cairo_status_t
_cairo_scaled_font_subsets_map_glyph (cairo_scaled_font_subsets_t *subsets,
cairo_scaled_font_t *scaled_font,
unsigned long scaled_font_glyph_index,
const char * utf8,
int utf8_len,
cairo_scaled_font_subsets_glyph_t *subset_glyph)
{
cairo_sub_font_t key, *sub_font;
cairo_scaled_glyph_t *scaled_glyph;
cairo_font_face_t *font_face;
cairo_matrix_t identity;
cairo_font_options_t font_options;
cairo_scaled_font_t *unscaled_font;
cairo_int_status_t status;
int max_glyphs;
cairo_bool_t type1_font;
/* Lookup glyph in unscaled subsets */
if (subsets->type != CAIRO_SUBSETS_SCALED) {
key.is_scaled = FALSE;
_cairo_sub_font_init_key (&key, scaled_font);
sub_font = _cairo_hash_table_lookup (subsets->unscaled_sub_fonts,
&key.base);
if (sub_font != NULL) {
status = _cairo_sub_font_lookup_glyph (sub_font,
scaled_font_glyph_index,
utf8, utf8_len,
subset_glyph);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
}
}
/* Lookup glyph in scaled subsets */
key.is_scaled = TRUE;
_cairo_sub_font_init_key (&key, scaled_font);
sub_font = _cairo_hash_table_lookup (subsets->scaled_sub_fonts,
&key.base);
if (sub_font != NULL) {
status = _cairo_sub_font_lookup_glyph (sub_font,
scaled_font_glyph_index,
utf8, utf8_len,
subset_glyph);
if (status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
}
/* Glyph not found. Determine whether the glyph is outline or
* bitmap and add to the appropriate subset.
*
* glyph_index 0 (the .notdef glyph) is a special case. Some fonts
* will return CAIRO_INT_STATUS_UNSUPPORTED when doing a
* _scaled_glyph_lookup(_GLYPH_INFO_PATH). Type1-fallback creates
* empty glyphs in this case so we can put the glyph in a unscaled
* subset. */
if (scaled_font_glyph_index == 0 ||
_cairo_font_face_is_user (scaled_font->font_face)) {
status = CAIRO_STATUS_SUCCESS;
} else {
_cairo_scaled_font_freeze_cache (scaled_font);
status = _cairo_scaled_glyph_lookup (scaled_font,
scaled_font_glyph_index,
CAIRO_SCALED_GLYPH_INFO_PATH,
&scaled_glyph);
_cairo_scaled_font_thaw_cache (scaled_font);
}
if (_cairo_int_status_is_error (status))
return status;
if (status == CAIRO_INT_STATUS_SUCCESS &&
subsets->type != CAIRO_SUBSETS_SCALED &&
! _cairo_font_face_is_user (scaled_font->font_face))
{
/* Path available. Add to unscaled subset. */
key.is_scaled = FALSE;
_cairo_sub_font_init_key (&key, scaled_font);
sub_font = _cairo_hash_table_lookup (subsets->unscaled_sub_fonts,
&key.base);
if (sub_font == NULL) {
font_face = cairo_scaled_font_get_font_face (scaled_font);
cairo_matrix_init_identity (&identity);
_cairo_font_options_init_default (&font_options);
cairo_font_options_set_hint_style (&font_options, CAIRO_HINT_STYLE_NONE);
cairo_font_options_set_hint_metrics (&font_options, CAIRO_HINT_METRICS_OFF);
unscaled_font = cairo_scaled_font_create (font_face,
&identity,
&identity,
&font_options);
if (unlikely (unscaled_font->status))
return unscaled_font->status;
subset_glyph->is_scaled = FALSE;
type1_font = _cairo_type1_scaled_font_is_type1 (unscaled_font);
if (subsets->type == CAIRO_SUBSETS_COMPOSITE && !type1_font) {
max_glyphs = MAX_GLYPHS_PER_COMPOSITE_FONT;
subset_glyph->is_composite = TRUE;
} else {
max_glyphs = MAX_GLYPHS_PER_SIMPLE_FONT;
subset_glyph->is_composite = FALSE;
}
status = _cairo_sub_font_create (subsets,
unscaled_font,
subsets->num_sub_fonts,
max_glyphs,
subset_glyph->is_scaled,
subset_glyph->is_composite,
&sub_font);
if (unlikely (status)) {
cairo_scaled_font_destroy (unscaled_font);
return status;
}
status = _cairo_hash_table_insert (subsets->unscaled_sub_fonts,
&sub_font->base);
