зеркало из https://github.com/mozilla/gecko-dev.git
148 строки
4.2 KiB
C++
148 строки
4.2 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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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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uint32_t aGroup)
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: mDisplayClient(aDisplayClient)
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, mDOMLayers(aLayers)
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, mGroup(aGroup)
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{
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CreateLayers();
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}
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void
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VRDisplayPresentation::UpdateLayers(const nsTArray<mozilla::dom::VRLayer>& aLayers)
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{
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mDOMLayers = aLayers;
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CreateLayers();
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}
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uint32_t
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VRDisplayPresentation::GetGroup() const
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{
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return mGroup;
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}
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void
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VRDisplayPresentation::CreateLayers()
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{
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VRManagerChild *manager = VRManagerChild::Get();
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if (!manager) {
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// This should not happen, but let's log it and avoid a crash in case
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// of regression.
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NS_WARNING("VRManagerChild::Get returned null!");
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return;
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}
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unsigned int iLayer=0;
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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.SetRect(layer.mLeftBounds[0],
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layer.mLeftBounds[1],
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layer.mLeftBounds[2],
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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.SetRect(layer.mRightBounds[0],
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layer.mRightBounds[1],
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layer.mRightBounds[2],
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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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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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if (mLayers.Length() <= iLayer) {
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// Not enough layers, let's add one
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RefPtr<VRLayerChild> vrLayer =
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static_cast<VRLayerChild*>(manager->CreateVRLayer(mDisplayClient->GetDisplayInfo().GetDisplayID(),
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target, mGroup));
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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, leftBounds, rightBounds);
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mLayers.AppendElement(vrLayer);
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} else {
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// We already have a layer, let's update it
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mLayers[iLayer]->Initialize(canvasElement, leftBounds, rightBounds);
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}
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iLayer++;
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}
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// Truncate any excess layers that weren't included in the updated list
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mLayers.SetLength(iLayer);
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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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if (layer->IsIPCOpen()) {
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Unused << layer->SendDestroy();
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}
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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(mDisplayClient->GetDisplayInfo());
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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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