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Fix defining Mask for grayscale transparent PNG files

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Luiz Américo 2018-12-22 22:21:42 -03:00
parent eb60ed1efd
commit faad6e82db
1 changed files with 2 additions and 2 deletions
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4
lib/image/png.js
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@ -49,10 +49,10 @@ class PNGImage {
// For PNG color types 0, 2 and 3, the transparency data is stored in
// a dedicated PNG chunk.
if (this.image.transparency.grayscale) {
if (this.image.transparency.grayscale != null) {
// Use Color Key Masking (spec section 4.8.5)
// An array with N elements, where N is two times the number of color components.
const val = this.image.transparency.greyscale;
const val = this.image.transparency.grayscale;
return this.obj.data['Mask'] = [val, val];
} else if (this.image.transparency.rgb) {