/*
 * Copyright (C) 2000-2003 the xine project
 * 
 * This file is part of xine, a free video player.
 * 
 * xine is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 * 
 * xine 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
 *
 * OSD stuff (text and graphic primitives)
 */

#ifndef HAVE_OSD_H
#define HAVE_OSD_H

#ifdef HAVE_ICONV
#  include <iconv.h>
#endif

#ifdef XINE_COMPILE
#  include "video_overlay.h"
#  ifdef __OSD_C__
#    include "alphablend.h"
#  endif
#else
#  include <xine/video_overlay.h>
#endif

typedef struct osd_object_s osd_object_t;
typedef struct osd_renderer_s osd_renderer_t;
typedef struct osd_font_s osd_font_t;
typedef struct osd_ft2context_s osd_ft2context_t;

struct osd_object_s {
  osd_object_t *next;
  osd_renderer_t *renderer;

  int width, height;    /* work area dimentions */
  uint8_t *area;        /* work area */
  int display_x,display_y;  /* where to display it in screen */
  
  /* clipping box inside work area */
  int x1, y1;
  int x2, y2;
  
  uint32_t color[OVL_PALETTE_SIZE];	/* color lookup table  */
  uint8_t trans[OVL_PALETTE_SIZE];	/* mixer key table */

  int32_t handle;

#ifdef HAVE_ICONV
  iconv_t cd;                           /* iconv handle of encoding */
  char *encoding;                       /* name of encoding */
#endif
  
  osd_font_t *font;
  osd_ft2context_t *ft2;
};

/* this one is public */
struct xine_osd_s {
  osd_object_t osd;
};

struct osd_renderer_s {

  /*
   * open a new osd object. this will allocated an empty (all zero) drawing
   * area where graphic primitives may be used.
   * It is ok to specify big width and height values. The render will keep
   * track of the smallest changed area to not generate too big overlays.
   * A default palette is initialized (i sugest keeping color 0 as transparent
   * for the sake of simplicity)
   */
  osd_object_t* (*new_object) (osd_renderer_t *this, int width, int height);

  /*
   * free osd object
   */
  void (*free_object) (osd_object_t *osd_to_close);


  /*
   * send the osd to be displayed at given pts (0=now)
   * the object is not changed. there may be subsequent drawing  on it.
   */
  int (*show) (osd_object_t *osd, int64_t vpts );

  /*
   * send event to hide osd at given pts (0=now)
   * the object is not changed. there may be subsequent drawing  on it.
   */
  int (*hide) (osd_object_t *osd, int64_t vpts );

  /* 
   * draw point.
   */
  void (*point) (osd_object_t *osd, int x, int y, int color);
       
       /*
   * Bresenham line implementation on osd object
   */
  void (*line) (osd_object_t *osd,
		int x1, int y1, int x2, int y2, int color );
  
  /*
   * filled rectangle
   */
  void (*filled_rect) (osd_object_t *osd,
		       int x1, int y1, int x2, int y2, int color );

  /*
   * set palette (color and transparency)
   */
  void (*set_palette) (osd_object_t *osd, const uint32_t *color, const uint8_t *trans );

  /*
   * set on existing text palette 
   * (-1 to set used specified palette)
   *
   * color_base specifies the first color index to use for this text
   * palette. The OSD palette is then modified starting at this
   * color index, up to the size of the text palette.
   *
   * Use OSD_TEXT1, OSD_TEXT2, ... for some preasssigned color indices.
   */
  void (*set_text_palette) (osd_object_t *osd, int palette_number,
			    int color_base );
  
  /*
   * get palette (color and transparency)
   */
  void (*get_palette) (osd_object_t *osd, uint32_t *color, 
		       uint8_t *trans);

  /*
   * set position were overlay will be blended
   */
  void (*set_position) (osd_object_t *osd, int x, int y);

  /*
   * set the font of osd object
   */

  int (*set_font) (osd_object_t *osd, const char *fontname, int size);

