python 魔杖：创建文本阴影

Question

有人试过用 python 魔杖创建阴影吗？我浏览了这个文档，但找不到 dropshadow 属性。

http://docs.wand-py.org/en/0.4.1/wand/drawing.html

根据 imagemagick 的说法，可以通过以下方式实现： http://www.imagemagick.org/Usage/fonts/

   convert -size 320x100 xc:lightblue -font Candice -pointsize 72 \
           -fill black -draw "text 28,68 'Anthony'" \
           -fill white -draw "text 25,65 'Anthony'" \
           font_shadow.jpg

如何在 python 中进行调整？

Answer 1

Have anyone tried creating dropshadow with python wand?

如果您搜索 wand 标签，可以找到一些技巧和示例。

I went through this doc and couldn't find dropshadow attribute.

您不会看到属性，因为阴影在矢量绘图上下文中毫无意义。（至少我认为）

这是创建文本阴影的一种途径/方法。

绘制阴影
应用过滤器（可选）
绘制文本

from wand.color import Color
from wand.compat import nested
from wand.drawing import Drawing
from wand.image import Image

dimensions = {'width': 450,
              'height': 100}

with nested(Image(background=Color('skyblue'), **dimensions),
            Image(background=Color('transparent'), **dimensions)) as (bg, shadow):
    # Draw the drop shadow
    with Drawing() as ctx:
        ctx.fill_color = Color('rgba(3, 3, 3, 0.6)')
        ctx.font_size = 64
        ctx.text(50, 75, 'Hello Wand!')
        ctx(shadow)
    # Apply filter
    shadow.gaussian_blur(4, 2)
    # Draw text
    with Drawing() as ctx:
        ctx.fill_color = Color('firebrick')
        ctx.font_size = 64
        ctx.text(48, 73, 'Hello Wand!')
        ctx(shadow)
    bg.composite(shadow, 0, 0)
    bg.save(filename='/tmp/out.png')

编辑这是另一个与用法示例相匹配的示例。

from wand.color import Color
from wand.drawing import Drawing
from wand.image import Image

# -size 320x100 xc:lightblue
with Image(width=320, height=100, background=Color('lightblue')) as image:
    with Drawing() as draw:
        # -font Candice
        draw.font = 'Candice'
        # -pointsize 72
        draw.font_size = 72.0
        draw.push()
        # -fill black
        draw.fill_color = Color('black')
        # -draw "text 28,68 'Anthony'"
        draw.text(28, 68, 'Anthony')
        draw.pop()
        draw.push()
        # -fill white
        draw.fill_color = Color('white')
        # -draw "text 25,65 'Anthony'"
        draw.text(25, 65, 'Anthony')
        draw.pop()
        draw(image)
    # font_shadow.jpg
    image.save(filename='font_shadow.jpg')

python 魔杖：创建文本阴影

python wand: creating text dropshadow

python

imagemagick

dropshadow

wand