使用Direct3D 9進行2D編程9 - 測試圖像失真

我試圖用DirectX 9構建使用2D精靈的簡單2D遊戲，並且出現了乾淨地顯示圖像的問題。我想加載bmp圖像並將它們按原樣顯示在屏幕上（無插值，無放大，無濾波或抗鋸齒等）。使用Direct3D 9進行2D編程9 - 測試圖像失真

我確定我錯過了一些東西，但是當我嘗試在屏幕上呈現一個100x100的bmp時，它看起來不穩定和扭曲，就像像素藝術圖像在稍微縮小時通常會看起來一樣。我希望bmp看起來與在MS Paint中加載時完全一樣。

有沒有人有任何想法，爲什麼這可能是這種情況？我的代碼如下所示：

初始化代碼：

g_DxCom = Direct3DCreate9(D3D_SDK_VERSION); 
if (g_DxCom == NULL) 
{ 
    return false; 
} 

D3DDISPLAYMODE d3dDisplayMode; 

if (FAILED(g_DxCom->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &d3dDisplayMode))) 
{ 
    return false; 
} 

D3DPRESENT_PARAMETERS d3dPresentParameters; 
::ZeroMemory(&d3dPresentParameters, sizeof(D3DPRESENT_PARAMETERS)); 
d3dPresentParameters.Windowed = FALSE; 
d3dPresentParameters.SwapEffect = D3DSWAPEFFECT_DISCARD; 
d3dPresentParameters.BackBufferFormat = d3dDisplayMode.Format; // D3DFMT_X8R8G8B8 
d3dPresentParameters.BackBufferWidth = d3dDisplayMode.Width; 
d3dPresentParameters.BackBufferHeight = d3dDisplayMode.Height; 
d3dPresentParameters.PresentationInterval = D3DPRESENT_INTERVAL_ONE; 

if (FAILED(g_DxCom->CreateDevice(D3DADAPTER_DEFAULT, 
            D3DDEVTYPE_HAL, 
            this->hWnd, 
            D3DCREATE_HARDWARE_VERTEXPROCESSING, 
            &d3dPresentParameters, 
            &pd3dDevice))) 
{ 
    if (FAILED(g_DxCom->CreateDevice(D3DADAPTER_DEFAULT, 
             D3DDEVTYPE_HAL, 
             this->hWnd, 
             D3DCREATE_SOFTWARE_VERTEXPROCESSING, 
             &d3dPresentParameters, 
             &pd3dDevice))) 
    { 
     return false; 
    } 
} 

texture = NULL; 
bg_texture = NULL;

渲染代碼：

LPDIRECT3DDEVICE9 g_dxDevice; 

float float1 = 99.5f; // I'd like to render my 100x100 sprite from screen coordinates 100, 100 to 200, 200 
float float2 = 198.5f; 

CUSTOMVERTEX OurVertices[] = 
{ 
    { float1, float2, 1.0f, 1.0f, 0.0f, 1.0f }, 
    { float1, float1, 1.0f, 1.0f, 0.0f, 0.0f }, 
    { float2, float1, 1.0f, 1.0f, 1.0f, 0.0f }, 
    { float1, float2, 1.0f, 1.0f, 0.0f, 1.0f }, 
    { float2, float1, 1.0f, 1.0f, 1.0f, 0.0f }, 
    { float2, float2, 1.0f, 1.0f, 1.0f, 1.0f } 
}; 

LPDIRECT3DVERTEXBUFFER9 v_buffer; 

g_dxDevice->CreateVertexBuffer(6 * sizeof(CUSTOMVERTEX), 
           0, 
           CUSTOMFVF, 
           D3DPOOL_MANAGED, 
           &v_buffer, 
           NULL); 

VOID* pVoid; 

// Lock the vertex buffer into memory 
v_buffer->Lock(0, 0, &pVoid, 0); 

// Copy our vertex buffer to memory 
::memcpy(pVoid, OurVertices, sizeof(OurVertices)); 

// Unlock buffer 
v_buffer->Unlock(); 

LPDIRECT3DTEXTURE9 g_texture; 
HRESULT hError; 

DWORD dwTextureFilter = D3DTEXF_NONE; 

g_dxDevice->SetSamplerState(0, D3DSAMP_MINFILTER, dwTextureFilter); 
g_dxDevice->SetSamplerState(0, D3DSAMP_MAGFILTER, dwTextureFilter); 
g_dxDevice->SetSamplerState(0, D3DSAMP_MIPFILTER, dwTextureFilter); 

g_dxDevice->SetTextureStageState(0,D3DTSS_COLOROP,D3DTOP_SELECTARG1); 
g_dxDevice->SetTextureStageState(0,D3DTSS_COLORARG1,D3DTA_TEXTURE); 
g_dxDevice->SetTextureStageState(0,D3DTSS_COLORARG2,D3DTA_DIFFUSE); 

hError = D3DXCreateTextureFromFile(g_dxDevice, L"Test.bmp", &g_texture); // 100x100 sprite 

g_dxDevice->SetTexture(0, g_texture); 

g_dxDevice->Clear(0, 
        NULL, 
        D3DCLEAR_TARGET, 
        D3DCOLOR_XRGB(0, 40, 100), 
        1.0f, 
        0); 

g_dxDevice->BeginScene(); 

// Do rendering on the back buffer here 
g_dxDevice->SetFVF(CUSTOMFVF); 
g_dxDevice->SetStreamSource(0, v_buffer, 0, sizeof(CUSTOMVERTEX)); 
g_dxDevice->DrawPrimitive(D3DPT_TRIANGLELIST, 0, 6); 

g_dxDevice->EndScene(); 

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

g_texture->Release(); 
v_buffer->Release();

來源

2013-03-04 8bitcartridge

好了，我終於想通了，我應該知道這是事實。它看起來像DirectX9只適用於大小是2的倍數的紋理。如果我更改紋理，以便精靈正方形是128 x 128（只是添加一些透明度），並運行與float2適當地更改的應用程序，沒有失真在渲染的圖像中。

華友世界...

來源

2013-03-04 06:48:44 8bitcartridge

使用Direct3D 9進行2D編程9 - 測試圖像失真

回答

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