summaryrefslogtreecommitdiffstats
path: root/gfx/harfbuzz/src/hb-shaper-private.hh
diff options
context:
space:
mode:
Diffstat (limited to 'gfx/harfbuzz/src/hb-shaper-private.hh')
-rw-r--r--gfx/harfbuzz/src/hb-shaper-private.hh108
1 files changed, 108 insertions, 0 deletions
diff --git a/gfx/harfbuzz/src/hb-shaper-private.hh b/gfx/harfbuzz/src/hb-shaper-private.hh
new file mode 100644
index 000000000..d1d1146da
--- /dev/null
+++ b/gfx/harfbuzz/src/hb-shaper-private.hh
@@ -0,0 +1,108 @@
+/*
+ * Copyright © 2012 Google, Inc.
+ *
+ * This is part of HarfBuzz, a text shaping library.
+ *
+ * Permission is hereby granted, without written agreement and without
+ * license or royalty fees, to use, copy, modify, and distribute this
+ * software and its documentation for any purpose, provided that the
+ * above copyright notice and the following two paragraphs appear in
+ * all copies of this software.
+ *
+ * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
+ * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
+ * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
+ * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
+ * DAMAGE.
+ *
+ * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
+ * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
+ * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
+ * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
+ *
+ * Google Author(s): Behdad Esfahbod
+ */
+
+#ifndef HB_SHAPER_PRIVATE_HH
+#define HB_SHAPER_PRIVATE_HH
+
+#include "hb-private.hh"
+
+typedef hb_bool_t hb_shape_func_t (hb_shape_plan_t *shape_plan,
+ hb_font_t *font,
+ hb_buffer_t *buffer,
+ const hb_feature_t *features,
+ unsigned int num_features);
+
+#define HB_SHAPER_IMPLEMENT(name) \
+ extern "C" HB_INTERNAL hb_shape_func_t _hb_##name##_shape;
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+
+struct hb_shaper_pair_t {
+ char name[16];
+ hb_shape_func_t *func;
+};
+
+HB_INTERNAL const hb_shaper_pair_t *
+_hb_shapers_get (void);
+
+
+/* For embedding in face / font / ... */
+struct hb_shaper_data_t {
+#define HB_SHAPER_IMPLEMENT(shaper) void *shaper;
+#include "hb-shaper-list.hh"
+#undef HB_SHAPER_IMPLEMENT
+};
+
+#define HB_SHAPERS_COUNT (sizeof (hb_shaper_data_t) / sizeof (void *))
+
+/* Means: succeeded, but don't need to keep any data. */
+#define HB_SHAPER_DATA_SUCCEEDED ((void *) +1)
+
+/* Means: tried but failed to create. */
+#define HB_SHAPER_DATA_INVALID ((void *) -1)
+#define HB_SHAPER_DATA_IS_INVALID(data) ((void *) (data) == HB_SHAPER_DATA_INVALID)
+
+#define HB_SHAPER_DATA_TYPE(shaper, object) struct hb_##shaper##_shaper_##object##_data_t
+#define HB_SHAPER_DATA_INSTANCE(shaper, object, instance) (* (HB_SHAPER_DATA_TYPE(shaper, object) **) &(instance)->shaper_data.shaper)
+#define HB_SHAPER_DATA(shaper, object) HB_SHAPER_DATA_INSTANCE (shaper, object, object)
+#define HB_SHAPER_DATA_CREATE_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_create
+#define HB_SHAPER_DATA_DESTROY_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_destroy
+
+#define HB_SHAPER_DATA_PROTOTYPE(shaper, object) \
+ HB_SHAPER_DATA_TYPE (shaper, object); /* Type forward declaration. */ \
+ extern "C" HB_INTERNAL HB_SHAPER_DATA_TYPE (shaper, object) * \
+ HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (hb_##object##_t *object HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS); \
+ extern "C" HB_INTERNAL void \
+ HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA_TYPE (shaper, object) *data)
+
+#define HB_SHAPER_DATA_DESTROY(shaper, object) \
+ if (HB_SHAPER_DATA_TYPE (shaper, object) *data = HB_SHAPER_DATA (shaper, object)) \
+ if (data != HB_SHAPER_DATA_INVALID && data != HB_SHAPER_DATA_SUCCEEDED) \
+ HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data);
+
+#define HB_SHAPER_DATA_ENSURE_DECLARE(shaper, object) \
+static inline bool \
+hb_##shaper##_shaper_##object##_data_ensure (hb_##object##_t *object) \
+{\
+ retry: \
+ HB_SHAPER_DATA_TYPE (shaper, object) *data = (HB_SHAPER_DATA_TYPE (shaper, object) *) hb_atomic_ptr_get (&HB_SHAPER_DATA (shaper, object)); \
+ if (unlikely (!data)) { \
+ data = HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (object); \
+ if (unlikely (!data)) \
+ data = (HB_SHAPER_DATA_TYPE (shaper, object) *) HB_SHAPER_DATA_INVALID; \
+ if (!hb_atomic_ptr_cmpexch (&HB_SHAPER_DATA (shaper, object), NULL, data)) { \
+ if (data && \
+ data != HB_SHAPER_DATA_INVALID && \
+ data != HB_SHAPER_DATA_SUCCEEDED) \
+ HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data); \
+ goto retry; \
+ } \
+ } \
+ return data != NULL && !HB_SHAPER_DATA_IS_INVALID (data); \
+}
+
+
+#endif /* HB_SHAPER_PRIVATE_HH */