diff options
Diffstat (limited to 'gfx/harfbuzz/src/hb-shaper-private.hh')
| -rw-r--r-- | gfx/harfbuzz/src/hb-shaper-private.hh | 108 |
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 */ |