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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::webgl::{webgl_channel, WebGLCommand, WebGLError, WebGLRenderbufferId, WebGLResult};
use dom::bindings::codegen::Bindings::WebGL2RenderingContextBinding::WebGL2RenderingContextConstants as WebGl2Constants;
use dom::bindings::codegen::Bindings::WebGLRenderbufferBinding;
use dom::bindings::codegen::Bindings::WebGLRenderingContextBinding::WebGLRenderingContextConstants as constants;
use dom::bindings::inheritance::Castable;
use dom::bindings::reflector::{DomObject, reflect_dom_object};
use dom::bindings::root::DomRoot;
use dom::webglobject::WebGLObject;
use dom::webglrenderingcontext::{WebGLRenderingContext, is_gles};
use dom_struct::dom_struct;
use std::cell::Cell;
#[dom_struct]
pub struct WebGLRenderbuffer {
webgl_object: WebGLObject,
id: WebGLRenderbufferId,
ever_bound: Cell<bool>,
is_deleted: Cell<bool>,
size: Cell<Option<(i32, i32)>>,
internal_format: Cell<Option<u32>>,
is_initialized: Cell<bool>,
}
impl WebGLRenderbuffer {
fn new_inherited(context: &WebGLRenderingContext, id: WebGLRenderbufferId) -> Self {
Self {
webgl_object: WebGLObject::new_inherited(context),
id: id,
ever_bound: Cell::new(false),
is_deleted: Cell::new(false),
internal_format: Cell::new(None),
size: Cell::new(None),
is_initialized: Cell::new(false),
}
}
pub fn maybe_new(context: &WebGLRenderingContext) -> Option<DomRoot<Self>> {
let (sender, receiver) = webgl_channel().unwrap();
context.send_command(WebGLCommand::CreateRenderbuffer(sender));
receiver.recv().unwrap().map(|id| WebGLRenderbuffer::new(context, id))
}
pub fn new(context: &WebGLRenderingContext, id: WebGLRenderbufferId) -> DomRoot<Self> {
reflect_dom_object(
Box::new(WebGLRenderbuffer::new_inherited(context, id)),
&*context.global(),
WebGLRenderbufferBinding::Wrap,
)
}
}
impl WebGLRenderbuffer {
pub fn id(&self) -> WebGLRenderbufferId {
self.id
}
pub fn size(&self) -> Option<(i32, i32)> {
self.size.get()
}
pub fn internal_format(&self) -> u32 {
self.internal_format.get().unwrap_or(constants::RGBA4)
}
pub fn mark_initialized(&self) {
self.is_initialized.set(true);
}
pub fn is_initialized(&self) -> bool {
self.is_initialized.get()
}
pub fn bind(&self, target: u32) {
self.ever_bound.set(true);
self.upcast::<WebGLObject>()
.context()
.send_command(WebGLCommand::BindRenderbuffer(target, Some(self.id)));
}
pub fn delete(&self) {
if !self.is_deleted.get() {
self.is_deleted.set(true);
self.upcast::<WebGLObject>()
.context()
.send_command(WebGLCommand::DeleteRenderbuffer(self.id));
}
}
pub fn is_deleted(&self) -> bool {
self.is_deleted.get()
}
pub fn ever_bound(&self) -> bool {
self.ever_bound.get()
}
pub fn storage(&self, internal_format: u32, width: i32, height: i32) -> WebGLResult<()> {
// Validate the internal_format, and save it for completeness
// validation.
let actual_format = match internal_format {
constants::RGBA4 |
constants::DEPTH_COMPONENT16 |
constants::STENCIL_INDEX8 |
// https://www.khronos.org/registry/webgl/specs/latest/1.0/#6.7
constants::DEPTH_STENCIL => internal_format,
constants::RGB5_A1 => {
// 16-bit RGBA formats are not supported on desktop GL.
if is_gles() {
constants::RGB5_A1
} else {
WebGl2Constants::RGBA8
}
}
constants::RGB565 => {
// RGB565 is not supported on desktop GL.
if is_gles() {
constants::RGB565
} else {
WebGl2Constants::RGB8
}
}
_ => return Err(WebGLError::InvalidEnum),
};
self.internal_format.set(Some(internal_format));
// FIXME: Invalidate completeness after the call
self.upcast::<WebGLObject>().context().send_command(
WebGLCommand::RenderbufferStorage(
constants::RENDERBUFFER,
actual_format,
width,
height,
)
);
self.size.set(Some((width, height)));
Ok(())
}
}
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