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Add viewportToDrawerRectangle to Drawer

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This commit is contained in:
Philip Giuliani 2015-04-09 19:57:28 +02:00
parent 36597d5072
commit 1a230d8b9f
1 changed files with 16 additions and 0 deletions
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16
src/drawer.js
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@ -232,6 +232,22 @@ $.Drawer.prototype = /** @lends OpenSeadragon.Drawer.prototype */{
}
},
/**
* Translates from OpenSeadragon viewer rectangle to drawer rectangle.
* @param {OpenSeadragon.Rect} rectangle - The rectangle in viewport coordinate system.
*/
viewportToDrawerRectangle: function(rectangle) {
var topLeft = this.viewport.pixelFromPoint(rectangle.getTopLeft(), true);
var size = this.viewport.deltaPixelsFromPoints(rectangle.getSize(), true);
return new $.Rect(
topLeft.x * $.pixelDensityRatio,
topLeft.y * $.pixelDensityRatio,
size.x * $.pixelDensityRatio,
size.y * $.pixelDensityRatio
);
},
/**
* Draws the given tile.
* @param {OpenSeadragon.Tile} tile - The tile to draw.