Functions

context_get_font_options(context: Context) → FontOptions | None

Retrieves any font rendering options previously set with context_set_font_options.

This function does not report options that are derived from the target surface by update_context.

Added in version 1.10.

Parameters:

context – a PangoContext, from a pangocairo font map

Returns:

the font options previously set on the context, or None if no options have been set. This value is owned by the context and must not be modified or freed.

context_get_resolution(context: Context) → float

Gets the resolution for the context.

See context_set_resolution

Added in version 1.10.

Parameters:

context – a PangoContext, from a pangocairo font map

Returns:

the resolution in “dots per inch”. A negative value will be returned if no resolution has previously been set.

context_set_font_options(context: Context, options: FontOptions | None = None) → None

Sets the font options used when rendering text with this context.

These options override any options that update_context derives from the target surface.

Added in version 1.10.

Parameters:

  • context – a PangoContext, from a pangocairo font map

  • options – a cairo_font_options_t, or None to unset any previously set options. A copy is made.

context_set_resolution(context: Context, dpi: float) → None

Sets the resolution for the context.

This is a scale factor between points specified in a PangoFontDescription and Cairo units. The default value is 96, meaning that a 10 point font will be 13 units high. (10 * 96. / 72. = 13.3).

Added in version 1.10.

Parameters:

  • context – a PangoContext, from a pangocairo font map

  • dpi – the resolution in “dots per inch”. (Physical inches aren’t actually involved; the terminology is conventional.) A 0 or negative value means to use the resolution from the font map.

context_set_shape_renderer(context: Context, func: Callable[[...], None] | None = None, *data: Any) → None

Sets callback function for context to use for rendering attributes of type %PANGO_ATTR_SHAPE.

See PangoCairoShapeRendererFunc for details.

Added in version 1.18.

Parameters:

  • context – a PangoContext, from a pangocairo font map

  • func – Callback function for rendering attributes of type ``%PANGO_ATTR_SHAPE``, or None to disable shape rendering.

  • data – User data that will be passed to func.

create_context(cr: Context) → Context

Creates a context object set up to match the current transformation and target surface of the Cairo context.

This context can then be used to create a layout using new.

This function is a convenience function that creates a context using the default font map, then updates it to cr. If you just need to create a layout for use with cr and do not need to access PangoContext directly, you can use create_layout instead.

Added in version 1.22.

Parameters:

cr – a Cairo context

Returns:

the newly created PangoContext

create_layout(cr: Context) → Layout

Creates a layout object set up to match the current transformation and target surface of the Cairo context.

This layout can then be used for text measurement with functions like get_size or drawing with functions like show_layout. If you change the transformation or target surface for cr, you need to call update_layout.

This function is the most convenient way to use Cairo with Pango, however it is slightly inefficient since it creates a separate PangoContext object for each layout. This might matter in an application that was laying out large amounts of text.

Added in version 1.10.

Parameters:

cr – a Cairo context

Returns:

the newly created PangoLayout

error_underline_path(cr: Context, x: float, y: float, width: float, height: float) → None

Add a squiggly line to the current path in the specified cairo context that approximately covers the given rectangle in the style of an underline used to indicate a spelling error.

The width of the underline is rounded to an integer number of up/down segments and the resulting rectangle is centered in the original rectangle.

Added in version 1.14.

Parameters:

  • cr – a Cairo context

  • x – The X coordinate of one corner of the rectangle

  • y – The Y coordinate of one corner of the rectangle

  • width – Non-negative width of the rectangle

  • height – Non-negative height of the rectangle

font_map_get_default() → FontMap
font_map_new() → FontMap
font_map_new_for_font_type(fonttype: FontType) → FontMap | None
Parameters:

fonttype

glyph_string_path(cr: Context, font: Font, glyphs: GlyphString) → None

Adds the glyphs in glyphs to the current path in the specified cairo context.

The origin of the glyphs (the left edge of the baseline) will be at the current point of the cairo context.

Added in version 1.10.

Parameters:

  • cr – a Cairo context

  • font – a PangoFont from a PangoCairoFontMap

  • glyphs – a PangoGlyphString

layout_line_path(cr: Context, line: LayoutLine) → None

Adds the text in PangoLayoutLine to the current path in the specified cairo context.

The origin of the glyphs (the left edge of the line) will be at the current point of the cairo context.

Added in version 1.10.

Parameters:

  • cr – a Cairo context

  • line – a PangoLayoutLine

layout_path(cr: Context, layout: Layout) → None

Adds the text in a PangoLayout to the current path in the specified cairo context.

The top-left corner of the PangoLayout will be at the current point of the cairo context.

Added in version 1.10.

Parameters:

  • cr – a Cairo context

  • layout – a Pango layout

show_error_underline(cr: Context, x: float, y: float, width: float, height: float) → None

Draw a squiggly line in the specified cairo context that approximately covers the given rectangle in the style of an underline used to indicate a spelling error.

The width of the underline is rounded to an integer number of up/down segments and the resulting rectangle is centered in the original rectangle.

Added in version 1.14.

Parameters:

  • cr – a Cairo context

  • x – The X coordinate of one corner of the rectangle

  • y – The Y coordinate of one corner of the rectangle

  • width – Non-negative width of the rectangle

  • height – Non-negative height of the rectangle

show_glyph_item(cr: Context, text: str, glyph_item: GlyphItem) → None

Draws the glyphs in glyph_item in the specified cairo context,

embedding the text associated with the glyphs in the output if the output format supports it (PDF for example), otherwise it acts similar to show_glyph_string.

The origin of the glyphs (the left edge of the baseline) will be drawn at the current point of the cairo context.

Note that text is the start of the text for layout, which is then indexed by glyph_item->item->offset.

Added in version 1.22.

Parameters:

  • cr – a Cairo context

  • text – the UTF-8 text that glyph_item refers to

  • glyph_item – a PangoGlyphItem

show_glyph_string(cr: Context, font: Font, glyphs: GlyphString) → None

Draws the glyphs in glyphs in the specified cairo context.

The origin of the glyphs (the left edge of the baseline) will be drawn at the current point of the cairo context.

Added in version 1.10.

Parameters:

  • cr – a Cairo context

  • font – a PangoFont from a PangoCairoFontMap

  • glyphs – a PangoGlyphString

show_layout(cr: Context, layout: Layout) → None

Draws a PangoLayout in the specified cairo context.

The top-left corner of the PangoLayout will be drawn at the current point of the cairo context.

Added in version 1.10.

Parameters:

  • cr – a Cairo context

  • layout – a Pango layout

show_layout_line(cr: Context, line: LayoutLine) → None

Draws a PangoLayoutLine in the specified cairo context.

The origin of the glyphs (the left edge of the line) will be drawn at the current point of the cairo context.

Added in version 1.10.

Parameters:

  • cr – a Cairo context

  • line – a PangoLayoutLine

update_context(cr: Context, context: Context) → None

Updates a PangoContext previously created for use with Cairo to match the current transformation and target surface of a Cairo context.

If any layouts have been created for the context, it’s necessary to call context_changed on those layouts.

Added in version 1.10.

Parameters:

  • cr – a Cairo context

  • context – a PangoContext, from a pangocairo font map

update_layout(cr: Context, layout: Layout) → None

Updates the private PangoContext of a PangoLayout created with create_layout to match the current transformation and target surface of a Cairo context.

Added in version 1.10.

Parameters:

  • cr – a Cairo context

  • layout – a PangoLayout, from create_layout