The PixelHolder RubyGem - A RubyGem for creating image placeholders.
Check out PixelHolder Sinatra for a sample implementation.
gem install pixelholder
Flickr Images:
image = PixelHolder::Flickr.new(options = {})
Gradient:
image = PixelHolder::Gradient.new(options = {})
Solid Fill:
image = PixelHolder::Fill.new(options = {})
The PixelHolder classes have an accessible canvas variable (our generated image). To get the image as a blob:
blob = image.canvas.to_blob
PixelHolder can also be extended by extending the base class PixelHolder::Base. This allows you to create customised placeholder classes quickly without setting up the foundations needed.
options = {
width: 600,
height: 300,
text: "whatever you want to go here can go here!", # Your overlay text. Set to "show_dimensions" to show image dimensions
text_color: "#ffffff", # Color for overlay text
image_format: "jpg", # Image format - jpg, png etc.
# Fill only
background_color: "#0099cc", # Six character hex color code
# Gradient only
direction: "horizontal", # Horizontal or vertical gradient. Default vertical.
start_color: "#ffffff", # Six character hex color code
end_color: "#0099cc", # Six character hex color code
# Flickr Only
flickr_tags: "cat,dog", # Comma separated tags.
flickr_key: "<your flickr key>",
flickr_secret: "<your flickr secret>",
seed: 4 # Integer to select a different image result from Flickr
}