// parse and create a sprite sheet from a text file input stream
public static SpriteSheet parseFrom(StreamReader instream, ContentManager content)
{
if (instream == null || content == null)
{
return(null);
}
string input = null;
string data = null;
Variable v;
VariableSystem properties = new VariableSystem();
string spriteSheetName, spriteSheetFileName = null;
SpriteSheetType spriteSheetType = SpriteSheetType.Invalid;
Sprite spriteSheetImage = null;
SpriteSheet spriteSheet = null;
try {
while ((input = instream.ReadLine()) != null)
{
// trim the current line being read
data = input.Trim();
// if the line is blank, discard it
if (data.Length == 0)
{
continue;
}
// otherwise, if it contains information
else
{
// attempt to parse a variable from the data and store it
v = Variable.parseFrom(data);
// if successful, store it
if (v != null)
{
properties.add(v);
}
// if the variable is a specification of the number of sprites or
// the number of grids to be parsed, begin doing so
if (v != null && (v.id.Equals("Number of Sprites", StringComparison.OrdinalIgnoreCase) ||
v.id.Equals("Number of Grids", StringComparison.OrdinalIgnoreCase)))
{
// get the sprite sheet name and verify it exists
spriteSheetName = properties.getValue("SpriteSheet Name");
if (spriteSheetName == null)
{
return(null);
}
// parse the sprite sheet type and ensure it is valid
spriteSheetType = parseType(properties.getValue("SpriteSheet Type"));
if (spriteSheetType == SpriteSheetType.Invalid)
{
return(null);
}
// get the sprite sheet file name
spriteSheetFileName = properties.getValue("File Name");
if (spriteSheetFileName == null)
{
return(null);
}
// load the sprite to be parsed by the sprite sheet system
spriteSheetImage = new Sprite(spriteSheetFileName, content);
spriteSheetImage.type = SpriteType.Sheet;
// ===============================================================================
// Arbitrary Offset SpriteSheet ==================================================
// ===============================================================================
if (spriteSheetType == SpriteSheetType.ArbitraryOffsets)
{
VariableSystem spriteAttributes = new VariableSystem();
int numberOfSprites;
// verify that the number of sprites is valid
try { numberOfSprites = int.Parse(v.value); }
catch (Exception) { return(null); }
if (numberOfSprites <= 0)
{
return(null);
}
int spriteIndex;
string spriteName, spriteType;
Rectangle grid;
Rectangle[] offsets = new Rectangle[numberOfSprites];
string[] spriteNames = new string[numberOfSprites];
SpriteType[] spriteTypes = new SpriteType[numberOfSprites];
for (int i = 0; i < numberOfSprites; i++)
{
spriteNames[i] = null;
spriteTypes[i] = SpriteType.Unknown;
offsets[i] = new Rectangle(0, 0, 0, 0);
}
// loop through and collect the attributes for each sprite
for (int i = 0; i < numberOfSprites; i++)
{
spriteAttributes.clear();
// get the 5 sprite attributes (index, name, type, offset, size)
for (int j = 0; j < 5; j++)
{
spriteAttributes.add(Variable.parseFrom(instream.ReadLine()));
}
// store the sprite index value and validate it
try { spriteIndex = int.Parse(spriteAttributes.getValue("Sprite")); }
catch (Exception) { return(null); }
if (spriteIndex < 0 || spriteIndex >= numberOfSprites)
{
return(null);
}
// get the sprite name
spriteName = spriteAttributes.getValue("Name");
if (spriteName == null)
{
return(null);
}
// get the sprite type (as a string)
spriteType = spriteAttributes.getValue("Type");
if (spriteType == null)
{
return(null);
}
// parse the sprite's offset in its parent sprite sheet
string temp = spriteAttributes.getValue("Offset");
if (temp == null)
{
return(null);
}
string[] offsetValues = temp.Split(',');
if (offsetValues.Length != 2)
{
return(null);
}
// parse the size of the sprite
temp = spriteAttributes.getValue("Size");
if (temp == null)
{
return(null);
}
string[] sizeValues = temp.Split(',');
if (sizeValues.Length != 2)
{
return(null);
}
// attempt to create a source grid based off of these specifications
try { grid = new Rectangle(int.Parse(offsetValues[0]),
int.Parse(offsetValues[1]),
int.Parse(sizeValues[0]),
int.Parse(sizeValues[1])); }
catch (Exception) { return(null); }
// assign the values for temporary storage
spriteNames[spriteIndex] = spriteName;
spriteTypes[spriteIndex] = Sprite.parseType(spriteType);
offsets[spriteIndex] = new Rectangle(grid.X, grid.Y, grid.Width, grid.Height);
}
// once the attributes and offsets for all of the sprites have been collected, create the sprite sheet
