getImageWithPerspective method
Implementation
FilterResult? getImageWithPerspective(
List<Point<num>>? points, double scale) {
if (scale <= 0) return null;
var cacheKey = '$scale > $points';
var imageWithPerspective = _perspectiveCache[cacheKey];
if (imageWithPerspective == null) {
var imageScaled = getImageScaled(scale)!;
var imageScaledDim = getImageDimension(imageScaled);
if (imageScaledDim == null ||
imageScaledDim.width == 0 ||
imageScaledDim.height == 0) {
getImageScaled(scale);
}
var perspective = scalePoints(points!, scale);
imageWithPerspective = applyPerspective(imageScaled, perspective);
ImageScaledCache.limitEntries(
_perspectiveCache, _maxPerspectiveCacheEntries - 1);
_perspectiveCache[cacheKey] = imageWithPerspective;
}
return imageWithPerspective;
}