From 98a96f9f5f186c3eaf617931a2259ef7733cc0c5 Mon Sep 17 00:00:00 2001
From: Ethan Simmons <eesimmons9105@gmail.com>
Date: Fri, 15 Mar 2024 10:58:53 -0500
Subject: [PATCH] Initial commit for transition away from gtk

---
 Cargo.lock     | 403 +++++++++++++++++++++++++++++++++++++++++++++++--
 Cargo.toml     |   2 +
 src/wayland.rs | 283 ++++++++++++++++++++++++++++++++++
 3 files changed, 676 insertions(+), 12 deletions(-)
 create mode 100644 src/wayland.rs

diff --git a/Cargo.lock b/Cargo.lock
index 800727b..1d5b1fe 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -19,9 +19,9 @@ checksum = "f26201604c87b1e01bd3d98f8d5d9a8fcbb815e8cedb41ffccbeb4bf593a35fe"
 
 [[package]]
 name = "anyhow"
-version = "1.0.79"
+version = "1.0.81"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "080e9890a082662b09c1ad45f567faeeb47f22b5fb23895fbe1e651e718e25ca"
+checksum = "0952808a6c2afd1aa8947271f3a60f1a6763c7b912d210184c5149b5cf147247"
 
 [[package]]
 name = "async-trait"
@@ -67,6 +67,12 @@ version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
+[[package]]
+name = "bitflags"
+version = "2.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ed570934406eb16438a4e976b1b4500774099c13b8cb96eec99f620f05090ddf"
+
 [[package]]
 name = "bumpalo"
 version = "3.15.0"
@@ -78,6 +84,20 @@ name = "bytemuck"
 version = "1.14.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a2ef034f05691a48569bd920a96c81b9d91bbad1ab5ac7c4616c1f6ef36cb79f"
+dependencies = [
+ "bytemuck_derive",
+]
+
+[[package]]
+name = "bytemuck_derive"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4da9a32f3fed317401fa3c862968128267c3106685286e15d5aaa3d7389c2f60"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.49",
+]
 
 [[package]]
 name = "byteorder"
@@ -91,7 +111,7 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ab3603c4028a5e368d09b51c8b624b9a46edcd7c3778284077a6125af73c9f0a"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "cairo-sys-rs",
  "glib",
  "libc",
@@ -110,6 +130,32 @@ dependencies = [
  "system-deps",
 ]
 
+[[package]]
+name = "calloop"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fba7adb4dd5aa98e5553510223000e7148f621165ec5f9acd7113f6ca4995298"
+dependencies = [
+ "bitflags 2.4.2",
+ "log",
+ "polling",
+ "rustix",
+ "slab",
+ "thiserror",
+]
+
+[[package]]
+name = "calloop-wayland-source"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0f0ea9b9476c7fad82841a8dbb380e2eae480c21910feba80725b46931ed8f02"
+dependencies = [
+ "calloop",
+ "rustix",
+ "wayland-backend",
+ "wayland-client",
+]
+
 [[package]]
 name = "cc"
 version = "1.0.83"
@@ -141,6 +187,15 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
 
+[[package]]
+name = "concurrent-queue"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d16048cd947b08fa32c24458a22f5dc5e835264f689f4f5653210c69fd107363"
+dependencies = [
+ "crossbeam-utils",
+]
+
 [[package]]
 name = "crc32fast"
 version = "1.4.0"
@@ -181,6 +236,27 @@ version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7a81dae078cea95a014a339291cec439d2f232ebe854a9d672b796c6afafa9b7"
 
