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ios - Capture image via captureStillImageAsynchronouslyFromConnection with no shutter sound - Stack Overflow

2014 May 24, 2:42

The best hack I’ve seen in a while. With no way to disable the shutter sound from the capture photo API, the developer creates the inverse waveform of the shutter sound and plays it at the same time to cancel out the shutter sound.

PermalinkCommentstechnical humor ios photo sound

Cloud Share - New App

2014 May 23, 4:06

I've put a new app on the Windows Store: Cloud Share. It connects the web to your Windows 8 share charm.

I did the development on GitHub and quite enjoyed myself. I wasn't sure I liked the game-ification of development in GitHub's dashboard showing you your longest development streak in days. However I realized that it encourages me to do work on my personal project and anything that aids in holding my attention on and helping me finish these projects is a good thing.

PermalinkCommentsdevelopment github javascript JS technical windows

Debugging anecdote - the color transparent black breaks accessibility

2014 May 22, 10:36

Some time back while I was working on getting the Javascript Windows Store app platform running on Windows Phone (now available on the last Windows Phone release!) I had an interesting bug that in retrospect is amusing.

I had just finished a work item to get accessibility working for JS WinPhone apps when I got a new bug: With some set of JS apps, accessibility appeared to be totally broken. At that time in development the only mechanism we had to test accessibility was a test tool that runs on the PC, connects to the phone, and dumps out the accessibility tree of whatever app is running on the phone. In this bug, the tool would spin for a while and then timeout with an error and no accessibility information.

My first thought was this was an issue in my new accessibility code. However, debugging with breakpoints on my code I could see none of my code was run nor the code that should call it. The code that called that code was a more generic messaging system that hit my breakpoints constantly.

Rather than trying to work backward from the failure point, I decided to try and narrow down the repro and work forwards from there. One thing all the apps with the bug had in common was their usage of WinJS, but not all WinJS apps demonstrated the issue. Using a binary search approach on one such app I removed unrelated app code until all that was left was the app's usage of the WinJS AppBar and the bug still occurred. I replaced the WinJS AppBar usage with direct usage of the underlying AppBar WinRT APIs and continued.

Only some calls to the AppBar WinRT object produced the issue:

        var appBar = Windows.UI.WebUI.Core.WebUICommandBar.getForCurrentView(); 
// appBar.opacity = 1;
// appBar.closeDisplayMode = Windows.UI.WebUI.Core.WebUICommandBarClosedDisplayMode.default;
appBar.backgroundColor = Windows.UI.Colors.white; // Bug!
Just setting the background color appeared to cause the issue and I didn't even have to display the AppBar. Through additional trial and error I was blown away to discover that some colors I would set caused the issue and other colors did not. Black wouldn't cause the issue but transparent black would. So would aqua but not white.

I eventually realized that predefined WinRT color values like Windows.UI.Colors.aqua would cause the issue while JS literal based colors didn't cause the issue (Windows.UI.Color is a WinRT struct which projects in JS as a JS literal object with the struct members as JS object properties so its easy to write something like {r: 0, g: 0, b: 0, a: 0} to make a color) and I had been mixing both in my tests without realizing there would be a difference. I debugged into the backgroundColor property setter that consumed the WinRT color struct to see what was different between Windows.UI.Colors.black and {a: 1, r: 0, g: 0, b: 0} and found the two structs to be byte wise exactly the same.

On a hunch I tried my test app with only a reference to the color and otherwise no interaction with the AppBar and not doing anything with the actual reference to the color: Windows.UI.Colors.black;. This too caused the issue. I knew that the implementation for these WinRT const values live in a DLL and guessed that something in the code to create these predefined colors was causing the issue. I debugged in and no luck. Now I also have experienced crusty code that would do exciting things in its DllMain, the function that's called when a DLL is loaded into the process so I tried modifying my C++ code to simply LoadLibrary the DLL containing the WinRT color definition, windows.ui.xaml.dll and found the bug still occurred! A short lived moment of relief as the world seemed to make sense again.

Debugging into DllMain nothing interesting happened. There were interesting calls in there to be sure, but all of them behind conditions that were false. I was again stumped. On another hunch I tried renaming the DLL and only LoadLibrary'ing it and the bug went away. I took a different DLL renamed it windows.ui.xaml.dll and tried LoadLibrary'ing that and the bug came back. Just the name of the DLL was causing the issue.

I searched for the DLL name in our source code index and found hits in the accessibility tool. Grinning I opened the source to find that the accessibility tool's phone side service was trying to determine if a process belonged to a XAML app or not because XAML apps had a different accessibility contract. It did this by checking to see if windows.ui.xaml.dll was loaded in the target process.

At this point I got to fix my main issue and open several new bugs for the variety of problems I had just run into. This is a how to on writing software that is difficult to debug.

PermalinkCommentsbug debug javascript JS technical windows winrt

location.hash and location.search are bad and they should feel bad

2014 May 22, 9:25
The DOM location interface exposes the HTML document's URI parsed into its properties. However, it is ancient and has problems that bug me but otherwise rarely show up in the real world. Complaining about mostly theoretical issues is why blogging exists, so here goes:
  • The location object's search, hash, and protocol properties are all misnomers that lead to confusion about the correct terms:
    • The 'search' property returns the URI's query property. The query property isn't limited to containing search terms.
    • The 'hash' property returns the URI's fragment property. This one is just named after its delimiter. It should be called the fragment.
    • The 'protocol' property returns the URI's scheme property. A URI's scheme isn't necessarily a protocol. The http URI scheme of course uses the HTTP protocol, but the https URI scheme is the HTTP protocol over SSL/TLS - there is no HTTPS protocol. Similarly for something like mailto - there is no mailto wire protocol.
  • The 'hash' and 'search' location properties both return null in the case that their corresponding URI property doesn't exist or if its the empty string. A URI with no query property and a URI with an empty string query property that are otherwise the same, are not equal URIs and are allowed by HTTP to return different content. Similarly for the fragment. Unless the specific URI scheme defines otherwise, an empty query or hash isn't the same as no query or hash.
But like complaining about the number of minutes in an hour none of this can ever change without huge compat issues on the web. Accordingly I can only give my thanks to Anne van Kesteren and the awesome work on the URL standard moving towards a more sane (but still working practically within the constraints of compat) location object and URI parsing in the browser.
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A Complete Guide to Flexbox | CSS-Tricks

2014 May 22, 1:02

"The Flexbox Layout (Flexible Box) module (currently a W3C Candidate Recommendation) aims at providing a more efficient way to lay out, align and…"

Great diagrams showing the use of the various flex css properties. I can never keep them straight so this is perfect for me.

PermalinkCommentstechnical css flex

YouTube - June System Update Walkthrough for Xbox One OneGuide...

2014 May 21, 6:15


YouTube - June System Update Walkthrough for Xbox One

OneGuide on SmartGlass is coming in the June Xbox One update! The feature I’ve been missing since day one. I don’t think I’m an average Xbox One user.

PermalinkCommentsxbox video tv

CodePlex - Virtual Router - Wifi Hot Spot for Windows 8, Windows 7 and 2008 R2

2014 May 21, 2:30

The original open source Wifi Hotpot for Windows 7, Windows 8 and Windows Server 2012!

Free open source software based router you can run on Windows to wirelessly share your Internet connection with other devices

PermalinkCommentstechnical tool wifi router free open-source windows

Guardian - Secrets, lies and Snowden’s email: why I was...

2014 May 21, 2:11


Guardian - Secrets, lies and Snowden’s email: why I was forced to shut down Lavabit

"For the first time, the founder of an encrypted email startup that was supposed to insure privacy for all reveals how the FBI and the US legal system made sure we don’t have the right to much privacy in the first place"

PermalinkCommentslaw legal encryption technical

Very Serious Button

2014 May 17, 1:34

A physical big red button that is a USB keyboard with a configurable single key. This looks wonderful. I’ll take 26.

RT @codinghorror The Very Serious USB Button https://www.indiegogo.com/projects/very-serious-button/

PermalinkCommentshumor hardward big-red-button

The Doritos origin story: Repurposed garbage from Disneyland

2014 May 6, 7:16

shortformblog:

A reminder that those Doritos you love are trash:

Shortly after Disneyland opened in 1955, the founder of Frito-Lay got permission from Walt Disney to open a restaurant in Frontierland with a Mexican-ish theme. “Casa de Fritos” was, unsurprisingly, all about the Fritos. Customers got free Fritos, and Fritos were incorporated into many of the dishes. Fritos were dispensed by an animatronic vending machine that featured the terrifying “Frito Kid”asking his assistant “Klondike” to bring the bag up from a mineshaft. I guess the conceit is that Fritos were mined by Forty-Niners?