spriteSheet = new SpriteSheet(spriteSheetImage, offsets);
spriteSheet.name = spriteSheetName;
// loop through the temporarily stored sprite attributes and assign them to each corresponding sprite
for (int i = 0; i < numberOfSprites; i++)
{
spriteSheet.getSprite(i).name = spriteNames[i];
spriteSheet.getSprite(i).index = i;
spriteSheet.getSprite(i).parentName = spriteSheetName;
spriteSheet.getSprite(i).type = spriteTypes[i];
}
}
// ===============================================================================
// Single Grid SpriteSheet =======================================================
// ===============================================================================
else if (spriteSheetType == SpriteSheetType.SingleGrid)
{
VariableSystem spriteAttributes = new VariableSystem();
Rectangle grid;
Axis direction;
int numberOfRows, numberOfColumns, numberOfSprites;
// get the number of sprites to obtain attributes for
try { numberOfSprites = int.Parse(v.value); }
catch (Exception) { return(null); }
// get the grid offset
string temp = properties.getValue("Offset");
if (temp == null)
{
return(null);
}
string[] offsetValues = temp.Split(',');
if (offsetValues.Length != 2)
{
return(null);
}
// get the size of each cell within the grid
temp = properties.getValue("Size");
if (temp == null)
{
return(null);
}
string[] sizeValues = temp.Split(',');
if (sizeValues.Length != 2)
{
return(null);
}
// convert the offset and cell size to a rectangle
try { grid = new Rectangle(int.Parse(offsetValues[0]),
int.Parse(offsetValues[1]),
int.Parse(sizeValues[0]),
int.Parse(sizeValues[1])); }
catch (Exception) { return(null); }
// get the direction to parse the sprites in
direction = parseAxis(properties.getValue("Direction"));
// get the number of rows in the grid
try { numberOfRows = int.Parse(properties.getValue("Number of Rows")); }
catch (Exception) { return(null); }
// get the number of columns in the grid
try { numberOfColumns = int.Parse(properties.getValue("Number of Columns")); }
catch (Exception) { return(null); }
// create the sprite sheet based on the corresponding specifications
spriteSheet = new SpriteSheet(spriteSheetImage,
grid,
direction,
numberOfRows,
numberOfColumns);
spriteSheet.name = spriteSheetName;
int spriteIndex;
string spriteName, spriteType;
// loop through the sprite sheet specifications
for (int i = 0; i < numberOfSprites; i++)
{
// obtain the 3 specifications for the current sprite (index, name, type)
for (int j = 0; j < 3; j++)
{
spriteAttributes.add(Variable.parseFrom(instream.ReadLine()));
}
// get the sprite index and verify it
try { spriteIndex = int.Parse(spriteAttributes.getValue("Sprite")); }
catch (Exception) { return(null); }
if (spriteIndex < 0 || spriteIndex >= spriteSheet.size())
{
return(null);
}
// get the sprite name
spriteName = spriteAttributes.getValue("Name");
if (spriteName == null)
{
return(null);
}
// get the sprite type (as a string)
spriteType = spriteAttributes.getValue("Type");
if (spriteType == null)
{
return(null);
}
// assign the attributes to the corresponding sprite
spriteSheet.getSprite(spriteIndex).name = spriteName;
spriteSheet.getSprite(spriteIndex).index = spriteIndex;
spriteSheet.getSprite(spriteIndex).parentName = spriteSheetName;
spriteSheet.getSprite(spriteIndex).type = Sprite.parseType(spriteType);
// clear the list of attributes presently associated with the current sprite
spriteAttributes.clear();
}
}
// ===============================================================================
// Multiple Grids SpriteSheet ====================================================
// ===============================================================================
else if (spriteSheetType == SpriteSheetType.MultipleGrids)
{
int numberOfGrids;
int spriteIndexOffset = 0;
// verify that the number of grids to parse is specified and valid
try { numberOfGrids = int.Parse(v.value); }
catch (Exception) { return(null); }
if (numberOfGrids < 1)
{
return(null);
}
// create an empty sprite sheet
spriteSheet = new SpriteSheet();
spriteSheet.name = spriteSheetName;
spriteSheet.image = spriteSheetImage;
// temporary storage
VariableSystem gridAttributes = new VariableSystem();
int[] numberOfSprites = new int[numberOfGrids];
Rectangle[] grid = new Rectangle[numberOfGrids];
Axis[] direction = new Axis[numberOfGrids];
int[] numberOfRows = new int[numberOfGrids];
int[] numberOfColumns = new int[numberOfGrids];
for (int i = 0; i < numberOfGrids; i++)
{
numberOfSprites[i] = -1;
grid[i] = new Rectangle(0, 0, 0, 0);
