Question

I am trying to implement three functions and have a lot of errors all of which have the same signature:

error C2782: 'T0 ColorBurn(T0,T0)' : template parameter 'T0' is ambiguous
error C2782: 'T1 ColorDodge(T1,T1)' : template parameter 'T1' is ambiguous

Where I have make a mistake?
This is my code:

template <class T0>
T0 ColorBurn(T0 base, T0 blend)
{
    return (blend == 0.0) ? blend : std::max((1.0 - ((1.0 - base) / blend)), 0.0);
}
template <class T1>
T1 ColorDodge(T1 base, T1 blend)
{
    return (blend == 1.0) ? blend : std::min(base / (1.0 - blend), 1.0);
}
template <class T>
T BlendVividLightf(T base, T blend)
{
    return (blend < 0.5) ? ColorBurn(base, (2.0 * blend)) : ColorDodge(base, (2.0 * (blend - 0.5)));
}

the sample of calling BlendVividLightf:

static pixel_t blend_vivid_light(pixel_t _p1, pixel_t _p2)
{
    pixel_t po;
    po.r = BlendVividLightf(_p1.r, _p2.r);
....
}
 pixel_t - is my struct for rgb values:
typedef struct  
{
    float r;
    float g;
    float b;
} pixel_t;

Answer 1

I can guess, that the problem is due to mismatch of float and double. You are making (forcing) both template arguments of same type T0/T1/T in all the 3 functions. So when you call the function using float it will have problem. See the demo here.

This can be solved by making your pixel_t members as double instead of float.