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Update comment for the IconImage replaceColor_ method

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This commit is contained in:
Maximilian Krög
2020-03-22 13:29:29 +01:00
parent fbb0364ea5
commit 24f9e1c6ac
1 changed files with 6 additions and 4 deletions
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src/ol/style/IconImage.js
+6 -4
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@@ -217,10 +217,12 @@ class IconImage extends EventTarget {
ctx.drawImage(this.image_, 0, 0); ctx.drawImage(this.image_, 0, 0);
if (this.isTainted_(ctx)) { if (this.isTainted_(ctx)) {
// Internet explorer 11 marks canvas as tainted if the drawn image is a svg. // If reading from the canvas throws a SecurityError the same effect can be
// This makes the getImageData function throw a SecurityError. // achieved with globalCompositeOperation.
// The same effect can be achieved with the globalCompositionOperation but // This could be used as the default, but it is not fully supported by all
// Internet Explorer 11 does not properly support the multiply operation. // browsers. E. g. Internet Explorer 11 does not support the multiply
// operation and the resulting image shape will be completelly filled with
// the provided color.
// So this is only used as a fallback. It is still better than having no icon // So this is only used as a fallback. It is still better than having no icon
// at all. // at all.
const c = this.color_; const c = this.color_;