Since the content of the canvas is inaccessible, it is important to ensure that the content can be explained in some way. To do this, we added a textual counterpart to every object drawn on the canvas.
The output contains a summary which is a gist of what is present in the canvas along with a table that contains details of objects. Both summary and table update in realtime with the sketch. NOTE: The output is currently visible - however this will not be the case in the IDE. This is just temporary for also testing without a screenreader.
The implementation to get the data for the p5 objects is done using an interceptor/monkey patch. The patch gets the arguments from the function call and store it in a variable. This content (summary and details) is refreshed every 100 frames - it contains the approximate location of the object along with its colour and other attributes.Source code