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Specifies the format of the data to be read by the texture reference hTexRef.fmtandNumPackedComponentsare exactly analogous to the Format and NumChannels members of the CUDA_ARRAY_DESCRIPTOR structure: They specify the format of each component and the number of components per array element. 
 Parameters:
  
    |  | hTexRef | - Texture reference |  |  | fmt | - Format to set |  |  | NumPackedComponents | - Number of components per array element | 
 Returns:CUDA_SUCCESS, CUDA_ERROR_DEINITIALIZED, CUDA_ERROR_NOT_INITIALIZED, CUDA_ERROR_INVALID_CONTEXT, CUDA_ERROR_INVALID_VALUE
 See also:cuTexRefSetAddress, cuTexRefSetAddress2D, cuTexRefSetAddressMode, cuTexRefSetArray, cuTexRefSetFilterMode, cuTexRefSetFlags, cuTexRefGetAddress, cuTexRefGetAddressMode, cuTexRefGetArray, cuTexRefGetFilterMode, cuTexRefGetFlags, cuTexRefGetFormat 
 
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