GLSL error using Ubuntu.

[diegozea]

I've found this problem when I was trying to run the README example using Ubuntu.

julia> Application(windows=[window1, window2], title="App", frame=(width=430, height=300))
┌ Error: [GL]: failed to compile vertex shader: 2: 0:1(10): error: GLSL 1.50 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES
│ 
└ @ Nuklear.GLFWBackend ~/.julia/packages/Nuklear/vnDoP/src/backend/GLFW/impl.jl:29
┌ Error: [GL]: failed to compile fragment shader: 2: 0:1(10): error: GLSL 1.50 is not supported. Supported versions are: 1.10, 1.20, 1.30, 1.00 ES, 3.00 ES, 3.10 ES, and 3.20 ES
│ 
└ @ Nuklear.GLFWBackend ~/.julia/packages/Nuklear/vnDoP/src/backend/GLFW/impl.jl:40
ERROR: AssertionError: status_ref[] == GL_TRUE
Stacktrace:
 [1] nk_glfw3_device_create() at /home/zea/.julia/packages/Nuklear/vnDoP/src/backend/GLFW/impl.jl:48
 [2] nk_glfw3_init(::GLFW.Window, ::Int64, ::Int64, ::Int64) at /home/zea/.julia/packages/Nuklear/vnDoP/src/backend/GLFW/impl.jl:109
 [3] #setup_glfw#1 at /home/zea/.julia/packages/Poptart/sPKb9/src/Desktop/application.jl:32 [inlined]
 [4] (::getfield(Poptart.Desktop, Symbol("#kw##setup_glfw")))(::NamedTuple{(:title, :frame),Tuple{String,NamedTuple{(:width, :height),Tuple{Int64,Int64}}}}, ::typeof(Poptart.Desktop.setup_glfw)) at ./none:0
 [5] (::getfield(Poptart.Desktop, Symbol("##Application#2#4")))(::String, ::NamedTuple{(:width, :height),Tuple{Int64,Int64}}, ::Array{Poptart.Desktop.Windows.Window,1}, ::Bool, ::Type) at /home/zea/.julia/packages/Poptart/sPKb9/src/Desktop/application.jl:100
 [6] (::getfield(Core, Symbol("#kw#Type")))(::NamedTuple{(:windows, :title, :frame),Tuple{Array{Poptart.Desktop.Windows.Window,1},String,NamedTuple{(:width, :height),Tuple{Int64,Int64}}}}, ::Type{Application}) at ./none:0
 [7] top-level scope at none:0

System info:

Julia Version 1.1.0
Commit 80516ca202 (2019-01-21 21:24 UTC)
Platform Info:
  OS: Linux (x86_64-pc-linux-gnu)
      Ubuntu 16.04.5 LTS
  uname: Linux 4.15.0-43-generic #46~16.04.1-Ubuntu SMP Fri Dec 7 13:31:08 UTC 2018 x86_64 x86_64
  CPU: Intel(R) Xeon(R) CPU E5-2609 v3 @ 1.90GHz: 
              speed         user         nice          sys         idle          irq
       #1  1487 MHz    2681662 s     101728 s     988295 s   90808597 s          0 s
       #2  1253 MHz    2660691 s      93147 s     969112 s   90851260 s          0 s
       #3  1734 MHz    2539026 s     105755 s     940643 s   90927014 s          0 s
       #4  1300 MHz    2513564 s     115664 s     969922 s   90797916 s          0 s
       #5  1197 MHz    2460855 s     100685 s     971067 s   90859970 s          0 s
       #6  1218 MHz    2509544 s     108416 s    1037186 s   90811892 s          0 s
       
  Memory: 31.339038848876953 GB (3910.5625 MB free)
  Uptime: 955860.0 sec
  Load Avg:  1.15673828125  1.5859375  1.7822265625
  WORD_SIZE: 64
  LIBM: libopenlibm
  LLVM: libLLVM-6.0.1 (ORCJIT, haswell)
Environment:
  TERM = xterm-256color
  XDG_SESSION_PATH = /org/freedesktop/DisplayManager/Session0
  XDG_SEAT_PATH = /org/freedesktop/DisplayManager/Seat0
  DEFAULTS_PATH = /usr/share/gconf/ubuntu.default.path
  PATH = /home/zea/bin:/home/zea/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/zea/bin:/home/zea/.linuxbrew/bin
  MANDATORY_PATH = /usr/share/gconf/ubuntu.mandatory.path
  HOME = /home/zea
  COMPIZ_BIN_PATH = /usr/bin/

[wookay]

I don't have a linux machine now, by fix edbf1a0
could you update master branch and test it again?

[Gnimuc]

hi @diegozea, according to the following list, your desktop OpenGL version seems to be 3.0.

https://github.com/mattdesl/lwjgl-basics/wiki/glsl-versions#glsl-versions

unfortunately, I only implement a backend based on ModernGL(OpenGL 3.2+) for now, so you could try upgrading your GPU driver to see whether the hardware supports ModernGL.

[Gnimuc]

@diegozea I'm also writing a wrapper for imgui which do support GLSL 130, maybe you're interested in this https://github.com/Gnimuc/CImGui.jl/blob/master/examples/demo.jl

I'm currently translating imgui demos from C++ to Julia. For now, about 80% of the widgets can be working correctly but don't worry if you trigger segfaults, that's definitely my bad. :P