Method declareVarStr

src/OpenColorIO/GpuShaderUtils.cpp:450–480

// support the in-place declarations (like res = t + vec3(...) for example).

std::string GpuShaderText::declareVarStr(const std::string & name, float v)
{
    if (name.empty())
    {
        throw Exception("GPU variable name is empty.");
    }

    // Note that OSL does not support inf and -inf so the code below adjusts the value to float max.

    if (std::isinf(v))
    {
        float newVal = v;

        if (std::signbit(v))
        {
            newVal = -1 * std::numeric_limits<float>::max();
        }
        else
        {
            newVal = std::numeric_limits<float>::max();
        }

        std::ostringstream oss;
        oss.precision(std::numeric_limits<float>::max_digits10);
        oss << newVal;

        return floatDecl(name) + " = " + oss.str();
    }

    return floatDecl(name) + " = " + getFloatString(v, m_lang);
}

std::string GpuShaderText::vectorCompareExpression(const std::string& lhs, const std::string& op, const std::string& rhs)
{