rockbox/firmware/export/screendump.h

/***************************************************************************
 *             __________               __   ___.                  
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___  
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /  
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <   
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \  
 *                     \/            \/     \/    \/            \/ 
 * $Id$
 *
 * Copyright (C) 2009 by Jens Arnold
 *
 * 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 __SCREENDUMP_H__
#define __SCREENDUMP_H__

#include "config.h"

/* Make BMP colour map entries from R, G, B triples, without and with blending. */
#define RED_CMP(c)   (((c) >> 16) & 0xff)
#define GREEN_CMP(c) (((c) >> 8) & 0xff)
#define BLUE_CMP(c)  ((c) & 0xff)

#define BMP_COLOR(c)  BLUE_CMP(c), GREEN_CMP(c), RED_CMP(c), 0
#define BMP_COLOR_MIX(c1, c2, num, den) \
        (BLUE_CMP(c2)  - BLUE_CMP(c1))  * (num) / (den) + BLUE_CMP(c1),  \
        (GREEN_CMP(c2) - GREEN_CMP(c1)) * (num) / (den) + GREEN_CMP(c1), \
        (RED_CMP(c2)   - RED_CMP(c1))   * (num) / (den) + RED_CMP(c1),   0

#define LE16_CONST(x) (x)&0xff, ((x)>>8)&0xff
#define LE32_CONST(x) (x)&0xff, ((x)>>8)&0xff, ((x)>>16)&0xff, ((x)>>24)&0xff

#if LCD_DEPTH <= 4
#define DUMP_BMP_BPP 4
#define DUMP_BMP_LINESIZE ((LCD_WIDTH/2 + 3) & ~3)
#elif LCD_DEPTH <= 8
#define DUMP_BMP_BPP 8
#define DUMP_BMP_LINESIZE ((LCD_WIDTH + 3) & ~3)
#elif LCD_DEPTH <= 16
#define DUMP_BMP_BPP 16
#define DUMP_BMP_LINESIZE ((LCD_WIDTH*2 + 3) & ~3)
#else
#define DUMP_BMP_BPP 24
#define DUMP_BMP_LINESIZE ((LCD_WIDTH*3 + 3) & ~3)
#endif

#ifdef HAVE_SCREENDUMP

/* Save a .BMP file containing the current screen contents. */
void screen_dump(void);

void screen_dump_set_hook(void (*hook)(int fd));

#ifdef HAVE_REMOTE_LCD
/* Save a .BMP file containing the current remote screen contents. */
void remote_screen_dump(void);
#endif

#else /* !HAVE_SCREENDUMP */

#define screen_dump() do { } while(0)
#define remote_screen_dump() do { } while(0)

#endif /* HAVE_SCREENDUMP */

#endif /* __SCREENDUMP_H__ */