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Pango Reference Manual | |
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PangoEngineLang;
PangoEngineLangClass;
#define PANGO_ENGINE_TYPE_LANG
#define PANGO_ENGINE_LANG_DEFINE_TYPE (name, prefix, class_init, instance_init)
The language engines are rendering-system independent
engines that determine line, word, and character breaks for character strings.
These engines are used in pango_break().
typedef struct _PangoEngineLang PangoEngineLang;
The PangoEngineLang class is implemented by engines that customize the rendering-system independent part of the Pango pipeline for a particular script or language. For instance, a custom PangoEngineLang could be provided for Thai to implement the dictionary-based word boundary lookups needed for that language.
typedef struct {
void (*script_break) (PangoEngineLang *engine,
const char *text,
int len,
PangoAnalysis *analysis,
PangoLogAttr *attrs,
int attrs_len);
} PangoEngineLangClass;
Class structure for PangoEngineLang
script_break () |
Provides a custom implementation of pango_break().
If NULL, pango_default_break() is used instead. If not NULL, for
Pango versions before 1.16 (module interface version before 1.6.0),
this was called instead of pango_default_break(), but in newer versions,
pango_default_break() is always called and this is called after that to
allow tailoring the breaking results.
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#define PANGO_ENGINE_TYPE_LANG "PangoEngineLang"
A string constant defining the engine type for language engines. These engines derive from PangoEngineLang.
#define PANGO_ENGINE_LANG_DEFINE_TYPE(name, prefix, class_init, instance_init)
Outputs the necessary code for GObject type registration for a PangoEngineLang class defined in a module. Two static symbols are defined.
static GTypeprefix_type; static voidprefix_register_type (GTypeModule module);
The prefix, _register_type()script_engine_init() function for
each type that your module implements, and then your script_engine_create()
function can create instances of the object as follows:
PangoEngine *engine = g_object_new (prefix_type, NULL);