diff --git a/src/tiledimage.js b/src/tiledimage.js index 248f0ece..9d4db782 100644 --- a/src/tiledimage.js +++ b/src/tiledimage.js @@ -287,6 +287,26 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag return this.getBounds(); }, + /** + * Get the bounds of the displayed part of the tiled image. + * @param {Boolean} [current=false] Pass true for the current location, + * false for the target location. + * @returns {$.Rect} The clipped bounds in viewport coordinates. + */ + getClippedBounds: function(current) { + var bounds = this.getBounds(current); + if (this._clip) { + var ratio = this._worldWidthCurrent / this.source.dimensions.x; + var clip = this._clip.times(ratio); + bounds = new $.Rect( + bounds.x + clip.x, + bounds.y + clip.y, + clip.width, + clip.height); + } + return bounds; + }, + /** * @returns {OpenSeadragon.Point} This TiledImage's content size, in original pixels. */ diff --git a/src/viewport.js b/src/viewport.js index 63b4dcaf..6f418f13 100644 --- a/src/viewport.js +++ b/src/viewport.js @@ -1085,8 +1085,18 @@ $.Viewport.prototype = { return this.viewportToImageCoordinates(viewerX.x, viewerX.y); } - if (this.viewer && this.viewer.world.getItemCount() > 1) { - $.console.error('[Viewport.viewportToImageCoordinates] is not accurate with multi-image; use TiledImage.viewportToImageCoordinates instead.'); + if (this.viewer) { + var count = this.viewer.world.getItemCount(); + if (count > 1) { + $.console.error('[Viewport.viewportToImageCoordinates] is not accurate ' + + 'with multi-image; use TiledImage.viewportToImageCoordinates instead.'); + } else if (count === 1) { + // It is better to use TiledImage.viewportToImageCoordinates + // because this._contentBoundsNoRotate can not be relied on + // with clipping. + var item = this.viewer.world.getItemAt(0); + return item.viewportToImageCoordinates(viewerX, viewerY, true); + } } return this._viewportToImageDelta( @@ -1119,8 +1129,18 @@ $.Viewport.prototype = { return this.imageToViewportCoordinates(imageX.x, imageX.y); } - if (this.viewer && this.viewer.world.getItemCount() > 1) { - $.console.error('[Viewport.imageToViewportCoordinates] is not accurate with multi-image; use TiledImage.imageToViewportCoordinates instead.'); + if (this.viewer) { + var count = this.viewer.world.getItemCount(); + if (count > 1) { + $.console.error('[Viewport.imageToViewportCoordinates] is not accurate ' + + 'with multi-image; use TiledImage.imageToViewportCoordinates instead.'); + } else if (count === 1) { + // It is better to use TiledImage.viewportToImageCoordinates + // because this._contentBoundsNoRotate can not be relied on + // with clipping. + var item = this.viewer.world.getItemAt(0); + return item.imageToViewportCoordinates(imageX, imageY, true); + } } var point = this._imageToViewportDelta(imageX, imageY); @@ -1150,6 +1170,21 @@ $.Viewport.prototype = { rect = new $.Rect(imageX, imageY, pixelWidth, pixelHeight); } + if (this.viewer) { + var count = this.viewer.world.getItemCount(); + if (count > 1) { + $.console.error('[Viewport.imageToViewportRectangle] is not accurate ' + + 'with multi-image; use TiledImage.imageToViewportRectangle instead.'); + } else if (count === 1) { + // It is better to use TiledImage.imageToViewportRectangle + // because this._contentBoundsNoRotate can not be relied on + // with clipping. + var item = this.viewer.world.getItemAt(0); + return item.imageToViewportRectangle( + imageX, imageY, pixelWidth, pixelHeight, true); + } + } + var coordA = this.imageToViewportCoordinates(rect.x, rect.y); var coordB = this._imageToViewportDelta(rect.width, rect.height); return new $.Rect( @@ -1183,6 +1218,21 @@ $.Viewport.prototype = { rect = new $.Rect(viewerX, viewerY, pointWidth, pointHeight); } + if (this.viewer) { + var count = this.viewer.world.getItemCount(); + if (count > 1) { + $.console.error('[Viewport.viewportToImageRectangle] is not accurate ' + + 'with multi-image; use TiledImage.viewportToImageRectangle instead.'); + } else if (count === 1) { + // It is better to use TiledImage.viewportToImageCoordinates + // because this._contentBoundsNoRotate can not be relied on + // with clipping. + var item = this.viewer.world.getItemAt(0); + return item.viewportToImageRectangle( + viewerX, viewerY, pointWidth, pointHeight, true); + } + } + var coordA = this.viewportToImageCoordinates(rect.x, rect.y); var coordB = this._viewportToImageDelta(rect.width, rect.height); return new $.Rect( @@ -1296,9 +1346,19 @@ $.Viewport.prototype = { * target zoom. * @returns {Number} imageZoom The image zoom */ - viewportToImageZoom: function( viewportZoom ) { - if (this.viewer && this.viewer.world.getItemCount() > 1) { - $.console.error('[Viewport.viewportToImageZoom] is not accurate with