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Addressing seams in transparent images on Firefox

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This commit is contained in:
Ian Gilman 2019-09-26 09:41:59 -07:00
parent f803fb9ad4
commit db71054978
1 changed files with 9 additions and 2 deletions
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11
src/tile.js
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@ -353,8 +353,15 @@ $.Tile.prototype = {
//an image with an alpha channel, then the only way
//to avoid seeing the tile underneath is to clear the rectangle
if (context.globalAlpha === 1 && this._hasTransparencyChannel()) {
//clearing only the inside of the rectangle occupied
//by the png prevents edge flikering
if ($.Browser.vendor === $.BROWSERS.FIREFOX) {
// Round to the nearest whole pixel so we don't get seams from overlap. This is only
// an issue on Firefox, so we only do it there.
position.x = Math.round(position.x);
position.y = Math.round(position.y);
size.x = Math.round(size.x);
size.y = Math.round(size.y);
}
context.clearRect(
position.x,
position.y,