Question

我一直在寻找在开放式办公室xml docx文档中对颜色应用tint和shade的算法。我终于找到了一个可能的答案at this link。但现在我无法理解代码，因为我不知道它是什么语言，所有0#和1#值对我没有任何意义。例如，在链接中的以下函数中，0#和1#代表什么？

Public Function sRGB_to_scRGB(value As Double)
  If value < 0# Then
    sRGB_to_scRGB = 0#
    Exit Function
  End If
  If value <= 0.04045 Then
    sRGB_to_scRGB = value / 12.92
    Exit Function
  End If
  If value <= 1# Then
    sRGB_to_scRGB = ((value + 0.055) / 1.055) ^ 2.4
    Exit Function
  End If
  sRGB_to_scRGB = 1#
End Function

或者任何人都可以告诉我它是什么语言？

Thanx提前!!

Answer 1

这是Visual Basic（在链接中很难过） 1＃表示整数see this

为1

我在我的Ruby程序中使用该代码 - 也许这更容易阅读

def sRGB_to_scRGB(color)
  if color < 0
    0
  elsif color <= 0.0031308
    color * 12.92
  elsif color < 1
    1.055 * (color ** (1.0/2.4)) - 0.055
  else
    1
  end
end

Answer 2

我也阅读了你上面链接的帖子，对我来说非常好。如果你仍然不明白，我在这里给你留下伪代码的翻译：

//Given a string with the hexadecimal RGB color, 
//separate it in its three components in integer

Integer red = fromHexaToInt(RGB_string.Substring(0,2));
Integer green = fromHexaToInt(RGB_string.Substring(2,4));
Integer blue = fromHexaToInt(RGB_string.Substring(4,6));

//Convert each integer to a proportion of the maximum value (255)

Double dRed = red / 255;
Double dGreen = green / 255;
Double dBlue = blue / 255;

//Apply the conversion function for each one

dRed = sRGB_to_scRGB(dRed);
dGreen = sRGB_to_scRGB(dGreen);
dBlue = sRGB_to_scRGB(dBlue);

//Apply to each one the shade (must be a number between 0 and 1), let's say 0.4 
//NOTE: if you want to use tint, just call that function instead of shade

Double level = 0.4;

dRed = shade(dRed, level);
dGreen = shade(dGreen, level);
dBlue = shade(dBlue, level);

//Apply the inverse of the conversion function

dRed = scRGB_to_sRGB(dRed);
dGreen = scRGB_to_sRGB(dGreen);
dBlue = scRGB_to_sRGB(dBlue);

//Recover the integer value from the converted new color by multiplying and rounding it

red = round(dRed * 255)
green = round(dGreen * 255)
blue = round(dBlue * 255)

//Transform the integers back to hexadecimal

String strRed = fromIntToHexa(red);
String strGreen = fromIntToHexa(green);
String strBlue = fromIntToHexa(blue);

//Concatenate them all

String newColor = strRed + strGreen + strBlue;

你调用的函数可能是这样的：

//Conversion function
function sRGB_to_scRGB(value){
    if (value < 0){
        return 0;
    }
    if(value <= 0.04045){ 
        return value / 12.92;
    }
    if (value <= 1){
        return ((value + 0.055) / 1.055) ^ 2.4);   
    }
    return 1;
}

//Function to shade the color
function shade(color, shade){
    if(color * shade < 0){
        return 0;
    }
    else{
        if(color * shade > 1){
            return 1;
        }
        else{
            return color * shade;
        }
    }
}

//Function to tint color
function tint(color, tint){
    if(tint > 0){
        return color * (1-tint)+tint;
    }
    else{
        return color * (1 + tint);
    }
}

//Reconversion function      
function scRGB_to_sRGB(value){
    if(value < 0){
        return 0;
    }
    if (value <= 0.0031308){
        return value * 12.92;
    }   
    if(value < 1){
        return 1.055 * (value ^ (1 / 2.4)) - 0.055;
    } 
    return 1;       
}

希望它会有用。

需要帮助理解代码片段以在开放式办公室xml中应用色调和阴影

2 个答案: