[libpicofe.git] / plat_sdl.c

/*
 * (C) Gražvydas "notaz" Ignotas, 2012
 *
 * This work is licensed under the terms of any of these licenses
 * (at your option):
 *  - GNU GPL, version 2 or later.
 *  - GNU LGPL, version 2.1 or later.
 *  - MAME license.
 * See the COPYING file in the top-level directory.
 */

#include <stdio.h>
#include <stdint.h>
#include <SDL.h>
#include <SDL_syswm.h>

#include "menu.h"
#include "plat.h"
#include "gl.h"
#include "plat_sdl.h"

// XXX: maybe determine this instead..
#define WM_DECORATION_H 32

SDL_Surface *plat_sdl_screen;
SDL_Overlay *plat_sdl_overlay;
int plat_sdl_gl_active;
void (*plat_sdl_resize_cb)(int w, int h);
void (*plat_sdl_quit_cb)(void);
int plat_sdl_no_overlay2x;

static char vid_drv_name[32];
static int window_w, window_h, window_b;
static int fs_w, fs_h;
static int old_fullscreen;
static int vout_mode_overlay = -1, vout_mode_overlay2x = -1, vout_mode_gl = -1;
static void *display, *window;
static int gl_quirks;
static Uint32 screen_flags =
#if defined(SDL_SURFACE_SW)
  SDL_SWSURFACE;
#elif defined(SDL_TRIPLEBUF) && defined(SDL_BUFFER_3X)
  SDL_HWSURFACE | SDL_TRIPLEBUF;
#else
  SDL_HWSURFACE | SDL_DOUBLEBUF;
#endif

static Uint32 get_screen_flags(void)
{
  Uint32 flags = screen_flags;
  flags &= ~(SDL_FULLSCREEN | SDL_RESIZABLE);
  if (plat_target.vout_fullscreen && fs_w && fs_h)
    flags |= SDL_FULLSCREEN;
  else if (window_b)
    flags |= SDL_RESIZABLE;
  return flags;
}

static void update_wm_display_window(void)
{
  // get x11 display/window for GL
#ifdef SDL_VIDEO_DRIVER_X11
  SDL_SysWMinfo wminfo;
  int ret;
  if (strcmp(vid_drv_name, "x11") == 0) {
    SDL_VERSION(&wminfo.version);
    ret = SDL_GetWMInfo(&wminfo);
    if (ret > 0) {
      display = wminfo.info.x11.display;
      window = (void *)wminfo.info.x11.window;
    }
  }
#endif
}

/* w, h is layer resolution */
int plat_sdl_change_video_mode(int w, int h, int force)
{
  static int prev_w, prev_h;

  // skip GL recreation if window doesn't change - avoids flicker
  if (plat_target.vout_method == vout_mode_gl && plat_sdl_gl_active
      && plat_target.vout_fullscreen == old_fullscreen
      && w == prev_w && h == prev_h && !force)
  {
    return 0;
  }

  if (w == 0)
    w = prev_w;
  else
    prev_w = w;
  if (h == 0)
    h = prev_h;
  else
    prev_h = h;

  // invalid method might come from config..
  if (plat_target.vout_method != 0
      && plat_target.vout_method != vout_mode_overlay
      && plat_target.vout_method != vout_mode_overlay2x
      && plat_target.vout_method != vout_mode_gl)
  {
    fprintf(stderr, "invalid vout_method: %d\n", plat_target.vout_method);
    plat_target.vout_method = 0;
  }

  if (plat_sdl_overlay != NULL) {
    SDL_FreeYUVOverlay(plat_sdl_overlay);
    plat_sdl_overlay = NULL;
  }
  if (plat_sdl_gl_active) {
    gl_destroy();
    plat_sdl_gl_active = 0;
  }

  if (plat_target.vout_method == 0 || (force && (window_w != w || window_h != h
      || plat_target.vout_fullscreen != old_fullscreen
      || !plat_sdl_screen->format || plat_sdl_screen->format->BitsPerPixel != 16))) {
    Uint32 flags = get_screen_flags();
    int win_w = w;
    int win_h = h;

    if (plat_target.vout_fullscreen && fs_w && fs_h) {
      win_w = fs_w;
      win_h = fs_h;
    }

