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 #include "lib/mylcd.h"
  28 PLUGIN_HEADER
  29
  30 /* different graphics libraries */
  31 #if LCD_DEPTH < 8
  32 #define USEGSLIB
  33 GREY_INFO_STRUCT
  34 #define CFORMAT &format_grey
  35 #else
  36 #define CFORMAT &format_native
  37 #endif
  38
  39 /* this is the plugin entry point */
  40 enum plugin_status plugin_start(const void* parameter)
  41 {
  42     size_t plugin_buf_len;
  43     unsigned char * plugin_buf =
  44         (unsigned char *)rb->plugin_get_buffer(&plugin_buf_len);
  45     static char filename[MAX_PATH];
  46     struct bitmap bm = {
  47         .width = LCD_WIDTH,
  48         .height = LCD_HEIGHT,
  49     };
  50     int ret;
  51
  52     if(!parameter) return PLUGIN_ERROR;
  53
  54     rb->strcpy(filename, parameter);
  55
  56 #ifdef USEGSLIB
  57     long greysize;
  58     if (!grey_init(plugin_buf, plugin_buf_len, GREY_ON_COP,
  59                    LCD_WIDTH, LCD_HEIGHT, &greysize))
  60     {
  61         rb->splash(HZ, "grey buf error");
  62         return PLUGIN_ERROR;
  63     }
  64     plugin_buf += greysize;
  65     plugin_buf_len -= greysize;
  66 #endif
  67     int fd = rb->open(filename, O_RDONLY);
  68     if (fd < 0)
  69         return PLUGIN_ERROR;
  70     unsigned long filesize = rb->filesize(fd);
  71     if (filesize > plugin_buf_len)
  72         return PLUGIN_ERROR;
  73     plugin_buf_len -= filesize;
  74     unsigned char *jpeg_buf = plugin_buf;
  75     plugin_buf += filesize;
  76     rb->read(fd, jpeg_buf, filesize);
  77     rb->close(fd);
  78     bm.data = plugin_buf;
  79     ret = decode_jpeg_mem(jpeg_buf, filesize, &bm, plugin_buf_len,
  80                           FORMAT_NATIVE|FORMAT_RESIZE|FORMAT_KEEP_ASPECT,
  81                           CFORMAT);
  82     if (ret < 1)
  83         return PLUGIN_ERROR;
  84 #ifdef USEGSLIB
  85     grey_show(true);
  86     grey_ub_gray_bitmap((fb_data *)bm.data, (LCD_WIDTH - bm.width) >> 1,
  87         (LCD_HEIGHT - bm.height) >> 1, bm.width, bm.height);
  88 #else
  89     rb->lcd_bitmap((fb_data *)bm.data, (LCD_WIDTH - bm.width) >> 1,
  90         (LCD_HEIGHT - bm.height) >> 1, bm.width, bm.height);
  91 #endif
  92     mylcd_ub_update();
  93     while (rb->get_action(CONTEXT_STD,1) != ACTION_STD_OK) rb->yield();
  94 #ifdef USEGSLIB
  95     grey_release();
  96 #endif
  97     return PLUGIN_OK;
  98 }