Tracker: v6.0 Attribute Handling Refactor Follow-up

[ibgreen]

Background

Tracker issue for various additional work stemming from the changes and refactors in v6.0. The various tasks are expected to be spread out across 6.x releases.

Optimize Uniform Settings

• [ ] Program: Create separate function to bind texture units. Call before each draw call (possibly optionally).
• [x] Program: Stop setting all uniforms before each draw call.
• [x] Program: Restore & improve uniform diffing to avoid resetting uniforms.
• [ ] Program: Investigate letting app specify texture units for textures. And set texture units directly. To make luma cover intended use of texture units.

UniformBlock support

• [ ] Program: Handle uniform block indices like texture units described above.
• [ ] ProgramConfiguration: Add support for uniform blocks

VertexArray

• [x] VertexArray: Add option to "unbind" to avoid conflicts with TransformFeedback.
• [x] VertexArray: Investigate using "only bind during use" to cover WebGL1 instead of Khronos polyfill? to save on bundle size and complexity

To Do List

• [ ] Add label and assign to milestone
• [ ] Coding
• [ ] Doc update
• [ ] Whats new update
• [ ] Test

[tsherif]

@ibgreen is this still relevant?

[ibgreen]

It could be worth going through this together, and then you can make the decision.