/// <summary>
/// Initializes a new instance of the <see cref="TextureDocumentViewModel" /> class.
/// </summary>
/// <param name="document">The TextureDocument.</param>
/// <exception cref="ArgumentNullException">
/// <paramref name="document"/> is <see langword="null"/>.
/// </exception>
public TextureDocumentViewModel(TextureDocument document)
: base(document)
{
// Disable unsupported color channels.
var channels = TextureHelper.GetColorChannels(document.Texture2D.Format);
if ((channels & ColorChannels.Red) != 0)
{
EnableRedChannel = true;
IsRedChannelSupported = true;
}
if ((channels & ColorChannels.Green) != 0)
{
EnableGreenChannel = true;
IsGreenChannelSupported = true;
}
if ((channels & ColorChannels.Blue) != 0)
{
EnableBlueChannel = true;
IsBlueChannelSupported = true;
}
if ((channels & ColorChannels.Alpha) != 0)
{
EnableAlphaChannel = true;
IsAlphaChannelSupported = true;
}
AlphaBlendTypes = new[] { "Straight alpha", "Premultiplied alpha" };
MipLevelNames = new string[document.Texture2D.LevelCount];
for (int i = 0; i < document.Texture2D.LevelCount; i++)
{
MipLevelNames[i] = Invariant($"Mip level {i}");
}
ChangeMipLevelCommand = new DelegateCommand <object>(ChangeMipLevel);
}
/// <inheritdoc/>
protected override void OnLoad()
{
Texture2D?.Dispose();
Texture2D = null;
_monoGameContent?.Dispose();
_monoGameContent = null;
// TODO: Asynchronously load textures.
string fileName = Uri.LocalPath;
string extension = Path.GetExtension(fileName);
bool isXnb = string.Compare(extension, ".XNB", StringComparison.OrdinalIgnoreCase) == 0;
if (isXnb)
{
try
{
string directoryName = Path.GetDirectoryName(fileName);
_monoGameContent = _monoGameService.LoadXnb(directoryName, fileName, cacheResult: false);
Texture2D = (Texture2D)_monoGameContent.Asset;
}
catch
{
Texture2D?.Dispose();
Texture2D = null;
_monoGameContent?.Dispose();
_monoGameContent = null;
throw;
}
}
else
{
Texture2D = TextureHelper.LoadTexture(_graphicsService, Uri.LocalPath);
}
UpdateProperties();
}