gstreamer/gst-libs/gst/gl/wayland/gstglwindow_wayland_egl.c

/*
 * GStreamer
 * Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
 * Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#define GLIB_DISABLE_DEPRECATION_WARNINGS

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "wayland_event_source.h"

#include "gstglwindow_wayland_egl.h"

const gchar *WlEGLErrorString ();

#define GST_CAT_DEFAULT gst_gl_window_wayland_egl_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);

#define DEBUG_INIT \
  GST_DEBUG_CATEGORY_GET (GST_CAT_DEFAULT, "glwindow");
#define gst_gl_window_wayland_egl_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstGLWindowWaylandEGL, gst_gl_window_wayland_egl,
    GST_GL_TYPE_WINDOW, DEBUG_INIT);

static guintptr gst_gl_window_wayland_egl_get_gl_context (GstGLWindow * window);
static gboolean gst_gl_window_wayland_egl_activate (GstGLWindow * window,
    gboolean activate);
static void gst_gl_window_wayland_egl_set_window_handle (GstGLWindow * window,
    guintptr handle);
static void gst_gl_window_wayland_egl_draw (GstGLWindow * window, guint width,
    guint height);
static void gst_gl_window_wayland_egl_run (GstGLWindow * window);
static void gst_gl_window_wayland_egl_quit (GstGLWindow * window,
    GstGLWindowCB callback, gpointer data);
static void gst_gl_window_wayland_egl_send_message (GstGLWindow * window,
    GstGLWindowCB callback, gpointer data);
static void gst_gl_window_wayland_egl_destroy_context (GstGLWindowWaylandEGL *
    window_egl);
static gboolean gst_gl_window_wayland_egl_create_context (GstGLWindowWaylandEGL
    * window_egl, GstGLRendererAPI render_api, guintptr external_gl_context);

static void gst_gl_window_wayland_egl_finalize (GObject * object);

static void
handle_ping (void *data, struct wl_shell_surface *shell_surface,
    uint32_t serial)
{
  wl_shell_surface_pong (shell_surface, serial);
}

static void
handle_configure (void *data, struct wl_shell_surface *shell_surface,
    uint32_t edges, int32_t width, int32_t height)
{
  GstGLWindowWaylandEGL *window_egl = data;
  struct window window = window_egl->window;

  if (window.native)
    wl_egl_window_resize (window.native, width, height, 0, 0);

  window.window_width = width;
  window.window_height = height;
}

static void
handle_popup_done (void *data, struct wl_shell_surface *shell_surface)
{
}

static const struct wl_shell_surface_listener shell_surface_listener = {
  handle_ping,
  handle_configure,
  handle_popup_done
};

static gboolean
create_surface (GstGLWindowWaylandEGL * window_egl)
{
  struct display display = window_egl->display;
  struct window window = window_egl->window;
  EGLBoolean ret;

  window.surface = wl_compositor_create_surface (display.compositor);
  window.shell_surface = wl_shell_get_shell_surface (display.shell,
      window.surface);

  wl_shell_surface_add_listener (window.shell_surface,
      &shell_surface_listener, window_egl);

  if (!window.window_width)
    window.window_width = 320;
  if (!window.window_height)
    window.window_height = 240;

  window.native =
      wl_egl_window_create (window.surface, window.window_width,
      window.window_height);
  window_egl->egl_surface =
      eglCreateWindowSurface (window_egl->egl_display, window_egl->egl_config,
      window.native, NULL);

  wl_shell_surface_set_title (window.shell_surface, "OpenGL Renderer");

  ret =
      eglMakeCurrent (window_egl->egl_display, window_egl->egl_surface,
      window_egl->egl_surface, window_egl->egl_context);

  wl_shell_surface_set_toplevel (window.shell_surface);
  handle_configure (window_egl, window.shell_surface, 0,
      window_egl->window.window_width, window_egl->window.window_height);

  return ret == EGL_TRUE;
}

static void
destroy_surface (GstGLWindowWaylandEGL * window_egl)
{
  if (window_egl->window.native)
    wl_egl_window_destroy (window_egl->window.native);

  if (window_egl->window.shell_surface)
    wl_shell_surface_destroy (window_egl->window.shell_surface);

  if (window_egl->window.surface)
    wl_surface_destroy (window_egl->window.surface);

  if (window_egl->window.callback)
    wl_callback_destroy (window_egl->window.callback);
}

static void
registry_handle_global (void *data, struct wl_registry *registry,
    uint32_t name, const char *interface, uint32_t version)
{
  struct display *d = data;

  if (g_strcmp0 (interface, "wl_compositor") == 0) {
    d->compositor =
        wl_registry_bind (registry, name, &wl_compositor_interface, 1);
  } else if (g_strcmp0 (interface, "wl_shell") == 0) {
    d->shell = wl_registry_bind (registry, name, &wl_shell_interface, 1);
/*  } else if (strcmp(interface, "wl_seat") == 0) {
    d->seat = wl_registry_bind(registry, name, &wl_seat_interface, 1);
    wl_seat_add_listener(d->seat, &seat_listener, d);
*/ } else if (g_strcmp0 (interface, "wl_shm") == 0) {
    d->shm = wl_registry_bind (registry, name, &wl_shm_interface, 1);
    d->cursor_theme = wl_cursor_theme_load (NULL, 32, d->shm);
    d->default_cursor =
        wl_cursor_theme_get_cursor (d->cursor_theme, "left_ptr");
  }
}

static const struct wl_registry_listener registry_listener = {
  registry_handle_global
};

static void
gst_gl_window_wayland_egl_class_init (GstGLWindowWaylandEGLClass * klass)
{
  GObjectClass *object_class = (GObjectClass *) klass;
  GstGLWindowClass *window_class = (GstGLWindowClass *) klass;

  window_class->get_gl_context =
      GST_DEBUG_FUNCPTR (gst_gl_window_wayland_egl_get_gl_context);
  window_class->activate =
      GST_DEBUG_FUNCPTR (gst_gl_window_wayland_egl_activate);
  window_class->set_window_handle =
      GST_DEBUG_FUNCPTR (gst_gl_window_wayland_egl_set_window_handle);
  window_class->draw_unlocked =
      GST_DEBUG_FUNCPTR (gst_gl_window_wayland_egl_draw);
  window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_wayland_egl_draw);
  window_class->run = GST_DEBUG_FUNCPTR (gst_gl_window_wayland_egl_run);
  window_class->quit = GST_DEBUG_FUNCPTR (gst_gl_window_wayland_egl_quit);
  window_class->send_message =
      GST_DEBUG_FUNCPTR (gst_gl_window_wayland_egl_send_message);

  object_class->finalize = gst_gl_window_wayland_egl_finalize;
}

static void
gst_gl_window_wayland_egl_init (GstGLWindowWaylandEGL * window)
{
}

/* Must be called in the gl thread */
GstGLWindowWaylandEGL *
gst_gl_window_wayland_egl_new (GstGLRendererAPI render_api,
    guintptr external_gl_context)
{
  GstGLWindowWaylandEGL *window =
      g_object_new (GST_GL_TYPE_WINDOW_WAYLAND_EGL, NULL);

  gst_gl_window_set_need_lock (GST_GL_WINDOW (window), FALSE);

  window->display.display = wl_display_connect (NULL);
  g_assert (window->display.display);

  window->display.registry = wl_display_get_registry (window->display.display);
  wl_registry_add_listener (window->display.registry, &registry_listener,
      &window->display);

  wl_display_dispatch (window->display.display);

//  init_egl(&display, window.opaque);
  create_surface (window);
//  init_gl(&window);

  window->display.cursor_surface =
      wl_compositor_create_surface (window->display.compositor);

  window->wl_source = wayland_event_source_new (window->display.display);
  window->main_context = g_main_context_new ();
  window->loop = g_main_loop_new (window->main_context, FALSE);

  g_source_attach (window->wl_source, window->main_context);

  gst_gl_window_wayland_egl_create_context (window, render_api,
      external_gl_context);

  return window;
}

static void
gst_gl_window_wayland_egl_finalize (GObject * object)
{
  GstGLWindowWaylandEGL *window_egl;

  window_egl = GST_GL_WINDOW_WAYLAND_EGL (object);

  gst_gl_window_wayland_egl_destroy_context (window_egl);
//  fini_egl(&display);

  wl_surface_destroy (window_egl->display.cursor_surface);
  if (window_egl->display.cursor_theme)
    wl_cursor_theme_destroy (window_egl->display.cursor_theme);

  if (window_egl->display.shell)
    wl_shell_destroy (window_egl->display.shell);

  if (window_egl->display.compositor)
    wl_compositor_destroy (window_egl->display.compositor);

  wl_display_flush (window_egl->display.display);
  wl_display_disconnect (window_egl->display.display);