    // XXX: workaround some occasional mysterious deadlock in SDL_SetVideoMode
    SDL_PumpEvents();

    if (!plat_sdl_screen || screen_flags != flags ||
        plat_sdl_screen->w != win_w || plat_sdl_screen->h != win_h ||
        (!plat_sdl_screen->format || plat_sdl_screen->format->BitsPerPixel != 16))
      plat_sdl_screen = SDL_SetVideoMode(win_w, win_h, 16, flags);
    if (plat_sdl_screen == NULL) {
      fprintf(stderr, "SDL_SetVideoMode failed: %s\n", SDL_GetError());
      return -1;
    }
    if (vout_mode_gl != -1)
      update_wm_display_window();
    screen_flags = flags;
    window_w = win_w;
    window_h = win_h;
  }

  if (plat_target.vout_method == vout_mode_overlay
      || plat_target.vout_method == vout_mode_overlay2x) {
    int W = plat_target.vout_method == vout_mode_overlay2x && !plat_sdl_no_overlay2x ? 2*w : w;
    plat_sdl_overlay = SDL_CreateYUVOverlay(W, h, SDL_UYVY_OVERLAY, plat_sdl_screen);
    if (plat_sdl_overlay != NULL && SDL_LockYUVOverlay(plat_sdl_overlay) == 0) {
      if ((uintptr_t)plat_sdl_overlay->pixels[0] & 3)
        fprintf(stderr, "warning: overlay pointer is unaligned\n");

      plat_sdl_overlay_clear();

      SDL_UnlockYUVOverlay(plat_sdl_overlay);
    }
    else {
      fprintf(stderr, "warning: could not create overlay.\n");
      plat_target.vout_method = 0;
    }
  }
  else if (plat_target.vout_method == vout_mode_gl) {
    int sw = plat_sdl_screen->w, sh = plat_sdl_screen->h;
    plat_sdl_gl_active = (gl_create(window, &gl_quirks, sw, sh) == 0);
    if (!plat_sdl_gl_active) {
      fprintf(stderr, "warning: could not init GL.\n");
      plat_target.vout_method = 0;
    }
  }

  old_fullscreen = plat_target.vout_fullscreen;
  if (plat_sdl_resize_cb != NULL)
    plat_sdl_resize_cb(plat_sdl_screen->w, plat_sdl_screen->h);

  return 0;
}

void plat_sdl_event_handler(void *event_)
{
  static int was_active;
  SDL_Event *event = event_;

  switch (event->type) {
  case SDL_VIDEORESIZE:
    //printf("resize %dx%d\n", event->resize.w, event->resize.h);
    if ((plat_target.vout_method != 0 || window_b) && !plat_target.vout_fullscreen)
    {
      int win_w = event->resize.w & ~3;
      int win_h = event->resize.h & ~3;
      plat_sdl_change_video_mode(win_w, win_h, 1);
    }
    break;
  case SDL_ACTIVEEVENT:
    if (event->active.gain && !was_active) {
      if (plat_sdl_overlay != NULL) {
        SDL_Rect dstrect = { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
        SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
      }
      else if (plat_sdl_gl_active) {
        if (gl_quirks & GL_QUIRK_ACTIVATE_RECREATE) {
          int sw = plat_sdl_screen->w, sh = plat_sdl_screen->h;
          gl_destroy();
          plat_sdl_gl_active = (gl_create(window, &gl_quirks, sw, sh) == 0);
        }
        gl_flip(NULL, 0, 0);
      }
      // else SDL takes care of it
    }
    was_active = event->active.gain;
    break;
  case SDL_QUIT:
    if (plat_sdl_quit_cb != NULL)
      plat_sdl_quit_cb();
    break;
  }
}

int plat_sdl_init(void)
{
  static const char *vout_list[] = { NULL, NULL, NULL, NULL, NULL };
  const SDL_VideoInfo *info;
  const char *env;
  int overlay_works = 0;
  int gl_works = 0;
  int i, ret, h;
  Uint32 flags;
  int try_gl;

