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webgl: texImage2D with a canvas argument

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This commit is contained in:
Emilio Cobos Álvarez 2015-09-19 17:32:50 +02:00
parent a58e731abd
commit e2b7a01055
5 changed files with 78 additions and 71 deletions
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36
components/script/dom/htmlcanvaselement.rs
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@ -2,7 +2,7 @@
* 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 canvas_traits::CanvasMsg;
use canvas_traits::{CanvasMsg, FromLayoutMsg};
use dom::attr::Attr;
use dom::bindings::codegen::Bindings::HTMLCanvasElementBinding;
use dom::bindings::codegen::Bindings::HTMLCanvasElementBinding::HTMLCanvasElementMethods;
@ -22,7 +22,7 @@ use dom::node::{Node, NodeTypeId, window_from_node};
use dom::virtualmethods::VirtualMethods;
use dom::webglrenderingcontext::{LayoutCanvasWebGLRenderingContextHelpers, WebGLRenderingContext};
use euclid::size::Size2D;
use ipc_channel::ipc::IpcSender;
use ipc_channel::ipc::{self, IpcSender};
use js::jsapi::{HandleValue, JSContext};
use offscreen_gl_context::GLContextAttributes;
use std::cell::Cell;
@ -150,6 +150,17 @@ impl LayoutHTMLCanvasElementHelpers for LayoutJS<HTMLCanvasElement> {
impl HTMLCanvasElement {
pub fn ipc_renderer(&self) -> Option<IpcSender<CanvasMsg>> {
if let Some(context) = self.context.get() {
match context {
CanvasContext::Context2d(context) => Some(context.root().r().ipc_renderer()),
CanvasContext::WebGL(context) => Some(context.root().r().ipc_renderer()),
}
} else {
None
}
}
pub fn get_or_init_2d_context(&self) -> Option<Root<CanvasRenderingContext2D>> {
if self.context.get().is_none() {
let window = window_from_node(self);
@ -200,6 +211,27 @@ impl HTMLCanvasElement {
pub fn is_valid(&self) -> bool {
self.height.get() != 0 && self.width.get() != 0
}
pub fn fetch_all_data(&self) -> Option<(Vec<u8>, Size2D<i32>)> {
let size = self.get_size();
if size.width == 0 || size.height == 0 {
return None
}
let renderer = match self.ipc_renderer() {
Some(renderer) => renderer,
None => return None,
};
let (sender, receiver) = ipc::channel().unwrap();
let msg = CanvasMsg::FromLayout(FromLayoutMsg::SendPixelContents(sender));
renderer.send(msg).unwrap();
let data = receiver.recv().unwrap().to_vec();
Some((data, size))
}
}
impl HTMLCanvasElementMethods for HTMLCanvasElement {