Move screen capturers from remoting/capturer to media/video/capturer/screen

remoting/capturer/linux/x_server_pixel_buffer.h

-// 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.
-
-// Don't include this file in any .h files because it pulls in some X headers.
-
-#ifndef REMOTING_CAPTURER_LINUX_X_SERVER_PIXEL_BUFFER_H_
-#define REMOTING_CAPTURER_LINUX_X_SERVER_PIXEL_BUFFER_H_
-
-#include "base/basictypes.h"
-#include "third_party/skia/include/core/SkRect.h"
-
-#include <X11/Xutil.h>
-#include <X11/extensions/XShm.h>
-
-namespace remoting {
-
-// A class to allow the X server's pixel buffer to be accessed as efficiently
-// as possible.
-class XServerPixelBuffer {
- public:
-  XServerPixelBuffer();
-  ~XServerPixelBuffer();
-
-  void Release();
-
-  // Allocate (or reallocate) the pixel buffer with the given size, which is
-  // assumed to be the current size of the root window.
-  // |screen_size| should either come from GetRootWindowSize(), or
-  // from a recent ConfigureNotify event on the root window.
-  void Init(Display* display, const SkISize& screen_size);
-
-  // Request the current size of the root window from the X Server.
-  static SkISize GetRootWindowSize(Display* display);
-
-  // If shared memory is being used without pixmaps, synchronize this pixel
-  // buffer with the root window contents (otherwise, this is a no-op).
-  // This is to avoid doing a full-screen capture for each individual
-  // rectangle in the capture list, when it only needs to be done once at the
-  // beginning.
-  void Synchronize();
-
-  // Capture the specified rectangle and return a pointer to its top-left pixel
-  // or NULL if capture fails. The returned pointer remains valid until the next
-  // call to CaptureRect.
-  // In the case where the full-screen data is captured by Synchronize(), this
-  // simply returns the pointer without doing any more work.
-  // The caller must ensure that |rect| is no larger than the screen size
-  // supplied to Init().
-  uint8* CaptureRect(const SkIRect& rect);
-
-  // Return information about the most recent capture. This is only guaranteed
-  // to be valid between CaptureRect calls.
-  int GetStride() const;
-  int GetDepth() const;
-  int GetBitsPerPixel() const;
-  int GetRedMask() const;
-  int GetBlueMask() const;
-  int GetGreenMask() const;
-  int GetRedShift() const;
-  int GetBlueShift() const;
-  int GetGreenShift() const;
-  bool IsRgb() const;
-
- private:
-  void InitShm(int screen);
-  bool InitPixmaps(int depth);
-
-  Display* display_;
-  Window root_window_;
-  SkISize root_window_size_;
-  XImage* x_image_;
-  XShmSegmentInfo* shm_segment_info_;
-  Pixmap shm_pixmap_;
-  GC shm_gc_;
-
-  DISALLOW_COPY_AND_ASSIGN(XServerPixelBuffer);
-};
-
-}  // namespace remoting
-
-#endif  // REMOTING_CAPTURER_LINUX_X_SERVER_PIXEL_BUFFER_H_