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No special raster reprojection handling for Chrome

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This commit is contained in:
Andreas Hocevar
2017-01-10 14:12:07 +01:00
parent 76f63c8162
commit 9a1adc43cd
1 changed files with 7 additions and 37 deletions
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44
src/ol/reproj.js
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@@ -7,30 +7,6 @@ goog.require('ol.math');
goog.require('ol.proj');
/**
* We need to employ more sophisticated solution
* if the web browser antialiases clipping edges on canvas.
*
* Currently only Chrome does not antialias the edges, but this is probably
* going to be "fixed" in the future: http://crbug.com/424291
*
* @type {boolean}
* @private
*/
ol.reproj.browserAntialiasesClip_ = (function() {
// Adapted from http://stackoverflow.com/questions/4565112/javascript-how-to-find-out-if-the-user-browser-is-chrome
var isOpera = navigator.userAgent.indexOf('OPR') > -1;
var isIEedge = navigator.userAgent.indexOf('Edge') > -1;
return !(
!navigator.userAgent.match('CriOS') && // Not Chrome on iOS
'chrome' in window && // Has chrome in window
navigator.vendor === 'Google Inc.' && // Vendor is Google.
isOpera == false && // Not Opera
isIEedge == false // Not Edge
);
})();
/**
* Calculates ideal resolution to use from the source in order to achieve
* pixel mapping as close as possible to 1:1 during reprojection.
@@ -211,20 +187,14 @@ ol.reproj.render = function(width, height, pixelRatio,
context.save();
context.beginPath();
if (ol.reproj.browserAntialiasesClip_) {
var centroidX = (u0 + u1 + u2) / 3, centroidY = (v0 + v1 + v2) / 3;
var p0 = ol.reproj.enlargeClipPoint_(centroidX, centroidY, u0, v0);
var p1 = ol.reproj.enlargeClipPoint_(centroidX, centroidY, u1, v1);
var p2 = ol.reproj.enlargeClipPoint_(centroidX, centroidY, u2, v2);
var centroidX = (u0 + u1 + u2) / 3, centroidY = (v0 + v1 + v2) / 3;
var p0 = ol.reproj.enlargeClipPoint_(centroidX, centroidY, u0, v0);
var p1 = ol.reproj.enlargeClipPoint_(centroidX, centroidY, u1, v1);
var p2 = ol.reproj.enlargeClipPoint_(centroidX, centroidY, u2, v2);
context.moveTo(p1[0], p1[1]);
context.lineTo(p0[0], p0[1]);
context.lineTo(p2[0], p2[1]);
} else {
context.moveTo(u1, v1);
context.lineTo(u0, v0);
context.lineTo(u2, v2);
}
context.moveTo(p1[0], p1[1]);
context.lineTo(p0[0], p0[1]);
context.lineTo(p2[0], p2[1]);
context.clip();
context.transform(