Question

DXVA2_Fixed32 a = DXVA2_Fixed32OpaqueAlpha();

    float f = (float)a;

This is throwing a compilation error

“error C2440: Cannot convert from “DXVA2_Fixed32 ” to Float.

My purpose is to assign “a”‘s value to “f”.

Can anyone kindly let me know How to assign DXVA2_Fixed32 type variable “a” to “a float variable “f”.

Thanks in advance.

Answer 1

You can’t do it with a typecast like that. The DXVA2_Fixed32 type is a struct containing two fields with fractional and integer parts of the number.

You need to call DXVA2FixedToFloat to perform the conversion.

float f = DXVA2FixedToFloat(a);

If ever you need to go in the opposite direction you can use the predictably named DXVA2FloatToFixed.