/*
 * YaGL
 *
 * Copyright (c) 2012 Samsung Electronics Co., Ltd. All rights reserved.
 *
 * Contact :
 * Stanislav Vorobiov <s.vorobiov@samsung.com>
 * Jinhyung Jo <jinhyung.jo@samsung.com>
 * YeongKyoon Lee <yeongkyoon.lee@samsung.com>
 *
 * 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, sublicense, 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 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 NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS 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.
 *
 * Contributors:
 * - S-Core Co., Ltd
 *
 */

#include "yagl_native_platform.h"
#ifdef YAGL_PLATFORM_X11
#include "x11/yagl_x11_platform.h"
#endif
#ifdef YAGL_PLATFORM_GBM
#include "gbm/yagl_gbm_platform.h"
#endif
#ifdef YAGL_PLATFORM_WAYLAND
#include "wayland/yagl_wayland_platform.h"
#endif
#ifdef YAGL_PLATFORM_TIZEN
#include "tizen/yagl_tizen_platform.h"
#endif
#include "yagl_log.h"
#include <stdlib.h>
#include <string.h>

static struct
{
   struct yagl_native_platform *platform;
   const char *name;
} g_platforms[] =
{
#ifdef YAGL_PLATFORM_TIZEN
	{&yagl_tizen_platform, "wayland"},
#endif
#ifdef YAGL_PLATFORM_WAYLAND
    {&yagl_wayland_platform, "wayland"},
#endif
#ifdef YAGL_PLATFORM_GBM
    {&yagl_gbm_platform, "gbm"},
#endif
#ifdef YAGL_PLATFORM_X11
    {&yagl_x11_platform, "x11"},
#endif
};

struct yagl_native_platform *yagl_guess_platform(yagl_os_display os_dpy)
{
    const char *platform_name = NULL;
    uint32_t i;

    YAGL_LOG_FUNC_SET(yagl_guess_platform);

    platform_name = getenv("EGL_PLATFORM");

    if (!platform_name || !platform_name[0]) {
        platform_name = getenv("EGL_DISPLAY");
    }

    if (platform_name && platform_name[0]) {
        for (i = 0; i < sizeof(g_platforms)/sizeof(g_platforms[0]); ++i) {
            if (strcmp(g_platforms[i].name, platform_name) == 0) {
                YAGL_LOG_INFO("EGL platform %s chosen by environment variable",
                              g_platforms[i].name);
                return g_platforms[i].platform;
            }
        }
    }

    for (i = 0; i < sizeof(g_platforms)/sizeof(g_platforms[0]); ++i) {
        if (g_platforms[i].platform->probe(os_dpy)) {
            YAGL_LOG_INFO("EGL platform %s chosen by probing",
                          g_platforms[i].name);
            return g_platforms[i].platform;
        }
    }

    YAGL_LOG_ERROR("No EGL platform chosen");

    return NULL;
}