Add a new renderer API

Goals:

- Extensibility: we need to be able to add new params to the calls
  to render a texture/rect. For instance we'll need to add fences to
  the render texture operation for explicit sync purposes.
- No implicit state: no more bind_buffer, begin, end.
- No matrices: these hurt Pixman and we don't need them.
- Clip regions for optimized damage repainting.

Closes: https://gitlab.freedesktop.org/wlroots/wlroots/-/issues/3188

render/meson.build

@@ -8,6 +8,7 @@ endif
 wlr_files += files(
 	'dmabuf.c',
 	'drm_format_set.c',
+	'pass.c',
 	'pixel_format.c',
 	'swapchain.c',
 	'wlr_renderer.c',