private MagickImage RenderFrame(Image rawFrameImage, ConstAnimationFrame frameAnimationInfo, int smallestX, int largestX, int smallestY, int largestY, int normalizedWidth, int normalizedHeight)
{
MagickImage renderedFrame = new MagickImage(new MagickColor(0, 0, 0, 0), normalizedWidth, normalizedHeight);
int normalizedFrameX = rawFrameImage.Attributes.LocationX - smallestX;
int normalizedFrameY = rawFrameImage.Attributes.LocationY - smallestY;
if (rawFrameImage.PixelData.Length > 0)
{
MagickReadSettings pixelDataSettings = new MagickReadSettings()
{
ColorSpace = ColorSpace.RGB,
Width = rawFrameImage.Attributes.Width,
Height = rawFrameImage.Attributes.Height,
PixelStorage = new PixelStorageSettings(StorageType.Char, "RGBA")
};
using (MagickImage rawFrameMagickImage = new MagickImage(rawFrameImage.PixelData, pixelDataSettings))
{
rawFrameMagickImage.Format = MagickFormat.Gif;
rawFrameMagickImage.MatteColor = new MagickColor(0, 0, 0, 0);
renderedFrame.Composite(rawFrameMagickImage, normalizedFrameX, normalizedFrameY, CompositeOperator.Over);
}
}
renderedFrame.Format = MagickFormat.Gif;
renderedFrame.AnimationDelay = frameAnimationInfo.DelayInMs / 10;
renderedFrame.GifDisposeMethod = GifDisposeMethod.Background;
renderedFrame.AnimationIterations = 0;
renderedFrame.MatteColor = new MagickColor(0, 0, 0, 0);
return(renderedFrame);
}
/// <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());
}
}
