forked from mirrors/gecko-dev
4f37e0ba01
This improves the encapsulation and consistency in our WebGL
implementation.
Also allows to implement new methods such as `getShaderSource()`.
It will also allow us to use `delete()` in the destructors of them (note
that we will probably want to keep track of them from the context before).
Some concerns:
**Trait method repetition**:
I'm aware that the traits `WebGL{Buffer,Renderbuffer,Framebuffer,Texture}Helpers` are basically the same, but `delete()` and `id()` methods are everywhere. I've thought something like:
```rust
pub trait WebGLIdentifiable {
type WebGLId; // id is sometimes i32 (see WebGLUniformLocation)
fn id(&self) -> Self::WebGLId;
}
pub trait WebGLBindable {
fn bind(&self);
}
pub trait WebGLDeletable {
fn delete(&self);
}
```
But I'd want to know your opinion first.
**`renderer` repetition**:
Thought of moving the field: `renderer: Sender<CanvasMsg>` to `WebGLObject`, but I think it makes it way more complicated to read, and also a bit unnecessary, at least IMO (`WebGLObject` will never interact with the field directly). It would also mean that all `WebGLObject`s should have one, which is true at this moment, but maybe not with WebGL 2, for example.
Source-Repo: https://github.com/servo/servo
Source-Revision: 0f8095b950dd144497919cfea65a1f154ed3ae9a
68 lines
2.1 KiB
Rust
68 lines
2.1 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 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 canvas_traits::{CanvasMsg, CanvasWebGLMsg};
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use std::sync::mpsc::{channel, Sender};
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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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is_deleted: Cell<bool>,
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renderer: Sender<CanvasMsg>,
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}
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impl WebGLBuffer {
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fn new_inherited(renderer: Sender<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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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: Sender<CanvasMsg>) -> Option<Root<WebGLBuffer>> {
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let (sender, receiver) = channel();
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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: Sender<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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pub trait WebGLBufferHelpers {
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fn id(self) -> u32;
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fn bind(self, target: u32);
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fn delete(self);
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}
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impl<'a> WebGLBufferHelpers for &'a WebGLBuffer {
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fn id(self) -> u32 {
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self.id
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}
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fn bind(self, target: u32) {
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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::BindBuffer(target, self.id))).unwrap();
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}
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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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self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::DeleteBuffer(self.id))).unwrap();
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}
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}
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}
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