/*

 * va_wayland_emgd.c - Wayland/EMGD helpers

 *

 * Copyright (c) 2012 Intel Corporation. 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 INTEL 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 "sysdeps.h"

#include <unistd.h>

#include <dlfcn.h>

#include "va_drmcommon.h"

#include "va_wayland_emgd.h"

#include "va_wayland_private.h"

/* XXX: Wayland/EMGD support currently lives in libwayland-emgd.so.* library */

#define LIBWAYLAND_EMGD_NAME "libwayland-emgd.so.1"

typedef struct va_wayland_emgd_context {

    struct va_wayland_context   base;

    void                       *handle;

    struct wl_emgd             *emgd;

    void                       *emgd_interface;

    unsigned int                is_created      : 1;

    struct wl_registry         *registry;

} VADisplayContextWaylandEMGD;

static inline void

wl_emgd_destroy(struct wl_emgd *emgd)

{

    wl_proxy_destroy((struct wl_proxy *)emgd);

}

static VAStatus

va_DisplayContextGetDriverName(

    VADisplayContextP pDisplayContext,

    char            **driver_name_ptr

)

{

    *driver_name_ptr = strdup("emgd");

    return VA_STATUS_SUCCESS;

}

void

va_wayland_emgd_destroy(VADisplayContextP pDisplayContext)

{

    VADriverContextP const ctx = pDisplayContext->pDriverContext;

    VADisplayContextWaylandEMGD * const wl_emgd_ctx = pDisplayContext->opaque;

    struct drm_state * const drm_state = ctx->drm_state;

    if (wl_emgd_ctx->emgd) {

        wl_emgd_destroy(wl_emgd_ctx->emgd);

        wl_emgd_ctx->emgd = NULL;

    }

    wl_emgd_ctx->is_created = 0;

    if (wl_emgd_ctx->handle) {

        dlclose(wl_emgd_ctx->handle);

        wl_emgd_ctx->handle = NULL;

    }

    if (drm_state) {

        if (drm_state->fd >= 0) {

            close(drm_state->fd);

            drm_state->fd = -1;

        }

        free(ctx->drm_state);

        ctx->drm_state = NULL;

    }

}

static void

registry_handle_global(

    void               *data,

    struct wl_registry *registry,

    uint32_t            id,

    const char         *interface,

    uint32_t            version

)

{

    VADisplayContextWaylandEMGD *wl_emgd_ctx = data;

    if (strcmp(interface, "wl_emgd") == 0) {

        wl_emgd_ctx->emgd =

            wl_registry_bind(registry, id, wl_emgd_ctx->emgd_interface, 1);

    }

}

static const struct wl_registry_listener registry_listener = {

    registry_handle_global,

    NULL,

};

bool

va_wayland_emgd_create(VADisplayContextP pDisplayContext)

{

    VADriverContextP const ctx = pDisplayContext->pDriverContext;

    VADisplayContextWaylandEMGD *wl_emgd_ctx;

    struct drm_state *drm_state;

    wl_emgd_ctx = malloc(sizeof(*wl_emgd_ctx));

    if (!wl_emgd_ctx)

        return false;

    wl_emgd_ctx->base.destroy           = va_wayland_emgd_destroy;

    wl_emgd_ctx->handle                 = NULL;

    wl_emgd_ctx->emgd                   = NULL;

    wl_emgd_ctx->emgd_interface         = NULL;

    wl_emgd_ctx->is_created             = 0;

    pDisplayContext->opaque             = wl_emgd_ctx;

    pDisplayContext->vaGetDriverName    = va_DisplayContextGetDriverName;

    drm_state = calloc(1, sizeof(struct drm_state));

    if (!drm_state)

        return false;

    drm_state->fd        = -1;

    drm_state->auth_type = 0;

    ctx->drm_state       = drm_state;

    wl_emgd_ctx->handle = dlopen(LIBWAYLAND_EMGD_NAME, RTLD_LAZY|RTLD_LOCAL);

    if (!wl_emgd_ctx->handle)

        return false;

    wl_emgd_ctx->emgd_interface =

        dlsym(wl_emgd_ctx->handle, "wl_emgd_interface");

    if (!wl_emgd_ctx->emgd_interface)

        return false;

    wl_emgd_ctx->registry = wl_display_get_registry(ctx->native_dpy);

    wl_registry_add_listener(wl_emgd_ctx->registry, &registry_listener, wl_emgd_ctx);

    wl_display_roundtrip(ctx->native_dpy);

    /* registry_handle_global should have been called by the

     * wl_display_roundtrip above

     */

    if (!wl_emgd_ctx->emgd)

        return false;

    return true;

}