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Add Support for WebGL Transormfeedback
Reference: https://www.khronos.org/registry/webgl/specs/latest/2.0/#3.7.15
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parent
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commit
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17 changed files with 588 additions and 17 deletions
133
components/script/dom/webgltransformfeedback.rs
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133
components/script/dom/webgltransformfeedback.rs
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use crate::dom::bindings::codegen::Bindings::WebGLTransformFeedbackBinding;
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use crate::dom::bindings::inheritance::Castable;
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use crate::dom::bindings::reflector::{reflect_dom_object, DomObject};
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use crate::dom::bindings::root::DomRoot;
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use crate::dom::webglobject::WebGLObject;
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use crate::dom::webglrenderingcontext::WebGLRenderingContext;
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use canvas_traits::webgl::{webgl_channel, WebGLCommand};
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use dom_struct::dom_struct;
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use std::cell::Cell;
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#[dom_struct]
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pub struct WebGLTransformFeedback {
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webgl_object: WebGLObject,
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id: u32,
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marked_for_deletion: Cell<bool>,
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has_been_bound: Cell<bool>,
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is_active: Cell<bool>,
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is_paused: Cell<bool>,
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}
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impl WebGLTransformFeedback {
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fn new_inherited(context: &WebGLRenderingContext, id: u32) -> Self {
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Self {
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webgl_object: WebGLObject::new_inherited(context),
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id,
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marked_for_deletion: Cell::new(false),
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has_been_bound: Cell::new(false),
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is_active: Cell::new(false),
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is_paused: Cell::new(false),
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}
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}
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pub fn new(context: &WebGLRenderingContext) -> DomRoot<Self> {
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let (sender, receiver) = webgl_channel().unwrap();
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context.send_command(WebGLCommand::CreateTransformFeedback(sender));
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let id = receiver.recv().unwrap();
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reflect_dom_object(
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Box::new(WebGLTransformFeedback::new_inherited(context, id)),
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&*context.global(),
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WebGLTransformFeedbackBinding::Wrap,
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)
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}
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}
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impl WebGLTransformFeedback {
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pub fn bind(&self, context: &WebGLRenderingContext, target: u32) {
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context.send_command(WebGLCommand::BindTransformFeedback(target, self.id()));
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self.has_been_bound.set(true);
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}
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pub fn begin(&self, context: &WebGLRenderingContext, primitive_mode: u32) {
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if self.has_been_bound.get() && !self.is_active() {
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context.send_command(WebGLCommand::BeginTransformFeedback(primitive_mode));
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self.set_active(true);
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}
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}
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pub fn end(&self, context: &WebGLRenderingContext) {
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if self.has_been_bound.get() && self.is_active() {
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if self.is_paused() {
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context.send_command(WebGLCommand::ResumeTransformFeedback());
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}
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context.send_command(WebGLCommand::EndTransformFeedback());
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self.set_active(false);
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}
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}
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pub fn resume(&self, context: &WebGLRenderingContext) {
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if self.is_active() && self.is_paused() {
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context.send_command(WebGLCommand::ResumeTransformFeedback());
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self.set_pause(false);
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}
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}
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pub fn pause(&self, context: &WebGLRenderingContext) {
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if self.is_active() && !self.is_paused() {
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context.send_command(WebGLCommand::PauseTransformFeedback());
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self.set_pause(true);
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}
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}
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pub fn id(&self) -> u32 {
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self.id
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}
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pub fn is_valid(&self) -> bool {
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!self.marked_for_deletion.get()
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}
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pub fn is_active(&self) -> bool {
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self.is_active.get()
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}
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pub fn is_paused(&self) -> bool {
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self.is_paused.get()
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}
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pub fn delete(&self, fallible: bool) {
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if self.is_valid() && self.id() != 0 {
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self.marked_for_deletion.set(true);
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let context = self.upcast::<WebGLObject>().context();
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let cmd = WebGLCommand::DeleteTransformFeedback(self.id);
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if fallible {
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context.send_command_ignored(cmd);
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} else {
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context.send_command(cmd);
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}
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}
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}
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pub fn set_active(&self, value: bool) {
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if self.is_valid() && self.has_been_bound.get() {
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self.is_active.set(value);
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}
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}
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pub fn set_pause(&self, value: bool) {
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if self.is_valid() && self.is_active() {
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self.is_active.set(value);
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}
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}
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}
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impl Drop for WebGLTransformFeedback {
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fn drop(&mut self) {
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self.delete(true);
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}
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}
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