PyUnicode_AsUTF8(arg);
+    void * proc = (void *)GetProcAddress(module, name);
+    if (!proc) {
+        proc = wglGetProcAddress(name);
+    }
+    return PyLong_FromVoidPtr(proc);
+}
+
+#elif defined(__APPLE__)
+
+#include <OpenGL/OpenGL.h>
+#include <ApplicationServices/ApplicationServices.h>
+
+#import <mach-o/dyld.h>
+#import <stdlib.h>
+#import <string.h>
+
+#include <OpenGL/gl.h>
+#include <OpenGL/glext.h>
+
+PyObject * meth_load_opengl_function(PyObject * self, PyObject * arg) {
+    if (!PyUnicode_CheckExact(arg)) {
+        return NULL;
+    }
+    PyObject * prefix = PyUnicode_FromString("_");
+    PyObject * prefixed = PyNumber_Add(prefix, arg);
+    NSSymbol symbol = NULL;
+    const char * method = PyUnicode_AsUTF8(prefixed);
+    if (NSIsSymbolNameDefined(method)) {
+        symbol = NSLookupAndBindSymbol(method);
+    }
+    Py_DECREF(prefixed);
+    Py_DECREF(prefix);
+    return PyLong_FromVoidPtr(symbol ? NSAddressOfSymbol(symbol) : NULL);
+}
+
+#else
+
+PyObject * meth_load_opengl_function(PyObject * self, PyObject * arg) {
+    if (!PyUnicode_CheckExact(arg)) {
+        return NULL;
+    }
+    const char * name = PyUnicode_AsUTF8(arg);
+    return PyLong_FromVoidPtr(glXGetProcAddress((unsigned char *)name));
+}
+
+#endif
+
+PyMethodDef module_methods[] = {
+    {"load_opengl_function", (PyCFunction)meth_load_opengl_function, METH_O},
+    {},
+};
+
+PyModuleDef module_def = {PyModuleDef_HEAD_INIT, "windowed", NULL, -1, module_methods};
+
+extern "C" PyObject * PyInit_windowed() {
+    PyObject * module = PyModule_Create(&module_def);
+    return module;
+}

setup.py

@@ -50,6 +50,29 @@
     libraries=['EGL'],
 )
 
+if target == 'windows':
+    windowed = Extension(
+        name='glcontext.windowed',
+        sources=['glcontext/windowed.cpp'],
+        libraries=['opengl32'],
+    )
+
+if target == 'linux':
+    windowed = Extension(
+        name='glcontext.windowed',
+        sources=['glcontext/windowed.cpp'],
+        extra_compile_args=['-fpermissive'],
+        libraries=['GL'],
+    )
+
+if target == 'darwin':
+    windowed = Extension(
+        name='glcontext.windowed',
+        sources=['glcontext/windowed.cpp'],
+        extra_compile_args=['-fpermissive', '-Wno-deprecated-declarations'],
+        extra_link_args=['-framework', 'OpenGL', '-Wno-deprecated'],
+    )
+
 darwin = Extension(
     name='glcontext.darwin',
     sources=['glcontext/darwin.cpp'],
@@ -58,9 +81,9 @@
 )
 
 ext_modules = {
-    'windows': [wgl],
-    'linux': [x11, egl, headless],
-    'darwin': [darwin],
+    'windows': [wgl, windowed],
+    'linux': [x11, egl, headless, windowed],
+    'darwin': [darwin, windowed],
 }
 
 setup(