Function bgr_to_u32

rustcv-camera/examples/resolution_bench.rs:143–150

Convert BGR byte slice to u32 display buffer (0x00RRGGBB). 将 BGR 字节切片转换为 u32 显示缓冲区（0x00RRGGBB）。

(bgr: &[u8], buf: &mut [u32])

/// Convert BGR byte slice to u32 display buffer (0x00RRGGBB).
/// 将 BGR 字节切片转换为 u32 显示缓冲区（0x00RRGGBB）。
fn bgr_to_u32(bgr: &[u8], buf: &mut [u32]) {
    for (pixel, chunk) in buf.iter_mut().zip(bgr.chunks_exact(3)) {
        let b = chunk[0] as u32;
        let g = chunk[1] as u32;
        let r = chunk[2] as u32;
        *pixel = (r << 16) | (g << 8) | b;
    }
}

/// Draw FPS and resolution label overlay.
/// 绘制 FPS 和分辨率标签叠加。