зеркало из https://github.com/mozilla/gecko-dev.git
123 строки
3.4 KiB
C++
123 строки
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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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 http://mozilla.org/MPL/2.0/. */
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#include "VRDisplayPresentation.h"
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#include "mozilla/dom/DocGroup.h"
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#include "mozilla/Unused.h"
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#include "VRDisplayClient.h"
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#include "VRLayerChild.h"
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using namespace mozilla;
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using namespace mozilla::gfx;
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VRDisplayPresentation::VRDisplayPresentation(VRDisplayClient *aDisplayClient,
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const nsTArray<mozilla::dom::VRLayer>& aLayers)
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: mDisplayClient(aDisplayClient)
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, mDOMLayers(aLayers)
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{
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CreateLayers();
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}
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void
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VRDisplayPresentation::CreateLayers()
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{
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if (mLayers.Length()) {
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return;
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}
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for (dom::VRLayer& layer : mDOMLayers) {
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dom::HTMLCanvasElement* canvasElement = layer.mSource;
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if (!canvasElement) {
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/// XXX In the future we will support WebVR in WebWorkers here
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continue;
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}
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Rect leftBounds(0.0, 0.0, 0.5, 1.0);
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if (layer.mLeftBounds.Length() == 4) {
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leftBounds.x = layer.mLeftBounds[0];
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leftBounds.y = layer.mLeftBounds[1];
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leftBounds.width = layer.mLeftBounds[2];
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leftBounds.height = layer.mLeftBounds[3];
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} else if (layer.mLeftBounds.Length() != 0) {
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/**
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* We ignore layers with an incorrect number of values.
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* In the future, VRDisplay.requestPresent may throw in
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* this case. See https://github.com/w3c/webvr/issues/71
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*/
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continue;
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}
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Rect rightBounds(0.5, 0.0, 0.5, 1.0);
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if (layer.mRightBounds.Length() == 4) {
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rightBounds.x = layer.mRightBounds[0];
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rightBounds.y = layer.mRightBounds[1];
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rightBounds.width = layer.mRightBounds[2];
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rightBounds.height = layer.mRightBounds[3];
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} else if (layer.mRightBounds.Length() != 0) {
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/**
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* We ignore layers with an incorrect number of values.
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* In the future, VRDisplay.requestPresent may throw in
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* this case. See https://github.com/w3c/webvr/issues/71
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*/
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continue;
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}
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VRManagerChild *manager = VRManagerChild::Get();
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if (!manager) {
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NS_WARNING("VRManagerChild::Get returned null!");
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continue;
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}
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nsCOMPtr<nsIEventTarget> target;
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nsIDocument* doc;
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doc = canvasElement->OwnerDoc();
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if (doc) {
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target = doc->EventTargetFor(TaskCategory::Other);
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}
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RefPtr<VRLayerChild> vrLayer =
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static_cast<VRLayerChild*>(manager->CreateVRLayer(mDisplayClient->GetDisplayInfo().GetDisplayID(),
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leftBounds, rightBounds, target));
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if (!vrLayer) {
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NS_WARNING("CreateVRLayer returned null!");
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continue;
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}
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vrLayer->Initialize(canvasElement);
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mLayers.AppendElement(vrLayer);
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}
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}
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void
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VRDisplayPresentation::DestroyLayers()
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{
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for (VRLayerChild* layer : mLayers) {
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Unused << layer->SendDestroy();
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}
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mLayers.Clear();
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}
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void
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VRDisplayPresentation::GetDOMLayers(nsTArray<dom::VRLayer>& result)
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{
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result = mDOMLayers;
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}
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VRDisplayPresentation::~VRDisplayPresentation()
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{
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DestroyLayers();
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mDisplayClient->PresentationDestroyed();
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}
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void VRDisplayPresentation::SubmitFrame()
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{
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for (VRLayerChild *layer : mLayers) {
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layer->SubmitFrame();
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break; // Currently only one layer supported, submit only the first
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}
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}
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