  /*
   * set encoding of text
   *
   * NULL ... no conversion (iso-8859-1)
   * ""   ... locale encoding
   */
  int (*set_encoding) (osd_object_t *osd, const char *encoding);

  /*
   * render text in current encoding on x,y position
   * no \n yet
   *
   * The text is assigned the colors starting at the index specified by
   * color_base up to the size of the text palette. 
   *
   * Use OSD_TEXT1, OSD_TEXT2, ... for some preasssigned color indices.
   */
  int (*render_text) (osd_object_t *osd, int x1, int y1, 
		      const char *text, int color_base);

  /*
   * get width and height of how text will be renderized
   */
  int (*get_text_size) (osd_object_t *osd, const char *text, 
			int *width, int *height);

  /* 
   * close osd rendering engine
   * loaded fonts are unloaded
   * osd objects are closed
   */
  void (*close) (osd_renderer_t *this);

  /*
   * clear an osd object (empty drawing area)
   */
  void (*clear) (osd_object_t *osd );
    
  /*
   * paste a bitmap with optional palette mapping
   */
  void (*draw_bitmap) (osd_object_t *osd, uint8_t *bitmap,
		       int x1, int y1, int width, int height,
		       uint8_t *palette_map);

  /*
   * send the osd to be displayed (unscaled) at given pts (0=now)
   * the object is not changed. there may be subsequent drawing  on it.
   * overlay is blended at output (screen) resolution.
   */
  int (*show_unscaled) (osd_object_t *osd, int64_t vpts );

  /*
   * see xine.h for defined XINE_OSD_CAP_ values.
   */
  uint32_t (*get_capabilities) (osd_object_t *osd);
  
  /* private stuff */

  pthread_mutex_t             osd_mutex;
  video_overlay_event_t       event;
  osd_object_t               *osds;          /* instances of osd */
  osd_font_t                 *fonts;         /* loaded fonts */
  int                        textpalette;    /* default textpalette */
  
  xine_stream_t              *stream;

};

/*
 *   initialize the osd rendering engine
 */
osd_renderer_t *_x_osd_renderer_init( xine_stream_t *stream );


/*
 * The size of a text palette 
 */

#define TEXT_PALETTE_SIZE 11

/*
 * Preassigned color indices for rendering text
 * (more can be added, not exceeding OVL_PALETTE_SIZE)
 */

#define OSD_TEXT1 (0 * TEXT_PALETTE_SIZE)
#define OSD_TEXT2 (1 * TEXT_PALETTE_SIZE)
#define OSD_TEXT3 (2 * TEXT_PALETTE_SIZE)
#define OSD_TEXT4 (3 * TEXT_PALETTE_SIZE)
#define OSD_TEXT5 (4 * TEXT_PALETTE_SIZE)
#define OSD_TEXT6 (5 * TEXT_PALETTE_SIZE)
#define OSD_TEXT7 (6 * TEXT_PALETTE_SIZE)
#define OSD_TEXT8 (7 * TEXT_PALETTE_SIZE)
#define OSD_TEXT9 (8 * TEXT_PALETTE_SIZE)
#define OSD_TEXT10 (9 * TEXT_PALETTE_SIZE)

/* 
 * Defined palettes for rendering osd text
 * (more can be added later)
 */ 

#define NUMBER_OF_TEXT_PALETTES 4
#define TEXTPALETTE_WHITE_BLACK_TRANSPARENT    0
#define TEXTPALETTE_WHITE_NONE_TRANSPARENT     1
#define TEXTPALETTE_WHITE_NONE_TRANSLUCID      2
#define TEXTPALETTE_YELLOW_BLACK_TRANSPARENT   3
 
#ifdef __OSD_C__
 
/* This text descriptions are used for config screen */
static const char *textpalettes_str[NUMBER_OF_TEXT_PALETTES+1] = {
  "white-black-transparent",
  "white-none-transparent",
  "white-none-translucid",
  "yellow-black-transparent",    
  NULL};