  ret = SDL_Init(SDL_INIT_VIDEO | SDL_INIT_NOPARACHUTE);
  if (ret != 0) {
    fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
    return -1;
  }

  info = SDL_GetVideoInfo();
  if (info != NULL) {
    fs_w = info->current_w;
    fs_h = info->current_h;
    if (info->wm_available)
      window_b = WM_DECORATION_H;
    printf("plat_sdl: using %dx%d as fullscreen resolution\n", fs_w, fs_h);
  }

  g_menuscreen_w = 640;
  if (fs_w != 0 && g_menuscreen_w > fs_w)
    g_menuscreen_w = fs_w;
  g_menuscreen_h = 480;
  if (fs_h != 0) {
    h = fs_h;
    if (window_b && h > window_b)
      h -= window_b;
    if (g_menuscreen_h > h)
      g_menuscreen_h = h;
  }

  plat_sdl_screen = SDL_SetVideoMode(g_menuscreen_w, g_menuscreen_h, 0,
      (flags = get_screen_flags()));
  if (plat_sdl_screen == NULL) {
    fprintf(stderr, "SDL_SetVideoMode failed: %s\n", SDL_GetError());
    plat_sdl_screen = SDL_SetVideoMode(0, 0, 0, (flags = get_screen_flags()));
    if (plat_sdl_screen == NULL) {
      fprintf(stderr, "attempting SDL_SWSURFACE fallback\n");
      screen_flags = SDL_SWSURFACE;
      plat_sdl_screen = SDL_SetVideoMode(0, 0, 0, (flags = get_screen_flags()));
      if (plat_sdl_screen == NULL) {
        fprintf(stderr, "SDL_SetVideoMode failed: %s\n", SDL_GetError());
        goto fail;
      }
    }

    if (plat_sdl_screen->w < 320 || plat_sdl_screen->h < 240) {
      fprintf(stderr, "resolution %dx%d is too small, sorry.\n",
              plat_sdl_screen->w, plat_sdl_screen->h);
      goto fail;
    }
  }
  g_menuscreen_w = plat_sdl_screen->w;
  g_menuscreen_h = plat_sdl_screen->h;
  g_menuscreen_pp = g_menuscreen_w;
  screen_flags = flags;
  window_w = plat_sdl_screen->w;
  window_h = plat_sdl_screen->h;

  plat_sdl_overlay = SDL_CreateYUVOverlay(plat_sdl_screen->w, plat_sdl_screen->h,
    SDL_UYVY_OVERLAY, plat_sdl_screen);
  if (plat_sdl_overlay != NULL) {
    printf("plat_sdl: overlay: fmt %x, planes: %d, pitch: %d, hw: %d\n",
      plat_sdl_overlay->format, plat_sdl_overlay->planes, *plat_sdl_overlay->pitches,
      plat_sdl_overlay->hw_overlay);

    // some platforms require "native" bpp for this to work
    if (plat_sdl_overlay->hw_overlay)
      overlay_works = 1;
    else
      fprintf(stderr, "warning: video overlay is not hardware accelerated, "
                      "not going to use it.\n");
    SDL_FreeYUVOverlay(plat_sdl_overlay);
    plat_sdl_overlay = NULL;
  }
  else
    fprintf(stderr, "overlay is not available.\n");

  SDL_VideoDriverName(vid_drv_name, sizeof(vid_drv_name));
  ret = -1;
  try_gl = 1;
  env = getenv("DISPLAY");
  if (env && env[0] != ':') {
    fprintf(stderr, "looks like a remote DISPLAY, "
      "not trying GL (use PICOFE_GL=1 to override)\n");
    // because some drivers just kill the program with no way to recover
    try_gl = 0;
  }
  env = getenv("PICOFE_GL");
  if (env)
    try_gl = atoi(env);
  if (try_gl) {
    ret = gl_init(display, &gl_quirks);
    if (ret == 0) {
      update_wm_display_window();
      ret = gl_create(window, &gl_quirks, g_menuscreen_w, g_menuscreen_h);
    }
  }
  if (ret == 0) {
    gl_announce();
    gl_works = 1;
    gl_destroy();
  }

