| 2010-12-13 09:47:21 |
fabb |
bug |
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added bug |
| 2010-12-13 09:48:19 |
fabb |
description |
Inkscape does not allow to draw paths consisting of only one point at all. Also such a path will be cropped from an opened svg.
This makes sense when stroke-linecap="round" (see spec below).
http://launchpadlibrarian.net/10577751/roundbug1.svg should be rendered as two black circles. The right circle still isn't shown or loaded into Inkscape. It displays correctly in Firefox 4.0b7.
From the Spec of SVG 1.1 (http://www.w3.org/TR/SVG11/painting.html#StrokeProperties):
A subpath (see Paths) consisting of a single moveto shall not be stroked. Any zero length subpath shall not be stroked if the 'stroke-linecap’ property has a value of butt but shall be stroked if the ‘stroke-linecap’ property has a value of round or square, producing respectively a circle or a square centered at the given point. Examples of zero length subpaths include 'M 10,10 L 10,10', 'M 20,20 h 0', 'M 30,30 z' and 'M 40,40 c 0,0 0,0 0,0'.
And from the Implementation Notes in the Spec of SVG 1.1 (http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes°):
If ‘stroke-linecap’ is set to butt and the given path segment has zero length, do not draw the linecap for that segment; however, do draw the linecap for zero-length path segments when ‘stroke-linecap’ is set to either round or square. (This allows round and square dots to be drawn on the canvas.) |
Inkscape does not allow to draw paths consisting of only one point at all. Also such a path will be cropped from an opened svg.
Zero-length subpaths make sense when stroke-linecap="round" (see spec below).
http://launchpadlibrarian.net/10577751/roundbug1.svg should be rendered as two black circles. The right circle still isn't shown or loaded into Inkscape. It displays correctly in Firefox 4.0b7.
From the Spec of SVG 1.1 (http://www.w3.org/TR/SVG11/painting.html#StrokeProperties):
A subpath (see Paths) consisting of a single moveto shall not be stroked. Any zero length subpath shall not be stroked if the 'stroke-linecap’ property has a value of butt but shall be stroked if the ‘stroke-linecap’ property has a value of round or square, producing respectively a circle or a square centered at the given point. Examples of zero length subpaths include 'M 10,10 L 10,10', 'M 20,20 h 0', 'M 30,30 z' and 'M 40,40 c 0,0 0,0 0,0'.
And from the Implementation Notes in the Spec of SVG 1.1 (http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes°):
If ‘stroke-linecap’ is set to butt and the given path segment has zero length, do not draw the linecap for that segment; however, do draw the linecap for zero-length path segments when ‘stroke-linecap’ is set to either round or square. (This allows round and square dots to be drawn on the canvas.) |
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| 2010-12-13 10:53:49 |
su_v |
description |
Inkscape does not allow to draw paths consisting of only one point at all. Also such a path will be cropped from an opened svg.
Zero-length subpaths make sense when stroke-linecap="round" (see spec below).
http://launchpadlibrarian.net/10577751/roundbug1.svg should be rendered as two black circles. The right circle still isn't shown or loaded into Inkscape. It displays correctly in Firefox 4.0b7.
From the Spec of SVG 1.1 (http://www.w3.org/TR/SVG11/painting.html#StrokeProperties):
A subpath (see Paths) consisting of a single moveto shall not be stroked. Any zero length subpath shall not be stroked if the 'stroke-linecap’ property has a value of butt but shall be stroked if the ‘stroke-linecap’ property has a value of round or square, producing respectively a circle or a square centered at the given point. Examples of zero length subpaths include 'M 10,10 L 10,10', 'M 20,20 h 0', 'M 30,30 z' and 'M 40,40 c 0,0 0,0 0,0'.
And from the Implementation Notes in the Spec of SVG 1.1 (http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes°):
If ‘stroke-linecap’ is set to butt and the given path segment has zero length, do not draw the linecap for that segment; however, do draw the linecap for zero-length path segments when ‘stroke-linecap’ is set to either round or square. (This allows round and square dots to be drawn on the canvas.) |
Inkscape does not allow to draw paths consisting of only one point at all. Also such a path will be cropped from an opened svg.
Zero-length subpaths make sense when stroke-linecap="round" (see spec below).
http://launchpadlibrarian.net/10577751/roundbug1.svg [1] should be rendered as two black circles. The right circle still isn't shown or loaded into Inkscape. It displays correctly in Firefox 4.0b7.
From the Spec of SVG 1.1 (http://www.w3.org/TR/SVG11/painting.html#StrokeProperties):
A subpath (see Paths) consisting of a single moveto shall not be stroked. Any zero length subpath shall not be stroked if the 'stroke-linecap’ property has a value of butt but shall be stroked if the ‘stroke-linecap’ property has a value of round or square, producing respectively a circle or a square centered at the given point. Examples of zero length subpaths include 'M 10,10 L 10,10', 'M 20,20 h 0', 'M 30,30 z' and 'M 40,40 c 0,0 0,0 0,0'.
And from the Implementation Notes in the Spec of SVG 1.1 (http://www.w3.org/TR/SVG11/implnote.html#PathElementImplementationNotes°):
If ‘stroke-linecap’ is set to butt and the given path segment has zero length, do not draw the linecap for that segment; however, do draw the linecap for zero-length path segments when ‘stroke-linecap’ is set to either round or square. (This allows round and square dots to be drawn on the canvas.)
[1] related reports (ATM closed as 'Fix released' and 'Invalid'):
Bug #166298 “zero-length subpaths with round linecaps are not rendered”
Bug #166306 “Closepaths are bad implemented”
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| 2010-12-13 11:04:31 |
su_v |
attachment added |
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689562-roundbug1-batik1.7-osx.png https://bugs.launchpad.net/inkscape/+bug/689562/+attachment/1764588/+files/689562-roundbug1-batik1.7-osx.png |
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