path: root/libvo/sub.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "config.h"
#ifdef HAVE_MALLOC_H
#include <malloc.h>
#endif

#include "mp_msg.h"
#include "video_out.h"
#include "font_load.h"
#include "sub.h"
#include "../spudec.h"

char * __sub_osd_names[]={
    "Seekbar",
    "Play",
    "Pause",
    "Stop",
    "Rewind",
    "Forward",
    "Clock",
    "Contrast",
    "Saturation",
    "Volume",
    "Brightness",
    "Hue"
};
char * __sub_osd_names_short[] ={ "", "|>", "||", "[]", "<<" , ">>", "", "", "", "", "", ""};

//static int vo_font_loaded=-1;
font_desc_t* vo_font=NULL;

unsigned char* vo_osd_text=NULL;
int sub_unicode=0;
int sub_utf8=0;
int sub_pos=100;
int sub_width_p=100;
int sub_alignment=0; /* 0=top, 1=center, 2=bottom */
int sub_visibility=1;
int sub_bg_color=0; /* subtitles background color */
int sub_bg_alpha=0;

// return the real height of a char:
static inline int get_height(int c,int h){
    int font;
    if ((font=vo_font->font[c])>=0)
	if(h<vo_font->pic_a[font]->h) h=vo_font->pic_a[font]->h;
    return h;
}

// renders char to a big per-object buffer where alpha and bitmap are separated
static void draw_alpha_buf(mp_osd_obj_t* obj, int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride)
{
    int dststride = obj->stride;
    int dstskip = obj->stride-w;
    int srcskip = stride-w;
    int i, j;
    unsigned char *b = obj->bitmap_buffer + (y0-obj->bbox.y1)*dststride + (x0-obj->bbox.x1);
    unsigned char *a = obj->alpha_buffer  + (y0-obj->bbox.y1)*dststride + (x0-obj->bbox.x1);
    unsigned char *bs = src;
    unsigned char *as = srca;

    if (x0 < obj->bbox.x1 || x0+w > obj->bbox.x2 || y0 < obj->bbox.y1 || y0+h > obj->bbox.y2) {
	fprintf(stderr, "osd text out of range: bbox [%d %d %d %d], txt [%d %d %d %d]\n",
		obj->bbox.x1, obj->bbox.x2, obj->bbox.y1, obj->bbox.y2,
		x0, x0+w, y0, y0+h);
	return;
    }
    
    for (i = 0; i < h; i++) {
	for (j = 0; j < w; j++, b++, a++, bs++, as++) {
	    if (*b < *bs) *b = *bs;
	    if (*as) {
		if (*a == 0 || *a > *as) *a = *as;
	    }
	}
	b+= dstskip;
	a+= dstskip;
	bs+= srcskip;
	as+= srcskip;
    }
}

// allocates/enlarges the alpha/bitmap buffer
static void alloc_buf(mp_osd_obj_t* obj)
{
    int len;
    if (obj->bbox.x2 < obj->bbox.x1) obj->bbox.x2 = obj->bbox.x1;
    if (obj->bbox.y2 < obj->bbox.y1) obj->bbox.y2 = obj->bbox.y1;
    obj->stride = ((obj->bbox.x2-obj->bbox.x1)+7)&(~7);
    len = obj->stride*(obj->bbox.y2-obj->bbox.y1);
    if (obj->allocated<len) {
	obj->allocated = len;
	free(obj->bitmap_buffer);
	free(obj->alpha_buffer);
	obj->bitmap_buffer = (unsigned char *)memalign(16, len);
	obj->alpha_buffer = (unsigned char *)memalign(16, len);
    }
    memset(obj->bitmap_buffer, sub_bg_color, len);
    memset(obj->alpha_buffer, sub_bg_alpha, len);
}