  i = 0;
  vout_list[i++] = "SDL Window";
  if (overlay_works) {
    plat_target.vout_method = vout_mode_overlay = i;
    vout_list[i++] = "Video Overlay";
#ifdef SDL_OVERLAY_2X
    plat_target.vout_method = vout_mode_overlay2x = i;
    vout_list[i++] = "Video Overlay 2x";
#endif
  }
  if (gl_works) {
    plat_target.vout_method = vout_mode_gl = i;
    vout_list[i++] = "OpenGL";
  }
  plat_target.vout_methods = vout_list;

  plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 1);
  return 0;

fail:
  SDL_Quit();
  return -1;
}

void plat_sdl_finish(void)
{
  if (plat_sdl_overlay != NULL) {
    SDL_FreeYUVOverlay(plat_sdl_overlay);
    plat_sdl_overlay = NULL;
  }
  if (plat_sdl_gl_active) {
    gl_destroy();
    plat_sdl_gl_active = 0;
  }
  gl_shutdown();

  // restore back to initial resolution
  // resolves black screen issue on R-Pi
  if (strcmp(vid_drv_name, "x11") != 0)
    SDL_SetVideoMode(fs_w, fs_h, 16, SDL_SWSURFACE);
  SDL_Quit();
}

void plat_sdl_overlay_clear(void)
{
  int pixels = plat_sdl_overlay->pitches[0]/2 * plat_sdl_overlay->h;
  int *dst = (int *)plat_sdl_overlay->pixels[0];
  int v = 0x10801080;

  for (; pixels > 7; dst += 4, pixels -= 2 * 4)
    dst[0] = dst[1] = dst[2] = dst[3] = v;

  for (; pixels > 1; dst++, pixels -= 2)
    *dst = v;
}

int plat_sdl_is_windowed(void)
{
  return window_b != 0;
}

int plat_sdl_is_fullscreen(void)
{
  // consider window title bar and screen menu here
  return window_w >= fs_w && window_h >= fs_h - 2*window_b;
}

void plat_sdl_gl_scaling(int type)
{
  gl_quirks &= ~GL_QUIRK_SCALING_NEAREST;
  if (type == 0)
    gl_quirks |= GL_QUIRK_SCALING_NEAREST;
}

void plat_sdl_gl_vsync(int on)
{
  gl_quirks &= ~GL_QUIRK_VSYNC_ON;
  if (on)
    gl_quirks |= GL_QUIRK_VSYNC_ON;
}

