Module: DynamicImage::ImageProcessor::Frames

Included in:

DynamicImage::ImageProcessor

Defined in:

lib/dynamic_image/image_processor/frames.rb

Overview

ImageProcessor::Frames

Support for animated GIF and WebP images, which vips represents as a single tall image with a page-height of one frame. Operations are applied to each frame and the results reassembled.

Instance Method Summary

• #frame(index) ⇒ DynamicImage::ImageProcessor

  Extracts a single frame from a multi-frame image.

• #frame_count ⇒ Integer

  Returns the number of frames.

Instance Method Details

#frame(index) ⇒ DynamicImage::ImageProcessor

Extracts a single frame from a multi-frame image.

Parameters:

• index (Integer) —

  the frame to extract, zero based

Returns:

• (DynamicImage::ImageProcessor) —

  a new processor

# File 'lib/dynamic_image/image_processor/frames.rb', line 14

def frame(index)
  apply extract_frame(index)
end

#frame_count ⇒ Integer

Returns the number of frames. Still images have one.

Returns:

• (Integer)

# File 'lib/dynamic_image/image_processor/frames.rb', line 21

def frame_count
  image.get("height") / size.y
end