+[[package]]
+name = "cursor-icon"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96a6ac251f4a2aca6b3f91340350eab87ae57c3f127ffeb585e92bd336717991"
+
+[[package]]
+name = "dlib"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "330c60081dcc4c72131f8eb70510f1ac07223e5d4163db481a04a0befcffa412"
+dependencies = [
+ "libloading",
+]
+
+[[package]]
+name = "downcast-rs"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9ea835d29036a4087793836fa931b08837ad5e957da9e23886b29586fb9b6650"
+
 [[package]]
 name = "either"
 version = "1.10.0"
@@ -193,6 +269,16 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
+[[package]]
+name = "errno"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a258e46cdc063eb8519c00b9fc845fc47bcfca4130e2f08e88665ceda8474245"
+dependencies = [
+ "libc",
+ "windows-sys",
+]
+
 [[package]]
 name = "exr"
 version = "1.72.0"
@@ -234,7 +320,7 @@ version = "22.12.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5ae1bfc84d904f75e7ef6f8796b020c606a9e8e271e2004c0a74f7edeedba45f"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "rustc_version",
 ]
 
@@ -371,7 +457,7 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "695d6bc846438c5708b07007537b9274d883373dd30858ca881d7d71b5540717"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "gdk-pixbuf-sys",
  "gio",
  "glib",
@@ -398,7 +484,7 @@ version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3abf96408a26e3eddf881a7f893a1e111767137136e347745e8ea6ed12731ff"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "cairo-rs",
  "gdk-pixbuf",
  "gdk4-sys",
@@ -460,7 +546,7 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a6973e92937cf98689b6a054a9e56c657ed4ff76de925e36fc331a15f0c5d30a"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "futures-channel",
  "futures-core",
  "futures-io",
@@ -493,7 +579,7 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3fad45ba8d4d2cea612b432717e834f48031cd8853c8aaf43b2c79fec8d144b"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "futures-channel",
  "futures-core",
  "futures-executor",
@@ -575,7 +661,7 @@ version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6f01ef44fa7cac15e2da9978529383e6bee03e570ba5bf7036b4c10a15cc3a3c"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "cairo-rs",
  "gdk4",
  "glib",
@@ -607,7 +693,7 @@ version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b28a32a04cd75cef14a0983f8b0c669e0fe152a0a7725accdeb594e2c764c88b"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "cairo-rs",
  "field-offset",
  "futures-channel",
@@ -743,12 +829,28 @@ version = "0.2.153"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
 
+[[package]]
+name = "libloading"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c2a198fb6b0eada2a8df47933734e6d35d350665a33a3593d7164fa52c75c19"
+dependencies = [
+ "cfg-if",
+ "windows-targets",
+]
+
 [[package]]
 name = "libm"
 version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ec2a862134d2a7d32d7983ddcdd1c4923530833c9f2ea1a44fc5fa473989058"
 
+[[package]]
+name = "linux-raw-sys"
+version = "0.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "01cda141df6706de531b6c46c3a33ecca755538219bd484262fa09410c13539c"
+
 [[package]]
 name = "lock_api"
 version = "0.4.11"
@@ -771,6 +873,24 @@ version = "2.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "523dc4f511e55ab87b694dc30d0f820d60906ef06413f93d4d7a1385599cc149"
 
+[[package]]
+name = "memmap2"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "43a5a03cefb0d953ec0be133036f14e109412fa594edc2f77227249db66cc3ed"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "memmap2"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fe751422e4a8caa417e13c3ea66452215d7d63e19e604f4980461212f3ae1322"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "memoffset"
 version = "0.9.0"
@@ -852,7 +972,7 @@ version = "0.17.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "35be456fc620e61f62dff7ff70fbd54dcbaf0a4b920c0f16de1107c47d921d48"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "gio",
  "glib",
  "libc",
@@ -916,13 +1036,27 @@ version = "0.17.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06e4b0d3d1312775e782c86c91a111aa1f910cbb65e1337f9975b5f9a554b5e1"
 dependencies = [
- "bitflags",
+ "bitflags 1.3.2",
  "crc32fast",
  "fdeflate",
  "flate2",
  "miniz_oxide",
 ]
 
+[[package]]
+name = "polling"
+version = "3.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24f040dee2588b4963afb4e420540439d126f73fdacf4a9c486a96d840bac3c9"
+dependencies = [
+ "cfg-if",
+ "concurrent-queue",
+ "pin-project-lite",
+ "rustix",
+ "tracing",
+ "windows-sys",
+]
+
 [[package]]
 name = "proc-macro-crate"
 version = "1.3.1"
@@ -975,6 +1109,15 @@ dependencies = [
  "bytemuck",
 ]
 
