INNER CODE UNIT · Rust

nativeDecodeNextFrame

FooIbar/EhViewer · app/src/main/rust/src/ffi/android.rs:36

pub fn nativeDecodeNextFrame(
    mut env: JNIEnv,
    _: JClass,
    decoder: jlong,
    reset: jboolean,
    bitmap: jobject,
) -> jint {
    jni_throwing(&mut env, |env| {
        let dec = decoder as *mut WebPAnimDecoder;
        let (buf, timestamp) = unsafe { decode_next_frame(dec, reset != 0) };
        if !buf.is_null() {
            let info = unsafe { get_image_info(dec) };
            let handle = unsafe { Bitmap::from_jni(env.get_raw(), bitmap) };
            let dst = handle.lock_pixels()? as *mut u8;
            let size = info.canvas_width * info.canvas_height * 4;
            unsafe { copy_nonoverlapping(buf, dst, size as usize) };
            handle.unlock_pixels()?;
        }

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