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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use core::nonzero::NonZero;
use dom::bindings::codegen::Bindings::ImageDataBinding;
use dom::bindings::codegen::Bindings::ImageDataBinding::ImageDataMethods;
use dom::bindings::js::Root;
use dom::bindings::reflector::{Reflector, reflect_dom_object};
use dom::globalscope::GlobalScope;
use euclid::size::Size2D;
use js::jsapi::{Heap, JSContext, JSObject};
use js::rust::Runtime;
use js::typedarray::Uint8ClampedArray;
use std::default::Default;
use std::ptr;
use std::vec::Vec;
#[dom_struct]
pub struct ImageData {
reflector_: Reflector,
width: u32,
height: u32,
data: Heap<*mut JSObject>,
}
impl ImageData {
#[allow(unsafe_code)]
pub fn new(global: &GlobalScope, width: u32, height: u32, data: Option<Vec<u8>>) -> Root<ImageData> {
let imagedata = box ImageData {
reflector_: Reflector::new(),
width: width,
height: height,
data: Heap::default(),
};
unsafe {
let cx = global.get_cx();
rooted!(in (cx) let mut js_object = ptr::null_mut());
let data = data.as_ref().map(|d| &d[..]);
Uint8ClampedArray::create(cx, width * height * 4, data, js_object.handle_mut()).unwrap();
(*imagedata).data.set(js_object.get());
}
reflect_dom_object(imagedata,
global, ImageDataBinding::Wrap)
}
#[allow(unsafe_code)]
pub fn get_data_array(&self) -> Vec<u8> {
unsafe {
assert!(!self.data.get().is_null());
let cx = Runtime::get();
assert!(!cx.is_null());
typedarray!(in(cx) let array: Uint8ClampedArray = self.data.get());
let vec = array.unwrap().as_slice().to_vec();
vec
}
}
pub fn get_size(&self) -> Size2D<i32> {
Size2D::new(self.Width() as i32, self.Height() as i32)
}
}
impl ImageDataMethods for ImageData {
// https://html.spec.whatwg.org/multipage/#dom-imagedata-width
fn Width(&self) -> u32 {
self.width
}
// https://html.spec.whatwg.org/multipage/#dom-imagedata-height
fn Height(&self) -> u32 {
self.height
}
#[allow(unsafe_code)]
// https://html.spec.whatwg.org/multipage/#dom-imagedata-data
unsafe fn Data(&self, _: *mut JSContext) -> NonZero<*mut JSObject> {
assert!(!self.data.get().is_null());
NonZero::new(self.data.get())
}
}
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