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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148/**************************************************************************** __________ __ ___.* Open \______ \ ____ ____ | | _\_ |__ _______ ___* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \* \/ \/ \/ \/ \/** Floating on-screen display** Copyright (C) 2012 Michael Sevakis** 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY* KIND, either express or implied.*****************************************************************************/#ifndef OSD_H#define OSD_H
/* At this time: assumes use of the default viewport for normal drawing */
/* Callback implemented by user. Paramters are OSD vp-relative coordinates */typedef void (* osd_draw_cb_fn_t)(int x, int y, int width, int height);
/* Initialize the OSD, set its backbuffer, update callback and enable it if * the call succeeded. */enum osd_init_flags{ OSD_INIT_MAJOR_WIDTH = 0x0, /* Width guides buffer dims (default) */ OSD_INIT_MAJOR_HEIGHT = 0x1, /* Height guides buffer dims */ OSD_INIT_MINOR_MIN = 0x2, /* Treat minor axis dim as a minimum */ OSD_INIT_MINOR_MAX = 0x4, /* Treat minor axis dim as a maximum */ /* To get exact minor size, combine min/max flags */};bool osd_init(unsigned flags, void *backbuf, size_t backbuf_size, osd_draw_cb_fn_t draw_cb, int *width, int *height, size_t *bufused);
/* Destroy the OSD, rendering it disabled */void osd_destroy(void);
enum{ OSD_HIDE = 0x0, /* Hide from view */ OSD_SHOW = 0x1, /* Bring into view, updating if needed */ OSD_UPDATENOW = 0x2, /* Force update even if nothing changed */};
/* Show/Hide the OSD on screen returning previous status */bool osd_show(unsigned flags);
/* Redraw the entire OSD returning true if screen update occurred */bool osd_update(void);
/* Redraw part of the OSD (OSD viewport-relative coordinates) returning true if any screen update occurred */bool osd_update_rect(int x, int y, int width, int height);
/* Set a new screen location and size (screen coordinates) */bool osd_update_pos(int x, int y, int width, int height);
/* Call periodically to have the OSD timeout and hide itself */void osd_monitor_timeout(void);
/* Set the OSD timeout value. 'timeout' <= 0 == never timeout */void osd_set_timeout(long timeout);
/* Use the OSD viewport context */struct viewport * osd_get_viewport(void);
/* Get the maximum buffer dimensions calculated by osd_init() */void osd_get_max_dims(int *maxwidth, int *maxheight);
/* Is the OSD enabled? */bool osd_enabled(void);
/** Functions that must be used in lieu of regular LCD functions for this ** to work. ** ** To be efficient, as much drawing as possible should be combined between ** *prepare and *update. ** ** osd_lcd_update_prepare(); ** <draw stuff using lcd_* routines> ** osd_lcd_update[_rect](); ** ** TODO: Make it work seamlessly with greylib and regular LCD functions. **/
/* Prepare LCD frambuffer for regular drawing - call before any other LCD function */void osd_lcd_update_prepare(void);
/* Update the whole screen and restore OSD if it is visible */void osd_lcd_update(void);
/* Update a part of the screen and restore OSD if it is visible */void osd_lcd_update_rect(int x, int y, int width, int height);
#if LCD_DEPTH < 4/* Like other functions but for greylib surface (requires GREY_BUFFERED) */bool osd_grey_init(unsigned flags, void *backbuf, size_t backbuf_size, osd_draw_cb_fn_t draw_cb, int *width, int *height, size_t *bufused);void osd_grey_destroy(void);bool osd_grey_show(unsigned flags);bool osd_grey_update(void);bool osd_grey_update_rect(int x, int y, int width, int height);bool osd_grey_update_pos(int x, int y, int width, int height);void osd_grey_monitor_timeout(void);void osd_grey_set_timeout(long timeout);struct viewport * osd_grey_get_viewport(void);void osd_grey_get_max_dims(int *maxwidth, int *maxheight);bool osd_grey_enabled(void);void osd_grey_lcd_update_prepare(void);void osd_grey_lcd_update(void);void osd_grey_lcd_update_rect(int x, int y, int width, int height);#endif /* LCD_DEPTH < 4 */
/* MYLCD-style helper defines to compile with different graphics libs */#ifdef __GREY_H__#define myosd_(fn) osd_grey_##fn#else#define myosd_(fn) osd_##fn#endif
#define myosd_init myosd_(init)#define myosd_destroy myosd_(destroy)#define myosd_show myosd_(show)#define myosd_update myosd_(update)#define myosd_update_rect myosd_(update_rect)#define myosd_update_pos myosd_(update_pos)#define myosd_monitor_timeout myosd_(monitor_timeout)#define myosd_set_timeout myosd_(set_timeout)#define myosd_get_viewport myosd_(get_viewport)#define myosd_get_max_dims myosd_(get_max_dims)#define myosd_enabled myosd_(enabled)#define myosd_lcd_update_prepare myosd_(lcd_update_prepare)#define myosd_lcd_update myosd_(lcd_update)#define myosd_lcd_update_rect myosd_(lcd_update_rect)
#endif /* OSD_H */