// renders the buffer
inline static void vo_draw_text_from_buffer(mp_osd_obj_t* obj,void (*draw_alpha)(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride)){
    if (obj->allocated > 0) {
	draw_alpha(obj->bbox.x1,obj->bbox.y1,
		   obj->bbox.x2-obj->bbox.x1,
		   obj->bbox.y2-obj->bbox.y1,
		   obj->bitmap_buffer,
		   obj->alpha_buffer,
		   obj->stride);
    }
}

inline static void vo_update_text_osd(mp_osd_obj_t* obj,int dxs,int dys){
	unsigned char *cp=vo_osd_text;
	int x=20;
	int h=0;
	int font;

        obj->bbox.x1=obj->x=x;
        obj->bbox.y1=obj->y=10;

        while (*cp){
          int c=*cp++;
	  render_one_glyph(vo_font, c);
	  x+=vo_font->width[c]+vo_font->charspace;
	  h=get_height(c,h);
        }
	
	obj->bbox.x2=x-vo_font->charspace;
	obj->bbox.y2=obj->bbox.y1+h;
	obj->flags|=OSDFLAG_BBOX;

	alloc_buf(obj);

	cp=vo_osd_text;
	x = obj->x;
        while (*cp){
          int c=*cp++;
          if ((font=vo_font->font[c])>=0)
            draw_alpha_buf(obj,x,obj->y,
			   vo_font->width[c],
			   vo_font->pic_a[font]->h,
			   vo_font->pic_b[font]->bmp+vo_font->start[c],
			   vo_font->pic_a[font]->bmp+vo_font->start[c],
			   vo_font->pic_a[font]->w);
          x+=vo_font->width[c]+vo_font->charspace;
        }
}

int vo_osd_progbar_type=-1;
int vo_osd_progbar_value=100;   // 0..256

// if we have n=256 bars then OSD progbar looks like below
// 
// 0   1    2    3 ... 256  <= vo_osd_progbar_value
// |   |    |    |       |
// [ ===  ===  === ... === ]
// 
//  the above schema is rescalled to n=elems bars

inline static void vo_update_text_progbar(mp_osd_obj_t* obj,int dxs,int dys){

    obj->flags|=OSDFLAG_CHANGED|OSDFLAG_VISIBLE;
    
    if(vo_osd_progbar_type<0 || !vo_font){
       obj->flags&=~OSDFLAG_VISIBLE;
       return;
    }
    
    render_one_glyph(vo_font, OSD_PB_START);
    render_one_glyph(vo_font, OSD_PB_END);
    render_one_glyph(vo_font, OSD_PB_0);
    render_one_glyph(vo_font, OSD_PB_1);
    render_one_glyph(vo_font, vo_osd_progbar_type);

    // calculate bbox corners:    
    {	int h=0;
        int y=(dys-vo_font->height)/2;
        int delimw=vo_font->width[OSD_PB_START]
     		  +vo_font->width[OSD_PB_END]
     		  +vo_font->charspace;
        int width=(2*dxs-3*delimw)/3;
   	int charw=vo_font->width[OSD_PB_0]+vo_font->charspace;
        int elems=width/charw;
   	int x=(dxs-elems*charw-delimw)/2;
	int delta = 0;
	h=get_height(OSD_PB_START,h);
	h=get_height(OSD_PB_END,h);
	h=get_height(OSD_PB_0,h);
	h=get_height(OSD_PB_1,h);
	if (vo_osd_progbar_type>0 && vo_font->font[vo_osd_progbar_type]>=0){
	    delta = vo_font->width[vo_osd_progbar_type]+vo_font->spacewidth;
	    delta = (x-delta > 0) ? delta : x;
	    h=get_height(vo_osd_progbar_type,h);
	}
	obj->bbox.x1=obj->x=x;
	obj->bbox.y1=obj->y=y;
	obj->bbox.x2=x+width+delimw;
	obj->bbox.y2=y+h; //vo_font->height;
	obj->flags|=OSDFLAG_BBOX;
	obj->params.progbar.elems=elems;
	obj->bbox.x1-=delta; // space for an icon
    }

    alloc_buf(obj);
    
