enum HarfBuzz::MemoryModeT

Overview

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 mmap()ed, it's okay to use @HB_MEMORY_READONLY_MAY_MAKE_WRITABLE, however, using that mode correctly is very tricky. Use @HB_MEMORY_MODE_READONLY instead.

Defined in:

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

Enum Members

Duplicate = 0_u32

HarfBuzz immediately makes a copy of the data.

Readonly = 1_u32

HarfBuzz client will never modify the data, and HarfBuzz will never modify the data.

Writable = 2_u32

HarfBuzz client made a copy of the data solely for HarfBuzz, so HarfBuzz may modify the data.

ReadonlyMayMakeWritable = 3_u32

See above

Class Method Summary

• .g_type : UInt64

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

Instance Method Summary

• #duplicate?
• #readonly?
• #readonly_may_make_writable?
• #writable?

Class Method Detail

Instance Method Detail