if (unlikely (status)) {
_cairo_sub_font_destroy (sub_font);
return status;
}
if (!subsets->unscaled_sub_fonts_list)
subsets->unscaled_sub_fonts_list = sub_font;
else
subsets->unscaled_sub_fonts_list_end->next = sub_font;
subsets->unscaled_sub_fonts_list_end = sub_font;
subsets->num_sub_fonts++;
}
} else {
/* No path available. Add to scaled subset. */
key.is_scaled = TRUE;
_cairo_sub_font_init_key (&key, scaled_font);
sub_font = _cairo_hash_table_lookup (subsets->scaled_sub_fonts,
&key.base);
if (sub_font == NULL) {
subset_glyph->is_scaled = TRUE;
subset_glyph->is_composite = FALSE;
if (subsets->type == CAIRO_SUBSETS_SCALED)
max_glyphs = INT_MAX;
else
max_glyphs = MAX_GLYPHS_PER_SIMPLE_FONT;
status = _cairo_sub_font_create (subsets,
cairo_scaled_font_reference (scaled_font),
subsets->num_sub_fonts,
max_glyphs,
subset_glyph->is_scaled,
subset_glyph->is_composite,
&sub_font);
if (unlikely (status)) {
cairo_scaled_font_destroy (scaled_font);
return status;
}
status = _cairo_hash_table_insert (subsets->scaled_sub_fonts,
&sub_font->base);
if (unlikely (status)) {
_cairo_sub_font_destroy (sub_font);
return status;
}
if (!subsets->scaled_sub_fonts_list)
subsets->scaled_sub_fonts_list = sub_font;
else
subsets->scaled_sub_fonts_list_end->next = sub_font;
subsets->scaled_sub_fonts_list_end = sub_font;
subsets->num_sub_fonts++;
}
}
return _cairo_sub_font_map_glyph (sub_font,
scaled_font_glyph_index,
utf8, utf8_len,
subset_glyph);
}
void FontPlatformData::setOrientation(FontOrientation orientation)
{
ASSERT(m_scaledFont);
if (!m_scaledFont || (m_orientation == orientation))
return;
cairo_matrix_t transformationMatrix;
cairo_matrix_init_identity(&transformationMatrix);
cairo_matrix_t fontMatrix;
cairo_scaled_font_get_font_matrix(m_scaledFont, &fontMatrix);
cairo_font_options_t* options = getDefaultFontOptions();
// In case of vertical orientation, rotate the transformation matrix.
// Otherwise restore the horizontal orientation matrix.
if (orientation == Vertical)
rotateCairoMatrixForVerticalOrientation(&fontMatrix);
else
fontMatrix = m_horizontalOrientationMatrix;
cairo_font_face_t* fontFace = cairo_scaled_font_get_font_face(m_scaledFont);
cairo_scaled_font_destroy(m_scaledFont);
m_scaledFont = cairo_scaled_font_create(fontFace, &fontMatrix, &transformationMatrix, options);
cairo_font_options_destroy(options);
m_orientation = orientation;
}
static PyObject *
scaled_font_get_font_face (PycairoScaledFont *o)
{
return PycairoFontFace_FromFontFace (
cairo_font_face_reference (
cairo_scaled_font_get_font_face (o->scaled_font)));
}
static cairo_status_t font_init_cb (cairo_scaled_font_t *scaled_font,
cairo_t */*cairo*/, cairo_font_extents_t *metrics){
cairo_font_face_t* face;
face = cairo_scaled_font_get_font_face(scaled_font);
SvgFont* instance = (SvgFont*) cairo_font_face_get_user_data(face, &key);
return instance->scaled_font_init(scaled_font, metrics);
}
PassRefPtr<SimpleFontData> SimpleFontData::platformCreateScaledFontData(const FontDescription& fontDescription, float scaleFactor) const
{
ASSERT(m_platformData.scaledFont());
return SimpleFontData::create(FontPlatformData(cairo_scaled_font_get_font_face(m_platformData.scaledFont()),
scaleFactor * fontDescription.computedSize(),
m_platformData.syntheticBold(),
m_platformData.syntheticOblique()), isCustomFont(), false);
}
FontPlatformData::FontPlatformData(const FontPlatformData& other, float size)
{
*this = other;
// We need to reinitialize the instance, because the difference in size
// necessitates a new scaled font instance.
