"ArgumentOutOfRangeException: Specified argument was out of the range of valid values" when trying to quantize image from MemoryStream with transparent pixels.

Prerequisites

I have written a descriptive issue title
I have verified that I am running the latest version of ImageSharp
I have verified if the problem exist in both DEBUG and RELEASE mode
I have searched open and closed issues to ensure it has not already been reported

Description

When I trying to quantize image from MemoryStream (which filled from System.Drawing.Bitmap), this exception throws:

ArgumentOutOfRangeException: Specified argument was out of the range of valid values.

   at System.ThrowHelper.ThrowArgumentOutOfRangeException()
   at SixLabors.ImageSharp.Processing.Processors.Quantization.OctreeQuantizer`1.AddPaletteColors(Buffer2DRegion`1 pixelRegion)
   at SixLabors.ImageSharp.Processing.Processors.Quantization.QuantizerUtilities.BuildPaletteAndQuantizeFrame[TPixel](IQuantizer`1 quantizer, ImageFrame`1 source, Rectangle bounds)
   at SixLabors.ImageSharp.Processing.Processors.Quantization.QuantizeProcessor`1.OnFrameApply(ImageFrame`1 source)
   at SixLabors.ImageSharp.Processing.Processors.ImageProcessor`1.Apply(ImageFrame`1 source)

Steps to Reproduce

Load image from MemoryStream, filled from this Bitmap (img.PixelFormat is PixelFormat.Format32bppArgb):

SixLabors.ImageSharp.Image<SixLabors.ImageSharp.PixelFormats.Rgba32> imgIS;

using (MemoryStream memoryStream = new MemoryStream())
{
	img.Save(memoryStream, ImageFormat.Png);

	memoryStream.Seek(0, SeekOrigin.Begin);

	imgIS = SixLabors.ImageSharp.Image.Load<SixLabors.ImageSharp.PixelFormats.Rgba32>(memoryStream, new SixLabors.ImageSharp.Formats.Png.PngDecoder());
}

Quantize it.

SixLabors.ImageSharp.Processing.Processors.Quantization.IQuantizer quantizer = new SixLabors.ImageSharp.Processing.Processors.Quantization.OctreeQuantizer(new SixLabors.ImageSharp.Processing.Processors.Quantization.QuantizerOptions { MaxColors = 81 });
imgIS.Mutate(x => x.Quantize(quantizer));

One detail: I am using ImageSharp without using SixLabors.ImageSharp;, only using SixLabors.ImageSharp.Processing;

System Configuration

SixLabors.ImageSharp version - 1.0.2:
Environment: Windows 7 Ultimate SP1 x64.
.NET Framework version: 4.8.03761; .NET version - 5.0.101 (project uses .NET 5.0).
Additional information: Microsoft Visual Studio Community 2019, version 16.8.3.

Update: similar exception thrown on "Desert.jpg" from standard Windows 7 "Sample pictures" folder, even if I load an image like that:

SixLabors.ImageSharp.Image<SixLabors.ImageSharp.PixelFormats.Rgba32> imgIS = SixLabors.ImageSharp.Image.Load<SixLabors.ImageSharp.PixelFormats.Rgba32>(fileName);

Exception stack trace:

ArgumentOutOfRangeException: Specified argument was out of the range of valid values.

   at SixLabors.ImageSharp.Processing.Processors.ImageProcessor`1.Apply(ImageFrame`1 source)
   at SixLabors.ImageSharp.Processing.Processors.ImageProcessor`1.SixLabors.ImageSharp.Processing.Processors.IImageProcessor<TPixel>.Execute()

After disabling "Just my code", I found exact source of exception:
ReadOnlyMemory<TPixel> val2 = System.Memory<TPixel>.op_Implicit(paletteOwner.get_Memory().Slice(0, Math.Min(paletteIndex + 2, 256));
in AddPaletteColors(Buffer2DRegion`1 pixelRegion) method.

paletteIndex = 80, maxColors = 81 .

@VladiStep

I think this issue is the same as #1505. It was fixed with #1506.

@VladiStep could you try our latest version of ImageSharp from the MyGet Feed and test if the issue is still there or fixed?

@VladiStep

I think this issue is the same as #1505. It was fixed with #1506.

@VladiStep could you try our latest version of ImageSharp from the MyGet Feed and test if the issue is still there or fixed?

Yes, that version is fixed it.

@VladiStep

@VladiStep Thanks for providing so much information to let us triage this issue. We really appreciate it!

Fiddeling with Image Sharp behavior

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"ArgumentOutOfRangeException: Specified argument was out of the range of valid values" when trying to quantize image from MemoryStream with transparent pixels. #1497

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"ArgumentOutOfRangeException: Specified argument was out of the range of valid values" when trying to quantize image from MemoryStream with transparent pixels. #1497

Description

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Description

Steps to Reproduce

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Activity

VladiStep commented on Jan 10, 2021

VladiStep commented on Jan 17, 2021

brianpopow commented on Jan 19, 2021

VladiStep commented on Jan 20, 2021

JimBobSquarePants commented on Jan 20, 2021

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