fix: lower Chinese full stop to bitmap cell baseline

2026-09-20 11:55:26 +08:00
parent 8a061bc3a0
commit 997ae29355
4 changed files with 100 additions and 0 deletions
@@ -0,0 +1,35 @@
+import unittest
+from PIL import Image
+from build_cjk import lower_full_stop, image_to_tga, tga_to_image
+from fix_full_stop import patch_atlas
+
+
+class FullStopTests(unittest.TestCase):
+    def test_ink_moves_to_bottom_without_shape_loss(self):
+        tile = Image.new('RGBA', (12, 12))
+        for x, y in [(3, 5), (4, 5), (2, 6), (5, 6), (2, 7), (5, 7), (3, 8), (4, 8)]:
+            tile.putpixel((x, y), (255, 255, 255, 255))
+        fixed = lower_full_stop(tile)
+        self.assertEqual(fixed.getbbox(), (2, 8, 6, 12))
+        self.assertEqual(tile.crop((2, 5, 6, 9)).tobytes(), fixed.crop((2, 8, 6, 12)).tobytes())
+        self.assertEqual(lower_full_stop(fixed).tobytes(), fixed.tobytes())
+
+    def test_patch_preserves_neighbors_header_footer_and_orientation(self):
+        for desc in (8, 40):
+            image = Image.new('RGBA', (24, 24), (7, 8, 9, 255))
+            image.paste((0, 0, 0, 0), (12, 12, 24, 24))
+            image.putpixel((14, 17), (255, 255, 255, 255))
+            raw = image_to_tga(image, desc, b'unchanged-footer')
+            meta = {'cell': 12, 'atlas': [24, 24], 'cells': {'41379': {'uni': '。', 'x': 12, 'y': 12}}}
+            fixed = patch_atlas(raw, meta)
+            after, _ = tga_to_image(fixed)
+            self.assertEqual(fixed[:18], raw[:18])
+            self.assertTrue(fixed.endswith(b'unchanged-footer'))
+            self.assertEqual(after.crop((0, 0, 24, 12)).tobytes(), image.crop((0, 0, 24, 12)).tobytes())
+            self.assertEqual(after.crop((0, 12, 12, 24)).tobytes(), image.crop((0, 12, 12, 24)).tobytes())
+            self.assertEqual(after.getpixel((14, 23)), (255, 255, 255, 255))
+            self.assertEqual(patch_atlas(fixed, meta), fixed)
+
+
+if __name__ == '__main__':
+    unittest.main()