class HarfBuzz::PaintFuncsT

Overview

Glyph paint callbacks.

The callbacks assume that the caller maintains a stack of current transforms, clips and intermediate surfaces, as evidenced by the pairs of push/pop callbacks. The push/pop calls will be properly nested, so it is fine to store the different kinds of object on a single stack.

Not all callbacks are required for all kinds of glyphs. For rendering COLRv0 or non-color outline glyphs, the gradient callbacks are not needed, and the composite callback only needs to handle simple alpha compositing (#HB_PAINT_COMPOSITE_MODE_SRC_OVER).

The paint-image callback is only needed for glyphs with image blobs in the CBDT, sbix or SVG tables.

The custom-palette-color callback is only necessary if you want to override colors from the font palette with custom colors.

Defined in:

lib/gi-crystal/src/auto/harf_buzz-0.0/paint_funcs_t.cr

Constructors

Class Method Summary

Instance Method Summary

Constructor Detail

def self.new(pointer : Pointer(Void), transfer : GICrystal::Transfer) #

Class Method Detail

def self.g_type : UInt64 #

Returns the type id (GType) registered in GLib type system.


Instance Method Detail

def finalize #

def to_unsafe : Pointer(Void) #