apps/plugins/test_greylib_bitmap_scale.c

   1 /*****************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _// __ \_/ ___\|  |/ /| __ \ / __ \  \/  /
   5  *   Jukebox    |    |   ( (__) )  \___|    ( | \_\ ( (__) )    (
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2008 Andrew Mahone
  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
  22 #include "plugin.h"
  23 #include "lib/grey.h"
  24 #include "lib/pluginlib_bmp.h"
  25 #include "lib/pluginlib_actions.h"
  26 /* this set the context to use with PLA */
  27 static const struct button_mapping *plugin_contexts[] = { pla_main_ctx };
  28 #define GBS_QUIT      PLA_EXIT
  29 #define GBS_QUIT2     PLA_CANCEL
  30
  31 #if LCD_DEPTH == 1
  32 #define BMP_LOAD read_bmp_file
  33 #else
  34 #define BMP_LOAD rb->read_bmp_file
  35 #endif
  36
  37
  38 GREY_INFO_STRUCT
  39 static unsigned char grey_bm_buf[LCD_WIDTH * LCD_HEIGHT +
  40                    BM_SCALED_SIZE(LCD_WIDTH,0,FORMAT_NATIVE,0)];
  41
  42 /* this is the plugin entry point */
  43 enum plugin_status plugin_start(const void* parameter)
  44 {
  45     void * plugin_buf;
  46     size_t plugin_buf_len;
  47     static char filename[MAX_PATH];
  48     struct bitmap grey_bm = {
  49         .width = LCD_WIDTH,
  50         .height = LCD_HEIGHT,
  51         .data = grey_bm_buf
  52     };
  53     int ret, x, y;
  54     int button = 0;
  55
  56     if(!parameter) return PLUGIN_ERROR;
  57
  58     rb->strcpy(filename, parameter);
  59
  60     ret = BMP_LOAD(filename, &grey_bm, sizeof(grey_bm_buf),
  61                    FORMAT_NATIVE|FORMAT_RESIZE|FORMAT_KEEP_ASPECT,
  62                    &format_grey);
  63
  64     if(ret < 1)
  65     {
  66         rb->splash(HZ*2, "failed to load bitmap");
  67         return PLUGIN_ERROR;
  68     }
  69
  70     plugin_buf = rb->plugin_get_buffer(&plugin_buf_len);
  71     if(!grey_init(plugin_buf, plugin_buf_len, 0, LCD_WIDTH, LCD_HEIGHT,
  72                   NULL))
  73     {
  74         rb->splash(HZ*2,"grey init failed");
  75         return PLUGIN_ERROR;
  76     }
  77     grey_ub_clear_display();
  78     x = (LCD_WIDTH - grey_bm.width) / 2;
  79     y = (LCD_HEIGHT - grey_bm.height) / 2;
  80     grey_ub_gray_bitmap(grey_bm_buf, x, y, grey_bm.width, grey_bm.height);
  81     grey_show(true);
  82
  83     /* wait until user closes plugin */
  84     while ((button != GBS_QUIT) && (button != GBS_QUIT2))
  85     {
  86         button = pluginlib_getaction(TIMEOUT_BLOCK, plugin_contexts,
  87                                                     ARRAYLEN(plugin_contexts));
  88     }
  89
  90     grey_release();
  91
  92     return PLUGIN_OK;
  93 }