How to give effect in camanJs canvas with dynamic image?

I am developing a middle stack application.
I am stuck in a photo editor.
I am using " Camanjs " to effect a photo and edit it in angularjs 1. It will work very well with the first image for the slider, but if I choose any other image shape slider after editing the first image then it will display the old image.

my file (directive in angularjs)

.directive('hzPhotoEditor', ['$timeout', function($timeout) {
    return {
        restrict: "E",
        link: function(scope, elem, attrs) {
            var imgCanvas, $save;

            //init photo when click on real photo
            scope.$on("fillCanvas", function(event, data) {
                console.log("fill canvas called");
                console.log(data.photo);
                scope.fillCanvas(data);
            });

            scope.fillCanvas = function(data) {
                var hzMIW = 0,
                    hzMIH = 0,
                    hzImgH = 0,
                    hzImgW = 0,
                    path = '',
                    c, c1, ctx, ctx1;

                angular.element(".hz-photo-editor-wrapper").attr("style", angular.element(".hz-modal-wrapper").attr("style"));
                angular.element(".hz-photo-editor-wrapper .hz-left").attr("style", angular.element(".hz-modal-wrapper .hz-left").attr("style"));
                angular.element(".hz-photo-editor-wrapper .hz-modal-image-wrapper").attr("style", angular.element(".hz-modal-wrapper .hz-modal-image-wrapper").attr("style"));
                angular.element(".hz-photo-editor-wrapper .hz-modal-image").attr("style", angular.element(".hz-modal-wrapper .hz-modal-image").attr("style"));
                angular.element(".hz-photo-editor-wrapper .hz-photo-editor-img").attr("height", angular.element(".hz-modal-slider-image").height());
                angular.element(".hz-photo-editor-wrapper .hz-photo-editor-img").attr("width", angular.element(".hz-modal-slider-image").width());
                hzMIW = angular.element(".hz-modal-wrapper .hz-modal-image").css("width").replace("px", "");
                hzMIH = angular.element(".hz-modal-wrapper .hz-modal-image").css("height").replace("px", "");
                hzImgH = angular.element(".hz-modal-wrapper .hz-modal-image img").css('height').replace("px", "");
                hzImgW = angular.element(".hz-modal-wrapper .hz-modal-image img").css('width').replace("px", "");


                path = '/media/site/photo/' + data.photo.photo_name;

                c = document.getElementById('photoEditorCanvas');
                c.width = hzImgW;
                c.height = hzImgH;

                ctx = c.getContext('2d');
                imgCanvas = new Image();
                imgCanvas.src = path;
                console.log("imgCanvas.src");
                console.log(imgCanvas.src);
                if (imgCanvas !== imgCanvas) {
                    console.log("canvas is load.....");
                }

                angular.element('input[type=range]').val(0);

                imgCanvas.addEventListener('load', function() {
                    /*ctx.clearRect(0, 0, 0, 0);*/
                    console.log(imgCanvas);
                    ctx.drawImage(imgCanvas, 0, 0, hzImgW, hzImgH);
                }, false);

            };

            //give effect by slider like hue, contrast, sepia
            scope.applyImageParameters = function() {
                var hue, cntrst, vibr, sep;
                hue = parseInt(angular.element('#hue').val());
                cntrst = parseInt(angular.element('#contrast').val());
                vibr = parseInt(angular.element('#vibrance').val());
                sep = parseInt(angular.element('#sepia').val());

                Caman('#photoEditorCanvas', imgCanvas, function() {
                    this.revert(false);
                    //this.reloadCanvasData();
                    this.hue(hue).contrast(cntrst).vibrance(vibr).sepia(sep).render();

                });
            };

            angular.element("input[type=range]").change("mouseup", function(e) {
                scope.applyImageParameters();
                console.log("event type: " + e.type);
                var min = e.target.min,
                    max = e.target.max,
                    val = e.target.value;
                angular.element(e.target).css({
                    'backgroundSize': (val - min) * 100 / (max - min) + '% 100%'
                });
                //scope.reloadCanvasData();

            });
        }
    };
}])

      

-> if I comment "this.revert (false)"; line and uncomment "this.reloadCanvasData ();" line form "scope.applyImageParameters" then it works very well, but it won't work with shade 0, contrast 0, etc.

