zetsin / node-sdl2 Goto Github PK

How would you modify surface pixel values, without having to use the drawPoint?

bugs recently fixed are still in the official repo

Hi Zetsin,

I would like to run two graphical JavaScript applications on two separate displays. Right now, I'm using multiple Adafruit displays with a Raspberry Pi Zero W. They're registered as /dev/fb1 and /dev/fb2 via SPI and display overlays. I set an environmental variable via export SDL_FBDEV="/dev/fb1".
If I'm now running your test.js I end up with the error "No available video device" after I modified app.js slightly:

const SDL_error = require('../dep/SDL_error')
[...]
if(SDL.SDL_Init(flags) != 0) {
console.log(flags);
console.log(SDL_error.SDL_GetError());
this.quit()
return
}

Can you hint me how to use node-sdl2 with multiple dedicated framebuffer devices?

Cheers,
Uwe

I get this error:

digit@mighty-dev MINGW64 ~/Desktop/workspace/node-sdl2 (master)
$ node test/test.js
C:\Users\digit\Desktop\workspace\node-sdl2\node_modules\ffi\lib\dynamic_library.js:74
    throw new Error('Dynamic Linking Error: ' + err)
    ^

Error: Dynamic Linking Error: Win32 error 126
    at new DynamicLibrary (C:\Users\digit\Desktop\workspace\node-sdl2\node_modules\ffi\lib\dynamic_library.js:74:11)
    at Object.Library (C:\Users\digit\Desktop\workspace\node-sdl2\node_modules\ffi\lib\library.js:45:12)
    at Object.<anonymous> (C:\Users\digit\Desktop\workspace\node-sdl2\dep\SDL_stdinc.js:74:5)
    at Module._compile (internal/modules/cjs/loader.js:799:30)
    at Object.Module._extensions..js (internal/modules/cjs/loader.js:810:10)
    at Module.load (internal/modules/cjs/loader.js:666:32)
    at tryModuleLoad (internal/modules/cjs/loader.js:606:12)
    at Function.Module._load (internal/modules/cjs/loader.js:598:3)
    at Module.require (internal/modules/cjs/loader.js:705:19)
    at require (internal/modules/cjs/helpers.js:14:16)

My steps were:

• Clone the repo
• npm install
• node test/test.js

Tested on Windows 10 x64

--

I am getting these same errors when trying to use this module in my project.

Hey Man,

do you have an example of how to add text to the window? I've been trying to figure it out. Thanks!

• Nick

What are your thoughts on...

• Make each module module export libraries and properties, which are aggregated all together in index.js. The result would move all modules to the root so that referencing them would be easy:

  var sdl = require('node-sdl2');
  if (sdl.SDL_Init(sdl.SDL_INIT_VIDEO) != 0) {
    console.log('SDL_Init Error: ' + sdl.SDL_GetError());
    process.exit(1);
  }

  • libraries would be an associative array of the path of the library to load, along with all of the function definitions
  • properties would be an associative array that's merged in after libraries have been loaded

  This would make it really easy to port existing C code over to JavaScript.

• Refactor the library loading to discover the library path (it's just "libSDL2" on Linux)

• Remove the binaries from this package

• Move to some of ES2015?

• Move SDL_Image to its own package: https://github.com/robloach/node-sdl2-image

• Implement additional packages:

  • node-sdl2-mixer
  • node-sdl2-image
  • node-sdl2-gfx
  • node-sdl-ttf

Took this on in #2