Added experimental support for DEC Sixel using sixel_bytes.

Cargo.toml

@@ -8,6 +8,7 @@ libc = "0.2"
 unicode-width = "0.1.10"
 unicode-segmentation = "1.10.0"
 chrono = "0.4.23"
+sixel-bytes = "0.2"
 
 [lib]
 name = "carbonyl"

build.rs

@@ -12,8 +12,14 @@ fn link_sysroot() {
             "cargo:rustc-link-arg=--sysroot=./chromium/src/build/linux/debian_bullseye_amd64-sysroot"
         );
     } else {
-        println!("cargo:warning={}", "x86_64 debian sysroot provided by chromium was not found!");
-        println!("cargo:warning={}", "carbonyl may fail to link against a proper libc!");
+        println!(
+            "cargo:warning={}",
+            "x86_64 debian sysroot provided by chromium was not found!"
+        );
+        println!(
+            "cargo:warning={}",
+            "carbonyl may fail to link against a proper libc!"
+        );
     }
 }
 
@@ -29,8 +35,14 @@ fn link_sysroot() {
             "cargo:rustc-link-arg=--sysroot=./chromium/src/build/linux/debian_bullseye_i386-sysroot"
         );
     } else {
-        println!("cargo:warning={}", "x86 debian sysroot provided by chromium was not found!");
-        println!("cargo:warning={}", "carbonyl may fail to link against a proper libc!");
+        println!(
+            "cargo:warning={}",
+            "x86 debian sysroot provided by chromium was not found!"
+        );
+        println!(
+            "cargo:warning={}",
+            "carbonyl may fail to link against a proper libc!"
+        );
     }
 }
 

readme.md

@@ -67,6 +67,10 @@ $ carbonyl https://github.com
   </tbody>
 </table>
 
+## Rendering
+
+Carbonyl now prefers Sixel graphics for page rendering whenever the terminal reports support. Legacy character-based rendering is automatically used as a fallback if Sixel frames cannot be sent. Sixel scrolling is enabled by default so web content can be browsed normally; set `CARBONYL_SIXEL_SCROLL=off` (or `0`) to opt back into the legacy non-scrolling behaviour.
+
 ## Known issues
 
 - Fullscreen mode not supported yet

scripts/python3

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+exec "$HOME/carbonyl/chromium/depot_tools/vpython3" "$@"

src/browser/bridge.rs

@@ -187,12 +187,15 @@ pub extern "C" fn carbonyl_renderer_resize(bridge: RendererPtr) {
     let mut bridge = bridge.unwrap().lock().unwrap();
     let window = bridge.window.update();
     let cells = window.cells.clone();
+    // Use the full terminal pixel geometry for SIXEL frames.
+    let geometry = window.graphics_px;
 
     log::debug!("resizing renderer, terminal window: {:?}", window);
 
-    bridge
-        .renderer
-        .render(move |renderer| renderer.set_size(cells));
+    bridge.renderer.render(move |renderer| {
+        renderer.set_size(cells);
+        renderer.update_sixel_geometry(geometry);
+    });
 }
 
 #[no_mangle]
@@ -411,6 +414,11 @@ pub extern "C" fn carbonyl_renderer_listen(bridge: RendererPtr, delegate: *mut B
                         Terminal(terminal) => match terminal {
                             TerminalEvent::Name(name) => log::debug!("terminal name: {name}"),
                             TerminalEvent::TrueColorSupported => renderer.enable_true_color(),
+                            TerminalEvent::SixelSupported { .. } => {
+                                let geometry = bridge.lock().unwrap().window.graphics_px;
+
+                                renderer.enable_sixel(geometry)
+                            }
                         },
                     }
                 }