+[[package]]
+name = "quick-xml"
+version = "0.31.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1004a344b30a54e2ee58d66a71b32d2db2feb0a31f9a2d302bf0536f15de2a33"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.35"
@@ -1086,6 +1229,25 @@ dependencies = [
  "semver",
 ]
 
+[[package]]
+name = "rustix"
+version = "0.38.31"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6ea3e1a662af26cd7a3ba09c0297a31af215563ecf42817c98df621387f4e949"
+dependencies = [
+ "bitflags 2.4.2",
+ "errno",
+ "libc",
+ "linux-raw-sys",
+ "windows-sys",
+]
+
+[[package]]
+name = "scoped-tls"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e1cf6437eb19a8f4a6cc0f7dca544973b0b78843adbfeb3683d1a94a0024a294"
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
@@ -1148,6 +1310,34 @@ version = "1.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6ecd384b10a64542d77071bd64bd7b231f4ed5940fba55e98c3de13824cf3d7"
 
+[[package]]
+name = "smithay-client-toolkit"
+version = "0.18.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "922fd3eeab3bd820d76537ce8f582b1cf951eceb5475c28500c7457d9d17f53a"
+dependencies = [
+ "bitflags 2.4.2",
+ "bytemuck",
+ "calloop",
+ "calloop-wayland-source",
+ "cursor-icon",
+ "libc",
+ "log",
+ "memmap2 0.9.4",
+ "pkg-config",
+ "rustix",
+ "thiserror",
+ "wayland-backend",
+ "wayland-client",
+ "wayland-csd-frame",
+ "wayland-cursor",
+ "wayland-protocols",
+ "wayland-protocols-wlr",
+ "wayland-scanner",
+ "xkbcommon",
+ "xkeysym",
+]
+
 [[package]]
 name = "spin"
 version = "0.9.8"
@@ -1394,15 +1584,112 @@ version = "0.2.91"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4f186bd2dcf04330886ce82d6f33dd75a7bfcf69ecf5763b89fcde53b6ac9838"
 
+[[package]]
+name = "wayland-backend"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d50fa61ce90d76474c87f5fc002828d81b32677340112b4ef08079a9d459a40"
+dependencies = [
+ "cc",
+ "downcast-rs",
+ "rustix",
+ "scoped-tls",
+ "smallvec",
+ "wayland-sys",
+]
+
+[[package]]
+name = "wayland-client"
+version = "0.31.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "82fb96ee935c2cea6668ccb470fb7771f6215d1691746c2d896b447a00ad3f1f"
+dependencies = [
+ "bitflags 2.4.2",
+ "rustix",
+ "wayland-backend",
+ "wayland-scanner",
+]
+
+[[package]]
+name = "wayland-csd-frame"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "625c5029dbd43d25e6aa9615e88b829a5cad13b2819c4ae129fdbb7c31ab4c7e"
+dependencies = [
+ "bitflags 2.4.2",
+ "cursor-icon",
+ "wayland-backend",
+]
+
+[[package]]
+name = "wayland-cursor"
+version = "0.31.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "71ce5fa868dd13d11a0d04c5e2e65726d0897be8de247c0c5a65886e283231ba"
+dependencies = [
+ "rustix",
+ "wayland-client",
+ "xcursor",
+]
+
+[[package]]
+name = "wayland-protocols"
+version = "0.31.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f81f365b8b4a97f422ac0e8737c438024b5951734506b0e1d775c73030561f4"
+dependencies = [
+ "bitflags 2.4.2",
+ "wayland-backend",
+ "wayland-client",
+ "wayland-scanner",
+]
+
+[[package]]
+name = "wayland-protocols-wlr"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad1f61b76b6c2d8742e10f9ba5c3737f6530b4c243132c2a2ccc8aa96fe25cd6"
+dependencies = [
+ "bitflags 2.4.2",
+ "wayland-backend",
+ "wayland-client",
+ "wayland-protocols",
+ "wayland-scanner",
+]
+
+[[package]]
+name = "wayland-scanner"
+version = "0.31.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "63b3a62929287001986fb58c789dce9b67604a397c15c611ad9f747300b6c283"
+dependencies = [
+ "proc-macro2",
+ "quick-xml",
+ "quote",
+]
+
+[[package]]
+name = "wayland-sys"
+version = "0.31.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15a0c8eaff5216d07f226cb7a549159267f3467b289d9a2e52fd3ef5aae2b7af"
+dependencies = [
+ "dlib",
+ "log",
+ "pkg-config",
+]
+
 [[package]]
 name = "waywrite"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
  "image",
  "ocrs",
  "relm4",
  "rten",
  "rten-tensor",
+ "smithay-client-toolkit",
 ]
 
