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[Feat] (Diligent): wire CPU timer query fallback

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- Add steady_clock based BeginTimeElapsedQuery/EndTimeElapsedQuery/QueryCounterTimestamp
- Wire IsTimerQuerySupported/IsQueryResultAvailable/GetQueryResult64/DeleteBackendQuery
- Update handoff; 16 Diligent tests pass
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2026-08-23 10:15:19 +08:00
parent 071c8eb673
commit ca3b524396
2 changed files with 67 additions and 1 deletions
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HANDOFF_DILIGENT.md
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@@ -161,6 +161,7 @@ Verified locally on Turnip Adreno 750:
- `GenerateMipmap` (Diligent GPU mip generation on state textures)
- `GetTexImage` / `GetTextureImage` (RGBA8 readback)
- Fence sync entries (`FenceSync` / `ClientWaitSync` / `WaitSync` / `DeleteSync` / `GetSyncStatus`) as CPU always-signaled fallback
- Timer query entries (`BeginTimeElapsedQuery` / `EndTimeElapsedQuery` / `QueryCounterTimestamp` / `GetQueryResult64` etc.) as CPU `steady_clock` fallback
- `ReadPixels` from default and user color attachments
- Primitive expansion:
- `GL_TRIANGLE_FAN` expanded to triangle list
@@ -219,7 +220,7 @@ Notes:
- Textures auto-sync `ITextureObject` → Diligent resources, including mip levels and sampler state; compressed textures and integer/3-channel formats that Diligent lacks are still skipped.
- Global UBO (default-block `glUniform*`) and named application UBO blocks (through `glBindBufferBase`/`glUniformBlockBinding`) now upload and bind; SSBOs are still not fed from frontend buffer bindings.
- No swapchain / EGL window surface presentation yet; `Present()` only flushes.
- No transform feedback / GPU queries / non-color readback; fence sync is provided as a CPU always-signaled fallback.
- No transform feedback / GPU-accelerated queries / non-color readback; fence sync and timer queries use CPU fallbacks.
- Draw range, multi-draw, instanced-draw wrappers, clear-buffer, blit, read-pixels, CopyTexImage*, CopyImageSubData, GenerateMipmap, GetTexImage/GetTextureImage and indirect draws are now wired; buffer subdata paths still remain.
- A last-PSO cache now avoids recreating the pipeline when program/render-state/topology/VAO layout is unchanged; texture/UBO resources are still rebound dynamically per draw.
- The `GLFunctionsTable` is only partially populated.