multi-image.'); + viewportToImageZoom: function(viewportZoom) { + if (this.viewer) { + var count = this.viewer.world.getItemCount(); + if (count > 1) { + $.console.error('[Viewport.viewportToImageZoom] is not ' + + 'accurate with multi-image.'); + } else if (count === 1) { + // It is better to use TiledImage.viewportToImageZoom + // because this._contentBoundsNoRotate can not be relied on + // with clipping. + var item = this.viewer.world.getItemAt(0); + return item.viewportToImageZoom(viewportZoom); + } } var imageWidth = this._contentSizeNoRotate.x; @@ -1320,9 +1380,19 @@ $.Viewport.prototype = { * target zoom. * @returns {Number} viewportZoom The viewport zoom */ - imageToViewportZoom: function( imageZoom ) { - if (this.viewer && this.viewer.world.getItemCount() > 1) { - $.console.error('[Viewport.imageToViewportZoom] is not accurate with multi-image.'); + imageToViewportZoom: function(imageZoom) { + if (this.viewer) { + var count = this.viewer.world.getItemCount(); + if (count > 1) { + $.console.error('[Viewport.imageToViewportZoom] is not accurate ' + + 'with multi-image.'); + } else if (count === 1) { + // It is better to use TiledImage.imageToViewportZoom + // because this._contentBoundsNoRotate can not be relied on + // with clipping. + var item = this.viewer.world.getItemAt(0); + return item.imageToViewportZoom(imageZoom); + } } var imageWidth = this._contentSizeNoRotate.x; diff --git a/src/world.js b/src/world.js index 5597f0f8..07e99b81 100644 --- a/src/world.js +++ b/src/world.js @@ -375,34 +375,40 @@ $.extend( $.World.prototype, $.EventSource.prototype, /** @lends OpenSeadragon.W var oldContentSize = this._contentSize ? this._contentSize.clone() : null; var oldContentFactor = this._contentFactor || 0; - if ( !this._items.length ) { + if (!this._items.length) { this._homeBounds = new $.Rect(0, 0, 1, 1); this._contentSize = new $.Point(1, 1); this._contentFactor = 1; } else { - var bounds = this._items[0].getBounds(); - this._contentFactor = this._items[0].getContentSize().x / bounds.width; - var left = bounds.x; - var top = bounds.y; - var right = bounds.x + bounds.width; - var bottom = bounds.y + bounds.height; - var box; - for ( var i = 1; i < this._items.length; i++ ) { - box = this._items[i].getBounds(); - this._contentFactor = Math.max(this._contentFactor, this._items[i].getContentSize().x / box.width); - left = Math.min( left, box.x ); - top = Math.min( top, box.y ); - right = Math.max( right, box.x + box.width ); - bottom = Math.max( bottom, box.y + box.height ); + var item = this._items[0]; + var bounds = item.getBounds(); + this._contentFactor = item.getContentSize().x / bounds.width; + var clippedBounds = item.getClippedBounds(); + var left = clippedBounds.x; + var top = clippedBounds.y; + var right = clippedBounds.x + clippedBounds.width; + var bottom = clippedBounds.y + clippedBounds.height; + for (var i = 1; i < this._items.length; i++) { + item = this._items[i]; + bounds = item.getBounds(); + this._contentFactor = Math.max(this._contentFactor, + item.getContentSize().x / bounds.width); + clippedBounds = item.getClippedBounds(); + left = Math.min(left, clippedBounds.x); + top = Math.min(top, clippedBounds.y); + right = Math.max(right, clippedBounds.x + clippedBounds.width); + bottom = Math.max(bottom, clippedBounds.y + clippedBounds.height); } - this._homeBounds = new $.Rect( left, top, right - left, bottom - top ); - this._contentSize = new $.Point(this._homeBounds.width * this._contentFactor, + this._homeBounds = new $.Rect(left, top, right - left, bottom - top); + this._contentSize = new $.Point( + this._homeBounds.width * this._contentFactor, this._homeBounds.height * this._contentFactor); } - if (this._contentFactor !== oldContentFactor || !this._homeBounds.equals(oldHomeBounds) || - !this._contentSize.equals(oldContentSize)) { + if (this._contentFactor !== oldContentFactor || + !this._homeBounds.equals(oldHomeBounds) || + !this._contentSize.equals(oldContentSize)) { /** * Raised when the home bounds or content factor change. * @event metrics-change diff --git a/test/modules/tiledimage.js b/test/modules/tiledimage.js index f281d076..405f0dfc 100644 --- a/test/modules/tiledimage.js +++ b/test/modules/tiledimage.js @@ -206,9 +206,8 @@ propEqual(image.getClip(), clip, 'clip is set correctly'); Util.spyOnce(viewer.drawer, 'setClip', function(rect) { - ok(true, 'drawer.setClip is called'); - var pixelRatio = viewer.viewport.getContainerSize().x / image.getContentSize().x; - var canvasClip = clip.times(pixelRatio * OpenSeadragon.pixelDensityRatio); + var homeBounds = viewer.viewport.getHomeBounds(); + var canvasClip = viewer.viewport.viewportToViewerElementRectangle(homeBounds); propEqual(rect, canvasClip, 'clipping to correct rect'); start(); });