void
_cairo_scaled_glyph_set_path (cairo_scaled_glyph_t *scaled_glyph,
cairo_scaled_font_t *scaled_font,
cairo_path_fixed_t *path)
{
if (scaled_glyph->path != NULL)
_cairo_path_fixed_destroy (scaled_glyph->path);
scaled_glyph->path = path;
}
static void
_cairo_scaled_glyph_fini (cairo_scaled_glyph_t *scaled_glyph)
{
cairo_scaled_font_t *scaled_font = scaled_glyph->scaled_font;
const cairo_surface_backend_t *surface_backend = scaled_font->surface_backend;
if (surface_backend != NULL && surface_backend->scaled_glyph_fini != NULL)
surface_backend->scaled_glyph_fini (scaled_glyph, scaled_font);
if (scaled_glyph->surface != NULL)
cairo_surface_destroy (&scaled_glyph->surface->base);
if (scaled_glyph->path != NULL)
_cairo_path_fixed_destroy (scaled_glyph->path);
}
static cairo_int_status_t
_cairo_user_scaled_glyph_init (void *abstract_font,
cairo_scaled_glyph_t *scaled_glyph,
cairo_scaled_glyph_info_t info)
{
cairo_int_status_t status = CAIRO_STATUS_SUCCESS;
cairo_user_scaled_font_t *scaled_font = abstract_font;
cairo_surface_t *meta_surface = scaled_glyph->meta_surface;
if (!scaled_glyph->meta_surface) {
cairo_user_font_face_t *face =
(cairo_user_font_face_t *) scaled_font->base.font_face;
cairo_text_extents_t extents = scaled_font->default_glyph_extents;
cairo_t *cr;
cr = _cairo_user_scaled_font_create_meta_context (scaled_font);
if (face->scaled_font_methods.render_glyph)
status = face->scaled_font_methods.render_glyph ((cairo_scaled_font_t *)scaled_font,
_cairo_scaled_glyph_index(scaled_glyph),
cr, &extents);
else
status = CAIRO_STATUS_USER_FONT_ERROR;
if (status == CAIRO_STATUS_SUCCESS)
status = cairo_status (cr);
meta_surface = cairo_surface_reference (cairo_get_target (cr));
cairo_destroy (cr);
if (status) {
cairo_surface_destroy (meta_surface);
return status;
}
_cairo_scaled_glyph_set_meta_surface (scaled_glyph,
&scaled_font->base,
meta_surface);
/* set metrics */
if (extents.width == 0.) {
/* Compute extents.x/y/width/height from meta_surface, in font space */
cairo_box_t bbox;
double x1, y1, x2, y2;
double x_scale, y_scale;
cairo_surface_t *null_surface;
cairo_surface_t *analysis_surface;
null_surface = _cairo_null_surface_create (cairo_surface_get_content (meta_surface));
analysis_surface = _cairo_analysis_surface_create (null_surface, -1, -1);
cairo_surface_destroy (null_surface);
_cairo_analysis_surface_set_ctm (analysis_surface, &scaled_font->extent_scale);
status = _cairo_meta_surface_replay (meta_surface, analysis_surface);
_cairo_analysis_surface_get_bounding_box (analysis_surface, &bbox);
cairo_surface_destroy (analysis_surface);
if (status)
return status;
_cairo_box_to_doubles (&bbox, &x1, &y1, &x2, &y2);
x_scale = scaled_font->extent_x_scale;
y_scale = scaled_font->extent_y_scale;
extents.x_bearing = x1 * x_scale;
extents.y_bearing = y1 * y_scale;
extents.width = (x2 - x1) * x_scale;
extents.height = (y2 - y1) * y_scale;
}
if (scaled_font->base.options.hint_metrics != CAIRO_HINT_METRICS_OFF) {
extents.x_advance = _cairo_lround (extents.x_advance / scaled_font->snap_x_scale) * scaled_font->snap_x_scale;
extents.y_advance = _cairo_lround (extents.y_advance / scaled_font->snap_y_scale) * scaled_font->snap_y_scale;
}
_cairo_scaled_glyph_set_metrics (scaled_glyph,
&scaled_font->base,
&extents);
}
if (info & CAIRO_SCALED_GLYPH_INFO_SURFACE) {
cairo_surface_t *surface;
cairo_status_t status = CAIRO_STATUS_SUCCESS;
cairo_format_t format;
int width, height;
/* TODO
* extend the glyph cache to support argb glyphs.
* need to figure out the semantics and interaction with subpixel
* rendering first.
*/
width = _cairo_fixed_integer_ceil (scaled_glyph->bbox.p2.x) -
_cairo_fixed_integer_floor (scaled_glyph->bbox.p1.x);
height = _cairo_fixed_integer_ceil (scaled_glyph->bbox.p2.y) -
_cairo_fixed_integer_floor (scaled_glyph->bbox.p1.y);
switch (scaled_font->base.options.antialias) {
default:
case CAIRO_ANTIALIAS_DEFAULT:
case CAIRO_ANTIALIAS_GRAY: format = CAIRO_FORMAT_A8; break;
case CAIRO_ANTIALIAS_NONE: format = CAIRO_FORMAT_A1; break;
case CAIRO_ANTIALIAS_SUBPIXEL: format = CAIRO_FORMAT_ARGB32; break;
}
surface = cairo_image_surface_create (format, width, height);
cairo_surface_set_device_offset (surface,
- _cairo_fixed_integer_floor (scaled_glyph->bbox.p1.x),
- _cairo_fixed_integer_floor (scaled_glyph->bbox.p1.y));
status = _cairo_meta_surface_replay (meta_surface, surface);
if (status) {
cairo_surface_destroy(surface);
return status;
}
_cairo_scaled_glyph_set_surface (scaled_glyph,
&scaled_font->base,
(cairo_image_surface_t *) surface);
}
if (info & CAIRO_SCALED_GLYPH_INFO_PATH) {
cairo_path_fixed_t *path = _cairo_path_fixed_create ();
if (!path)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
status = _cairo_meta_surface_get_path (meta_surface, path);
if (status) {
_cairo_path_fixed_destroy (path);
return status;
}
_cairo_scaled_glyph_set_path (scaled_glyph,
&scaled_font->base,
path);
}
return status;
}