/* Caolan McNamara
 * gcc -g -fpic -shared -o libpixmap.so pixmap.c
 *
 * export LD_PRELOAD=`pwd`/libpixmap.so
 */

#include <dlfcn.h>
#include <stdio.h>

typedef void* Pixmap;
typedef void* Drawable;
typedef void* Display;

void* thing()
{
    static void* handle;
    if (!handle)
        handle = dlopen("libX11.so", RTLD_LAZY);
    return handle;
}

Pixmap XCreatePixmap(Display *display, Drawable d, unsigned int width, unsigned int height, unsigned int depth)
{
    static Pixmap (*create)(Display *, Drawable, unsigned int, unsigned int, unsigned int);
    Pixmap foo;
    if (!create)
    {
        void* handle = thing();
        create = (void* (*)(Display*, void*, unsigned int, unsigned int, unsigned int))dlsym(handle, "XCreatePixmap");
    }
    foo = (*create)(display, d, width, height, depth);
    fprintf(stderr, "%p\tCREATED\n", foo);
    return foo;
}

int XFreePixmap(Display *display, Pixmap pixmap)
{
    static int (*destroy)(Display *, Pixmap);
    if (!destroy)
    {
        void* handle = thing();
        destroy = (int (*)(void**, void*))dlsym(handle, "XFreePixmap");
    }
    fprintf(stderr, "%p\tDESTROY\n", pixmap);
    return (*destroy)(display, pixmap);
}