allow 'matte' to be missing in MIFF

src/img2pdf.py

@@ -1696,7 +1696,7 @@ def parse_miff(data):
             elif hdata["colorspace"] == "Gray":
                     numchannels = 1
                     colorspace = Colorspace.L
-            if hdata["matte"]:
+            if hdata.get("matte"):
                 numchannels += 1
             if hdata.get("profile"):
                 # there is no key encoding the length of icc or exif data
@@ -1746,7 +1746,7 @@ def parse_miff(data):
     #    case "PseudoClass":
     elif hdata["class"] == "PseudoClass":
             assert "colors" in hdata
-            if hdata["matte"]:
+            if hdata.get("matte"):
                 numchannels = 2
             else:
                 numchannels = 1

src/img2pdf_test.py

@@ -3873,7 +3873,7 @@ def miff_cmyk8_img(tmp_path_factory, tmp_normal_png):
     assert "image" in identify[0]
     assert identify[0]["image"].get("format") == "MIFF", str(identify)
     assert identify[0]["image"].get("class") == "DirectClass"
-    assert identify[0]["image"].get("baseType") == "ColorSeparation"
+    assert identify[0]["image"].get("type") == "ColorSeparation"
     assert identify[0]["image"].get("geometry") == {
         "width": 60,
         "height": 60,
@@ -3917,7 +3917,7 @@ def miff_cmyk16_img(tmp_path_factory, tmp_normal_png):
     assert "image" in identify[0]
     assert identify[0]["image"].get("format") == "MIFF", str(identify)
     assert identify[0]["image"].get("class") == "DirectClass"
-    assert identify[0]["image"].get("baseType") == "ColorSeparation"
+    assert identify[0]["image"].get("type") == "ColorSeparation"
     assert identify[0]["image"].get("geometry") == {
         "width": 60,
         "height": 60,
@@ -3952,7 +3952,7 @@ def miff_rgb8_img(tmp_path_factory, tmp_normal_png):
     assert "image" in identify[0]
     assert identify[0]["image"].get("format") == "MIFF", str(identify)
     assert identify[0]["image"].get("class") == "DirectClass"
-    assert identify[0]["image"].get("baseType") == "TrueColor"
+    assert identify[0]["image"].get("type") == "TrueColor"
     assert identify[0]["image"].get("geometry") == {
         "width": 60,
         "height": 60,