Merge branch 'collections' into m2

Fixed Conflicts:
	changelog.txt

changelog.txt

@@ -47,8 +47,11 @@ OPENSEADRAGON CHANGELOG
 * Added viewport-change event for after the viewport changes but before it's drawn
 * A spring's current value is now updated immediately on reset (#524)
 * Fixed an error in fitBounds that occurred sometimes with immediately = true
+* Added support for HDPI (retina) displays (#583)
 
-1.2.1: (in progress)
+1.2.2: (in progress)
+
+1.2.1:
 
 * Added preserveOverlays option (#561)
 * Fixed: DZI tilesource was broken on IE8/IE9 (#563)

package.json

@@ -1,6 +1,6 @@
 {
   "name": "OpenSeadragon",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "Provides a smooth, zoomable user interface for HTML/Javascript.",
   "devDependencies": {
     "grunt": "^0.4.5",

src/drawer.js

@@ -108,6 +108,13 @@ $.Drawer = function( options ) {
     // Note that this means overlays you want to be rtl need to be explicitly set to rtl.
     this.container.dir = 'ltr';
 
+    // check canvas available width and height, set canvas width and height such that the canvas backing store is set to the proper pixel density
+    if (this.useCanvas) {
+        var viewportSize = this._calculateCanvasSize();
+        this.canvas.width = viewportSize.x;
+        this.canvas.height = viewportSize.y;
+    }
+
     this.canvas.style.width     = "100%";
     this.canvas.style.height    = "100%";
     this.canvas.style.position  = "absolute";
@@ -215,7 +222,7 @@ $.Drawer.prototype = /** @lends OpenSeadragon.Drawer.prototype */{
     clear: function() {
         this.canvas.innerHTML = "";
         if ( this.useCanvas ) {
-            var viewportSize = this.viewport.getContainerSize();
+            var viewportSize = this._calculateCanvasSize();
             if( this.canvas.width != viewportSize.x ||
                 this.canvas.height != viewportSize.y ) {
                 this.canvas.width = viewportSize.x;
@@ -255,22 +262,24 @@ $.Drawer.prototype = /** @lends OpenSeadragon.Drawer.prototype */{
     drawDebugInfo: function( tile, count, i ){
         if ( this.useCanvas ) {
             this.context.save();
-            this.context.lineWidth = 2;
+            this.context.lineWidth = 2 * $.pixelDensityRatio;
-            this.context.font = 'small-caps bold 13px ariel';
+            this.context.font = 'small-caps bold ' + (13 * $.pixelDensityRatio) + 'px arial';
             this.context.strokeStyle = this.debugGridColor;
             this.context.fillStyle = this.debugGridColor;
 
-            this._offsetForRotation( tile, this.canvas, this.context, this.viewport.degrees );
+            if ( this.viewport.degrees !== 0 ) {
+                this._offsetForRotation( tile, this.canvas, this.context, this.viewport.degrees );
+            }
 
             this.context.strokeRect(
-                tile.position.x,
+                tile.position.x * $.pixelDensityRatio,
-                tile.position.y,
+                tile.position.y * $.pixelDensityRatio,
-                tile.size.x,
+                tile.size.x * $.pixelDensityRatio,
-                tile.size.y
+                tile.size.y * $.pixelDensityRatio
             );
 
-            var tileCenterX = tile.position.x + (tile.size.x / 2);
+            var tileCenterX = (tile.position.x + (tile.size.x / 2)) * $.pixelDensityRatio;
-            var tileCenterY = tile.position.y + (tile.size.y / 2);
+            var tileCenterY = (tile.position.y + (tile.size.y / 2)) * $.pixelDensityRatio;
 
             // Rotate the text the right way around.
             this.context.translate( tileCenterX, tileCenterY );
@@ -280,46 +289,49 @@ $.Drawer.prototype = /** @lends OpenSeadragon.Drawer.prototype */{
             if( tile.x === 0 && tile.y === 0 ){
                 this.context.fillText(
                     "Zoom: " + this.viewport.getZoom(),
-                    tile.position.x,
+                    tile.position.x * $.pixelDensityRatio,
-                    tile.position.y - 30
+                    (tile.position.y - 30) * $.pixelDensityRatio
                 );
                 this.context.fillText(
                     "Pan: " + this.viewport.getBounds().toString(),
-                    tile.position.x,
+                    tile.position.x * $.pixelDensityRatio,
-                    tile.position.y - 20
+                    (tile.position.y - 20) * $.pixelDensityRatio
                 );
             }
             this.context.fillText(
                 "Level: " + tile.level,
-                tile.position.x + 10,
+                (tile.position.x + 10) * $.pixelDensityRatio,
-                tile.position.y + 20
+                (tile.position.y + 20) * $.pixelDensityRatio
             );
             this.context.fillText(
                 "Column: " + tile.x,
-                tile.position.x + 10,
+                (tile.position.x + 10) * $.pixelDensityRatio,
-                tile.position.y + 30
+                (tile.position.y + 30) * $.pixelDensityRatio
             );
             this.context.fillText(
                 "Row: " + tile.y,
-                tile.position.x + 10,
+                (tile.position.x + 10) * $.pixelDensityRatio,
-                tile.position.y + 40
+                (tile.position.y + 40) * $.pixelDensityRatio
             );
             this.context.fillText(
                 "Order: " + i + " of " + count,
-                tile.position.x + 10,
+                (tile.position.x + 10) * $.pixelDensityRatio,
-                tile.position.y + 50
+                (tile.position.y + 50) * $.pixelDensityRatio
             );
             this.context.fillText(
                 "Size: " + tile.size.toString(),
-                tile.position.x + 10,
+                (tile.position.x + 10) * $.pixelDensityRatio,
-                tile.position.y + 60
+                (tile.position.y + 60) * $.pixelDensityRatio
             );
             this.context.fillText(
                 "Position: " + tile.position.toString(),
-                tile.position.x + 10,
+                (tile.position.x + 10) * $.pixelDensityRatio,
-                tile.position.y + 70
+                (tile.position.y + 70) * $.pixelDensityRatio
             );
-            this._restoreRotationChanges( tile, this.canvas, this.context );
+
+            if ( this.viewport.degrees !== 0 ) {
+                this._restoreRotationChanges( tile, this.canvas, this.context );
+            }
             this.context.restore();
         }
     },
@@ -328,15 +340,15 @@ $.Drawer.prototype = /** @lends OpenSeadragon.Drawer.prototype */{
     debugRect: function(rect) {
         if ( this.useCanvas ) {
             this.context.save();
-            this.context.lineWidth = 2;
+            this.context.lineWidth = 2 * $.pixelDensityRatio;
             this.context.strokeStyle = this.debugGridColor;
             this.context.fillStyle = this.debugGridColor;
 
