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fix clip behavior with webgl drawer

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This commit is contained in:
Tom 2024-02-21 17:49:46 -05:00
parent 59645e3a0d
commit a0bcbc4d21
1 changed files with 18 additions and 4 deletions
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22
src/webgldrawer.js
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@ -920,9 +920,23 @@
this._clippingContext.save();
if(item._clip){
var box = item.imageToViewportRectangle(item._clip, true);
var rect = this.viewportToDrawerRectangle(box);
this._setClip(rect);
const polygon = [
{x: item._clip.x, y: item._clip.y},
{x: item._clip.x + item._clip.width, y: item._clip.y},
{x: item._clip.x + item._clip.width, y: item._clip.y + item._clip.height},
{x: item._clip.x, y: item._clip.y + item._clip.height},
];
let clipPoints = polygon.map(coord => {
let point = item.imageToViewportCoordinates(coord.x, coord.y, true)
.rotate(this.viewer.viewport.getRotation(true), this.viewer.viewport.getCenter(true));
let clipPoint = this.viewportCoordToDrawerCoord(point);
return clipPoint;
});
this._clippingContext.beginPath();
clipPoints.forEach( (coord, i) => {
this._clippingContext[i === 0 ? 'moveTo' : 'lineTo'](coord.x, coord.y);
});
this._clippingContext.clip();
}
if(item._croppingPolygons){
let polygons = item._croppingPolygons.map(polygon => {
@ -934,7 +948,7 @@
});
});
this._clippingContext.beginPath();
polygons.forEach(polygon => {
polygons.forEach((polygon) => {
polygon.forEach( (coord, i) => {
this._clippingContext[i === 0 ? 'moveTo' : 'lineTo'](coord.x, coord.y);
});