Overview¶
Installing¶
To get started, there are multiple dependencies that require installation.
Installing cairocffi and pangocffi¶
Follow the instructions as provided by these dependencies:
Importing pangocairocffi¶
The module to import is named pangocairocffi, however you are welcome to alias
the module as pangocairo:
import pangocairocffi as pangocairo
pangocairocffi will dynamically load PangoCairo as a shared library upon importing. If it fails to find it, you will see an exception like this:
OSError: dlopen() failed to load pangocairo: pangocairo-1.0 / pangocairo-1.0.0
If PangoCairo is not installed as a shared library, pangocairocffi
supports specifying a path via an environment variable: PANGOCAIRO_LOCATION.
Note that the loading of dynamic libraries also applies to pangocffi, so be
sure to check Importing pangocffi as well for information on how to specify
paths to Pango, GLib, and GObject.
Basic usage and example¶
Below is a rough example of how to use pangocairocffi together with pangocffi and cairocffi:
import cairocffi
import pangocffi
import pangocairocffi
# Create the surface and get the context
filename = 'test.pdf'
pt_per_mm = 72 / 25.4
width, height = 210 * pt_per_mm, 297 * pt_per_mm # A4 portrait
surface = cairocffi.PDFSurface(filename, width, height)
context = cairocffi.Context(surface)
context.translate(0, height / 2)
# Build the layout
layout = pangocairocffi.create_layout(context)
layout.width = pangocffi.units_from_double(width)
layout.alignment = pangocffi.Alignment.CENTER
layout.apply_markup('<span font="italic 30">Hi from Παν語</span>')
# Render the layout
pangocairocffi.show_layout(context, layout)
# Output the surface
surface.finish()
Which produces the following output:
