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Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 8 |
1 files changed, 4 insertions, 4 deletions
@@ -77,10 +77,10 @@ Bugs files with other colorspaces, you must explicitly specify it using the `--colorspace` option. - - Input images with alpha channels are not allowed. PDF doesn't support alpha - channels in images and thus, the alpha channel of the input would have to be - discarded. But img2pdf will always be lossless and thus, input images must - not carry transparency information. + - Input images with alpha channels are not allowed. PDF only supports + transparency using binary masks but is unable to store 8-bit transparency + information as part of the image itself. But img2pdf will always be lossless + and thus, input images must not carry transparency information. - img2pdf uses PIL (or Pillow) to obtain image meta data and to convert the input if necessary. To prevent decompression bomb denial of service attacks, |