cairo-font-options: cairo_font_options_t
Description
How a font should be renderedDetailed Description
The font options specify how fonts should be rendered. Most of the time the
font options implied by a surface are just right and do not need any changes,
but for pixel-based targets tweaking font options may result in superior
output on a particular display.Enums and Flags
CairoSubpixelOrder-
The subpixel order specifies the order of color elements within
each pixel on the display device when rendering with an
antialiasing mode of
CAIRO_ANTIALIAS_SUBPIXEL.
default- Use the default subpixel order for
for the target device
rgb- Subpixel elements are arranged horizontally
with red at the left
bgr- Subpixel elements are arranged horizontally
with blue at the left
vrgb- Subpixel elements are arranged vertically
with red at the top
vbgr- Subpixel elements are arranged vertically
with blue at the top
CairoHintStyle-
Specifies the type of hinting to do on font outlines. Hinting
is the process of fitting outlines to the pixel grid in order
to improve the appearance of the result. Since hinting outlines
involves distorting them, it also reduces the faithfulness
to the original outline shapes. Not all of the outline hinting
styles are supported by all font backends. New entries may be added in future versions.
default- Use the default hint style for
font backend and target device
none- Do not hint outlines
slight- Hint outlines slightly to improve
contrast while retaining good fidelity to the original
shapes.
medium- Hint outlines with medium strength
giving a compromise between fidelity to the original shapes
and contrast
full- Hint outlines to maximize contrast
CairoHintMetrics-
Specifies whether to hint font metrics; hinting font metrics
means quantizing them so that they are integer values in
device space. Doing this improves the consistency of
letter and line spacing, however it also means that text
will be laid out differently at different zoom factors.
default- Hint metrics in the default
manner for the font backend and target device
off- Do not hint font metrics
on- Hint font metrics