m_size = size;
initializeWithFontFace(cairo_scaled_font_get_font_face(m_scaledFont.get()));
}
static cairo_status_t font_render_glyph_cb (cairo_scaled_font_t *scaled_font,
unsigned long glyph,
cairo_t *cr,
cairo_text_extents_t *metrics){
cairo_font_face_t* face;
face = cairo_scaled_font_get_font_face(scaled_font);
SvgFont* instance = (SvgFont*) cairo_font_face_get_user_data(face, &key);
return instance->scaled_font_render_glyph(scaled_font, glyph, cr, metrics);
}
static cairo_status_t
cairo_type1_font_create (cairo_scaled_font_subset_t *scaled_font_subset,
cairo_type1_font_t **subset_return,
cairo_bool_t hex_encode)
{
cairo_type1_font_t *font;
cairo_font_face_t *font_face;
cairo_matrix_t font_matrix;
cairo_matrix_t ctm;
cairo_font_options_t font_options;
cairo_status_t status;
font = calloc (1, sizeof (cairo_type1_font_t));
if (font == NULL)
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
font->widths = calloc (scaled_font_subset->num_glyphs,
sizeof (int));
if (font->widths == NULL) {
free (font);
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
}
font->scaled_font_subset = scaled_font_subset;
font->hex_encode = hex_encode;
font_face = cairo_scaled_font_get_font_face (scaled_font_subset->scaled_font);
cairo_matrix_init_scale (&font_matrix, 1000, -1000);
cairo_matrix_init_identity (&ctm);
_cairo_font_options_init_default (&font_options);
cairo_font_options_set_hint_style (&font_options, CAIRO_HINT_STYLE_NONE);
cairo_font_options_set_hint_metrics (&font_options, CAIRO_HINT_METRICS_OFF);
font->type1_scaled_font = cairo_scaled_font_create (font_face,
&font_matrix,
&ctm,
&font_options);
status = font->type1_scaled_font->status;
if (status)
goto fail;
_cairo_array_init (&font->contents, sizeof (unsigned char));
font->output = NULL;
*subset_return = font;
return CAIRO_STATUS_SUCCESS;
fail:
free (font->widths);
free (font);
return status;
}
static cairo_quartz_font_face_t *
_cairo_quartz_scaled_to_face (void *abstract_font)
{
cairo_quartz_scaled_font_t *sfont = (cairo_quartz_scaled_font_t*) abstract_font;
cairo_font_face_t *font_face = cairo_scaled_font_get_font_face (&sfont->base);
if (!font_face || font_face->backend->type != CAIRO_FONT_TYPE_QUARTZ)
return NULL;
return (cairo_quartz_font_face_t*) font_face;
}
static cairo_status_t font_text_to_glyphs_cb ( cairo_scaled_font_t *scaled_font,
const char *utf8,
int utf8_len,
cairo_glyph_t **glyphs,
int *num_glyphs,
cairo_text_cluster_t **clusters,
int *num_clusters,
cairo_text_cluster_flags_t *flags){
cairo_font_face_t* face;
face = cairo_scaled_font_get_font_face(scaled_font);
SvgFont* instance = (SvgFont*) cairo_font_face_get_user_data(face, &key);
return instance->scaled_font_text_to_glyphs(scaled_font, utf8, utf8_len, glyphs, num_glyphs, clusters, num_clusters, flags);
}
static cairo_status_t
cr_user_font_face_unicode_to_glyph_func (cairo_scaled_font_t *scaled_font,
unsigned long unicode,
unsigned long *glyph_index)
{
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_unicode_to_glyph);
if (NIL_P (receiver) &&
rb_obj_respond_to (self, cr_id_unicode_to_glyph, Qtrue))
{
receiver = self;
id_method_name = cr_id_unicode_to_glyph;
}
if (NIL_P (receiver))
