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_resize.h"
  25 #include "lib/pluginlib_bmp.h"
  26
  27 #if LCD_DEPTH == 1
  28 #define BMP_LOAD read_bmp_file
  29 #else
  30 #define BMP_LOAD rb->read_bmp_file
  31 #endif
  32
  33 PLUGIN_HEADER
  34 GREY_INFO_STRUCT
  35 static unsigned char grey_bm_buf[LCD_WIDTH * LCD_HEIGHT +
  36                    BM_SCALED_SIZE(LCD_WIDTH,0,FORMAT_NATIVE,0)];
  37 static unsigned char grey_display_buf[2*LCD_WIDTH * LCD_HEIGHT];
  38
  39 static const struct plugin_api* rb; /* global api struct pointer */
  40
  41 MEM_FUNCTION_WRAPPERS(rb)
  42
  43 /* this is the plugin entry point */
  44 enum plugin_status plugin_start(const struct plugin_api* api, const void* parameter)
  45 {
  46     static char filename[MAX_PATH];
  47     struct bitmap grey_bm = {
  48         .width = LCD_WIDTH,
  49         .height = LCD_HEIGHT,
  50         .data = grey_bm_buf
  51     };
  52     int ret, x, y;
  53
  54     if(!parameter) return PLUGIN_ERROR;
  55
  56     rb = api;
  57
  58     rb->strcpy(filename, parameter);
  59
  60 #if LCD_DEPTH == 1
  61     bmp_init(rb);
  62     resize_init(rb);
  63 #endif
  64
  65     ret = BMP_LOAD(filename, &grey_bm, sizeof(grey_bm_buf),
  66                    FORMAT_NATIVE|FORMAT_RESIZE|FORMAT_KEEP_ASPECT,
  67                    &format_grey);
  68
  69     if(ret < 1)
  70     {
  71         rb->splash(HZ*2, "failed to load bitmap");
  72         return PLUGIN_ERROR;
  73     }
  74
  75     long buf_taken;
  76     if(!grey_init(rb, &grey_display_buf[0], sizeof(grey_display_buf), 0,
  77                   LCD_WIDTH, LCD_HEIGHT, &buf_taken))
  78     {
  79         rb->splash(HZ*2,"grey init failed");
  80         return PLUGIN_ERROR;
  81     }
  82     grey_ub_clear_display();
  83     x = (LCD_WIDTH - grey_bm.width) / 2;
  84     y = (LCD_HEIGHT - grey_bm.height) / 2;
  85     grey_ub_gray_bitmap(grey_bm_buf, x, y, grey_bm.width, grey_bm.height);
  86     grey_show(true);
  87
  88     rb->button_get(true);
  89
  90     grey_release();
  91
  92     return PLUGIN_OK;
  93 }