yuanyuanxiang/SimpleRemoter
0
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 5 Wiki Activity

Feat: window capture via PrintWindow with server-side HWND routing by clientID

Browse Source
This commit is contained in:
yuanyuanxiang
2026-06-15 13:08:23 +02:00
parent 5757ec7965
commit d3b9e7faae
16 changed files with 210 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

84
client/ScreenSpy.cpp
View File

@@ -12,12 +12,34 @@
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CScreenSpy::CScreenSpy(ULONG ulbiBitCount, BYTE algo, BOOL vDesk, int gop, BOOL all, int level,
RECT rc, BOOL switchScreen) :
CScreenSpy::CScreenSpy(ULONG ulbiBitCount, BYTE algo, BOOL vDesk, int gop, BOOL all, int level,
RECT rc, BOOL switchScreen, HWND hwnd) :
ScreenCapture(ulbiBitCount, algo, all, level, rc, switchScreen)
{
m_hTargetWnd = hwnd;
m_GOP = gop;
// 窗口捕获模式：用 DWM 真实边界覆盖基类的全屏尺寸，并缓存阴影偏移量
if (hwnd) {
RECT wndRc = {}, frameRc = {};
GetWindowRect(hwnd, &wndRc);
if (SUCCEEDED(DwmGetWindowAttribute(hwnd, DWMWA_EXTENDED_FRAME_BOUNDS, &frameRc, sizeof(frameRc)))) {
m_ShadowLeft = frameRc.left - wndRc.left;
m_ShadowTop = frameRc.top - wndRc.top;
} else {
frameRc = wndRc;
}
m_ulFullWidth = frameRc.right - frameRc.left;
m_ulFullHeight = frameRc.bottom - frameRc.top;
m_CachedWndW = wndRc.right - wndRc.left;
m_CachedWndH = wndRc.bottom - wndRc.top;
m_iScreenX = frameRc.left; // 窗口左上角在屏幕上的绝对坐标，供 PointConversion 使用
m_iScreenY = frameRc.top;
m_bZoomed = false;
Mprintf("CScreenSpy: 窗口捕获 HWND=%p 尺寸=%dx%d shadow=(%d,%d)\n",
hwnd, m_ulFullWidth, m_ulFullHeight, m_ShadowLeft, m_ShadowTop);
}
m_BitmapInfor_Full = ConstructBitmapInfo(ulbiBitCount, m_ulFullWidth, m_ulFullHeight);
iniFile cfg(CLIENT_PATH);
@@ -138,6 +160,64 @@ LPBYTE CScreenSpy::GetFirstScreenData(ULONG* ulFirstScreenLength)
VOID CScreenSpy::ScanScreen(HDC hdcDest, HDC hdcSour, ULONG ulWidth, ULONG ulHeight)
{
if (m_hTargetWnd) {
// 最小化：不绘制，hdcDest 保留上一帧内容（远程端看到冻结画面）
if (IsIconic(m_hTargetWnd)) return;
// 检测窗口尺寸变化：GetWindowRect 廉价，每帧调用；
// DwmGetWindowAttribute 较重，仅在 GetWindowRect 尺寸稳定后才调用。
// 防抖策略：拖拽 resize 期间尺寸持续变化，冻结画面等待稳定 300ms 后再重建，
// 避免拖拽过程中每帧重建 DIBSection / 重发 BitmapInfo / 重置编解码器。
static const DWORD RESIZE_DEBOUNCE_MS = 300;
RECT fullRc = {};
GetWindowRect(m_hTargetWnd, &fullRc);
// 窗口每帧都可能移动，实时更新屏幕偏移，保证 PointConversion 坐标正确
m_iScreenX = fullRc.left + m_ShadowLeft;
m_iScreenY = fullRc.top + m_ShadowTop;
int w = fullRc.right - fullRc.left;
int h = fullRc.bottom - fullRc.top;
if (w != m_CachedWndW || h != m_CachedWndH) {
// 尺寸有变化：更新防抖记录
if (w != m_PendingWndW || h != m_PendingWndH) {
m_PendingWndW = w;
m_PendingWndH = h;
m_SizeChangeTick = GetTickCount();
}
// 尚未稳定：冻结当前帧，继续等待
if (GetTickCount() - m_SizeChangeTick < RESIZE_DEBOUNCE_MS)
return;
// 稳定 300ms：查询 DWM 真实帧边界，决定是否重建
RECT frameRc = fullRc;
if (SUCCEEDED(DwmGetWindowAttribute(m_hTargetWnd, DWMWA_EXTENDED_FRAME_BOUNDS, &frameRc, sizeof(frameRc)))) {
m_ShadowLeft = frameRc.left - fullRc.left;
m_ShadowTop = frameRc.top - fullRc.top;
} else {
m_ShadowLeft = m_ShadowTop = 0;
}
if ((ULONG)(frameRc.right - frameRc.left) != m_ulFullWidth ||
(ULONG)(frameRc.bottom - frameRc.top) != m_ulFullHeight) {
Mprintf("CScreenSpy: 窗口尺寸变化 %dx%d -> %dx%d，触发重建\n",
m_ulFullWidth, m_ulFullHeight,
frameRc.right - frameRc.left, frameRc.bottom - frameRc.top);
m_bNeedRestart = true;
return;
}
m_CachedWndW = w;
m_CachedWndH = h;
}
// PrintWindow → 临时 DC → BitBlt 到目标（用缓存的阴影偏移跳过 DWM 扩展帧）
HDC hTmp = m_data.GetWindowDC();
HBITMAP hOld = (HBITMAP)SelectObject(hTmp, m_data.GetWindowBmp());
BOOL ok = PrintWindow(m_hTargetWnd, hTmp, PW_RENDERFULLCONTENT);
if (!ok) ok = PrintWindow(m_hTargetWnd, hTmp, 0);
if (ok) {
BitBlt(hdcDest, 0, 0, ulWidth, ulHeight, hTmp, m_ShadowLeft, m_ShadowTop, SRCCOPY);
}
SelectObject(hTmp, hOld);
return;
}
if (m_bVirtualPaint) {
// 先用深色填充背景，避免窗口移动时留下残影
RECT rcFill = { 0, 0, (LONG)ulWidth, (LONG)ulHeight };