From 36623f13d922461c897fe0ae1ff550a073385329 Mon Sep 17 00:00:00 2001
From: Roozbeh Pournader <roozbeh@google.com>
Date: Tue, 13 Jan 2015 08:50:27 -0800
Subject: Add FreeType python bindings to third_party.

---
 third_party/freetype-py/examples/glyph-color.py | 94 +++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 third_party/freetype-py/examples/glyph-color.py

(limited to 'third_party/freetype-py/examples/glyph-color.py')

diff --git a/third_party/freetype-py/examples/glyph-color.py b/third_party/freetype-py/examples/glyph-color.py
new file mode 100644
index 0000000..7f3b28e
--- /dev/null
+++ b/third_party/freetype-py/examples/glyph-color.py
@@ -0,0 +1,94 @@
+#!/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.
+#
+# -----------------------------------------------------------------------------
+'''
+Glyph colored rendering (with outline)
+'''
+from freetype import *
+
+if __name__ == '__main__':
+    import numpy as np
+    import matplotlib.pyplot as plt
+
+    face = Face('./Vera.ttf')
+    face.set_char_size( 96*64 )
+    RGBA = [('R',float), ('G',float), ('B',float), ('A',float)]
+
+    # Outline
+    flags = FT_LOAD_DEFAULT | FT_LOAD_NO_BITMAP
+    face.load_char('S', flags )
+    slot = face.glyph
+    glyph = slot.get_glyph()
+    stroker = Stroker( )
+    stroker.set(64, FT_STROKER_LINECAP_ROUND, FT_STROKER_LINEJOIN_ROUND, 0 )
+    glyph.stroke( stroker )
+    blyph = glyph.to_bitmap(FT_RENDER_MODE_NORMAL, Vector(0,0))
+    bitmap = blyph.bitmap
+    width, rows, pitch = bitmap.width, bitmap.rows, bitmap.pitch
+    top, left = blyph.top, blyph.left
+    data = []
+    for i in range(rows):
+        data.extend(bitmap.buffer[i*pitch:i*pitch+width])
+    Z = np.array(data).reshape(rows, width)/255.0
+    O = np.zeros((rows,width), dtype=RGBA)
+    O['A'] = Z
+    O['R'] = 1
+    O['G'] = 0
+    O['B'] = 0
+
+    # Plain
+    flags = FT_LOAD_RENDER
+    face.load_char('S', flags)
+    F = np.zeros((rows,width), dtype=RGBA)
+    Z = np.zeros((rows, width))
+    bitmap = face.glyph.bitmap
+    width, rows, pitch = bitmap.width, bitmap.rows, bitmap.pitch
+    top, left = face.glyph.bitmap_top, face.glyph.bitmap_left
+    dy = blyph.top - face.glyph.bitmap_top
+    dx = face.glyph.bitmap_left - blyph.left
+    data = []
+    for i in range(rows):
+        data.extend(bitmap.buffer[i*pitch:i*pitch+width])
+    Z[dx:dx+rows,dy:dy+width] = np.array(data).reshape(rows, width)/255.
+    F['R'] = 1
+    F['G'] = 1
+    F['B'] = 0
+    F['A'] = Z
+
+    # Combine outline and plain
+    R1,G1,B1,A1 = O['R'],O['G'],O['B'],O['A']
+    R2,G2,B2,A2 = F['R'],F['G'],F['B'],F['A']
+    Z = np.zeros(O.shape, dtype=RGBA)
+    Z['R'] = (A1 * R1 + A2 * (1 - A1) * R2)
+    Z['G'] = (A1 * G1 + A2 * (1 - A1) * G2)
+    Z['B'] = (A1 * B1 + A2 * (1 - A1) * B2)
+    Z['A'] = (A1      + A2 * (1 - A1))
+
+
+    # Draw
+    plt.figure(figsize=(12,5))
+
+    plt.subplot(1,3,1)
+    plt.title('Plain')
+    plt.xticks([]), plt.yticks([])
+    I = F.view(dtype=float).reshape(O.shape[0],O.shape[1],4)
+    plt.imshow(I, interpolation='nearest', origin='lower')
+
+    plt.subplot(1,3,2)
+    plt.title('Outline')
+    plt.xticks([]), plt.yticks([])
+    I = O.view(dtype=float).reshape(O.shape[0],O.shape[1],4)
+    plt.imshow(I, interpolation='nearest', origin='lower')
+
+    plt.subplot(1,3,3)
+    plt.title('Outline + Plain')
+    plt.xticks([]), plt.yticks([])
+    I = Z.view(dtype=float).reshape(O.shape[0],O.shape[1],4)
+    plt.imshow(I, interpolation='nearest', origin='lower')
+
+    plt.show()
-- 
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