Added ABGR MASK_MODE

python-pillow · Jul 13, 2022 · 9f6a315 · 9f6a315
1 parent 2b9d484
commit 9f6a315
Show file tree

Hide file tree

Showing 3 changed files with 9 additions and 0 deletions.
diff --git a/Tests/images/rgb32bf-abgr.bmp b/Tests/images/rgb32bf-abgr.bmp
diff --git a/Tests/test_file_bmp.py b/Tests/test_file_bmp.py
@@ -129,6 +129,13 @@ def test_rgba_bitfields():
 
     assert_image_equal_tofile(im, "Tests/images/bmp/q/rgb32bf-xbgr.bmp")
 
+    # This test image has been manually hexedited
+    # to change the bitfield compression in the header from XBGR to ABGR
+    with Image.open("Tests/images/rgb32bf-abgr.bmp") as im:
+        assert_image_equal_tofile(
+            im.convert("RGB"), "Tests/images/bmp/q/rgb32bf-xbgr.bmp"
+        )
+
 
 def test_rle8():
     with Image.open("Tests/images/hopper_rle8.bmp") as im:

diff --git a/src/PIL/BmpImagePlugin.py b/src/PIL/BmpImagePlugin.py
@@ -173,6 +173,7 @@ def _bitmap(self, header=0, offset=0):
                 32: [
                     (0xFF0000, 0xFF00, 0xFF, 0x0),
                     (0xFF000000, 0xFF0000, 0xFF00, 0x0),
+                    (0xFF000000, 0xFF0000, 0xFF00, 0xFF),
                     (0xFF, 0xFF00, 0xFF0000, 0xFF000000),
                     (0xFF0000, 0xFF00, 0xFF, 0xFF000000),
                     (0x0, 0x0, 0x0, 0x0),
@@ -183,6 +184,7 @@ def _bitmap(self, header=0, offset=0):
             MASK_MODES = {
                 (32, (0xFF0000, 0xFF00, 0xFF, 0x0)): "BGRX",
                 (32, (0xFF000000, 0xFF0000, 0xFF00, 0x0)): "XBGR",
+                (32, (0xFF000000, 0xFF0000, 0xFF00, 0xFF)): "ABGR",
                 (32, (0xFF, 0xFF00, 0xFF0000, 0xFF000000)): "RGBA",
                 (32, (0xFF0000, 0xFF00, 0xFF, 0xFF000000)): "BGRA",
                 (32, (0x0, 0x0, 0x0, 0x0)): "BGRA",