{
*glyph_index = unicode;
}
else
{
cr_user_font_face_invoke_data_t data;
VALUE argv[2];
argv[0] = CRSCALEDFONT2RVAL (scaled_font);
argv[1] = ULONG2NUM (unicode);
data.receiver = receiver;
data.method = id_method_name;
data.argc = 2;
data.argv = argv;
data.status = &status;
data.after_hook = cr_user_font_face_unicode_to_glyph_func_after;
data.after_hook_data = glyph_index;
rb_cairo__invoke_callback (cr_user_font_face_invoke_func, (VALUE)&data);
}
return status;
}
static cairo_status_t
twin_scaled_font_compute_properties (cairo_scaled_font_t *scaled_font,
cairo_t *cr)
{
cairo_status_t status;
twin_scaled_properties_t *props;
props = malloc (sizeof (twin_scaled_properties_t));
if (unlikely (props == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
props->face_props = cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),
&twin_properties_key);
props->snap = scaled_font->options.hint_style > CAIRO_HINT_STYLE_NONE;
/* weight */
props->weight = props->face_props->weight * (F (4) / TWIN_WEIGHT_NORMAL);
/* pen & margins */
props->penx = props->peny = props->weight;
props->marginl = props->marginr = F (4);
if (scaled_font->options.hint_style > CAIRO_HINT_STYLE_SLIGHT)
twin_hint_pen_and_margins(cr,
&props->penx, &props->peny,
&props->marginl, &props->marginr);
/* stretch */
props->stretch = 1 + .1 * ((int) props->face_props->stretch - (int) TWIN_STRETCH_NORMAL);
/* Save it */
status = cairo_scaled_font_set_user_data (scaled_font,
&twin_properties_key,
props, free);
if (unlikely (status))
goto FREE_PROPS;
return CAIRO_STATUS_SUCCESS;
FREE_PROPS:
free (props);
return status;
}
SkTypeface* SkCreateTypefaceFromCairoFTFontWithFontconfig(cairo_scaled_font_t* scaledFont, FcPattern* pattern)
{
cairo_font_face_t* fontFace = cairo_scaled_font_get_font_face(scaledFont);
SkASSERT(cairo_font_face_status(fontFace) == CAIRO_STATUS_SUCCESS);
SkTypeface* typeface = reinterpret_cast<SkTypeface*>(cairo_font_face_get_user_data(fontFace, &kSkTypefaceKey));
if (typeface) {
typeface->ref();
} else {
CairoLockedFTFace faceLock(scaledFont);
if (FT_Face face = faceLock.getFace()) {
typeface = SkCairoFTTypeface::CreateTypeface(fontFace, face, pattern);
SkTypefaceCache::Add(typeface, typeface->fontStyle());
}
}
return typeface;
}
static cairo_status_t
test_scaled_font_unicode_to_glyph (cairo_scaled_font_t *scaled_font,
unsigned long unicode,
unsigned long *glyph)
{
test_scaled_font_glyph_t *glyphs = cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),
&test_font_face_glyphs_key);
int i;
for (i = 0; glyphs[i].ucs4 != (unsigned long) -1; i++)
if (glyphs[i].ucs4 == unicode) {
*glyph = i;
return CAIRO_STATUS_SUCCESS;
}
/* Not found. Default to glyph 0 */
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
test_scaled_font_init (cairo_scaled_font_t *scaled_font,
cairo_t *cr,
cairo_font_extents_t *extents)
{
cairo_set_font_face (cr,
cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),
&fallback_font_key));
cairo_scaled_font_set_user_data (scaled_font,
&fallback_font_key,
cairo_scaled_font_reference (cairo_get_scaled_font (cr)),
(cairo_destroy_func_t) cairo_scaled_font_destroy);
cairo_font_extents (cr, extents);
