Horizontal Image Reverse

[BlackBulletIV]

Just thought I'd share my horizontal image reversing program I made. I've included a flaming horse image in it, so all you have to do is run the .love file. (But you can also specify your own image via the terminal) Here's the code:

Code: Select all

function love.load(args)
  data = love.image.newImageData(args[2] or 'flaming_horse.jpg')
  half = {}
  
  for x = 0, data:getWidth() / 2 - 1 do
    half[x] = {}
    
    for y = 0, data:getHeight() - 1 do
      r, g, b, a = data:getPixel(x, y)
      half[x][y] = { r, g, b, a }
    end
  end

  data:mapPixel(function(x, y, r, g, b, a)
    if x < data:getWidth() / 2 then
      return data:getPixel(data:getWidth() - x - 1, y)
    else
      return unpack(half[data:getWidth() - x - 1][y])
    end
  end)
  
  img = love.graphics.newImage(data)
  img2 = love.graphics.newImage(args[2] or 'flaming_horse.jpg')
end

function love.draw()
  love.graphics.draw(img)
  love.graphics.draw(img2, 270)
end

[crow]

nice

[BlackBulletIV]

Thanks

[headchant]

That's nice! Maybe I didn't get it but whats wrong with the negative scale on x axis (edit: as not described in the wiki)?

something like this:

Code: Select all

function love.draw()
	love.graphics.draw(img, 100, 100)
	love.graphics.draw(img, 600, 100,0,-1,1)
end

[BlackBulletIV]

Thanks. I honestly forgot about a negative scale, however I didn't do this for any purpose... apart from the desire to do some image manipulation. The main thing you could use this for, is reversing images for saving them, rather than displaying them.