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fix #2517

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Tom 2024-04-27 16:38:30 -04:00
parent 7ce5499868
commit f2c8db5db0
1 changed files with 6 additions and 3 deletions
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9
src/canvasdrawer.js
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@ -80,8 +80,6 @@ class CanvasDrawer extends OpenSeadragon.DrawerBase{
// Canvas default is "true", so this will only be changed if user specifies "false" in the options or via setImageSmoothinEnabled.
this._imageSmoothingEnabled = true;
this._viewportFlipped = false;
// Since the tile-drawn and tile-drawing events are fired by this drawer, make sure handlers can be added for them
this.viewer.allowEventHandler("tile-drawn");
this.viewer.allowEventHandler("tile-drawing");
@ -118,8 +116,8 @@ class CanvasDrawer extends OpenSeadragon.DrawerBase{
this._prepareNewFrame(); // prepare to draw a new frame
if(this.viewer.viewport.getFlip() !== this._viewportFlipped){
this._flip();
this._viewportFlipped = !this._viewportFlipped;
}
console.log('draw', this._viewportFlipped);
for(const tiledImage of tiledImages){
if (tiledImage.opacity !== 0) {
this._drawTiles(tiledImage);
@ -189,6 +187,10 @@ class CanvasDrawer extends OpenSeadragon.DrawerBase{
context.restore();
}
get _viewportFlipped(){
return this.context.getTransform().a < 0;
}
/**
* Fires the tile-drawing event.
* @private
@ -961,6 +963,7 @@ class CanvasDrawer extends OpenSeadragon.DrawerBase{
context.translate(point.x, 0);
context.scale(-1, 1);
context.translate(-point.x, 0);
console.log('flipped');
}
// private