direction[i] = Axis.Horizontal;
numberOfRows[i] = -1;
numberOfColumns[i] = -1;
}
// loop through all of the grids
for (int i = 0; i < numberOfGrids; i++)
{
// obtain the 7 attributes for each grid (index, offset, size, parse direction, number of rows, number of columns, number of sprite attributes)
for (int j = 0; j < 7; j++)
{
gridAttributes.add(Variable.parseFrom(instream.ReadLine()));
}
// get the index of the current grid
int gridIndex;
try { gridIndex = int.Parse(gridAttributes.getValue("Grid")); }
catch (Exception) { return(null); }
if (gridIndex < 0 || gridIndex >= numberOfGrids)
{
return(null);
}
// get the number of sprites within the current grid and validate it
try { numberOfSprites[gridIndex] = int.Parse(gridAttributes.getValue("Number of Sprites")); }
catch (Exception) { return(null); }
// get the offset of the current grid
string temp = gridAttributes.getValue("Offset");
if (temp == null)
{
return(null);
}
string[] offsetValues = temp.Split(',');
if (offsetValues.Length != 2)
{
return(null);
}
// get the size of each cell within the current grid
temp = gridAttributes.getValue("Size");
if (temp == null)
{
return(null);
}
string[] sizeValues = temp.Split(',');
if (sizeValues.Length != 2)
{
return(null);
}
// create a rectangle representing the first cell in the current grid
try { grid[gridIndex] = new Rectangle(int.Parse(offsetValues[0]),
int.Parse(offsetValues[1]),
int.Parse(sizeValues[0]),
int.Parse(sizeValues[1])); }
catch (Exception) { return(null); }
// obtain the direction in which to parse the sprites from the current sprite sheet grid
direction[gridIndex] = parseAxis(gridAttributes.getValue("Direction"));
// get the number of rows in the current grid
try { numberOfRows[gridIndex] = int.Parse(gridAttributes.getValue("Number of Rows")); }
catch (Exception) { return(null); }
// get the number of columns in the current grid
try { numberOfColumns[gridIndex] = int.Parse(gridAttributes.getValue("Number of Columns")); }
catch (Exception) { return(null); }
// start parsing at the initial offset
// loop through all of the rows and columns incrementing the x position and y position as appropriate
// parse each sprite according to the current offset and size and store it in the main sprite collection
int xPos = grid[gridIndex].X;
int yPos = grid[gridIndex].Y;
for (int j = 0; j < numberOfRows[gridIndex]; j++)
{
for (int k = 0; k < numberOfColumns[gridIndex]; k++)
{
spriteSheet.addSprite(new Sprite(spriteSheetImage, new Rectangle(xPos, yPos, grid[gridIndex].Width, grid[gridIndex].Height)));
if (direction[gridIndex] == Axis.Horizontal)
{
xPos += grid[gridIndex].Width + 2;
}
else
{
yPos += grid[gridIndex].Height + 2;
}
}
if (direction[gridIndex] == Axis.Horizontal)
{
yPos += grid[gridIndex].Height + 2; xPos = grid[gridIndex].X;
}
else
{
xPos += grid[gridIndex].Width + 2; yPos = grid[gridIndex].Y;
}
}
int spriteIndex;
string spriteName, spriteType;
VariableSystem spriteAttributes = new VariableSystem();
// loop through the sprite attribute specifications for the current grid
for (int j = 0; j < numberOfSprites[gridIndex]; j++)
{
// read in the 3 sprite attributes (index, name, type) and store them
for (int k = 0; k < 3; k++)
{
spriteAttributes.add(Variable.parseFrom(instream.ReadLine()));
}
// get the sprite index and validate it
try { spriteIndex = spriteIndexOffset + int.Parse(spriteAttributes.getValue("Sprite")); }
catch (Exception) { return(null); }
if (spriteIndex < spriteIndexOffset || spriteIndex >= spriteSheet.size())
{
return(null);
}
// get the sprite name
spriteName = spriteAttributes.getValue("Name");
if (spriteName == null)
{
return(null);
}
// get the sprite type
spriteType = spriteAttributes.getValue("Type");
if (spriteType == null)
{
return(null);
}
// assign the current set of attributes to the corresponding sprite
spriteSheet.getSprite(spriteIndex).name = spriteName;
spriteSheet.getSprite(spriteIndex).index = spriteIndex;
spriteSheet.getSprite(spriteIndex).parentName = spriteSheetName;
spriteSheet.getSprite(spriteIndex).type = Sprite.parseType(spriteType);
// clear the current collection of sprite attributes
spriteAttributes.clear();
}
// clear the current collection of grid attributes and update the Sprite index offset (current position in the main SpriteSheet collection)
gridAttributes.clear();
spriteIndexOffset = spriteSheet.size();
}
}
// return null if sprite sheet type is invalid
else
{
return(null);
}
// return the current sprite sheet
return(spriteSheet);
}
}
}
}
catch (Exception) { }
return(null);
}