Incorrect transparent GIF blending when it's transparent color is not black

[atomizer]

The value of the color marked as transparent is not discarded, but blended with background using "add" operation if the background isn't transparent.

For example, here is an image that is transparent, but the color of the transparent index in it's palette is set to #804000:

var assert = require('assert')
var Canvas = require('canvas')

var c = new Canvas(150, 150)
var ctx = c.getContext('2d')

// fill background with something non-transparent
ctx.fillStyle = 'rgb(0, 100, 200)'
ctx.fillRect(0, 0, 150, 150)
// load the (supposedly) transparent gif
var i = new Canvas.Image()
i.src = 'transparent.gif' // https://i.imgur.com/XCz0eVi.gif
// draw it on top of our background
ctx.drawImage(i, 0, 0)
// expect no visible change in the canvas
var pixel = ctx.getImageData(0, 0, 1, 1).data
assert.deepEqual(pixel, [0, 100, 200, 255])

[danschumann]

Is there still no fix for this? I noticed a dark border on my gif

[danschumann]

i take that back, it's working properly. the dark border is due to my pixel by pixel resize not properly handling it.

[atomizer]

Updated test code and reuploaded the sample image.