D3DXCreateTextureFromFileInMemory() 使用總結

D3DXCreateTextureFromFileInMemory

從記憶體資料中建立一張d3d紋理

HRESULT D3DXCreateTextureFromFileInMemory(  LPDIRECT3DDEVICE9 pDevice,  LPCVOID pSrcData,  UINT SrcDataSize,  LPDIRECT3DTEXTURE9 * ppTexture);

Parameters 參數

pDevice

[in]  IDirect3DDevice9 d3d9裝置指標。

pSrcData

[in] 指向記憶體資料的首地址.

SrcDataSize

[in] 要拷貝的大小(byte).

ppTexture

[out] IDirect3DTexture9類型的輸出紋理指標.

 細節注意：

該函數只支援 .bmp, .dds, .dib, .hdr, .jpg, .pfm, .png, .ppm, and .tga. 這幾種格式的記憶體資料，一定要保持正確的格式，否則該函數不知道如何建立 從而失敗；

HBITMAP或則BITMAP都必須轉化成正確的.bmp格式，方能正常建立；

 

D3DXCreateTextureFromFileEx()使用總結

D3DXCreateTextureFromFileEx()能夠更加精確地建立紋理，特別是指定紋理的KeyColor從而建立一張具有鏤空半透明的紋理，

HRESULT D3DXCreateTextureFromFileInMemoryEx(
  LPDIRECT3DDEVICE9 pDevice,                                          // d3d裝置指標
  LPCVOID pSrcData,                                                              // 圖形源記憶體位址
  UINT SrcDataSize,                                                                // 圖形大小
  UINT Width,                                                                            //  紋理大小
  UINT Height,                                                                           // 紋理高
  UINT MipLevels,                                                                     // mipMap級數
  DWORD Usage,                                                                     // 可以是0，D3DUSAGE_RENDERTARGET，和                                                                                                      D3DUSAGE_DYNAMIC
  D3DFORMAT Format,                                                          
  D3DPOOL Pool,                                                                      // 記憶體池( D3DPOOL_MANAGED)
  DWORD Filter,                                                                         // 過濾器( 一般D3DX_DEFAULT)
  DWORD MipFilter,                                                                  // mip過濾器（一般D3DX_DEFUALT）
  D3DCOLOR ColorKey,                                                          // 關鍵色
  D3DXIMAGE_INFO * pSrcInfo,                                             // 映像資訊，可傳入 傳出
  PALETTEENTRY * pPalette,                                                 // 調色盤資訊
  LPDIRECT3DTEXTURE9 * ppTexture
);