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#include "../include/mgl/gl.h"
#include <dlfcn.h>
/*#include <GL/gl.h>*/
#include <stdio.h>
typedef struct {
void **func;
const char *name;
} dlsym_assign;
static void* dlsym_print_fail(void *handle, const char *name) {
dlerror();
void *sym = dlsym(handle, name);
char *err_str = dlerror();
if(!sym)
fprintf(stderr, "dlsym(handle, \"%s\") failed, error: %s\n", name, err_str ? err_str : "(null)");
return sym;
}
int mgl_gl_load(mgl_gl *self) {
const char *gl_path = "/usr/lib/libOpenGL.so.0";
self->handle = dlopen(gl_path, RTLD_LAZY);
if(!self->handle) {
fprintf(stderr, "dlopen(\"%s\", RTLD_LAZY) failed\n", gl_path);
return -1;
}
const dlsym_assign assign[] = {
{ &self->glViewport, "glViewport" },
{ &self->glClearColor, "glClearColor" },
{ &self->glClear, "glClear" },
{ NULL, NULL }
};
for(int i = 0; assign[i].func; ++i) {
*assign[i].func = dlsym_print_fail(self->handle, assign[i].name);
if(!assign[i].func) {
mgl_gl_unload(self);
return -1;
}
}
return 0;
}
void mgl_gl_unload(mgl_gl *self) {
if(self->handle) {
dlclose(self->handle);
self->handle = NULL;
}
}
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