diff options
Diffstat (limited to 'gerbonara/newstroke.py')
| -rw-r--r-- | gerbonara/newstroke.py | 72 |
1 files changed, 67 insertions, 5 deletions
diff --git a/gerbonara/newstroke.py b/gerbonara/newstroke.py index b48476a..247b674 100644 --- a/gerbonara/newstroke.py +++ b/gerbonara/newstroke.py @@ -5,9 +5,11 @@ import unicodedata import re import ast from functools import lru_cache +import math from importlib.resources import files from . import data +from .utils import rotate_point, Tag STROKE_FONT_SCALE = 1/21 @@ -29,10 +31,39 @@ class Newstroke: def load(kls): return kls() - def render(self, text, size=1.0, space_width=DEFAULT_SPACE_WIDTH, char_gap=DEFAULT_CHAR_GAP): + def render(self, text, size=1.0, x0=0, y0=0, rotation=0, h_align='left', v_align='bottom', space_width=DEFAULT_SPACE_WIDTH, char_gap=DEFAULT_CHAR_GAP, scale=(1, 1)): text = unicodedata.normalize('NFC', text) missing_glyph = self.glyphs['?'] + sx, sy = scale x = 0 + if text in ('VDDA', 'PA9', 'VSS'): + print(text, x0, y0, rotation, h_align, v_align, scale) + + if rotation >= 180: + rotation -= 180 + h_align = {'left': 'right', 'right': 'left'}.get(h_align, h_align) + x0, y0 = -x0, y0 + + x0, y0 = rotate_point(x0, y0, math.radians(-rotation)) + + alx, aly = 0, 0 + if h_align != 'left': + (minx, miny), (maxx, maxy) = bbox = self.bounding_box(text, size, space_width, char_gap) + w = maxx - minx + if h_align == 'right': + alx = -w + elif h_align == 'center': + alx = -w/2 + else: + raise ValueError(f'Invalid h_align value "{h_align}"') + + if v_align == 'top': + aly = -1.2*size + elif v_align == 'middle': + aly = -1.2*size/2 + elif v_align != 'bottom': + raise ValueError(f'Invalid v_align value "{v_align}"') + for c in text: if c == ' ': x += space_width*size @@ -42,15 +73,46 @@ class Newstroke: glyph_w = max(width, max(x for st in strokes for x, _y in st)) for st in strokes: - yield self.transform_stroke(st, translate=(x, 0), scale=(size, size)) + yield self.transform_stroke(st, translate=(x0, y0), offset=(x+alx, aly), rotation=math.radians(-rotation), scale=(sx*size, sy*size)) x += glyph_w*size + def render_svg(self, text, size=1.0, x0=0, y0=0, rotation=0, h_align='left', v_align='bottom', space_width=DEFAULT_SPACE_WIDTH, char_gap=DEFAULT_CHAR_GAP, **svg_attrs): + if 'stroke_linecap' not in svg_attrs: + svg_attrs['stroke_linecap'] = 'round' + if 'stroke_linejoin' not in svg_attrs: + svg_attrs['stroke_linejoin'] = 'round' + if 'stroke_width' not in svg_attrs: + svg_attrs['stroke_width'] = f'{0.2*size:.3f}' + svg_attrs['fill'] = 'none' + + strokes = ['M ' + ' L '.join(f'{x:.3f} {y:.3f}' for x, y in stroke) + for stroke in self.render(text, size=size, x0=x0, y0=y0, rotation=rotation, h_align=h_align, + v_align=v_align, space_width=space_width, char_gap=char_gap, + scale=(1, -1))] + return Tag('path', d=' '.join(strokes), **svg_attrs) + + def bounding_box(self, text, size=1.0, space_width=DEFAULT_SPACE_WIDTH, char_gap=DEFAULT_CHAR_GAP): + text = unicodedata.normalize('NFC', text) + missing_glyph = self.glyphs['?'] + x = 0 + for c in text: + if c == ' ': + x += space_width*size + continue + + width, strokes = self.glyphs.get(c, missing_glyph) + glyph_w = max(width, max(x for st in strokes for x, _y in st)) + x += glyph_w*size + + return (0, -0.2*size), (x, 1.2*size) + @classmethod - def transform_stroke(kls, stroke, translate, scale): - dx, dy = translate + def transform_stroke(kls, stroke, translate, offset, scale, rotation=0): + x0, y0 = translate sx, sy = scale - return [(x*sx+dx, y*sy+dy) for x, y in stroke] + dx, dy = offset + return [rotate_point(x*sx+dx+x0, y*sy+dy+y0, rotation, x0, y0) for x, y in stroke] def load_font(self, newstroke_cpp): |