C# 无法使用TextRenderer获取DrawnText的正确大小
Im使用以下代码在位图上绘制文本C# 无法使用TextRenderer获取DrawnText的正确大小,c#,.net,bitmap,gdi+,system.drawing,C#,.net,Bitmap,Gdi+,System.drawing,Im使用以下代码在位图上绘制文本 GraphicsPath pth = new GraphicsPath(); var style = (int)myfont.Style; pth.AddString(tcaption.Text, myfont.FontFamily, style, myfont.Size, point, StringFormat.GenericTypographic); p = new Pen(new SolidBrush(bc), 2f); mygraphics.DrawPa
GraphicsPath pth = new GraphicsPath();
var style = (int)myfont.Style;
pth.AddString(tcaption.Text, myfont.FontFamily, style, myfont.Size, point, StringFormat.GenericTypographic);
p = new Pen(new SolidBrush(bc), 2f);
mygraphics.DrawPath(p, pth);
我正在使用textdrenderer
来测量字符串的大小
int Width = TextRenderer.MeasureText(tcaption.Text, myfont).Width;
但这不会产生正确大小的绘制字符串;与所绘制字符串的实际大小相差约20-30%
我做错了什么?请给我一些建议
更新:
我想在位图上绘制一个文本和一个图像,所以为了适应这两种情况,我创建了一个这样的位图
intWidth = TextRenderer.MeasureText(tcaption.Text, cfont).Width + image.Width;
intHeight = TextRenderer.MeasureText(tcaption.Text, cfont).Height +image.Height;
tempimage= new Bitmap(intWidth, intHeight);
using (Graphics newg = Graphics.FromImage(tempimage))
po=new Point(textposx, textposy);
newg.SmoothingMode = SmoothingMode.AntiAlias;
GraphicsPath pth = new GraphicsPath();
var style = (int)myfont.Style;
pth.AddString(tcaption.Text, myfont.FontFamily, style, myfont.Size, po,
StringFormat.GenericTypographic);
newg.FillPath(new SolidBrush(fc), pth);
Rectangle nrect = new Rectangle(imageposx, imageposy, image.Width,
image.Height);
objGraphics = Graphics.FromImage(tempimage);
objGraphics.DrawImage(image, nrect);
然后我从位图创建图形对象,如下所示
intWidth = TextRenderer.MeasureText(tcaption.Text, cfont).Width + image.Width;
intHeight = TextRenderer.MeasureText(tcaption.Text, cfont).Height +image.Height;
tempimage= new Bitmap(intWidth, intHeight);
using (Graphics newg = Graphics.FromImage(tempimage))
po=new Point(textposx, textposy);
newg.SmoothingMode = SmoothingMode.AntiAlias;
GraphicsPath pth = new GraphicsPath();
var style = (int)myfont.Style;
pth.AddString(tcaption.Text, myfont.FontFamily, style, myfont.Size, po,
StringFormat.GenericTypographic);
newg.FillPath(new SolidBrush(fc), pth);
Rectangle nrect = new Rectangle(imageposx, imageposy, image.Width,
image.Height);
objGraphics = Graphics.FromImage(tempimage);
objGraphics.DrawImage(image, nrect);
@汉斯·帕桑
我还尝试了Graphics.MeasureString
作为TextRenderer的替代品
现在我设置了文本和图像的位置,我需要在左上角绘制图像。。所以
imageposy = 0;
imageposx = 10;
textposy = image.Height;
textposx = 0;
然后我像这样画文本
intWidth = TextRenderer.MeasureText(tcaption.Text, cfont).Width + image.Width;
intHeight = TextRenderer.MeasureText(tcaption.Text, cfont).Height +image.Height;
tempimage= new Bitmap(intWidth, intHeight);
using (Graphics newg = Graphics.FromImage(tempimage))
po=new Point(textposx, textposy);
newg.SmoothingMode = SmoothingMode.AntiAlias;
