emscripten-core / emscripten-core/emscripten
renderViaOffscreenBackBuffer error
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Description
https://emscripten.org/docs/api_reference/html5.h.html?highlight=offscreen#c.EmscriptenWebGLContextAttributes.renderViaOffscreenBackBuffer
set attr.renderViaOffscreenBackBuffer = EM_TRUE; andvia the -s OFFSCREEN_FRAMEBUFFER Emscripten linker flag. render the context error.
the demo is in
https://github.com/yangfangfang1204/offscreen/tree/main/viaOffscreenBackBuffer/SuperRenderMT2.cpp
the compile script is in
https://github.com/yangfangfang1204/offscreen/blob/main/viaOffscreenBackBuffer/readme.txt
compile the demo in emscriptenV2.0.30，run the demo in ChromeV111 , the error occur:
SuperRenderMT2.js:6075 Uncaught TypeError: Cannot read properties of undefined (reading 'clearColor')
at _emscripten_glClearColor (SuperRenderMT2.js:6075:7)
at SuperRenderMT2.wasm:0x3625
at SuperRenderMT2.wasm:0x2fed
at SuperRenderMT2.wasm:0x3c73
at SuperRenderMT2.js:1483:20
at worker.onmessage (SuperRenderMT2.js:1822:5)
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