feat: ghostty-style custom shaders over the window

Cargo.toml

@@ -45,6 +45,8 @@ harness = false
 gpui_platform = { package = "gpui-pre-platform", version = "=0.3.8", features = ["test-support"] }
 gpui = { package = "gpui-pre", version = "=0.3.8", features = ["test-support"] }
 gpui-shell = { path = "vendor/gpui-kit/crates/shell", features = ["render-test-support"] }
+# Checks that custom shaders (src/shaders.rs) are GLSL the backends accept.
+naga = { version = "29", features = ["glsl-in"] }
 
 [target.'cfg(target_os = "linux")'.dev-dependencies]
 gpui_wgpu = { package = "gpui-pre-wgpu", path = "vendor/gpui-pre-wgpu", features = ["test-support"] }

THIRD-PARTY-NOTICES

@@ -2,8 +2,8 @@ Herdr third-party notices
 =========================
 Regenerate with just notices. See licenses/README.md.
 
-Input-SHA256: 6a3b4177337bfb82680d2992e24b5f948c0c4ce524bafa5b1c8cf8090f45adba Cargo.lock
-Input-SHA256: f3a083f960c5b2778ddb4b40d9fd2e6c9e29ede57f2f28a46b48d99f0dd485e1 Cargo.toml
+Input-SHA256: 46141ef4ba518bbe2cda84770b98405b3f699a460fd0c7b40bb4dd574a678188 Cargo.lock
+Input-SHA256: 32c32392fc94dca20fd5a6c6f529c4b16b28053a9a13bacfe6bc099948773377 Cargo.toml
 Input-SHA256: c71d239df91726fc519c6eb72d318ec65820627232b2f796219e87dcf35d0ab4 LICENSE
 Input-SHA256: e58cb0de2dde300bcda769ca993fde2737f42c0274082f038621ab22975a49e2 about.toml
 Input-SHA256: 84a7a98c82140fb12c37fe42b93805baa16024cb3e5acc599b7ffe612c55d847 assets/fonts/LICENSE-SymbolsNerdFont.txt
@@ -56,7 +56,7 @@ Input-SHA256: 81001a9f6c3d868140e0c7c66abcbff8deb4dc00e0fbb68d4a2506d2e2385ea8 v
 Input-SHA256: 2ca4d3969f5a62ea841f25868efe6a4c38866f244caffc0affa4af1b25400dad vendor/gpui-kit/crates/fps/Cargo.toml
 Input-SHA256: 643a0dbfd9207840764607afbd0cf163b07a16ae4a48266f5cb31efe64b1b2ac vendor/gpui-kit/crates/shell/Cargo.toml
 Input-SHA256: cd6a0e1b53913eb4f2559b79aae3b7877b41e9c559c56a0231501cbd0fe2ad3a vendor/gpui-kit/crates/shell/rquickjs-compat/Cargo.toml
-Input-SHA256: f00df50e0e437e56cd8475bc78289f57ef00e5d0af0a1a056bf215438bfe5529 vendor/gpui-pre-apple/Cargo.toml
+Input-SHA256: 1d6e4db26751645eb9891626614a6f6ec3d332230c4f56571bd4f78b07e40bf8 vendor/gpui-pre-apple/Cargo.toml
 Input-SHA256: 752daf2fb234ca4a1fa372c073fe127f44b7b90fd2529ae44273a64f9d53da7a vendor/gpui-pre-apple/LICENSE-APACHE
 Input-SHA256: 0d4ca250457a2343879236779f72d4a2dbc1dbdb5fc9fec23d59152cce63caf1 vendor/gpui-pre-linux/Cargo.toml
 Input-SHA256: 752daf2fb234ca4a1fa372c073fe127f44b7b90fd2529ae44273a64f9d53da7a vendor/gpui-pre-linux/LICENSE-APACHE
@@ -12840,6 +12840,41 @@ OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 
+----------------------------------------------------------------------
+BSD 3-Clause "New" or "Revised" License (BSD-3-Clause)
+  pp-rs 0.2.1 — https://github.com/Kangz/glslpp-rs
+
+BSD 3-Clause License
+
+Copyright (c) 2020, Corentin Wallez
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+3. Neither the name of the copyright holder nor the names of its
+   contributors may be used to endorse or promote products derived from
+   this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
 ----------------------------------------------------------------------
 BSD 3-Clause "New" or "Revised" License (BSD-3-Clause)
   tiny-skia-path 0.11.4 — https://github.com/RazrFalcon/tiny-skia/tree/master/path

defaults/AGENTS.md

@@ -265,6 +265,16 @@ Properties any node can have:
   then show the desktop through frosted glass: make `background` and
   `canvas` transparent and give the sidebar a translucent `chrome`
   (`"#0b102466"`). Nodes with solid colors stay solid.
+- Root only: `"shaders": ["shaders/glow.glsl", ...]` runs Ghostty-style custom
+  shaders over the whole window after every frame, in order (macOS for now;
+  paths from this folder, `~/` from home; edits reload). Each is a Shadertoy
+  `void mainImage(out vec4 fragColor, in vec2 fragCoord)` that reads the frame
+  from `iChannel0`, with Ghostty's uniforms: `iResolution`, `iTime`,
+  `iCurrentCursor` / `iPreviousCursor` (the focused terminal's cursor cell,
+  from the bottom left) and `iTimeCursorChange`, `iCurrentCursorColor`,
+  `iFocus` / `iTimeFocus`, `iPalette[256]`, `iBackgroundColor`, ... So a
+  Ghostty `custom-shader` file works as is. Frames keep coming while the window
+  has focus. A shader that doesn't compile shows why and none run.
 - Root only: `"preview": "layouts/<name>.svg"` (or png): the picture the
   settings screen shows for this layout. Draw one when you make a layout;
   without it the person sees a plain frame. New layouts and `themes/*.json`

src/layout.rs

@@ -397,6 +397,10 @@ pub struct Node {
     /// colors with alpha show the desktop through frosted glass.
     #[serde(default, skip_serializing_if = "is_false")]
     pub window_blur: bool,
+    /// Root only: Ghostty-style custom shaders run over the whole window after
+    /// every frame, in order (paths relative to the app's folder, `~` for home).
+    #[serde(default, skip_serializing_if = "Vec::is_empty")]
+    pub shaders: Vec<String>,
 }
 
 #[derive(Clone, Copy, Debug, PartialEq, Eq)]
@@ -436,6 +440,7 @@ impl Node {
             toast: None,
             window_drag: false,
             window_blur: false,
+            shaders: Vec::new(),
         }
     }
 

src/main.rs

@@ -28,6 +28,7 @@ mod process_cwd;
 mod programs;
 mod remote_shell;
 mod settings;
+mod shaders;
 mod setup;
 mod sound;
 mod spawn;