如何给单个字符着色并保持适当的间距/字距/对齐方式? [英] How to color individual characters and maintain proper spacing / kerning / alignment?

问题描述

我想使用Graphics.DrawString使用单独的颜色绘制字符.

I want to use Graphics.DrawString to draw characters using individual colors.

问题在于，每次调用DrawString时，我都必须知道相对于其他字符将其放置在何处(使用Point或Rectangle).

The problem is that each time I call DrawString, I have to know where to position it (either using a Point or a Rectangle) relative to the other characters.

考虑到在带StringFormat的矩形中使用DrawString时发生的字距调整和换行，这几乎是可能的. StringFormat对于指定对齐方式，换行，修剪等非常重要.

This is almost possible when taking into account the kerning and wrapping that happens when you use DrawString in a rectangle with a StringFormat. The StringFormat is important to specify alignment, wrapping, trimming, etc.

理想情况下，我可以告诉DrawString如何分别为每个字符着色.另一个选择是，如果我可以使用StringFormat测量矩形中的字符串，然后检索每个字符索引的X和Y位置，以便可以使用自己的画笔绘制每个.

Ideally I'd be able to tell DrawString how to color each character individually. The other option is if I can measure a string in a rectangle using a StringFormat and then retrieve the X and Y positions of each character index, so that I can draw each one with its own brush.

我尝试单独测量每个字符，但是由于字符串中字符的组合宽度与单独测量每个字符的宽度不同，因此无法正常工作.

I tried to measure each character individually, but that will not work because a combination of characters in a string is not the same width as each character measured on its own.

编辑: 这是当我取一个字符串，获取Region数组，用红色和蓝色交替填充这些区域，然后尝试在这些区域中绘制每个字符时发生的事情:

EDIT: Here is what is happening when I take a string, get the Region array, fill those regions with red and blue alternating, and then try to draw each individual character in those regions:

我正在按如下方式调用DrawString:

I am calling DrawString as follows:

g.DrawString(character, font, brush, region.GetBounds(g));

还尝试了以下操作:

Rectangle bounds = Region.GetBounds(g);
g.DrawString(character, font, brush, new PointF(bounds.Left, bounds.Top));

然后

g.DrawString(character, font, brush, region.GetBounds(g), stringFormat);

相同的结果.

推荐答案

GDI +的DrawString对结果进行填充，解释了得到的左偏移量.

GDI+'s DrawString is padding the result which explains the left offset you get.

尝试使用GDI来测量字符串.幸运的是，这已经实现，并且可以通过TextRenderer()对象f.ex从.Net轻松访问:

Try to use the GDI to measure the string. Luckily this is implemented and easy to reach from .Net through the TextRenderer() object, f.ex:

Size sz = TextRenderer.MeasureText(character, 
                                   font, 
                                   new Point(Integer.MaxValue, Integer.MaxValue),
                                   TextFormatFlags.NoPadding);

您还可以查看TextRenderer.DrawText().

当然，您始终可以修改StringFormat实例以使用中心对齐和DrawString并使用矩形而不是点.

Of course, you can always modify your StringFormat instance to use center alignment and DrawString with a rectangle instead of point.

StringFormat sf = new StringFormat();
sf.Alignment = StringAlignment.Center;
Rectangle cr = new Rectangle(x, y, w, h); //same as the colored region
g.DrawString(character, font, brush, cr, sf);

希望这会有所帮助.

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