/unit/test_wxagg.py

#!/usr/bin/env pythonw
# Name: test_wxagg.py
# Purpose: exercises the agg to wx.Image and wx.Bitmap conversion functions
# Author: Ken McIvor <mcivor@iit.edu>
#
# Copyright 2005 Illinois Institute of Technology
#
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# "Software"), to deal in the Software without restriction, including
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from __future__ import print_function


import wx
import time
import matplotlib
matplotlib.use('Agg')
from matplotlib.figure import Figure
from matplotlib.transforms import Bbox, Point, Value
from matplotlib.backends.backend_agg import FigureCanvasAgg
from matplotlib.backends.backend_wxagg import _py_convert_agg_to_wx_image, \
    _py_convert_agg_to_wx_bitmap
import matplotlib.backends._wxagg as wxagg


####################
# Test Configuration
####################

# Simple tests -- write PNG images of the plots
TEST_PY  = 0
TEST_EXT = 0

# Timing tests -- print time per plot
TIME_PY  = 1
TIME_EXT = 1


#################
# Test Parameters
#################

# Bounding box to use in testing
ll_x = 320
ll_y = 240
ur_x = 640
ur_y = 480
BBOX = Bbox(Point(Value(ll_x), Value(ll_y)),
            Point(Value(ur_x), Value(ur_y)))

# Number of iterations for timing
NITERS = 25


###############################################################################


#
# Testing framework
#

def time_loop(function, args):
    i = 0
    start = time.time()
    while i < NITERS:
        function(*args)
        i += 1
    return (time.time() - start)/NITERS


def make_figure():
    figure = Figure((6.4, 4.8), 100, frameon=False)
    canvas = FigureCanvasAgg(figure)
    return figure, canvas


def plot_sin(figure):
    from pylab import arange, sin, pi
    t = arange(0.0, 2.0, 0.01)
    s = sin(2*pi*t)

    axes = figure.gca()
    axes.plot(t, s, linewidth=1.0)
    axes.set_title('title')


def main():
    app = wx.PySimpleApp()
    figure, canvas = make_figure()
    bbox = None
    plot_sin(figure)
    canvas.draw()
    agg = canvas.get_renderer()

    if 0:
        print('ll.x =', BBOX.ll().x().get())
        print('ll.y =', BBOX.ll().y().get())
        print('ur.x =', BBOX.ur().x().get())
        print('ur.y =', BBOX.ur().y().get())

    # test the pure python implementation
    if TEST_PY:
        i_py   = _py_convert_agg_to_wx_image( agg, None)
        b_py   = _py_convert_agg_to_wx_bitmap(agg, None)
        i_py_b = _py_convert_agg_to_wx_image( agg, BBOX)
        b_py_b = _py_convert_agg_to_wx_bitmap(agg, BBOX)

        i_py.SaveFile(  'a_py_img.png', wx.BITMAP_TYPE_PNG)
        b_py.SaveFile(  'a_py_bmp.png', wx.BITMAP_TYPE_PNG)
        i_py_b.SaveFile('b_py_img.png', wx.BITMAP_TYPE_PNG)
        b_py_b.SaveFile('b_py_bmp.png', wx.BITMAP_TYPE_PNG)

    # test the C++ implementation
    if TEST_EXT:
        i_ext   = wxagg.convert_agg_to_wx_image( agg, None)
        b_ext   = wxagg.convert_agg_to_wx_bitmap(agg, None)
        i_ext_b = wxagg.convert_agg_to_wx_image( agg, BBOX)
        b_ext_b = wxagg.convert_agg_to_wx_bitmap(agg, BBOX)

        i_ext.SaveFile(  'a_ext_img.png', wx.BITMAP_TYPE_PNG)
        b_ext.SaveFile(  'a_ext_bmp.png', wx.BITMAP_TYPE_PNG)
        i_ext_b.SaveFile('b_ext_img.png', wx.BITMAP_TYPE_PNG)
        b_ext_b.SaveFile('b_ext_bmp.png', wx.BITMAP_TYPE_PNG)

    # time the pure python implementation
    if TIME_PY:
        t = time_loop(_py_convert_agg_to_wx_image, (agg,None))
        print('Python agg2img:        %.4f seconds (%.1f HZ)' % (t, 1/t))

        t = time_loop(_py_convert_agg_to_wx_bitmap, (agg,None))
        print('Python agg2bmp:        %.4f seconds (%.1f HZ)' % (t, 1/t))

        t = time_loop(_py_convert_agg_to_wx_image, (agg,BBOX))
        print('Python agg2img w/bbox: %.4f seconds (%.1f HZ)' % (t, 1/t))

        t = time_loop(_py_convert_agg_to_wx_bitmap, (agg,BBOX))
        print('Python agg2bmp w/bbox: %.4f seconds (%.1f HZ)' % (t, 1/t))

    # time the C++ implementation
    if TIME_EXT:
        t = time_loop(wxagg.convert_agg_to_wx_image, (agg,None))
        print('_wxagg agg2img:        %.4f seconds (%.1f HZ)' % (t, 1/t))

        t = time_loop(wxagg.convert_agg_to_wx_bitmap, (agg,None))
        print('_wxagg agg2bmp:        %.4f seconds (%.1f HZ)' % (t, 1/t))

        t = time_loop(wxagg.convert_agg_to_wx_image, (agg,BBOX))
        print('_wxagg agg2img w/bbox: %.4f seconds (%.1f HZ)' % (t, 1/t))

        t = time_loop(wxagg.convert_agg_to_wx_bitmap, (agg,BBOX))
        print('_wxagg agg2bmp w/bbox: %.4f seconds (%.1f HZ)' % (t, 1/t))


if __name__ == '__main__':
    main()