HiDPI Support

[billop]

It's tiny on a 4k screen and doesn't seem to be able to resize. If I toggle fullscreen from X11, the game crashes:

thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: UpdateFailed("Update failed because input buffer is too small. Required size for 3840 x 2160 window (1x scale) is 33177600 bytes but the size of the input buffer has the size 2764800 bytes")', src/libcore/result.rs:1084:5
stack backtrace:
   0: backtrace::backtrace::libunwind::trace
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/libunwind.rs:88
   1: backtrace::backtrace::trace_unsynchronized
             at /cargo/registry/src/github.com-1ecc6299db9ec823/backtrace-0.3.34/src/backtrace/mod.rs:66
   2: std::sys_common::backtrace::_print
             at src/libstd/sys_common/backtrace.rs:47
   3: std::sys_common::backtrace::print
             at src/libstd/sys_common/backtrace.rs:36
   4: std::panicking::default_hook::{{closure}}
             at src/libstd/panicking.rs:200
   5: std::panicking::default_hook
             at src/libstd/panicking.rs:214
   6: std::panicking::rust_panic_with_hook
             at src/libstd/panicking.rs:477
   7: std::panicking::continue_panic_fmt
             at src/libstd/panicking.rs:384
   8: rust_begin_unwind
             at src/libstd/panicking.rs:311
   9: core::panicking::panic_fmt
             at src/libcore/panicking.rs:85
  10: core::result::unwrap_failed
             at src/libcore/result.rs:1084
  11: castle_game::main
  12: std::rt::lang_start::{{closure}}
  13: std::rt::lang_start_internal::{{closure}}
             at src/libstd/rt.rs:49
  14: std::panicking::try::do_call
             at src/libstd/panicking.rs:296
  15: __rust_maybe_catch_panic
             at src/libpanic_unwind/lib.rs:80
  16: std::panicking::try
             at src/libstd/panicking.rs:275
  17: std::panic::catch_unwind
             at src/libstd/panic.rs:394
  18: std::rt::lang_start_internal
             at src/libstd/rt.rs:48
  19: main
  20: __libc_start_main
  21: _start
note: Some details are omitted, run with `RUST_BACKTRACE=full` for a verbose backtrace.

[tversteeg]

Thanks for the bug report. It's kind of hard to implement rescaling with the current framework but I've upscaled everything 2 times now.

[billop]

Thanks, kudos for game deving with Rust btw, doesn't seem easy.