Feature request: potrace color option -C #rrggbb, --color #rrggbb

[leandro2222]

this potrace option would be useful in the cases when we have a black image on transparent background because the current javascript version transforms the alpha channel in black so dark pictures with transparent backgrounds don't show up.

ps: great work, thanks and congratulations.

[leandro2222]

Workaround that I'm currently using to let the alpha white (don't work in Firefox and MS Edge when the image comes from the clipboard because their clipboard dont support alpha):

function loadCanvas() {
imgCanvas.width = imgElement.width;
imgCanvas.height = imgElement.height;
var ctx = imgCanvas.getContext('2d');
ctx.beginPath();
ctx.rect(0, 0, imgElement.width, imgElement.height);
ctx.fillStyle = "white";
ctx.fill();
ctx.drawImage(imgElement, 0, 0);
}

DEMO