The result is a Dict with the screen position of the text character in window {winid} at buffer line {lnum} and column {col}. {col} is a one-based byte index. The Dict has these members: row screen row col first screen column endcol last screen column curscol cursor screen column If the specified position is not visible, all values are zero. The "endcol" value differs from "col" when the character occupies more than one screen cell. E.g. for a Tab "col" can be 1 and "endcol" can be 8. The "curscol" value is where the cursor would be placed. For a Tab it would be the same as "endcol", while for a double width character it would be the same as "col". The conceal feature is ignored here, the column numbers are as if 'conceallevel' is zero. You can set the cursor to the right position and use screencol() to get the value with conceal taken into account. If the position is in a closed fold the screen position of the first character is returned, {col} is not used. Returns an empty Dict if {winid} is invalid.

Can also be used as a method:

GetWinid()->screenpos(lnum, col)