Get and modify the image dimension (width and height) of various image types.
Supported types:
- through
stb_image.h: JPG, PNG, TGA, BMP, PSD, GIF, HDR, PIC - through
libwebp: WebP
- Add the dependency to your
shard.yml:
dependencies:
image_size:
github: hkalexling/image_size.cr- Run
shards install
require "image_size"
# Get dimension from the path to the image file
size = ImageSize.get "test.png"
pp size.width
pp size.height
# Get dimension from binary data
file = File.new "test.png"
bytes = Bytes.new file.size
file.read bytes
file.close
size = ImageSize.get bytes
pp size.width
pp size.height
# Resize the image width to 1024. The height is automatically calculated
# to keep the aspect ratio
bytes = ImageSize.resize "test.png", width: 1024
File.write "test-1024.png", bytes
# Resize the image height to 256. The width is automatically calculated
# to keep the aspect ratio
bytes = ImageSize.resize "test.png", height: 256
File.write "test-256.png", bytes
# Resize the image dimension to 1024 x 1024
bytes = ImageSize.resize "test.png", width: 1024, height: 1024
File.write "test-1024-1024.png", bytes- Alex Ling - creator and maintainer
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