Question

我想将我的Backbuffer捕获到我的LPDIRECT3DSURFACE9中，然后将表面复制到我的IDirect3DTexture9中，最后将该纹理用作我的对象皮肤。我写了代码，但刚收到黑色像素。

IDirect3DTexture9* texture;
LPDIRECT3DSURFACE9 pd3dsBack = NULL;

void init()//init point
{

    D3DXCreateTexture(g_pd3dDevice, 640, 480, D3DUSAGE_DYNAMIC,
        0, D3DFMT_X8R8G8B8, D3DPOOL_DEFAULT, &texture);

}

void render()//render point
{

    g_pd3dDevice->BeginScene();

    g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,
        D3DCOLOR_COLORVALUE(0.0f, 1.0f, 0.0f, 1.0f), 1.0f, 0);

    //my scene (1) 3d objects codes for draw.

    g_pd3dDevice->EndScene();

    //now try to get back-buffer into surface

    g_pd3dDevice->GetBackBuffer(0, 0, D3DBACKBUFFER_TYPE_MONO, &pd3dsBack);


    //i add this Save section to ensure the backbuffer data received complete and work.(it was ok and save complete true picture of Scene(1) ).

    D3DXSaveSurfaceToFileA("BackbufferImage.BMP", D3DXIFF_BMP, pd3dsBack, NULL, NULL);


    //this line put surface into my texture ; if u think this way is false please give me a simple code to fill texture by surface.

    texture->GetSurfaceLevel(0, &pd3dsBack);

    pd3dsBack->Release();//release my surface


                         //scene(2)
    g_pd3dDevice->BeginScene();

    g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,
        D3DCOLOR_COLORVALUE(1.0f, 0.0f, 0.0f, 1.0f), 1.0f, 0);

    //now render my scene(2) and useing the texture object for draw it as skin of my 3d     object
    g_pd3dDevice->SetTexture(0, texture);

    g_pd3dDevice->EndScene();


    g_pd3dDevice->Present(NULL, NULL, NULL, NULL);

}

Answer 1

您可以尝试这样的事情

LPDIRECT3DDEVICE9 l_Device= RenderManager()->GetDirectXDevice();
LPDIRECT3DSURFACE9 l_RenderTarget, l_Surface;

m_Texture->GetSurfaceLevel(0,&l_Surface);
l_Device->GetRenderTarget(IdStage,&l_RenderTarget);
l_Device->StretchRect(l_RenderTarget,NULL, l_Surface,NULL,D3DTEXF_NONE);
l_RenderTarget->Release();

IdStage 是您要复制的当前渲染目标，在您的情况下，它将为0

m_Texture 是您想要从后备缓冲区接收副本的DirectX纹理

Answer 2

另一种方式：

第1步： 将后台缓冲区作为表面获取：

 LPDIRECT3DSURFACE9 pBackBuffer;
 GetBackBuffer(0, D3DBACKBUFFER_TYPE_MONO, &pBackBuffer)

第2步： 创建空纹理

 LPDIRECT3DTEXTURE9 textureMap
 D3DXCreateTexture(device, width, height, D3DX_DEFAULT,  D3DUSAGE_RENDERTARGET, 
                                 D3DFMT_X8R8G8B8, D3DPOOL_DEFAULT,&textureMap);

注意：如果您想要Alpha通道，请使用D3DFMT_A8R8G8B8格式。

第3步： 获取指向空纹理顶面的指针

LPDIRECT3DSURFACE9 pTexSurface;
textureMap->GetSurfaceLevel(0, &pTexSurface);

第4步： 表面到表面复制（后缓冲表面到空表面）

StretchRect(pBBsurface, NULL, pTexSurface, NULL, D3DTEXF_NONE);

第5步： 带有后台缓冲区内容的结果纹理

textureMap

Directx9表面纹理

2 个答案: