How can I draw text with different stroke and fill colors on images with python?

问题:

How can I draw text with different stroke and fill colors on images with python?

Here is some text with red stroke and gray fill.

I tried to do this with PIL but there was no option for setting the stroke color.

回答1:

Using cairo (with much code taken from here):

import cairo  def text_extent(font, font_size, text, *args, **kwargs):     surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 0, 0)     ctx = cairo.Context(surface)     ctx.select_font_face(font, *args, **kwargs)     ctx.set_font_size(font_size)     return ctx.text_extents(text)  text='Example' font="Sans" font_size=55.0 font_args=[cairo.FONT_SLANT_NORMAL] (x_bearing, y_bearing, text_width, text_height,  x_advance, y_advance) = text_extent(font, font_size, text, *font_args) surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, int(text_width), int(text_height)) ctx = cairo.Context(surface) ctx.select_font_face(font, *font_args) ctx.set_font_size(font_size) ctx.move_to(-x_bearing, -y_bearing) ctx.text_path(text) ctx.set_source_rgb(0.47, 0.47, 0.47) ctx.fill_preserve() ctx.set_source_rgb(1, 0, 0) ctx.set_line_width(1.5) ctx.stroke()  surface.write_to_png("/tmp/out.png") 

回答2:

PIL doesn't support this but you can fake it: Render the text four or eight times with the outline color using one pixel offsets:

x+1,y x-1,y x  ,y+1 x  ,y-1  

(four times version)

x+1,y+1 x  ,y+1 x-1,y+1  x+1,y x-1,y  x+1,y-1 x  ,y-1  x-1,y-1 

(eight times version)

and then once at x,y with the fill color.

回答3:

Using imagemagick:

import subprocess  args = {     'bgColor': 'transparent',     'fgColor': 'light slate grey',     'fgOutlineColor': 'red',     'text': 'Example',     'size': 72,     'geometry': '350x100!',     'output': '/tmp/out.png',     'font': 'helvetica' }  cmd = ['convert', 'xc:{bgColor}', '-resize', '{geometry}', '-gravity', 'Center',         '-font', '{font}', '-pointsize', '{size}', '-fill', '{fgColor}',         '-stroke', '{fgOutlineColor}', '-draw', "text 0,0 '{text}'", '-trim', '{output}'] cmd = [item.format(**args) for item in cmd]  proc = subprocess.Popen(cmd) proc.communicate() 

回答4:

You can use Inkscape:

import subprocess subprocess.call("inkscape in.svg --export-text-to-path --export-plain-svg out.svg", shell = True) 

note: you have to download Inkscape to use this, so not practical for permanent use

文章来源: How can I draw text with different stroke and fill colors on images with python?