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""" Test suite for affine transforms.
:Author: Eric Jones, Enthought, Inc., eric@enthought.com
:Copyright: Space Telescope Science Institute
:License: BSD Style
So far, this is mainly a "smoke test" suite to make sure
nothing is obviously wrong.
"""
from __future__ import with_statement
import unittest
from numpy import alltrue, array, ravel
from kiva import affine
from kiva import basecore2d
from kiva import constants
class test_is_fully_transparent(unittest.TestCase):
def test_simple(self):
self.assert_(basecore2d.is_fully_transparent([1, 1, 1, 0]))
self.assert_(not basecore2d.is_fully_transparent([0, 0, 0, 1]))
self.assert_(not basecore2d.is_fully_transparent([0, 0, 0, .5]))
class test_fill_equal(unittest.TestCase):
def test_simple(self):
self.assert_(basecore2d.fill_equal(array([0, 0, 0, 0]),
array([0, 0, 0, 0])))
self.assert_(not basecore2d.fill_equal(array([0, 0, 0, 0]),
array([0, 0, 0, 1])))
self.assert_(not basecore2d.fill_equal(array([0, 0, 0, 0]),
array([1, 0, 0, 0])))
class LineStateTestCase(unittest.TestCase):
def create_ls(self):
color = array([0, 0, 0, 1])
width = 2
join = basecore2d.JOIN_MITER
cap = basecore2d.CAP_ROUND
phase = 0
pattern = array([5, 5])
dash = (phase, pattern)
ls = basecore2d.LineState(color, width, cap, join, dash)
return ls
def test_create(self):
self.create_ls()
def test_color_on_copy(self):
# The following test to make sure that a copy
# was actually made of the line_color container(array).
# If it isn't, both ls1 and ls2 will point at the same
# data, and the change to the color affects both
# line_states instead of just ls1.
ls1 = self.create_ls()
ls2 = ls1.copy()
ls1.line_color[1] = 10
self.assert_(not basecore2d.line_state_equal(ls1, ls2))
def test_dash_on_copy(self):
ls1 = self.create_ls()
ls2 = ls1.copy()
ls1.line_dash[1][0] = 10
self.assert_(not basecore2d.line_state_equal(ls1, ls2))
def test_cmp_for_different_length_dash_patterns(self):
ls1 = self.create_ls()
ls2 = ls1.copy()
ls1.line_dash = (ls1.line_dash[0], array([10, 10, 10, 10]))
self.assert_(not basecore2d.line_state_equal(ls1, ls2))
def test_cmp(self):
ls1 = self.create_ls()
ls2 = ls1.copy()
self.assert_(basecore2d.line_state_equal(ls1, ls2))
#line_dash no longer allowed to be none.
#def test_cmp_with_dash_as_none(self):
# ls1 = self.create_ls()
# ls2 = ls1.copy()
# #ls1.line_dash = None
# assert(not basecore2d.line_state_equal(ls1,ls2))
class GraphicsContextTestCase(unittest.TestCase):
def test_create_gc(self):
gc = basecore2d.GraphicsContextBase()
#----------------------------------------------------------------
# Test ctm transformations
#----------------------------------------------------------------
def test_get_ctm(self):
gc = basecore2d.GraphicsContextBase()
# default ctm should be identity matrix.
desired = affine.affine_identity()
actual = gc.get_ctm()
self.assert_(alltrue(ravel(actual == desired)))
def test_scale_ctm(self):
gc = basecore2d.GraphicsContextBase()
ident = affine.affine_identity()
sx, sy = 2., 3.
desired = affine.scale(ident, sx, sy)
gc.scale_ctm(sx, sy)
actual = gc.get_ctm()
self.assert_(alltrue(ravel(actual == desired)))
def test_rotate_ctm(self):
gc = basecore2d.GraphicsContextBase()
ident = affine.affine_identity()
angle = 2.
desired = affine.rotate(ident, angle)
gc.rotate_ctm(angle)
actual = gc.get_ctm()
self.assert_(alltrue(ravel(actual == desired)))
def test_translate_ctm(self):
gc = basecore2d.GraphicsContextBase()
ident = affine.affine_identity()
x, y = 2., 3.
