Windows 10版本1703(15063.138)上的bitblt失败 [英] bitblt failed on Windows 10 version 1703 (15063.138)

问题描述

使用Visual Studio 2017，vc141，以下代码应从游戏前窗口获取屏幕截图，但现在它返回黑白图像.

using Visual Studio 2017, vc141, the following code should got a screenshot from front game window but now it return a black and blank image.

游戏的唯一问题(尝试过OpenGL和Vulkan，ogl返回黑色，vulkan返回白色)

only issue with games(tried OpenGL and Vulkan, ogl return black, vulkan return white)

在升级到Windows 10 1703之前，它可以在Windows 10 1607和Windows 7 sp1上工作

before upgrade to windows 10 1703, it works on windows 10 1607 and windows 7 sp1

#include <opencv2/core/core.hpp>
#include <opencv2/imgproc/imgproc.hpp>
#include <opencv2/highgui/highgui.hpp>

代码:

BOOL ScreenShot(cv::Mat *img, HWND hWnd = NULL) {
    HBITMAP hBitmap;
    HDC hdcSys = GetDC(hWnd);
    HDC hdcMem = CreateCompatibleDC(hdcSys);

    void *ptrBitmapPixels;
    BITMAPINFO bi;
    HDC hdc;

    RECT rect;

    if (!GetWindowRect(hWnd, &rect) || (hWnd == NULL)) {
        return FALSE;
    }

    ZeroMemory(&bi, sizeof(BITMAPINFO));

    LONG lWidth = rect.right - rect.left;
    LONG lHeight = rect.bottom - rect.top;

    bi.bmiHeader.biSize = sizeof(BITMAPINFO);
    bi.bmiHeader.biWidth = lWidth;
    bi.bmiHeader.biHeight = -lHeight;
    bi.bmiHeader.biPlanes = 1;
    bi.bmiHeader.biBitCount = 32;

    hdc = GetDC(hWnd);
    hBitmap = CreateDIBSection(hdc, &bi, DIB_RGB_COLORS, &ptrBitmapPixels, NULL, 0);

    SelectObject(hdcMem, hBitmap);

    *img = cv::Mat(lHeight, lWidth, CV_8UC4, ptrBitmapPixels, 0);

    BitBlt(hdcMem, 0, 0, lWidth, lHeight, hdcSys, 0, 0, SRCCOPY);

    //DeleteObject(hBitmap);
    DeleteDC(hdcMem);
    ReleaseDC(hWnd, hdcSys);
    ReleaseDC(hWnd, hdc);

    return TRUE;
}

BOOL InitInstance(HINSTANCE hInstance, int nCmdShow)
{
    /*...*/
    HotKeyId = GlobalAddAtom(L"DBKGNDSCREENSHOT");
    RegisterHotKey(hWnd, HotKeyId, NULL, VK_F10);
    /*...*/
}
LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
    /*...*/
    case WM_HOTKEY:
        if (wParam == HotKeyId) {
            cv::Mat t;
            HWND MainHWND;
            MainHWND = GetForegroundWindow();

            ScreenShot(&t, MainHWND);
            cv::imshow("1", t);
        }
        break;
    /*...*/
}

甚至是黑色的PrintWindow(至少我们有一个标题栏)

and still black even PrintWindow(at least we got a titlebar)

PrintWindow(hWnd, hdcMem, 0);
//BitBlt(hdcMem, 0, 0, lWidth, lHeight, hdcSys, 0, 0, SRCCOPY);

我将此程序发送给了我的朋友(不做任何修改，他的OS = win7 x64)，但是他得到了正确的结果.

I send this program to my friend (without any modify, his OS=win7 x64), but he got the correct result.

那我该怎么办?

推荐答案

GDI是一项非常古老的技术，并且已逐渐被弃用.在Windows 10上捕获桌面的更可靠方法是通过桌面复制API .

GDI is a very old technology and is slowly getting deprecated. The more reliable method to capture desktop on Windows 10 would be through Desktop Duplication API.

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