  G_OBJECT_CLASS (parent_class)->finalize (object);
}

static gboolean
gst_gl_window_wayland_egl_create_context (GstGLWindowWaylandEGL * window_egl,
    GstGLRendererAPI render_api, guintptr external_gl_context)
{
  EGLint config_attrib[] = {
    EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
    EGL_RED_SIZE, 1,
    EGL_GREEN_SIZE, 1,
    EGL_BLUE_SIZE, 1,
    EGL_ALPHA_SIZE, 1,
    EGL_DEPTH_SIZE, 1,
    EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
    EGL_NONE
  };

  EGLint context_attrib[] = {
    EGL_CONTEXT_CLIENT_VERSION, 2,
    EGL_NONE
  };

  EGLint majorVersion;
  EGLint minorVersion;
  EGLint numConfigs;

  window_egl->egl_display =
      eglGetDisplay ((EGLNativeDisplayType) window_egl->display.display);

  if (eglInitialize (window_egl->egl_display, &majorVersion, &minorVersion))
    GST_DEBUG ("egl initialized: %d.%d", majorVersion, minorVersion);
  else {
    GST_DEBUG ("failed to initialize egl %ld, %s",
        (gulong) window_egl->egl_display, WlEGLErrorString ());
    goto failure;
  }

  if (!eglBindAPI (EGL_OPENGL_ES_API)) {
    GST_WARNING ("failed to bind OpenGL|ES API");
    goto failure;
  }

  if (eglChooseConfig (window_egl->egl_display, config_attrib,
          &window_egl->egl_config, 1, &numConfigs))
    GST_DEBUG ("config set: %ld, %ld", (gulong) window_egl->egl_config,
        (gulong) numConfigs);
  else {
    GST_DEBUG ("failed to set config %ld, %s", (gulong) window_egl->egl_display,
        WlEGLErrorString ());
    goto failure;
  }

  GST_DEBUG ("about to create gl context");

  window_egl->egl_context =
      eglCreateContext (window_egl->egl_display, window_egl->egl_config,
      (EGLContext) external_gl_context, context_attrib);

  if (window_egl->egl_context != EGL_NO_CONTEXT)
    GST_DEBUG ("gl context created: %ld", (gulong) window_egl->egl_context);
  else {
    GST_DEBUG ("failed to create glcontext %ld, %ld, %s",
        (gulong) window_egl->egl_context, (gulong) window_egl->egl_display,
        WlEGLErrorString ());
    goto failure;
  }

  create_surface (window_egl);
/*  window_egl->egl_surface =
      eglCreateWindowSurface (window_egl->egl_display, window_egl->config,
      (EGLNativeWindowType) window_wayland_egl->internal_win_id, NULL);
  if (window_egl->egl_surface != EGL_NO_SURFACE)
    GST_DEBUG ("surface created: %ld", (gulong) window_egl->egl_surface);
  else {
    GST_DEBUG ("failed to create surface %ld, %ld, %ld, %s",
        (gulong) window_egl->egl_display, (gulong) window_egl->egl_surface,
        (gulong) window_egl->egl_display, WlEGLErrorString ());
    goto failure;
  }
*/

  return TRUE;

failure:
  return FALSE;
}

static void
gst_gl_window_wayland_egl_destroy_context (GstGLWindowWaylandEGL * window_egl)
{
  destroy_surface (window_egl);

  if (window_egl->egl_context)
    eglDestroyContext (window_egl->egl_display, window_egl->egl_context);

  if (window_egl->egl_display) {
    eglTerminate (window_egl->egl_display);
    eglReleaseThread ();
  }
}

static gboolean
gst_gl_window_wayland_egl_activate (GstGLWindow * window, gboolean activate)
{
  gboolean result;
  GstGLWindowWaylandEGL *window_egl;

  window_egl = GST_GL_WINDOW_WAYLAND_EGL (window);

  GST_DEBUG ("activate:%s", activate ? "TRUE" : "FALSE");

  if (activate)
    result = eglMakeCurrent (window_egl->egl_display, window_egl->egl_surface,
        window_egl->egl_surface, window_egl->egl_context);
  else
    result = eglMakeCurrent (window_egl->egl_display, EGL_NO_SURFACE,
        EGL_NO_SURFACE, EGL_NO_CONTEXT);

  return result;
}

static guintptr
gst_gl_window_wayland_egl_get_gl_context (GstGLWindow * window)
{
  return (guintptr) GST_GL_WINDOW_WAYLAND_EGL (window)->egl_context;
}

static void
gst_gl_window_wayland_egl_swap_buffers (GstGLWindow * window)
{
  GstGLWindowWaylandEGL *window_egl = GST_GL_WINDOW_WAYLAND_EGL (window);

  eglSwapBuffers (window_egl->egl_display, window_egl->egl_surface);
}

static void
gst_gl_window_wayland_egl_run (GstGLWindow * window)
{
  GstGLWindowWaylandEGL *window_egl;

  window_egl = GST_GL_WINDOW_WAYLAND_EGL (window);

