servo/components/script/dom/webglprogram.rs
Ms2ger 6b75078503 Make DOMString a newtype around String, rather than a typedef.
This should make it somewhat easier to experiment with alternative
representations in the future. To reduce churn, this commit leaves the String
field public, though.

Also, this will allow us to use the default String type to represent the IDL
USVString type, which explicitly forbids unpaired surrogates, ans as such is
a better match to the Rust String type.
2015-11-04 12:09:11 +01:00

134 lines
4.7 KiB
Rust

/* 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/. */
// https://www.khronos.org/registry/webgl/specs/latest/1.0/webgl.idl
use canvas_traits::{CanvasMsg, CanvasWebGLMsg, WebGLError, WebGLResult};
use dom::bindings::codegen::Bindings::WebGLProgramBinding;
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextConstants as constants;
use dom::bindings::global::GlobalRef;
use dom::bindings::js::{JS, MutNullableHeap, Root};
use dom::bindings::reflector::reflect_dom_object;
use dom::webglobject::WebGLObject;
use dom::webglrenderingcontext::MAX_UNIFORM_AND_ATTRIBUTE_LEN;
use dom::webglshader::WebGLShader;
use ipc_channel::ipc::{self, IpcSender};
use std::cell::Cell;
use util::str::DOMString;
#[dom_struct]
pub struct WebGLProgram {
webgl_object: WebGLObject,
id: u32,
is_deleted: Cell<bool>,
fragment_shader: MutNullableHeap<JS<WebGLShader>>,
vertex_shader: MutNullableHeap<JS<WebGLShader>>,
#[ignore_heap_size_of = "Defined in ipc-channel"]
renderer: IpcSender<CanvasMsg>,
}
impl WebGLProgram {
fn new_inherited(renderer: IpcSender<CanvasMsg>, id: u32) -> WebGLProgram {
WebGLProgram {
webgl_object: WebGLObject::new_inherited(),
id: id,
is_deleted: Cell::new(false),
fragment_shader: Default::default(),
vertex_shader: Default::default(),
renderer: renderer,
}
}
pub fn maybe_new(global: GlobalRef, renderer: IpcSender<CanvasMsg>)
-> Option<Root<WebGLProgram>> {
let (sender, receiver) = ipc::channel().unwrap();
renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::CreateProgram(sender))).unwrap();
let result = receiver.recv().unwrap();
result.map(|program_id| WebGLProgram::new(global, renderer, *program_id))
}
pub fn new(global: GlobalRef, renderer: IpcSender<CanvasMsg>, id: u32) -> Root<WebGLProgram> {
reflect_dom_object(box WebGLProgram::new_inherited(renderer, id), global, WebGLProgramBinding::Wrap)
}
}
impl WebGLProgram {
/// glDeleteProgram
pub fn delete(&self) {
if !self.is_deleted.get() {
self.is_deleted.set(true);
let _ = self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::DeleteProgram(self.id)));
}
}
/// glLinkProgram
pub fn link(&self) {
self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::LinkProgram(self.id))).unwrap();
}
/// glUseProgram
pub fn use_program(&self) {
self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::UseProgram(self.id))).unwrap();
}
/// glAttachShader
pub fn attach_shader(&self, shader: &WebGLShader) -> WebGLResult<()> {
let shader_slot = match shader.gl_type() {
constants::FRAGMENT_SHADER => &self.fragment_shader,
constants::VERTEX_SHADER => &self.vertex_shader,
_ => return Err(WebGLError::InvalidOperation),
};
// TODO(ecoal95): Differentiate between same shader already assigned and other previous
// shader.
if shader_slot.get().is_some() {
return Err(WebGLError::InvalidOperation);
}
shader_slot.set(Some(shader));
self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::AttachShader(self.id, shader.id()))).unwrap();
Ok(())
}
/// glGetAttribLocation
pub fn get_attrib_location(&self, name: DOMString) -> WebGLResult<Option<i32>> {
if name.len() > MAX_UNIFORM_AND_ATTRIBUTE_LEN {
return Err(WebGLError::InvalidValue);
}
// Check if the name is reserved
if name.starts_with("webgl") || name.starts_with("_webgl_") {
return Ok(None);
}
let (sender, receiver) = ipc::channel().unwrap();
self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::GetAttribLocation(self.id, name.0, sender))).unwrap();
Ok(receiver.recv().unwrap())
}
/// glGetUniformLocation
pub fn get_uniform_location(&self, name: DOMString) -> WebGLResult<Option<i32>> {
if name.len() > MAX_UNIFORM_AND_ATTRIBUTE_LEN {
return Err(WebGLError::InvalidValue);
}
// Check if the name is reserved
if name.starts_with("webgl") || name.starts_with("_webgl_") {
return Ok(None);
}
let (sender, receiver) = ipc::channel().unwrap();
self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::GetUniformLocation(self.id, name.0, sender))).unwrap();
Ok(receiver.recv().unwrap())
}
}
impl Drop for WebGLProgram {
fn drop(&mut self) {
self.delete();
}
}