apps/recorder/resize.h

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 by Akio Idehara
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #ifndef _RESIZE_H_
  22 #define _RESIZE_H_
  23
  24 #include "config.h"
  25 #include "lcd.h"
  26 #include "inttypes.h"
  27
  28 /****************************************************************
  29  * resize_on_load()
  30  *
  31  * resize bitmap on load with scaling
  32  *
  33  * If HAVE_LCD_COLOR then this func use smooth scaling algorithm
  34  * - downscaling both way use "Area Sampling"
  35  *   if IMG_RESIZE_BILINER or IMG_RESIZE_NEAREST is NOT set
  36  * - otherwise "Bilinear" or "Nearest Neighbour"
  37  *
  38  * If !(HAVE_LCD_COLOR) then use simple scaling algorithm "Nearest Neighbour"
  39  *
  40  * return -1 for error
  41  ****************************************************************/
  42
  43 /* nothing needs the on-stack buffer right now */
  44 #define MAX_SC_STACK_ALLOC 0
  45 #define HAVE_UPSCALER 1
  46
  47 struct img_part {
  48     int len;
  49 #if !defined(HAVE_LCD_COLOR) && \
  50         (LCD_DEPTH > 1 || (defined(HAVE_REMOTE_LCD) && LCD_REMOTE_DEPTH > 1))
  51     uint8_t *buf;
  52 #else
  53     struct uint8_rgb* buf;
  54 #endif
  55 };
  56
  57 #ifdef HAVE_LCD_COLOR
  58 /* intermediate type used by the scaler for color output. greyscale version
  59    uses uint32_t
  60 */
  61 struct uint32_rgb {
  62     uint32_t r;
  63     uint32_t g;
  64     uint32_t b;
  65 };
  66 #endif
  67
  68 int recalc_dimension(struct dim *dst, struct dim *src);
  69
  70 int resize_on_load(struct bitmap *bm, bool dither,
  71                    struct dim *src, struct rowset *tmp_row,
  72                    unsigned char *buf, unsigned int len,
  73                    struct img_part* (*store_part)(void *args),
  74                    void *args);
  75 #endif /* _RESIZE_H_ */