Binding to Cairo, a 2D Vector Graphics Library.
This is an OCaml binding for the
Cairo library, a 2D graphics library
with support for multiple output devices.
You can read the API of
Cairo,
Cairo_gtk,
and
Cairo_pango
online.
You need the development files of Cairo (see the
conf-cairo
package)
and the OCaml packagelablgtk2 (in the OPAM packagelablgtk).
The easier way to install this library — once the prerequisites are set
up — is to use opam:
opam install cairo2
If you would like to compile from the sources, install Dune
opam install dune
and do:
dune build @install
or just make. You can then install it with:
dune install
You can read a version of the
Cairo tutorial using
this module. The code of this tutorial is available in theexamples/ directory. To compile it, just do
dune build @examples
All the examples below are available (with some comments) by clicking
on images in the tutorial.
setsourcergba.ml produces
setsourcegradient.ml shows how to use
radial and linear patterns. It generates:
path_close.ml shows how to draw a closed
path. It produces the PNG:
textextents.ml displays graphically the various
dimensions one can request about text. It generates the PNG:
text_extents.ml exemplifies drawing
consecutive UTF-8 strings in a PDF file. Some helping lines are
also added to show the text extents.
tips_ellipse.ml shows the action of
dilation on the line width and how to properly draw ellipses.
It generates the PNG:
tips_letter.ml illustrates the wrong way
of centering characters based on their individual extents:
Instead, one should combine them with the font extents as shown in
tips_font.ml to have:
diagram.ml draw the images of the section
Cairo’s Drawing Model:
draw.ml generates the various images in
Drawing with Cairo, namely:
