I've found an error, which might be some kind of overflow/underflow condition, so I think it should be fixed.
When opening a PNG file with 2 bits per pixel, there are a few pixels of wrong color at the and of the first line. In paletted pictures it's a color of palette index 0, in grayscale pictures it's black.
This problem occurs in 64 bit version in Windows 10 as well as 32 bit version in Windows XP.
I've attached an example file. The picture shows 4 red pixels in the top right corner when viewed in IrfanView. These pixels are not present in other programs. The file was created using PNGOUT.
Testing version IrfanView 4.54
When opening a PNG file with 2 bits per pixel, there are a few pixels of wrong color at the and of the first line. In paletted pictures it's a color of palette index 0, in grayscale pictures it's black.
This problem occurs in 64 bit version in Windows 10 as well as 32 bit version in Windows XP.
I've attached an example file. The picture shows 4 red pixels in the top right corner when viewed in IrfanView. These pixels are not present in other programs. The file was created using PNGOUT.
Testing version IrfanView 4.54
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