Auto Resource Optimizations

[vanruesc]

Description

Related: #377

Implement automatic resource optimizations for render targets and textures.

Tasks

• Manage WebGLRenderTarget and Texture instances via Resource wrappers.
• Implement reactive, event-based I/O.
• Implement disposable resources.
• Implement override values for resources.
• Analyze passes and effects on I/O changes to deduplicate render targets and textures.
• Make sure this doesn't break anything by adding tests 💥