GraphicsPath pth = new GraphicsPath();
var style = (int)myfont.Style;
pth.AddString(tcaption.Text, myfont.FontFamily, style, myfont.Size, po,
StringFormat.GenericTypographic);
newg.FillPath(new SolidBrush(fc), pth);
Rectangle nrect = new Rectangle(imageposx, imageposy, image.Width,
image.Height);
objGraphics = Graphics.FromImage(tempimage);
objGraphics.DrawImage(image, nrect);
现在我画了这样的图像
intWidth = TextRenderer.MeasureText(tcaption.Text, cfont).Width + image.Width;
intHeight = TextRenderer.MeasureText(tcaption.Text, cfont).Height +image.Height;
tempimage= new Bitmap(intWidth, intHeight);
using (Graphics newg = Graphics.FromImage(tempimage))
po=new Point(textposx, textposy);
newg.SmoothingMode = SmoothingMode.AntiAlias;
GraphicsPath pth = new GraphicsPath();
var style = (int)myfont.Style;
pth.AddString(tcaption.Text, myfont.FontFamily, style, myfont.Size, po,
StringFormat.GenericTypographic);
newg.FillPath(new SolidBrush(fc), pth);
Rectangle nrect = new Rectangle(imageposx, imageposy, image.Width,
image.Height);
objGraphics = Graphics.FromImage(tempimage);
objGraphics.DrawImage(image, nrect);
如您所见,我需要向imageposition x坐标添加偏移量10
,以纠正测量问题
希望我的更新能为这个问题提供更多信息。。。我做错了什么?
请给我一些建议 使用GraphicsPath而不是使用TextRenderer:
var path = new GraphicsPath();
path.AddString(text, font.FontFamily, (int)font.Style, size, new Point(0, 0), StringFormat.GenericTypographic);
var area = Rectangle.Round(path.GetBounds());
以下是生成文本大小的图像的示例代码:
private Image DrawText(String text, Font font, int size, Color textColor, Color backColor)
{
var path = new GraphicsPath();
path.AddString(text, font.FontFamily, (int)font.Style, size, new Point(0, 0), StringFormat.GenericTypographic);
var area = Rectangle.Round(path.GetBounds());
Rectangle br = Rectangle.Round(path.GetBounds());
var img = new Bitmap(br.Width, br.Height);
var drawing = Graphics.FromImage(img);
drawing.TextRenderingHint = System.Drawing.Text.TextRenderingHint.AntiAliasGridFit;
drawing.SmoothingMode = SmoothingMode.HighSpeed;
drawing.Clear(backColor);
drawing.TranslateTransform((img.Width - br.Width) / 2 - br.X, (img.Height - br.Height) / 2 - br.Y);
drawing.FillPath(Brushes.Black, path);
Brush textBrush = new SolidBrush(textColor);
drawing.Save();
textBrush.Dispose();
drawing.Dispose();
return img;
}
以下是示例结果:
您已经看过MSDN文档了吗?它注意到,MeasureText方法要求将文本绘制在一行上。因此,如果
t选项。文本是否为可能相关的多行?我不太熟悉textrender
对象思想什么是我的图形?请阅读以下内容:,否则可能有错误的TextFormatFlags。或者,您可能想尝试此方法:这可能也是您感兴趣的,这是关于在textrenderer中填充的:错误的文本渲染引擎,您必须使用Graphics.MeasureString()才能进入大致范围。当然,您应该在问题中提到这一点。您使用的字体高度不同,请使用FontFamily.GetEmHeight()。我已经尝试过这个。。但它并没有达到预期的目的。@techno请看一下我的最新答案。我能够得到文本的精确大小,并创建包含该文本的图像。您可以更改SmoothingMode
以获得不同的结果,但这应该是一个良好的开端。如果有些东西不起作用,请在你的问题中再贴一些代码,也许可以说明你想要的结果。你的答案是正确的。。但我改变了我的方法。我将绘制的位图中的空白部分修剪掉,从而将文本转换为图像。@techno很高兴听到您能够解决您的问题:)如果您愿意,您可以将代码作为答案共享,以便任何有类似问题的人都能找到有效的解决方案。