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Diffstat (limited to 'third_party/freetype-py/examples/glyph-vector.py')
-rw-r--r-- | third_party/freetype-py/examples/glyph-vector.py | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/third_party/freetype-py/examples/glyph-vector.py b/third_party/freetype-py/examples/glyph-vector.py new file mode 100644 index 0000000..8cc34bf --- /dev/null +++ b/third_party/freetype-py/examples/glyph-vector.py @@ -0,0 +1,91 @@ +# ----------------------------------------------------------------------------- +# +# FreeType high-level python API - Copyright 2011 Nicolas P. Rougier +# Distributed under the terms of the new BSD license. +# +# ----------------------------------------------------------------------------- +''' +Show how to access glyph outline description. +''' +from freetype import * + +if __name__ == '__main__': + import numpy + import matplotlib.pyplot as plt + from matplotlib.path import Path + import matplotlib.patches as patches + + face = Face('./Vera.ttf') + face.set_char_size( 48*64 ) + face.load_char('S') + slot = face.glyph + + outline = slot.outline + points = numpy.array(outline.points, dtype=[('x',float), ('y',float)]) + x, y = points['x'], points['y'] + + figure = plt.figure(figsize=(8,10)) + axis = figure.add_subplot(111) + #axis.scatter(points['x'], points['y'], alpha=.25) + start, end = 0, 0 + + VERTS, CODES = [], [] + # Iterate over each contour + for i in range(len(outline.contours)): + end = outline.contours[i] + points = outline.points[start:end+1] + points.append(points[0]) + tags = outline.tags[start:end+1] + tags.append(tags[0]) + + segments = [ [points[0],], ] + for j in range(1, len(points) ): + segments[-1].append(points[j]) + if tags[j] & (1 << 0) and j < (len(points)-1): + segments.append( [points[j],] ) + verts = [points[0], ] + codes = [Path.MOVETO,] + for segment in segments: + if len(segment) == 2: + verts.extend(segment[1:]) + codes.extend([Path.LINETO]) + elif len(segment) == 3: + verts.extend(segment[1:]) + codes.extend([Path.CURVE3, Path.CURVE3]) + else: + verts.append(segment[1]) + codes.append(Path.CURVE3) + for i in range(1,len(segment)-2): + A,B = segment[i], segment[i+1] + C = ((A[0]+B[0])/2.0, (A[1]+B[1])/2.0) + verts.extend([ C, B ]) + codes.extend([ Path.CURVE3, Path.CURVE3]) + verts.append(segment[-1]) + codes.append(Path.CURVE3) + VERTS.extend(verts) + CODES.extend(codes) + start = end+1 + + + # Draw glyph lines + path = Path(VERTS, CODES) + glyph = patches.PathPatch(path, facecolor='.75', lw=1) + + # Draw "control" lines + for i, code in enumerate(CODES): + if code == Path.CURVE3: + CODES[i] = Path.LINETO + path = Path(VERTS, CODES) + patch = patches.PathPatch(path, ec='.5', fill=False, ls='dashed', lw=1 ) + + axis.add_patch(patch) + axis.add_patch(glyph) + + axis.set_xlim(x.min()-100, x.max()+100) + plt.xticks([]) + axis.set_ylim(y.min()-100, y.max()+100) + plt.yticks([]) + plt.show() + + + |