mirror of https://github.com/SixLabors/ImageSharp
James Jackson-South
4 years ago
6 changed files with 124 additions and 130 deletions
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// Copyright (c) Six Labors.
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// Licensed under the Six Labors Split License.
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namespace SixLabors.ImageSharp.Formats.Webp; |
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/// <summary>
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/// Configuration options for use during webp encoding.
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/// </summary>
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internal interface IWebpEncoderOptions |
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{ |
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/// <summary>
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/// Gets the webp file format used. Either lossless or lossy.
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/// Defaults to lossy.
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/// </summary>
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WebpFileFormatType? FileFormat { get; } |
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/// <summary>
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/// Gets the compression quality. Between 0 and 100.
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/// For lossy, 0 gives the smallest size and 100 the largest. For lossless,
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/// this parameter is the amount of effort put into the compression: 0 is the fastest but gives larger
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/// files compared to the slowest, but best, 100.
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/// Defaults to 75.
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/// </summary>
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int Quality { get; } |
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/// <summary>
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/// Gets the encoding method to use. Its a quality/speed trade-off (0=fast, 6=slower-better).
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/// Defaults to 4.
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/// </summary>
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WebpEncodingMethod Method { get; } |
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/// <summary>
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/// Gets a value indicating whether the alpha plane should be compressed with Webp lossless format.
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/// Defaults to true.
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/// </summary>
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bool UseAlphaCompression { get; } |
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/// <summary>
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/// Gets the number of entropy-analysis passes (in [1..10]).
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/// Defaults to 1.
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/// </summary>
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int EntropyPasses { get; } |
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/// <summary>
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/// Gets the amplitude of the spatial noise shaping. Spatial noise shaping (or sns for short) refers to a general collection of built-in algorithms
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/// used to decide which area of the picture should use relatively less bits, and where else to better transfer these bits.
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/// The possible range goes from 0 (algorithm is off) to 100 (the maximal effect).
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/// Defaults to 50.
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/// </summary>
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int SpatialNoiseShaping { get; } |
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/// <summary>
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/// Gets the strength of the deblocking filter, between 0 (no filtering) and 100 (maximum filtering).
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/// A value of 0 will turn off any filtering. Higher value will increase the strength of the filtering process applied after decoding the picture.
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/// The higher the value the smoother the picture will appear.
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/// Typical values are usually in the range of 20 to 50.
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/// Defaults to 60.
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/// </summary>
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int FilterStrength { get; } |
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/// <summary>
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/// Gets a value indicating whether to preserve the exact RGB values under transparent area. Otherwise, discard this invisible
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/// RGB information for better compression.
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/// The default value is Clear.
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/// </summary>
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WebpTransparentColorMode TransparentColorMode { get; } |
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/// <summary>
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/// Gets a value indicating whether near lossless mode should be used.
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/// This option adjusts pixel values to help compressibility, but has minimal impact on the visual quality.
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/// </summary>
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bool NearLossless { get; } |
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/// <summary>
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/// Gets the quality of near-lossless image preprocessing. The range is 0 (maximum preprocessing) to 100 (no preprocessing, the default).
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/// The typical value is around 60. Note that lossy with -q 100 can at times yield better results.
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/// </summary>
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int NearLosslessQuality { get; } |
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} |
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