Freeglut hell

subprojects/cimgui_dep/imgui/backends/GL/freeglut.cpp

@@ -0,0 +1,38 @@
+#include "freeglut.h"
+
+#include <Windows.h>
+
+HMODULE hFreeGLUT = 0;
+
+#define WRAP(procName, ret)                                   \
+    if (!hFreeGLUT) hFreeGLUT = LoadLibraryA("freeglut.dll"); \
+    if (hFreeGLUT == INVALID_HANDLE_VALUE) return ret;        \
+    return ((decltype(procName)*)(GetProcAddress(hFreeGLUT, #procName)))
+
+void FGAPIENTRY glutPassiveMotionFunc(void (*callback)(int, int)) {
+    WRAP(glutPassiveMotionFunc, )(callback);
+}
+void FGAPIENTRY glutKeyboardUpFunc(void (*callback)(unsigned char, int, int)) {
+    WRAP(glutKeyboardUpFunc, )(callback);
+}
+void FGAPIENTRY glutMouseFunc(void (*callback)(int, int, int, int)) {
+    WRAP(glutMouseFunc, )(callback);
+}
+void FGAPIENTRY glutKeyboardFunc(void (*callback)(unsigned char, int, int)) {
+    WRAP(glutKeyboardFunc, )(callback);
+}
+void FGAPIENTRY glutSpecialFunc(void (*callback)(int, int, int)) {
+    WRAP(glutSpecialFunc, )(callback);
+}
+void FGAPIENTRY glutMotionFunc(void (*callback)(int, int)) { WRAP(glutMotionFunc, )(callback); }
+int FGAPIENTRY glutGet(unsigned int query) { WRAP(glutGet, -1)(query); }
+void FGAPIENTRY glutReshapeFunc(void (*callback)(int, int)) { WRAP(glutReshapeFunc, )(callback); }
+int FGAPIENTRY glutGetModifiers(void) { WRAP(glutGetModifiers, -1)(); }
+
+void FGAPIENTRY glutSpecialUpFunc(void (*callback)(int, int, int)) {
+    WRAP(glutSpecialUpFunc, )(callback);
+}
+
+void FGAPIENTRY glutMouseWheelFunc(void (*callback)(int, int, int, int)) {
+    WRAP(glutMouseWheelFunc, )(callback);
+}