             this.context.strokeRect(
-                rect.x,
+                rect.x * $.pixelDensityRatio,
-                rect.y,
+                rect.y * $.pixelDensityRatio,
-                rect.width,
+                rect.width * $.pixelDensityRatio,
-                rect.height
+                rect.height * $.pixelDensityRatio
             );
 
             this.context.restore();
@@ -369,6 +381,16 @@ $.Drawer.prototype = /** @lends OpenSeadragon.Drawer.prototype */{
         tile.position.y = py;
 
         this.context.restore();
+    },
+
+    // private
+    _calculateCanvasSize: function() {
+        var pixelDensityRatio = $.pixelDensityRatio;
+        var viewportSize = this.viewport.getContainerSize();
+        return {
+            x: viewportSize.x * pixelDensityRatio,
+            y: viewportSize.y * pixelDensityRatio
+        };
     }
 };
 

src/openseadragon.js

@@ -820,6 +820,25 @@ window.OpenSeadragon = window.OpenSeadragon || function( options ){
                     canvasElement.getContext( '2d' ) );
     }());
 
+    /**
+     * A ratio comparing the device screen's pixel density to the canvas's backing store pixel density. Defaults to 1 if canvas isn't supported by the browser.
+     * @member {Number} pixelDensityRatio
+     * @memberof OpenSeadragon
+     */
+    $.pixelDensityRatio = (function () {
+        if ( $.supportsCanvas ) {
+            var context = document.createElement('canvas').getContext('2d');
+            var devicePixelRatio = window.devicePixelRatio || 1;
+            var backingStoreRatio = context.webkitBackingStorePixelRatio ||
+                                    context.mozBackingStorePixelRatio ||
+                                    context.msBackingStorePixelRatio ||
+                                    context.oBackingStorePixelRatio ||
+                                    context.backingStorePixelRatio || 1;
+            return devicePixelRatio / backingStoreRatio;
+        } else {
+            return 1;
+        }
+    }());
 
 }( OpenSeadragon ));
 

src/tile.js

@@ -268,10 +268,10 @@ $.Tile.prototype = /** @lends OpenSeadragon.Tile.prototype */{
             //clearing only the inside of the rectangle occupied
             //by the png prevents edge flikering
             context.clearRect(
-                position.x+1,
+                (position.x * $.pixelDensityRatio)+1,
-                position.y+1,
+                (position.y * $.pixelDensityRatio)+1,
-                size.x-2,
+                (size.x * $.pixelDensityRatio)-2,
-                size.y-2
+                (size.y * $.pixelDensityRatio)-2
             );
 
         }
@@ -297,10 +297,10 @@ $.Tile.prototype = /** @lends OpenSeadragon.Tile.prototype */{
             0,
             rendered.canvas.width,
             rendered.canvas.height,
-            position.x,
+            position.x * $.pixelDensityRatio,
-            position.y,
+            position.y * $.pixelDensityRatio,
-            size.x,
+            size.x * $.pixelDensityRatio,
-            size.y
+            size.y * $.pixelDensityRatio
         );
     },
 

src/tiledimage.js

@@ -262,7 +262,7 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
 
     // private
     _viewportToImageDelta: function( viewerX, viewerY, current ) {
-        var scale = current ? this._scaleSpring.current.value : this._scaleSpring.target.value;
+        var scale = (current ? this._scaleSpring.current.value : this._scaleSpring.target.value);
         return new $.Point(viewerX * (this.source.dimensions.x / scale),
             viewerY * ((this.source.dimensions.y * this.contentAspectX) / scale));
     },
@@ -294,7 +294,7 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
 
     // private
     _imageToViewportDelta: function( imageX, imageY, current ) {
-        var scale = current ? this._scaleSpring.current.value : this._scaleSpring.target.value;
+        var scale = (current ? this._scaleSpring.current.value : this._scaleSpring.target.value);
         return new $.Point((imageX / this.source.dimensions.x) * scale,
             (imageY / this.source.dimensions.y / this.contentAspectX) * scale);
     },