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wasm: intoduce saveTvg via File System API

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This patch adds saveTvg() function into thorvgwasm.cpp.
Functions saves tvg using File System API.
To enable fs, changed build flag: -s FORCE_FILESYSTEM=1.
Increase in result thorvg-wasm.js size: about 68kB to about 125kB.
This commit is contained in:
Michal Maciola 2021-08-25 14:36:35 +02:00 • committed by Hermet Park
parent fe474856b9
commit 7be4bf4c4f
2 changed files with 24 additions and 3 deletions
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23
src/wasm/thorvgwasm.cpp
View file

@ -139,6 +139,25 @@ public:
return val(typed_memory_view(mWidth * mHeight * 4, mBuffer.get()));
}
bool saveTvg()
{
mErrorMsg = "None";
auto saver = tvg::Saver::gen();
auto duplicate = unique_ptr<tvg::Picture>(static_cast<tvg::Picture*>(mPicture->duplicate()));
if (!saver || !duplicate) {
mErrorMsg = "Saving initialization failed";
return false;
}
if (saver->save(move(duplicate), "file.tvg") != tvg::Result::Success) {
mErrorMsg = "Tvg saving failed";
return false;
}
saver->sync();
return true;
}
private:
explicit ThorvgWasm()
{
@ -183,5 +202,7 @@ EMSCRIPTEN_BINDINGS(thorvg_bindings) {
.function("getDefaultData", &ThorvgWasm::getDefaultData, allow_raw_pointers())
.function("load", &ThorvgWasm::load)
.function("update", &ThorvgWasm::update)
.function("render", &ThorvgWasm::render);
.function("render", &ThorvgWasm::render)
.function("saveTvg", &ThorvgWasm::saveTvg);
}

4
wasm_cross.txt
View file

@ -5,8 +5,8 @@ ar = 'EMSDK:upstream/emscripten/emar.py'
[properties]
root = 'EMSDK:upstream/emscripten/system'
cpp_args = ['--bind' , '-s' , 'WASM=1' , '-s' , 'ALLOW_MEMORY_GROWTH=1' , '-s' , 'FILESYSTEM=0' , '-O2']
cpp_link_args = ['--bind' , '-s' , 'WASM=1' , '-s' , 'ALLOW_MEMORY_GROWTH=1' , '-s' , 'FILESYSTEM=0' , '-O2']
cpp_args = ['--bind' , '-s' , 'WASM=1' , '-s' , 'ALLOW_MEMORY_GROWTH=1' , '-s' , 'FORCE_FILESYSTEM=1' , '-O2']
cpp_link_args = ['--bind' , '-s' , 'WASM=1' , '-s' , 'ALLOW_MEMORY_GROWTH=1' , '-s' , 'FORCE_FILESYSTEM=1' , '-O2']
shared_lib_suffix = 'js'
static_lib_suffix = 'js'
shared_module_suffix = 'js'