/// <summary>
/// Creates an animated GIF and writes it to <paramref name="outputStream"/>.
/// </summary>
/// <param name="animation"></param>
/// <param name="outputStream"></param>
public void Create(ConstRawAnimation animation, Stream outputStream)
{
List <Image> rawFrames = new List <Image>();
// Load each image in the animation.
foreach (ConstAnimationFrame frame in animation.Frames)
{
NpkPath frameImagePath = frame.Image.ImageFilePath;
DFO.Common.Images.Image rawFrame = m_imageSource.GetImage(frameImagePath, frame.Image.FrameIndex);
rawFrames.Add(rawFrame);
}
int smallestX;
int largestX;
int smallestY;
int largestY;
// Frames can have different start positions and widths/heights. Normalize the images to a common coordinate system.
FrameInfo.GetNormalizedCoordinates(rawFrames.Select(image => image.Attributes), out smallestX, out largestX, out smallestY, out largestY);
int normalizedWidth = largestX - smallestX + 1;
int normalizedHeight = largestY - smallestY + 1;
List <MagickImage> renderedFrames = new List <MagickImage>();
try
{
// Composite each frame on top of a canvas of normalized width and height.
for (int frameIndex = 0; frameIndex < animation.Frames.Count; frameIndex++)
{
Image rawFrameImage = rawFrames[frameIndex];
ConstAnimationFrame frameAnimationInfo = animation.Frames[frameIndex];
MagickImage renderedFrame = RenderFrame(rawFrameImage, frameAnimationInfo, smallestX, largestX, smallestY, largestY, normalizedWidth, normalizedHeight);
renderedFrames.Add(renderedFrame);
}
// Make the GIF from the frames and write it out to the stream.
using (MagickImageCollection frameCollection = new GraphicsMagick.MagickImageCollection(renderedFrames))
{
frameCollection.Write(outputStream, MagickFormat.Gif);
}
}
finally
{
renderedFrames.ForEach(f => f.Dispose());
}
}
private void RefreshFrameList()
{
// Clear frame list
FrameList.Clear();
// Get current selected inner file
InnerNpkFile selectedFile = InnerFileList.Current;
// If none selected nothing else to do here
if (selectedFile == null)
{
return;
}
// Get the list of frames. Since it's lazy loaded, there could be a read error.
List <FrameInfo> frames;
try
{
frames = _editor.Frames[selectedFile.Path].ToList();
}
catch (Exception ex)
{
// TODO: Better way of displaying than modal?
// At least get the view to show it instead of the view model
MessageBox.Show(string.Format("Error reading frames from NPK file: {0}", ex.Message));
return;
}
_smallestX = 0;
_largestX = 0;
_smallestY = 0;
_largestY = 0;
_width = 1;
_height = 1;
List <FrameInfo> nonLinkFrames = frames.Where(f => f.LinkFrame == null).ToList();
if (nonLinkFrames.Count > 0)
{
FrameInfo.GetNormalizedCoordinates(nonLinkFrames, out _smallestX, out _largestX, out _smallestY, out _largestY);
_width = _largestX - _smallestX + 1;
_height = _largestY - _smallestY + 1;
}
// Populate frame list
for (int frameIndex = 0; frameIndex < frames.Count; frameIndex++)
{
FrameInfo frame = frames[frameIndex];
// if linked frame, follow link
if (frame.LinkFrame != null)
{
int linkIndex = frame.LinkFrame.Value;
if (linkIndex < 0 || linkIndex >= frames.Count)
{
// TODO: Log error that link is out of range?
FrameList.Add(new FrameMetadata(frameIndex, 0, 0, 0, 0, linkIndex));
}
else
{
FrameInfo linkedFrame = frames[linkIndex];
FrameList.Add(new FrameMetadata(linkedFrame, frameIndex, linkIndex));
}
}
else
{
FrameList.Add(new FrameMetadata(frame, frameIndex, linkFrameIndex: null));
}
}
}