我的图像是100X100,希望以200X0的空白白色形象将其集中起来。
我如何对待图像和鲁比,或另一个第三方包? 如果没有图象或自由吗? 我知道,这种限制非常紧张,但这两个因素对我来说是很 la的,因为我的当地Mac和我的Yard 亚马孙胜地都没有工作。 我能够在我的Mac上使用自由Type,但未能在亚马孙云上部署。 我可以在我的Mac安装RMagick,但可以在我的亚马孙云上安装。
除此以外,我感到,图像Magick应自动安装在每台六氯环己烷和麦克风机上。 拯救一些人的麻烦。 如此之少的代价是巨大的痛苦。
最好的办法是使用一个纯废墟图书馆,例如http://docs.seattlerb.org/png/,来自西雅图.rb或。
It s quite easy to follow. You should create a white 200x200 canvas and load your image onto it, or if you find it easier, compose images using alpha blending.
(以uck为例):
# Compose images using alpha blending.
avatar = ChunkyPNG::Image.from_file( avatar.png )
badge = ChunkyPNG::Image.from_file( no_ie_badge.png )
avatar.compose!(badge, 10, 10)
avatar.save( composited.png , :fast_rgba) # Force the fast saving routine.
如果你真的需要一种新的形象,而仅仅为了展示主人,使用 c和(或) j,就会更加容易。
也许会回避这个问题,但你是否试图通过家佣将图像Magick安装在你的Mac? 这简明扼要,只是安装了土机和打打了一架指挥:
brew install imagemagick
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