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我可以使用 PIL 获取两个字符的字距调整值吗？

发布于 2024-08-18 15:53:26 字数 34 浏览 6 评论 0原文

是否可以使用 PIL 获取字体中两个字符的字距调整值？

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鲜血染红嫁衣 2024-08-25 15:53:26

正如伊格纳西奥所说，答案是否定的。

这是这个答案的严肃部分。现在，对于完全不同的东西：

您可以近似 a （不是 the，因为您无法单独使用 PIL 知道字体的设计 em 大小是多少）使用以下方法调整字距值：

import ImageFont
SAMPLE_SIZE= 128 # should provide sufficient resolution for kerning values

def get_a_kerning_value(font_descriptor, char1, char2):
    """See if there is some kerning value defined for a pair of characters
    Return the kerning value as an approximated percentage of the row height."""

    imagefont= ImageFont.truetype(font_descriptor, SAMPLE_SIZE)

    width1= imagefont.getsize(char1)[0]
    width2= imagefont.getsize(char2)[0]
    widths, height= imagefont.getsize(char1 + char2)

    return (widths - (width1 + width2))/float(height)

The answer is, as Ignacio said, no.

That was the serious part of this answer. And now, for something completely different:

you can approximate a (not the, since you can't know by using PIL alone what is the design em size of the font) kerning value using something like:

import ImageFont
SAMPLE_SIZE= 128 # should provide sufficient resolution for kerning values

def get_a_kerning_value(font_descriptor, char1, char2):
    """See if there is some kerning value defined for a pair of characters
    Return the kerning value as an approximated percentage of the row height."""

    imagefont= ImageFont.truetype(font_descriptor, SAMPLE_SIZE)

    width1= imagefont.getsize(char1)[0]
    width2= imagefont.getsize(char2)[0]
    widths, height= imagefont.getsize(char1 + char2)

    return (widths - (width1 + width2))/float(height)

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