/**************************************************************************
 *
 * Copyright 2009 VMware, Inc.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sub license, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice (including the
 * next paragraph) shall be included in all copies or substantial portions
 * of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
 * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 **************************************************************************/

#include "state_tracker/drm_api.h"

#include "util/u_memory.h"
#include "identity/id_drm.h"
#include "identity/id_public.h"
#include "identity/id_screen.h"
#include "identity/id_objects.h"

struct identity_drm_api
{
   struct drm_api base;

   struct drm_api *api;
};

static INLINE struct identity_drm_api *
identity_drm_api(struct drm_api *_api)
{
   return (struct identity_drm_api *)_api;
}

static struct pipe_screen *
identity_drm_create_screen(struct drm_api *_api, int fd,
                           struct drm_create_screen_arg *arg)
{
   struct identity_drm_api *id_api = identity_drm_api(_api);
   struct drm_api *api = id_api->api;
   struct pipe_screen *screen;

   if (arg && arg->mode != DRM_CREATE_NORMAL)
      return NULL;

   screen = api->create_screen(api, fd, arg);

   return identity_screen_create(screen);
};

static struct pipe_context *
identity_drm_create_context(struct drm_api *_api,
                            struct pipe_screen *_screen)
{
   struct identity_screen *id_screen = identity_screen(_screen);
   struct identity_drm_api *id_api = identity_drm_api(_api);
   struct pipe_screen *screen = id_screen->screen;
   struct drm_api *api = id_api->api;
   struct pipe_context *pipe;

   pipe = api->create_context(api, screen);

   pipe = identity_context_create(_screen, pipe);

   return pipe;
};

static boolean
identity_drm_buffer_from_texture(struct drm_api *_api,
                                 struct pipe_texture *_texture,
                                 struct pipe_buffer **_buffer,
                                 unsigned *stride)
{
   struct identity_texture *id_texture = identity_texture(_texture);
   struct identity_drm_api *id_api = identity_drm_api(_api);
   struct pipe_texture *texture = id_texture->texture;
   struct drm_api *api = id_api->api;
   struct pipe_buffer *buffer = NULL;
   boolean result;

   result = api->buffer_from_texture(api, texture, &buffer, stride);

   if (result && _buffer)
      buffer = identity_buffer_create(identity_screen(texture->screen), buffer);

   if (_buffer)
      *_buffer = buffer;
   else
      pipe_buffer_reference(&buffer, NULL);

   return result;
}

static struct pipe_buffer *
identity_drm_buffer_from_handle(struct drm_api *_api,
                                struct pipe_screen *_screen,
                                const char *name,
                                unsigned handle)
{
   struct identity_screen *id_screen = identity_screen(_screen);
   struct identity_drm_api *id_api = identity_drm_api(_api);
   struct pipe_screen *screen = id_screen->screen;
   struct drm_api *api = id_api->api;
   struct pipe_buffer *result;

   result = api->buffer_from_handle(api, screen, name, handle);

   result = identity_buffer_create(identity_screen(_screen), result);

   return result;
}

static boolean
identity_drm_handle_from_buffer(struct drm_api *_api,
                                struct pipe_screen *_screen,
                                struct pipe_buffer *_buffer,
                                unsigned *handle)
{
   struct identity_screen *id_screen = identity_screen(_screen);
   struct identity_buffer *id_buffer = identity_buffer(_buffer);
   struct identity_drm_api *id_api = identity_drm_api(_api);
   struct pipe_screen *screen = id_screen->screen;
   struct pipe_buffer *buffer = id_buffer->buffer;
   struct drm_api *api = id_api->api;

   return api->handle_from_buffer(api, screen, buffer, handle);
}

static boolean
identity_drm_global_handle_from_buffer(struct drm_api *_api,
                                       struct pipe_screen *_screen,
                                       struct pipe_buffer *_buffer,
                                       unsigned *handle)
{
   struct identity_screen *id_screen = identity_screen(_screen);
   struct identity_buffer *id_buffer = identity_buffer(_buffer);
   struct identity_drm_api *id_api = identity_drm_api(_api);
   struct pipe_screen *screen = id_screen->screen;
   struct pipe_buffer *buffer = id_buffer->buffer;
   struct drm_api *api = id_api->api;

   return api->global_handle_from_buffer(api, screen, buffer, handle);
}

static void
identity_drm_destroy(struct drm_api *_api)
{
   struct identity_drm_api *id_api = identity_drm_api(_api);
   struct drm_api *api = id_api->api;
   api->destroy(api);

   free(id_api);
}

struct drm_api *
identity_drm_create(struct drm_api *api)
{
   struct identity_drm_api *id_api = CALLOC_STRUCT(identity_drm_api);

   if (!id_api)
      return NULL;

   id_api->base.create_screen = identity_drm_create_screen;
   id_api->base.create_context = identity_drm_create_context;
   id_api->base.buffer_from_texture = identity_drm_buffer_from_texture;
   id_api->base.buffer_from_handle = identity_drm_buffer_from_handle;
   id_api->base.handle_from_buffer = identity_drm_handle_from_buffer;
   id_api->base.global_handle_from_buffer = identity_drm_global_handle_from_buffer;
   id_api->base.destroy = identity_drm_destroy;
   id_api->api = api;

   return &id_api->base;
}