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Backends, Examples: removed Emscripten < 4.0.10 support. Removed IMGUI_IMPL_WEBGPU_BACKEND_WGPU. (#9281, #8381)

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- This commit removes the option of using -sUSE_WEBGPU=1 from CMake and make
- Compiling with a version of Emscripten >= 4.0.10 will work the same way as it was before
- Compiling with a version of Emscripten < 4.0.10 will print an error message and abort the build (in the case of CMake)
- Since there can only be 1 implementation for the backend in the case of Emscripten, this commit cleans the code accordingly
This commit is contained in:
Yan Pujante
2026-03-09 15:45:34 +01:00
committed by ocornut
parent 6f8bdb7bf7
commit e92820db2a
14 changed files with 24 additions and 161 deletions
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examples/example_sdl2_wgpu/README.md
+1 -6
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@@ -60,12 +60,7 @@ For the WASM code produced by Emscripten to work correctly, it will also be nece
CMake checks the EMSCRIPEN version then:
- if EMS >= 4.0.10 uses `--use-port=emdawnwebgpu` flag to build
- it set `IMGUI_IMPL_WEBGPU_BACKEND_DAWN` compiler define
- if EMS < 4.0.10 uses `-sUSE_WEBGPU=1` flag to build
- it set `IMGUI_IMPL_WEBGPU_BACKEND_WGPU` compiler define
#### Generate Emscripten forcing `-sUSE_WEBGPU=1` deprecated flag even with EMS >= 4.0.10
- `emcmake cmake -G Ninja -DIMGUI_EMSCRIPTEN_WEBGPU_FLAG="-sUSE_WEBGPU=1" -B where_to_build_dir`
- it set `IMGUI_IMPL_WEBGPU_BACKEND_WGPU` compiler define
- if EMS < 4.0.10 the build aborts (`-sUSE_WEBGPU=1` is no longer supported in ImGui)
#### Generate Emscripten using external WebGPU library (emdawnwebgpu_pkg)
- `emcmake cmake -G Ninja -DIMGUI_EMSCRIPTEN_WEBGPU_FLAG="--use-port=path_to_emdawnwebgpu_pkg" -B where_to_build_dir`