/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997-2006 Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Lesser General Public

    License as published by the Free Software Foundation; either

    version 2.1 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

    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser 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

    Sam Lantinga

    slouken@libsdl.org

*/

#include "SDL_config.h"

/* This file contains functions for backwards compatibility with SDL 1.2 */

#include "SDL.h"

#include "video/SDL_sysvideo.h"

static SDL_WindowID window;

static char *wm_title;

char *

SDL_AudioDriverName(char *namebuf, int maxlen)

{

    const char *name = SDL_GetCurrentAudioDriver();

    if (name) {

        SDL_strlcpy(namebuf, name, maxlen);

        return namebuf;

    }

    return NULL;

}

char *

SDL_VideoDriverName(char *namebuf, int maxlen)

{

    const char *name = SDL_GetCurrentVideoDriver();

    if (name) {

        SDL_strlcpy(namebuf, name, maxlen);

        return namebuf;

    }

    return NULL;

}

int

SDL_VideoModeOK(int width, int height, int bpp, Uint32 flags)

{

    int i, actual_bpp = 0;

    if (!SDL_GetVideoDevice()) {

        return 0;

    }

    if (!(flags & SDL_FULLSCREEN)) {

        return SDL_BITSPERPIXEL(SDL_GetDesktopDisplayMode()->format);

    }

    for (i = 0; i < SDL_GetNumDisplayModes(); ++i) {

        const SDL_DisplayMode *mode = SDL_GetDisplayMode(i);

        if (!mode->w || !mode->h || (width == mode->w && height == mode->h)) {

            if (!mode->format) {

                return bpp;

            }

            if (SDL_BITSPERPIXEL(mode->format) >= bpp) {

                actual_bpp = SDL_BITSPERPIXEL(mode->format);

            }

        }

    }

    return actual_bpp;

}

SDL_Rect **

SDL_ListModes(SDL_PixelFormat * format, Uint32 flags)

{

    int i, nmodes;

    SDL_Rect **modes;

    if (!SDL_GetVideoDevice()) {

        return NULL;

    }

    if (!(flags & SDL_FULLSCREEN)) {

        return (SDL_Rect **) (-1);

    }

    /* Memory leak, but this is a compatibility function, who cares? */

    nmodes = 0;

    for (i = 0; i < SDL_GetNumDisplayModes(); ++i) {

        const SDL_DisplayMode *mode = SDL_GetDisplayMode(i);

        if (!mode->w || !mode->h) {

            return (SDL_Rect **) (-1);

        }

        if (SDL_BITSPERPIXEL(mode->format) != format->BitsPerPixel) {

            continue;

        }

        if (nmodes > 0 && modes[nmodes - 1]->w == mode->w

            && modes[nmodes - 1]->h == mode->h) {

            continue;

        }

        modes = SDL_realloc(modes, (nmodes + 2) * sizeof(*modes));

        if (!modes) {

            return NULL;

        }

        modes[nmodes] = (SDL_Rect *) SDL_malloc(sizeof(SDL_Rect));

        if (!modes[nmodes]) {

            return NULL;

        }

        modes[nmodes]->x = 0;

        modes[nmodes]->y = 0;

        modes[nmodes]->w = mode->w;

        modes[nmodes]->h = mode->h;

        ++nmodes;

    }

    if (modes) {

        modes[nmodes] = NULL;

    }

    return modes;

}

static int (*orig_eventfilter) (const SDL_Event * event);

static int

SDL_CompatEventFilter(const SDL_Event * event)

{

    SDL_Event fake;

    switch (event->type) {

    case SDL_WINDOWEVENT:

        switch (event->window.event) {

        case SDL_WINDOWEVENT_RESIZED:

            fake.type = SDL_VIDEORESIZE;

            fake.resize.w = event->window.data1;

            fake.resize.h = event->window.data2;

            SDL_PushEvent(&fake);

            break;

        case SDL_WINDOWEVENT_MINIMIZED:

            fake.type = SDL_ACTIVEEVENT;

            fake.active.gain = 0;

            fake.active.state = SDL_APPACTIVE;

            SDL_PushEvent(&fake);

            break;

        case SDL_WINDOWEVENT_RESTORED:

            fake.type = SDL_ACTIVEEVENT;

            fake.active.gain = 1;

            fake.active.state = SDL_APPACTIVE;

            SDL_PushEvent(&fake);

            break;

        case SDL_WINDOWEVENT_ENTER:

            fake.type = SDL_ACTIVEEVENT;

            fake.active.gain = 1;

            fake.active.state = SDL_APPMOUSEFOCUS;

