//[-------------------------------------------------------]
//[ Private virtual PLScene::SNMTransformGizmo functions ]
//[-------------------------------------------------------]
void SNMTransformGizmoRotationController::UpdateSelection(Renderer &cRenderer, const VisNode &cVisNode)
{
// Get the frontend instance
Frontend &cFrontend = static_cast<FrontendApplication*>(CoreApplication::GetApplication())->GetFrontend();
// Check whether or not the mouse is currently over the frontend
if (cFrontend.IsMouseOver()) {
// Get current mouse cursor position inside the widget
const int nMousePosX = cFrontend.GetMousePositionX();
const int nMousePosY = cFrontend.GetMousePositionY();
// Calculate the clip space to object space matrix
Matrix4x4 mClipSpaceToObjectSpace = m_mObjectSpaceToClipSpace;
mClipSpaceToObjectSpace.Invert();
// Check where the mouse is over
// Get the ray starting from the camera position in direction of the mouse position
Vector3 v2DPos(static_cast<float>(nMousePosX), static_cast<float>(nMousePosY), 0.0001f);
Vector3 vCamPos = v2DPos.To3DCoordinate(mClipSpaceToObjectSpace, cRenderer.GetViewport());
v2DPos.z = 0.9999f;
Vector3 vEndPos = v2DPos.To3DCoordinate(mClipSpaceToObjectSpace, cRenderer.GetViewport());
// Determine the current selected axis by using a picking ray
Ray cRay;
cRay.Set(vCamPos, vEndPos);
m_nSelected = DetermineSelected(cRay);
} else {
m_nSelected = 0;
}
}
void
VRDisplayOpenVR::UpdateEyeParameters(gfx::Matrix4x4* aHeadToEyeTransforms /* = nullptr */)
{
// Note this must be called every frame, as the IPD adjustment can be changed
// by the user during a VR session.
for (uint32_t eye = 0; eye < VRDisplayState::NumEyes; eye++) {
::vr::HmdMatrix34_t eyeToHead = mVRSystem->GetEyeToHeadTransform(static_cast<::vr::Hmd_Eye>(eye));
mDisplayInfo.mDisplayState.mEyeTranslation[eye].x = eyeToHead.m[0][3];
mDisplayInfo.mDisplayState.mEyeTranslation[eye].y = eyeToHead.m[1][3];
mDisplayInfo.mDisplayState.mEyeTranslation[eye].z = eyeToHead.m[2][3];
if (aHeadToEyeTransforms) {
Matrix4x4 pose;
// NOTE! eyeToHead.m is a 3x4 matrix, not 4x4. But
// because of its arrangement, we can copy the 12 elements in and
// then transpose them to the right place.
memcpy(&pose._11, &eyeToHead.m, sizeof(eyeToHead.m));
pose.Transpose();
pose.Invert();
aHeadToEyeTransforms[eye] = pose;
}
}
}
void
LayerManagerComposite::PostProcessLayers(Layer* aLayer,
nsIntRegion& aOpaqueRegion,
LayerIntRegion& aVisibleRegion,
const Maybe<ParentLayerIntRect>& aClipFromAncestors)
{
if (aLayer->Extend3DContext()) {
// For layers participating 3D rendering context, their visible
// region should be empty (invisible), so we pass through them
// without doing anything.
// Direct children of the establisher may have a clip, becaue the
// item containing it; ex. of nsHTMLScrollFrame, may give it one.
Maybe<ParentLayerIntRect> layerClip =
aLayer->AsHostLayer()->GetShadowClipRect();
Maybe<ParentLayerIntRect> ancestorClipForChildren =
IntersectMaybeRects(layerClip, aClipFromAncestors);
MOZ_ASSERT(!layerClip || !aLayer->Combines3DTransformWithAncestors(),
"Only direct children of the establisher could have a clip");
for (Layer* child = aLayer->GetLastChild();
child;
child = child->GetPrevSibling()) {
PostProcessLayers(child, aOpaqueRegion, aVisibleRegion,
ancestorClipForChildren);
}
return;
}
nsIntRegion localOpaque;
// Treat layers on the path to the root of the 3D rendering context as
// a giant layer if it is a leaf.
