Panic while using surfman to render in offscreen ?

[Brooooooklyn]

If I want rendering canvas in Server, which don't have screen.
Could I use pathfinder with rust-offscreen-rendering-context?

[Brooooooklyn]

Run with rust-offscreen-rendering-context failed:

  let window_size = Vector2I::new(640, 480);
  GLContext::<NativeGLContext>::new_shared_with_dispatcher(
    Size2D::new(window_size.x(), window_size.y()),
    GLContextAttributes::default(),
    ColorAttachmentType::default(),
    sparkle::gl::GlType::Gl,
    OffScreenGlVersion::MajorMinor(4, 1),
    None,
    None,
  )
  .unwrap();

  gl::load_with(|name| GLContext::<NativeGLContext>::get_proc_address(name) as *const _);

  let shaders_dir = PathBuf::from(env::current_dir().unwrap());
  // Create a Pathfinder renderer.
  let mut renderer = Renderer::new(
    GLDevice::new(GLVersion::GL3, 0),
    &FilesystemResourceLoader {
      directory: shaders_dir,
    },
    DestFramebuffer::full_window(window_size),
    RendererOptions {
      background_color: Some(ColorF::white()),
    },
  );

thread 'main' panicked at 'Vertex shader 'fill' compilation failed', /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/67d12ad/gl/src/lib.rs:360:9
stack backtrace:
   0: std::sys_common::at_exit_imp::push
   1: core::fmt::ArgumentV1::show_usize
   2: std::io::Write::write_fmt
   3: std::panicking::default_hook::{{closure}}
   4: std::panicking::default_hook
   5: <std::panicking::begin_panic::PanicPayload<A> as core::panic::BoxMeUp>::get
   6: std::panicking::try::do_call
   7: std::panicking::begin_panic_fmt
             at src/libstd/panicking.rs:326
   8: <pathfinder_gl::GLDevice as pathfinder_gpu::Device>::create_shader_from_source
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/67d12ad/gl/src/lib.rs:360
   9: <pathfinder_gl::GLDevice as pathfinder_gpu::Device>::create_shader
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/67d12ad/gl/src/lib.rs:818
  10: pathfinder_gpu::Device::create_program_from_shader_names
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/67d12ad/gpu/src/lib.rs:111
  11: pathfinder_gpu::Device::create_program
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/67d12ad/gpu/src/lib.rs:118
  12: pathfinder_renderer::gpu::shaders::FillProgram<D>::new
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/67d12ad/renderer/src/gpu/shaders.rs:299
  13: pathfinder_renderer::gpu::renderer::Renderer<D>::new
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/67d12ad/renderer/src/gpu/renderer.rs:130
  14: canvas_bench::main
             at src/main.rs:53
  15: std::rt::lang_start::{{closure}}
             at /rustc/5e1a799842ba6ed4a57e91f7ab9435947482f7d8/src/libstd/rt.rs:67
  16: std::panicking::try::do_call
  17: panic_unwind::dwarf::eh::read_encoded_pointer
  18: std::panicking::rust_panic_without_hook
  19: std::rt::lang_start
             at /rustc/5e1a799842ba6ed4a57e91f7ab9435947482f7d8/src/libstd/rt.rs:67
  20: canvas_bench::main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[pcwalton]

r-o-r-c is going to be replaced with http://github.com/pcwalton/surfman, and I want to replace SDL with that eventually.

[Brooooooklyn]

Switch to surfman I got the same error.
Minimal repo to reproduce: https://github.com/Brooooooklyn/pathfinder-offscreen

thread 'main' panicked at 'GL error: 0x506 (INVALID_FRAMEBUFFER_OPERATION)', .cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/5421525/gl/src/lib.rs:1349:7
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /Users/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/libunwind.rs:88
   1: backtrace::backtrace::trace_unsynchronized
             at /Users/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.40/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at src/libstd/sys_common/backtrace.rs:84
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at src/libstd/sys_common/backtrace.rs:61
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1025
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1426
   6: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:65
   7: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:50
   8: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:193
   9: std::panicking::default_hook
             at src/libstd/panicking.rs:210
  10: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:471
  11: rust_begin_unwind
             at src/libstd/panicking.rs:375
  12: std::thread::local::fast::Key<T>::try_initialize
  13: pathfinder_gl::ck
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/5421525/gl/src/lib.rs:1349
  14: pathfinder_gl::GLDevice::clear
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/5421525/gl/src/lib.rs:944
  15: pathfinder_gl::GLDevice::set_render_state
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/5421525/gl/src/lib.rs:82
  16: <pathfinder_gl::GLDevice as pathfinder_gpu::Device>::draw_elements
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/5421525/gl/src/lib.rs:698
  17: pathfinder_renderer::gpu::renderer::Renderer<D>::draw_solid_tiles
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/5421525/renderer/src/gpu/renderer.rs:839
  18: pathfinder_renderer::gpu::renderer::Renderer<D>::render_command
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/5421525/renderer/src/gpu/renderer.rs:355
  19: pathfinder_renderer::concurrent::scene_proxy::SceneProxy::build_and_render
             at /Users/longyinan/.cargo/git/checkouts/pathfinder-f0bd20e7aa700f92/5421525/renderer/src/concurrent/scene_proxy.rs:90
  20: canvas_bench::main
             at src/main.rs:111
  21: std::rt::lang_start::{{closure}}
             at /rustc/5e1a799842ba6ed4a57e91f7ab9435947482f7d8/src/libstd/rt.rs:67
  22: std::rt::lang_start_internal::{{closure}}
             at src/libstd/rt.rs:52
  23: std::panicking::try::do_call
             at src/libstd/panicking.rs:292
  24: __rust_maybe_catch_panic
             at src/libpanic_unwind/lib.rs:78
  25: std::panicking::try
             at src/libstd/panicking.rs:270
  26: std::panic::catch_unwind
             at src/libstd/panic.rs:394
  27: std::rt::lang_start_internal
             at src/libstd/rt.rs:51
  28: std::rt::lang_start
             at /rustc/5e1a799842ba6ed4a57e91f7ab9435947482f7d8/src/libstd/rt.rs:67
  29: canvas_bench::main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[Brooooooklyn]

@pcwalton could you please help me with this issue? I'm doing a NodeJS bindings for pathfinder, and I need an example to render canvas offscreen.

[Brooooooklyn]

Close because it seems to be a bug in servo/surfman#163