D3DXCreateTextureFromFileInMemoryEx

Creates a texture from a file in memory. This is a more advanced function than D3DXCreateTextureFromFileInMemory.

HRESULT D3DXCreateTextureFromFileInMemoryEx(
  LPDIRECT3DDEVICE9 pDevice,
  LPCVOID pSrcData,
  UINT SrcDataSize,
  UINT Width,
  UINT Height,
  UINT MipLevels,
  DWORD Usage,
  D3DFORMAT Format,
  D3DPOOL Pool,
  DWORD Filter,
  DWORD MipFilter,
  D3DCOLOR ColorKey,
  D3DXIMAGE_INFO * pSrcInfo,
  PALETTEENTRY * pPalette,
  LPDIRECT3DTEXTURE9 * ppTexture
);

Parameters

pDevice

[in] Pointer to an IDirect3DDevice9 interface, representing the device to be associated with the texture.

pSrcData

[in] Pointer to the file in memory from which to create the texture.

SrcDataSize

[in] Size of the file in memory, in bytes.

Width

[in] Width in pixels. If this value is zero or D3DX_DEFAULT, the dimensions are taken from the file.

Height

[in] Height, in pixels. If this value is zero or D3DX_DEFAULT, the dimensions are taken from the file.

MipLevels

[in] Number of mip levels requested. If this value is zero or D3DX_DEFAULT, a complete mipmap chain is created.

Usage

[in] 0, D3DUSAGE_RENDERTARGET, or D3DUSAGE_DYNAMIC. Setting this flag to D3DUSAGE_RENDERTARGET indicates that the surface is to be used as a render target. The resource can then be passed to the pNewRenderTarget parameter of the IDirect3DDevice9::SetRenderTarget method. If either D3DUSAGE_RENDERTARGET or D3DUSAGE_DYNAMIC is specified, Pool must be set to D3DPOOL_DEFAULT, and the application should check that the device supports this operation by calling IDirect3D9::CheckDeviceFormat. For more information about using dynamic textures, see Using Dynamic Textures.

Format

[in] Member of the D3DFORMAT enumerated type, describing the requested pixel format for the texture. The returned texture might have a different format from that specified by Format. Applications should check the format of the returned texture. If D3DFMT_UNKNOWN, the format is taken from the file. If D3DFMT_FROM_FILE, the format is taken exactly as it is in the file, and the call will fail if this violates device capabilities.

Pool

[in] Member of the D3DPOOL enumerated type, describing the memory class into which the texture should be placed.

Filter

[in] Combination of one or more flags controlling how the image is filtered. Specifying D3DX_DEFAULT for this parameter is the equivalent of specifying D3DX_FILTER_TRIANGLE | D3DX_FILTER_DITHER. Each valid filter must contain one of the flags in D3DX_FILTER.

MipFilter

[in] Combination of one or more flags controlling how the image is filtered. Specifying D3DX_DEFAULT for this parameter is the equivalent of specifying D3DX_FILTER_BOX. Each valid filter must contain one of the flags in D3DX_FILTER. In addition, use bits 27-31 to specify the number of mip levels to be skipped (from the top of the mipmap chain) when a .dds texture is loaded into memory; this allows you to skip up to 32 levels.

ColorKey

[in] D3DCOLOR value to replace with transparent black, or 0 to disable the colorkey. This is always a 32-bit ARGB color, independent of the source image format. Alpha is significant and should usually be set to FF for opaque color keys. Thus, for opaque black, the value would be equal to 0xFF000000.

pSrcInfo

[in, out] Pointer to a D3DXIMAGE_INFO structure to be filled with a description of the data in the source image file, or NULL.

pPalette

[out] Pointer to a PALETTEENTRY structure, representing a 256-color palette to fill in, or NULL. See Remarks.

ppTexture

[out] Address of a pointer to an IDirect3DTexture9 interface, representing the created texture object.

Return Values

If the function succeeds, the return value is D3D_OK. If the function fails, the return value can be one of the following: D3DERR_NOTAVAILABLE, D3DERR_OUTOFVIDEOMEMORY, D3DERR_INVALIDCALL, D3DXERR_INVALIDDATA, E_OUTOFMEMORY.

Remarks

This function supports the following file formats: .bmp, .dds, .dib, .hdr, .jpg, .pfm, .png, .ppm, and .tga. See D3DXIMAGE_FILEFORMAT.

For details about PALETTEENTRY, see the Platform SDK. Note that as of DirectX 8.0, the peFlags member of the PALETTEENTRY structure does not function as documented in the Platform SDK. The peFlags member is now the alpha channel for 8-bit palletized formats.

When skipping mipmap levels while loading a .dds file, use the D3DX_SKIP_DDS_MIP_LEVELS macro to generate the MipFilter value. This macro takes the number of levels to skip and the filter type and returns the filter value, which would then be passed into the MipFilter parameter.

Requirements

Header: Declared in D3dx9tex.h.

See Also

D3DXCreateTextureFromFileInMemory, Texturing Functions