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`quality` parameter is ignored in `Bitmap.Save` with `.jpg`

See original GitHub issue

Describe the bug The parameter does not appear to have any effect and no warning is reported.

To Reproduce Steps to reproduce the behavior:

Create a new Bitmap (I used WriteableBitmap) of ~1920x1080
Fill it with non-trivial data
Call bitmap.Save("test.jpg", quality: 10) (I also tried 1)

Expected behavior You get a low quality version of the bitmap weighting under 100KB

Actual behavior You get a high quality file over 1MB in size. It appears the resulting file is actually a PNG instead of JPEG.

Screenshots N/A

Desktop (please complete the following information):

OS: Windows
Version 11.0.2

Issue Analytics

State:
Created a month ago
Comments:5 (3 by maintainers)

Top GitHub Comments

1reaction

TETYYScommented, Aug 10, 2023

It appears the resulting file is actually a PNG instead of JPEG.

To be clear, check for file extension is not present here, it is always saved as PNG https://github.com/AvaloniaUI/Avalonia/blob/1896e8ad68dc0fdb6c1055d36a97b926e0a32f17/src/Skia/Avalonia.Skia/Helpers/ImageSavingHelper.cs#L57C51-L57C51

0reactions

lostmsucommented, Aug 10, 2023

I started working on support for image formats at least for saving. PR should be out in an hour or so.

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