1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef REMOTING_HOST_DESKTOP_RESIZER_H_
6 #define REMOTING_HOST_DESKTOP_RESIZER_H_
10 #include "base/memory/scoped_ptr.h"
11 #include "remoting/host/screen_resolution.h"
12 #include "third_party/skia/include/core/SkRect.h"
16 class DesktopResizer {
18 virtual ~DesktopResizer() {}
20 // Create a platform-specific DesktopResizer instance.
21 static scoped_ptr<DesktopResizer> Create();
23 // Return the current resolution of the desktop.
24 virtual ScreenResolution GetCurrentResolution() = 0;
26 // Get the list of supported resolutions, which should ideally include
27 // |preferred|. Implementations will generally do one of the following:
28 // 1. Return the list of resolutions supported by the underlying video
29 // driver, regardless of |preferred|.
30 // 2. Return a list containing just |preferred|, perhaps after imposing
31 // some minimum size constraint. This will typically be the case if
32 // there are no constraints imposed by the underlying video driver.
33 // 3. Return an empty list if resize is not supported.
34 virtual std::list<ScreenResolution> GetSupportedResolutions(
35 const ScreenResolution& preferred) = 0;
37 // Set the resolution of the desktop. |resolution| must be one of the
38 // resolutions previously returned by |GetSupportedResolutions|. Note that
39 // implementations should fail gracefully if the specified resolution is no
40 // longer supported, since monitor configurations may change on the fly.
41 virtual void SetResolution(const ScreenResolution& resolution) = 0;
43 // Restore the original desktop resolution. The caller must provide the
44 // original resolution of the desktop, as returned by |GetCurrentResolution|,
45 // as a hint. However, implementaions are free to ignore this. For example,
46 // virtual hosts will typically ignore it to avoid unnecessary resizes.
47 virtual void RestoreResolution(const ScreenResolution& original) = 0;
50 } // namespace remoting
52 #endif // REMOTING_HOST_DESKTOP_RESIZER_H_