GetDPIScale()

float Spices::ImGuiH::GetDPIScale ( )

staticprivate

Get GLFW DPI Scale.

Returns

If GLFW has been initializedreturns the DPI scale of the primary monitor. Otherwise, returns 1.

Definition at line 584 of file ImguiHelper.cpp.

    {
        SPICES_PROFILE_ZONE;
 
        // Cached DPI scale, so that this doesn't change after the first time code calls getDPIScale.
        // A negative value indicates that the value hasn't been computed yet.
        static float cached_dpi_scale = -1.0f;
 
        if (cached_dpi_scale < 0.0f)
        {
            // Compute the product of the monitor DPI scale and any DPI scale
            // set in the NVPRO_DPI_SCALE variable.
            cached_dpi_scale = 1.0f;
 
            GLFWmonitor* monitor = glfwGetPrimaryMonitor();
            if (monitor != nullptr)
            {
                float y_scale;
                glfwGetMonitorContentScale(monitor, &cached_dpi_scale, &y_scale);
            }
            // Otherwise, GLFW isn't initialized yet, but might be in the future.
            // (Note that this code assumes all samples use GLFW.)
 
            // Multiply by the value of the NVPRO_DPI_SCALE environment variable.
            const char* dpi_env = getenv("NVPRO_DPI_SCALE");
            if (dpi_env)
            {
                const float parsed_dpi_env = strtof(dpi_env, nullptr);
                if (parsed_dpi_env != 0.0f)
                {
                    cached_dpi_scale *= parsed_dpi_env;
                }
            }
 
            cached_dpi_scale = (cached_dpi_scale > 0.0f ? cached_dpi_scale : 1.0f);
        }
 
        return cached_dpi_scale;
    }

Referenced by SetFonts().