scratchfoundation/paper.js
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Only draw Raster items when they're fully loaded.

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Closes #645.
This commit is contained in:
Jürg Lehni 2015-02-28 18:30:23 +01:00
parent 23ec75f5d2
commit 3b47d7ee89
1 changed files with 11 additions and 4 deletions
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15
src/item/Raster.js
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@ -90,8 +90,10 @@ var Raster = Item.extend(/** @lends Raster# */{
this.setImage(object);
}
}
if (!this._size)
if (!this._size) {
this._size = new Size();
this._loaded = false;
}
},
_equals: function(item) {
@ -225,10 +227,12 @@ var Raster = Item.extend(/** @lends Raster# */{
// A canvas object
this._image = null;
this._canvas = image;
this._loaded = true;
} else {
// A image object
this._image = image;
this._canvas = null;
this._loaded = image && image.complete;
}
// Both canvas and image have width / height attributes. Due to IE,
// naturalWidth / Height needs to be checked for a swell, because it
@ -394,7 +398,8 @@ var Raster = Item.extend(/** @lends Raster# */{
// DOCS: document Raster#getElement
getElement: function() {
return this._canvas || this._image;
// Only return the internal element if the content is actually ready.
return this._canvas || this._loaded && this._image;
}
}, /** @lends Raster# */{
// Explicitly deactivate the creation of beans, as we have functions here
@ -526,8 +531,10 @@ var Raster = Item.extend(/** @lends Raster# */{
path.draw(ctx, new Base({ clip: true, matrices: [matrix] }));
// Now draw the image clipped into it.
this._matrix.applyToContext(ctx);
ctx.drawImage(this.getElement(),
-this._size.width / 2, -this._size.height / 2);
var element = this.getElement(),
size = this._size;
if (element)
ctx.drawImage(element, -size.width / 2, -size.height / 2);
ctx.restore();
// Get pixel data from the context and calculate the average color value
// from it, taking alpha into account.