rockbox/apps/recorder/resize.h

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2008 by Akio Idehara
 *
 * 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 _RESIZE_H_
#define _RESIZE_H_

#include "config.h"
#include "lcd.h"

/****************************************************************
 * resize_on_load()
 *
 * resize bitmap on load with scaling
 *
 * If HAVE_LCD_COLOR then this func use smooth scaling algorithm
 * - downscaling both way use "Area Sampling"
 *   if IMG_RESIZE_BILINER or IMG_RESIZE_NEAREST is NOT set
 * - otherwise "Bilinear" or "Nearest Neighbour"
 *
 * If !(HAVE_LCD_COLOR) then use simple scaling algorithm "Nearest Neighbour"
 * 
 * return -1 for error
 ****************************************************************/

/* nothing needs the on-stack buffer right now */
#define MAX_SC_STACK_ALLOC 0
#define HAVE_UPSCALER 1

struct img_part {
    int len;
    struct uint8_rgb* buf;
};

int resize_on_load(struct bitmap *bm, bool dither,
                   struct dim *src,
                   struct rowset *tmp_row, bool remote,
#ifdef HAVE_LCD_COLOR
                   unsigned char *buf, unsigned int len,
#endif
                   struct img_part* (*store_part)(void *args),
                   bool (*skip_lines)(void *args, unsigned int lines),
                   void *args);
#endif /* _RESIZE_H_ */