radio/src/gui/screenshot.cpp

   1 /*
   2  * Copyright (C) OpenTX
   3  *
   4  * Based on code named
   5  *   th9x - http://code.google.com/p/th9x
   6  *   er9x - http://code.google.com/p/er9x
   7  *   gruvin9x - http://code.google.com/p/gruvin9x
   8  *
   9  * License GPLv2: http://www.gnu.org/licenses/gpl-2.0.html
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License version 2 as
  13  * published by the Free Software Foundation.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  */
  20
  21 #include "opentx.h"
  22
  23 const uint8_t BMP_HEADER[] = {
  24   0x42, 0x4d, 0xF8, 0x1A, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x76, 0x00, 0x00, 0x00, 0x28, 0x00,
  25   0x00, 0x00, LCD_W,  0x00, 0x00, 0x00, LCD_H, 0x00, 0x00, 0x00, 0x01, 0x00, 0x04, 0x00, 0x00, 0x00,
  26   0x00, 0x00, 0x02, 0x04, 0x00, 0x00, 0xbc, 0x38, 0x00, 0x00, 0xbc, 0x38, 0x00, 0x00, 0x00, 0x00,
  27   0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0x00, 0xee, 0xee, 0xee, 0x00, 0xdd, 0xdd,
  28   0xdd, 0x00, 0xcc, 0xcc, 0xcc, 0x00, 0xbb, 0xbb, 0xbb, 0x00, 0xaa, 0xaa, 0xaa, 0x00, 0x99, 0x99,
  29   0x99, 0x00, 0x88, 0x88, 0x88, 0x00, 0x77, 0x77, 0x77, 0x00, 0x66, 0x66, 0x66, 0x00, 0x55, 0x55,
  30   0x55, 0x00, 0x44, 0x44, 0x44, 0x00, 0x33, 0x33, 0x33, 0x00, 0x22, 0x22, 0x22, 0x00, 0x11, 0x11,
  31   0x11, 0x00, 0x00, 0x00, 0x00, 0x00
  32 };
  33
  34 const char * writeScreenshot()
  35 {
  36   FIL bmpFile;
  37   UINT written;
  38   char filename[42]; // /SCREENSHOTS/screen-2013-01-01-123540.bmp
  39
  40   // check and create folder here
  41   strcpy_P(filename, SCREENSHOTS_PATH);
  42   const char * error = sdCheckAndCreateDirectory(filename);
  43   if (error) {
  44     return error;
  45   }
  46
  47   char * tmp = strAppend(&filename[sizeof(SCREENSHOTS_PATH)-1], "/screen");
  48   tmp = strAppendDate(tmp, true);
  49   strcpy(tmp, BMP_EXT);
  50
  51   FRESULT result = f_open(&bmpFile, filename, FA_CREATE_ALWAYS | FA_WRITE);
  52   if (result != FR_OK) {
  53     return SDCARD_ERROR(result);
  54   }
  55
  56   result = f_write(&bmpFile, BMP_HEADER, sizeof(BMP_HEADER), &written);
  57   if (result != FR_OK || written != sizeof(BMP_HEADER)) {
  58     f_close(&bmpFile);
  59     return SDCARD_ERROR(result);
  60   }
  61
  62   for (int y=LCD_H-1; y>=0; y-=1) {
  63     for (int x=0; x<8*((LCD_W+7)/8); x+=2) {
  64       uint8_t byte = getPixel(x+1, y) + (getPixel(x, y) << 4);
  65       f_write(&bmpFile, &byte, 1, &written);
  66       if (result != FR_OK || written != 1) {
  67         f_close(&bmpFile);
  68         return SDCARD_ERROR(result);
  69       }
  70     }
  71   }
  72
  73   f_close(&bmpFile);
  74
  75   return NULL;
  76 }