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WebP-JS: emscripten-based Javascript decoder

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The build is based on CMake.

There is a demo HTML page under webp_js/index.html

See README.webp_js file.

BUG=webp:261

Change-Id: I6612378b89907efd7b863720c6becf98385fc406
This commit is contained in:
Pascal Massimino
2017-02-07 10:25:41 +01:00
parent 5b393f2d2a
commit ca9f7b7dd6
4 changed files with 149 additions and 1 deletions
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18
CMakeLists.txt
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@@ -8,9 +8,14 @@ option(WEBP_BUILD_CWEBP "Build the cwebp command line tool." OFF)
option(WEBP_BUILD_DWEBP "Build the dwebp command line tool." OFF)
option(WEBP_BUILD_GIF2WEBP "Build the gif2webp conversion tool." OFF)
option(WEBP_BUILD_IMG2WEBP "Build the img2webp animation tool." OFF)
option(WEBP_BUILD_WEBP_JS "Emscripten build of webp.js." OFF)
option(WEBP_EXPERIMENTAL_FEATURES "Build with experimental features." OFF)
option(WEBP_ENABLE_SWAP_16BIT_CSP "Enable byte swap for 16 bit colorspaces." OFF)
if(WEBP_BUILD_WEBP_JS)
set(WEBP_ENABLE_SIMD OFF)
endif()
set(WEBP_DEP_LIBRARIES)
set(WEBP_DEP_INCLUDE_DIRS)
@@ -135,7 +140,7 @@ endforeach()
# Build the executables if asked for.
if(WEBP_BUILD_CWEBP OR WEBP_BUILD_DWEBP OR
WEBP_BUILD_GIF2WEBP OR WEBP_BUILD_IMG2WEBP)
WEBP_BUILD_GIF2WEBP OR WEBP_BUILD_IMG2WEBP OR WEBP_BUILD_WEBP_JS)
# Example utility library.
parse_Makefile_am(${CMAKE_CURRENT_SOURCE_DIR}/examples "EXAMPLEUTIL_SRCS"
"example_util_[^ ]*")
@@ -204,3 +209,14 @@ if(WEBP_BUILD_IMG2WEBP)
add_executable(img2webp ${IMG2WEBP_SRCS})
target_link_libraries(img2webp exampleutil imagedec imageioutil webp webpmux)
endif()
if(WEBP_BUILD_WEBP_JS)
add_executable(webp_js
${CMAKE_CURRENT_SOURCE_DIR}/extras/webp_to_sdl.c)
target_link_libraries(webp_js webpdecoder SDL)
set_target_properties(webp_js PROPERTIES LINK_FLAGS
"-s EXPORTED_FUNCTIONS='[\"_WebpToSDL\"]' -s INVOKE_RUN=0")
set_target_properties(webp_js PROPERTIES OUTPUT_NAME webp)
target_compile_definitions(webp_js PUBLIC EMSCRIPTEN WEBP_HAVE_SDL)
target_compile_definitions(webpdecoder PUBLIC EMSCRIPTEN)
endif()