Add FreeType python bindings to third_party.

1 files changed, 98 insertions, 0 deletions

diff --git a/third_party/freetype-py/examples/glyph-vector-2.py b/third_party/freetype-py/examples/glyph-vector-2.py
new file mode 100644
index 0000000..fc2c7da
--- /dev/null
+++ b/third_party/freetype-py/examples/glyph-vector-2.py
@@ -0,0 +1,98 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+# -----------------------------------------------------------------------------
+#
+#  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( 32*64 )
+    face.load_char('g')
+    slot = face.glyph
+
+    bitmap = face.glyph.bitmap
+    width  = face.glyph.bitmap.width
+    rows   = face.glyph.bitmap.rows
+    pitch  = face.glyph.bitmap.pitch
+
+    data = []
+    for i in range(rows):
+        data.extend(bitmap.buffer[i*pitch:i*pitch+width])
+    Z = numpy.array(data,dtype=numpy.ubyte).reshape(rows, width)
+
+    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
+    path = Path(VERTS, CODES)
+    glyph = patches.PathPatch(path, fill = True, facecolor=(0.8,0.5,0.8), alpha=.25, lw=0)
+    glyph_outline = patches.PathPatch(path, fill = False, edgecolor='black', lw=3)
+
+    plt.imshow(Z, extent=[x.min(), x.max(),y.min(), y.max()], origin='lower',
+               interpolation='nearest', cmap = plt.cm.gray_r, vmin=0, vmax=400)
+    plt.xticks(numpy.linspace(x.min(), x.max(), Z.shape[1]+1), ())
+    plt.yticks(numpy.linspace(y.min(), y.max(), Z.shape[0]+1), ())
+    plt.grid(color='k', linewidth=1, linestyle='-')
+    axis.add_patch(glyph)
+    axis.add_patch(glyph_outline)
+    axis.set_xlim(x.min(), x.max())
+    axis.set_ylim(y.min(), y.max())
+
+    plt.savefig('test.svg')
+    plt.show()