""" Needed Tests Joins DONE 1. Each version same for all paths through aliased code. DONE 2. Each version same for all paths through antialiased code. Dashed Lines *. Should be tested for all versions of aliasing and all versions of join, cap. Clipping 1. Test that clip_to_rect is inclusive on lower end and exclusive on upper end. 2. Test that clip_to_rect behaves intelligently under ctm transforms. Note: There are numerous comments in code that refer to implementation details (outline, outline_aa, scanline_aa, etc.) from the C++ code. These are largely to help keep track of what paths have been tested. """ import unittest from numpy import array, alltrue, ravel from enthought.kiva.agg import GraphicsContextArray from enthought import kiva from test_utils import Utils class JoinStrokePathTestCase(unittest.TestCase, Utils): def helper(self, antialias, width, line_cap, line_join, size=(10,10)): gc = GraphicsContextArray(size, pix_format="rgb24") # clear background to white values (255, 255, 255) gc.clear((1.0, 1.0, 1.0)) # single horizontal line across bottom of buffer gc.move_to(1, 3) gc.line_to(7, 3) gc.line_to(7, 9) # Settings allow the faster outline path through C++ code gc. set_stroke_color((0.0, 0.0, 0.0)) # black gc.set_antialias(antialias) gc.set_line_width(width) gc.set_line_cap(line_cap) gc.set_line_join(line_join) gc.stroke_path() return gc def _test_alias_miter(self): """ fix me: This is producing aliased output. I am not sure what this array should look like exactly, so we just force it to fail right now and print out the results. """ antialias = False width = 3 line_cap = kiva.CAP_BUTT line_join = kiva.JOIN_MITER gc = self.helper(antialias, width, line_cap, line_join) actual = gc.bmp_array[:,:,0] assert 0, "join=miter, width=3, antialias=False\n%s" % actual #assert_arrays_equal(actual, desired) def _test_alias_bevel(self): """ fix me: This is producing a line width of 4 instead of 3. I am not sure what this array should look like exactly, so we just force it to fail right now and print out the results. """ antialias = False width = 3 line_cap = kiva.CAP_BUTT line_join = kiva.JOIN_BEVEL gc = self.helper(antialias, width, line_cap, line_join) actual = gc.bmp_array[:,:,0] assert 0, "join=bevel, width=3, antialias=False\n%s" % actual #assert_arrays_equal(actual, desired) def _test_alias_round(self): """ fix me: This is producing a line width of 4 instead of 3. Also, the corner doesn't look so round. I have checked that the scanline_aa renderer is setting the stroked_path.line_join() value to agg::round_join. I am not sure what this array should look like exactly, so we just force it to fail right now and print out the results. """ antialias = False width = 3 line_cap = kiva.CAP_BUTT line_join = kiva.JOIN_ROUND gc = self.helper(antialias, width, line_cap, line_join) actual = gc.bmp_array[:,:,0] assert 0, "join=round, width=3, antialias=False\n%s" % actual #assert_arrays_equal(actual, desired) def test_antialias_miter(self): """ fix me: How to make this pass on OS X and agg... """ antialias = True width = 3 line_cap = kiva.CAP_BUTT line_join = kiva.JOIN_MITER gc = self.helper(antialias, width, line_cap, line_join) actual = gc.bmp_array[:,:,0] desired = array([[255, 255, 255, 255, 255, 255, 255, 255, 255, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 127, 127, 127, 127, 0, 0, 0, 127, 255], [255, 0, 0, 0, 0, 0, 0, 0, 127, 255], [255, 0, 0, 0, 0, 0, 0, 0, 127, 255], [255, 127, 127, 127, 127, 127, 127, 127, 191, 255], [255, 255, 255, 255, 255, 255, 255, 255, 255, 255]]) self.assertRavelEqual(actual, desired) def test_antialias_bevel(self): antialias = True width = 3 line_cap = kiva.CAP_BUTT line_join = kiva.JOIN_BEVEL gc = self.helper(antialias, width, line_cap, line_join) actual = gc.bmp_array[:,:,0] desired = array([[255, 255, 255, 255, 255, 255, 255, 255, 255, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 127, 127, 127, 127, 0, 0, 0, 127, 255], [255, 0, 0, 0, 0, 0, 0, 0, 127, 255], [255, 0, 0, 0, 0, 0, 0, 31, 223, 255], [255, 127, 127, 127, 127, 127, 127, 223, 255, 255], [255, 255, 255, 255, 255, 255, 255, 255, 255, 255]]) self.assertRavelEqual(actual, desired) def test_antialias_round(self): """ fix me: How to make this test work for multiple renderers? """ antialias = True width = 3 line_cap = kiva.CAP_BUTT line_join = kiva.JOIN_ROUND gc = self.helper(antialias, width, line_cap, line_join) actual = gc.bmp_array[:,:,0] desired = array([[255, 255, 255, 255, 255, 255, 255, 255, 255, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 255, 255, 255, 255, 127, 0, 0, 127, 255], [255, 127, 127, 127, 127, 0, 0, 0, 127, 255], [255, 0, 0, 0, 0, 0, 0, 0, 127, 255], [255, 0, 0, 0, 0, 0, 0, 0, 180, 255], [255, 127, 127, 127, 127, 127, 127, 179, 253, 255], [255, 255, 255, 255, 255, 255, 255, 255, 255, 255]]) self.assertRavelEqual(actual, desired) if __name__ == "__main__": unittest.main()