return CAIRO_STATUS_SUCCESS;
}
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;
}
static cairo_status_t
test_scaled_font_render_glyph (cairo_scaled_font_t *scaled_font,
unsigned long glyph,
cairo_t *cr,
cairo_text_extents_t *extents)
{
cairo_glyph_t cairo_glyph;
cairo_glyph.index = glyph;
cairo_glyph.x = 0;
cairo_glyph.y = 0;
cairo_set_font_face (cr,
cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),
&fallback_font_key));
cairo_show_glyphs (cr, &cairo_glyph, 1);
cairo_glyph_extents (cr, &cairo_glyph, 1, extents);
return CAIRO_STATUS_SUCCESS;
}
static cairo_status_t
test_scaled_font_render_glyph (cairo_scaled_font_t *scaled_font,
unsigned long glyph,
cairo_t *cr,
cairo_text_extents_t *metrics)
{
test_scaled_font_glyph_t *glyphs = cairo_font_face_get_user_data (cairo_scaled_font_get_font_face (scaled_font),
&test_font_face_glyphs_key);
int i;
unsigned char *data;
cairo_surface_t *image;
cairo_pattern_t *pattern;
cairo_matrix_t matrix;
uint8_t byte;
/* FIXME: We simply crash on out-of-bound glyph indices */
metrics->x_advance = (glyphs[glyph].width + 1) / 8.0;
image = cairo_image_surface_create (CAIRO_FORMAT_A1, glyphs[glyph].width, 8);
data = cairo_image_surface_get_data (image);
for (i = 0; i < 8; i++) {
byte = glyphs[glyph].data[i];
*data = CAIRO_BITSWAP8_IF_LITTLE_ENDIAN (byte);
data += cairo_image_surface_get_stride (image);
}
pattern = cairo_pattern_create_for_surface (image);
cairo_matrix_init_identity (&matrix);
cairo_matrix_scale (&matrix, 1.0/8.0, 1.0/8.0);
cairo_matrix_translate (&matrix, 0, -8);
cairo_matrix_invert (&matrix);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_set_source (cr, pattern);
cairo_mask (cr, pattern);
cairo_pattern_destroy (pattern);
cairo_surface_destroy (image);
return CAIRO_STATUS_SUCCESS;
}
cairo_private cairo_status_t
_cairo_scaled_font_subsets_map_glyph (cairo_scaled_font_subsets_t *subsets,
cairo_scaled_font_t *scaled_font,
unsigned long scaled_font_glyph_index,
cairo_scaled_font_subsets_glyph_t *subset_glyph)
{
cairo_sub_font_t key, *sub_font;
cairo_scaled_glyph_t *scaled_glyph;
cairo_font_face_t *font_face;
cairo_matrix_t identity;
cairo_font_options_t font_options;
cairo_scaled_font_t *unscaled_font;
cairo_status_t status;
int max_glyphs;
cairo_bool_t type1_font;
/* Lookup glyph in unscaled subsets */
if (subsets->type != CAIRO_SUBSETS_SCALED) {
key.is_scaled = FALSE;
_cairo_sub_font_init_key (&key, scaled_font);
if (_cairo_hash_table_lookup (subsets->unscaled_sub_fonts, &key.base,
(cairo_hash_entry_t **) &sub_font))
{
status = _cairo_sub_font_lookup_glyph (sub_font,
scaled_font_glyph_index,
subset_glyph);
if (status == CAIRO_STATUS_SUCCESS)
return CAIRO_STATUS_SUCCESS;
}
}
/* Lookup glyph in scaled subsets */
key.is_scaled = TRUE;
_cairo_sub_font_init_key (&key, scaled_font);
if (_cairo_hash_table_lookup (subsets->scaled_sub_fonts, &key.base,
(cairo_hash_entry_t **) &sub_font))
{
status = _cairo_sub_font_lookup_glyph (sub_font,
scaled_font_glyph_index,
subset_glyph);
if (status == CAIRO_STATUS_SUCCESS)
return CAIRO_STATUS_SUCCESS;
}
/* Glyph not found. Determine whether the glyph is outline or
* bitmap and add to the appropriate subset */
