Frame readback (saveFramePng/getPixel) previously crashed the WASM runtime
when called from the playground bridge: emscripten_sleep inside a deep
JS->Squirrel->Graphics call chain breaks ASYNCIFY (rewind hits 'unreachable').
- add async two-phase readback to the webgpu backend (beginFrameReadback /
frameReadbackStatus, pumped from present() so the map callback is delivered
on the browser event loop without sleeping)
- bridge: eve_playground_capture / eve_playground_readback_status /
eve_playground_read_bytes (binary-safe VFS read)
- playground: 截图 button captures the current frame and previews the PNG
- bump ASYNCIFY_STACK_SIZE and TOTAL_STACK (1 MiB) for deep native chains
- export HEAPU8 for binary reads from the page
Adds a self-contained browser playground (editor + canvas + console + REPL)
around the Emscripten WebGPU build, plus the engine fixes required to render:
- JS<->Squirrel bridge (apply/eval/read/pause) and Emscripten 6 exports
- soft hot-reload via load.nut handle_change with __pg state preservation
- fix Uint16 index buffer byte sizes in SetIndexBuffer calls
- fix dangling GbufferSlot/SceneColorSlot gpuHandle pointers (std::move bug)
- fallback shadow depth texture when no shadow map is configured
- fix WGSL syntax (mod/ivec2) and default shadow sampler maxAnisotropy
- serve_webgpu.py COOP/COEP server and playground docs/demos/assets
- Link eve to eve.html via --shell-file so the shell template is actually applied and regenerated on every build; track the shell as a link dependency.
- Keep C++ exception catching enabled under ASYNCIFY so expose() failures abort cleanly instead of asserting on __cxa_throw.
- ModuleManager::exposeVM no longer find()+catch for the eve table: Runtime::initialize() guarantees expose() runs once, and ASYNCIFY-wrapped frames can drop the catch and leak NotFoundException.
- Expose window.hideEVELoading and call it on the first presented frame so the shell's loading overlay is dismissed.
- FileWatch.h includes common/config.h so EVENGINE_WEBGPU is defined before the Poco guard.
- Added support for the WebGPU backend in the CMake configuration, enabling builds for Emscripten and native Dawn.
- Implemented conditional compilation for WebGPU-specific features, including shader management and file system handling.
- Updated the build process to exclude unnecessary modules and dependencies for WebGPU, optimizing the engine for browser environments.
- Enhanced the installation script to include WebGPU-related files and directories in the output.
- Refactored existing modules to accommodate WebGPU, ensuring compatibility and performance improvements across the engine.
- Introduced new compile options and configurations tailored for WebGPU builds, including handling of third-party libraries and assets.
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