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/* -*- Mode: C++; tab-width: 4; 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 "WindowSurfaceProvider.h"
#include "gfxPlatformGtk.h"
#include "GtkCompositorWidget.h"
#include "mozilla/gfx/Logging.h"
#include "mozilla/layers/LayersTypes.h"
#include "nsWindow.h"
#include "mozilla/ScopeExit.h"
#ifdef MOZ_WAYLAND
# include "mozilla/StaticPrefs_widget.h"
# include "WindowSurfaceWaylandMultiBuffer.h"
#endif
#ifdef MOZ_X11
# include "mozilla/X11Util.h"
# include "WindowSurfaceX11Image.h"
# include "WindowSurfaceX11SHM.h"
#endif
#undef LOG
#ifdef MOZ_LOGGING
# include "mozilla/Logging.h"
# include "nsTArray.h"
# include "Units.h"
extern mozilla::LazyLogModule gWidgetLog;
# define LOG(args) MOZ_LOG(gWidgetLog, mozilla::LogLevel::Debug, args)
#else
# define LOG(args)
#endif /* MOZ_LOGGING */
namespace mozilla {
namespace widget {
using namespace mozilla::layers;
WindowSurfaceProvider::WindowSurfaceProvider()
: mWindowSurface(nullptr),
mMutex("WindowSurfaceProvider"),
mWindowSurfaceValid(false)
#ifdef MOZ_X11
,
mIsShaped(false),
mXDepth(0),
mXWindow(0),
mXVisual(nullptr)
#endif
{
}
WindowSurfaceProvider::~WindowSurfaceProvider() {
#ifdef MOZ_WAYLAND
MOZ_DIAGNOSTIC_ASSERT(!mWidget,
"nsWindow reference is still live, we're leaking it!");
#endif
#ifdef MOZ_X11
MOZ_DIAGNOSTIC_ASSERT(!mXWindow, "mXWindow should be released on quit!");
#endif
}
#ifdef MOZ_WAYLAND
bool WindowSurfaceProvider::Initialize(RefPtr<nsWindow> aWidget) {
mWindowSurfaceValid = false;
mWidget = std::move(aWidget);
return true;
}
bool WindowSurfaceProvider::Initialize(GtkCompositorWidget* aCompositorWidget) {
mWindowSurfaceValid = false;
mCompositorWidget = aCompositorWidget;
mWidget = static_cast<nsWindow*>(aCompositorWidget->RealWidget());
return true;
}
#endif
#ifdef MOZ_X11
bool WindowSurfaceProvider::Initialize(Window aWindow, bool aIsShaped) {
mWindowSurfaceValid = false;
// Grab the window's visual and depth
XWindowAttributes windowAttrs;
if (!XGetWindowAttributes(DefaultXDisplay(), aWindow, &windowAttrs)) {
NS_WARNING("GtkCompositorWidget(): XGetWindowAttributes() failed!");
return false;
}
mXWindow = aWindow;
mXVisual = windowAttrs.visual;
mXDepth = windowAttrs.depth;
mIsShaped = aIsShaped;
return true;
}
#endif
void WindowSurfaceProvider::CleanupResources() {
MutexAutoLock lock(mMutex);
mWindowSurfaceValid = false;
#ifdef MOZ_WAYLAND
mWidget = nullptr;
#endif
#ifdef MOZ_X11
mXWindow = 0;
mXVisual = 0;
mXDepth = 0;
mIsShaped = false;
#endif
}
RefPtr<WindowSurface> WindowSurfaceProvider::CreateWindowSurface() {
#ifdef MOZ_WAYLAND
if (GdkIsWaylandDisplay()) {
// We're called too early or we're unmapped.
if (!mWidget) {
return nullptr;
}
return MakeRefPtr<WindowSurfaceWaylandMB>(mWidget, mCompositorWidget);
}
#endif
#ifdef MOZ_X11
if (GdkIsX11Display()) {
// We're called too early or we're unmapped.
