将RGBA转换为十六进制或ARGB转换为十六进制 [英] Convert RGBA to Hex or ARGB to Hex
问题描述
我试图将Flash应用程序中的十进制颜色代码转换为HTML显示的十六进制颜色代码
我有这些数字它们是8位数字,但我不确定它们是ARGB还是RGBA。有没有一种方法可以从颜色代码本身了解这一点?
我有一个javascript函数可以将十进制转换为十六进制数字,但我没有补偿值(或删除它)。你能帮我修复我的函数,从RGB十进制代码中提取/去除A值吗?
$ p $函数decimalToHex(num)
{
if(num == null || num ==undefined){return0xFFFFFF; }
var intNum =(parseInt(num,10))& 8; / /这是否删除最重要的8位?
return intNum.toString(16);
最高字节,然后按位AND与0x00FFFFFF删除。所以:
var intNum =(parseInt(num,10))&至0x00FFFFFF;
或者,如果alpha值在最低字节中,则按位AND与0xFFFFFF00,然后右移8: p>
var intNum =(parseInt(num,10)& 0xFFFFFF00)>> 8;
I am trying to convert a decimal colour code from a Flash Application into a hexadecimal colour code for HTML display
I have these numbers which are 8 digits long, but I am not sure if they are ARGB or RGBA. Is there a way to figure this out from the colour codes themselves?
I have a javascript function that can convert a decimal to a hexadecimal number but I am not compensating for the A value(or removing it). Can you help me fix my function to extract/remove the A value from the RGB decimal code?
function decimalToHex( num )
{
if (num == null || num == "undefined") { return "0xFFFFFF"; }
var intNum = (parseInt(num,10)) & 8; // does this remove the most significant 8 bits?
return intNum.toString(16);
}
If the alpha value is in the highest byte, then bitwise AND with 0x00FFFFFF to remove that. So:
var intNum = (parseInt(num,10)) & 0x00FFFFFF;
Or, if the alpha value is in the lowest byte, bitwise AND with 0xFFFFFF00, then shift right 8:
var intNum = (parseInt(num,10) & 0xFFFFFF00) >> 8;
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