private void InitializeFromFileLocation(String fileLocation, TileType tileType)
{
_fileLocation = fileLocation;
//load the image bytes
var source = new OriginalImage(fileLocation);
//ensure the source file is correct
var fileName = Path.GetFileName(fileLocation);
AssertValidFile(fileName, source);
ConstructTiles(source, tileType);
ConstructTags(fileName);
}
private void ConstructTiles(OriginalImage source, TileType tileType)
{
Tiles = new ObservableCollection<Tile>();
//break it down into x-number pixel square tiles
for (var tileRow = 0; tileRow < source.Height / Constants.TILE_PIXELS; tileRow++)
{
for (var tileColumn = 0; tileColumn < Constants.UNMANAGED_TILE_PIXEL_WIDTH / Constants.TILE_PIXELS; tileColumn++)
{
//we want to go one frame at a time
var tile = new Tile() { Type = tileType };
for (var frame = 0; frame * Constants.UNMANAGED_TILE_PIXEL_WIDTH < source.Width; frame++)
{
var tileFrame = new TileFrame();
var newBytes = new List<Byte>();
for (var row = 0; row < Constants.TILE_PIXELS; row++)
{
//for each row of this tile, grab the pixels from imagebytes
var totalRowOffset = tileRow * Constants.TILE_PIXELS + row;
var totalColumnOffset = Constants.UNMANAGED_TILE_PIXEL_WIDTH * frame + tileColumn * Constants.TILE_PIXELS;
var offset = source.CalculateImageByteArrayOffset(totalRowOffset, totalColumnOffset);
newBytes.AddRange(source.ImageBytes.Skip(offset).Take(4 * Constants.TILE_PIXELS)); //4 bytes per tile
}
tileFrame.SetSource(Constants.TILE_PIXELS, Constants.TILE_PIXELS, newBytes.ToArray());
tile.Frames.Add(tileFrame);
}
Tiles.Add(tile);
}
}
}
public Sprite(OriginalImage originalImage)
{
_originalImage = originalImage;
ImageBytes = null;
}
private void AssertValidFile(String fileName, OriginalImage source)
{
if (fileName.Contains(Constants.UNMANAGED_TILE_ANIMATED_IDENTIFIER))
{
//if a tile is animated, the pixel width should be a multiple of the anticipated width > 1
if (source.Width % Constants.UNMANAGED_TILE_PIXEL_WIDTH != 0 || source.Width / Constants.UNMANAGED_TILE_PIXEL_WIDTH <= 1)
{
throw new Exception(String.Format("New animated tile source width of {0} pixels is invalid.", source.Width));
}
}
else
{
//if a tile is not animated, it should have the expected width
if (source.Width != Constants.UNMANAGED_TILE_PIXEL_WIDTH)
{
throw new Exception(String.Format("New tile source width of {0} pixels is invalid.", source.Width));
}
}
}
public void Reset(OriginalImage originalImage)
{
_originalImage = originalImage;
Width = Height = 0;
BitmapSource = null;
}
