/**

  * $Id: display.h,v 1.3 2007-01-25 11:46:35 nkeynes Exp $

  *

  * The PC side of the video support (responsible for actually displaying / 

  * rendering frames)

  *

  * Copyright (c) 2005 Nathan Keynes.

  *

  * This program 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.

  *

  * This program 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.

  */

 #ifndef dream_video_H

 #define dream_video_H

 #include <stdint.h>

 #include <glib.h>

 #include <GL/gl.h>

 #ifdef __cplusplus

 extern "C" {

 #endif

 /**

  * Supported colour formats. Note that ARGB4444 is only ever used for texture

  * rendering (it's not valid for display purposes).

  */

 #define COLFMT_ARGB1555  0

 #define COLFMT_RGB565    1

 #define COLFMT_ARGB4444  2

 #define COLFMT_YUV422    3 /* 8-bit YUV (texture source only) */

 #define COLFMT_RGB888    4 /* 24-bit RGB */

 #define COLFMT_ARGB8888  5

 #define COLFMT_INDEX4    6 /* 4 bit indexed colour (texture source only) */

 #define COLFMT_INDEX8    7 /* 8-bit indexed colour (texture source only) */

 #define COLFMT_RGB0888   8 /* 32-bit RGB */

 struct colour_format {

     GLint type, format, int_format;

     int bpp;

 };

 extern struct colour_format colour_formats[];

 extern int colour_format_bytes[];

 typedef struct video_buffer {

     uint32_t hres;

     uint32_t vres;

     uint32_t rowstride;

     int colour_format;

     char *data;

 } *video_buffer_t;

 /**

  * Core video driver - expected to directly support an OpenGL context

  */

 typedef struct display_driver {

     char *name;

     /**

      * Initialize the driver. This is called only once at startup time, and

      * is guaranteed to be called before any other methods.

      * @return TRUE if the driver was successfully initialized, otherwise

      * FALSE.

      */

     gboolean (*init_driver)(void);

     /**

      * Cleanly shutdown the driver. Normally only called at system shutdown

      * time.

      */

     void (*shutdown_driver)(void);

     /**

      * Given a particular keysym, return the keycode associated with it.

      * @param keysym The keysym to be resolved, ie "Tab"

      * @return the display-specific keycode, or 0 if the keysym cannot

      * be resolved.

      */

     uint16_t (*resolve_keysym)( const gchar *keysym );

     /**

      * Set the current display format to the specified values. This is

      * called immediately prior to any display frame call where the

      * parameters have changed from the previous frame

      */

     gboolean (*set_display_format)( uint32_t hres, uint32_t vres, 

 				    int colour_fmt );

     /**

      * Set the current rendering format to the specified values. This is

      * called immediately prior to starting rendering of a frame where the

      * parameters have changed from the previous frame. Note that the driver

      * is not required to precisely support the requested colour format.

      *

      * This method is also responsible for setting up an appropriate GL

      * context for the main engine to render into.

      *

      * @param hres The horizontal resolution (ie 640)

      * @param vres The vertical resolution (ie 480)

      * @param colour_fmt The colour format of the buffer (ie COLFMT_ARGB4444)

      * @param texture Flag indicating that the frame being rendered is a

      * texture, rather than a display frame. 

      */

     gboolean (*set_render_format)( uint32_t hres, uint32_t vres,

 				   int colour_fmt, gboolean texture );

     /**

      * Display a single frame using the supplied pixmap data. Is assumed to

      * invalidate the current GL front buffer (but not the back buffer).

      */

     gboolean (*display_frame)( video_buffer_t buffer );

     /**

      * Display a single blanked frame using a fixed colour for the

      * entire frame (specified in RGB888 format). Is assumed to invalidate

      * the current GL front buffer (but not the back buffer).

      */

     gboolean (*display_blank_frame)( uint32_t rgb );

     /**

      * Promote the current render back buffer to the front buffer

      */

     void (*display_back_buffer)( void );

 } *display_driver_t;

 void video_open( void );

 void video_update_frame( void );

 void video_update_size( int, int, int );

 extern uint32_t pvr2_frame_counter;

 extern display_driver_t display_driver;

 extern struct display_driver display_gtk_driver;

 extern struct display_driver display_null_driver;

 /****************** Input methods **********************/

 typedef void (*input_key_callback_t)( void *data, uint32_t value, gboolean isKeyDown );

 gboolean input_register_key( const gchar *keysym, input_key_callback_t callback,

 			     void *data, uint32_t value );

 void input_unregister_key( const gchar *keysym );

 gboolean input_is_key_valid( const gchar *keysym );

 gboolean input_is_key_registered( const gchar *keysym );

 void input_event_keydown( uint16_t keycode );

 void input_event_keyup( uint16_t keycode );

 #ifdef __cplusplus

 }

 #endif

 #endif