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Diffstat (limited to 'webp_js/README.md')
| -rw-r--r-- | webp_js/README.md | 23 |
1 files changed, 1 insertions, 22 deletions
diff --git a/webp_js/README.md b/webp_js/README.md index 824afa0b..ae9ce8f0 100644 --- a/webp_js/README.md +++ b/webp_js/README.md @@ -20,8 +20,7 @@ Emscripten and CMake. ```shell cd webp_js && \ - emcmake cmake -DWEBP_BUILD_WEBP_JS=ON \ - ../ + emcmake cmake -DWEBP_BUILD_WEBP_JS=ON ../ ``` - compile webp.js using 'emmake make'. @@ -55,27 +54,7 @@ directory. See webp_js/index_wasm.html for a simple demo page using the WASM version of the library. -You will need a fairly recent version of Emscripten (at least 2.0.18, -latest-upstream is recommended) and of your WASM-enabled browser to run this -version. - ## Caveats - First decoding using the library is usually slower, due to just-in-time compilation. - -- Some versions of llvm produce the following compile error when SSE2 is - enabled. - - ``` - "Unsupported: %516 = bitcast <8 x i16> %481 to i128 - LLVM ERROR: BitCast Instruction not yet supported for integer types larger than 64 bits" - ``` - - The corresponding Emscripten bug is at: - https://github.com/kripken/emscripten/issues/3788 - - Therefore, SSE2 optimization is currently disabled in CMakeLists.txt. - -- If WEBP_ENABLE_SIMD is set to 1 the JavaScript version (webp.js) will be - disabled as wasm2js does not support SIMD. |