Matrix4x4 transform = GetAccTransformIn3DContext(aLayer);
Matrix transform2d;
Maybe<IntPoint> integerTranslation;
// If aLayer has a simple transform (only an integer translation) then we
// can easily convert aOpaqueRegion into pre-transform coordinates and include
// that region.
if (transform.Is2D(&transform2d)) {
if (transform2d.IsIntegerTranslation()) {
integerTranslation = Some(IntPoint::Truncate(transform2d.GetTranslation()));
localOpaque = aOpaqueRegion;
localOpaque.MoveBy(-*integerTranslation);
}
}
// Compute a clip that's the combination of our layer clip with the clip
// from our ancestors.
LayerComposite* composite = static_cast<LayerComposite*>(aLayer->AsHostLayer());
Maybe<ParentLayerIntRect> layerClip = composite->GetShadowClipRect();
MOZ_ASSERT(!layerClip || !aLayer->Combines3DTransformWithAncestors(),
"The layer with a clip should not participate "
"a 3D rendering context");
Maybe<ParentLayerIntRect> outsideClip =
IntersectMaybeRects(layerClip, aClipFromAncestors);
// Convert the combined clip into our pre-transform coordinate space, so
// that it can later be intersected with our visible region.
// If our transform is a perspective, there's no meaningful insideClip rect
// we can compute (it would need to be a cone).
Maybe<LayerIntRect> insideClip;
if (outsideClip && !transform.HasPerspectiveComponent()) {
Matrix4x4 inverse = transform;
if (inverse.Invert()) {
Maybe<LayerRect> insideClipFloat =
UntransformBy(ViewAs<ParentLayerToLayerMatrix4x4>(inverse),
ParentLayerRect(*outsideClip),
LayerRect::MaxIntRect());
if (insideClipFloat) {
insideClipFloat->RoundOut();
LayerIntRect insideClipInt;
if (insideClipFloat->ToIntRect(&insideClipInt)) {
insideClip = Some(insideClipInt);
}
}
}
}
Maybe<ParentLayerIntRect> ancestorClipForChildren;
if (insideClip) {
ancestorClipForChildren =
Some(ViewAs<ParentLayerPixel>(*insideClip, PixelCastJustification::MovingDownToChildren));
}
// Save the value of localOpaque, which currently stores the region obscured
// by siblings (and uncles and such), before our descendants contribute to it.
nsIntRegion obscured = localOpaque;
// Recurse on our descendants, in front-to-back order. In this process:
// - Occlusions are computed for them, and they contribute to localOpaque.
// - They recalculate their visible regions, taking ancestorClipForChildren
// into account, and accumulate them into descendantsVisibleRegion.
LayerIntRegion descendantsVisibleRegion;
bool hasPreserve3DChild = false;
for (Layer* child = aLayer->GetLastChild(); child; child = child->GetPrevSibling()) {
PostProcessLayers(child, localOpaque, descendantsVisibleRegion, ancestorClipForChildren);
if (child->Extend3DContext()) {
hasPreserve3DChild = true;
}
}
// Recalculate our visible region.
LayerIntRegion visible = composite->GetShadowVisibleRegion();
// If we have descendants, throw away the visible region stored on this
// layer, and use the region accumulated by our descendants instead.
if (aLayer->GetFirstChild() && !hasPreserve3DChild) {
visible = descendantsVisibleRegion;
}
// Subtract any areas that we know to be opaque.
if (!obscured.IsEmpty()) {
visible.SubOut(LayerIntRegion::FromUnknownRegion(obscured));
}
// Clip the visible region using the combined clip.
if (insideClip) {
visible.AndWith(*insideClip);
}
composite->SetShadowVisibleRegion(visible);
// Transform the newly calculated visible region into our parent's space,
// apply our clip to it (if any), and accumulate it into |aVisibleRegion|
// for the caller to use.
