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Salary
$250-750
Location
New York City, NY, United States
Posted on
Jun 06, 2020
Profile
Android Drawing Component, low latency (Native? OpenGL? not sure)
Im working on developing an Android drawing low latency app. Canvas is obviously too slow for this. This is for a small personal project of mine. Im a developer but not an Android developer, so Id like this component in a state that I can tinker with.
Here are the main features. If you can still do a good subset of these, let me know!
* Low latency rendering is the most important thing. There should be no (or little) space between the pointer on the screen and the brush stroke. I suspect theres a way of having a small Layer (Surface) at the tip of the pointer, while actually committing the brush to the main image in a different thread. I assume it could also be a native component or an OpenGL component. Maybe some clever buffer tricks. Up to you.
* it should support different brush types (pencil, pen, etc), with characteristics like thickness transparency etc. By support I mean something that can be added later, you dont have to implement these. Ideally if I can have access to the raw pixels Ill figure out how the brushes would work later and I can tinker with it. If you know how to simulate these brushes, all the better.
* Should run on Android 5.0 . Bonus points for ChromeOS (I understand they have some other APIs that can be used). Let me know if theres a reason the SDK version should be different.
* Should have Undo/Redo history, without killing the memory. This would work with zipping the image delta between 2 brushstrokes. Or if it works fast enough, replaying the history.
* Should have the possibility to zoom in/out and pan.
* Should be possible to instantiate multiple of these components in the same app.
* Should work with an active stylus. I assume this is trivial.
* Should support multiple layers
* Should support being resized
* Should be in Java. Im not familiar with Kotlin. C /Native also works.
* There should be a way to access the pixels to do simple operations (like set background, paste an image) even if its in a slow way.
The deliverable should be an app with this component, minimal UI, minimal brushes (transparent black circle could do the trick).
Looking forward to your questions and proposals.
Skills:
Android
, Mobile App Development
, Java
, C Programming
, OpenGL
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