public static ResultStatus ImportTextureImage(TextureTool textureTool, TexImage texImage, ImportParameters parameters, CancellationToken cancellationToken, Logger logger) { var assetManager = new ContentManager(); // Apply transformations textureTool.Decompress(texImage, parameters.IsSRgb); // Special case when the input texture is monochromatic but it is supposed to be a color and we are working in SRGB // In that case, we need to transform it to a supported SRGB format (R8G8B8A8_UNorm_SRgb) // TODO: As part of a conversion phase, this code may be moved to a dedicated method in this class at some point if (parameters.TextureHint == TextureHint.Color && parameters.IsSRgb && (texImage.Format == PixelFormat.R8_UNorm || texImage.Format == PixelFormat.A8_UNorm)) { textureTool.Convert(texImage, PixelFormat.R8G8B8A8_UNorm_SRgb); } if (cancellationToken.IsCancellationRequested) // abort the process if cancellation is demanded return ResultStatus.Cancelled; var fromSize = new Size2(texImage.Width, texImage.Height); var targetSize = parameters.DesiredSize; // Resize the image if (parameters.IsSizeInPercentage) { targetSize = new Size2((int)(fromSize.Width * targetSize.Width / 100.0f), (int)(fromSize.Height * targetSize.Height / 100.0f)); } // determine the alpha format of the texture when set to Auto // Note: this has to be done before the ColorKey transformation in order to be able to take advantage of image file AlphaDepth information if (parameters.DesiredAlpha == AlphaFormat.Auto) { var colorKey = parameters.ColorKeyEnabled ? (Color?)parameters.ColorKeyColor : null; var alphaLevel = textureTool.GetAlphaLevels(texImage, new Rectangle(0, 0, texImage.Width, texImage.Height), colorKey, logger); parameters.DesiredAlpha = alphaLevel.ToAlphaFormat(); } // Find the target size var outputFormat = DetermineOutputFormat(parameters, targetSize, texImage.Format); targetSize = FindBestTextureSize(parameters, outputFormat, targetSize, logger); // Resize the image only if needed if (targetSize != fromSize) { textureTool.Resize(texImage, targetSize.Width, targetSize.Height, Filter.Rescaling.Lanczos3); } if (cancellationToken.IsCancellationRequested) // abort the process if cancellation is demanded return ResultStatus.Cancelled; // Apply the color key if (parameters.ColorKeyEnabled) textureTool.ColorKey(texImage, parameters.ColorKeyColor); if (cancellationToken.IsCancellationRequested) // abort the process if cancellation is demanded return ResultStatus.Cancelled; // Pre-multiply alpha only for relevant formats if (parameters.PremultiplyAlpha && texImage.Format.HasAlpha32Bits()) textureTool.PreMultiplyAlpha(texImage); if (cancellationToken.IsCancellationRequested) // abort the process if cancellation is demanded return ResultStatus.Cancelled; // Generate mipmaps if (parameters.GenerateMipmaps) { var boxFilteringIsSupported = !texImage.Format.IsSRgb() || (MathUtil.IsPow2(targetSize.Width) && MathUtil.IsPow2(targetSize.Height)); textureTool.GenerateMipMaps(texImage, boxFilteringIsSupported? Filter.MipMapGeneration.Box: Filter.MipMapGeneration.Linear); } if (cancellationToken.IsCancellationRequested) // abort the process if cancellation is demanded return ResultStatus.Cancelled; // Convert/Compress to output format // TODO: Change alphaFormat depending on actual image content (auto-detection)? outputFormat = DetermineOutputFormat(parameters, targetSize, texImage.Format); textureTool.Compress(texImage, outputFormat, (TextureConverter.Requests.TextureQuality)parameters.TextureQuality); if (cancellationToken.IsCancellationRequested) // abort the process if cancellation is demanded return ResultStatus.Cancelled; // Save the texture using (var outputImage = textureTool.ConvertToXenkoImage(texImage)) { if (cancellationToken.IsCancellationRequested) // abort the process if cancellation is demanded return ResultStatus.Cancelled; assetManager.Save(parameters.OutputUrl, outputImage.ToSerializableVersion()); logger.Verbose("Compression successful [{3}] to ({0}x{1},{2})", outputImage.Description.Width, outputImage.Description.Height, outputImage.Description.Format, parameters.OutputUrl); } return ResultStatus.Successful; }