/// <summary>
/// Function to create a new image codec object.
/// </summary>
/// <param name="codec">The name of the codec to look up within the plug in.</param>
/// <returns>A new instance of a <see cref="IGorgonAnimationCodec"/>.</returns>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="codec"/> parameter is <b>null</b>.</exception>
/// <exception cref="ArgumentEmptyException">Thrown when the <paramref name="codec"/> parameter is empty.</exception>
/// <exception cref="KeyNotFoundException">Thrown when the <paramref name="codec"/> was not found in this plug in.</exception>
/// <remarks>
/// <para>
/// If the <paramref name="codec"/> is not found within the plug in, then an exception will be thrown. To determine whether the plug in has the desired <paramref name="codec"/>, check the
/// <see cref="Codecs"/> property on the plug in to locate the plug in name.
/// </para>
/// </remarks>
public IGorgonAnimationCodec CreateCodec(string codec)
{
if (codec == null)
{
throw new ArgumentNullException(nameof(codec));
}
if (string.IsNullOrWhiteSpace(codec))
{
throw new ArgumentEmptyException(nameof(codec));
}
if (!Codecs.Any(item => string.Equals(codec, item.Name, StringComparison.OrdinalIgnoreCase)))
{
throw new KeyNotFoundException(string.Format(Resources.GOR2DIO_ERR_CODEC_NOT_IN_PLUGIN, codec));
}
IGorgonAnimationCodec result = OnCreateCodec(codec);
if (result == null)
{
throw new KeyNotFoundException(string.Format(Resources.GOR2DIO_ERR_CODEC_NOT_IN_PLUGIN, codec));
}
return(result);
}
/// <summary>
/// Function to load a <see cref="IGorgonAnimation"/> from a <see cref="GorgonFileSystem"/>.
/// </summary>
/// <param name="fileSystem">The file system to load the animation from.</param>
/// <param name="renderer">The renderer for the animation.</param>
/// <param name="path">The path to the animation file in the file system.</param>
/// <param name="textureOptions">[Optional] Options for the texture loaded associated the sprite.</param>
/// <param name="animationCodecs">The list of animation codecs to try and load the animation with.</param>
/// <param name="imageCodecs">The list of image codecs to try and load the animation texture(s) with.</param>
/// <returns>The animation data in the file as a <see cref="IGorgonAnimation"/>.</returns>
/// <exception cref="ArgumentNullException">Thrown when the <paramref name="fileSystem"/>, <paramref name="renderer"/>, or <paramref name="path"/> parameter is <b>null</b>.</exception>
/// <exception cref="ArgumentEmptyException">Thrown when the <paramref name="path"/> parameter is empty.</exception>
/// <exception cref="FileNotFoundException">Thrown if the file in the <paramref name="path"/> was not found.</exception>
/// <exception cref="GorgonException">Thrown if the animation data in the file system could not be loaded because a suitable codec was not found.</exception>
/// <remarks>
/// <para>
/// This method extends a <see cref="GorgonFileSystem"/> so that animations can be loaded by calling a method on the file system object itself. This negates the need for users to create complex code
/// for loading an animation.
/// </para>
/// <para>
/// When loading an animation, the method will attempt to locate any <see cref="GorgonTexture2DView"/> objects associated with the animation (if they exist). When loading, it will check:
/// <list type="number">
/// <item>
/// <description>For a texture resource with the same name that is already loaded into memory.</description>
/// </item>
/// <item>
/// <description>Use the local <see cref="IGorgonVirtualDirectory"/> for the sprite file and search for the texture in that directory.</description>
/// </item>
/// <item>
/// <description>Check the entire <paramref name="fileSystem"/> for a file if the texture name contains path information (this is done by the GorgonEditor from v2).</description>
/// </item>
/// </list>
/// If the file is found, and can be loaded by one of the <paramref name="imageCodecs"/>, then it is loaded and assigned to the sprite.
/// </para>
/// <para>
/// The <paramref name="animationCodecs"/> is a list of codecs for loading sprite data. If the user specifies this parameter, the only the codecs provided will be used for determining if an
/// animation can be read. If it is not supplied, then all built-in (i.e. not plug in based) sprite codecs will be used.
/// </para>
/// <para>
/// The <paramref name="imageCodecs"/> is a list of codecs for loading image data. If the user specifies this parameter, the only the codecs provided will be used for determining if an image can be
/// read. If it is not supplied, then all built-in (i.e. not plug in based) image codecs will be used.
