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/* 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;
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::{Reflectable, reflect_dom_object};
use dom::webglactiveinfo::WebGLActiveInfo;
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;
use webrender_traits::{WebGLCommand, WebGLError, WebGLParameter, WebGLResult};
#[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(WebGLCommand::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 {
pub fn id(&self) -> u32 {
self.id
}
/// glDeleteProgram
pub fn delete(&self) {
if !self.is_deleted.get() {
self.is_deleted.set(true);
let _ = self.renderer.send(CanvasMsg::WebGL(WebGLCommand::DeleteProgram(self.id)));
}
}
/// glLinkProgram
pub fn link(&self) {
self.renderer.send(CanvasMsg::WebGL(WebGLCommand::LinkProgram(self.id))).unwrap();
}
/// glUseProgram
pub fn use_program(&self) -> WebGLResult<()> {
match self.fragment_shader.get() {
Some(ref shader) if shader.successfully_compiled() => {},
_ => return Err(WebGLError::InvalidOperation),
}
match self.vertex_shader.get() {
Some(ref shader) if shader.successfully_compiled() => {},
_ => return Err(WebGLError::InvalidOperation),
}
self.renderer.send(CanvasMsg::WebGL(WebGLCommand::UseProgram(self.id))).unwrap();
Ok(())
}
/// 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,
_ => {
error!("detachShader: Unexpected shader type");
return Err(WebGLError::InvalidValue);
}
};
// TODO(emilio): 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(WebGLCommand::AttachShader(self.id, shader.id()))).unwrap();
Ok(())
}
/// glDetachShader
pub fn detach_shader(&self, shader: &WebGLShader) -> WebGLResult<()> {
let shader_slot = match shader.gl_type() {
constants::FRAGMENT_SHADER => &self.fragment_shader,
constants::VERTEX_SHADER => &self.vertex_shader,
_ => {
error!("detachShader: Unexpected shader type");
return Err(WebGLError::InvalidValue);
}
};
match shader_slot.get() {
Some(ref attached_shader) if attached_shader.id() != shader.id() =>
return Err(WebGLError::InvalidOperation),
None =>
return Err(WebGLError::InvalidOperation),
_ => {}
}
shader_slot.set(None);
self.renderer.send(CanvasMsg::WebGL(WebGLCommand::DetachShader(self.id, shader.id()))).unwrap();
Ok(())
}
/// glBindAttribLocation
pub fn bind_attrib_location(&self, index: u32, name: DOMString) -> WebGLResult<()> {
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 Err(WebGLError::InvalidOperation);
}
self.renderer
.send(CanvasMsg::WebGL(WebGLCommand::BindAttribLocation(self.id, index, String::from(name))))
.unwrap();
Ok(())
}
pub fn get_active_uniform(&self, index: u32) -> WebGLResult<Root<WebGLActiveInfo>> {
let (sender, receiver) = ipc::channel().unwrap();
self.renderer
.send(CanvasMsg::WebGL(WebGLCommand::GetActiveUniform(self.id, index, sender)))
.unwrap();
receiver.recv().unwrap().map(|(size, ty, name)|
WebGLActiveInfo::new(self.global().r(), size, ty, DOMString::from(name)))
}
/// glGetActiveAttrib
pub fn get_active_attrib(&self, index: u32) -> WebGLResult<Root<WebGLActiveInfo>> {
let (sender, receiver) = ipc::channel().unwrap();
self.renderer
.send(CanvasMsg::WebGL(WebGLCommand::GetActiveAttrib(self.id, index, sender)))
.unwrap();
receiver.recv().unwrap().map(|(size, ty, name)|
WebGLActiveInfo::new(self.global().r(), size, ty, DOMString::from(name)))
}
/// 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(WebGLCommand::GetAttribLocation(self.id, String::from(name), 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(WebGLCommand::GetUniformLocation(self.id, String::from(name), sender)))
.unwrap();
Ok(receiver.recv().unwrap())
}
/// glGetProgramParameter
pub fn parameter(&self, param_id: u32) -> WebGLResult<WebGLParameter> {
let (sender, receiver) = ipc::channel().unwrap();
self.renderer.send(CanvasMsg::WebGL(WebGLCommand::GetProgramParameter(self.id, param_id, sender))).unwrap();
receiver.recv().unwrap()
}
}
impl Drop for WebGLProgram {
fn drop(&mut self) {
self.delete();
}
}
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