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Emit 1x1 blank bitmap data instead of full empty canvas

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This fixes the issue where you cannot save blank bitmaps in scratch. We were trying to create PNG files which cannot have 0x0 size.
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Paul Kaplan 2019-12-09 16:03:13 -05:00 committed by GitHub
parent e086c4260e
commit 9491b7eb09
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1 changed files with 6 additions and 5 deletions
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11
src/hocs/update-image-hoc.jsx
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@ -89,15 +89,16 @@ const UpdateImageHOC = function (WrappedComponent) {
}
}
const rect = getHitBounds(plasteredRaster);
const imageData = plasteredRaster.getImageData(rect);
// If the bitmap has a zero width or height, save this information
// since zero isn't a valid value for on imageData objects' widths and heights.
// Use 1x1 instead of 0x0 for getting imageData since paper.js automagically
// returns the full artboard in the case of getImageData(0x0).
// Bitmaps need a non-zero width/height in order to be saved as PNG.
if (rect.width === 0 || rect.height === 0) {
imageData.sourceWidth = rect.width;
imageData.sourceHeight = rect.height;
rect.width = rect.height = 1;
}
const imageData = plasteredRaster.getImageData(rect);
this.props.onUpdateImage(
false /* isVector */,
imageData,