Andrey Petrov

Posts tagged with "GIF"

Another GIF Black Square?

Friday, 21. October 2005, 18:45:11

With new impessive

Opera 9 TP1 we also get new GIF transparency bug. See this test image in Opera 9 TP1 and any other browser including older Opera.
Also this test produce bug in Mac version of Opera 8 & 9 TP1 when you try to zoom (press [+] or [-] couple times).
I think this bug somehow connected with different bug which I named Malevich Black Square.

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Malevich Black Square in Opera

Wednesday, 14. September 2005, 01:50:10

zoom, print, Opera, bug ...

Today I want to present one of my favourite Opera bugs in fun way. And because I see this bug during around 3 years (since first Opera 7 beta appears) I want to give this beatiful bug his own name - Malevich Black Square bug.

So, first of all test page where we can see four Acid Smiles

Two of them (first and third) are images and other two are DIVs with image set as background.
Now funny part. Where Malevich Square here? Just change zoom on the page in your Opera browser or print out the page (needs Print Page Background option checked).
Last Acid Smile now will appears as black square!

I investigate this bug and found that it appears only if GIF image

has only black color and transparency
puts as background
need to be smaller than 64x64 px

Have fun!

Also read forum post about this bug.
Bug reports collection: #198211, #198161, #126808, and one more I filled myself long time ago but forgot the number...

Test suites: 1, 2, 3