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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <list>
#include <memory>
#include "remoting/host/screen_resolution.h"
namespace remoting {
class DesktopResizer {
virtual ~DesktopResizer() {}
// Create a platform-specific DesktopResizer instance.
static std::unique_ptr<DesktopResizer> Create();
// Return the current resolution of the desktop.
virtual ScreenResolution GetCurrentResolution() = 0;
// Get the list of supported resolutions, which should ideally include
// |preferred|. Implementations will generally do one of the following:
// 1. Return the list of resolutions supported by the underlying video
// driver, regardless of |preferred|.
// 2. Return a list containing just |preferred|, perhaps after imposing
// some minimum size constraint. This will typically be the case if
// there are no constraints imposed by the underlying video driver.
// 3. Return an empty list if resize is not supported.
virtual std::list<ScreenResolution> GetSupportedResolutions(
const ScreenResolution& preferred) = 0;
// Set the resolution of the desktop. |resolution| must be one of the
// resolutions previously returned by |GetSupportedResolutions|. Note that
// implementations should fail gracefully if the specified resolution is no
// longer supported, since monitor configurations may change on the fly.
virtual void SetResolution(const ScreenResolution& resolution) = 0;
// Restore the original desktop resolution. The caller must provide the
// original resolution of the desktop, as returned by |GetCurrentResolution|,
// as a hint. However, implementaions are free to ignore this. For example,
// virtual hosts will typically ignore it to avoid unnecessary resizes.
virtual void RestoreResolution(const ScreenResolution& original) = 0;
} // namespace remoting