/// </para>
/// </remarks>
/// <seealso cref="GorgonFileSystem"/>
/// <seealso cref="GorgonTexture2DView"/>
/// <seealso cref="IGorgonAnimation"/>
public static IGorgonAnimation LoadAnimationFromFileSystem(this GorgonFileSystem fileSystem,
Gorgon2D renderer,
string path,
GorgonTexture2DLoadOptions textureOptions = null,
IEnumerable <IGorgonAnimationCodec> animationCodecs = null,
IEnumerable <IGorgonImageCodec> imageCodecs = null)
{
if (fileSystem == null)
{
throw new ArgumentNullException(nameof(fileSystem));
}
IGorgonVirtualFile file = fileSystem.GetFile(path);
if (file == null)
{
throw new FileNotFoundException(string.Format(Resources.GOR2DIO_ERR_FILE_NOT_FOUND, path));
}
if ((imageCodecs == null) || (!imageCodecs.Any()))
{
// If we don't specify any codecs, then use the built in ones.
imageCodecs = new IGorgonImageCodec[]
{
new GorgonCodecPng(),
new GorgonCodecBmp(),
new GorgonCodecDds(),
new GorgonCodecGif(),
new GorgonCodecJpeg(),
new GorgonCodecTga(),
};
}
else
{
// Only use codecs that can decode image data.
imageCodecs = imageCodecs.Where(item => item.CanDecode);
}
if ((animationCodecs == null) || (!animationCodecs.Any()))
{
// Use all built-in codecs if we haven't asked for any.
animationCodecs = new IGorgonAnimationCodec[]
{
new GorgonV3AnimationBinaryCodec(renderer),
new GorgonV3AnimationJsonCodec(renderer),
new GorgonV1AnimationCodec(renderer)
};
}
else
{
// Only use codecs that can decode sprite data.
animationCodecs = animationCodecs.Where(item => item.CanDecode);
}
Stream animStream = file.OpenStream();
try
{
if (!animStream.CanSeek)
{
Stream newStream = new DataStream((int)animStream.Length, true, true);
animStream.CopyTo(newStream);
newStream.Position = 0;
animStream.Dispose();
animStream = newStream;
}
IGorgonAnimationCodec animationCodec = GetAnimationCodec(animStream, animationCodecs);
if (animationCodec == null)
{
throw new GorgonException(GorgonResult.CannotRead, string.Format(Resources.GOR2DIO_ERR_NO_SUITABLE_ANIM_CODEC_FOUND, path));
}
// Load the animation.
IGorgonAnimation animation = animationCodec.FromStream(animStream, (int)file.Size);
// We have no textures to update, leave.
if (animation.Texture2DTrack.KeyFrames.Count == 0)
{
return(animation);
}
// Try to locate the textures.
// V1 sprite animations need texture coordinate correction.
bool needsCoordinateFix = animationCodec is GorgonV1AnimationCodec;
foreach (GorgonKeyTexture2D textureKey in animation.Texture2DTrack.KeyFrames)
{
// Let's try and load the texture into memory.
// This does this by:
// 1. Checking to see if a texture resource with the name specified is already available in memory.
// 2. Checking the local directory of the file to see if the texture is there.
// 3. A file system wide search.
// ReSharper disable once InvertIf
(IGorgonImageCodec codec, IGorgonVirtualFile textureFile, bool loaded) =
LocateTextureCodecAndFile(fileSystem, file.Directory, renderer, textureKey.TextureName, imageCodecs);
// We have not loaded the texture yet. Do so now.
// ReSharper disable once InvertIf
if ((!loaded) && (textureFile != null) && (codec != null))
{
using (Stream textureStream = textureFile.OpenStream())
{
textureKey.Value = GorgonTexture2DView.FromStream(renderer.Graphics,
textureStream,
codec,
textureFile.Size, GetTextureOptions(textureFile.FullPath, textureOptions));
}
}
if ((needsCoordinateFix) && (textureKey.Value != null))
{
textureKey.TextureCoordinates = new RectangleF(textureKey.TextureCoordinates.X / textureKey.Value.Width,
textureKey.TextureCoordinates.Y / textureKey.Value.Height,
textureKey.TextureCoordinates.Width / textureKey.Value.Width,
textureKey.TextureCoordinates.Height / textureKey.Value.Height);
}
}
return(animation);
}
finally
{
animStream?.Dispose();
}
}