            SDL_PushEvent(&fake);

            break;

        case SDL_WINDOWEVENT_LEAVE:

            fake.type = SDL_ACTIVEEVENT;

            fake.active.gain = 0;

            fake.active.state = SDL_APPMOUSEFOCUS;

            SDL_PushEvent(&fake);

            break;

        case SDL_WINDOWEVENT_FOCUS_GAINED:

            fake.type = SDL_ACTIVEEVENT;

            fake.active.gain = 1;

            fake.active.state = SDL_APPINPUTFOCUS;

            SDL_PushEvent(&fake);

            break;

        case SDL_WINDOWEVENT_FOCUS_LOST:

            fake.type = SDL_ACTIVEEVENT;

            fake.active.gain = 1;

            fake.active.state = SDL_APPINPUTFOCUS;

            SDL_PushEvent(&fake);

            break;

        }

    }

    return orig_eventfilter(event);

}

SDL_Surface *

SDL_SetVideoMode(int width, int height, int bpp, Uint32 flags)

{

    int (*filter) (const SDL_Event * event);

    const SDL_DisplayMode *desktop_mode;

    SDL_DisplayMode mode;

    int i;

    Uint32 window_flags;

    Uint32 desktop_format;

    Uint32 desired_format;

    if (!SDL_GetVideoDevice()) {

        if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE) < 0) {

            return NULL;

        }

    }

    /* Destroy existing window */

    SDL_DestroyWindow(window);

    /* Set up the event filter */

    filter = SDL_GetEventFilter();

    if (filter != SDL_CompatEventFilter) {

        orig_eventfilter = filter;

    }

    SDL_SetEventFilter(SDL_CompatEventFilter);

    /* Create a new window */

    window_flags = SDL_WINDOW_SHOWN;

    if (flags & SDL_FULLSCREEN) {

        window_flags |= SDL_WINDOW_FULLSCREEN;

    }

    if (flags & SDL_OPENGL) {

        window_flags |= SDL_WINDOW_OPENGL;

    }

    if (flags & SDL_RESIZABLE) {

        window_flags |= SDL_WINDOW_RESIZABLE;

    }

    if (flags & SDL_NOFRAME) {

        window_flags |= SDL_WINDOW_BORDERLESS;

    }

    window = SDL_CreateWindow(wm_title, 0, 0, width, height, window_flags);

    if (!window) {

        return NULL;

    }

    /* Set up the desired display mode */

    desktop_mode = SDL_GetDesktopDisplayMode();

    desktop_format = desktop_mode->format;

    if (desktop_format && ((flags & SDL_ANYFORMAT)

                           || (bpp == SDL_BITSPERPIXEL(desktop_format)))) {

        desired_format = desktop_format;

    } else {

        switch (bpp) {

        case 0:

            if (desktop_format) {

                desired_format = desktop_format;

            } else {

                desired_format = SDL_PixelFormat_RGB888;

            }

            break;

        case 8:

            desired_format = SDL_PixelFormat_Index8;

            break;

        case 15:

            desired_format = SDL_PixelFormat_RGB555;

            break;

        case 16:

            desired_format = SDL_PixelFormat_RGB565;

            break;

        case 24:

            desired_format = SDL_PixelFormat_RGB24;

            break;

        case 32:

            desired_format = SDL_PixelFormat_RGB888;

            break;

        default:

            SDL_SetError("Unsupported bpp in SDL_SetVideoMode()");

            return NULL;

        }

    }

    mode.format = desired_format;

    mode.w = width;

    mode.h = height;

    mode.refresh_rate = 0;

    /* Set the desired display mode */

    if (flags & SDL_FULLSCREEN) {

        if (!SDL_GetClosestDisplayMode(&mode, &mode)) {

            return NULL;

        }

    } else {

        if (desktop_format) {

            mode.format = desktop_format;

        }

        if (desktop_mode->w && desktop_mode->h) {

            mode.w = desktop_mode->w;

            mode.h = desktop_mode->h;

        }

        mode.refresh_rate = desktop_mode->refresh_rate;

    }

    if (SDL_SetDisplayMode(&mode) < 0) {

        return NULL;

    }

    /* Create the display surface */

    return SDL_CreateWindowSurface(window, desired_format, flags);

}

SDL_Surface *

SDL_GetVideoSurface(void)

{

    SDL_VideoDevice *_this = SDL_GetVideoDevice();

    return SDL_VideoSurface;

}