draw_image always results in a 300x300 image

[JasonBarnabe]

origami/lib/origami/graphics/xobject.rb

Line 81 in ee7207c

@instructions << PDF::Instruction.new('cm', 300, 0, 0, 300, x, y)

This should allow passing in width and height parameters.

[gdelugre]

Actually those are just dummy values in the transformation matrix, they do not mean anything.

The support for drawing images in Origami is very limited. I don't think this is going to work with this code, there is no support of colorimetric spaces, image attributes and so on. I should probably just have raised a NotImplementedError.

[JasonBarnabe]

I'm adding images to PDFs with no problems other than this one. Those 300s really do represent the image's dimensions.

require 'origami'
include Origami

def add_kitty(cm_with_size)

  pdf = PDF.read('pdf-sample.pdf')
  page = pdf.get_page(1)

  img = Graphics::ImageXObject.from_image_file('1327.jpeg', 'jpg')
  img.Width  = 500
  img.Height = 422
  img.ColorSpace = Origami::Graphics::Color::Space::DEVICE_RGB
  img.BitsPerComponent = 8
  img.Interpolate = false
  page.add_xobject(img, :kitty)

  contents = Origami::ContentStream.new

  # Reimplementation of ContentStream#draw_image
  contents.instructions << PDF::Instruction.new('q')
  if cm_with_size
    contents.instructions << PDF::Instruction.new('cm', img.Width, 0, 0, img.Height, 0, 0)
  else
    contents.instructions << PDF::Instruction.new('cm', 300, 0, 0, 300, 0, 0)
  end
  contents.instructions << PDF::Instruction.new('Do', :kitty)
  contents.instructions << PDF::Instruction.new('Q')

  page.setContents([page.Contents, contents])

  pdf.save("pdf-with-kitty-#{cm_with_size ? 'cm_with_size' : 'cm_default'}.pdf")
end

add_kitty(true)
add_kitty(false)

Inputs:

pdf-sample.pdf

Outputs:

pdf-with-kitty-cm_default.pdf
pdf-with-kitty-cm_with_size.pdf