mirror/openseadragon
1
0
Fork 0
mirror of https://github.com/openseadragon/openseadragon.git synced 2024-11-25 06:36:11 +03:00
Code Issues Projects Releases Wiki Activity

1540 Add support for xy point object and mixed array

Browse Source
This commit is contained in:
Yansong Hong 2020-02-07 16:03:40 -08:00
parent b4bf21cda8
commit 7193f5b445
1 changed files with 42 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

44
src/tiledimage.js
View File

@ -677,14 +677,54 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
/**
* Sets an array of polygons to crop the TiledImage during draw tiles.
* The render function will use the default non-zero winding rule.
* @param Polygons represented in an array of pair array in pixels.
* @param Polygons represented in an array of pair array or point object in pixels.
* Example format: [
* [[197,172],[226,172],[226,198],[197,198]], // First polygon
* [[328,200],[330,199],[332,201],[329,202]] // Second polygon
* [{x: 321, y:201}, {x: 356, y:205}, {x: 341, y:250}] // Third polygon
* ]
* Argument may mix array and point objects.
* Point objects will be convert to array.
*/
setCroppingPolygons: function( polygons ) {
this._croppingPolygons = polygons;
var isXYObject = function(obj) {
return obj instanceof $.Point || (typeof obj.x === 'number' && typeof obj.y === 'number');
};
var isArray = function(obj) {
return Object.prototype.toString.call(obj) === '[object Array]';
};
var isXYPair = function(obj) {
return obj && isArray(obj) && obj.length === 2;
};
var convertXYObjectsToArrayIfNeeded = function(objs) {
return objs.map(function(obj) {
try {
if (isXYObject(obj)) {
return [obj.x, obj.y];
} else if (isXYPair(obj)) {
return obj;
} else {
throw new Error();
}
} catch(e) {
throw new Error('A Provided cropping polygon point is not supported');
}
});
};
try {
if (!isArray(polygons)) {
throw new Error('Provided cropping polygon is not an array');
}
this._croppingPolygons = polygons.map(function(polygon){
return convertXYObjectsToArrayIfNeeded(polygon);
});
} catch (e) {
$.console.error('[TiledImage.setCroppingPolygons] Cropping polygon format not supported');
$.console.error(e);
this._croppingPolygons = null;
}
},
/**