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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 dom::bindings::codegen::Bindings::ImageDataBinding;
use dom::bindings::codegen::Bindings::ImageDataBinding::ImageDataMethods;
use dom::bindings::global::GlobalRef;
use dom::bindings::js::{JSRef, Temporary};
use dom::bindings::utils::{Reflector, reflect_dom_object};
use euclid::size::Size2D;
use js::jsapi::{JSContext, JSObject};
use js::jsfriendapi::bindgen::{JS_NewUint8ClampedArray, JS_GetUint8ClampedArrayData};
use libc::uint8_t;
use std::vec::Vec;
use std::slice;
use std::ptr;
#[dom_struct]
#[allow(raw_pointer_derive)]
pub struct ImageData {
reflector_: Reflector,
width: u32,
height: u32,
data: *mut JSObject,
}
impl ImageData {
#[allow(unsafe_code)]
fn new_inherited(width: u32, height: u32, data: Option<Vec<u8>>, global: GlobalRef) -> ImageData {
unsafe {
let cx = global.get_cx();
let js_object: *mut JSObject = JS_NewUint8ClampedArray(cx, width * height * 4);
if let Some(vec) = data {
let js_object_data: *mut uint8_t = JS_GetUint8ClampedArrayData(js_object, cx);
ptr::copy_nonoverlapping(vec.as_ptr(), js_object_data, vec.len())
}
ImageData {
reflector_: Reflector::new(),
width: width,
height: height,
data: js_object,
}
}
}
pub fn new(global: GlobalRef, width: u32, height: u32, data: Option<Vec<u8>>) -> Temporary<ImageData> {
reflect_dom_object(box ImageData::new_inherited(width, height, data, global),
global, ImageDataBinding::Wrap)
}
}
pub trait ImageDataHelpers {
fn get_data_array(self, global: &GlobalRef) -> Vec<u8>;
fn get_size(&self) -> Size2D<i32>;
}
impl<'a> ImageDataHelpers for JSRef<'a, ImageData> {
#[allow(unsafe_code)]
fn get_data_array(self, global: &GlobalRef) -> Vec<u8> {
unsafe {
let cx = global.get_cx();
let data: *const uint8_t = JS_GetUint8ClampedArrayData(self.Data(cx), cx) as *const uint8_t;
let len = self.Width() * self.Height() * 4;
slice::from_raw_parts(data, len as usize).to_vec()
}
}
fn get_size(&self) -> Size2D<i32> {
Size2D::new(self.Width() as i32, self.Height() as i32)
}
}
impl<'a> ImageDataMethods for JSRef<'a, 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
}
// https://html.spec.whatwg.org/multipage/#dom-imagedata-data
fn Data(self, _: *mut JSContext) -> *mut JSObject {
self.data
}
}
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