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import failed in Electron #1

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YuanTian1991 opened this issue Sep 18, 2021 · 3 comments
Open

import failed in Electron #1

YuanTian1991 opened this issue Sep 18, 2021 · 3 comments

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@YuanTian1991
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Hi:

Thanks for develop this tool, I want to transfer some j2c buffer into image buffer (eventually to base64 for img display). I tried to add this module into my electron project, but a error show up.

abort(CompileError: WebAssembly.instantiate(): expected magic word 00 61 73 6d, found 3c 21 44 4f @+0). Build with -s ASSERTIONS=1 for more info.

image

Do you have any suggestions on how I can fix this? Also, do you know other javascript (node) tool that can do the j2c-image-base64 conversion?

Many Thanks!
@palemieux
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3c 21 44 4f translates to <!DO, so it looks like you were trying to load (using WebAssembly.instantiateStreaming()?) an HTML file (that starts with <!DOCTYPE HTML...) instead of a WebAssembly file.

@YuanTian1991
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Thanks for your previous answer, yes I finally found it's my electron setting up thing. However, I am still struggle to get openhtjs work in my electron App.

For example, I installed library with npm, then encountered problem to read:

I put this line in my react file:

import { Decoder } from "openht/dist/HT";

Then encounter this error.

Failed to compile.
[0] 
[0] ./node_modules/openht/dist/HT.js 16:17
[0] Module parse failed: Cannot use keyword 'await' outside an async function (16:17)
[0] File was processed with these loaders:
[0]  * ./node_modules/babel-loader/lib/index.js
[0] You may need an additional loader to handle the result of these loaders.
[0] | // CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
[0] | import makeHTCodec from './HT_internal.js';
[0] > const ht_codec = await makeHTCodec();
[0] | 
[0] | ht_codec.HTDecoder.prototype.decodeToRGBAArray = function (array_buffer, decompositionLevel = 0) {

Could you provide an example, like load library, read a jp2 image, convert it into jpg. (Actually, my initial plan is to directly convert jp2 binary to base64 string of jpg, but never mind, I can't get any js solution work for JP2 conversation now).

@YuanTian1991
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Sorry, I just found your example here. Will try to follow.

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@YuanTian1991 @palemieux