1 files changed, 55 insertions, 0 deletions
diff --git a/examples/hering.py b/examples/hering.py
new file mode 100755
index 0000000..e400e15
--- /dev/null
+++ b/examples/hering.py
@@ -0,0 +1,55 @@
+#!/usr/bin/env python
+"""cairo/cairo-demo/png/hering.c translated into Python
+"""
+
+import math
+
+import cairo
+
+WIDTH  = 300
+HEIGHT = 600
+
+def draw_hering (ctx, width, height):
+    LINES= 32
+    MAX_THETA = .80 * math.pi * 2
+    THETA_INC = 2.0 * MAX_THETA / (LINES-1)
+
+    ctx.set_source_rgb (0, 0, 0)
+    ctx.set_line_width (2.0)
+
+    ctx.save()
+
+    ctx.translate (width / 2, height / 2)
+    ctx.rotate (MAX_THETA)
+
+    for i in range (LINES):
+        ctx.move_to (-2 * width, 0)
+        ctx.line_to (2 * width, 0)
+        ctx.stroke()
+
+        ctx.rotate (- THETA_INC)
+
+    ctx.restore()
+
+    ctx.set_line_width (6)
+    ctx.set_source_rgb (1, 0, 0)
+
+    ctx.move_to (width / 4.0, 0)
+    ctx.rel_line_to (0, height)
+    ctx.stroke()
+
+    ctx.move_to (3 * width / 4.0, 0)
+    ctx.rel_line_to (0, height)
+    ctx.stroke()
+
+
+surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, WIDTH, HEIGHT)
+ctx = cairo.Context(surface)
+
+ctx.set_source_rgb (1, 1, 1)
+ctx.set_operator (cairo.OPERATOR_SOURCE)
+ctx.paint()
+
+draw_hering (ctx, WIDTH, HEIGHT)
+
+surface.write_to_png('hering.png')