 [[package]]
@@ -1433,6 +1720,72 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows-sys"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7dd37b7e5ab9018759f893a1952c9420d060016fc19a472b4bb20d1bdd694d1b"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bcf46cf4c365c6f2d1cc93ce535f2c8b244591df96ceee75d8e83deb70a9cac9"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da9f259dd3bcf6990b55bffd094c4f7235817ba4ceebde8e6d11cd0c5633b675"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b474d8268f99e0995f25b9f095bc7434632601028cf86590aea5c8a5cb7801d3"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1515e9a29e5bed743cb4415a9ecf5dfca648ce85ee42e15873c3cd8610ff8e02"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5eee091590e89cc02ad514ffe3ead9eb6b660aedca2183455434b93546371a03"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77ca79f2451b49fa9e2af39f0747fe999fcda4f5e241b2898624dca97a1f2177"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32b752e52a2da0ddfbdbcc6fceadfeede4c939ed16d13e648833a61dfb611ed8"
+
 [[package]]
 name = "winnow"
 version = "0.5.40"
@@ -1451,6 +1804,32 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "xcursor"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6a0ccd7b4a5345edfcd0c3535718a4e9ff7798ffc536bb5b5a0e26ff84732911"
+
+[[package]]
+name = "xkbcommon"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "13867d259930edc7091a6c41b4ce6eee464328c6ff9659b7e4c668ca20d4c91e"
+dependencies = [
+ "libc",
+ "memmap2 0.8.0",
+ "xkeysym",
+]
+
+[[package]]
+name = "xkeysym"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "054a8e68b76250b253f671d1268cb7f1ae089ec35e195b2efb2a4e9a836d0621"
+dependencies = [
+ "bytemuck",
+]
+
 [[package]]
 name = "zune-inflate"
 version = "0.2.54"
diff --git a/Cargo.toml b/Cargo.toml
index d458f11..f936e04 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,3 +11,5 @@ rten-tensor = "0.3.*"
 rten = "0.3.1"
 ocrs = "0.4.*"
 image = "0.24.9"
+anyhow = "1.0.81"
+smithay-client-toolkit = "0.18.1"
diff --git a/src/wayland.rs b/src/wayland.rs
new file mode 100644
index 0000000..63af819
--- /dev/null
+++ b/src/wayland.rs
@@ -0,0 +1,283 @@
+use smithay_client_toolkit::reexports::calloop::{EventLoop, LoopHandle}; use smithay_client_toolkit::reexports::calloop_wayland_source::WaylandSource;
+use smithay_client_toolkit::{
+    activation::{ActivationState, ActivationHandler, RequestData},
+    compositor::{CompositorState, CompositorHandler},
+    output::{OutputHandler, OutputState},
+    registry::{RegistryState, ProvidesRegistryState},
+    registry_handlers,
+    seat::{SeatState, SeatHandler, Capability},
+    shell::{
+        xdg::{
+            window::{WindowHandler, Window, WindowConfigure, WindowDecorations},
+            XdgShell,
+        },
+        WaylandSurface,
+    },
+    shm::{
+        slot::{SlotPool, Buffer},
+        Shm, ShmHandler
+    },
+    delegate_registry, delegate_compositor, delegate_seat, delegate_output,
+    delegate_xdg_shell, delegate_shm, delegate_activation, delegate_xdg_window
+};
+
+use wayland_client::{
+    Connection, QueueHandle,
+    globals::registry_queue_init,
+    protocol::{wl_surface, wl_output, wl_seat, wl_shm},
+};
+
+use std::time::Duration;
+
+use anyhow::Result;
+
+const WINDOW_HEIGHT: u32 = 256;
+const WINDOW_WIDTH: u32 = 512;
+
+fn main() -> Result<()> {
