Question

在SQL Server 2012中，您如何将由int（存储为0xBBGGRR）表示的颜色转换为格式为R=123, G=234, B=12的字符串？我们将忽略alpha部分。

E.g。给定值0xff223344的整数，您将获得R=68, G=51, B=34。

Answer 1

使用按位和（＆amp;）运算符：

declare @i int
set @i=0xff223344

select 
  'R=' +   cast(@i & 0xFF as varchar(3)) +
  ', G=' + cast((@i & 0xFF00) / 0x100 as varchar(3)) +
  ', B=' + cast((@i & 0xFF0000) / 0x10000 as varchar(3))

Answer 2

Declare @i int
Set @i=0xff223344
select 
  'R=' + Cast(Cast(SubString(CAST(@i as BINARY(4)),4,1) as int) as Varchar(3))
+ ', G=' + Cast(Cast(SubString(CAST(@i as BINARY(4)),3,1) as int) as Varchar(3))
+ ', B=' + Cast(Cast(SubString(CAST(@i as BINARY(4)),2,1) as int) as Varchar(3))

Answer 3

这样的解决方案怎么样？

declare @i int = 0x223344

select 'R=' + cast (@i % 256 as varchar)
    + ', G=' + cast (@i / 256 % 256 as varchar)
    + ', B=' + cast (@i / 65536 % 256 as varchar)

或者如果你有alpha通道的ff：

declare @i int = 0xff443322

if @i < 0
    set @i = @i % cast(0x1000000 as int) - cast(0xff000000 as int)

select 'R=' + cast (@i % 256 as varchar)
    + ', G=' + cast (@i / 256 % 256 as varchar)
    + ', B=' + cast (@i / 65536 % 256 as varchar)

如何从表示为整数的颜色输出RGB值？

3 个答案: