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Chapter 18

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John Whitington 2023-06-11 19:18:16 +01:00
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cpdfmanual.tex
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@ -3769,7 +3769,7 @@ We convert a PDF file to JSON format like this:
\small\noindent\verb!cpdf -output-json in.pdf -o out.json! \small\noindent\verb!cpdf -output-json in.pdf -o out.json!
\end{framed} \end{framed}
The resultant JSON file is an array of arrays containing an object number followed by an \noindent The resultant JSON file is an array of arrays containing an object number followed by an
object, one for each object in the file and two special ones: object, one for each object in the file and two special ones:
\begin{itemize} \begin{itemize}
@ -4120,8 +4120,8 @@ For PNG files, the file must be 24bit RGB with no transparency and no interlacin
\noindent\verb!-to! Move to\\ \noindent\verb!-to! Move to\\
\noindent\verb!-line! Add line to path\\ \noindent\verb!-line! Add line to path\\
\noindent\verb!-bez! Add Bezier curve to path\\ \noindent\verb!-bez! Add Bezier curve to path\\
\noindent\verb!-bez23! Add Bezier v-op to path\\ \noindent\verb!-bez23! Add Bezier curve to path\\
\noindent\verb!-bez13! Add Bezier y-op to path\\ \noindent\verb!-bez13! Add Bezier curve to path\\
\noindent\verb!-circle! Add circle to path\\ \noindent\verb!-circle! Add circle to path\\
\noindent\verb!-stroke! Stroke path\\ \noindent\verb!-stroke! Stroke path\\
\noindent\verb!-fill! Fill path\\ \noindent\verb!-fill! Fill path\\
@ -4214,8 +4214,8 @@ We can draw on an existing PDF (or a new one created with \texttt{-create-pdf} f
\noindent\verb!-to "x y"! Move to\\ \noindent\verb!-to "x y"! Move to\\
\noindent\verb!-line "x y"! Add line to path\\ \noindent\verb!-line "x y"! Add line to path\\
\noindent\verb!-bez "x1 y1 x2 y2 x3 y3"! Add Bezier curve to path\\ \noindent\verb!-bez "x1 y1 x2 y2 x3 y3"! Add Bezier curve to path\\
\noindent\verb!-bez23 "x2 y2 x3 y3"! Add Bezier v-op to path\\ \noindent\verb!-bez23 "x2 y2 x3 y3"! Add Bezier curve to path\\
\noindent\verb!-bez13 "x1 y1 x3 y3"! Add Bezier y-op to path\\ \noindent\verb!-bez13 "x1 y1 x3 y3"! Add Bezier curve to path\\
\noindent\verb!-circle "x y r"! Add circle to path\\ \noindent\verb!-circle "x y r"! Add circle to path\\
\noindent\verb!-stroke! Stroke path\\ \noindent\verb!-stroke! Stroke path\\
\noindent\verb!-fill! Fill path\\ \noindent\verb!-fill! Fill path\\
@ -4374,7 +4374,7 @@ Lines may have dash patterns. A dash pattern consists of one or more numbers. Al
\noindent\verb!-matrix "a b c d e f"! Append to graphics matrix\\ \noindent\verb!-matrix "a b c d e f"! Append to graphics matrix\\
\noindent\verb!-mtrans "tx ty"! Translate the graphics matrix\\ \noindent\verb!-mtrans "tx ty"! Translate the graphics matrix\\
\noindent\verb!-mrot "x y a"! Rotate the graphics matrix counterclockwise around \texttt{(x, y)} by angle \texttt{a}\\ \noindent\verb!-mrot "x y a"! Rotate the graphics matrix counterclockwise around \texttt{(x, y)} by angle \texttt{a}\\
\noindent\verb!-mscale "x y sx sy"! Scale the graphics matrix around \texttt{x, y}\\ \noindent\verb!-mscale "x y sx sy"! Scale the graphics matrix around \texttt{(x, y)}\\
\noindent\verb!-mshearx "x y a"! Shear the graphics matrix in X around \texttt{(x, y)} by angle \texttt{a}\\ \noindent\verb!-mshearx "x y a"! Shear the graphics matrix in X around \texttt{(x, y)} by angle \texttt{a}\\
\noindent\verb!-msheary "x y a"! Shear the graphics matrix in Y around \texttt{(x, y)} by angle \texttt{a} \noindent\verb!-msheary "x y a"! Shear the graphics matrix in Y around \texttt{(x, y)} by angle \texttt{a}
\end{framed}} \end{framed}}
@ -4565,7 +4565,7 @@ We can draw text in a \textit{text section}, which must start with \texttt{-bt}
\fbox{\includegraphics[width=0.3\textwidth]{manualimages/lines.pdf}} \fbox{\includegraphics[width=0.3\textwidth]{manualimages/lines.pdf}}
\bigskip \bigskip
\noindent When composing text, we may need to find the width of a piece of text to see where to break it, or for right alignment. We can use \texttt{-textwidth} for this: \noindent When composing text, we may need to find the width of a piece of text to see where to break it, or for right alignment. We can use \texttt{-text-width} for this:
\begin{framed} \begin{framed}
\noindent\small\verb?cpdf -font Times-Roman -font-size 20 -text-width "Hello"? \noindent\small\verb?cpdf -font Times-Roman -font-size 20 -text-width "Hello"?