D3DMTEXTUREFILTERTYPE (Windows Embedded CE 6.0)

1/6/2010

This enumeration provides values for the texture stage states used for texture filtering and for mipmaps. The applicable texture stage states are D3DMTSS_MAGFILTER, D3DMTSS_MINFILTER, and D3DMTSS_MIPFILTER (see D3DMTEXTURESTAGESTATETYPE).

Syntax

typedef enum _D3DMTEXTUREFILTERTYPE {
  D3DMTEXF_NONE        = 0,
  D3DMTEXF_POINT       = 1,
  D3DMTEXF_LINEAR      = 2,
  D3DMTEXF_ANISOTROPIC = 3,
  D3DMTEXF_FORCE_ULONG = 0x7fffffff,
} D3DMTEXTUREFILTERTYPE;

Elements

• D3DMTEXF_NONE
  Identifies that filtering is disabled. This value is only valid for D3DMTSS_MIPFILTER.

• D3DMTEXF_POINT
  Identifies that the color value at the nearest texel corresponding to the texture coordinate is used.

• D3DMTEXF_LINEAR
  Identifies that the nearest texel — plus the texels immediately above, below, left, and right of the nearest texel — are used in a weighted average.

• D3DMTEXF_ANISOTROPIC
  Identifies that anisotropic filtering is used. Anisotropic filtering is a variant of linear filtering that compensates for the orientation of the primitive verses the orientation of screen space. Anisotropic filtering uses a constant, which is the maximum allowed anisotropy. This unsigned integer constant is set on a per stage basis by the texture stage state D3DMTSS_MAXANISOTROPY. The value of 1 causes all computations to be disabled and the results are identical to linear filtering.

• D3DMTEXF_FORCE_ULONG
  Forces the compiler to interpret the enumeration as a ULONG value. This value is not used directly in Direct3D Mobile programming.

Remarks

Set a texture stage's magnification filter by calling the IDirect3DMobileDevice::SetTextureStageState method with the D3DMTSS_MAGFILTER value as the second parameter and one member of this enumeration as the third parameter.

Set a texture stage's minification filter by calling IDirect3DMobileDevice::SetTextureStageState with the D3DMTSS_MINFILTER value as the second parameter and one member of this enumeration as the third parameter.

Set the texture filter to use between mipmap levels by calling IDirect3DMobileDevice::SetTextureStageState with the D3DMTSS_MIPFILTER value as the second parameter and one member of this enumeration as the third parameter.

Requirements

See Also

Reference

Direct3D Mobile Enumerations
D3DMTEXTURESTAGESTATETYPE
IDirect3DMobileDevice::SetTextureStageState