HarfBuzz.MemoryMode – harfbuzz-gobject Reference Manual

MemoryMode

Description:

[ CCode ( cname = "hb_memory_mode_t" , cprefix = "HB_MEMORY_MODE_" , type_id = "hb_gobject_memory_mode_get_type ()" ) ]
[ GIR ( name = "memory_mode_t" ) ]
public enum MemoryMode

Data type holding the memory modes available to client programs.

Regarding these various memory-modes:

  • In no case shall the HarfBuzz client modify memory that is passed to HarfBuzz in a blob. If there is any such possibility, HB_MEMORY_MODE_DUPLICATE should be used such that HarfBuzz makes a copy immediately,
  • Use HB_MEMORY_MODE_READONLY otherwise, unless you really really really know what you are doing,
  • HB_MEMORY_MODE_WRITABLE is appropriate if you really made a copy of data solely for the purpose of passing to HarfBuzz and doing that just once (no reuse!),
  • If the font is mmaped, it's okay to use HB_MEMORY_MODE_READONLY_MAY_MAKE_WRITABLE, however, using that mode correctly is very tricky. Use HB_MEMORY_MODE_READONLY instead.

Namespace: HarfBuzz
Package: harfbuzz-gobject

Content:

Enum values:


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