-> if i comment out "this.reloadCanvasData ();" line and uncomment "this.revert (false);" line form "scope.applyImageParameters" then the effect works well, but it displays the old image of the non-current image with the effect

Image has been added to two screens for more details.

First edited image after effect

Second image after effect

Can anyone help me solve this problem?

+3


source to share


1 answer


You have to delete the canvas and create the canvas again.



.directive('hzPhotoEditor', ['$timeout', function($timeout) {
return {
    restrict: "E",
    link: function(scope, elem, attrs) {
        var imgCanvas, $save;

        //init photo when click on real photo
        scope.$on("fillCanvas", function(event, data) {
            console.log("fill canvas called");
            console.log(data.photo);
            scope.fillCanvas(data);
        });

        scope.fillCanvas = function(data) {
            var hzMIW = 0,
                hzMIH = 0,
                hzImgH = 0,
                hzImgW = 0,
                path = '',
                c, c1, ctx, ctx1;

            angular.element(".hz-photo-editor-wrapper").attr("style", angular.element(".hz-modal-wrapper").attr("style"));
            angular.element(".hz-photo-editor-wrapper .hz-left").attr("style", angular.element(".hz-modal-wrapper .hz-left").attr("style"));
            angular.element(".hz-photo-editor-wrapper .hz-modal-image-wrapper").attr("style", angular.element(".hz-modal-wrapper .hz-modal-image-wrapper").attr("style"));
            angular.element(".hz-photo-editor-wrapper .hz-modal-image").attr("style", angular.element(".hz-modal-wrapper .hz-modal-image").attr("style"));
            angular.element(".hz-photo-editor-wrapper .hz-photo-editor-img").attr("height", angular.element(".hz-modal-slider-image").height());
            angular.element(".hz-photo-editor-wrapper .hz-photo-editor-img").attr("width", angular.element(".hz-modal-slider-image").width());
            hzMIW = angular.element(".hz-modal-wrapper .hz-modal-image").css("width").replace("px", "");
            hzMIH = angular.element(".hz-modal-wrapper .hz-modal-image").css("height").replace("px", "");
            hzImgH = angular.element(".hz-modal-wrapper .hz-modal-image img").css('height').replace("px", "");
            hzImgW = angular.element(".hz-modal-wrapper .hz-modal-image img").css('width').replace("px", "");


            $(".hz-modal-image").children("canvas").remove();
            var canvas_ = $("<canvas></canvas>").attr({id: 'photoEditorCanvas'});
            $(".hz-modal-image").append(canvas_);

            c = document.getElementById('photoEditorCanvas');
            c.width = hzImgW;
            c.height = hzImgH;

            ctx = c.getContext('2d');
            imgCanvas = new Image();
            imgCanvas.src = path;
            console.log("imgCanvas.src");
            console.log(imgCanvas.src);
            if (imgCanvas !== imgCanvas) {
                console.log("canvas is load.....");
            }

            angular.element('input[type=range]').val(0);

            imgCanvas.addEventListener('load', function() {
                /*ctx.clearRect(0, 0, 0, 0);*/
                console.log(imgCanvas);
                ctx.drawImage(imgCanvas, 0, 0, hzImgW, hzImgH);
            }, false);

        };

        //give effect by slider like hue, contrast, sepia
        scope.applyImageParameters = function() {
            var hue, cntrst, vibr, sep;
            hue = parseInt(angular.element('#hue').val());
            cntrst = parseInt(angular.element('#contrast').val());
            vibr = parseInt(angular.element('#vibrance').val());
            sep = parseInt(angular.element('#sepia').val());

            Caman('#photoEditorCanvas', imgCanvas, function() {
                this.revert(false);
                //this.reloadCanvasData();
                this.hue(hue).contrast(cntrst).vibrance(vibr).sepia(sep).render();

            });
        };

        angular.element("input[type=range]").change("mouseup", function(e) {
            scope.applyImageParameters();
            console.log("event type: " + e.type);
            var min = e.target.min,
                max = e.target.max,
                val = e.target.value;
            angular.element(e.target).css({
                'backgroundSize': (val - min) * 100 / (max - min) + '% 100%'
            });
            //scope.reloadCanvasData();

        });
    }
};
}])

      

+2


source







All Articles