""" 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 kiva.agg import GraphicsContextArray 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()