javascript - zoom canvas not working for clip area -


i using following code zoom in , zoom out effect. problem performing clip[suppose clip circle stroke colour] on canvas , doing zoomin. happened elements zoomed, clip area not zoomed. how can make clip area zoom?

clip method ::

canvas.clipto = function(ctx) {                         var shp = new fabric.rect({                             top : top_pos,                             left : left_pos,                             width : c_width,                             height : c_height,                             fill:'',                             stroke : 'red',                             strokewidth : 5                          });                         shp.render(ctx);                     };

zoom method ::

// zoom in     function zoomin() {         // todo limit max canvas zoom in         console.log('zoom in called');         if (zoomeffect == false) {              canvasscale = canvasscale * scale_factor;              canvas.setheight(canvas.getheight() * scale_factor);             canvas.setwidth(canvas.getwidth() * scale_factor);              var objects = canvas.getobjects();             (var in objects) {                 var scalex = objects[i].scalex;                 var scaley = objects[i].scaley;                 var left = objects[i].left;                 var top = objects[i].top;                  var tempscalex = scalex * scale_factor;                 var tempscaley = scaley * scale_factor;                 var templeft = left * scale_factor;                 var temptop = top * scale_factor;                  objects[i].scalex = tempscalex;                 objects[i].scaley = tempscaley;                 objects[i].left = templeft;                 objects[i].top = temptop;                  objects[i].setcoords();             }              canvas.renderall();             zoomeffect = true;         }     }      // zoom out     function zoomout() {         // todo limit max cavas zoom out         console.log('zoom out called');         if (zoomeffect == true) {          canvasscale = canvasscale / scale_factor;          canvas.setheight(canvas.getheight() * (1 / scale_factor));         canvas.setwidth(canvas.getwidth() * (1 / scale_factor));          var objects = canvas.getobjects();         (var in objects) {             var scalex = objects[i].scalex;             var scaley = objects[i].scaley;             var left = objects[i].left;             var top = objects[i].top;              var tempscalex = scalex * (1 / scale_factor);             var tempscaley = scaley * (1 / scale_factor);             var templeft = left * (1 / scale_factor);             var temptop = top * (1 / scale_factor);              objects[i].scalex = tempscalex;             objects[i].scaley = tempscaley;             objects[i].left = templeft;             objects[i].top = temptop;              objects[i].setcoords();         }             }         canvas.renderall();             zoomeffect = false;     }

use canvas.zoomtopoint(point,zoomfactor);


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