1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
|
/* 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 angle::hl::{BuiltInResources, Output, ShaderValidator};
use canvas_traits::{CanvasMsg, CanvasWebGLMsg, WebGLError, WebGLResult, WebGLShaderParameter};
use dom::bindings::cell::DOMRefCell;
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextConstants as constants;
use dom::bindings::codegen::Bindings::WebGLShaderBinding;
use dom::bindings::global::GlobalRef;
use dom::bindings::js::Root;
use dom::bindings::reflector::reflect_dom_object;
use dom::webglobject::WebGLObject;
use ipc_channel::ipc::{self, IpcSender};
use std::cell::Cell;
use std::sync::{ONCE_INIT, Once};
use util::str::DOMString;
#[derive(Clone, Copy, PartialEq, Debug, JSTraceable, HeapSizeOf)]
pub enum ShaderCompilationStatus {
NotCompiled,
Succeeded,
Failed,
}
#[dom_struct]
pub struct WebGLShader {
webgl_object: WebGLObject,
id: u32,
gl_type: u32,
source: DOMRefCell<Option<DOMString>>,
info_log: DOMRefCell<Option<String>>,
is_deleted: Cell<bool>,
compilation_status: Cell<ShaderCompilationStatus>,
#[ignore_heap_size_of = "Defined in ipc-channel"]
renderer: IpcSender<CanvasMsg>,
}
#[cfg(not(target_os = "android"))]
const SHADER_OUTPUT_FORMAT: Output = Output::Glsl;
#[cfg(target_os = "android")]
const SHADER_OUTPUT_FORMAT: Output = Output::Essl;
static GLSLANG_INITIALIZATION: Once = ONCE_INIT;
impl WebGLShader {
fn new_inherited(renderer: IpcSender<CanvasMsg>, id: u32, shader_type: u32) -> WebGLShader {
GLSLANG_INITIALIZATION.call_once(|| ::angle::hl::initialize().unwrap());
WebGLShader {
webgl_object: WebGLObject::new_inherited(),
id: id,
gl_type: shader_type,
source: DOMRefCell::new(None),
info_log: DOMRefCell::new(None),
is_deleted: Cell::new(false),
compilation_status: Cell::new(ShaderCompilationStatus::NotCompiled),
renderer: renderer,
}
}
pub fn maybe_new(global: GlobalRef,
renderer: IpcSender<CanvasMsg>,
shader_type: u32) -> Option<Root<WebGLShader>> {
let (sender, receiver) = ipc::channel().unwrap();
renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::CreateShader(shader_type, sender))).unwrap();
let result = receiver.recv().unwrap();
result.map(|shader_id| WebGLShader::new(global, renderer, *shader_id, shader_type))
}
pub fn new(global: GlobalRef,
renderer: IpcSender<CanvasMsg>,
id: u32,
shader_type: u32) -> Root<WebGLShader> {
reflect_dom_object(
box WebGLShader::new_inherited(renderer, id, shader_type), global, WebGLShaderBinding::Wrap)
}
}
impl WebGLShader {
pub fn id(&self) -> u32 {
self.id
}
pub fn gl_type(&self) -> u32 {
self.gl_type
}
/// glCompileShader
pub fn compile(&self) {
if self.compilation_status.get() != ShaderCompilationStatus::NotCompiled {
debug!("Compiling already compiled shader {}", self.id);
}
if let Some(ref source) = *self.source.borrow() {
let validator = ShaderValidator::for_webgl(self.gl_type,
SHADER_OUTPUT_FORMAT,
&BuiltInResources::default()).unwrap();
match validator.compile_and_translate(&[source.as_bytes()]) {
Ok(translated_source) => {
// NOTE: At this point we should be pretty sure that the compilation in the paint task
// will succeed.
// It could be interesting to retrieve the info log from the paint task though
let msg = CanvasWebGLMsg::CompileShader(self.id, translated_source);
self.renderer.send(CanvasMsg::WebGL(msg)).unwrap();
self.compilation_status.set(ShaderCompilationStatus::Succeeded);
},
Err(error) => {
self.compilation_status.set(ShaderCompilationStatus::Failed);
debug!("Shader {} compilation failed: {}", self.id, error);
},
}
*self.info_log.borrow_mut() = Some(validator.info_log());
}
}
/// Mark this shader as deleted (if it wasn't previously)
/// and delete it as if calling glDeleteShader.
pub fn delete(&self) {
if !self.is_deleted.get() {
self.is_deleted.set(true);
let _ = self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::DeleteShader(self.id)));
}
}
/// glGetShaderInfoLog
pub fn info_log(&self) -> Option<String> {
self.info_log.borrow().clone()
}
/// glGetShaderParameter
pub fn parameter(&self, param_id: u32) -> WebGLResult<WebGLShaderParameter> {
match param_id {
constants::SHADER_TYPE | constants::DELETE_STATUS | constants::COMPILE_STATUS => {},
_ => return Err(WebGLError::InvalidEnum),
}
let (sender, receiver) = ipc::channel().unwrap();
self.renderer.send(CanvasMsg::WebGL(CanvasWebGLMsg::GetShaderParameter(self.id, param_id, sender))).unwrap();
Ok(receiver.recv().unwrap())
}
/// Get the shader source
pub fn source(&self) -> Option<DOMString> {
self.source.borrow().clone()
}
/// glShaderSource
pub fn set_source(&self, source: DOMString) {
*self.source.borrow_mut() = Some(source);
}
}
impl Drop for WebGLShader {
fn drop(&mut self) {
self.delete();
}
}
|
