chromium/third_party/webrtc/modules/desktop_capture/linux/x11/x_server_pixel_buffer.cc

/*
 *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#include "modules/desktop_capture/linux/x11/x_server_pixel_buffer.h"

#include <X11/Xutil.h>
#include <stdint.h>
#include <string.h>
#include <sys/ipc.h>
#include <sys/shm.h>

#include "modules/desktop_capture/desktop_frame.h"
#include "modules/desktop_capture/linux/x11/window_list_utils.h"
#include "modules/desktop_capture/linux/x11/x_error_trap.h"
#include "modules/desktop_capture/linux/x11/x_window_property.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"

namespace webrtc {

namespace {

// Returns the number of bits `mask` has to be shifted left so its last
// (most-significant) bit set becomes the most-significant bit of the word.
// When `mask` is 0 the function returns 31.
uint32_t MaskToShift(uint32_t mask) { … }

// Returns true if `image` is in RGB format.
bool IsXImageRGBFormat(XImage* image) { … }

// We expose two forms of blitting to handle variations in the pixel format.
// In FastBlit(), the operation is effectively a memcpy.
void FastBlit(XImage* x_image,
              uint8_t* src_pos,
              const DesktopRect& rect,
              DesktopFrame* frame) { … }

void SlowBlit(XImage* x_image,
              uint8_t* src_pos,
              const DesktopRect& rect,
              DesktopFrame* frame) { … }

}  // namespace

XServerPixelBuffer::XServerPixelBuffer() { … }

XServerPixelBuffer::~XServerPixelBuffer() { … }

void XServerPixelBuffer::Release() { … }

void XServerPixelBuffer::ReleaseSharedMemorySegment() { … }

bool XServerPixelBuffer::Init(XAtomCache* cache, Window window) { … }

void XServerPixelBuffer::InitShm(const XWindowAttributes& attributes) { … }

bool XServerPixelBuffer::InitPixmaps(int depth) { … }

bool XServerPixelBuffer::IsWindowValid() const { … }

void XServerPixelBuffer::Synchronize() { … }

bool XServerPixelBuffer::CaptureRect(const DesktopRect& rect,
                                     DesktopFrame* frame) { … }

}  // namespace webrtc