    {
	int minw = vo_font->width[OSD_PB_START]+vo_font->width[OSD_PB_END]+vo_font->width[OSD_PB_0];
	if (vo_osd_progbar_type>0 && vo_font->font[vo_osd_progbar_type]>=0){
	    minw += vo_font->width[vo_osd_progbar_type]+vo_font->charspace+vo_font->spacewidth;
	}
	if (obj->bbox.x2 - obj->bbox.x1 < minw) return; // space too small, don't render anything
    }
    
    // render it:
    {	unsigned char *s;
   	unsigned char *sa;
        int i,w,h,st,mark;
   	int x=obj->x;
        int y=obj->y;
        int c,font;
   	int charw=vo_font->width[OSD_PB_0]+vo_font->charspace;
        int elems=obj->params.progbar.elems;

	if (vo_osd_progbar_value<=0)
     	   mark=0;
	else {
	   int ev=vo_osd_progbar_value*elems;
	   mark=ev>>8;
	   if (ev & 0xFF)  mark++;
	   if (mark>elems) mark=elems;
	}
   

//        printf("osd.progbar  width=%d  xpos=%d\n",width,x);

        c=vo_osd_progbar_type;
        if(vo_osd_progbar_type>0 && (font=vo_font->font[c])>=0) {
	    int xp=x-vo_font->width[c]-vo_font->spacewidth;
	   draw_alpha_buf(obj,(xp<0?0:xp),y,
              vo_font->width[c],
              vo_font->pic_a[font]->h,
              vo_font->pic_b[font]->bmp+vo_font->start[c],
              vo_font->pic_a[font]->bmp+vo_font->start[c],
              vo_font->pic_a[font]->w);
	}
   
        c=OSD_PB_START;
        if ((font=vo_font->font[c])>=0)
            draw_alpha_buf(obj,x,y,
              vo_font->width[c],
              vo_font->pic_a[font]->h,
              vo_font->pic_b[font]->bmp+vo_font->start[c],
              vo_font->pic_a[font]->bmp+vo_font->start[c],
              vo_font->pic_a[font]->w);
        x+=vo_font->width[c]+vo_font->charspace;

   	c=OSD_PB_0;
   	if ((font=vo_font->font[c])>=0){
	   w=vo_font->width[c];
	   h=vo_font->pic_a[font]->h;
	   s=vo_font->pic_b[font]->bmp+vo_font->start[c];
	   sa=vo_font->pic_a[font]->bmp+vo_font->start[c];
	   st=vo_font->pic_a[font]->w;
	   if ((i=mark)) do {
	       draw_alpha_buf(obj,x,y,w,h,s,sa,st);
	       x+=charw;
	   } while(--i);
	}

   	c=OSD_PB_1;
	if ((font=vo_font->font[c])>=0){
	   w=vo_font->width[c];
	   h=vo_font->pic_a[font]->h;
	   s =vo_font->pic_b[font]->bmp+vo_font->start[c];
	   sa=vo_font->pic_a[font]->bmp+vo_font->start[c];
	   st=vo_font->pic_a[font]->w;
	   if ((i=elems-mark)) do {
	       draw_alpha_buf(obj,x,y,w,h,s,sa,st);
	       x+=charw;
	   } while(--i);
	}

        c=OSD_PB_END;
        if ((font=vo_font->font[c])>=0)
            draw_alpha_buf(obj,x,y,
              vo_font->width[c],
              vo_font->pic_a[font]->h,
              vo_font->pic_b[font]->bmp+vo_font->start[c],
              vo_font->pic_a[font]->bmp+vo_font->start[c],
              vo_font->pic_a[font]->w);
//        x+=vo_font->width[c]+vo_font->charspace;

    }
//        vo_osd_progbar_value=(vo_osd_progbar_value+1)&0xFF;

}

subtitle* vo_sub=NULL;

