/**

 * $Id: display.h,v 1.4 2007-01-27 12:03:53 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;

    gboolean line_double;

    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