ol-ext: Canvas filter
ol/filter/CanvasFilter
applies a canvas filter on layer drawing.
See
browser compatibility
or use
color filters
.
Operations:
emboss:
px
erode:
px
blur:
px
brightness:
%
contrast:
%
grayscale:
%
sepia:
%
hueRotate:
invert:
%
saturate:
%
paper:
%