Source code

Revision control

Copy as Markdown

Other Tools

/* -*- 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 */
#ifndef mozilla_layers_MatrixMessage_h
#define mozilla_layers_MatrixMessage_h
#include "mozilla/Maybe.h"
#include "mozilla/gfx/Matrix.h"
#include "mozilla/layers/LayersTypes.h"
#include "Units.h" // for ScreenRect
#include "UnitTransforms.h"
namespace mozilla {
namespace layers {
class MatrixMessage {
// Don't use this one directly
MatrixMessage() = default;
MatrixMessage(const Maybe<LayerToScreenMatrix4x4>& aMatrix,
const ScreenRect& aTopLevelViewportVisibleRectInBrowserCoords,
const LayersId& aLayersId)
: mMatrix(ToUnknownMatrix(aMatrix)),
mLayersId(aLayersId) {}
inline Maybe<LayerToScreenMatrix4x4> GetMatrix() const {
return LayerToScreenMatrix4x4::FromUnknownMatrix(mMatrix);
inline ScreenRect GetTopLevelViewportVisibleRectInBrowserCoords() const {
return mTopLevelViewportVisibleRectInBrowserCoords;
inline const LayersId& GetLayersId() const { return mLayersId; }
bool operator==(const MatrixMessage& aOther) const {
return aOther.mMatrix == mMatrix &&
aOther.mTopLevelViewportVisibleRectInBrowserCoords ==
mTopLevelViewportVisibleRectInBrowserCoords &&
aOther.mLayersId == mLayersId;
bool operator!=(const MatrixMessage& aOther) const {
return !(*this == aOther);
// Fields are public for IPC. Don't access directly
// elsewhere.
// Transform matrix to convert this layer to screen coordinate.
Maybe<gfx::Matrix4x4> mMatrix; // Untyped for IPC
// The remote iframe document rectangle corresponding to this layer.
// The rectangle is the result of clipped out by ancestor async scrolling so
// that the rectangle will be empty if it's completely scrolled out of view.
ScreenRect mTopLevelViewportVisibleRectInBrowserCoords;
LayersId mLayersId;
}; // namespace layers
}; // namespace mozilla
#endif // mozilla_layers_MatrixMessage_h