desired = affine.translate(ident, x, y)
gc.translate_ctm(x, y)
actual = gc.get_ctm()
self.assert_(alltrue(ravel(actual == desired)))
def test_concat_ctm(self):
gc = basecore2d.GraphicsContextBase()
ident = affine.affine_identity()
trans = affine.affine_from_rotation(2.)
x, y = 2., 3.
desired = affine.concat(ident, trans)
gc.concat_ctm(trans)
actual = gc.get_ctm()
self.assert_(alltrue(ravel(actual == desired)))
#-------------------------------------------------------------------------
# Setting drawing state variables
#
# These tests also check that the value is restored correctly with
# save/restore state.
#
# Checks are only done to see if variables are represented correctly in
# the graphics state. The effects on graphics rendering for these
# variables is not checked. That is all pretty much handled in the
# device_update_line_state and device_update_fill_state routines which
# access the state variables.
#
# Note: The tests peek into the state object to see if the if state
# variables are set. This ain't perfect, but core2d doesn't
# define accessor functions...
#-------------------------------------------------------------------------
def test_state_antialias(self):
gc = basecore2d.GraphicsContextBase()
# defaults to 1
self.assertEqual(gc.state.antialias, 1)
gc.set_antialias(0)
gc.save_state()
gc.set_antialias(1)
self.assertEqual(gc.state.antialias, 1)
gc.restore_state()
self.assertEqual(gc.state.antialias, 0)
def test_state_line_width(self):
gc = basecore2d.GraphicsContextBase()
# defaults to 1
self.assertEqual(gc.state.line_width, 1)
gc.set_line_width(5)
gc.save_state()
gc.set_line_width(10)
self.assertEqual(gc.state.line_width, 10)
gc.restore_state()
self.assertEqual(gc.state.line_width, 5)
def test_state_line_join(self):
gc = basecore2d.GraphicsContextBase()
# defaults to JOIN_MITER
self.assertEqual(gc.state.line_join, constants.JOIN_MITER)
gc.set_line_join(constants.JOIN_BEVEL)
gc.save_state()
gc.set_line_join(constants.JOIN_ROUND)
self.assertEqual(gc.state.line_join, constants.JOIN_ROUND)
gc.restore_state()
self.assertEqual(gc.state.line_join, constants.JOIN_BEVEL)
# set_line_join should fail if one attempts to set a bad value.
self.assertRaises(ValueError, gc.set_line_join, (100,))
def test_state_miter_limit(self):
gc = basecore2d.GraphicsContextBase()
# defaults to 1.0
self.assertEqual(gc.state.miter_limit, 1.0)
gc.set_miter_limit(2.0)
gc.save_state()
gc.set_miter_limit(3.0)
self.assertEqual(gc.state.miter_limit, 3.0)
gc.restore_state()
self.assertEqual(gc.state.miter_limit, 2.0)
def test_state_line_cap(self):
gc = basecore2d.GraphicsContextBase()
# defaults to CAP_ROUND
self.assertEqual(gc.state.line_cap, constants.CAP_ROUND)
gc.set_line_cap(constants.CAP_BUTT)
gc.save_state()
gc.set_line_cap(constants.CAP_SQUARE)
self.assertEqual(gc.state.line_cap, constants.CAP_SQUARE)
gc.restore_state()
self.assertEqual(gc.state.line_cap, constants.CAP_BUTT)
# set_line_cap should fail if one attempts to set a bad value.
self.assertRaises(ValueError, gc.set_line_cap, (100,))
def test_state_line_dash(self):
gc = basecore2d.GraphicsContextBase()
# defaults to non-dashed line
self.assert_(not gc.state.is_dashed())
gc.set_line_dash([1.0, 2.0], phase=2.0)
gc.save_state()
gc.set_line_dash([3.0, 4.0])
self.assert_(gc.state.is_dashed())
self.assertEqual(gc.state.line_dash[0], 0)
self.assert_(alltrue(ravel(gc.state.line_dash[1] ==
array([3.0, 4.0]))))
gc.restore_state()
self.assert_(gc.state.is_dashed())
self.assertEqual(gc.state.line_dash[0], 2.0)
self.assert_(alltrue(ravel(gc.state.line_dash[1] ==
array([1.0, 2.0]))))
# pattern must be a container with atleast two values
self.assertRaises(ValueError, gc.set_line_cap, (100,))
self.assertRaises(ValueError, gc.set_line_cap, ([100],))
