1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/harfbuzz/src/hb-shaper-private.hh Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,109 @@
1.4 +/*
1.5 + * Copyright © 2012 Google, Inc.
1.6 + *
1.7 + * This is part of HarfBuzz, a text shaping library.
1.8 + *
1.9 + * Permission is hereby granted, without written agreement and without
1.10 + * license or royalty fees, to use, copy, modify, and distribute this
1.11 + * software and its documentation for any purpose, provided that the
1.12 + * above copyright notice and the following two paragraphs appear in
1.13 + * all copies of this software.
1.14 + *
1.15 + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
1.16 + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
1.17 + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
1.18 + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
1.19 + * DAMAGE.
1.20 + *
1.21 + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
1.22 + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
1.23 + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
1.24 + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
1.25 + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
1.26 + *
1.27 + * Google Author(s): Behdad Esfahbod
1.28 + */
1.29 +
1.30 +#ifndef HB_SHAPER_PRIVATE_HH
1.31 +#define HB_SHAPER_PRIVATE_HH
1.32 +
1.33 +#include "hb-private.hh"
1.34 +
1.35 +typedef hb_bool_t hb_shape_func_t (hb_shape_plan_t *shape_plan,
1.36 + hb_font_t *font,
1.37 + hb_buffer_t *buffer,
1.38 + const hb_feature_t *features,
1.39 + unsigned int num_features);
1.40 +
1.41 +#define HB_SHAPER_IMPLEMENT(name) \
1.42 + extern "C" HB_INTERNAL hb_shape_func_t _hb_##name##_shape;
1.43 +#include "hb-shaper-list.hh"
1.44 +#undef HB_SHAPER_IMPLEMENT
1.45 +
1.46 +struct hb_shaper_pair_t {
1.47 + char name[16];
1.48 + hb_shape_func_t *func;
1.49 +};
1.50 +
1.51 +HB_INTERNAL const hb_shaper_pair_t *
1.52 +_hb_shapers_get (void);
1.53 +
1.54 +
1.55 +/* For embedding in face / font / ... */
1.56 +struct hb_shaper_data_t {
1.57 +#define HB_SHAPER_IMPLEMENT(shaper) void *shaper;
1.58 +#include "hb-shaper-list.hh"
1.59 +#undef HB_SHAPER_IMPLEMENT
1.60 +};
1.61 +
1.62 +#define HB_SHAPERS_COUNT (sizeof (hb_shaper_data_t) / sizeof (void *))
1.63 +
1.64 +/* Means: succeeded, but don't need to keep any data. */
1.65 +#define HB_SHAPER_DATA_SUCCEEDED ((void *) +1)
1.66 +
1.67 +/* Means: tried but failed to create. */
1.68 +#define HB_SHAPER_DATA_INVALID ((void *) -1)
1.69 +#define HB_SHAPER_DATA_IS_INVALID(data) ((void *) (data) == HB_SHAPER_DATA_INVALID)
1.70 +
1.71 +#define HB_SHAPER_DATA_TYPE(shaper, object) struct hb_##shaper##_shaper_##object##_data_t
1.72 +#define HB_SHAPER_DATA_INSTANCE(shaper, object, instance) (* (HB_SHAPER_DATA_TYPE(shaper, object) **) &(instance)->shaper_data.shaper)
1.73 +#define HB_SHAPER_DATA(shaper, object) HB_SHAPER_DATA_INSTANCE (shaper, object, object)
1.74 +#define HB_SHAPER_DATA_CREATE_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_create
1.75 +#define HB_SHAPER_DATA_DESTROY_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_destroy
1.76 +
1.77 +#define HB_SHAPER_DATA_PROTOTYPE(shaper, object) \
1.78 + HB_SHAPER_DATA_TYPE (shaper, object); /* Type forward declaration. */ \
1.79 + extern "C" HB_INTERNAL HB_SHAPER_DATA_TYPE (shaper, object) * \
1.80 + HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (hb_##object##_t *object HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS); \
1.81 + extern "C" HB_INTERNAL void \
1.82 + HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA_TYPE (shaper, object) *data)
1.83 +
1.84 +#define HB_SHAPER_DATA_DESTROY(shaper, object) \
1.85 + if (object->shaper_data.shaper && \
1.86 + object->shaper_data.shaper != HB_SHAPER_DATA_INVALID && \
1.87 + object->shaper_data.shaper != HB_SHAPER_DATA_SUCCEEDED) \
1.88 + HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA (shaper, object));
1.89 +
1.90 +#define HB_SHAPER_DATA_ENSURE_DECLARE(shaper, object) \
1.91 +static inline bool \
1.92 +hb_##shaper##_shaper_##object##_data_ensure (hb_##object##_t *object) \
1.93 +{\
1.94 + retry: \
1.95 + HB_SHAPER_DATA_TYPE (shaper, object) *data = (HB_SHAPER_DATA_TYPE (shaper, object) *) hb_atomic_ptr_get (&HB_SHAPER_DATA (shaper, object)); \
1.96 + if (unlikely (!data)) { \
1.97 + data = HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (object); \
1.98 + if (unlikely (!data)) \
1.99 + data = (HB_SHAPER_DATA_TYPE (shaper, object) *) HB_SHAPER_DATA_INVALID; \
1.100 + if (!hb_atomic_ptr_cmpexch (&HB_SHAPER_DATA (shaper, object), NULL, data)) { \
1.101 + if (data && \
1.102 + data != HB_SHAPER_DATA_INVALID && \
1.103 + data != HB_SHAPER_DATA_SUCCEEDED) \
1.104 + HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data); \
1.105 + goto retry; \
1.106 + } \
1.107 + } \
1.108 + return data != NULL && !HB_SHAPER_DATA_IS_INVALID (data); \
1.109 +}
1.110 +
1.111 +
1.112 +#endif /* HB_SHAPER_PRIVATE_HH */
