The open source OpenXR runtime

doc: Document !1980

+7
+1
doc/changes/compositor/mr.1980.1.md
··· 1 + render: Refactor gfx mesh shader allocation and dispatch.
+3
doc/changes/compositor/mr.1980.2.md
··· 1 + render: Remove unused render_gfx_view and other fields on render_gfx, 2 + the limiting factor to how many views the graphics path can do now is the sizes 3 + of descriptor pools and UBO buffer.
+3
doc/changes/compositor/mr.1980.3.md
··· 1 + render: Refactor gfx descriptor pool, descriptor layout creation function, 2 + ubo upload ad descriptor updating function to be shareable. The common pattern 3 + is one UBO and one source image, so make it possible to share these.