/*
 * Compile:
 * gcc egl-glx-driver-bug33758.c -lEGL -o egl-glx
 *
 */

#include <EGL/egl.h>
#include <stdlib.h>

struct egl_test {
  EGLDisplay edpy;
  EGLContext egl_context;
  void      *egl_config;
  EGLSurface egl_surface;
};

static int
get_display (struct egl_test *test)
{
  EGLBoolean status;
  EGLint major, minor;

  test->edpy = eglGetDisplay(EGL_DEFAULT_DISPLAY);

  if (test->edpy == EGL_NO_DISPLAY)
    return -1;

  status = eglInitialize (test->edpy,
			  &major,
			  &minor);
  if (status != EGL_TRUE)
    return -2;

  return 0;
}

static int
make_dummy_surface (struct egl_test *test)
{
  static const EGLint attrs[] = {
    EGL_WIDTH, 1,
    EGL_HEIGHT, 1,
//    EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,
    EGL_NONE };
  EGLint num_configs;

  eglGetConfigs(test->edpy,
                &test->egl_config, 1, &num_configs);
  if (num_configs < 1)
    return -1;

  test->egl_surface =
    eglCreatePbufferSurface(test->edpy,
                            test->egl_config,
                            attrs);

  if (test->egl_surface == EGL_NO_SURFACE)
    return -2;

  return 0;
}

static int
create_context (struct egl_test *test)
{
  static const EGLint *attribs = NULL;

  test->egl_context =
        eglCreateContext (test->edpy,
                          test->egl_config,
                          EGL_NO_CONTEXT,
                          attribs);
  if (test->egl_context == EGL_NO_CONTEXT)
    return -1;

  if (!eglMakeCurrent(test->edpy,
                      test->egl_surface,
                      test->egl_surface,
                      test->egl_context))
    return -2;

  return 0;
}

static int
teardown (struct egl_test *test)
{
  if (!eglDestroyContext(test->edpy, test->egl_context))
    return -1;
  if (!eglDestroySurface(test->edpy, test->egl_surface))
    return -2;
  if (!eglMakeCurrent(test->edpy, EGL_NO_SURFACE, EGL_NO_SURFACE,
                      EGL_NO_CONTEXT))
    return -3;
  if (!eglTerminate(test->edpy))
    return -4;
  return 0;
}

int main(int argc, char **argv)
{
  struct egl_test test;

  if (setenv("EGL_DRIVER", "egl_glx", /*overwrite=*/ 1) < 0)
    return 1;

  if (get_display(&test) < 0)
    return 2;

  eglBindAPI(EGL_OPENGL_API);

  if (make_dummy_surface(&test) < 0)
    return 3;

  if (create_context(&test) < 0)
    return 4;

  if (teardown(&test) < 0)
    return 5;

  return 0;
}