问一个D3DSurface8的copyrects问题，有了解过的进来帮忙～谢～

rojer

我用了一个D3DSurface8来copy到BackSuface，但不能显示，郁闷中，了解过的朋友指点一二，谢谢先～
下边是拷贝部分代码。

......
......
        g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,0,255), 1.0f, 0 );

        // Begin the scene
        g_pd3dDevice->BeginScene();

        LPDIRECT3DSURFACE8 pBackBuffer;
        //;
        if(FAILED(g_pd3dDevice->GetBackBuffer(0, D3DBACKBUFFER_TYPE_MONO, &pBackBuffer)))
        {
                MessageBox(NULL, "fadfasdf", "", MB_OK);
        }

        RECT        rtTemp = { 0, 0, 200, 200};
        POINT        ptDst = { 0, 0};

        g_pd3dDevice->CopyRects(g_pSurface, &rtTemp, 1, pBackBuffer, &ptDst);
        pBackBuffer->Release();

        // End the scene
        g_pd3dDevice->EndScene();
        // Present the backbuffer contents to the display
        g_pd3dDevice-&gtresent( NULL, NULL, NULL, NULL );
.....
.....

其中，suface是正常的

shaoxiaoning

关注中

kevinlynx

  Yeah~~I have got the same error~ And the error code thar CopyRests return is D3DERR_INVALIDCALL. I have checked all of the parameters , I am a beginner of the D3D8~Pay attention too~~
  Who can help us?

kevinlynx

  Yes,I have got the correct the answer and the reson why it did not work correctly.

I will talk about how I do it. (Maybe it is not suit for your program), I got the error code --
D3DERR_INVALIDCALL.So there must be some parameters that I have passed to the method CopyRects were not correct. And finally ,yeah ,I have created a window that 640*480,but in face the client area is 635*449 .(Maybe  your window program is not the size). And the RECT that passed to the CopyRescts is 640*480,and CopyRects method does not support stretch, color key, alpha blend, format conversion, or clipping of either source or destination rectangles.
  So ,the parameter RECT is not available-----That is why I made the miatake.
  I hope this infomation  can help you .