Javascript 对于iOS，将画布图像转换为toDataURL（）时未出现过滤效果_Javascript_Ios_Image_Filter_Fabricjs

Javascript 对于iOS，将画布图像转换为toDataURL（）时未出现过滤效果

javascript ios image filter

Javascript 对于iOS，将画布图像转换为toDataURL（）时未出现过滤效果,javascript,ios,image,filter,fabricjs,Javascript,Ios,Image,Filter,Fabricjs,我想要在转换为base64图像时图像的过滤效果 $scope.maskCanvas = new fabric.Canvas('viewport'); $scope.maskctx = $scope.maskCanvas.getContext("2d"); $scope.maskctx.filter = 'contrast(200%)'; console.log($scope.maskCanvas.toDataURL); console.log($scope.maskc

我想要在转换为base64图像时图像的过滤效果

$scope.maskCanvas = new fabric.Canvas('viewport');          
$scope.maskctx = $scope.maskCanvas.getContext("2d");  
$scope.maskctx.filter = 'contrast(200%)';  
console.log($scope.maskCanvas.toDataURL);
console.log($scope.maskctx.toDataURL);

对于未在画布上反射的iOS筛选器