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
163
164
165
166
167
168
169
|
/* 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/. */
use canvas_traits::webgl::{webgl_channel, WebGLCommand, WebGLError, WebGLVersion};
use dom::bindings::codegen::Bindings::OESVertexArrayObjectBinding::{self, OESVertexArrayObjectMethods};
use dom::bindings::codegen::Bindings::OESVertexArrayObjectBinding::OESVertexArrayObjectConstants;
use dom::bindings::reflector::{DomObject, Reflector, reflect_dom_object};
use dom::bindings::root::{Dom, DomRoot, MutNullableDom};
use dom::webglrenderingcontext::WebGLRenderingContext;
use dom::webglvertexarrayobjectoes::WebGLVertexArrayObjectOES;
use dom_struct::dom_struct;
use js::conversions::ToJSValConvertible;
use js::jsapi::JSContext;
use js::jsval::{JSVal, NullValue};
use std::iter;
use super::{WebGLExtension, WebGLExtensions, WebGLExtensionSpec};
#[dom_struct]
pub struct OESVertexArrayObject {
reflector_: Reflector,
ctx: Dom<WebGLRenderingContext>,
bound_vao: MutNullableDom<WebGLVertexArrayObjectOES>,
}
impl OESVertexArrayObject {
fn new_inherited(ctx: &WebGLRenderingContext) -> OESVertexArrayObject {
Self {
reflector_: Reflector::new(),
ctx: Dom::from_ref(ctx),
bound_vao: MutNullableDom::new(None)
}
}
#[allow(unsafe_code)]
fn get_current_binding(&self, cx:*mut JSContext) -> JSVal {
rooted!(in(cx) let mut rval = NullValue());
if let Some(bound_vao) = self.bound_vao.get() {
unsafe {
bound_vao.to_jsval(cx, rval.handle_mut());
}
}
rval.get()
}
}
impl OESVertexArrayObjectMethods for OESVertexArrayObject {
// https://www.khronos.org/registry/webgl/extensions/OES_vertex_array_object/
fn CreateVertexArrayOES(&self) -> Option<DomRoot<WebGLVertexArrayObjectOES>> {
let (sender, receiver) = webgl_channel().unwrap();
self.ctx.send_command(WebGLCommand::CreateVertexArray(sender));
let result = receiver.recv().unwrap();
result.map(|vao_id| WebGLVertexArrayObjectOES::new(&self.global(), vao_id))
}
// https://www.khronos.org/registry/webgl/extensions/OES_vertex_array_object/
fn DeleteVertexArrayOES(&self, vao: Option<&WebGLVertexArrayObjectOES>) {
if let Some(vao) = vao {
if vao.is_deleted() {
return;
}
// Unbind deleted VAO if currently bound
if let Some(bound_vao) = self.bound_vao.get() {
if bound_vao.id() == vao.id() {
self.bound_vao.set(None);
self.ctx.send_command(WebGLCommand::BindVertexArray(None));
}
}
// Remove VAO references from buffers
let buffers = vao.bound_attrib_buffers();
for buffer in buffers {
buffer.remove_vao_reference(vao.id());
}
if let Some(buffer) = vao.bound_buffer_element_array() {
buffer.remove_vao_reference(vao.id());
}
// Delete the vao
self.ctx.send_command(WebGLCommand::DeleteVertexArray(vao.id()));
vao.set_deleted();
}
}
// https://www.khronos.org/registry/webgl/extensions/OES_vertex_array_object/
fn IsVertexArrayOES(&self, vao: Option<&WebGLVertexArrayObjectOES>) -> bool {
// Conformance tests expect false if vao never bound
vao.map_or(false, |vao| !vao.is_deleted() && vao.ever_bound())
}
// https://www.khronos.org/registry/webgl/extensions/OES_vertex_array_object/
fn BindVertexArrayOES(&self, vao: Option<&WebGLVertexArrayObjectOES>) {
if let Some(bound_vao) = self.bound_vao.get() {
// Store buffers attached to attrib pointers
let buffers = self.ctx.borrow_bound_attrib_buffers();
bound_vao.set_bound_attrib_buffers(buffers.iter().map(|(key, buffer)| {
(*buffer).add_vao_reference(bound_vao.id());
(*key, &**buffer)
}));
// Store element array buffer
let element_array = self.ctx.bound_buffer_element_array();
bound_vao.set_bound_buffer_element_array(element_array.as_ref().map(|buffer| {
buffer.add_vao_reference(bound_vao.id());
&**buffer
}));
}
if let Some(vao) = vao {
if vao.is_deleted() {
self.ctx.webgl_error(WebGLError::InvalidOperation);
return;
}
self.ctx.send_command(WebGLCommand::BindVertexArray(Some(vao.id())));
vao.set_ever_bound();
self.bound_vao.set(Some(&vao));
// Restore WebGLRenderingContext current bindings
let buffers = vao.borrow_bound_attrib_buffers();
self.ctx.set_bound_attrib_buffers(buffers.iter().map(|(k, v)| (*k, &**v)));
let element_array = vao.bound_buffer_element_array();
self.ctx.set_bound_buffer_element_array(element_array.as_ref().map(|buffer| &**buffer));
} else {
self.ctx.send_command(WebGLCommand::BindVertexArray(None));
self.bound_vao.set(None);
self.ctx.set_bound_attrib_buffers(iter::empty());
}
}
}
impl WebGLExtension for OESVertexArrayObject {
type Extension = OESVertexArrayObject;
fn new(ctx: &WebGLRenderingContext) -> DomRoot<OESVertexArrayObject> {
reflect_dom_object(Box::new(OESVertexArrayObject::new_inherited(ctx)),
&*ctx.global(),
OESVertexArrayObjectBinding::Wrap)
}
fn spec() -> WebGLExtensionSpec {
WebGLExtensionSpec::Specific(WebGLVersion::WebGL1)
}
fn is_supported(ext: &WebGLExtensions) -> bool {
ext.supports_any_gl_extension(&["GL_OES_vertex_array_object",
"GL_ARB_vertex_array_object",
"GL_APPLE_vertex_array_object"])
}
fn enable(ext: &WebGLExtensions) {
let query = OESVertexArrayObjectConstants::VERTEX_ARRAY_BINDING_OES;
ext.add_query_parameter_handler(query, Box::new(|cx, webgl_ctx| {
match webgl_ctx.get_extension_manager().get_dom_object::<OESVertexArrayObject>() {
Some(dom_object) => {
Ok(dom_object.get_current_binding(cx))
},
None => {
// Extension instance not found!
Err(WebGLError::InvalidOperation)
}
}
}));
}
fn name() -> &'static str {
"OES_vertex_array_object"
}
}
|