// vim:shiftwidth=2:expandtab
Commit	Line	Data
	1	/*
	2	* (C) Gražvydas "notaz" Ignotas, 2012
	3	*
	4	* This work is licensed under the terms of any of these licenses
	5	* (at your option):
	6	* - GNU GPL, version 2 or later.
	7	* - GNU LGPL, version 2.1 or later.
	8	* - MAME license.
	9	* See the COPYING file in the top-level directory.
	10	*/
	11
	12	#include <stdio.h>
	13	#include <stdint.h>
	14	#include <SDL.h>
	15	#include <SDL_syswm.h>
	16
	17	#include "menu.h"
	18	#include "plat.h"
	19	#include "gl.h"
	20	#include "plat_sdl.h"
	21
	22	// XXX: maybe determine this instead..
	23	#define WM_DECORATION_H 32
	24
	25	SDL_Surface *plat_sdl_screen;
	26	SDL_Overlay *plat_sdl_overlay;
	27	int plat_sdl_gl_active;
	28	void (*plat_sdl_resize_cb)(int w, int h);
	29	void (*plat_sdl_quit_cb)(void);
	30	int plat_sdl_no_overlay2x;
	31
	32	static char vid_drv_name[32];
	33	static int window_w, window_h, window_b;
	34	static int fs_w, fs_h;
	35	static int old_fullscreen;
	36	static int vout_mode_overlay = -1, vout_mode_overlay2x = -1, vout_mode_gl = -1;
	37	static void display, window;
	38	static int gl_quirks;
	39	static Uint32 screen_flags =
	40	#if defined(SDL_SURFACE_SW)
	41	SDL_SWSURFACE;
	42	#elif defined(SDL_TRIPLEBUF) && defined(SDL_BUFFER_3X)
	43	SDL_HWSURFACE \| SDL_TRIPLEBUF;
	44	#else
	45	SDL_HWSURFACE \| SDL_DOUBLEBUF;
	46	#endif
	47
	48	static Uint32 get_screen_flags(void)
	49	{
	50	Uint32 flags = screen_flags;
	51	flags &= ~(SDL_FULLSCREEN \| SDL_RESIZABLE);
	52	if (plat_target.vout_fullscreen && fs_w && fs_h)
	53	flags \|= SDL_FULLSCREEN;
	54	else if (window_b)
	55	flags \|= SDL_RESIZABLE;
	56	return flags;
	57	}
	58
	59	static void update_wm_display_window(void)
	60	{
	61	// get x11 display/window for GL
	62	#ifdef SDL_VIDEO_DRIVER_X11
	63	SDL_SysWMinfo wminfo;
	64	int ret;
	65	if (strcmp(vid_drv_name, "x11") == 0) {
	66	SDL_VERSION(&wminfo.version);
	67	ret = SDL_GetWMInfo(&wminfo);
	68	if (ret > 0) {
	69	display = wminfo.info.x11.display;
	70	window = (void *)wminfo.info.x11.window;
	71	}
	72	}
	73	#endif
	74	}
	75
	76	/* w, h is layer resolution */
	77	int plat_sdl_change_video_mode(int w, int h, int force)
	78	{
	79	static int prev_w, prev_h;
	80
	81	// skip GL recreation if window doesn't change - avoids flicker
	82	if (plat_target.vout_method == vout_mode_gl && plat_sdl_gl_active
	83	&& plat_target.vout_fullscreen == old_fullscreen
	84	&& w == prev_w && h == prev_h && !force)
	85	{
	86	return 0;
	87	}
	88
	89	if (w == 0)
	90	w = prev_w;
	91	else
	92	prev_w = w;
	93	if (h == 0)
	94	h = prev_h;
	95	else
	96	prev_h = h;
	97
	98	// invalid method might come from config..
	99	if (plat_target.vout_method != 0
	100	&& plat_target.vout_method != vout_mode_overlay
	101	&& plat_target.vout_method != vout_mode_overlay2x
	102	&& plat_target.vout_method != vout_mode_gl)
	103	{
	104	fprintf(stderr, "invalid vout_method: %d\n", plat_target.vout_method);
	105	plat_target.vout_method = 0;
	106	}
	107
	108	if (plat_sdl_overlay != NULL) {
	109	SDL_FreeYUVOverlay(plat_sdl_overlay);
	110	plat_sdl_overlay = NULL;
	111	}
