Release v0.4.0

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: whtsky

README.md

@@ -89,6 +89,12 @@ Compares two images, writes the output diff and returns the number of mismatched
 
 ## Changelog
 
+### v0.4.0
+
+- BREAKING CHANGE: remove `pixelmatch.contrib.PIL.from_PIL_to_raw_data` and `pixelmatch.contrib.PIL.to_PIL_from_raw_data` [#181](https://github.com/whtsky/pixelmatch-py/pull/181) ([@brianhelba](https://github.com/brianhelba))
+- BREAKING CHANGE: `pixelmatch.contrib.PIL.pixelmatch` now uses a fast path for byte-identical images; when `output` is provided and `diff_mask=False`, grayscale diff output values can differ from previous versions (typically up to +/-1 per channel due to PIL rounding) [#181](https://github.com/whtsky/pixelmatch-py/pull/181) ([@brianhelba](https://github.com/brianhelba))
+- perf: improve `pixelmatch.contrib.PIL.pixelmatch` performance (about 90x for identical images with `diff_mask=False`, about 150x with `diff_mask=True`) [#181](https://github.com/whtsky/pixelmatch-py/pull/181) ([@brianhelba](https://github.com/brianhelba))
+
 ### v0.3.1
 
 - fix: remove use of deprecated Pillow function [#178](https://github.com/whtsky/pixelmatch-py/pull/178) ([@brianhelba](https://github.com/brianhelba))

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pixelmatch"
-version = "0.3.1"
+version = "0.4.0"
 description = "A pixel-level image comparison library."
 authors = ["Wu Haotian <whtsky@gmail.com>"]
 license = "ISC"
@@ -28,4 +28,4 @@ requires = ["poetry_core>=1.0.0"]
 build-backend = "poetry.core.masonry.api"
 
 [tool.black]
-target-version = ['py310']
+target-version = ['py310']