/*
- * Copyright (C) 2009 Red Hat, Inc.
+ * Copyright © 2009 Red Hat, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
* Red Hat Author(s): Behdad Esfahbod
*/
-#include "hb-private.h"
+#include "hb-private.hh"
#include "hb-shape.h"
#include "hb-buffer-private.hh"
-#include "hb-ot-shape.h"
-
#ifdef HAVE_GRAPHITE
-#include "hb-graphite.h"
+#include "hb-graphite2-private.hh"
+#endif
+#ifdef HAVE_UNISCRIBE
+# include "hb-uniscribe-private.hh"
+#endif
+#ifdef HAVE_OT
+# include "hb-ot-shape-private.hh"
+#endif
+#include "hb-fallback-shape-private.hh"
+
+typedef hb_bool_t (*hb_shape_func_t) (hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features);
+
+#define HB_SHAPER_IMPLEMENT(name) {#name, _hb_##name##_shape}
+static const struct hb_shaper_pair_t {
+ char name[16];
+ hb_shape_func_t func;
+} all_shapers[] = {
+ /* v--- Add new shapers in the right place here */
+#ifdef HAVE_GRAPHITE
+ HB_SHAPER_IMPLEMENT (graphite2),
+#endif
+#ifdef HAVE_UNISCRIBE
+ HB_SHAPER_IMPLEMENT (uniscribe),
#endif
+#ifdef HAVE_OT
+ HB_SHAPER_IMPLEMENT (ot),
+#endif
+ HB_SHAPER_IMPLEMENT (fallback) /* should be last */
+};
+#undef HB_SHAPER_IMPLEMENT
+
+
+/* Thread-safe, lock-free, shapers */
-HB_BEGIN_DECLS
+static hb_shaper_pair_t *static_shapers;
+static
+void free_static_shapers (void)
+{
+ if (unlikely (static_shapers != all_shapers))
+ free (static_shapers);
+}
-static void
-hb_shape_internal (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- const hb_feature_t *features,
- unsigned int num_features)
+static const hb_shaper_pair_t *
+get_shapers (void)
{
-#if 0 && defined(HAVE_GRAPHITE)
- hb_blob_t *silf_blob;
- silf_blob = hb_face_get_table (face, HB_GRAPHITE_TAG_Silf);
- if (hb_blob_get_length(silf_blob))
+retry:
+ hb_shaper_pair_t *shapers = (hb_shaper_pair_t *) hb_atomic_ptr_get (&static_shapers);
+
+ if (unlikely (!shapers))
{
- hb_graphite_shape(font, face, buffer, features, num_features);
- hb_blob_destroy(silf_blob);
- return;
- }
- hb_blob_destroy(silf_blob);
+ char *env = getenv ("HB_SHAPER_LIST");
+ if (!env || !*env) {
+ hb_atomic_ptr_cmpexch (&static_shapers, NULL, (const hb_shaper_pair_t *) all_shapers);
+ return (const hb_shaper_pair_t *) all_shapers;
+ }
+
+ /* Not found; allocate one. */
+ shapers = (hb_shaper_pair_t *) malloc (sizeof (all_shapers));
+ if (unlikely (!shapers))
+ return (const hb_shaper_pair_t *) all_shapers;
+ memcpy (shapers, all_shapers, sizeof (all_shapers));
+
+ /* Reorder shaper list to prefer requested shapers. */
+ unsigned int i = 0;
+ char *end, *p = env;
+ for (;;) {
+ end = strchr (p, ',');
+ if (!end)
+ end = p + strlen (p);
+
+ for (unsigned int j = i; j < ARRAY_LENGTH (all_shapers); j++)
+ if (end - p == (int) strlen (shapers[j].name) &&
+ 0 == strncmp (shapers[j].name, p, end - p))
+ {
+ /* Reorder this shaper to position i */
+ struct hb_shaper_pair_t t = shapers[j];
+ memmove (&shapers[i + 1], &shapers[i], sizeof (shapers[i]) * (j - i));
+ shapers[i] = t;
+ i++;
+ }
+
+ if (!*end)
+ break;
+ else
+ p = end + 1;
+ }
+
+ if (!hb_atomic_ptr_cmpexch (&static_shapers, NULL, shapers)) {
+ free (shapers);
+ goto retry;
+ }
+
+#ifdef HAVE_ATEXIT
+ atexit (free_static_shapers); /* First person registers atexit() callback. */
#endif
+ }
