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""" Needed Tests
clip_to_rect() tests
--------------------
DONE *. clip_to_rect is inclusive on lower end and exclusive on upper end.
DONE *. clip_to_rect behaves intelligently under scaled ctm.
DONE *. clip_to_rect intersects input rect with the existing clipping rect.
DONE *. current rectangular clipping path is saved/restored to the stack when
save_state/restore_state are called.
DONE *. clip_to_rect clears current path.
DONE *. clip_to_rect raises NotImplementedError under a rotated ctm.
clip_to_rects() tests
---------------------
DONE *. Test that clip_to_rects raises not implemented, or whatever.
"""
import unittest
from numpy import array, transpose
import nose
from kiva.agg import GraphicsContextArray
import kiva
from test_utils import Utils
class ClipToRectTestCase(unittest.TestCase, Utils):
#------------------------------------------------------------------------
# Simple Clipping to a single rectangle.
#------------------------------------------------------------------------
def clip_to_rect_helper(self, desired, scale, clip_rects):
""" desired -- 2D array with a single channels expected byte pattern.
scale -- used in scale_ctm() to change the ctm.
clip_args -- passed in as *clip_args to clip_to_rect.
"""
shp = tuple(transpose(desired.shape))
gc = GraphicsContextArray(shp, pix_format="rgb24")
gc.scale_ctm(scale, scale)
# clear background to white values (255, 255, 255)
gc.clear((1.0, 1.0, 1.0))
if isinstance(clip_rects, tuple):
gc.clip_to_rect(*clip_rects)
else:
for rect in clip_rects:
gc.clip_to_rect(*rect)
gc.rect(0, 0, 4, 4)
# These settings allow the fastest path.
gc.set_fill_color((0.0, 0.0, 0.0)) # black
gc.fill_path()
# test a single color channel
actual = gc.bmp_array[:,:,0]
self.assertRavelEqual(desired, actual)
def test_clip_to_rect_simple(self):
desired = array([[255, 255, 255, 255],
[255, 0, 0, 255],
[255, 0, 0, 255],
[255, 255, 255, 255]])
clip_rect = (1, 1, 2, 2)
self.clip_to_rect_helper(desired, 1, clip_rect)
def test_clip_to_rect_simple2(self):
desired = array([[255, 255, 255, 255],
[255, 255, 255, 255],
[255, 0, 255, 255],
[255, 255, 255, 255]])
clip_rect = (1, 1, 1, 1)
self.clip_to_rect_helper(desired, 1, clip_rect)
def test_clip_to_rect_negative(self):
desired = array([[255, 255, 255, 255],
[ 0, 0, 0, 255],
[ 0, 0, 0, 255],
[ 0, 0, 0, 255]])
clip_rect = (-1, -1, 4, 4)
self.clip_to_rect_helper(desired, 1, clip_rect)
def test_clip_to_rect_simple3(self):
desired = array([[255, 255, 255, 255],
[255, 0, 0, 255],
[255, 0, 0, 255],
[255, 255, 255, 255]])
clip_rect = (1, 1, 2.49, 2.49)
self.clip_to_rect_helper(desired, 1, clip_rect)
def test_clip_to_rect_simple4(self):
desired = array([[255, 0, 0, 0],
[255, 0, 0, 0],
[255, 0, 0, 0],
[255, 255, 255, 255]])
clip_rect = (1, 1, 2.5, 2.5)
self.clip_to_rect_helper(desired, 1, clip_rect)
def test_clip_to_rect_simple5(self):
# This tests clipping with a larger rectangle
desired = array([[255, 255, 255, 255],
[255, 0, 0, 255],
[255, 0, 0, 255],
[255, 255, 255, 255]])
clip_rects = [(1, 1, 2, 2), (0, 0, 4, 4)]
self.clip_to_rect_helper(desired, 1, clip_rects)
def test_empty_clip_region(self):
# This tests when the clipping region is clipped down to nothing.
desired = array([[255, 255, 255, 255],
[255, 255, 255, 255],
[255, 255, 255, 255],
[255, 255, 255, 255]])
clip_rects = [(1,1,4,4), (3,3,1,1), (1,1,1,1)]
self.clip_to_rect_helper(desired, 1, clip_rects)
def test_clip_to_rect_scaled(self):
desired = array([[255, 255, 255, 255, 255, 255, 255, 255],
[255, 255, 255, 255, 255, 255, 255, 255],
[255, 255, 0, 0, 0, 0, 255, 255],
[255, 255, 0, 0, 0, 0, 255, 255],
[255, 255, 0, 0, 0, 0, 255, 255],
[255, 255, 0, 0, 0, 0, 255, 255],
[255, 255, 255, 255, 255, 255, 255, 255],
[255, 255, 255, 255, 255, 255, 255, 255]])
clip_rect = (1, 1, 2, 2)
self.clip_to_rect_helper(desired, 2.0, clip_rect)
def test_clip_to_rect_scaled2(self):
desired = array([[255, 255, 255, 255, 255, 255, 255, 255],
[255, 255, 0, 0, 0, 0, 0, 255],
[255, 255, 0, 0, 0, 0, 0, 255],
[255, 255, 0, 0, 0, 0, 0, 255],
[255, 255, 0, 0, 0, 0, 0, 255],
[255, 255, 0, 0, 0, 0, 0, 255],
[255, 255, 255, 255, 255, 255, 255, 255],
[255, 255, 255, 255, 255, 255, 255, 255]])
clip_rect = (1, 1, 2.25, 2.25)
self.clip_to_rect_helper(desired, 2.0, clip_rect)
def test_save_restore_clip_state(self):
desired1 = array([[255, 255, 255, 255],
[255, 0, 0, 255],
[255, 0, 0, 255],
[255, 255, 255, 255]])
desired2 = array([[255, 0, 0, 0],
[255, 0, 0, 0],
[255, 0, 0, 0],
[255, 255, 255, 255]])
gc = GraphicsContextArray((4,4), pix_format="rgb24")
gc.clear((1.0, 1.0, 1.0))
gc.set_fill_color((0.0, 0.0, 0.0))
gc.clip_to_rect(1, 1, 3, 3)
gc.save_state()
gc.clip_to_rect(1, 1, 2, 2)
gc.rect(0, 0, 4, 4)
gc.fill_path()
actual1 = gc.bmp_array[:,:,0]
self.assertRavelEqual(desired1, actual1)
gc.restore_state()
gc.rect(0, 0, 4, 4)
gc.fill_path()
actual2 = gc.bmp_array[:,:,0]
self.assertRavelEqual(desired2, actual2)
def test_clip_to_rect_rotated(self):
