kotlin

WebGLRenderingContext is a big API, it has 200+ properties and 100+ methods, writing a JavaScript stub and corresponding Kotlin stub is very difficult 

We need to write 1400+ lines of JavaScript code and 3000+ lines Kotlin code

This Kotlin gradle script provides a simple approach to auto generate the stub and also compile the generated code to .klib

Gradle Stub Code in KTS

Kotlin WebAssembly runtime provides a global JavaScript array called heap

which can be accessed if the pointer of a variable is known

The pointer and size of the variable can be determined by library methods stringPointer and stringLengthBytes

The from JavaScript the value can be updated with below logic

Kotlin Main Code

From JavaScript as of now we cannot pass string to WebAssembly, therefore the string will be converted to an array of bytes and kept in browser's memory object of the kotlin web assembly framework object kotlinObject

From WebAssembly by calling the JavaScript method for each character, transfer the numeric value

Then convert the numeric value to character and combine to a string in kotlin

This is achieved using below code

JavaScript: string to UTF array utlity

Kotlin Shared DLL and Python Extension

GitHub: https://github.com/dickensas/kotlindll

Compile and Execute from MSYS2 or Cygwin with python development C header files

Demo Output

Python Code which calls the module

A simple JUnit 5 project with Gradle 6

GitHub: https://github.com/dickensas/kotlin-gradle-templates/tree/master/junit5

GSL library can be used for advanced math operations and vector, stats, sort, permute, fitting, matrix, fourier transform, blas integration

This code demonstration a simple matrix addition and diagonal addition in kotlin using GSL

A simple example of OSMesa driver offscreen rendering to a buffer binary array

This explains OpenGL functions can be used to indirectly manipulate a numeric array

Kotlin Code

GitHub: https://github.com/dickensas/kotlin-gradle-templates/tree/master/gtk4-gsk

This demo kotlin code explains how to render a cairo+graphene rectangle region using GSK

Kotlin Code

This is a small experiment for AVR Atmega8 

GitHub: https://github.com/dickensas/kotlin-gradle-templates/tree/master/arduino-atmega8

A simple swap function which is possibly re-used inside actual avr "C/C++" code as library

This is an experimental code with few glitches

it allows Cygwin+Mingw to use GTK3 from cygwin to render opengl GLEW

GitHub: https://github.com/dickensas/kotlin-gradle-templates/tree/master/gtk3-glew

Kotlin code