所以我注意到我的部分代码在被调用时会泄漏大量内存,我试图找出它泄漏的位置或原因,但我陷入了死胡同。
我已尝试使用 Visual Studio 2017 调试器拍摄快照以找出泄漏发生的位置,但据此没有任何重大泄漏。我也试过 Deleaker,我曾经工作过,它告诉我我泄露了 HDC 和 HBITMAP,但无法告诉我有多少内存。
第一个函数是 GetScreenBmp 可能泄漏的地方,但我不是正确地释放了所有东西吗?我知道我没有删除 hBitmap 但我需要返回它。那是内存泄漏的地方吗?
HBITMAP GetScreenBmp(HDC hdc, int screenPositionX, int screenPositionY, int screenSizeX, int screenSizeY) {
// Get screen dimensions
int nScreenWidth = GetSystemMetrics(SM_CXSCREEN);
int nScreenHeight = GetSystemMetrics(SM_CYSCREEN);
int nMousePositionX = 0, nMousePositionY = 0;
// Create compatible DC, create a compatible bitmap and copy the screen using BitBlt()
HDC hCaptureDC = CreateCompatibleDC(hdc);
HBITMAP hBitmap = CreateCompatibleBitmap(hdc, screenSizeX, screenSizeY);
HGDIOBJ hOld = SelectObject(hCaptureDC, hBitmap);
BOOL bOK = BitBlt(hCaptureDC, 0, 0, screenSizeX, screenSizeY, hdc, screenPositionX, screenPositionY, SRCCOPY | CAPTUREBLT);
SelectObject(hCaptureDC, hOld); // always select the previously selected object once done
DeleteObject(hOld);
DeleteDC(hCaptureDC);
return hBitmap;
第二部分是这段代码,我不完全确定我是否正确删除了所有内容。
HDC hdc = GetDC(0);
HBITMAP hBitmap = GetScreenBmp(hdc, currentSplitInformationArray.screenPositionX, currentSplitInformationArray.screenPositionY, currentSplitInformationArray.screenSizeX, currentSplitInformationArray.screenSizeY);
BITMAPINFO MyBMInfo = { 0 };
MyBMInfo.bmiHeader.biSize = sizeof(MyBMInfo.bmiHeader);
// Get the BITMAPINFO structure from the bitmap
if (0 == GetDIBits(hdc, hBitmap, 0, 0, NULL, &MyBMInfo, DIB_RGB_COLORS)) {
MessageBox(NULL, "Resource not available\nDo you want to try again?", "Account Details", MB_ICONWARNING | MB_CANCELTRYCONTINUE | MB_DEFBUTTON2);
}
// create the bitmap buffer
BYTE* lpPixels = new BYTE[MyBMInfo.bmiHeader.biSizeImage];
// Better do this here - the original bitmap might have BI_BITFILEDS, which makes it
// necessary to read the color table - you might not want this.
MyBMInfo.bmiHeader.biCompression = BI_RGB;
MyBMInfo.bmiHeader.biHeight = currentSplitInformationArray.screenSizeY * -1;
// get the actual bitmap buffer
if (0 == GetDIBits(hdc, hBitmap, 0, currentSplitInformationArray.screenSizeY, (LPVOID)lpPixels, &MyBMInfo, DIB_RGB_COLORS)) {
MessageBox(NULL, "Resource not available\nDo you want to try again?", "Account Details", MB_ICONWARNING | MB_CANCELTRYCONTINUE | MB_DEFBUTTON2);
}
::SendMessage(testingComparison, STM_SETIMAGE,
(WPARAM)IMAGE_BITMAP, (LPARAM)hBitmap);
DeleteObject(&MyBMInfo);
DeleteObject(hBitmap);
ReleaseDC(NULL, hdc);
delete[] lpPixels;
如果这是之前已经回答过的问题,或者答案很容易被搜索到,我很抱歉,但我已经尝试了几个小时来修复它。