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Merge pull request #1595 from doutsh/pr/imagesmoothing

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[WIP] Fixing "imageSmoothingEnabled" resetting to 'True' (should fix #1593)
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Ian Gilman 2019-02-13 09:17:45 -08:00 committed by GitHub
commit d003aab06f
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1 changed files with 19 additions and 9 deletions
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src/drawer.js
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@ -130,6 +130,10 @@ $.Drawer = function( options ) {
// explicit left-align
this.container.style.textAlign = "left";
this.container.appendChild( this.canvas );
// Image smoothing for canvas rendering (only if canvas is used).
// Canvas default is "true", so this will only be changed if user specified "false".
this._imageSmoothingEnabled = true;
};
/** @lends OpenSeadragon.Drawer.prototype */
@ -254,6 +258,7 @@ $.Drawer.prototype = {
this.sketchCanvas.width = sketchCanvasSize.x;
this.sketchCanvas.height = sketchCanvasSize.y;
}
this._updateImageSmoothingEnabled();
}
this._clear();
}
@ -608,7 +613,6 @@ $.Drawer.prototype = {
}
},
/**
* Turns image smoothing on or off for this viewer. Note: Ignored in some (especially older) browsers that do not support this property.
*
@ -619,16 +623,21 @@ $.Drawer.prototype = {
*/
setImageSmoothingEnabled: function(imageSmoothingEnabled){
if ( this.useCanvas ) {
var context = this.context;
context.mozImageSmoothingEnabled = imageSmoothingEnabled;
context.webkitImageSmoothingEnabled = imageSmoothingEnabled;
context.msImageSmoothingEnabled = imageSmoothingEnabled;
context.imageSmoothingEnabled = imageSmoothingEnabled;
this._imageSmoothingEnabled = imageSmoothingEnabled;
this._updateImageSmoothingEnabled();
this.viewer.forceRedraw();
}
},
// private
_updateImageSmoothingEnabled: function(){
var context = this.context;
context.mozImageSmoothingEnabled = this._imageSmoothingEnabled;
context.webkitImageSmoothingEnabled = this._imageSmoothingEnabled;
context.msImageSmoothingEnabled = this._imageSmoothingEnabled;
context.imageSmoothingEnabled = this._imageSmoothingEnabled;
},
/**
* Get the canvas size
* @param {Boolean} sketch If set to true return the size of the sketch canvas
@ -686,8 +695,9 @@ $.Drawer.prototype = {
var pixelDensityRatio = $.pixelDensityRatio;
var viewportSize = this.viewport.getContainerSize();
return {
x: viewportSize.x * pixelDensityRatio,
y: viewportSize.y * pixelDensityRatio
// canvas width and height are integers
x: Math.round(viewportSize.x * pixelDensityRatio),
y: Math.round(viewportSize.y * pixelDensityRatio)
};
},