[RedM] Game-view capture is never published on RDR3, so screenshot-basic always returns black #4349

What happened?

Summary

On RedM, NUI never receives the game frame. The game-view producer (CaptureBufferOutput(),
which publishes the CfxGameRenderHandle shared texture) exists only in rage-graphics-five.
rage-graphics-rdr3 has no equivalent, so BindGameRenderHandle() in nui-core always finds a
null handle and returns. Every screenshot-basic-style resource on RedM produces an all-black image.

Evidence

The attached probe resource does what screenshot-basic does, plus a control. It activates a WebGL
texture with both sequences, once on an empty texture and once on a texture pre-filled with a
magenta/green checker, then reads pixels back over 120 frames. If the checker survives, the client
never swapped in the game frame.

Same PC (AMD Radeon RX 9070 XT; NUI WebGL = ANGLE D3D11), same resource, player spawned in world:

WebGL1 and WebGL2 gave identical results in every case.

Source (at 9f0e34e)

• Producer, GTA V only: code/components/rage-graphics-five/src/GameViewCapture.cpp L452-585
  (CaptureBufferOutput), run from OnPostFrontendRender at L587-605.
• Consumer: code/components/nui-core/src/NUIInitialize.cpp glTexParameterfHook L303-372.
  The legacy sequence is compiled only #if GTA_FIVE; the 0x47d87380 path is compiled for all
  games. Both call BindGameRenderHandle(), which returns when the share handle is null (L249-253).
• git grep CfxGameRenderHandle matches only rage-graphics-five (producer), nui-core (consumer)
  and fxdk-main. Nothing in rage-graphics-rdr3 publishes it.

Expected result

The game frame reaches NUI on RedM the same way it does on FiveM, so screenshot-basic returns the actual game image.

Reproduction steps

Repro

1. Add the attached bsd_capturetest to a RedM and a FiveM server, with ensure bsd_capturetest
   and set bsd_capturetest_public true (lets the server save reports).
2. Join, spawn in with the world visible, and run capturetest 120 <label> in F8.
3. Results print in F8; a JSON report (with a thumbnail when pixels arrive) is saved under
   the resource's reports/ folder.

Importancy

Slight inconvenience

Area(s)

RedM

Specific version(s)

RedM client: production channel (updated 2026-11-04). FiveM client for comparison: production, game build 3258. Servers: RedM 38317 linux, FiveM 35245 linux. Source refs at commit 9f0e34e.

Additional information

Notes for a fix

• RedM forces the D3D12 sga driver unless -sgadriver is given (GfxSpec.cpp L805-806); NUI's
  WebGL runs on ANGLE/D3D11.
• WrapEndDraw in GfxSpec.cpp (L506-522) already fetches the swapchain backbuffer every frame,
  which looks like a natural point to copy it into a shareable texture.
• RDR3 already shares textures NUI → game on both D3D12 and Vulkan (GtaNui.cpp around L916-973,
  vk::CreateImageFromShareHandle). A game-view producer is the same plumbing in reverse.
• On non-GTA_FIVE builds, NUI's shared textures use NT handles (NUIInitialize.cpp L727-744,
  L772-785), while BindGameRenderHandle uses EGL_D3D_TEXTURE_2D_SHARE_HANDLE_ANGLE. The consumer
  may need adjusting if the producer exports an NT handle.
• Side observation: on 2026-11-03 Chromium's WebGL validation rejected 0x47d87380 with
  INVALID_ENUM on both games; on 2026-11-04 FiveM accepted it. The WebGL renderer string also
  changed between runs, so the client likely updated.