  GST_LOG ("starting main loop");
  g_main_loop_run (window_egl->loop);
  GST_LOG ("exiting main loop");
}

static void
gst_gl_window_wayland_egl_quit (GstGLWindow * window, GstGLWindowCB callback,
    gpointer data)
{
  GstGLWindowWaylandEGL *window_egl;

  window_egl = GST_GL_WINDOW_WAYLAND_EGL (window);

  gst_gl_window_wayland_egl_send_message (window, callback, data);

  GST_LOG ("sending quit");

  g_main_loop_quit (window_egl->loop);

  GST_LOG ("quit sent");
}

typedef struct _GstGLMessage
{
  GMutex lock;
  GCond cond;
  gboolean fired;

  GstGLWindowCB callback;
  gpointer data;
} GstGLMessage;

static gboolean
_run_message (GstGLMessage * message)
{
  g_mutex_lock (&message->lock);

  if (message->callback)
    message->callback (message->data);

  message->fired = TRUE;
  g_cond_signal (&message->cond);
  g_mutex_unlock (&message->lock);

  return FALSE;
}

static void
gst_gl_window_wayland_egl_send_message (GstGLWindow * window,
    GstGLWindowCB callback, gpointer data)
{
  GstGLWindowWaylandEGL *window_egl;
  GstGLMessage message;

  window_egl = GST_GL_WINDOW_WAYLAND_EGL (window);
  message.callback = callback;
  message.data = data;
  message.fired = FALSE;
  g_mutex_init (&message.lock);
  g_cond_init (&message.cond);

  g_mutex_lock (&message.lock);

  g_main_context_invoke (window_egl->main_context, (GSourceFunc) _run_message,
      &message);

  while (!message.fired)
    g_cond_wait (&message.cond, &message.lock);
  g_mutex_unlock (&message.lock);
}

static void
gst_gl_window_wayland_egl_set_window_handle (GstGLWindow * window,
    guintptr handle)
{
}

struct draw
{
  GstGLWindowWaylandEGL *window;
  guint width, height;
};

static void
draw_cb (gpointer data)
{
  struct draw *draw_data = data;
  GstGLWindow *window = GST_GL_WINDOW (draw_data->window);

  if (window->draw)
    window->draw (window->draw_data);

  gst_gl_window_wayland_egl_swap_buffers (window);
}

static void
gst_gl_window_wayland_egl_draw (GstGLWindow * window, guint width, guint height)
{
  struct draw draw_data;

  draw_data.window = GST_GL_WINDOW_WAYLAND_EGL (window);
  draw_data.width = width;
  draw_data.height = height;

  gst_gl_window_send_message (window, (GstGLWindowCB) draw_cb, &draw_data);
}

const gchar *
WlEGLErrorString ()
{
  EGLint nErr = eglGetError ();
  switch (nErr) {
    case EGL_SUCCESS:
      return "EGL_SUCCESS";
    case EGL_BAD_DISPLAY:
      return "EGL_BAD_DISPLAY";
    case EGL_NOT_INITIALIZED:
      return "EGL_NOT_INITIALIZED";
    case EGL_BAD_ACCESS:
      return "EGL_BAD_ACCESS";
    case EGL_BAD_ALLOC:
      return "EGL_BAD_ALLOC";
    case EGL_BAD_ATTRIBUTE:
      return "EGL_BAD_ATTRIBUTE";
    case EGL_BAD_CONFIG:
      return "EGL_BAD_CONFIG";
    case EGL_BAD_CONTEXT:
      return "EGL_BAD_CONTEXT";
    case EGL_BAD_CURRENT_SURFACE:
      return "EGL_BAD_CURRENT_SURFACE";
    case EGL_BAD_MATCH:
      return "EGL_BAD_MATCH";
    case EGL_BAD_NATIVE_PIXMAP:
      return "EGL_BAD_NATIVE_PIXMAP";
    case EGL_BAD_NATIVE_WINDOW:
      return "EGL_BAD_NATIVE_WINDOW";
    case EGL_BAD_PARAMETER:
      return "EGL_BAD_PARAMETER";
    case EGL_BAD_SURFACE:
      return "EGL_BAD_SURFACE";
    default:
      return "unknown";
  }
}