scratchfoundation/scratch-paint
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Merge pull request #1079 from fsih/addRotationCenter

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Add default rotation center for bitmap images
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DD Liu 2020-06-01 20:21:12 -04:00 committed by GitHub
commit 0e3b79e143
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2 changed files with 9 additions and 2 deletions
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4
README.md
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@ -96,9 +96,9 @@ SVGs of up to size 480 x 360 will fit into the view window of the paint editor,
`imageFormat`: 'svg', 'png', or 'jpg'. Other formats are currently not supported. `imageFormat`: 'svg', 'png', or 'jpg'. Other formats are currently not supported.
`rotationCenterX`: x coordinate relative to the top left corner of the sprite of the point that should be centered. `rotationCenterX`: x coordinate relative to the top left corner of the sprite of the point that should be centered. If left undefined, image will be horizontally centered.
`rotationCenterY`: y coordinate relative to the top left corner of the sprite of the point that should be centered. `rotationCenterY`: y coordinate relative to the top left corner of the sprite of the point that should be centered. If left undefined, image will be vertcally centered.
`rtl`: True if the paint editor should be laid out right to left (meant for right to left languages) `rtl`: True if the paint editor should be laid out right to left (meant for right to left languages)

7
src/containers/paper-canvas.jsx
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@ -148,6 +148,13 @@ class PaperCanvas extends React.Component {
if (!this.queuedImageToLoad) return; if (!this.queuedImageToLoad) return;
this.queuedImageToLoad = null; this.queuedImageToLoad = null;
if (typeof rotationCenterX === 'undefined') {
rotationCenterX = imgElement.width / 2;
}
if (typeof rotationCenterY === 'undefined') {
rotationCenterY = imgElement.height / 2;
}
getRaster().drawImage( getRaster().drawImage(
imgElement, imgElement,
(ART_BOARD_WIDTH / 2) - rotationCenterX, (ART_BOARD_WIDTH / 2) - rotationCenterX,