使用DirectX进行桌面捕获无法正常工作 [英] The desktop capture with DirectX does not work
本文介绍了使用DirectX进行桌面捕获无法正常工作的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
由于D3DPOOL_SCRATCH处理缓慢,因此我编写了桌面捕获程序以供Internet上的报告参考。但是,结果是黑色的画面。这是控制台程序的结果还是其他原因?
Because processing was slow by D3DPOOL_SCRATCH, I wrote the desktop capture program to reference for the report on the Internet. However, a result is a pitch-black picture. Is this the result of a console program or is there any other cause?
#include <stdio.h>
#include <Windows.h>
#include <d3d9.h>
void main()
{
CoInitialize(NULL);
LPDIRECT3D9 d3d9;
LPDIRECT3DDEVICE9 d3ddev;
d3d9 = Direct3DCreate9(D3D_SDK_VERSION);
int ww = GetSystemMetrics(SM_CXSCREEN);
int wh = GetSystemMetrics(SM_CYSCREEN);
HWND hwnd = GetDesktopWindow();
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory(&d3dpp, sizeof(d3dpp));
d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;
d3dpp.BackBufferCount = 1;
d3dpp.BackBufferWidth = ww;
d3dpp.BackBufferHeight = wh;
d3dpp.MultiSampleType = D3DMULTISAMPLE_NONE;
d3dpp.MultiSampleQuality = 0;
d3dpp.EnableAutoDepthStencil = TRUE;
d3dpp.AutoDepthStencilFormat = D3DFMT_D16;
d3dpp.hDeviceWindow = hwnd;
d3dpp.Flags = D3DPRESENTFLAG_LOCKABLE_BACKBUFFER;
d3dpp.FullScreen_RefreshRateInHz = D3DPRESENT_RATE_DEFAULT;
d3dpp.PresentationInterval = D3DPRESENT_INTERVAL_DEFAULT;
d3d9->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hwnd, D3DCREATE_HARDWARE_VERTEXPROCESSING, &d3dpp, &d3ddev);
IDirect3DSurface9* render;
IDirect3DSurface9* dest;
d3ddev->CreateOffscreenPlainSurface(ww, wh, D3DFMT_A8R8G8B8, D3DPOOL_SYSTEMMEM, &dest, NULL);
d3ddev->GetRenderTarget(0, &render);
d3ddev->GetRenderTargetData(render, dest);
D3DLOCKED_RECT bits;
dest->LockRect(&bits, NULL, D3DLOCK_READONLY);
// If a capture is successful, colors other than black(0x00000000) should enter.
for(int i = 0; i < 100; i++){
printf("%02X ", *((BYTE*)bits.pBits + i));
}
dest->UnlockRect();
render->Release();
dest->Release();
d3ddev->Release();
d3d9->Release();
CoUninitialize();
}
推荐答案
这与应用程序类型,如果要获取桌面图像的数据,则应使用以下功能
This is nothing related to the application type, if you want to get the data of desktop image, you should use the following function
因此,
d3ddev->GetRenderTarget(0, &render);
d3ddev->GetRenderTargetData(render, dest);
您应该致电
d3ddev->GetFrontBufferData(0, dest);
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