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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.
#ifndef REMOTING_HOST_DESKTOP_RESIZER_H_
#define REMOTING_HOST_DESKTOP_RESIZER_H_
#include <list>
#include "base/memory/scoped_ptr.h"
#include "third_party/skia/include/core/SkRect.h"
namespace remoting {
class DesktopResizer {
public:
virtual ~DesktopResizer() {}
// Create a platform-specific DesktopResizer instance.
static scoped_ptr<DesktopResizer> Create();
// Return the current size of the desktop.
virtual SkISize GetCurrentSize() = 0;
// Get the list of supported sizes, which should ideally include |preferred|.
// Implementations will generally do one of the following:
// 1. Return the list of sizes 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<SkISize> GetSupportedSizes(const SkISize& preferred) = 0;
// Set the size of the desktop. |size| must be one of the sizes previously
// returned by |GetSupportedSizes|. Note that implementations should fail
// gracefully if the specified size is no longer supported, since monitor
// configurations may change on the fly.
virtual void SetSize(const SkISize& size) = 0;
// Restore the original desktop size. The caller must provide the original
// size of the desktop, as returned by |GetCurrentSize|, as a hint. However,
// implementaions are free to ignore this. For example, virtual hosts will
// typically ignore it to avoid unnecessary resize operations.
virtual void RestoreSize(const SkISize& original) = 0;
};
} // namespace remoting
#endif // REMOTING_HOST_DESKTOP_RESIZER_H_
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