Differences
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| Both sides previous revision Previous revision Next revision | Previous revision Last revision Both sides next revision | ||
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cmap [2020/02/23 13:37] christian [Monster from the wild] |
cmap [2020/02/23 14:26] christian [Char to string mapping] |
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| CMaps are not well defined. Therefore, there are some interesting variations of them in the wild. Here is a small selection of some issues. | CMaps are not well defined. Therefore, there are some interesting variations of them in the wild. Here is a small selection of some issues. | ||
| - | ==== Mappings outside the codespace | + | ==== Codespace problems |
| + | |||
| + | === Wrong code length | ||
| <code postscript> | <code postscript> | ||
| Line 146: | Line 148: | ||
| This can be seen often. These illegal mappings are collected into the ''# | This can be seen often. These illegal mappings are collected into the ''# | ||
| + | |||
| + | === Mappings outside the codespace === | ||
| + | |||
| + | <code postscript> | ||
| + | %... | ||
| + | 1 begincodespacerange | ||
| + | < | ||
| + | endcodespacerange | ||
| + | 11 beginbfchar | ||
| + | < | ||
| + | < | ||
| + | < | ||
| + | < | ||
| + | < | ||
| + | %... | ||
| + | </ | ||
| + | |||
| + | Here, only the first mapping matches the code space. All others fall outside of it, because the second byte has to be between <00> and <04>. | ||
| ==== Wrong PostScript ==== | ==== Wrong PostScript ==== | ||
| Line 196: | Line 216: | ||
| </ | </ | ||
| - | It looks as if two codes (<24> and <50>) are mapped to a string of 2-byte characters. | + | Two codes (<24> and <50>) are mapped to a string of 2-byte characters. |
| + | |||
| + | Seen in a PDF with the '' | ||