#include<hgl/type/Color4f.h>
namespace hgl
{
    void Color4f::Use(COLOR_ENUM ce,float ta)
    {
        r=prv_color[ce].r;
        g=prv_color[ce].g;
        b=prv_color[ce].b;
        a=ta;
    }

    void Color4f::Clamp()
    {
        if(r<0)r=0;if(r>1)r=1;
        if(g<0)g=0;if(g>1)g=1;
        if(b<0)b=0;if(b>1)b=1;
        if(a<0)a=0;if(a>1)a=1;
    }
    //--------------------------------------------------------------------------------------------------
    /**
    * 求当前颜色过渡到另一颜色时某一比例时的颜色
    * @param nr,ng,nb 新的颜色
    * @param pos 过渡比例,0时为当前的颜色,1时为nr,ng,nb
    */
    void Color4f::To(float nr,float ng,float nb,float pos)
    {
        if(pos==0)return;
        if(pos==1)
        {
            r=nr;
            g=ng;
            b=nb;
            return;
        }

        r+=(nr-r)*pos;
        g+=(ng-g)*pos;
        b+=(nb-b)*pos;
    }
    //--------------------------------------------------------------------------------------------------
    void Color4f::Grey()
    {
        float lum=r*0.299+g*0.587+b*0.114;

        r=lum;
        g=lum;
        b=lum;
    }
    //--------------------------------------------------------------------------------------------------
    bool Color4f::operator == (const Color4f &v)
    {
        if(r!=v.r)return(false);
        if(g!=v.g)return(false);
        if(b!=v.b)return(false);
        if(a!=v.a)return(false);

        return(true);
    }
    //--------------------------------------------------------------------------------------------------
    bool Color4f::operator != (const Color4f &v)
    {
        if(r!=v.r)return(true);
        if(g!=v.g)return(true);
        if(b!=v.b)return(true);
        if(a!=v.a)return(true);

        return(false);
    }
    //--------------------------------------------------------------------------------------------------
}