// vo_draw_text_sub(int dxs,int dys,void (*draw_alpha)(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride))

inline static void vo_update_text_sub(mp_osd_obj_t* obj,int dxs,int dys){
   unsigned char *t;
   int c,i,j,l,x,y,font,prevc;
   int len;
   int k,lastk;
   int lastStripPosition;
   int xsize,lastxsize;
   int xmin=dxs,xmax=0;
   int h,lasth;
   
   obj->flags|=OSDFLAG_CHANGED|OSDFLAG_VISIBLE;

   if(!vo_sub || !vo_font || !sub_visibility){
       obj->flags&=~OSDFLAG_VISIBLE;
       return;
   }
   
   obj->bbox.y2=obj->y=dys;
   obj->params.subtitle.lines=0;

      // too long lines divide into a smaller ones
      i=k=lasth=0;
      h=vo_font->height;
      xsize=-vo_font->charspace;
      lastStripPosition=-1;
      l=vo_sub->lines;

      while (l) {
	  l--;
	  t=vo_sub->text[i++];	  
	  len=strlen(t)-1;
	  
//	  printf("sub(%d) '%s'\n",len,t);
//	  if(len<0) memy -=h; // according to max of vo_font->pic_a[font]->h 
//	  else

	  prevc = -1;

	  for (j=0;j<=len;j++){
	      if ((c=t[j])>=0x80){
		 if (sub_utf8){
		    if ((c & 0xe0) == 0xc0)    /* 2 bytes U+00080..U+0007FF*/
		       c = (c & 0x1f)<<6 | (t[++j] & 0x3f);
		    else if((c & 0xf0) == 0xe0){ /* 3 bytes U+00800..U+00FFFF*/
		       c = (((c & 0x0f)<<6) | (t[++j] & 0x3f))<<6;
		       c |= (t[++j] & 0x3f);
		    }
		 } else if (sub_unicode) 
		       c = (c<<8) + t[++j]; 
	      }
	      if (k==MAX_UCS){
		 len=j; // end here
		 mp_msg(MSGT_OSD,MSGL_WARN,"\nMAX_UCS exceeded!\n");
	      }
	      if (!c) c++; // avoid UCS 0
	      render_one_glyph(vo_font, c);
	      if (c==' '){
		 lastk=k;
		 lastStripPosition=j;
		 lastxsize=xsize;
 	      } else if ((!suboverlap_enabled) && ((font = vo_font->font[c]) >= 0)) {
 		/*
 		   With overlapping subtitles, we need to comment this out,
 		   beacuse that part of the code creates subtitles with the
 		   last line blank (" "): in this case previous 'if' statement
 		   is false an following 'if' is not executed. When, instead,
 		   a subtitle with a non-blank last line arrives, the following
 		   code is executed, and the result is a small 'jump' of the
 		   subtiles. We can not simply delete the following, unless
 		   having the last subtitle line partly drawn outside the
 		   screen, so, some lines forward, we introduce an increment
 		   which affects both blank and non-blank lines.
 		   *sfalco*
 		 */
		  if (vo_font->pic_a[font]->h > h){
		     h=vo_font->pic_a[font]->h;
		  }
	      }
	      obj->params.subtitle.utbl[k++]=c;
	      xsize+=vo_font->width[c]+vo_font->charspace+kerning(vo_font,prevc,c);
	      if (dxs*sub_width_p/100<xsize){
		  prevc = -1;
		 if (lastStripPosition>0){
		    j=lastStripPosition;
		    xsize=lastxsize;
		    k=lastk;
		 } else {
		    xsize -=vo_font->width[c]+vo_font->charspace+kerning(vo_font,prevc,c);; // go back
		    k--; // cut line here
		    while (t[j] && t[j]!=' ') j++; // jump to the nearest space
		 }
	      } else if (j<len) {
		  prevc = c;
		  continue;
	      }
	      if (h>obj->y){ // out of the screen so end parsing
		 obj->y -= lasth - vo_font->height; // correct the y position
		 l=0;
		 break;
	      }
	      obj->params.subtitle.utbl[k++]=0;
	      obj->params.subtitle.xtbl[obj->params.subtitle.lines++]=(dxs-xsize)/2;
	      if(xmin>(dxs-xsize)/2) xmin=(dxs-xsize)/2;
	      if(xmax<(dxs+xsize)/2) xmax=(dxs+xsize)/2;
	      if (obj->params.subtitle.lines==MAX_UCSLINES||k>MAX_UCS){
		 l=0; len=j; // end parsing
	      } else if(l || j<len){ // not the last line or not the last char
		 lastStripPosition=-1;
		 xsize=-vo_font->charspace;
		 lasth=h;
		 h=vo_font->height;
	      }
//	      printf("h: %d -> %d  \n",vo_font->height,h);
	      obj->y -=h; // according to max of vo_font->pic_a[font]->h 
	      prevc = -1;
	  }
      }

