/*

 * GStreamer

 * Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>

 * Copyright (C) 2012 Matthew Waters <ystreet00@gmail.com>

 * Copyright (C) 2015 Freescale Semiconductor <b55597@freescale.com>

 * Copyright (C) 2017 Sebastian Dröge <sebastian@centricular.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.

 */

#include "../gstgl_fwd.h"

#include <gst/gl/gstglcontext.h>

#include <gst/gl/gstglfuncs.h>

#include "gstglwindow_viv_fb_egl.h"

#include "../gstglwindow_private.h"

#define GST_CAT_DEFAULT gst_gl_window_debug

#define gst_gl_window_viv_fb_egl_parent_class parent_class

G_DEFINE_TYPE (GstGLWindowVivFBEGL, gst_gl_window_viv_fb_egl,

    GST_TYPE_GL_WINDOW);

static guintptr gst_gl_window_viv_fb_egl_get_window_handle (GstGLWindow *

    window);

static guintptr gst_gl_window_viv_fb_egl_get_display (GstGLWindow * window);

static void gst_gl_window_viv_fb_egl_set_window_handle (GstGLWindow * window,

    guintptr handle);

static void gst_gl_window_viv_fb_egl_close (GstGLWindow * window);

static gboolean gst_gl_window_viv_fb_egl_open (GstGLWindow * window,

    GError ** error);

static void gst_gl_window_viv_fb_egl_draw (GstGLWindow * window);

static gboolean

gst_gl_window_viv_fb_egl_set_render_rectangle (GstGLWindow * window,

    gint x, gint y, gint width, gint height);

static void

gst_gl_window_viv_fb_egl_class_init (GstGLWindowVivFBEGLClass * klass)

{

  GstGLWindowClass *window_class = (GstGLWindowClass *) klass;

  window_class->get_window_handle =

      GST_DEBUG_FUNCPTR (gst_gl_window_viv_fb_egl_get_window_handle);

  window_class->get_display =

      GST_DEBUG_FUNCPTR (gst_gl_window_viv_fb_egl_get_display);

  window_class->set_window_handle =

      GST_DEBUG_FUNCPTR (gst_gl_window_viv_fb_egl_set_window_handle);

  window_class->close = GST_DEBUG_FUNCPTR (gst_gl_window_viv_fb_egl_close);

  window_class->open = GST_DEBUG_FUNCPTR (gst_gl_window_viv_fb_egl_open);

  window_class->draw = GST_DEBUG_FUNCPTR (gst_gl_window_viv_fb_egl_draw);

  window_class->set_render_rectangle =

      GST_DEBUG_FUNCPTR (gst_gl_window_viv_fb_egl_set_render_rectangle);

}

static void

gst_gl_window_viv_fb_egl_init (GstGLWindowVivFBEGL * window)

{

}

/* Must be called in the gl thread */

GstGLWindowVivFBEGL *

gst_gl_window_viv_fb_egl_new (GstGLDisplay * display)

{

  GstGLWindowVivFBEGL *window;

  if ((gst_gl_display_get_handle_type (display) & GST_GL_DISPLAY_TYPE_VIV_FB) ==

      0)

    /* we require a Vivante FB display to create windows */

    return NULL;

  window = g_object_new (GST_TYPE_GL_WINDOW_VIV_FB_EGL, NULL);

  gst_object_ref_sink (window);

  return window;

}

static void

gst_gl_window_viv_fb_egl_close (GstGLWindow * window)

{

  GstGLWindowVivFBEGL *window_egl = GST_GL_WINDOW_VIV_FB_EGL (window);

  if (window_egl->win_id && !window_egl->external_window) {

    fbDestroyWindow (window_egl->win_id);

    window_egl->win_id = 0;

  }

  GST_GL_WINDOW_CLASS (parent_class)->close (window);

}

static guintptr

gst_gl_window_viv_fb_egl_get_display (GstGLWindow * window)

{

  return gst_gl_display_get_handle (window->display);

}

static gboolean

gst_gl_window_viv_fb_egl_open (GstGLWindow * window, GError ** error)

{

  GstGLWindowVivFBEGL *window_egl = GST_GL_WINDOW_VIV_FB_EGL (window);

  EGLNativeDisplayType display;

  display = (EGLNativeDisplayType) gst_gl_window_get_display (window);

  window_egl->win_id = fbCreateWindow (display, -1, -1, 0, 0);

  window_egl->external_window = FALSE;

  if (!window_egl->win_id) {

    g_set_error (error, GST_GL_WINDOW_ERROR,

        GST_GL_WINDOW_ERROR_RESOURCE_UNAVAILABLE, "Can't create window");

    return FALSE;