/* 
   Palette entries as used by osd fonts:

   0: not used by font, always transparent
   1: font background, usually transparent, may be used to implement
      translucid boxes where the font will be printed.
   2-5: transition between background and border (usually only alpha
        value changes).
   6: font border. if the font is to be displayed without border this
      will probably be adjusted to font background or near.
   7-9: transition between border and foreground
   10: font color (foreground)   
*/

/* 
    The palettes below were made by hand, ie, i just throw
    values that seemed to do the transitions i wanted.
    This can surelly be improved a lot. [Miguel]
*/

static const clut_t textpalettes_color[NUMBER_OF_TEXT_PALETTES][TEXT_PALETTE_SIZE] = {
/* white, black border, transparent */
  {
    CLUT_Y_CR_CB_INIT(0x00, 0x00, 0x00), /*0*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*1*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*2*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*3*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*4*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*5*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*6*/
    CLUT_Y_CR_CB_INIT(0x40, 0x80, 0x80), /*7*/
    CLUT_Y_CR_CB_INIT(0x80, 0x80, 0x80), /*8*/
    CLUT_Y_CR_CB_INIT(0xc0, 0x80, 0x80), /*9*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*10*/
  },
  /* white, no border, transparent */
  {
    CLUT_Y_CR_CB_INIT(0x00, 0x00, 0x00), /*0*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*1*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*2*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*3*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*4*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*5*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*6*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*7*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*8*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*9*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*10*/
  },
  /* white, no border, translucid */
  {
    CLUT_Y_CR_CB_INIT(0x00, 0x00, 0x00), /*0*/
    CLUT_Y_CR_CB_INIT(0x80, 0x80, 0x80), /*1*/
    CLUT_Y_CR_CB_INIT(0x80, 0x80, 0x80), /*2*/
    CLUT_Y_CR_CB_INIT(0x80, 0x80, 0x80), /*3*/
    CLUT_Y_CR_CB_INIT(0x80, 0x80, 0x80), /*4*/
    CLUT_Y_CR_CB_INIT(0x80, 0x80, 0x80), /*5*/
    CLUT_Y_CR_CB_INIT(0x80, 0x80, 0x80), /*6*/
    CLUT_Y_CR_CB_INIT(0xa0, 0x80, 0x80), /*7*/
    CLUT_Y_CR_CB_INIT(0xc0, 0x80, 0x80), /*8*/
    CLUT_Y_CR_CB_INIT(0xe0, 0x80, 0x80), /*9*/
    CLUT_Y_CR_CB_INIT(0xff, 0x80, 0x80), /*10*/
  },
  /* yellow, black border, transparent */
  {
    CLUT_Y_CR_CB_INIT(0x00, 0x00, 0x00), /*0*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*1*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*2*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*3*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*4*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*5*/
    CLUT_Y_CR_CB_INIT(0x00, 0x80, 0x80), /*6*/
    CLUT_Y_CR_CB_INIT(0x40, 0x84, 0x60), /*7*/
    CLUT_Y_CR_CB_INIT(0x70, 0x88, 0x40), /*8*/
    CLUT_Y_CR_CB_INIT(0xb0, 0x8a, 0x20), /*9*/
    CLUT_Y_CR_CB_INIT(0xff, 0x90, 0x00), /*10*/
  },
};

static const uint8_t textpalettes_trans[NUMBER_OF_TEXT_PALETTES][TEXT_PALETTE_SIZE] = {
  {0, 0, 3, 6, 8, 10, 12, 14, 15, 15, 15 },
  {0, 0, 0, 0, 0, 0, 2, 6, 9, 12, 15 },
  {0, 8, 9, 10, 11, 12, 13, 14, 15, 15, 15 },
  {0, 0, 3, 6, 8, 10, 12, 14, 15, 15, 15 },
};

#endif /* __OSD_C__ */

#endif

