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112 lines
5.4 KiB
Python
112 lines
5.4 KiB
Python
import unittest
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import s3tc
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import rgbcx
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from images import Blocks
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class TestBC1Encoder(unittest.TestCase):
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"""Test BC1 encoder with a variety of inputs with 3 color blocks disabled."""
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def setUp(self):
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self.bc1_encoder = rgbcx.BC1Encoder(rgbcx.InterpolatorType.Ideal, 5, False, False)
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def test_block_size(self):
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"""Ensure encoded block size is 8 bytes."""
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out = self.bc1_encoder.encode_image(Blocks.greyscale, 4, 4)
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self.assertEqual(self.bc1_encoder.block_width, 4, 'incorrect reported block width')
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self.assertEqual(self.bc1_encoder.block_height, 4, 'incorrect reported block height')
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self.assertEqual(self.bc1_encoder.block_size, 8, 'incorrect reported block size')
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self.assertEqual(len(out), 8, 'incorrect returned block size')
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def test_block_4color(self):
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"""Ensure encoding the greyscale test block results in a 4 color block."""
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out = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.greyscale, 4, 4))
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self.assertFalse(out.is_3color(), "returned 3 color block for greyscale test block")
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def test_block_greyscale_selectors(self):
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"""Ensure encoding the greyscale test block results in the correct selectors."""
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out = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.greyscale, 4, 4))
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first_row = out.selectors[0]
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expected_row = [0, 2, 3, 1]
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self.assertTrue(all(row == first_row for row in out.selectors), "block has different selectors in each row")
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self.assertTrue(all(row == expected_row for row in out.selectors), "block has incorrect selectors for greyscale test block")
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def test_block_3color(self):
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"""Ensure encoder doesn't output a 3 color block."""
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out1 = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.three_color, 4, 4))
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out2 = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.three_color_black, 4, 4))
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self.assertFalse(out1.is_3color(), "returned 3 color block with use_3color disabled")
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self.assertFalse(out2.is_3color(), "returned 3 color block with use_3color disabled")
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class TestBC1Encoder3Color(unittest.TestCase):
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"""Test BC1 encoder with a variety of inputs with 3 color blocks enabled."""
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def setUp(self):
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self.bc1_encoder = rgbcx.BC1Encoder(rgbcx.InterpolatorType.Ideal, 5, True, False)
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def test_block_4color(self):
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"""Ensure encoding the greyscale test block results in a 4 color block."""
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out = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.greyscale, 4, 4))
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self.assertFalse(out.is_3color(), "returned 3 color block for greyscale test block")
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def test_block_3color(self):
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"""Ensure encoding the 3 color test block results in a 3 color block."""
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out = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.three_color, 4, 4))
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self.assertTrue(out.is_3color(), "returned 4 color block with use_3color enabled")
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def test_block_3color_black(self):
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"""Ensure encoder doesn't output a 3 color block with black pixels."""
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out = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.three_color_black, 4, 4))
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self.assertFalse(out.is_3color() and any(3 in row for row in out.selectors),
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"returned 3 color block with black pixels with use_3color_black disabled")
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def test_block_selectors(self):
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"""Ensure encoding the 3 color test block results in the correct selectors."""
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out = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.three_color, 4, 4))
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first_row = out.selectors[0]
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expected_row = [1, 2, 2, 0]
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self.assertTrue(all(row == first_row for row in out.selectors), "block has different selectors in each row")
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self.assertTrue(all(row == expected_row for row in out.selectors), "block has incorrect selectors for 3 color test block")
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class TestBC1Encoder3ColorBlack(unittest.TestCase):
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""" Test BC1 encoder with a variety of inputs with 3 color blocks with black pixels enabled"""
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def setUp(self):
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self.bc1_encoder = rgbcx.BC1Encoder(rgbcx.InterpolatorType.Ideal, 5, True, True)
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def test_block_3color(self):
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"""Ensure encoding the 3 color test block results in a 3 color block."""
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out = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.three_color, 4, 4))
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self.assertTrue(out.is_3color(), "returned 4 color block with use_3color enabled")
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def test_block_3color_black(self):
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"""Ensure encoder outputs a 3 color block with black pixels."""
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out = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.three_color_black, 4, 4))
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self.assertTrue(out.is_3color(), "returned 4 color block with use_3color enabled")
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self.assertTrue(any(3 in row for row in out.selectors), "returned block without black pixels with use_3color_black enabled")
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def test_block_selectors(self):
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"""Ensure encoding the 3 color with black test block results in the correct selectors."""
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out = s3tc.BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.three_color_black, 4, 4))
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first_row = out.selectors[0]
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expected_row = [3, 1, 2, 0]
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self.assertTrue(all(row == first_row for row in out.selectors), "block has different selectors in each row")
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self.assertTrue(all(row == expected_row for row in out.selectors), "block has incorrect selectors for 3 color black test block")
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if __name__ == '__main__':
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unittest.main()
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