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How to change the opacity (alpha, transparency) of an element in a canvas element after it has been

Using the HTML5 <canvas> element, I would like to load an image file (PNG, JPEG, etc.), draw it to the canvas completely transparently, and then fade it in. I have figured out how to load the image and draw it to the canvas, but I don't know how to change its opacity once it as been drawn. ...
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What can you do in MSIL that you cannot do in C# or VB.NET? [closed]

... Anton GogolevAnton Gogolev 105k3636 gold badges187187 silver badges274274 bronze badges ...
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How to import a .cer certificate into a java keystore?

... | edited Feb 25 '19 at 21:40 Lior Bar-On 6,81411 gold badge2727 silver badges4040 bronze badges ...
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jQuery's jquery-1.10.2.min.map is triggering a 404 (Not Found)

... Paul IrishPaul Irish 41.5k2020 gold badges9090 silver badges124124 bronze badges ...
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PHP Pass variable to next page

... 456 HTML / HTTP is stateless, in other words, what you did / saw on the previous page, is completel...
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Regexp Java for password validation

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Why should casting be avoided? [closed]

...arn you about those potential problems. Just for example, char a=(char)123456;. The exact result of this implementation defined (depends on the size and signedness of char), and except in rather strange situations, probably isn't useful. C casts also vary in whether they're something that happens on...
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Swift compiler error: “non-modular header inside framework module”

... answered Jun 19 '14 at 22:50 kgreenekkgreenek 4,77822 gold badges1515 silver badges2929 bronze badges ...
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Officially, what is typename for?

... NAND 63755 silver badges2121 bronze badges answered Oct 21 '09 at 13:51 NaveenNaveen 6...
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TypeError: 'NoneType' object is not iterable in Python

... answered Oct 8 '10 at 2:57 vanzavanza 8,21311 gold badge2727 silver badges3333 bronze badges ...