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76 lines
3.2 KiB
Python
76 lines
3.2 KiB
Python
import unittest
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import nose
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from parameterized import parameterized_class
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from s3tc import BC1Block
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from images import Blocks
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import quicktex.s3tc.bc1 as bc1
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import quicktex.s3tc.interpolator as interpolator
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ColorMode = bc1.BC1Encoder.ColorMode
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class TestBC1Encoder(unittest.TestCase):
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"""Test BC1 Encoder"""
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def setUp(self):
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self.bc1_encoder = bc1.BC1Encoder(5)
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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 get_class_name_blocks(cls, num, params_dict):
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return "%s%s" % (cls.__name__, params_dict['color_mode'].name,)
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@parameterized_class([
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{"color_mode": ColorMode.FourColor},
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{"color_mode": ColorMode.ThreeColor},
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{"color_mode": ColorMode.ThreeColorBlack},
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], class_name_func=get_class_name_blocks)
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class TestBC1EncoderBlocks(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 = bc1.BC1Encoder(5, self.color_mode)
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def test_block_4color(self):
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"""Test encoder output with 4 color greyscale testblock."""
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out = BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.greyscale, 4, 4))
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selectors = [[0, 2, 3, 1]] * 4
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self.assertFalse(out.is_3color(), "returned block color mode for greyscale test block")
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self.assertEqual(selectors, out.selectors, "block has incorrect selectors for greyscale test block")
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def test_block_3color(self):
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"""Test encoder output with 3 color test block."""
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out = BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.three_color, 4, 4))
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selectors = [[1, 2, 2, 0]] * 4
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if self.color_mode != ColorMode.FourColor: # we only care about the selectors if we are in 3 color mode
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self.assertTrue(out.is_3color(), "returned 4-color block for 3 color test block")
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self.assertEqual(selectors, out.selectors, "block has incorrect selectors for 3 color test block")
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else:
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self.assertFalse(out.is_3color(), "return 3-color block in 4-color mode")
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def test_block_3color_black(self):
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"""Test encoder output with 3 color test block with black pixels."""
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out = BC1Block.frombytes(self.bc1_encoder.encode_image(Blocks.three_color_black, 4, 4))
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selectors = [[3, 1, 2, 0]] * 4
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if self.color_mode == ColorMode.ThreeColorBlack: # we only care about the selectors if we are in 3 color black mode
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self.assertTrue(out.is_3color_black(), "returned 4-color block for 3 color test block with black")
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self.assertEqual(selectors, out.selectors, "block has incorrect selectors for 3 color with black test block")
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else:
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self.assertFalse(out.is_3color_black(), "returned incorrect block color mode for 3 color with black test block")
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if __name__ == '__main__':
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nose.main()
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