status = _cairo_scaled_glyph_lookup (scaled_font,
scaled_font_glyph_index,
CAIRO_SCALED_GLYPH_INFO_PATH,
&scaled_glyph);
if (status && status != CAIRO_INT_STATUS_UNSUPPORTED)
return status;
if (status == 0 && subsets->type != CAIRO_SUBSETS_SCALED) {
/* Path available. Add to unscaled subset. */
key.is_scaled = FALSE;
_cairo_sub_font_init_key (&key, scaled_font);
if (! _cairo_hash_table_lookup (subsets->unscaled_sub_fonts, &key.base,
(cairo_hash_entry_t **) &sub_font))
{
font_face = cairo_scaled_font_get_font_face (scaled_font);
cairo_matrix_init_identity (&identity);
_cairo_font_options_init_default (&font_options);
cairo_font_options_set_hint_style (&font_options, CAIRO_HINT_STYLE_NONE);
cairo_font_options_set_hint_metrics (&font_options, CAIRO_HINT_METRICS_OFF);
unscaled_font = cairo_scaled_font_create (font_face,
&identity,
&identity,
&font_options);
if (unscaled_font->status)
return unscaled_font->status;
subset_glyph->is_scaled = FALSE;
type1_font = FALSE;
#if CAIRO_HAS_FT_FONT
type1_font = _cairo_type1_scaled_font_is_type1 (unscaled_font);
#endif
if (subsets->type == CAIRO_SUBSETS_COMPOSITE && !type1_font) {
max_glyphs = MAX_GLYPHS_PER_COMPOSITE_FONT;
subset_glyph->is_composite = TRUE;
} else {
max_glyphs = MAX_GLYPHS_PER_SIMPLE_FONT;
subset_glyph->is_composite = FALSE;
}
sub_font = _cairo_sub_font_create (subsets,
unscaled_font,
subsets->num_sub_fonts++,
max_glyphs,
subset_glyph->is_scaled,
subset_glyph->is_composite);
if (sub_font == NULL) {
cairo_scaled_font_destroy (unscaled_font);
return CAIRO_STATUS_NO_MEMORY;
}
status = _cairo_hash_table_insert (subsets->unscaled_sub_fonts,
&sub_font->base);
if (status) {
_cairo_sub_font_destroy (sub_font);
return status;
}
}
} else {
/* No path available. Add to scaled subset. */
key.is_scaled = TRUE;
_cairo_sub_font_init_key (&key, scaled_font);
if (! _cairo_hash_table_lookup (subsets->scaled_sub_fonts, &key.base,
(cairo_hash_entry_t **) &sub_font))
{
subset_glyph->is_scaled = TRUE;
subset_glyph->is_composite = FALSE;
if (subsets->type == CAIRO_SUBSETS_SCALED)
max_glyphs = INT_MAX;
else
max_glyphs = MAX_GLYPHS_PER_SIMPLE_FONT;
sub_font = _cairo_sub_font_create (subsets,
cairo_scaled_font_reference (scaled_font),
subsets->num_sub_fonts++,
max_glyphs,
subset_glyph->is_scaled,
subset_glyph->is_composite);
if (sub_font == NULL) {
cairo_scaled_font_destroy (scaled_font);
return CAIRO_STATUS_NO_MEMORY;
}
status = _cairo_hash_table_insert (subsets->scaled_sub_fonts,
&sub_font->base);
if (status) {
_cairo_sub_font_destroy (sub_font);
return status;
}
}
}
return _cairo_sub_font_map_glyph (sub_font,
scaled_font_glyph_index,
subset_glyph);
}
static cairo_status_t
cr_user_font_face_text_to_glyphs_func (cairo_scaled_font_t *scaled_font,
const char *utf8, int utf8_len,
cairo_glyph_t **glyphs, int *num_glyphs,
cairo_text_cluster_t **clusters,
int *num_clusters,
cairo_text_cluster_flags_t *cluster_flags)
{
cairo_status_t status = CAIRO_INT_STATUS_UNSUPPORTED;
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_text_to_glyphs);
if (NIL_P (receiver) && rb_obj_respond_to (self, cr_id_text_to_glyphs, Qtrue))
{
receiver = self;
id_method_name = cr_id_text_to_glyphs;
}
if (NIL_P (receiver))
