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/* -*- Mode: C++; tab-width: 2; 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 */
#ifndef mozilla_layers_SurfacePool_h
#define mozilla_layers_SurfacePool_h
#include "mozilla/Maybe.h"
#include "mozilla/ThreadSafeWeakPtr.h"
#include "GLTypes.h"
#include "nsISupportsImpl.h"
#include "nsRegion.h"
namespace mozilla {
namespace gl {
class GLContext;
} // namespace gl
namespace layers {
class SurfacePoolHandle;
// A pool of surfaces for NativeLayers. Manages GL resources. Since GLContexts
// are bound to their creator thread, a pool should not be shared across
// threads. Call Create() to create an instance. Call GetHandleForGL() to obtain
// a handle that can be passed to NativeLayerRoot::CreateLayer.
class SurfacePool {
#if defined(XP_MACOSX) || defined(MOZ_WAYLAND)
static RefPtr<SurfacePool> Create(size_t aPoolSizeLimit);
// aGL can be nullptr.
virtual RefPtr<SurfacePoolHandle> GetHandleForGL(gl::GLContext* aGL) = 0;
virtual void DestroyGLResourcesForContext(gl::GLContext* aGL) = 0;
virtual ~SurfacePool() = default;
class SurfacePoolHandleCA;
class SurfacePoolHandleWayland;
// A handle to the process-wide surface pool. Users should create one handle per
// OS window, and call OnBeginFrame() and OnEndFrame() on the handle at
// appropriate times. OnBeginFrame() and OnEndFrame() should be called on the
// thread that the surface pool was created on.
// These handles are stored on NativeLayers that are created with them and keep
// the SurfacePool alive.
class SurfacePoolHandle {
virtual SurfacePoolHandleCA* AsSurfacePoolHandleCA() { return nullptr; }
virtual SurfacePoolHandleWayland* AsSurfacePoolHandleWayland() {
return nullptr;
virtual RefPtr<SurfacePool> Pool() = 0;
// Should be called every frame, in order to do rate-limited cleanup tasks.
virtual void OnBeginFrame() = 0;
virtual void OnEndFrame() = 0;
virtual ~SurfacePoolHandle() = default;
} // namespace layers
} // namespace mozilla
#endif // mozilla_layers_SurfacePool_h