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@ -17,6 +17,10 @@ internal sealed class LzwTiffCompression : TiffBaseDecompressor |
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private readonly TiffColorType colorType; |
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private readonly bool isTiled; |
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private readonly int tileWidth; |
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/// <summary>
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/// Initializes a new instance of the <see cref="LzwTiffCompression" /> class.
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/// </summary>
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@ -26,11 +30,15 @@ internal sealed class LzwTiffCompression : TiffBaseDecompressor |
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/// <param name="colorType">The color type of the pixel data.</param>
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/// <param name="predictor">The tiff predictor used.</param>
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/// <param name="isBigEndian">if set to <c>true</c> decodes the pixel data as big endian, otherwise as little endian.</param>
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public LzwTiffCompression(MemoryAllocator memoryAllocator, int width, int bitsPerPixel, TiffColorType colorType, TiffPredictor predictor, bool isBigEndian) |
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/// <param name="isTiled">Flag indicates, if the image is a tiled image.</param>
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/// <param name="tileWidth">Number of pixels in a tile row.</param>
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public LzwTiffCompression(MemoryAllocator memoryAllocator, int width, int bitsPerPixel, TiffColorType colorType, TiffPredictor predictor, bool isBigEndian, bool isTiled, int tileWidth) |
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: base(memoryAllocator, width, bitsPerPixel, predictor) |
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{ |
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this.colorType = colorType; |
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this.isBigEndian = isBigEndian; |
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this.isTiled = isTiled; |
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this.tileWidth = tileWidth; |
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} |
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/// <inheritdoc/>
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@ -41,7 +49,15 @@ internal sealed class LzwTiffCompression : TiffBaseDecompressor |
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if (this.Predictor == TiffPredictor.Horizontal) |
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{ |
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HorizontalPredictor.Undo(buffer, this.Width, this.colorType, this.isBigEndian); |
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if (this.isTiled) |
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{ |
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// When the image is tiled, undoing the horizontal predictor will be done for each tile row.
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HorizontalPredictor.UndoTile(buffer, this.tileWidth, this.colorType, this.isBigEndian); |
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} |
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else |
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{ |
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HorizontalPredictor.Undo(buffer, this.Width, this.colorType, this.isBigEndian); |
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} |
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} |
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} |
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Brian Popow
12 months ago