# phase must be positive.
self.assertRaises(ValueError, gc.set_line_cap, ([100, 200], -1))
def test_state_flatness(self):
gc = basecore2d.GraphicsContextBase()
# defaults to None
self.assertEqual(gc.state.flatness, None)
gc.set_flatness(1.0)
gc.save_state()
gc.set_flatness(2.0)
self.assertEqual(gc.state.flatness, 2.0)
gc.restore_state()
self.assertEqual(gc.state.flatness, 1.0)
def test_state_alpha(self):
gc = basecore2d.GraphicsContextBase()
# defaults to 1.0
self.assertEqual(gc.state.alpha, 1.0)
gc.set_alpha(0.0)
gc.save_state()
gc.set_alpha(0.5)
self.assertEqual(gc.state.alpha, 0.5)
gc.restore_state()
self.assertEqual(gc.state.alpha, 0.0)
def test_state_fill_color(self):
gc = basecore2d.GraphicsContextBase()
# defaults to [0,0,0,1]
self.assert_(alltrue(gc.state.fill_color == array([0, 0, 0, 1])))
gc.set_fill_color((0, 1, 0, 1))
gc.save_state()
gc.set_fill_color((1, 1, 1, 1))
self.assert_(alltrue(gc.state.fill_color == array([1, 1, 1, 1])))
gc.restore_state()
self.assert_(alltrue(gc.state.fill_color == array([0, 1, 0, 1])))
def test_state_stroke_color(self):
gc = basecore2d.GraphicsContextBase()
# defaults to [0,0,0,1]
self.assert_(alltrue(gc.state.line_color == array([0, 0, 0, 1])))
gc.set_stroke_color((0, 1, 0, 1))
gc.save_state()
gc.set_stroke_color((1, 1, 1, 1))
self.assert_(alltrue(gc.state.line_color == array([1, 1, 1, 1])))
gc.restore_state()
self.assert_(alltrue(gc.state.line_color == array([0, 1, 0, 1])))
def test_state_character_spacing(self):
gc = basecore2d.GraphicsContextBase()
# defaults to None
self.assertEqual(gc.state.character_spacing, 0.0)
gc.set_character_spacing(1.0)
gc.save_state()
gc.set_character_spacing(2.0)
self.assertEqual(gc.state.character_spacing, 2.0)
gc.restore_state()
self.assertEqual(gc.state.character_spacing, 1.0)
def test_state_text_drawing_mode(self):
gc = basecore2d.GraphicsContextBase()
# defaults to None
self.assertEqual(gc.state.text_drawing_mode, constants.TEXT_FILL)
gc.set_text_drawing_mode(constants.TEXT_OUTLINE)
gc.save_state()
gc.set_text_drawing_mode(constants.TEXT_CLIP)
self.assertEqual(gc.state.text_drawing_mode, constants.TEXT_CLIP)
gc.restore_state()
self.assertEqual(gc.state.text_drawing_mode, constants.TEXT_OUTLINE)
# try an unacceptable value.
self.assertRaises(ValueError, gc.set_text_drawing_mode, (10,))
#-------------------------------------------------------------------------
# Use context manager for saving and restoring state.
#-------------------------------------------------------------------------
def test_state_context_manager(self):
gc = basecore2d.GraphicsContextBase()
# Set an assortment of state properties.
gc.set_antialias(0)
gc.set_line_width(5)
gc.set_fill_color((0, 1, 0, 1))
with gc:
# Change the state properties.
gc.set_antialias(1)
self.assertEqual(gc.state.antialias, 1)
gc.set_line_width(10)
self.assertEqual(gc.state.line_width, 10)
gc.set_fill_color((1, 1, 1, 1))
self.assert_(alltrue(gc.state.fill_color == array([1, 1, 1, 1])))
# Verify that we're back to the earlier settings.
self.assertEqual(gc.state.antialias, 0)
self.assertEqual(gc.state.line_width, 5)
self.assert_(alltrue(gc.state.fill_color == array([0, 1, 0, 1])))
def test_state_context_manager_nested(self):
gc = basecore2d.GraphicsContextBase()