	112	if (plat_sdl_gl_active) {
	113	gl_destroy();
	114	plat_sdl_gl_active = 0;
	115	}
	116
	117	if (plat_target.vout_method == 0 \|\| (force && (window_w != w \|\| window_h != h
	118	\|\| plat_target.vout_fullscreen != old_fullscreen
	119	\|\| !plat_sdl_screen->format \|\| plat_sdl_screen->format->BitsPerPixel != 16))) {
	120	Uint32 flags = get_screen_flags();
	121	int win_w = w;
	122	int win_h = h;
	123
	124	if (plat_target.vout_fullscreen && fs_w && fs_h) {
	125	win_w = fs_w;
	126	win_h = fs_h;
	127	}
	128
	129	// XXX: workaround some occasional mysterious deadlock in SDL_SetVideoMode
	130	SDL_PumpEvents();
	131
	132	if (!plat_sdl_screen \|\| screen_flags != flags \|\|
	133	plat_sdl_screen->w != win_w \|\| plat_sdl_screen->h != win_h \|\|
	134	(!plat_sdl_screen->format \|\| plat_sdl_screen->format->BitsPerPixel != 16))
	135	plat_sdl_screen = SDL_SetVideoMode(win_w, win_h, 16, flags);
	136	if (plat_sdl_screen == NULL) {
	137	fprintf(stderr, "SDL_SetVideoMode failed: %s\n", SDL_GetError());
	138	return -1;
	139	}
	140	if (vout_mode_gl != -1)
	141	update_wm_display_window();
	142	screen_flags = flags;
	143	window_w = win_w;
	144	window_h = win_h;
	145	}
	146
	147	if (plat_target.vout_method == vout_mode_overlay
	148	\|\| plat_target.vout_method == vout_mode_overlay2x) {
	149	int W = plat_target.vout_method == vout_mode_overlay2x && !plat_sdl_no_overlay2x ? 2*w : w;
	150	plat_sdl_overlay = SDL_CreateYUVOverlay(W, h, SDL_UYVY_OVERLAY, plat_sdl_screen);
	151	if (plat_sdl_overlay != NULL && SDL_LockYUVOverlay(plat_sdl_overlay) == 0) {
	152	if ((uintptr_t)plat_sdl_overlay->pixels[0] & 3)
	153	fprintf(stderr, "warning: overlay pointer is unaligned\n");
	154
	155	plat_sdl_overlay_clear();
	156
	157	SDL_UnlockYUVOverlay(plat_sdl_overlay);
	158	}
	159	else {
	160	fprintf(stderr, "warning: could not create overlay.\n");
	161	plat_target.vout_method = 0;
	162	}
	163	}
	164	else if (plat_target.vout_method == vout_mode_gl) {
	165	int sw = plat_sdl_screen->w, sh = plat_sdl_screen->h;
	166	plat_sdl_gl_active = (gl_create(window, &gl_quirks, sw, sh) == 0);
	167	if (!plat_sdl_gl_active) {
	168	fprintf(stderr, "warning: could not init GL.\n");
	169	plat_target.vout_method = 0;
	170	}
	171	}
	172
	173	old_fullscreen = plat_target.vout_fullscreen;
	174	if (plat_sdl_resize_cb != NULL)
	175	plat_sdl_resize_cb(plat_sdl_screen->w, plat_sdl_screen->h);
	176
	177	return 0;
	178	}
	179
	180	void plat_sdl_event_handler(void *event_)
	181	{
	182	static int was_active;
	183	SDL_Event *event = event_;
	184
	185	switch (event->type) {
	186	case SDL_VIDEORESIZE:
	187	//printf("resize %dx%d\n", event->resize.w, event->resize.h);
	188	if ((plat_target.vout_method != 0 \|\| window_b) && !plat_target.vout_fullscreen)
	189	{
	190	int win_w = event->resize.w & ~3;
	191	int win_h = event->resize.h & ~3;
	192	plat_sdl_change_video_mode(win_w, win_h, 1);
	193	}
	194	break;
	195	case SDL_ACTIVEEVENT:
	196	if (event->active.gain && !was_active) {
	197	if (plat_sdl_overlay != NULL) {
	198	SDL_Rect dstrect = { 0, 0, plat_sdl_screen->w, plat_sdl_screen->h };
