handle monochrome png properly

6 years ago · ac9ba1d0f6
parent eaf9de23c9
commit ac9ba1d0f6
2 changed files with 6 additions and 2 deletions
--- a/src/img2pdf.py
+++ b/src/img2pdf.py
@ -422,7 +422,9 @@ class pdfdoc(object):
        if imgformat is ImageFormat.CCITTGroup4:
            image[PdfName.BitsPerComponent] = 1
        else:
-            if color == Colorspace.P:
+            if color == Colorspace['1']:
+                image[PdfName.BitsPerComponent] = 1
+            elif color == Colorspace.P:
                if len(palette) <= 2**1:
                    image[PdfName.BitsPerComponent] = 1
                elif len(palette) <= 2**4:
@ -451,7 +453,9 @@ class pdfdoc(object):
            else:
                decodeparms[PdfName.Colors] = 3
            decodeparms[PdfName.Columns] = imgwidthpx
-            if color == Colorspace.P:
+            if color == Colorspace['1']:
+                decodeparms[PdfName.BitsPerComponent] = 1
+            elif color == Colorspace.P:
                if len(palette) <= 2**1:
                    decodeparms[PdfName.BitsPerComponent] = 1
                elif len(palette) <= 2**4:
--- a/src/tests/output/mono.png.pdf
+++ b/src/tests/output/mono.png.pdf