    /*
       Here is the little increment we talked about before. '40' is the
       ASCII code for '(', which, hopefully, is the highest char of the
       font.
       *sfalco*
     */
    if(suboverlap_enabled) obj->y -= vo_font->pic_a[vo_font->font[40]]->h - vo_font->height;

    h = dys - obj->y;
    if (sub_alignment == 2)
        obj->y = dys * sub_pos / 100 - h;
    else if (sub_alignment == 1)
        obj->y = dys * sub_pos / 100 - h / 2;
    else
        obj->y = dys * sub_pos / 100;

    if (obj->y < 0)
        obj->y = 0;
    if (obj->y > dys - h)
        obj->y = dys - h;

    obj->bbox.y2 = obj->y + h;

    // calculate bbox:
    obj->bbox.x1=xmin;
    obj->bbox.x2=xmax;
    obj->bbox.y1=obj->y;
//    obj->bbox.y2=obj->y+obj->params.subtitle.lines*vo_font->height;
    obj->flags|=OSDFLAG_BBOX;

    alloc_buf(obj);

    y = obj->y;
    
    i=j=0;
    if ((l=obj->params.subtitle.lines)) for (;;) {
 	 x=obj->params.subtitle.xtbl[i++]; 
	 prevc = -1;
	 while ((c=obj->params.subtitle.utbl[j++])){
	       x += kerning(vo_font,prevc,c);
	       if ((font=vo_font->font[c])>=0)
		  draw_alpha_buf(obj,x,y,
			     vo_font->width[c],
			     vo_font->pic_a[font]->h+y<obj->dys ? vo_font->pic_a[font]->h : obj->dys-y,
			     vo_font->pic_b[font]->bmp+vo_font->start[c],
			     vo_font->pic_a[font]->bmp+vo_font->start[c],
			     vo_font->pic_a[font]->w);
	       x+=vo_font->width[c]+vo_font->charspace;
               prevc = c;
	 }
         if (!--l) break;
         y+=vo_font->height;
    }
    
}

inline static void vo_update_spudec_sub(mp_osd_obj_t* obj, int dxs, int dys)
{
  unsigned int bbox[4];
  spudec_calc_bbox(vo_spudec, dxs, dys, bbox);
  obj->bbox.x1 = bbox[0];
  obj->bbox.x2 = bbox[1];
  obj->bbox.y1 = bbox[2];
  obj->bbox.y2 = bbox[3];
  obj->flags |= OSDFLAG_BBOX;
}

inline static void vo_draw_spudec_sub(mp_osd_obj_t* obj, void (*draw_alpha)(int x0, int y0, int w, int h, unsigned char* src, unsigned char* srca, int stride))
{
  spudec_draw_scaled(vo_spudec, obj->dxs, obj->dys, draw_alpha);
}

void *vo_spudec=NULL;
void *vo_vobsub=NULL;

static int draw_alpha_init_flag=0;

extern void vo_draw_alpha_init();

       mp_osd_obj_t* vo_osd_list=NULL;

