apps/plugins/test_mem_jpeg.c

   1 /*****************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _// __ \_/ ___\|  |/ /| __ \ / __ \  \/  /
   5  *   Jukebox    |    |   ( (__) )  \___|    ( | \_\ ( (__) )    (
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2009 Andrew Mahone
  11  *
  12  * In-memory JPEG decode test.
  13  *
  14  * This program is free software; you can redistribute it and/or
  15  * modify it under the terms of the GNU General Public License
  16  * as published by the Free Software Foundation; either version 2
  17  * of the License, or (at your option) any later version.
  18  *
  19  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  20  * KIND, either express or implied.
  21  *
  22  ****************************************************************************/
  23
  24 #include "plugin.h"
  25 #include "lib/grey.h"
  26 #include "lib/jpeg_mem.h"
  27 PLUGIN_HEADER
  28
  29 /* different graphics libraries */
  30 #if LCD_DEPTH < 8
  31 #define USEGSLIB
  32 GREY_INFO_STRUCT
  33 #define MYLCD(fn) grey_ub_ ## fn
  34 #define MYLCD_UPDATE()
  35 #define MYXLCD(fn) grey_ub_ ## fn
  36 #define CFORMAT &format_grey
  37 #else
  38 #define MYLCD(fn) rb->lcd_ ## fn
  39 #define MYLCD_UPDATE() rb->lcd_update();
  40 #define MYXLCD(fn) xlcd_ ## fn
  41 #define CFORMAT &format_native
  42 #endif
  43
  44 /* this is the plugin entry point */
  45 enum plugin_status plugin_start(const void* parameter)
  46 {
  47     size_t plugin_buf_len;
  48     unsigned char * plugin_buf =
  49         (unsigned char *)rb->plugin_get_buffer(&plugin_buf_len);
  50     static char filename[MAX_PATH];
  51     struct bitmap bm = {
  52         .width = LCD_WIDTH,
  53         .height = LCD_HEIGHT,
  54     };
  55     int ret;
  56
  57     if(!parameter) return PLUGIN_ERROR;
  58
  59     rb->strcpy(filename, parameter);
  60
  61 #ifdef USEGSLIB
  62     long greysize;
  63     if (!grey_init(plugin_buf, plugin_buf_len, GREY_ON_COP,
  64                    LCD_WIDTH, LCD_HEIGHT, &greysize))
  65     {
  66         rb->splash(HZ, "grey buf error");
  67         return PLUGIN_ERROR;
  68     }
  69     plugin_buf += greysize;
  70     plugin_buf_len -= greysize;
  71 #endif
  72     int fd = rb->open(filename, O_RDONLY);
  73     if (fd < 0)
  74         return PLUGIN_ERROR;
  75     unsigned long filesize = rb->filesize(fd);
  76     if (filesize > plugin_buf_len)
  77         return PLUGIN_ERROR;
  78     plugin_buf_len -= filesize;
  79     unsigned char *jpeg_buf = plugin_buf;
  80     plugin_buf += filesize;
  81     rb->read(fd, jpeg_buf, filesize);
  82     rb->close(fd);
  83     bm.data = plugin_buf;
  84     ret = decode_jpeg_mem(jpeg_buf, filesize, &bm, plugin_buf_len,
  85                           FORMAT_NATIVE|FORMAT_RESIZE|FORMAT_KEEP_ASPECT,
  86                           CFORMAT);
  87     if (ret < 1)
  88         return PLUGIN_ERROR;
  89 #ifdef USEGSLIB
  90     grey_show(true);
  91     grey_ub_gray_bitmap((fb_data *)bm.data, (LCD_WIDTH - bm.width) >> 1,
  92         (LCD_HEIGHT - bm.height) >> 1, bm.width, bm.height);
  93 #else
  94     rb->lcd_bitmap((fb_data *)bm.data, (LCD_WIDTH - bm.width) >> 1,
  95         (LCD_HEIGHT - bm.height) >> 1, bm.width, bm.height);
  96 #endif
  97     MYLCD_UPDATE();
  98     while (rb->get_action(CONTEXT_STD,1) != ACTION_STD_OK) rb->yield();
  99 #ifdef USEGSLIB
 100     grey_release();
 101 #endif
 102     return PLUGIN_OK;
 103 }