+    let conn = Connection::connect_to_env()?;
+
+    let (globals, event_queue) = registry_queue_init(&conn)?;
+    let qh = event_queue.handle();
+    let mut event_loop: EventLoop::<SimpleWindow> =
+        EventLoop::try_new()?;
+    let loop_handle = event_loop.handle();
+    WaylandSource::new(conn.clone(), event_queue).insert(loop_handle)?;
+
+    let compositor = CompositorState::bind(&globals, &qh)?;
+    let xdg_shell = XdgShell::bind(&globals, &qh)?;
+    let shm = Shm::bind(&globals, &qh)?;
+    let _xdg_activation = ActivationState::bind(&globals, &qh).ok();
+
+    let surface = compositor.create_surface(&qh);
+    let window = xdg_shell.create_window(surface, WindowDecorations::RequestServer, &qh);
+
+    window.set_title("A window");
+    window.set_app_id("simmer.simplewindow");
+    window.set_min_size(Some((WINDOW_WIDTH, WINDOW_HEIGHT)));
+    window.set_max_size(Some((WINDOW_WIDTH, WINDOW_HEIGHT)));
+
+    window.commit();
+
+    let pool = SlotPool::new((WINDOW_WIDTH as usize) * (WINDOW_HEIGHT as usize) * 4, &shm)?;
+
+    let mut simple_window = SimpleWindow {
+        registry_state: RegistryState::new(&globals),
+        seat_state: SeatState::new(&globals, &qh),
+        output_state: OutputState::new(&globals, &qh),
+        shm,
+        buffer: None,
+        pool,
+        window,
+        width: WINDOW_WIDTH,
+        height: WINDOW_HEIGHT,
+        exit: false,
+        first_configure: true,
+        _loop_handle: event_loop.handle(),
+    };
+
+    loop {
+        event_loop.dispatch(Duration::from_millis(16), &mut simple_window)?;
+
+        if simple_window.exit {
+            println!("exiting");
+            break;
+        }
+    }
+
+
+    Ok(())
+}
+
+struct SimpleWindow {
+    registry_state: RegistryState,
+    seat_state: SeatState,
+    output_state: OutputState,
+    shm: Shm,
+    buffer: Option<Buffer>,
+    pool: SlotPool,
+    window: Window,
+    width: u32,
+    height: u32,
+    exit: bool,
+    first_configure: bool,
+    _loop_handle: LoopHandle<'static, SimpleWindow>
+}
+
+impl CompositorHandler for SimpleWindow {
+    fn scale_factor_changed(
+        &mut self,
+        _: &Connection,
+        _: &QueueHandle<Self>,
+        _: &wl_surface::WlSurface,
+        _: i32) {}
+    fn transform_changed(
+        &mut self,
+        _: &Connection,
+        _: &QueueHandle<Self>,
+        _: &wl_surface::WlSurface,
+        _: wl_output::Transform) {}
+    fn frame(
+        &mut self,
+        conn: &Connection,
+        qh: &QueueHandle<Self>,
+        _: &wl_surface::WlSurface,
+        _: u32
+        ) {
+        self.draw(conn, qh);
+    }
+}
+
+impl SeatHandler for SimpleWindow {
+    fn seat_state(&mut self) -> &mut SeatState {
+        &mut self.seat_state
+    }
+    fn new_seat(
+        &mut self,
+        _: &Connection,
+        _: &QueueHandle<Self>,
+        _: wl_seat::WlSeat
+        ) {}
+    fn new_capability(
+        &mut self,
+        _: &Connection,
+        _: &QueueHandle<Self>,
+        _: wl_seat::WlSeat,
+        _: Capability,
+        ) {}
+    fn remove_capability(
+        &mut self,
+        _: &Connection,
+        _: &QueueHandle<Self>,
+        _: wl_seat::WlSeat,
+        _: Capability,
+        ) {}
+    fn remove_seat(
+        &mut self,
+        _: &Connection,
+        _: &QueueHandle<Self>,
+        _: wl_seat::WlSeat,
+        ) {}