mp_osd_obj_t* new_osd_obj(int type){
    mp_osd_obj_t* osd=malloc(sizeof(mp_osd_obj_t));
    memset(osd,0,sizeof(mp_osd_obj_t));
    osd->next=vo_osd_list;
    vo_osd_list=osd;
    osd->type=type;
    osd->alpha_buffer = NULL;
    osd->bitmap_buffer = NULL;
    osd->allocated = -1;
    return osd;
}

void free_osd_list(){
    mp_osd_obj_t* obj=vo_osd_list;
    while(obj){
	mp_osd_obj_t* next=obj->next;
	if (obj->alpha_buffer) free(obj->alpha_buffer);
	if (obj->bitmap_buffer) free(obj->bitmap_buffer);
	free(obj);
	obj=next;
    }
    vo_osd_list=NULL;
}

int vo_update_osd(int dxs,int dys){
    mp_osd_obj_t* obj=vo_osd_list;
    int chg=0;

#ifdef HAVE_FREETYPE    
    // here is the right place to get screen dimensions
    if (!vo_font || force_load_font) {
	force_load_font = 0;
	load_font_ft(dxs, dys);
    }
#endif

    while(obj){
      if(dxs!=obj->dxs || dys!=obj->dys || obj->flags&OSDFLAG_FORCE_UPDATE){
        int vis=obj->flags&OSDFLAG_VISIBLE;
	obj->flags&=~OSDFLAG_BBOX;
	switch(obj->type){
	case OSDTYPE_SUBTITLE:
	    vo_update_text_sub(obj,dxs,dys);
	    break;
	case OSDTYPE_PROGBAR:
	    vo_update_text_progbar(obj,dxs,dys);
	    break;
	case OSDTYPE_SPU:
	    if(sub_visibility && vo_spudec && spudec_visible(vo_spudec)){
	        vo_update_spudec_sub(obj, dxs, dys);
		obj->flags|=OSDFLAG_VISIBLE|OSDFLAG_CHANGED;
	    }
	    else
		obj->flags&=~OSDFLAG_VISIBLE;
	    break;
	case OSDTYPE_OSD:
	    if(vo_font && vo_osd_text && vo_osd_text[0]){
		vo_update_text_osd(obj,dxs,dys); // update bbox
		obj->flags|=OSDFLAG_VISIBLE|OSDFLAG_CHANGED;
	    } else
		obj->flags&=~OSDFLAG_VISIBLE;
	    break;
	}
	// check bbox:
	if(!(obj->flags&OSDFLAG_BBOX)){
	    // we don't know, so assume the whole screen changed :(
	    obj->bbox.x1=obj->bbox.y1=0;
	    obj->bbox.x2=dxs;
	    obj->bbox.y2=dys;
	    obj->flags|=OSDFLAG_BBOX;
	} else {
	    // check bbox, reduce it if it's out of bounds (corners):
	    if(obj->bbox.x1<0) obj->bbox.x1=0;
	    if(obj->bbox.y1<0) obj->bbox.y1=0;
	    if(obj->bbox.x2>dxs) obj->bbox.x2=dxs;
	    if(obj->bbox.y2>dys) obj->bbox.y2=dys;
	    if(obj->flags&OSDFLAG_VISIBLE)
	    // debug:
	    mp_msg(MSGT_OSD,MSGL_DBG2,"OSD update: %d;%d %dx%d  \n",
		obj->bbox.x1,obj->bbox.y1,obj->bbox.x2-obj->bbox.x1,
		obj->bbox.y2-obj->bbox.y1);
	}
	// check if visibility changed:
	if(vis != (obj->flags&OSDFLAG_VISIBLE) ) obj->flags|=OSDFLAG_CHANGED;
	// remove the cause of automatic update:
	obj->dxs=dxs; obj->dys=dys;
	obj->flags&=~OSDFLAG_FORCE_UPDATE;
      }
      if(obj->flags&OSDFLAG_CHANGED){
        chg|=1<<obj->type;
	mp_msg(MSGT_OSD,MSGL_DBG2,"OSD chg: %d  V: %s  pb:%d  \n",obj->type,(obj->flags&OSDFLAG_VISIBLE)?"yes":"no",vo_osd_progbar_type);
      }
      obj=obj->next;
    }
    return chg;
}

