Method readImages

examples/pframe/BitmapManager.cpp:109–160

 */

bool BitmapManager::readImages() {

  char buffer[30];
  uint8_t block[512];
  uint32_t blockIndex,i,j,actuallyRead;
  FileSystem& fs=_fsManager.getFileSystem();
  File *file;
  BlockDevice& sdcard=_fsManager.getSdCard();

  // allocate enough blocks from the free space to hold the image data

  if(!_fsManager.allocateBlocks(_imageCount))
    return false;

  // status

  _term << "Caching images.\n";

  blockIndex=_fsManager.getFirstCacheBlock();

  for(i=0;i<_imageCount;i++) {

    // read and cache the image

    strcpy(buffer,"/pframe/img/");
    StringUtil::itoa(i,buffer+12,10);
    strcat(buffer,".262");

    if(!fs.openFile(buffer,file))
      return error("Failed to open file");

    _term.clearLine();
    _term << "Image: " << (i+1) << '/' << _imageCount;

    // 640 blocks/image (2 per row, 320 rows / image)
    // each block contains 1 scan line (240*4 bytes)

    for(j=0;j<640;j++) {

      if(!file->read(block,480,actuallyRead) || actuallyRead!=480)
        return error("IO error reading image");

      if(!sdcard.writeBlock(block,blockIndex++))
        return error("IO error writing to card");
    }

    delete file;
  }

  _term << '\n';
  return true;
}


/*