rgb2long.txt

将用RGB表示的颜色值转换为长整型表示的颜色值

//**************************************
//     
// Name: Convert 3 values (R,G&B) into a
//     Long value of the color
// Description:The code take three value
//     s REd, Green and Blue and returns a Long
//     form of the Compleate color
// By: Robert 'Bob' Engelhardt
//
// Inputs:Red, Green, Blue each as an in
//     t
//
// Returns:Color as a long value
//
// Assumes:nothing fancy just quick and 
//     simnple code
//

long MakeColor(int Red,int Green,int Blue)


    {
    // constrain to be proper size
    if(Red > 255) Red =255;
    if(Red<0) Red=0;
    if(Green > 255) Green=255;
    if(Green<0) Green=0;
    if(Blue > 255) Blue=255;
    if(Blue<0) Blue=0;
    Red*=65536; // add trailing zeros in hex (XX0000)
    Green*=256; // add trailing zeros in hex ( XX00)
    return(Red+Green+Blue);
}