	199	SDL_DisplayYUVOverlay(plat_sdl_overlay, &dstrect);
	200	}
	201	else if (plat_sdl_gl_active) {
	202	if (gl_quirks & GL_QUIRK_ACTIVATE_RECREATE) {
	203	int sw = plat_sdl_screen->w, sh = plat_sdl_screen->h;
	204	gl_destroy();
	205	plat_sdl_gl_active = (gl_create(window, &gl_quirks, sw, sh) == 0);
	206	}
	207	gl_flip(NULL, 0, 0);
	208	}
	209	// else SDL takes care of it
	210	}
	211	was_active = event->active.gain;
	212	break;
	213	case SDL_QUIT:
	214	if (plat_sdl_quit_cb != NULL)
	215	plat_sdl_quit_cb();
	216	break;
	217	}
	218	}
	219
	220	int plat_sdl_init(void)
	221	{
	222	static const char *vout_list[] = { NULL, NULL, NULL, NULL, NULL };
	223	const SDL_VideoInfo *info;
	224	const char *env;
	225	int overlay_works = 0;
	226	int gl_works = 0;
	227	int i, ret, h;
	228	Uint32 flags;
	229	int try_gl;
	230
	231	ret = SDL_Init(SDL_INIT_VIDEO \| SDL_INIT_NOPARACHUTE);
	232	if (ret != 0) {
	233	fprintf(stderr, "SDL_Init failed: %s\n", SDL_GetError());
	234	return -1;
	235	}
	236
	237	info = SDL_GetVideoInfo();
	238	if (info != NULL) {
	239	fs_w = info->current_w;
	240	fs_h = info->current_h;
	241	if (info->wm_available)
	242	window_b = WM_DECORATION_H;
	243	printf("plat_sdl: using %dx%d as fullscreen resolution\n", fs_w, fs_h);
	244	}
	245
	246	g_menuscreen_w = 640;
	247	if (fs_w != 0 && g_menuscreen_w > fs_w)
	248	g_menuscreen_w = fs_w;
	249	g_menuscreen_h = 480;
	250	if (fs_h != 0) {
	251	h = fs_h;
	252	if (window_b && h > window_b)
	253	h -= window_b;
	254	if (g_menuscreen_h > h)
	255	g_menuscreen_h = h;
	256	}
	257
	258	plat_sdl_screen = SDL_SetVideoMode(g_menuscreen_w, g_menuscreen_h, 0,
	259	(flags = get_screen_flags()));
	260	if (plat_sdl_screen == NULL) {
	261	fprintf(stderr, "SDL_SetVideoMode failed: %s\n", SDL_GetError());
	262	plat_sdl_screen = SDL_SetVideoMode(0, 0, 0, (flags = get_screen_flags()));
	263	if (plat_sdl_screen == NULL) {
	264	fprintf(stderr, "attempting SDL_SWSURFACE fallback\n");
	265	screen_flags = SDL_SWSURFACE;
	266	plat_sdl_screen = SDL_SetVideoMode(0, 0, 0, (flags = get_screen_flags()));
	267	if (plat_sdl_screen == NULL) {
	268	fprintf(stderr, "SDL_SetVideoMode failed: %s\n", SDL_GetError());
	269	goto fail;
	270	}
	271	}
	272
	273	if (plat_sdl_screen->w < 320 \|\| plat_sdl_screen->h < 240) {
	274	fprintf(stderr, "resolution %dx%d is too small, sorry.\n",
	275	plat_sdl_screen->w, plat_sdl_screen->h);
	276	goto fail;
	277	}
	278	}
	279	g_menuscreen_w = plat_sdl_screen->w;
	280	g_menuscreen_h = plat_sdl_screen->h;
	281	g_menuscreen_pp = g_menuscreen_w;
	282	screen_flags = flags;
	283	window_w = plat_sdl_screen->w;
	284	window_h = plat_sdl_screen->h;
	285
	286	plat_sdl_overlay = SDL_CreateYUVOverlay(plat_sdl_screen->w, plat_sdl_screen->h,
	287	SDL_UYVY_OVERLAY, plat_sdl_screen);
	288	if (plat_sdl_overlay != NULL) {
	289	printf("plat_sdl: overlay: fmt %x, planes: %d, pitch: %d, hw: %d\n",
	290	plat_sdl_overlay->format, plat_sdl_overlay->planes, *plat_sdl_overlay->pitches,
	291	plat_sdl_overlay->hw_overlay);
	292
	293	// some platforms require "native" bpp for this to work
	294	if (plat_sdl_overlay->hw_overlay)
