wasmcv.org/wasm/cv

wasmCV

Generated Go bindings for wasmCV WebAssembly interfaces to computer vision systems.

See https://github.com/wasmvision/wasmcv for information about wasmCV.

How to use

This example Go module exports a process() function to the WASM host application. When the host calls the processor, it passes in the wasmCV image Mat to be processed. The wasmCV module then calls functions on that Mat which are handled by the host application, by calling OpenCV to actually perform the operations.

package main

import (
	"github.com/hybridgroup/mechanoid/convert"
	"wasmcv.org/wasm/cv/mat"
)

//go:wasmimport hosted println
func println(ptr, size uint32)

//export process
func process(image mat.Mat) mat.Mat {
	println(convert.StringToWasmPtr("Cols: " +
		convert.IntToString(int(image.Cols())) +
		" Rows: " +
		convert.IntToString(int(image.Rows())) +
		" Type: " +
		convert.IntToString(int(image.Mattype()))))

	return image
}

Install the wasmcv package into your Go package:

go get wasmcv.org/wasm/cv

You can then compile this module using the TinyGo compiler.

tinygo build -o processor.wasm -target=wasm-unknown processor.go

Note that the wasm-unknown target can be used with wasmCV to produce very lightweight guest modules. The example above compiles to around 31k, including debug information.

-rwxrwxr-x 1 ron ron 31248 sep 11 11:00 processor.wasm