1 files changed, 71 insertions, 0 deletions
diff --git a/libs/nak/src/dxvk.rs b/libs/nak/src/dxvk.rs
new file mode 100644
index 0000000..97e4222
--- /dev/null
+++ b/libs/nak/src/dxvk.rs
@@ -0,0 +1,71 @@
+//! DXVK configuration management for Fluorine Manager.
+//!
+//! Downloads dxvk.conf from upstream, appends Fluorine-specific settings,
+//! and stores at `~/.var/app/com.fluorine.manager/config/dxvk.conf`.
+
+use std::error::Error;
+use std::fs;
+use std::path::{Path, PathBuf};
+
+use crate::logging::{log_info, log_warning};
+
+const DXVK_CONF_URL: &str =
+    "https://raw.githubusercontent.com/doitsujin/dxvk/master/dxvk.conf";
+
+const DXVK_CUSTOM_SETTINGS: &str = r#"
+# Fluorine Custom Settings
+# Disable Graphics Pipeline Library (can cause issues with modded games)
+dxvk.enableGraphicsPipelineLibrary = False
+"#;
+
+/// Get the path where the DXVK config will be stored.
+pub fn get_dxvk_conf_path() -> PathBuf {
+    let home = std::env::var("HOME").unwrap_or_else(|_| "/tmp".to_string());
+    PathBuf::from(home)
+        .join(".var/app/com.fluorine.manager/config/dxvk.conf")
+}
+
+/// Ensure the dxvk.conf file exists, downloading if necessary.
+///
+/// Returns the path to the config file.
+pub fn ensure_dxvk_conf() -> Result<PathBuf, Box<dyn Error>> {
+    let conf_path = get_dxvk_conf_path();
+
+    // If it already exists, return it
+    if conf_path.exists() {
+        return Ok(conf_path);
+    }
+
+    download_and_create_dxvk_conf(&conf_path)
+}
+
+/// Download the upstream dxvk.conf, append custom settings, and write to `dest`.
+pub fn download_and_create_dxvk_conf(dest: &Path) -> Result<PathBuf, Box<dyn Error>> {
+    // Ensure parent directory exists
+    if let Some(parent) = dest.parent() {
+        fs::create_dir_all(parent)?;
+    }
+
+    log_info("Downloading dxvk.conf from upstream...");
+
+    let upstream_content = match ureq::get(DXVK_CONF_URL).call() {
+        Ok(response) => {
+            let mut body = String::new();
+            response.into_reader().read_to_string(&mut body)?;
+            body
+        }
+        Err(e) => {
+            log_warning(&format!("Failed to download dxvk.conf: {}", e));
+            // Create with just custom settings if download fails
+            String::new()
+        }
+    };
+
+    let full_content = format!("{}\n{}", upstream_content, DXVK_CUSTOM_SETTINGS);
+    fs::write(dest, &full_content)?;
+
+    log_info(&format!("Created dxvk.conf at {:?}", dest));
+    Ok(dest.to_path_buf())
+}
+
+use std::io::Read as _;