void vo_init_osd(){
    if(!draw_alpha_init_flag){
	draw_alpha_init_flag=1;
	vo_draw_alpha_init();
    }
    if(vo_osd_list) free_osd_list();
    // temp hack, should be moved to mplayer/mencoder later
    new_osd_obj(OSDTYPE_OSD);
    new_osd_obj(OSDTYPE_SUBTITLE);
    new_osd_obj(OSDTYPE_PROGBAR);
    new_osd_obj(OSDTYPE_SPU);
#ifdef HAVE_FREETYPE
    force_load_font = 1;
#endif
}

int vo_osd_changed_flag=0;

void vo_remove_text(int dxs,int dys,void (*remove)(int x0,int y0, int w,int h)){
    mp_osd_obj_t* obj=vo_osd_list;
    vo_update_osd(dxs,dys);
    while(obj){
      if(((obj->flags&OSDFLAG_CHANGED) || (obj->flags&OSDFLAG_VISIBLE)) && 
         (obj->flags&OSDFLAG_OLD_BBOX)){
          int w=obj->old_bbox.x2-obj->old_bbox.x1;
	  int h=obj->old_bbox.y2-obj->old_bbox.y1;
	  if(w>0 && h>0){
	      vo_osd_changed_flag=obj->flags&OSDFLAG_CHANGED;	// temp hack
              remove(obj->old_bbox.x1,obj->old_bbox.y1,w,h);
	  }
//	  obj->flags&=~OSDFLAG_OLD_BBOX;
      }
      obj=obj->next;
    }
}

void vo_draw_text(int dxs,int dys,void (*draw_alpha)(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride)){
    mp_osd_obj_t* obj=vo_osd_list;
    vo_update_osd(dxs,dys);
    while(obj){
      if(obj->flags&OSDFLAG_VISIBLE){
	vo_osd_changed_flag=obj->flags&OSDFLAG_CHANGED;	// temp hack
	switch(obj->type){
	case OSDTYPE_SPU:
	    vo_draw_spudec_sub(obj, draw_alpha); // FIXME
	    break;
	case OSDTYPE_OSD:
	case OSDTYPE_SUBTITLE:
	case OSDTYPE_PROGBAR:
	    vo_draw_text_from_buffer(obj,draw_alpha);
	    break;
	}
	obj->old_bbox=obj->bbox;
	obj->flags|=OSDFLAG_OLD_BBOX;
      }
      obj->flags&=~OSDFLAG_CHANGED;
      obj=obj->next;
    }
}

static int vo_osd_changed_status = 0;

int vo_osd_changed(int new_value)
{
    mp_osd_obj_t* obj=vo_osd_list;
    int ret = vo_osd_changed_status;
    vo_osd_changed_status = new_value;

    while(obj){
	if(obj->type==new_value) obj->flags|=OSDFLAG_FORCE_UPDATE;
	obj=obj->next;
    }

    return ret;
}

//      BBBBBBBBBBBB   AAAAAAAAAAAAA  BBBBBBBBBBB
//              BBBBBBBBBBBB  BBBBBBBBBBBBB
//                        BBBBBBB

// return TRUE if we have osd in the specified rectangular area:
int vo_osd_check_range_update(int x1,int y1,int x2,int y2){
    mp_osd_obj_t* obj=vo_osd_list;
    while(obj){
	if(obj->flags&OSDFLAG_VISIBLE){
	    if(	(obj->bbox.x1<=x2 && obj->bbox.x2>=x1) &&
		(obj->bbox.y1<=y2 && obj->bbox.y2>=y1) ) return 1;
	}
	obj=obj->next;
    }
    return 0;
}