在winapi gui应用程序中显示实时视图图像的edsdk c++代码

#include <windows.h>
#include <EDSDK.h>

// 全局变量
HWND hWnd;
HDC hdc;
EDSDK::CameraRef camera;

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) {
    // 注册窗口类
    WNDCLASSEX wcex;
    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc = WndProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = hInstance;
    wcex.hIcon = LoadIcon(hInstance, IDI_APPLICATION);
    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wcex.lpszMenuName = NULL;
    wcex.lpszClassName = TEXT("EDSDKRealTimeView");
    wcex.hIconSm = LoadIcon(wcex.hInstance, IDI_APPLICATION);

    RegisterClassEx(&wcex);

    // 创建窗口
    hWnd = CreateWindow(TEXT("EDSDKRealTimeView"), TEXT("EDSDK Real-Time View"), WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, NULL, NULL, hInstance, NULL);

    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

    // 初始化EDSDK并连接相机
    EDSDK::EdsInitializeSDK();
    EDSDK::CameraListRef cameraList;
    EDSDK::EdsGetCameraList(&cameraList);
    if (EDSDK::EdsGetChildCount(cameraList) > 0) {
        EDSDK::EdsGetChildAtIndex(cameraList, 0, &camera);
        EDSDK::EdsOpenSession(camera);
        EDSDK::EdsSetPropertyEventHandler(camera, kEdsPropertyEvent_All, PropertyEvent, NULL);
    }

    // 消息循环
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    // 清理
    EDSDK::EdsCloseSession(camera);
    EDSDK::EdsRelease(camera);
    EDSDK::EdsRelease(cameraList);
    EDSDK::EdsTerminateSDK();

    return (int)msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) {
    switch (message) {
    case WM_PAINT: {
        PAINTSTRUCT ps;
        hdc = BeginPaint(hWnd, &ps);

        // 获取并显示实时图像
        EDSDK::EdsImageRef image;
        if (EDSDK::EdsDownloadEvfImage(camera, &image)) {
            // 将图像绘制到窗口
            // 这里需要实现将EDSDK图像转换为HBITMAP并绘制的逻辑
            // ...

            EDSDK::EdsRelease(image);
        }

        EndPaint(hWnd, &ps);
        break;
    }
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }
    return 0;
}

// 属性事件处理函数
void PropertyEvent(EDSDK::CameraRef camera, EDSDK::EdsUInt32 inEvent, EDSDK::EdsUInt32 inPropertyID, void* inContext) {
    if (inPropertyID == kEdsPropID_Evf_OutputDevice) {
        // 处理实时视图输出设备变化
    }
}