mirror of
https://github.com/IfcOpenShell/IfcOpenShell.git
synced 2026-08-30 16:43:00 +00:00
Dion Moult
1fc15e78f2
Replaces the standalone wgpu-only clear-color spike in main_web.cpp with a real WebViewportHost implementation: surface creation via the emdawnwebgpu canvas-selector source, framebufferSize through emscripten_get_element_css_size + dpr, requestFrame as a deferred flag the RAF main_loop consumes, quit through emscripten_force_exit. main_web.cpp now does the same lifecycle the desktop initWgpu shell does: core_.initWgpu(web_limits=true) → buildPipelines → buildHiz/ Edge/Pick. The render loop runs core_.render() once per RAF tick when the host has flagged a frame pending, with a surface reconfigure on size changes. Builds clean under emcc 6.0 + emdawnwebgpu (1.4 MB wasm, 278 KB JS glue). Renders an empty scene with the configured background — the plumbing is end-to-end through the same ViewportCore code path the desktop build uses. No sidecar load yet: that lands with the emscripten_fetch streaming backend (#88).
103 lines
5.0 KiB
CMake
103 lines
5.0 KiB
CMake
################################################################################
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# #
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# This file is part of IfcOpenShell. #
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# #
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# IfcOpenShell is free software: you can redistribute it and/or modify #
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# it under the terms of the Lesser GNU General Public License as published by #
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# the Free Software Foundation, either version 3.0 of the License, or #
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# (at your option) any later version. #
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# #
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# IfcOpenShell is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# Lesser GNU General Public License for more details. #
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# #
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# You should have received a copy of the Lesser GNU General Public License #
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# along with this program. If not, see <http://www.gnu.org/licenses/>. #
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# #
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################################################################################
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# Web (Emscripten + WebGPU) build root.
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#
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# This is a SEPARATE root from cmake/CMakeLists.txt — the desktop CMake
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# pulls in Qt, OpenCASCADE, IfcGeom, CGAL, Boost, none of which exist or
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# make sense for wasm. The web build only needs IfcViewerCore (the
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# Qt-free, OpenCASCADE-free static lib carved out of src/ifcviewer)
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# plus this main_web.cpp scaffold.
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#
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# Usage:
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# source /path/to/emsdk_env.sh
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# emcmake cmake -S src/ifcviewer-web -B build-web
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# ninja -C build-web
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# python3 -m http.server --directory build-web 8080
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# # open http://localhost:8080/IfcViewerWeb.html
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#
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# Why a separate root and not a sub-add under cmake/CMakeLists.txt:
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# making every find_package() conditional on (NOT EMSCRIPTEN) would
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# pollute the desktop build with web-only branches it never exercises.
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# Better to keep the web path's machinery local to this directory.
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cmake_minimum_required(VERSION 3.21)
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project(IfcViewerWeb LANGUAGES CXX)
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if(NOT EMSCRIPTEN)
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message(FATAL_ERROR
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"src/ifcviewer-web requires the Emscripten toolchain. "
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"Re-run via `emcmake cmake ...`.")
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endif()
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set(CMAKE_CXX_STANDARD 17)
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set(CMAKE_CXX_STANDARD_REQUIRED ON)
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# Allow find_package to look at the host system for header-only deps
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# (Eigen3 is the only one we need). Emscripten's CMake toolchain
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# defaults this to ONLY, which restricts searches to the emcc sysroot
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# and blocks the system Eigen3Config.cmake. Eigen is pure-header so
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# pulling its include path from the host is completely safe.
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set(CMAKE_FIND_ROOT_PATH_MODE_PACKAGE BOTH)
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set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE BOTH)
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# --- IfcViewerCore: portable runtime subset ----------------------------------
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#
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# Build IfcViewerCore by adding src/ifcviewer as a subdir. The Qt /
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# IfcGeom / OpenCASCADE-coupled IfcViewer target inside that CMakeLists
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# will fail under emcc (find_package(Qt6) etc. won't resolve), so the
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# subdir's full build can't be reached here. We add it with EXCLUDE_FROM_ALL
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# so only the targets we explicitly reference (IfcViewerCore) are built.
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# Eigen and wgpu_native (the latter becomes a no-op interface under
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# EMSCRIPTEN — see ifcviewer/CMakeLists.txt) get pulled in transitively.
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#
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# TODO(web): when src/ifcviewer/CMakeLists.txt is taught to skip the
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# Qt-using IfcViewer target under EMSCRIPTEN, we can drop EXCLUDE_FROM_ALL.
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set(IFCVIEWER_DIR "${CMAKE_CURRENT_SOURCE_DIR}/../ifcviewer")
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add_subdirectory(${IFCVIEWER_DIR} ifcviewer EXCLUDE_FROM_ALL)
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# --- The web executable ------------------------------------------------------
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add_executable(IfcViewerWeb
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main_web.cpp
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WebViewportHost.cpp
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WebViewportHost.h
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)
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target_link_libraries(IfcViewerWeb PRIVATE IfcViewerCore)
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target_link_options(IfcViewerWeb PRIVATE
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# Asyncify lets us await wgpu's RequestAdapter/RequestDevice/MapAsync
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# as if they were synchronous. Adds ~30-50% wasm size and a small
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# per-await runtime cost; acceptable for the spike, revisit when
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# we ship.
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"-sASYNCIFY"
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# Streaming + chunked geometry want a heap that can grow as buffers
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# arrive. 256 MB initial, 2 GB ceiling (matches the wasm32 pointer
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# cap; --shared64 / MEMORY64 would lift this later if we need it).
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"-sALLOW_MEMORY_GROWTH=1"
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"-sINITIAL_MEMORY=268435456" # 256 MB
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"-sMAXIMUM_MEMORY=2147483648" # 2 GB
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# FETCH lets emscripten_fetch issue HTTP Range requests for the
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# sidecar byte-range loader. Not used yet by the scaffold but
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# needed by the upcoming #27 web streaming I/O backend.
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"-sFETCH=1"
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# Shell template wraps the JS output in our canvas page.
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"--shell-file=${CMAKE_CURRENT_SOURCE_DIR}/shell.html"
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)
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set_target_properties(IfcViewerWeb PROPERTIES SUFFIX ".html")
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