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95a0d0584f
This allows to cleanup resources earlier if they stop being used. Right now all resources were cleaned up when the context was destroyed, this is a slightly better approach. We ignore the possible failure of the send() call, since we don't keep track of these resources from the `WebGLRenderingContext` structure, so a texture could be destroyed after the context and give us problems.
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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// https://www.khronos.org/registry/webgl/specs/latest/1.0/webgl.idl
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use canvas_traits::{CanvasMsg, CanvasWebGLMsg, WebGLError, WebGLResult};
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use dom::bindings::codegen::Bindings::WebGLBufferBinding;
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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::reflect_dom_object;
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use dom::webglobject::WebGLObject;
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use ipc_channel::ipc::{self, IpcSender};
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use std::cell::Cell;
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#[dom_struct]
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pub struct WebGLBuffer {
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webgl_object: WebGLObject,
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id: u32,
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/// The target to which this buffer was bound the first time
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target: Cell<Option<u32>>,
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is_deleted: Cell<bool>,
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#[ignore_heap_size_of = "Defined in ipc-channel"]
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renderer: IpcSender<CanvasMsg>,
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}
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impl WebGLBuffer {
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fn new_inherited(renderer: IpcSender<CanvasMsg>, id: u32) -> WebGLBuffer {
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WebGLBuffer {
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webgl_object: WebGLObject::new_inherited(),
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id: id,
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target: Cell::new(None),
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is_deleted: Cell::new(false),
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renderer: renderer,
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}
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}
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pub fn maybe_new(global: GlobalRef, renderer: IpcSender<CanvasMsg>)
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-> Option<Root<WebGLBuffer>> {
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let (sender, receiver) = ipc::channel().unwrap();
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renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::CreateBuffer(sender))).unwrap();
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let result = receiver.recv().unwrap();
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result.map(|buffer_id| WebGLBuffer::new(global, renderer, *buffer_id))
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}
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pub fn new(global: GlobalRef, renderer: IpcSender<CanvasMsg>, id: u32) -> Root<WebGLBuffer> {
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reflect_dom_object(box WebGLBuffer::new_inherited(renderer, id), global, WebGLBufferBinding::Wrap)
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}
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}
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impl WebGLBuffer {
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pub fn id(&self) -> u32 {
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self.id
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}
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// NB: Only valid buffer targets come here
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pub fn bind(&self, target: u32) -> WebGLResult<()> {
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if let Some(previous_target) = self.target.get() {
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if target != previous_target {
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return Err(WebGLError::InvalidOperation);
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}
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} else {
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self.target.set(Some(target));
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}
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::BindBuffer(target, self.id))).unwrap();
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Ok(())
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}
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pub fn delete(&self) {
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if !self.is_deleted.get() {
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self.is_deleted.set(true);
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let _ = self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::DeleteBuffer(self.id)));
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}
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}
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}
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impl Drop for WebGLBuffer {
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fn drop(&mut self) {
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self.delete();
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}
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}
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