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Diffstat (limited to '')
-rw-r--r-- | gfx/vr/VRDisplayPresentation.cpp | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/gfx/vr/VRDisplayPresentation.cpp b/gfx/vr/VRDisplayPresentation.cpp new file mode 100644 index 0000000000..b5234f1443 --- /dev/null +++ b/gfx/vr/VRDisplayPresentation.cpp @@ -0,0 +1,151 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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/. */ + +#include "VRDisplayPresentation.h" +#include "mozilla/dom/DocGroup.h" +#include "mozilla/dom/Document.h" +#include "mozilla/dom/XRWebGLLayer.h" +#include "mozilla/Unused.h" +#include "VRDisplayClient.h" +#include "VRLayerChild.h" + +using namespace mozilla; +using namespace mozilla::gfx; + +VRDisplayPresentation::VRDisplayPresentation( + VRDisplayClient* aDisplayClient, + const nsTArray<mozilla::dom::VRLayer>& aLayers, uint32_t aGroup) + : mDisplayClient(aDisplayClient), + mDOMLayers(aLayers.Clone()), + mGroup(aGroup) { + CreateLayers(); +} + +void VRDisplayPresentation::UpdateLayers( + const nsTArray<mozilla::dom::VRLayer>& aLayers) { + mDOMLayers = aLayers.Clone(); + CreateLayers(); +} + +void VRDisplayPresentation::UpdateXRWebGLLayer(dom::XRWebGLLayer* aLayer) { + VRManagerChild* manager = VRManagerChild::Get(); + if (!manager) { + // This should not happen, but let's log it and avoid a crash in case + // of regression. + NS_WARNING("VRManagerChild::Get returned null!"); + return; + } + + dom::HTMLCanvasElement* canvasElement = aLayer->GetCanvas(); + + if (mLayers.Length() == 0) { + // WebXR uses a single layer for now. + RefPtr<VRLayerChild> vrLayer = + static_cast<VRLayerChild*>(manager->CreateVRLayer( + mDisplayClient->GetDisplayInfo().GetDisplayID(), mGroup)); + mLayers.AppendElement(vrLayer); + } + RefPtr<VRLayerChild> vrLayer = mLayers[0]; + + Rect leftBounds(0.0, 0.0, 0.5, 1.0); + Rect rightBounds(0.5, 0.0, 0.5, 1.0); + + vrLayer->Initialize(canvasElement, leftBounds, rightBounds); + vrLayer->SetXRFramebuffer(aLayer->GetFramebuffer()); +} + +uint32_t VRDisplayPresentation::GetGroup() const { return mGroup; } + +void VRDisplayPresentation::CreateLayers() { + VRManagerChild* manager = VRManagerChild::Get(); + if (!manager) { + // This should not happen, but let's log it and avoid a crash in case + // of regression. + NS_WARNING("VRManagerChild::Get returned null!"); + return; + } + + unsigned int iLayer = 0; + for (dom::VRLayer& layer : mDOMLayers) { + dom::HTMLCanvasElement* canvasElement = layer.mSource; + if (!canvasElement) { + /// XXX In the future we will support WebVR in WebWorkers here + continue; + } + + Rect leftBounds(0.0, 0.0, 0.5, 1.0); + if (layer.mLeftBounds.Length() == 4) { + leftBounds.SetRect(layer.mLeftBounds[0], layer.mLeftBounds[1], + layer.mLeftBounds[2], layer.mLeftBounds[3]); + } else if (layer.mLeftBounds.Length() != 0) { + /** + * We ignore layers with an incorrect number of values. + * In the future, VRDisplay.requestPresent may throw in + * this case. See https://github.com/w3c/webvr/issues/71 + */ + continue; + } + + Rect rightBounds(0.5, 0.0, 0.5, 1.0); + if (layer.mRightBounds.Length() == 4) { + rightBounds.SetRect(layer.mRightBounds[0], layer.mRightBounds[1], + layer.mRightBounds[2], layer.mRightBounds[3]); + } else if (layer.mRightBounds.Length() != 0) { + /** + * We ignore layers with an incorrect number of values. + * In the future, VRDisplay.requestPresent may throw in + * this case. See https://github.com/w3c/webvr/issues/71 + */ + continue; + } + + if (mLayers.Length() <= iLayer) { + // Not enough layers, let's add one + RefPtr<VRLayerChild> vrLayer = + static_cast<VRLayerChild*>(manager->CreateVRLayer( + mDisplayClient->GetDisplayInfo().GetDisplayID(), mGroup)); + if (!vrLayer) { + NS_WARNING("CreateVRLayer returned null!"); + continue; + } + vrLayer->Initialize(canvasElement, leftBounds, rightBounds); + mLayers.AppendElement(vrLayer); + } else { + // We already have a layer, let's update it + mLayers[iLayer]->Initialize(canvasElement, leftBounds, rightBounds); + } + iLayer++; + } + + // Truncate any excess layers that weren't included in the updated list + mLayers.SetLength(iLayer); +} + +void VRDisplayPresentation::DestroyLayers() { + for (VRLayerChild* layer : mLayers) { + if (layer->IsIPCOpen()) { + Unused << layer->SendDestroy(); + } + } + mLayers.Clear(); +} + +void VRDisplayPresentation::GetDOMLayers(nsTArray<dom::VRLayer>& result) { + result = mDOMLayers.Clone(); +} + +VRDisplayPresentation::~VRDisplayPresentation() { + DestroyLayers(); + mDisplayClient->PresentationDestroyed(); +} + +void VRDisplayPresentation::SubmitFrame() { + // Currently only one layer supported, submit only the first + if (mLayers.Length() >= 1) { + VRLayerChild* layer = mLayers.ElementAt(0); + layer->SubmitFrame(mDisplayClient->GetDisplayInfo()); + } +} |