forked from mirrors/gecko-dev
bd3049eecd
Prior to #7416 and #7401, many of these `impl` sections were not identical Source-Repo: https://github.com/servo/servo Source-Revision: 2f227a034a12158e2592b645c061d92c87c8eba6
83 lines
2.6 KiB
Rust
83 lines
2.6 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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use dom::bindings::codegen::Bindings::ImageDataBinding;
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use dom::bindings::codegen::Bindings::ImageDataBinding::ImageDataMethods;
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use dom::bindings::global::GlobalRef;
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use dom::bindings::js::Root;
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use dom::bindings::utils::{Reflector, reflect_dom_object};
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use euclid::size::Size2D;
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use js::jsapi::{JSContext, JSObject, Heap};
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use js::jsapi::{JS_NewUint8ClampedArray, JS_GetUint8ClampedArrayData};
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use libc::uint8_t;
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use std::default::Default;
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use std::ptr;
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use std::slice;
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use std::vec::Vec;
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#[dom_struct]
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#[allow(raw_pointer_derive)]
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pub struct ImageData {
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reflector_: Reflector,
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width: u32,
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height: u32,
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data: Heap<*mut JSObject>,
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}
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impl ImageData {
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#[allow(unsafe_code)]
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pub fn new(global: GlobalRef, width: u32, height: u32, data: Option<Vec<u8>>) -> Root<ImageData> {
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let mut imagedata = box ImageData {
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reflector_: Reflector::new(),
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width: width,
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height: height,
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data: Heap::default(),
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};
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unsafe {
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let cx = global.get_cx();
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let js_object: *mut JSObject = JS_NewUint8ClampedArray(cx, width * height * 4);
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if let Some(vec) = data {
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let js_object_data: *mut uint8_t = JS_GetUint8ClampedArrayData(js_object, ptr::null());
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ptr::copy_nonoverlapping(vec.as_ptr(), js_object_data, vec.len())
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}
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(*imagedata).data.set(js_object);
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}
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reflect_dom_object(imagedata,
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global, ImageDataBinding::Wrap)
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}
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#[allow(unsafe_code)]
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pub fn get_data_array(&self, global: &GlobalRef) -> Vec<u8> {
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unsafe {
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let cx = global.get_cx();
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let data: *const uint8_t = JS_GetUint8ClampedArrayData(self.Data(cx), ptr::null()) as *const uint8_t;
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let len = self.Width() * self.Height() * 4;
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slice::from_raw_parts(data, len as usize).to_vec()
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}
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}
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pub fn get_size(&self) -> Size2D<i32> {
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Size2D::new(self.Width() as i32, self.Height() as i32)
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}
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}
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impl ImageDataMethods for ImageData {
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// https://html.spec.whatwg.org/multipage/#dom-imagedata-width
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fn Width(&self) -> u32 {
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self.width
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}
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// https://html.spec.whatwg.org/multipage/#dom-imagedata-height
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fn Height(&self) -> u32 {
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self.height
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}
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// https://html.spec.whatwg.org/multipage/#dom-imagedata-data
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fn Data(&self, _: *mut JSContext) -> *mut JSObject {
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self.data.get()
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}
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}
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