Generative Design example p_3_0_01 glyph can be too large

[sbauer322]

Triggers in p_3_0_01.rs by moving the mouse into the window and to the far right.

/Users/sbauer/.cargo/bin/cargo run --color=always --package generative_design --example p_3_0_01
   Compiling generative_design v0.1.0 (/Users/sbauer/Documents/dev/nannou/generative_design)
    Finished dev [unoptimized + debuginfo] target(s) in 6.27s
     Running `target/debug/examples/p_3_0_01`
failed to cache queued glyphs: Glyph too large
thread 'main' panicked at 'assertion failed: `(left != right)`
  left: `0`,
 right: `0`', /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/wgpu-0.5.0/src/lib.rs:940:9
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /Users/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/libunwind.rs:86
   1: backtrace::backtrace::trace_unsynchronized
             at /Users/runner/.cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.46/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print_fmt
             at src/libstd/sys_common/backtrace.rs:78
   3: <std::sys_common::backtrace::_print::DisplayBacktrace as core::fmt::Display>::fmt
             at src/libstd/sys_common/backtrace.rs:59
   4: core::fmt::write
             at src/libcore/fmt/mod.rs:1069
   5: std::io::Write::write_fmt
             at src/libstd/io/mod.rs:1504
   6: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:62
   7: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:49
   8: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:198
   9: std::panicking::default_hook
             at src/libstd/panicking.rs:218
  10: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:511
  11: rust_begin_unwind
             at src/libstd/panicking.rs:419
  12: std::panicking::begin_panic_fmt
  13: wgpu::Device::create_buffer_mapped
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/wgpu-0.5.0/src/lib.rs:940
  14: wgpu::Device::create_buffer_with_data
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/wgpu-0.5.0/src/lib.rs:964
  15: nannou::draw::renderer::Renderer::encode_render_pass
             at nannou/src/draw/renderer/mod.rs:820
  16: nannou::draw::renderer::Renderer::render_to_frame
             at nannou/src/draw/renderer/mod.rs:932
  17: nannou::app::<impl nannou::draw::Draw>::to_frame
             at nannou/src/app.rs:911
  18: p_3_0_01::view
             at generative_design/type/p_3_0_01.rs:74
  19: nannou::app::run_loop::{{closure}}
             at ./nannou/src/app.rs:1115
  20: <alloc::boxed::Box<F> as core::ops::function::FnMut<A>>::call_mut
             at /Users/sbauer/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/src/rust/src/liballoc/boxed.rs:1015
  21: <winit::platform_impl::platform::app_state::EventLoopHandler<T> as winit::platform_impl::platform::app_state::EventHandler>::handle_nonuser_event
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/winit-0.22.2/src/platform_impl/macos/app_state.rs:71
  22: winit::platform_impl::platform::app_state::Handler::handle_nonuser_event
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/winit-0.22.2/src/platform_impl/macos/app_state.rs:172
  23: winit::platform_impl::platform::app_state::AppState::cleared
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/winit-0.22.2/src/platform_impl/macos/app_state.rs:330
  24: winit::platform_impl::platform::observer::control_flow_end_handler
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/winit-0.22.2/src/platform_impl/macos/observer.rs:135
  25: _ZL12preoptimized
  26: _ZL12preoptimized
  27: _ZL12preoptimized
  28: _ZL12preoptimized
  29: _ZL12preoptimized
  30: _ZL12preoptimized
  31: _ZL12preoptimized
  32: _ZL12preoptimized
  33: _ZL12preoptimized
  34: _ZL12preoptimized
  35: <() as objc::message::MessageArguments>::invoke
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/objc-0.2.7/src/message/mod.rs:128
  36: objc::message::platform::send_unverified
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/objc-0.2.7/src/message/apple/mod.rs:27
  37: objc::message::send_message
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/objc-0.2.7/src/message/mod.rs:178
  38: winit::platform_impl::platform::event_loop::EventLoop<T>::run_return
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/objc-0.2.7/src/macros.rs:133
  39: winit::platform_impl::platform::event_loop::EventLoop<T>::run
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/winit-0.22.2/src/platform_impl/macos/event_loop.rs:89
  40: winit::event_loop::EventLoop<T>::run
             at /Users/sbauer/.cargo/registry/src/github.com-1ecc6299db9ec823/winit-0.22.2/src/event_loop.rs:149
  41: nannou::app::run_loop
             at ./nannou/src/app.rs:1020
  42: nannou::app::Builder<M,E>::run
             at ./nannou/src/app.rs:471
  43: p_3_0_01::main
             at generative_design/type/p_3_0_01.rs:35
  44: std::rt::lang_start::{{closure}}
             at /Users/sbauer/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/rt.rs:67
  45: std::rt::lang_start_internal::{{closure}}
             at src/libstd/rt.rs:52
  46: std::panicking::try::do_call
             at src/libstd/panicking.rs:331
  47: std::panicking::try
             at src/libstd/panicking.rs:274
  48: std::panic::catch_unwind
             at src/libstd/panic.rs:394
  49: std::rt::lang_start_internal
             at src/libstd/rt.rs:51
  50: std::rt::lang_start
             at /Users/sbauer/.rustup/toolchains/stable-x86_64-apple-darwin/lib/rustlib/src/rust/src/libstd/rt.rs:67
  51: main
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

Process finished with exit code 101

[mitchmindtree]

Thanks for the issue!

The following options come to mind for addressing this:

1. Limiting the max text size or
2. Exposing some way for the user to specify the dimensions of the glyph cache used for the draw::Renderer owned by the App. Currently, the draw::Renderer itself already allows for specifying this via its constructor, however the draw::Renderer created by the App currently assumes the default dimensions.
3. Increase the default glyph cache texture dimensions.