# FIXME: test skipped
# This test raises an exception currently because the
# underlying library doesn't handle clipping to a rotated
# rectangle. For now, we catch the the case with an
# exception, so that people can't screw up. In the future,
# we should actually support this functionality.
raise nose.SkipTest
gc = GraphicsContextArray((1,1), pix_format="rgb24")
gc.rotate_ctm(1.0)
self.failUnlessRaises(NotImplementedError,
gc.clip_to_rect, 0, 0, 1, 1)
#------------------------------------------------------------------------
# Successive Clipping of multiple rectangles.
#------------------------------------------------------------------------
def successive_clip_helper(self, desired, scale,
clip_rect1, clip_rect2):
""" desired -- 2D array with a single channels expected byte pattern.
scale -- used in scale_ctm() to change the ctm.
clip_rect1 -- 1st clipping path.
clip_rect2 -- 2nd clipping path.
"""
shp = tuple(transpose(desired.shape))
gc = GraphicsContextArray(shp, pix_format="rgb24")
gc.scale_ctm(scale, scale)
# clear background to white values (255, 255, 255)
gc.clear((1.0, 1.0, 1.0))
gc.clip_to_rect(*clip_rect1)
gc.clip_to_rect(*clip_rect2)
gc.rect(0, 0, 4, 4)
# These settings allow the fastest path.
gc. set_fill_color((0.0, 0.0, 0.0)) # black
gc.fill_path()
# test a single color channel
actual = gc.bmp_array[:,:,0]
self.assertRavelEqual(desired, actual)
def test_clip_successive_rects(self):
desired = array([[255, 255, 255, 255],
[255, 0, 0, 255],
[255, 0, 0, 255],
[255, 255, 255, 255]])
clip_rect1 = (1, 1, 20, 20)
clip_rect2 = (0, 0, 3, 3)
self.successive_clip_helper(desired, 1.0, clip_rect1, clip_rect2)
def test_clip_successive_rects2(self):
desired = array([[255, 255, 255, 255],
[255, 0, 0, 255],
[255, 0, 0, 255],
[255, 255, 255, 255]])
clip_rect1 = (1, 1, 20, 20)
clip_rect2 = (-1, -1, 4, 4)
self.successive_clip_helper(desired, 1.0, clip_rect1, clip_rect2)
#------------------------------------------------------------------------
# Save/Restore clipping path.
#------------------------------------------------------------------------
def test_save_restore_clip_path(self):
desired = array([[255, 255, 255, 255],
[255, 0, 0, 255],
[255, 0, 0, 255],
[255, 255, 255, 255]])
# this is the clipping path we hope to see.
clip_rect1 = (1, 1, 2, 2)
# this will be a second path that will push/pop that should
# never be seen.
clip_rect2 = (1, 1, 1, 1)
shp = tuple(transpose(desired.shape))
gc = GraphicsContextArray(shp, pix_format="rgb24")
# clear background to white values (255, 255, 255)
gc.clear((1.0, 1.0, 1.0))
gc.clip_to_rect(*clip_rect1)
# push and then pop a path that shouldn't affect the drawing
gc.save_state()
gc.clip_to_rect(*clip_rect2)
gc.restore_state()
gc.rect(0, 0, 4, 4)
# These settings allow the fastest path.
gc. set_fill_color((0.0, 0.0, 0.0)) # black
gc.fill_path()
# test a single color channel
actual = gc.bmp_array[:,:,0]
self.assertRavelEqual(desired, actual)
def test_reset_path(self):
""" clip_to_rect() should clear the current path.
This is to maintain compatibility with the version
of kiva that sits on top of Apple's Quartz engine.
"""
desired = array([[255, 255, 0, 0],
[255, 255, 0, 0],
[255, 255, 0, 0],
[255, 255, 0, 0]])
shp = tuple(transpose(desired.shape))
gc = GraphicsContextArray(shp, pix_format="rgb24")
# clear background to white values (255, 255, 255)
gc.clear((1.0, 1.0, 1.0))
gc.rect(0, 0, 2, 4)
gc.clip_to_rect(0, 0, 4, 4)
gc.rect(2, 0, 2, 4)
# These settings allow the fastest path.
gc. set_fill_color((0.0, 0.0, 0.0)) # black
gc.fill_path()
# test a single color channel
actual = gc.bmp_array[:,:,0]
self.assertRavelEqual(desired, actual)
class ClipToRectsTestCase(unittest.TestCase):
def test_not_implemented(self):
""" fix me: Currently not implemented, so we just ensure that
any call to it throws an exception.
"""
gc = GraphicsContextArray((1,1), pix_format="rgb24")
gc.rotate_ctm(1.0)
#self.failUnlessRaises(NotImplementedError, gc.clip_to_rects, [[0, 0, 1, 1]])
if __name__ == "__main__":
unittest.main()
|