	295	overlay_works = 1;
	296	else
	297	fprintf(stderr, "warning: video overlay is not hardware accelerated, "
	298	"not going to use it.\n");
	299	SDL_FreeYUVOverlay(plat_sdl_overlay);
	300	plat_sdl_overlay = NULL;
	301	}
	302	else
	303	fprintf(stderr, "overlay is not available.\n");
	304
	305	SDL_VideoDriverName(vid_drv_name, sizeof(vid_drv_name));
	306	ret = -1;
	307	try_gl = 1;
	308	env = getenv("DISPLAY");
	309	if (env && env[0] != ':') {
	310	fprintf(stderr, "looks like a remote DISPLAY, "
	311	"not trying GL (use PICOFE_GL=1 to override)\n");
	312	// because some drivers just kill the program with no way to recover
	313	try_gl = 0;
	314	}
	315	env = getenv("PICOFE_GL");
	316	if (env)
	317	try_gl = atoi(env);
	318	if (try_gl) {
	319	ret = gl_init(display, &gl_quirks);
	320	if (ret == 0) {
	321	update_wm_display_window();
	322	ret = gl_create(window, &gl_quirks, g_menuscreen_w, g_menuscreen_h);
	323	}
	324	}
	325	if (ret == 0) {
	326	gl_announce();
	327	gl_works = 1;
	328	gl_destroy();
	329	}
	330
	331	i = 0;
	332	vout_list[i++] = "SDL Window";
	333	if (overlay_works) {
	334	plat_target.vout_method = vout_mode_overlay = i;
	335	vout_list[i++] = "Video Overlay";
	336	#ifdef SDL_OVERLAY_2X
	337	plat_target.vout_method = vout_mode_overlay2x = i;
	338	vout_list[i++] = "Video Overlay 2x";
	339	#endif
	340	}
	341	if (gl_works) {
	342	plat_target.vout_method = vout_mode_gl = i;
	343	vout_list[i++] = "OpenGL";
	344	}
	345	plat_target.vout_methods = vout_list;
	346
	347	plat_sdl_change_video_mode(g_menuscreen_w, g_menuscreen_h, 1);
	348	return 0;
	349
	350	fail:
	351	SDL_Quit();
	352	return -1;
	353	}
	354
	355	void plat_sdl_finish(void)
	356	{
	357	if (plat_sdl_overlay != NULL) {
	358	SDL_FreeYUVOverlay(plat_sdl_overlay);
	359	plat_sdl_overlay = NULL;
	360	}
	361	if (plat_sdl_gl_active) {
	362	gl_destroy();
	363	plat_sdl_gl_active = 0;
	364	}
	365	gl_shutdown();
	366
	367	// restore back to initial resolution
	368	// resolves black screen issue on R-Pi
	369	if (strcmp(vid_drv_name, "x11") != 0)
	370	SDL_SetVideoMode(fs_w, fs_h, 16, SDL_SWSURFACE);
	371	SDL_Quit();
	372	}
	373
	374	void plat_sdl_overlay_clear(void)
	375	{
	376	int pixels = plat_sdl_overlay->pitches[0]/2 * plat_sdl_overlay->h;
	377	int dst = (int )plat_sdl_overlay->pixels[0];
	378	int v = 0x10801080;
	379
	380	for (; pixels > 7; dst += 4, pixels -= 2 * 4)
	381	dst[0] = dst[1] = dst[2] = dst[3] = v;
	382
	383	for (; pixels > 1; dst++, pixels -= 2)
	384	*dst = v;
	385	}
	386
	387	int plat_sdl_is_windowed(void)
	388	{
	389	return window_b != 0;
	390	}
	391
	392	int plat_sdl_is_fullscreen(void)
	393	{
	394	// consider window title bar and screen menu here
	395	return window_w >= fs_w && window_h >= fs_h - 2*window_b;
	396	}
	397
	398	void plat_sdl_gl_scaling(int type)
	399	{
	400	gl_quirks &= ~GL_QUIRK_SCALING_NEAREST;
	401	if (type == 0)
	402	gl_quirks \|= GL_QUIRK_SCALING_NEAREST;
	403	}
	404
	405	void plat_sdl_gl_vsync(int on)
	406	{
	407	gl_quirks &= ~GL_QUIRK_VSYNC_ON;
	408	if (on)
	409	gl_quirks \|= GL_QUIRK_VSYNC_ON;
	410	}
	411
	412	// vim:shiftwidth=2:expandtab