ParentLayerIntRegion visibleParentSpace = TransformBy(
ViewAs<LayerToParentLayerMatrix4x4>(transform), visible);
if (const Maybe<ParentLayerIntRect>& clipRect = composite->GetShadowClipRect()) {
visibleParentSpace.AndWith(*clipRect);
}
aVisibleRegion.OrWith(ViewAs<LayerPixel>(visibleParentSpace,
PixelCastJustification::MovingDownToChildren));
// If we have a simple transform, then we can add our opaque area into
// aOpaqueRegion.
if (integerTranslation &&
!aLayer->HasMaskLayers() &&
aLayer->IsOpaqueForVisibility()) {
if (aLayer->IsOpaque()) {
localOpaque.OrWith(composite->GetFullyRenderedRegion());
}
localOpaque.MoveBy(*integerTranslation);
if (layerClip) {
localOpaque.AndWith(layerClip->ToUnknownRect());
}
aOpaqueRegion.OrWith(localOpaque);
}
}
void Node::SetTransformation(const Matrix4x4& transformation) {
transformation_ = transformation;
transformation_inverse_ = transformation.Invert();
}
static void
ApplyAsyncTransformToScrollbarForContent(ContainerLayer* aScrollbar,
Layer* aContent, bool aScrollbarIsChild)
{
// We only apply the transform if the scroll-target layer has non-container
// children (i.e. when it has some possibly-visible content). This is to
// avoid moving scroll-bars in the situation that only a scroll information
// layer has been built for a scroll frame, as this would result in a
// disparity between scrollbars and visible content.
if (aContent->AsContainerLayer() &&
!LayerHasNonContainerDescendants(aContent->AsContainerLayer())) {
return;
}
const FrameMetrics& metrics = aContent->GetFrameMetrics();
AsyncPanZoomController* apzc = aContent->GetAsyncPanZoomController();
Matrix4x4 asyncTransform = apzc->GetCurrentAsyncTransform();
Matrix4x4 nontransientTransform = apzc->GetNontransientAsyncTransform();
Matrix4x4 nontransientUntransform = nontransientTransform;
nontransientUntransform.Invert();
Matrix4x4 transientTransform = asyncTransform * nontransientUntransform;
// |transientTransform| represents the amount by which we have scrolled and
// zoomed since the last paint. Because the scrollbar was sized and positioned based
// on the painted content, we need to adjust it based on transientTransform so that
// it reflects what the user is actually seeing now.
// - The scroll thumb needs to be scaled in the direction of scrolling by the inverse
// of the transientTransform scale (representing the zoom). This is because zooming
// in decreases the fraction of the whole scrollable rect that is in view.
// - It needs to be translated in opposite direction of the transientTransform
// translation (representing the scroll). This is because scrolling down, which
// translates the layer content up, should result in moving the scroll thumb down.
// The amount of the translation to the scroll thumb should be such that the ratio
// of the translation to the size of the scroll port is the same as the ratio
// of the scroll amount to the size of the scrollable rect.
Matrix4x4 scrollbarTransform;
if (aScrollbar->GetScrollbarDirection() == Layer::VERTICAL) {
float scale = metrics.CalculateCompositedSizeInCssPixels().height / metrics.mScrollableRect.height;
scrollbarTransform = scrollbarTransform * Matrix4x4().Scale(1.f, 1.f / transientTransform._22, 1.f);
scrollbarTransform = scrollbarTransform * Matrix4x4().Translate(0, -transientTransform._42 * scale, 0);
}
if (aScrollbar->GetScrollbarDirection() == Layer::HORIZONTAL) {
float scale = metrics.CalculateCompositedSizeInCssPixels().width / metrics.mScrollableRect.width;
scrollbarTransform = scrollbarTransform * Matrix4x4().Scale(1.f / transientTransform._11, 1.f, 1.f);
scrollbarTransform = scrollbarTransform * Matrix4x4().Translate(-transientTransform._41 * scale, 0, 0);
}
Matrix4x4 transform = scrollbarTransform * aScrollbar->GetTransform();
if (aScrollbarIsChild) {
// If the scrollbar layer is a child of the content it is a scrollbar for, then we
// need to do an extra untransform to cancel out the transient async transform on
// the content. This is needed because otherwise that transient async transform is
// part of the effective transform of this scrollbar, and the scrollbar will jitter
// as the content scrolls.
transientTransform.Invert();
transform = transform * transientTransform;
}
// GetTransform already takes the pre- and post-scale into account. Since we
// will apply the pre- and post-scale again when computing the effective
// transform, we must apply the inverses here.
transform.Scale(1.0f/aScrollbar->GetPreXScale(),
1.0f/aScrollbar->GetPreYScale(),
1);
transform = transform * Matrix4x4().Scale(1.0f/aScrollbar->GetPostXScale(),
1.0f/aScrollbar->GetPostYScale(),
1);
aScrollbar->AsLayerComposite()->SetShadowTransform(transform);
}
