select: add --no-outline to hide selection border

src/ocr.rs

@@ -0,0 +1,32 @@
+//! OCR via libtesseract (dynamic link, gated by the `ocr` cargo feature).
+//!
+//! `leptess` wraps `tesseract-sys` (bindgen-generated bindings to libtesseract +
+//! libleptonica). At build time bindgen reads /usr/include/tesseract/*.h and emits
+//! the Rust extern declarations; at runtime we dynamic-link against
+//! `libtesseract.so` / `libleptonica.so` already present on the system.
+
+use image::DynamicImage;
+use leptess::LepTess;
+
+use crate::error::{BlastError, Result};
+use crate::shhh::encode_png;
+
+/// Run OCR on `img` using the given language tag (e.g. "eng", "eng+deu").
+/// Returns the recognized text with trailing whitespace trimmed.
+///
+/// leptess only exposes `set_image_from_mem` (decodes via leptonica), so we
+/// round-trip through PNG. Re-encoding is cheap relative to OCR runtime.
+pub fn recognize(img: &DynamicImage, language: &str) -> Result<String> {
+    let mut lt = LepTess::new(None, language)
+        .map_err(|e| BlastError::Other(format!("tesseract init: {e}")))?;
+
+    let png = encode_png(img).map_err(|e| BlastError::Image(e.to_string()))?;
+    lt.set_image_from_mem(&png)
+        .map_err(|e| BlastError::Other(format!("tesseract set_image: {e}")))?;
+
+    let text = lt
+        .get_utf8_text()
+        .map_err(|e| BlastError::Other(format!("tesseract recognize: {e}")))?;
+
+    Ok(text.trim().to_string())
+}