python 魔杖 : creating text dropshadow

Question

有没有人试过用 python wand 创建阴影？我浏览了这个文档，找不到 dropshadow 属性。

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

---

根据 imagemagick 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，可以找到一些技巧和示例标签。

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方法。

1. 画阴影
2. 应用过滤器(可选)
3. 绘制文字

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')