/// <summary>
/// Removes a state from a DMI File
/// </summary>
/// <param name="toRemove">The DMIState to remove</param>
/// <returns>True if the state was removed, otherwise false</returns>
public bool RemoveState(DMIState toRemove)
{
if (toRemove != null && toRemove.Data != null && _states.Remove(toRemove))
{
return(Metadata.States.Remove(toRemove.Data));
}
else
{
return(false);
}
}
/// <summary>
/// Adds a state to a DMI File
/// </summary>
/// <param name="toAdd">The DMIState to add</param>
/// <returns>True if the state was added, otherwise false</returns>
public bool AddState(DMIState toAdd)
{
if (StateValidForFile(toAdd) && toAdd?.Data != null)
{
_states.Add(toAdd);
Metadata.States.Add(toAdd.Data);
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Processes DMI metadata into DMI State objects.
/// </summary>
/// <param name="source">The stream containing the DMI file data.</param>
/// <returns>An enumerable collection of DMI State objects representing the states of the DMI File.</returns>
private IEnumerable <DMIState> GetStates(Stream source)
{
var states = new List <DMIState>();
using (var img = Image.Load <Rgba32>(source))
{
// DMI data did not include widths or heights, assume that it is then
// perfect squares, thus we will determine the w/h programatically...
if (Metadata.FrameWidth == -1 || Metadata.FrameHeight == -1)
{
var totalFrames = Metadata.States.Sum(x => x.Frames * x.Dirs);
for (int rows = 1; totalFrames >= rows; rows++)
{
if (img.Width / (totalFrames / rows) == img.Height / rows)
{
Metadata.FrameHeight = img.Height / rows;
Metadata.FrameWidth = img.Width / (totalFrames / rows);
}
}
}
if (Metadata.FrameHeight == 0 || Metadata.FrameWidth == 0)
{
return(states);
}
int wFrames = img.Width / Metadata.FrameWidth;
int hFrames = img.Height / Metadata.FrameHeight;
int processedImages = 0;
int currWIndex = 0;
int currHIndex = 0;
foreach (var state in Metadata.States)
{
var toAdd = new DMIState(state, img, currWIndex, wFrames, currHIndex, hFrames, Metadata.FrameWidth, Metadata.FrameHeight);
processedImages += toAdd.TotalFrames;
currHIndex = processedImages / wFrames;
currWIndex = processedImages % wFrames;
states.Add(toAdd);
}
}
return(states);
}
/// <summary>
/// Ensures that a state is valid for a DMI File's existing dimensions
/// </summary>
/// <param name="toCheck">The DMIState to check against the file</param>
/// <returns>True if the state is compatable with the file, false otherwise</returns>
private bool StateValidForFile(DMIState toCheck)
{
return(toCheck != null &&
toCheck.Height == Metadata.FrameHeight &&
toCheck.Width == Metadata.FrameWidth);
}