可靠的屏幕截图方法 - 在Windows 10中提供透明区域

时间:2015-11-30 20:02:59

标签: c++ winapi

我使用这种可靠的方法来截取屏幕截图。我称之为可靠,因为从XP开始,它适用于所有版本的Windows。但是在Win10中,它现在给了我透明的部分。某些类型的窗户中的某些区域只是透明的,我无法解释。

这是一个屏幕截图,键盘上有正常的打印屏幕键 -

screenshot

这是使用我的代码 -

的同一部分的屏幕截图

screenshot

似乎是文件类型的窗口"文件资源管理器"某些领域变得透明。上面的截图是Notepad ++。

这是我的算法:

#include <Windows.h>
#include <stdio.h>

int WINAPI WinMain(HINSTANCE hinst, HINSTANCE, LPSTR, int)
{
    MessageBox(0, L"Hello World", L"Unipen", MB_ICONINFORMATION);


    int i = 0;
    DISPLAY_DEVICE device;

    device.cb = sizeof(device);


    while (EnumDisplayDevices(NULL, i, &device, 0) && ++i) {
        if ((device.StateFlags & DISPLAY_DEVICE_ACTIVE) != DISPLAY_DEVICE_ACTIVE) {
            MessageBox(0, device.DeviceName, L"CONTINUE", MB_ICONINFORMATION);
            continue;
        }
        MessageBox(0, device.DeviceName, L"BREAK", MB_ICONINFORMATION);
        break;
    }

    size_t screenWidth = 1920;
    size_t screenHeight = 1200;
    size_t colorLen = 4;

    HDC hdcScreen;
    hdcScreen = CreateDC(NULL, device.DeviceName, NULL, NULL);
    if (hdcScreen == (HDC)NULL) {
        MessageBox(0, L"UnableToCreateDC", L"ERROR", MB_ICONINFORMATION);
        return 0;
    }

    HDC hdcMemoryDC;
    hdcMemoryDC = CreateCompatibleDC(hdcScreen);
    if (hdcMemoryDC == (HDC)NULL) {
        DeleteDC(hdcScreen);
        MessageBox(0, L"UnableToCreateCompatibleDC", L"ERROR", MB_ICONINFORMATION);
        return 0;
    }

    BITMAPINFO bmi;
    bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    bmi.bmiHeader.biWidth = (LONG)screenWidth;
    bmi.bmiHeader.biHeight = (-1)*(LONG)screenHeight;
    bmi.bmiHeader.biPlanes = 1;
    bmi.bmiHeader.biBitCount = 32;
    bmi.bmiHeader.biCompression = BI_RGB;

    BYTE *pixelBuffer;
    HBITMAP hbmp;
    hbmp = CreateDIBSection(hdcScreen, &bmi, DIB_RGB_COLORS, (void **)&pixelBuffer, NULL, 0);
    if (hbmp == (HBITMAP)NULL) {
        DeleteDC(hdcScreen);
        DeleteDC(hdcMemoryDC);
        MessageBox(0, L"UnableToCreateDIBSection", L"ERROR", MB_ICONINFORMATION);
        return 0;
    }

    //HGDIOBJ rez_selected;
    HBITMAP rez_selected_bmp;
    rez_selected_bmp = (HBITMAP)SelectObject(hdcMemoryDC, hbmp);
    if (rez_selected_bmp == (HBITMAP)NULL) {
        DeleteDC(hdcScreen);
        DeleteDC(hdcMemoryDC);
        DeleteObject(hbmp);
        MessageBox(0, L"UnableToCreateDIBSection", L"ERROR", MB_ICONINFORMATION);
        return 0;
    }

    BitBlt(hdcMemoryDC, 0, 0, screenWidth, screenHeight, hdcScreen, 0, 0, SRCCOPY);


    //(void) SelectObject(hdcMemoryDC, rez_selected_bmp);

    if (fopen_s(&stream, "C:\\Users\Vayeate\\Desktop\\blah.txt", "w") == 0) {
        for(size_t px = 0 ; px < (screenHeight * screenWidth * 4) ; ++px) {
            fprintf(stream, "%hhu, ", pixelBuffer[px]);
        }
        fclose(stream);
    }

    DeleteDC(hdcScreen);
    DeleteDC(hdcMemoryDC);
    DeleteObject(hbmp);

    MessageBox(0, L"DONE", L"Unipen", MB_ICONINFORMATION);

    return 0;
}

0 个答案:

没有答案