- hb_ot_shape (font, face, buffer, features, num_features);
+ return shapers;
}
-void
-hb_shape (hb_font_t *font,
- hb_face_t *face,
- hb_buffer_t *buffer,
- const hb_feature_t *features,
- unsigned int num_features)
+
+static const char **static_shaper_list;
+
+static
+void free_static_shaper_list (void)
+{
+ free (static_shaper_list);
+}
+
+const char **
+hb_shape_list_shapers (void)
{
- hb_segment_properties_t orig_props;
-
- orig_props = buffer->props;
-
- /* If script is set to INVALID, guess from buffer contents */
- if (buffer->props.script == HB_SCRIPT_INVALID) {
- hb_unicode_get_script_func_t get_script = buffer->unicode->v.get_script;
- unsigned int count = buffer->len;
- for (unsigned int i = 0; i < count; i++) {
- hb_script_t script = get_script (buffer->info[i].codepoint);
- if (likely (script != HB_SCRIPT_COMMON &&
- script != HB_SCRIPT_INHERITED &&
- script != HB_SCRIPT_UNKNOWN)) {
- buffer->props.script = script;
- break;
- }
+retry:
+ const char **shaper_list = (const char **) hb_atomic_ptr_get (&static_shaper_list);
+
+ if (unlikely (!shaper_list))
+ {
+ /* Not found; allocate one. */
+ shaper_list = (const char **) calloc (1 + ARRAY_LENGTH (all_shapers), sizeof (const char *));
+ if (unlikely (!shaper_list)) {
+ static const char *nil_shaper_list[] = {NULL};
+ return nil_shaper_list;
}
- }
- /* If direction is set to INVALID, guess from script */
- if (buffer->props.direction == HB_DIRECTION_INVALID) {
- buffer->props.direction = hb_script_get_horizontal_direction (buffer->props.script);
- }
+ const hb_shaper_pair_t *shapers = get_shapers ();
+ unsigned int i;
+ for (i = 0; i < ARRAY_LENGTH (all_shapers); i++)
+ shaper_list[i] = shapers[i].name;
+ shaper_list[i] = NULL;
- /* If language is not set, use default language from locale */
- if (buffer->props.language == NULL) {
- /* TODO get_default_for_script? using $LANGUAGE */
- //buffer->props.language = hb_language_get_default ();
- }
+ if (!hb_atomic_ptr_cmpexch (&static_shaper_list, NULL, shaper_list)) {
+ free (shaper_list);
+ goto retry;
+ }
- hb_shape_internal (font, face, buffer, features, num_features);
+#ifdef HAVE_ATEXIT
+ atexit (free_static_shaper_list); /* First person registers atexit() callback. */
+#endif
+ }
- buffer->props = orig_props;
+ return shaper_list;
}
-HB_END_DECLS
+hb_bool_t
+hb_shape_full (hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features,
+ const char * const *shaper_list)
+{
+ hb_font_make_immutable (font); /* So we can safely cache stuff on it */
+
+ if (likely (!shaper_list)) {
+ const hb_shaper_pair_t *shapers = get_shapers ();
+ for (unsigned int i = 0; i < ARRAY_LENGTH (all_shapers); i++)
+ if (likely (shapers[i].func (font, buffer, features, num_features)))
+ return true;
+ } else {
+ while (*shaper_list) {
+ for (unsigned int i = 0; i < ARRAY_LENGTH (all_shapers); i++)
+ if (0 == strcmp (*shaper_list, all_shapers[i].name)) {
+ if (likely (all_shapers[i].func (font, buffer, features, num_features)))
+ return true;
+ break;
+ }
+ shaper_list++;
+ }
+ }
+ return false;
+}
+
+void
+hb_shape (hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features)
+{
+ hb_shape_full (font, buffer, features, num_features, NULL);
+}
projects / framework / uifw / harfbuzz.git / blobdiff