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[Feat] (Diligent): support multiple simultaneous color attachments

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- PSO RTV count/formats now derive from the bound draw FBO color attachments
- Include RT layout in the last-PSO cache key
- Add DrawsToMultipleColorAttachmentsFromMobileGLState; 15 Diligent tests pass
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2026-08-23 09:56:58 +08:00
parent 20567fba6d
commit eb8ef893be
3 changed files with 132 additions and 5 deletions
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HANDOFF_DILIGENT.md
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@@ -107,6 +107,7 @@ Working tree is clean.
- `DrawsNamedUniformBlockFromMobileGLState`
- `DrawsWithStencilTestFromMobileGLState`
- `DrawsToRenderbufferFramebufferFromMobileGLState`
- `DrawsToMultipleColorAttachmentsFromMobileGLState`
---
@@ -162,7 +163,7 @@ Verified locally on Turnip Adreno 750:
- Local test result:
```
[ PASSED ] 14 tests
[ PASSED ] 15 tests
```
---
@@ -209,7 +210,7 @@ Notes:
## 7. Known Limitations / Not Yet Implemented
- User framebuffers now support texture color attachments, renderbuffer color readback, and depth/stencil texture or renderbuffer attachments; multi-target color attachments remain partial.
- User framebuffers now support texture color attachments, renderbuffer color readback, multiple simultaneous color targets, and depth/stencil texture or renderbuffer attachments.
- 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.
@@ -226,7 +227,7 @@ Notes:
- [x] Map `MG_State::GLState::FramebufferObject` attachments to Diligent `ITextureView` / `ITexture`.
- [x] Support default framebuffer as current offscreen target.
- [x] Support `glBindFramebuffer`, `glFramebufferTexture2D`, renderbuffer color/depth attachments and renderbuffer color readback.
- [ ] Multiple simultaneous color attachments (currently single RT resolution).
- [x] Multiple simultaneous color attachments.
2. **Texture / Sampler full integration**
- [x] Translate MobileGL `ITextureObject` to Diligent `ITexture` and cache by `GetLifetimeId()`.