mirror of https://github.com/tuhiproject/tuhi.git
83 lines
2.9 KiB
Python
83 lines
2.9 KiB
Python
#!/usr/bin/env python3
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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from gi.repository import GObject
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import svgwrite
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from svgwrite import mm
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class JsonSvg(GObject.Object):
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def __init__(self, json, orientation, filename, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.json = json
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self.timestamp = json['timestamp']
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self.filename = filename
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self.orientation = orientation.lower()
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self._convert()
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def _convert(self):
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js = self.json
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dimensions = js['dimensions']
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if dimensions == [0, 0]:
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width, height = 100, 100
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else:
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# Original dimensions are too big for SVG Standard
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# so we normalize them
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width, height = dimensions[0] / 1000, dimensions[1] / 1000
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if self.orientation in ['portrait', 'reverse-portrait']:
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size = (height * mm, width * mm)
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else:
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size = (width * mm, height * mm)
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svg = svgwrite.Drawing(filename=self.filename, size=size)
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g = svgwrite.container.Group(id='layer0')
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for stroke_num, s in enumerate(js['strokes']):
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points_with_sk_width = []
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for p in s['points']:
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x, y = p['position']
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# Normalize coordinates too
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x, y = x / 1000, y / 1000
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if self.orientation == 'reverse-portrait':
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x, y = y, width - x
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elif self.orientation == 'portrait':
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x, y = height - y, x
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elif self.orientation == 'reverse-landscape':
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x, y = width - x, height - y
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# Pressure normalized range is [0, 0xffff]
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delta = (p['pressure'] - 0x8000) / 0x8000
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stroke_width = 0.4 + 0.20 * delta
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points_with_sk_width.append((x, y, stroke_width))
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lines = svgwrite.container.Group(id=f'strokes_{stroke_num}', stroke='black')
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for i, (x, y, stroke_width) in enumerate(points_with_sk_width):
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if i != 0:
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xp, yp, stroke_width_p = points_with_sk_width[i - 1]
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lines.add(
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svg.line(
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start=(xp * mm, yp * mm),
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end=(x * mm, y * mm),
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stroke_width=stroke_width,
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style='fill:none'
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)
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)
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g.add(lines)
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svg.add(g)
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svg.save()
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