static VALUE
cr_text_extents (VALUE self, VALUE utf8)
{
cairo_text_extents_t extents;
cairo_text_extents (_SELF, StringValuePtr (utf8), &extents);
cr_check_status (_SELF);
return CRTEXTEXTENTS2RVAL (&extents);
}
static VALUE
cr_glyph_extents (VALUE self, VALUE rb_glyphs)
{
cairo_text_extents_t extents;
cairo_glyph_t *glyphs;
int length;
RB_CAIRO__GLYPHS_TO_ARRAY (rb_glyphs, glyphs, length);
cairo_glyph_extents (_SELF, glyphs, length, &extents);
cr_check_status (_SELF);
return CRTEXTEXTENTS2RVAL (&extents);
}
static cairo_status_t
cr_user_font_face_render_glyph_func (cairo_scaled_font_t *scaled_font,
unsigned long glyph,
cairo_t *cr,
cairo_text_extents_t *extents)
{
cairo_status_t status = CAIRO_STATUS_SUCCESS;
cairo_font_face_t *face;
VALUE self;
VALUE receiver = Qnil;
ID id_method_name = cr_id_call;
face = cairo_scaled_font_get_font_face (scaled_font);
self = (VALUE)cairo_font_face_get_user_data (face, &ruby_object_key);
receiver = rb_ivar_get (self, cr_id_render_glyph);
if (NIL_P (receiver) && rb_obj_respond_to (self, cr_id_render_glyph, Qtrue))
{
receiver = self;
id_method_name = cr_id_render_glyph;
}
if (!NIL_P (receiver))
{
cr_user_font_face_invoke_data_t data;
VALUE argv[4];
argv[0] = CRSCALEDFONT2RVAL (scaled_font);
argv[1] = ULONG2NUM (glyph);
argv[2] = CRCONTEXT2RVAL (cr);
argv[3] = CRTEXTEXTENTS2RVAL (extents);
data.receiver = receiver;
data.method = id_method_name;
data.argc = 4;
data.argv = argv;
data.status = &status;
data.after_hook = cr_user_font_face_render_glyph_func_after;
data.after_hook_data = extents;
rb_cairo__invoke_callback (cr_user_font_face_invoke_func, (VALUE)&data);
}
return status;
}