if (!mXWindow) {
return nullptr;
}
// Blit to the window with the following priority:
// 1. MIT-SHM
// 2. XPutImage
# ifdef MOZ_HAVE_SHMIMAGE
if (!mIsShaped && nsShmImage::UseShm()) {
LOG(("Drawing to Window 0x%lx will use MIT-SHM\n", (Window)mXWindow));
return MakeRefPtr<WindowSurfaceX11SHM>(DefaultXDisplay(), mXWindow,
mXVisual, mXDepth);
}
# endif // MOZ_HAVE_SHMIMAGE
LOG(("Drawing to Window 0x%lx will use XPutImage\n", (Window)mXWindow));
return MakeRefPtr<WindowSurfaceX11Image>(DefaultXDisplay(), mXWindow,
mXVisual, mXDepth, mIsShaped);
}
#endif
MOZ_RELEASE_ASSERT(false);
}
// We need to ignore thread safety checks here. We need to hold mMutex
// between StartRemoteDrawingInRegion()/EndRemoteDrawingInRegion() calls
// which confuses it.
MOZ_PUSH_IGNORE_THREAD_SAFETY
already_AddRefed<gfx::DrawTarget>
WindowSurfaceProvider::StartRemoteDrawingInRegion(
const LayoutDeviceIntRegion& aInvalidRegion,
layers::BufferMode* aBufferMode) {
if (aInvalidRegion.IsEmpty()) {
return nullptr;
}
// We return a reference to mWindowSurface inside draw target so we need to
// hold the mutex untill EndRemoteDrawingInRegion() call where draw target
// is returned.
// If we return null dt, EndRemoteDrawingInRegion() won't be called to
// release mutex.
mMutex.Lock();
auto unlockMutex = MakeScopeExit([&] { mMutex.Unlock(); });
if (!mWindowSurfaceValid) {
mWindowSurface = nullptr;
mWindowSurfaceValid = true;
}
if (!mWindowSurface) {
mWindowSurface = CreateWindowSurface();
if (!mWindowSurface) {
return nullptr;
}
}
*aBufferMode = BufferMode::BUFFER_NONE;
RefPtr<gfx::DrawTarget> dt = mWindowSurface->Lock(aInvalidRegion);
#ifdef MOZ_X11
if (!dt && GdkIsX11Display() && !mWindowSurface->IsFallback()) {
// We can't use WindowSurfaceX11Image fallback on Wayland but
// Lock() call on WindowSurfaceWayland should never fail.
gfxWarningOnce()
<< "Failed to lock WindowSurface, falling back to XPutImage backend.";
mWindowSurface = MakeRefPtr<WindowSurfaceX11Image>(
DefaultXDisplay(), mXWindow, mXVisual, mXDepth, mIsShaped);
dt = mWindowSurface->Lock(aInvalidRegion);
}
#endif
if (dt) {
// We have valid dt, mutex will be released in EndRemoteDrawingInRegion().
unlockMutex.release();
}
return dt.forget();
}
void WindowSurfaceProvider::EndRemoteDrawingInRegion(
gfx::DrawTarget* aDrawTarget, const LayoutDeviceIntRegion& aInvalidRegion) {
// Unlock mutex from StartRemoteDrawingInRegion().
mMutex.AssertCurrentThreadOwns();
auto unlockMutex = MakeScopeExit([&] { mMutex.Unlock(); });
// Commit to mWindowSurface only if we have a valid one.
if (!mWindowSurface || !mWindowSurfaceValid) {
return;
}
#if defined(MOZ_WAYLAND)
if (GdkIsWaylandDisplay()) {
// We're called too early or we're unmapped.
// Don't draw anything.
if (!mWidget || !mWidget->IsMapped()) {
return;
}
if (moz_container_wayland_is_commiting_to_parent(
mWidget->GetMozContainer())) {
// If we're drawing directly to wl_surface owned by Gtk we need to use it
// in main thread to sync with Gtk access to it.
NS_DispatchToMainThread(NS_NewRunnableFunction(
"WindowSurfaceProvider::EndRemoteDrawingInRegion",
[widget = RefPtr{mWidget}, this, aInvalidRegion]() {
if (!widget->IsMapped()) {
return;
}
MutexAutoLock lock(mMutex);
// Commit to mWindowSurface only when we have a valid one.
if (mWindowSurface && mWindowSurfaceValid) {
mWindowSurface->Commit(aInvalidRegion);
}
}));
return;
}
}
#endif
mWindowSurface->Commit(aInvalidRegion);
}
MOZ_POP_THREAD_SAFETY
} // namespace widget
} // namespace mozilla
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