Render: Push Constants instead of Global SSBO

[eprikazchikov]

Is your feature request related to a problem? Please describe.

For the performance purposes it's better to use Push Constants for Projection and View Matrices instead of Global SSBO.

Current structure of Global buffer is quite big for Push constants which can be limited to 128 bytes (only one mat4).
This means we need to think how to reduce Global structure (probably some data can be moved to Local structure in case of it will be used only in specific shader domains)

[eprikazchikov]

Seems like Push Constant is senseless for Global buffer in Gbuffer and Differed Light passes because it's not updating so frequently. But can be used in another domains like Shadow Map or Gizmos rendering tasks.