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cec4343fb4
Bug: webrtc:12338 Change-Id: I300ba78fc4423db7030e555d7e51d2cb2246e9a4 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/227162 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Artem Titov <titovartem@webrtc.org> Cr-Commit-Position: refs/heads/master@{#34678}
89 lines
2.9 KiB
C++
89 lines
2.9 KiB
C++
/*
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* Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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// Don't include this file in any .h files because it pulls in some X headers.
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#ifndef MODULES_DESKTOP_CAPTURE_LINUX_X_SERVER_PIXEL_BUFFER_H_
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#define MODULES_DESKTOP_CAPTURE_LINUX_X_SERVER_PIXEL_BUFFER_H_
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#include <X11/Xutil.h>
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#include <X11/extensions/XShm.h>
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#include <memory>
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#include <vector>
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#include "modules/desktop_capture/desktop_geometry.h"
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#include "rtc_base/constructor_magic.h"
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namespace webrtc {
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class DesktopFrame;
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class XAtomCache;
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// A class to allow the X server's pixel buffer to be accessed as efficiently
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// as possible.
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class XServerPixelBuffer {
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public:
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XServerPixelBuffer();
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~XServerPixelBuffer();
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void Release();
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// Allocate (or reallocate) the pixel buffer for `window`. Returns false in
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// case of an error (e.g. window doesn't exist).
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bool Init(XAtomCache* cache, Window window);
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bool is_initialized() { return window_ != 0; }
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// Returns the size of the window the buffer was initialized for.
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DesktopSize window_size() { return window_rect_.size(); }
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// Returns the rectangle of the window the buffer was initialized for.
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const DesktopRect& window_rect() { return window_rect_; }
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// Returns true if the window can be found.
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bool IsWindowValid() const;
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// If shared memory is being used without pixmaps, synchronize this pixel
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// buffer with the root window contents (otherwise, this is a no-op).
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// This is to avoid doing a full-screen capture for each individual
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// rectangle in the capture list, when it only needs to be done once at the
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// beginning.
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void Synchronize();
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// Capture the specified rectangle and stores it in the `frame`. In the case
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// where the full-screen data is captured by Synchronize(), this simply
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// returns the pointer without doing any more work. The caller must ensure
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// that `rect` is not larger than window_size().
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bool CaptureRect(const DesktopRect& rect, DesktopFrame* frame);
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private:
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void ReleaseSharedMemorySegment();
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void InitShm(const XWindowAttributes& attributes);
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bool InitPixmaps(int depth);
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Display* display_ = nullptr;
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Window window_ = 0;
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DesktopRect window_rect_;
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XImage* x_image_ = nullptr;
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XShmSegmentInfo* shm_segment_info_ = nullptr;
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XImage* x_shm_image_ = nullptr;
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Pixmap shm_pixmap_ = 0;
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GC shm_gc_ = nullptr;
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bool xshm_get_image_succeeded_ = false;
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std::vector<uint8_t> icc_profile_;
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RTC_DISALLOW_COPY_AND_ASSIGN(XServerPixelBuffer);
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};
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} // namespace webrtc
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#endif // MODULES_DESKTOP_CAPTURE_LINUX_X_SERVER_PIXEL_BUFFER_H_
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