Share retained framebuffer dispatch bridge

docs/modernization/roadmap.md

@@ -1152,7 +1152,10 @@ render-target texture parameters and parameter dispatch, texture/renderbuffer
 targets, depth format, framebuffer targets, binding queries, attachment points,
 render-target framebuffer allocation/delete, binding restore, and completion
 status used by `RTT::create`/`RTT::destroy` and framebuffer bind/restore paths,
-also live in `pp_renderer_gl`. Depth renderbuffer allocation/storage/delete and
+also live in `pp_renderer_gl`; retained `Texture2D` readback and RTT
+framebuffer allocation, deletion, bind/restore, blit, readback, and PBO
+readback dispatch now share the retained `legacy_gl_framebuffer_dispatch` raw
+callback bridge. Depth renderbuffer allocation/storage/delete and
 framebuffer depth attach/detach sequences used by retained `RTT` and canvas
 object-drawing helpers now execute through tested `pp_renderer_gl` dispatch
 contracts and share the retained `legacy_gl_renderbuffer_dispatch` raw callback
@@ -2555,6 +2558,11 @@ Results:
   `legacy_gl_texture_dispatch`, removing duplicated raw texture callbacks from
   `src/texture.cpp` and `src/rtt.cpp` while texture resource ownership remains
   retained under DEBT-0036.
+- Retained `Texture2D` readback plus RTT framebuffer allocation, deletion,
+  bind/restore, blit, readback, and PBO readback dispatch now share
+  `legacy_gl_framebuffer_dispatch`, removing duplicated raw framebuffer and
+  readback callbacks from `src/texture.cpp` and `src/rtt.cpp` while
+  framebuffer/readback ownership remains retained under DEBT-0036.
 - Canvas draw-merge shader-blend selection now consumes the extracted
   `pp_paint_renderer` stroke composite planner for current layer and primary
   brush blend modes, while preserving legacy OpenGL compositing execution under