Directx9表面纹理

Directx9 surface to texture

本文关键字：纹理 表面 Directx9      更新时间：2023-10-16

我想捕获我的Backbuffer到我的LPDIRECT3DSURFACE9，然后将表面复制到我的IDirect3DTexture9，最后使用该纹理作为我的对象皮肤。我写了代码，但只收到黑色像素。

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);
}

你可以试试这样

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();

其中IdStage是当前要复制的渲染目标，在你的情况下，它将是0

m_Texture是一个DirectX纹理，你想从backbuffer接收副本

One Another way:

步骤1: 获取返回缓冲区作为表面:

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

步骤2:创建一个空的纹理

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

注意:如果你想要alpha通道，那么使用D3DFMT_A8R8G8B8格式。

步骤3:获取指向空纹理顶部表面的指针

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

第4步:表面到表面复制(缓冲区表面到空表面)

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

步骤5:合成纹理与后缓冲内容

textureMap
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