Casa de Fritos contracted their tortilla production to a company called Alex Foods. One of the salesmen from Alex Foods, making a delivery to Casa de Fritos, noticed stale tortillas in the garbage and gave the cook a little tip: fry them and sell them as chips instead of throwing them away. Casa de Fritos began making these fried, seasoned chips to enormous success, but didn’t report this new menu item to the Frito-Lay company.

Eventually Frito-Lay found out what they were doing with the chips, packaged them, and sold them by the truckload. See, dumpster diving works out sometimes!

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Internet Archive lets you play one of the earliest computer...

2014 Apr 28, 9:39


Internet Archive lets you play one of the earliest computer games Space War! emulated in JavaScript in the browser.

This entry covers the historical context of Space War!, and instructions for working with our in-browser emulator. The system doesn’t require installed plugins (although a more powerful machine and recent browser version is suggested).

The JSMESS emulator (a conversion of the larger MESS project) also contains a real-time portrayal of the lights and switches of a Digital PDP-1, as well as links to documentation and manuals for this $800,000 (2014 dollars) minicomputer.

PermalinkCommentscomputer-game game video-game history internet-archive

FCC planning new Internet rules that will gut Net Neutrality. Get ready to pay more for the stuff you love online.

2014 Apr 24, 3:29
PermalinkCommentstechnical net-neutrality fcc bullshit

A Fascinating Look At The World's Best Super Smash Bros. Players

2014 Apr 21, 10:23
PermalinkCommentsvideo-game video nintendo documentary

(via...

2014 Apr 15, 1:30


(via http://www.youtube.com/attribution_link?a=-PW2Y0XIDbE&u=/watch?v=XG8qATRtNuU&feature=share)

PermalinkCommentsfilm movie trailer

Results of the Grand C++ Error Explosion Competition

2014 Jan 28, 4:58

tgceec:

After much deliberation, the winners of the Grand C++ Error Explosion Competition are finally selected. There are two different award categories. The winners of the first category are those submissions that produced the largest error with the smallest amount of source code. These entries contain a…

PermalinkCommentshumor technical c++ programming coding

harmony:generators [ES Wiki]

2013 Dec 17, 9:01

Adds the yield keyword enabling you to write JS code that sort of looks like C# await.

Overview

First-class coroutines, represented as objects encapsulating suspended execution contexts (i.e., function activations). Prior art: Python, Icon, Lua, Scheme, Smalltalk.

PermalinkCommentstechnical javascript

laughingsquid: I Want to Believe in RSS T-Shirt

2013 Oct 15, 9:44


laughingsquid:

I Want to Believe in RSS T-Shirt

PermalinkCommentstechnical humor rss shirt gift

CM Punk’s Grammar Slam - Literally vs. Figuratively (by...

2013 Aug 30, 8:00


CM Punk’s Grammar Slam - Literally vs. Figuratively (by Nerdist). This is literally very funny.

PermalinkCommentsliterally grammar humor video

Phone Buttons - Numberphile (by numberphile)

2013 Aug 30, 5:47


Phone Buttons - Numberphile (by numberphile)

PermalinkCommentsHistory numbers phone

FitBit and WebOC Application Compatibility Errors

2013 Aug 29, 7:17
I just got a FitBit One from my wife. Unfortunately I had issues running their app on my Windows 8.1 Preview machine. But I recognized the errors as IE compatibility issues, for instance an IE dialog popup from the FitBit app telling me about an error in the app's JavaScript. Given my previous post on WebOC versioning you may guess what I tried next. I went into the registry and tried out different browser mode and document mode versions until I got the FitBit software running without error. Ultimately I found the following registry value to work well ('FitBit connect.exe' set to DWORD decimal 8888).
Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Main\FeatureControl\FEATURE_BROWSER_EMULATION]
"Fitbit Connect.exe"=dword:000022b8

For those familiar with the Windows registry the above should be enough. For those not familiar, copy and paste the above into notepad, save as a file named "fitbit.reg", and then double click the reg file and say 'Yes' to the prompt. Hopefully in the final release of Windows 8.1 this won't be an issue.
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