Test cases for transparency

Test support on macOS
Always initialize `smask`
2 changed files with 425 additions and 167 deletions
--- a/src/img2pdf.py
+++ b/src/img2pdf.py
@ -858,6 +858,8 @@ class pdfdoc(object):
        image[PdfName.ColorSpace] = colorspace
        image[PdfName.BitsPerComponent] = depth

+        smask = None
+
        if color == Colorspace["CMYK;I"]:
            # Inverts all four channels
            image[PdfName.Decode] = [1, 0, 1, 0, 1, 0, 1, 0]
--- a/src/img2pdf_test.py
+++ b/src/img2pdf_test.py
Author	SHA1	Message	Date
Tamás Zahola	8dac6242fc	Test cases for transparency	3 years ago
Tamás Zahola	9cd5121477	Test support on macOS	3 years ago
Tamás Zahola	6516339ae3	Always initialize `smask`	3 years ago