+}
+
+impl OutputHandler for SimpleWindow {
+    fn output_state(&mut self) -> &mut OutputState {
+        &mut self.output_state
+    }
+    fn new_output(
+        &mut self,
+        _: &Connection,
+        _: &QueueHandle<Self>,
+        _: wl_output::WlOutput,
+        ) {}
+    fn update_output(
+        &mut self,
+        _: &Connection,
+        _: &QueueHandle<Self>,
+        _: wl_output::WlOutput,
+        ) {}
+    fn output_destroyed(
+        &mut self,
+        _: &Connection,
+        _: &QueueHandle<Self>,
+        _: wl_output::WlOutput,
+        ) {}
+}
+
+impl WindowHandler for SimpleWindow {
+    fn request_close(
+        &mut self,
+        _: &Connection,
+        _: &QueueHandle<Self>,
+        _: &Window
+        ) {
+            self.exit = true;
+    }
+
+    fn configure(
+        &mut self,
+        conn: &Connection,
+        qh: &QueueHandle<Self>,
+        _: &Window,
+        _: WindowConfigure,
+        _: u32,
+        ) {
+        if self.first_configure {
+            self.first_configure = false;
+            self.draw(conn, qh);
+        }
+    }
+}
+
+impl ShmHandler for SimpleWindow {
+    fn shm_state(&mut self) -> &mut Shm {
+        &mut self.shm
+    }
+}
+
+impl ActivationHandler for SimpleWindow {
+    type RequestData = RequestData;
+
+    fn new_token(&mut self, _: String, _: &Self::RequestData) {}
+}
+
+impl SimpleWindow {
+    fn draw(&mut self, _: &Connection, qh: &QueueHandle<Self>) {
+        let buffer = self.buffer.get_or_insert_with(|| {
+            self.pool
+                .create_buffer(self.width as i32, self.height as i32, (self.width as i32) * 4, wl_shm::Format::Argb8888)
+                .expect("create buffer")
+                .0
+        });
+
+        let canvas = match self.pool.canvas(buffer) {
+            Some(canvas) => canvas,
+            None => {
+                let (second_buffer, canvas) = self
+                    .pool
+                    .create_buffer(
+                        self.width as i32,
+                        self.height as i32,
+                        (self.width as i32) * 4,
+                        wl_shm::Format::Argb8888,
+                        )
+                    .expect("create buffer");
+                *buffer = second_buffer;
+                canvas
+            }
+        };
+
+        for pix in canvas.chunks_exact_mut(4) {
+
+            let color: i32 = (255 << 24) + (255 << 16) + (0 << 8) + 0;
+            
+            let array: &mut [u8; 4] = pix.try_into().unwrap();
+            *array = color.to_le_bytes();
+        }
+
+        self.window.wl_surface().damage_buffer(0, 0, self.width as i32, self.height as i32);
+        self.window.wl_surface().frame(qh, self.window.wl_surface().clone());
+        buffer.attach_to(self.window.wl_surface()).expect("buffer attach");
+        self.window.commit();
+
+    }
+}
+
+delegate_compositor!(SimpleWindow);
+delegate_output!(SimpleWindow);
+delegate_shm!(SimpleWindow);
+
+delegate_seat!(SimpleWindow);
+
+delegate_xdg_shell!(SimpleWindow);
+delegate_xdg_window!(SimpleWindow);
+delegate_activation!(SimpleWindow);
+
+delegate_registry!(SimpleWindow);
+
+impl ProvidesRegistryState for SimpleWindow {
+    fn registry(&mut self) -> &mut RegistryState {
+        &mut self.registry_state
+    }
+    registry_handlers![OutputState, SeatState,];
+}