Unlike the OP's file, there's a rather substantial test suite and massive corpus of TypeScript code to work with, so at the very least, you'd have some grumpy people knocking on your door if you did something that negatively impacted the greater ecosystem.
Some documentation from Orta Therox on the checker:
There's more detail in the iPhone battery information page.
Testing conducted by Apple in August 2021 using preproduction iPhone 13 mini, iPhone 13, iPhone 13 Pro, and iPhone 13 Pro Max units and software, subscribed to LTE and 5G carrier networks. Video playback consisted of a repeated 2-hour 23-minute movie purchased from the iTunes Store, tested with stereo audio output. Video playback (streamed) consisted of a repeated 3-hour 1-minute HDR movie purchased from the iTunes Store, tested with stereo audio output. All settings were default except: Bluetooth was paired with headphones; Wi-Fi was associated with a network; the Wi-Fi feature Ask to Join Networks, Auto-Brightness, and True Tone were turned off.
No, you're right, there's no quad reconstruction. I imagine you could have just used quads in both the WebGL and Canvas renderers to achieve a similar effect.
Wouldn't it be more likely for the reverse to hold true? The razor-and-blades business model doesn't exactly apply here given the low level of technical sophistication required to print the calibration stickers. Constructing inkjet cartridges and machining modern razor blades are far more complex feats of engineering.
As the paper describes, the stickers can be applied "in any pattern so long as some tape is visible from every position that the device will move to". Thus, there is no need to align the stickers in a special pattern beforehand.
Anyone should be able to print similar calibration stickers on their own dime.
https://www.pcgamer.com/ex-valve-employee-describes-ruthless...