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October 14, 2019 18:41
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#[wasm_bindgen] | |
pub extern fn handle_mouse_down(img_width: u32, img_height: u32, canvas_width: u32, canvas_height: u32, x: u32, y: u32, img_vec: Vec<u8>) | |
-> Vec<u8> | |
{ | |
utils::set_panic_hook(); | |
log!("INSIDE HANDLE_MOUSE_DOWN"); | |
log!("inside handle_mouse_down and x: {:?}, and y: {:?}", x, y); | |
log!("1"); | |
let mutex_var = &ID_TO_DATA; | |
log!("2"); | |
let mut guard_var = mutex_var.lock().unwrap(); | |
log!("3"); | |
let mut pic = Picture::new(canvas_width, canvas_height, vec![0; 4 * canvas_width as usize * canvas_height as usize]); | |
let img_vec_guard: Vec<u8> = img_vec.clone(); | |
let mut prev_storage: Vec<u8>; | |
let mut return_buffer = vec![0; 4 * canvas_width as usize * canvas_height as usize]; | |
if guard_var.len() == 0 { | |
let z: u32 = x + y; | |
guard_var.insert(0, Data{ | |
canvas_vec: vec![0; 4 * canvas_width as usize * canvas_height as usize], | |
img_vec: img_vec_guard | |
}); | |
}else{ | |
let (key, value) = guard_var.iter().last().unwrap(); | |
prev_storage = value.canvas_vec.clone() | |
.iter() | |
.map(|n| u8::from(*n)) | |
.collect(); | |
pic = Picture::new(canvas_width, canvas_height, prev_storage); | |
pic.add_img_vec(img_width, img_height, canvas_width, canvas_height, x, y, img_vec); | |
return_buffer = pic.clone().buffer.into_raw(); | |
guard_var.insert(0, Data{ | |
canvas_vec: pic.buffer.into_raw(), | |
img_vec: img_vec_guard | |
}); | |
} | |
std::mem::drop(guard_var); | |
log!("guard_var has been dropped~"); | |
return return_buffer; | |
} |
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