1，directx9截屏接口

Direct3DCreate9 創建directx3D對象

CreateDevice：創建一個顯卡設備對象

CreateOffscreenPlainSurface：創建離屏表面（一片存儲空間）

GetFrontBufferData：前臺表面

LockRect函數（取表面的內容）

D3DLOCKED_RECT lr;

ZeroMemory(&lr, sizeof(D3DLOCKED_RECT));

pSurface -> LockRect(&lr, NULL, 0)

DEORD* pBuf = (DWORD*)lr . pBits;

pSurface -> UnlockRect();

#include <d3d9.h> #pragma comment(lib,"d3d9.lib") #pragma warning (disable:4996) #include <iostream> using namespace std;//截取全屏 void CaptureScreen(void* data) {//1，創建direct3d對象static IDirect3D9* d3d = NULL;if (!d3d){d3d = Direct3DCreate9(D3D_SDK_VERSION);}if (!d3d)return;//2，創建顯卡的設備對對象static IDirect3DDevice9* device = NULL;if (!device){D3DPRESENT_PARAMETERS pa;ZeroMemory(&pa, sizeof(pa));pa.Windowed = true;pa.Flags = D3DPRESENTFLAG_LOCKABLE_BACKBUFFER;pa.SwapEffect = D3DSWAPEFFECT_DISCARD;pa.hDeviceWindow = GetDesktopWindow();d3d->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, 0,D3DCREATE_HARDWARE_VERTEXPROCESSING, &pa, &device);}if (!device)return;//3，創建離屏表面//獲取屏幕的寬度和高度int w = GetSystemMetrics(SM_CXSCREEN);int h = GetSystemMetrics(SM_CYSCREEN);static IDirect3DSurface9* sur = NULL;if (!sur){device->CreateOffscreenPlainSurface(w, h,D3DFMT_A8B8G8R8, //對應的像素格式D3DPOOL_SCRATCH, //存儲位置&sur, 0); //參數保存在sur}if (!sur)return;//抓屏 取顯卡當前顯示的畫面device->GetFrontBufferData(0, sur);//取出數據D3DLOCKED_RECT rect;ZeroMemory(&rect, sizeof(rect));if (sur->LockRect(&rect, 0, 0) != S_OK){return;}memcpy(data, rect.pBits, w * h * 4);sur->UnlockRect();//解鎖 }int main() { char* buf = new char[1920 * 1080 * 4];FILE* fp = fopen("./file/out.reb", "wb");int size = 1920 * 1080 * 4;for (int i = 0; i < 100; i++){CaptureScreen(buf);fwrite(buf, 1, size, fp);Sleep(100);}return 0; }

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