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import FIREFOX_52_6_0esr_RELEASE from mozilla-esr52 hg repo

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Roy Tam 2018-01-19 03:59:58 +08:00
commit dcd9973243
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112
gfx/vr/VRDisplayPresentation.cpp Normal file
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/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* 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/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)
: mDisplayClient(aDisplayClient)
, mDOMLayers(aLayers)
{
CreateLayers();
}
void
VRDisplayPresentation::CreateLayers()
{
if (mLayers.Length()) {
return;
}
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.x = layer.mLeftBounds[0];
leftBounds.y = layer.mLeftBounds[1];
leftBounds.width = layer.mLeftBounds[2];
leftBounds.height = 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.x = layer.mRightBounds[0];
rightBounds.y = layer.mRightBounds[1];
rightBounds.width = layer.mRightBounds[2];
rightBounds.height = 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;
}
VRManagerChild *manager = VRManagerChild::Get();
if (!manager) {
NS_WARNING("VRManagerChild::Get returned null!");
continue;
}
RefPtr<VRLayerChild> vrLayer = static_cast<VRLayerChild*>(manager->CreateVRLayer(mDisplayClient->GetDisplayInfo().GetDisplayID(), leftBounds, rightBounds));
if (!vrLayer) {
NS_WARNING("CreateVRLayer returned null!");
continue;
}
vrLayer->Initialize(canvasElement);
mLayers.AppendElement(vrLayer);
}
}
void
VRDisplayPresentation::DestroyLayers()
{
for (VRLayerChild* layer : mLayers) {
Unused << layer->SendDestroy();
}
mLayers.Clear();
}
void
VRDisplayPresentation::GetDOMLayers(nsTArray<dom::VRLayer>& result)
{
result = mDOMLayers;
}
VRDisplayPresentation::~VRDisplayPresentation()
{
DestroyLayers();
mDisplayClient->PresentationDestroyed();
}
void VRDisplayPresentation::SubmitFrame()
{
for (VRLayerChild *layer : mLayers) {
layer->SubmitFrame();
break; // Currently only one layer supported, submit only the first
}
}