{
if (num_glyphs)
*num_glyphs = -1;
}
else
{
cr_user_font_face_invoke_data_t data;
cr_text_to_glyphs_after_hook_data_t after_hook_data;
VALUE text_to_glyphs_data;
VALUE argv[3];
argv[0] = CRSCALEDFONT2RVAL (scaled_font);
argv[1] = rb_str_new (utf8, utf8_len);
text_to_glyphs_data = rb_funcall (rb_cCairo_UserFontFace_TextToGlyphsData,
cr_id_new,
3,
CBOOL2RVAL (glyphs != NULL),
CBOOL2RVAL (clusters != NULL),
CBOOL2RVAL (cluster_flags != NULL));
argv[2] = text_to_glyphs_data;
data.receiver = receiver;
data.method = id_method_name;
data.argc = 3;
data.argv = argv;
data.status = &status;
data.after_hook = cr_user_font_face_text_to_glyphs_func_after;
data.after_hook_data = &after_hook_data;
after_hook_data.text_to_glyphs_data = text_to_glyphs_data;
after_hook_data.glyphs = glyphs;
after_hook_data.num_glyphs = num_glyphs;
after_hook_data.clusters = clusters;
after_hook_data.num_clusters = num_clusters;
after_hook_data.cluster_flags = cluster_flags;
rb_cairo__invoke_callback (cr_user_font_face_invoke_func, (VALUE)&data);
}
return status;
}
PRUint32
gfxFT2FontBase::GetGlyph(PRUint32 aCharCode)
{
// FcFreeTypeCharIndex needs to lock the FT_Face and can end up searching
// through all the postscript glyph names in the font. Therefore use a
// lightweight cache, which is stored on the cairo_font_face_t.
cairo_font_face_t *face =
cairo_scaled_font_get_font_face(CairoScaledFont());
if (cairo_font_face_status(face) != CAIRO_STATUS_SUCCESS)
return 0;
// This cache algorithm and size is based on what is done in
// cairo_scaled_font_text_to_glyphs and pango_fc_font_real_get_glyph. I
// think the concept is that adjacent characters probably come mostly from
// one Unicode block. This assumption is probably not so valid with
// scripts with large character sets as used for East Asian languages.
struct CmapCacheSlot {
PRUint32 mCharCode;
PRUint32 mGlyphIndex;
};
const PRUint32 kNumSlots = 256;
static cairo_user_data_key_t sCmapCacheKey;
CmapCacheSlot *slots = static_cast<CmapCacheSlot*>
(cairo_font_face_get_user_data(face, &sCmapCacheKey));
if (!slots) {
// cairo's caches can keep some cairo_font_faces alive past our last
// destroy, so the destroy function (free) for the cache must be
// callable from cairo without any assumptions about what other
// modules have not been shutdown.
slots = static_cast<CmapCacheSlot*>
(calloc(kNumSlots, sizeof(CmapCacheSlot)));
if (!slots)
return 0;
cairo_status_t status =
cairo_font_face_set_user_data(face, &sCmapCacheKey, slots, free);
if (status != CAIRO_STATUS_SUCCESS) { // OOM
free(slots);
return 0;
}
// Invalidate slot 0 by setting its char code to something that would
// never end up in slot 0. All other slots are already invalid
// because they have mCharCode = 0 and a glyph for char code 0 will
// always be in the slot 0.
slots[0].mCharCode = 1;
}
CmapCacheSlot *slot = &slots[aCharCode % kNumSlots];
if (slot->mCharCode != aCharCode) {
slot->mCharCode = aCharCode;
slot->mGlyphIndex = gfxFT2LockedFace(this).GetGlyph(aCharCode);
}
return slot->mGlyphIndex;
}
FontFace* ScaledFont::getFontFace()
{
return new FontFace( cairo_scaled_font_get_font_face( mCairoScaledFont ) );
}
