From ad18d877ddd2a44d98fa12ccd3dbbcf4d0ac4299 Mon Sep 17 00:00:00 2001 From: "Matt A. Tobin" Date: Fri, 2 Feb 2018 04:16:08 -0500 Subject: Add m-esr52 at 52.6.0 --- widget/WindowSurface.h | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 widget/WindowSurface.h (limited to 'widget/WindowSurface.h') diff --git a/widget/WindowSurface.h b/widget/WindowSurface.h new file mode 100644 index 000000000..3c6ed923e --- /dev/null +++ b/widget/WindowSurface.h @@ -0,0 +1,37 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- + * + * 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/. */ + +#ifndef _MOZILLA_WIDGET_WINDOW_SURFACE_H +#define _MOZILLA_WIDGET_WINDOW_SURFACE_H + +#include "mozilla/gfx/2D.h" +#include "Units.h" + +namespace mozilla { +namespace widget { + +// A class for drawing to double-buffered windows. +class WindowSurface { +public: + virtual ~WindowSurface() {} + + // Locks a region of the window for drawing, returning a draw target + // capturing the bounds of the provided region. + // Implementations must permit invocation from any thread. + virtual already_AddRefed Lock(const LayoutDeviceIntRegion& aRegion) = 0; + + // Swaps the provided invalid region from the back buffer to the window. + // Implementations must permit invocation from any thread. + virtual void Commit(const LayoutDeviceIntRegion& aInvalidRegion) = 0; + + // Whether the window surface represents a fallback method. + virtual bool IsFallback() const { return false; } +}; + +} // namespace widget +} // namespace mozilla + +#endif // _MOZILLA_WIDGET_WINDOW_SURFACE_H -- cgit v1.2.3