  }

  fbGetWindowGeometry (window_egl->win_id, NULL, NULL,

      &window_egl->window_width, &window_egl->window_height);

  window_egl->render_rectangle.x = 0;

  window_egl->render_rectangle.y = 0;

  window_egl->render_rectangle.w = window_egl->window_width;

  window_egl->render_rectangle.h = window_egl->window_height;

  gst_gl_window_resize (window, window_egl->window_width,

      window_egl->window_height);

  GST_DEBUG

      ("Opened Vivante FB display succesfully, resolution is (%dx%d), display %p, window %p.",

      window_egl->window_width, window_egl->window_height, (gpointer) display,

      (gpointer) window_egl->win_id);

  return GST_GL_WINDOW_CLASS (parent_class)->open (window, error);

}

static guintptr

gst_gl_window_viv_fb_egl_get_window_handle (GstGLWindow * window)

{

  return (guintptr) GST_GL_WINDOW_VIV_FB_EGL (window)->win_id;

}

static void

gst_gl_window_viv_fb_egl_set_window_handle (GstGLWindow * window,

    guintptr handle)

{

  GstGLWindowVivFBEGL *window_egl = GST_GL_WINDOW_VIV_FB_EGL (window);

  gint width, height;

  if (window_egl->win_id)

    fbDestroyWindow (window_egl->win_id);

  window_egl->win_id = (EGLNativeWindowType) handle;

  window_egl->external_window = handle != 0;

  fbGetWindowGeometry (window_egl->win_id, NULL, NULL, &width, &height);

  gst_gl_window_resize (window, width, height);

}

static void

draw_cb (gpointer data)

{

  GstGLWindowVivFBEGL *window_egl = data;

  GstGLWindow *window = GST_GL_WINDOW (window_egl);

  GstGLContext *context = gst_gl_window_get_context (window);

  const GstGLFuncs *gl;

  gint viewport_dim[4];

  gl = context->gl_vtable;

  if (window->queue_resize) {

    guint width, height;

    gst_gl_window_get_surface_dimensions (window, &width, &height);

    gst_gl_window_resize (window, width, height);

    gl->GetIntegerv (GL_VIEWPORT, viewport_dim);

    viewport_dim[0] += window_egl->render_rectangle.x;

    viewport_dim[1] += window_egl->render_rectangle.y;

    gl->Viewport (viewport_dim[0],

        viewport_dim[1], viewport_dim[2], viewport_dim[3]);

  }

  if (window->draw)

    window->draw (window->draw_data);

  gst_gl_context_swap_buffers (context);

  gst_object_unref (context);

}

static void

gst_gl_window_viv_fb_egl_draw (GstGLWindow * window)

{

  gst_gl_window_send_message (window, (GstGLWindowCB) draw_cb, window);

}

typedef struct

{

  GstGLWindowVivFBEGL *window_egl;

  GstVideoRectangle rect;

} SetRenderRectangleData;

static void

_free_set_render_rectangle (SetRenderRectangleData * render)

{

  if (render) {

    if (render->window_egl)

      gst_object_unref (render->window_egl);

    g_free (render);

  }

}

static void

_calculate_viewport_coordinates (GstGLWindowVivFBEGL * window_egl,

    GstVideoRectangle * req, GstVideoRectangle * result)

{

  result->x = req->x;

  result->y = window_egl->window_height - (req->y + req->h);

  result->w = req->w;

  result->h = req->h;

}

static void

_set_render_rectangle (gpointer data)

{

  SetRenderRectangleData *render = data;

  GstGLWindowVivFBEGL *window_egl = render->window_egl;

  GstGLWindow *window = GST_GL_WINDOW (window_egl);

  GST_LOG_OBJECT (render->window_egl, "setting render rectangle %i,%i+%ix%i",

      render->rect.x, render->rect.y, render->rect.w, render->rect.h);

  _calculate_viewport_coordinates (window_egl, &render->rect,

      &window_egl->render_rectangle);

  gst_gl_window_resize (window, render->rect.w, render->rect.h);

  window->queue_resize = TRUE;

}

static gboolean

gst_gl_window_viv_fb_egl_set_render_rectangle (GstGLWindow * window,

    gint x, gint y, gint width, gint height)

{

  GstGLWindowVivFBEGL *window_egl = GST_GL_WINDOW_VIV_FB_EGL (window);

  SetRenderRectangleData *render;

  render = g_new0 (SetRenderRectangleData, 1);

  render->window_egl = gst_object_ref (window_egl);

  render->rect.x = x;

  render->rect.y = y;

  render->rect.w = width;

  render->rect.h = height;

  gst_gl_window_send_message_async (window,

      (GstGLWindowCB) _set_render_rectangle, render,

      (GDestroyNotify) _free_set_render_rectangle);

  return TRUE;

}