Move sampler parameter mapping to renderer gl

docs/modernization/roadmap.md

@@ -396,7 +396,9 @@ decisions used by legacy `Shape` drawing and the PanoPainter cube-face to
 OpenGL texture-target mapping used by `TextureCube` also live in
 `pp_renderer_gl`. The legacy app delegates extension, upload-format,
 framebuffer diagnostic, render-target texture parameter, mesh draw-mode, and
-cube-face texture-target interpretation to that backend library. The PanoPainter shader attribute
+cube-face texture-target interpretation to that backend library. Sampler wrap
+and min/mag filter parameter mapping for legacy `Sampler` also lives in
+`pp_renderer_gl`. The PanoPainter shader attribute
 binding catalog also lives in `pp_renderer_gl` and is consumed by legacy
 `Shader` creation. Shader uniform hashing, catalog validation, active-uniform
 mapping, and the legacy uniform uniqueness check now delegate to
@@ -645,6 +647,8 @@ Results:
   framebuffer status names, plus Shape index-type and fill/stroke primitive
   mode mapping, PanoPainter cube-face texture-target order, and the linear
   clamp-to-edge render-target texture parameter set used by `RTT::create`.
+  Sampler parameter validation covers wrap S/T/R plus min/mag filter ordering
+  used by legacy `Sampler::set` and `Sampler::set_filter`.
   Shader attribute binding catalog validation covers the current `pos`, `uvs`,
   `uvs2`, `col`, and `nor` bindings and rejects empty, unnamed, null-name, and
   duplicate-name catalogs while preserving legacy shared locations. Shader