static void
_cairo_scaled_font_init_key (cairo_scaled_font_t *scaled_font,
cairo_font_face_t *font_face,
const cairo_matrix_t *font_matrix,
const cairo_matrix_t *ctm,
const cairo_font_options_t *options)
{
uint32_t hash = FNV1_32_INIT;
scaled_font->status = CAIRO_STATUS_SUCCESS;
scaled_font->font_face = font_face;
scaled_font->font_matrix = *font_matrix;
scaled_font->ctm = *ctm;
scaled_font->options = *options;
/* We do a bytewise hash on the font matrices, ignoring the
* translation values in the ctm */
hash = _hash_bytes_fnv ((unsigned char *)(&scaled_font->font_matrix.xx),
sizeof(cairo_matrix_t), hash);
hash = _hash_bytes_fnv ((unsigned char *)(&scaled_font->ctm.xx),
sizeof(double) * 4, hash);
hash ^= (unsigned long) scaled_font->font_face;
hash ^= cairo_font_options_hash (&scaled_font->options);
scaled_font->hash_entry.hash = hash;
}
unsigned long FontOptions::hash()
{
return cairo_font_options_hash( mCairoFontOptions );
}
static long caml_cairo_font_options_hash(value v)
{
return(cairo_font_options_hash(FONT_OPTIONS_VAL(v)));
}
static VALUE
cr_options_hash (VALUE self)
{
return INT2NUM (cairo_font_options_hash (_SELF (self)));
}