# Set an assortment of state properties.
gc.set_antialias(0)
gc.set_line_width(5)
gc.set_fill_color((0, 1, 0, 1))
with gc:
# Change the state properties.
gc.set_antialias(1)
self.assertEqual(gc.state.antialias, 1)
gc.set_line_width(10)
self.assertEqual(gc.state.line_width, 10)
gc.set_fill_color((1, 1, 1, 1))
self.assert_(alltrue(gc.state.fill_color == array([1, 1, 1, 1])))
with gc:
# Change the state properties.
gc.set_antialias(0)
self.assertEqual(gc.state.antialias, 0)
gc.set_line_width(2)
self.assertEqual(gc.state.line_width, 2)
gc.set_fill_color((1, 1, 0, 1))
self.assert_(alltrue(gc.state.fill_color ==
array([1, 1, 0, 1])))
# Verify that we're back to the earlier settings.
self.assertEqual(gc.state.antialias, 1)
self.assertEqual(gc.state.line_width, 10)
self.assert_(alltrue(gc.state.fill_color == array([1, 1, 1, 1])))
# Verify that we're back to the earlier settings.
self.assertEqual(gc.state.antialias, 0)
self.assertEqual(gc.state.line_width, 5)
self.assert_(alltrue(gc.state.fill_color == array([0, 1, 0, 1])))
#-------------------------------------------------------------------------
# Begin/End Page
# These are implemented yet. The tests are just here to remind me that
# they need to be.
#-------------------------------------------------------------------------
def test_begin_page(self):
#just to let me know it needs implementation.
gc = basecore2d.GraphicsContextBase()
gc.begin_page()
def test_end_page(self):
#just to let me know it needs implementation.
gc = basecore2d.GraphicsContextBase()
gc.end_page()
#-------------------------------------------------------------------------
# flush/synchronize
# These are implemented yet. The tests are just here to remind me that
# they need to be.
#-------------------------------------------------------------------------
def test_synchronize(self):
#just to let me know it needs implementation.
gc = basecore2d.GraphicsContextBase()
gc.synchronize()
def test_flush(self):
#just to let me know it needs implementation.
gc = basecore2d.GraphicsContextBase()
gc.flush()
#-------------------------------------------------------------------------
# save/restore state.
#
# Note: These test peek into the state object to see if the if state
# variables are set. This ain't perfect, but core2d doesn't
# define accessor functions...
#
# items that need to be tested:
# ctm
# clip region (not implemented)
# line width
# line join
#
#-------------------------------------------------------------------------
def test_save_state_line_width(self):
gc = basecore2d.GraphicsContextBase()
gc.set_line_width(5)
gc.save_state()
gc.set_line_width(10)
self.assertEqual(gc.state.line_width, 10)
gc.restore_state()
self.assertEqual(gc.state.line_width, 5)
#-------------------------------------------------------------------------
# Test drawing path empty
#-------------------------------------------------------------------------
def test_is_path_empty1(self):
""" A graphics context should start with an empty path.
"""
gc = basecore2d.GraphicsContextBase()
self.assert_(gc.is_path_empty())
def test_is_path_empty2(self):
""" A path that has moved to a point, but still hasn't drawn
anything is empty.
"""
gc = basecore2d.GraphicsContextBase()
x, y = 1., 2.
gc.move_to(x, y)
self.assert_(gc.is_path_empty())
def test_is_path_empty3(self):
""" A path that has moved to a point multiple times, but hasn't drawn
anything is empty.
"""
gc = basecore2d.GraphicsContextBase()
x, y = 1., 2.
gc.move_to(x, y)
# this should create another path.
x, y = 1., 2.5
gc.move_to(x, y)
self.assert_(gc.is_path_empty())
def test_is_path_empty4(self):
""" We've added a line, so the path is no longer empty.
"""
gc = basecore2d.GraphicsContextBase()
x, y = 1., 2.
gc.move_to(x, y)
gc.line_to(x, y)
self.assert_(not gc.is_path_empty())
#-------------------------------------------------------------------------
# Test drawing path add line
#
# Testing needed!
#-------------------------------------------------------------------------
def test_add_line(self):
"""
"""
pass
##################################################
if __name__ == "__main__":
unittest.main()
|
