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comparison: gfx/harfbuzz/src/hb-shaper-private.hh
gfx/harfbuzz/src/hb-shaper-private.hh
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| 1 /* | |
| 2 * Copyright © 2012 Google, Inc. | |
| 3 * | |
| 4 * This is part of HarfBuzz, a text shaping library. | |
| 5 * | |
| 6 * Permission is hereby granted, without written agreement and without | |
| 7 * license or royalty fees, to use, copy, modify, and distribute this | |
| 8 * software and its documentation for any purpose, provided that the | |
| 9 * above copyright notice and the following two paragraphs appear in | |
| 10 * all copies of this software. | |
| 11 * | |
| 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR | |
| 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES | |
| 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN | |
| 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH | |
| 16 * DAMAGE. | |
| 17 * | |
| 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, | |
| 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND | |
| 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS | |
| 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO | |
| 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | |
| 23 * | |
| 24 * Google Author(s): Behdad Esfahbod | |
| 25 */ | |
| 26 | |
| 27 #ifndef HB_SHAPER_PRIVATE_HH | |
| 28 #define HB_SHAPER_PRIVATE_HH | |
| 29 | |
| 30 #include "hb-private.hh" | |
| 31 | |
| 32 typedef hb_bool_t hb_shape_func_t (hb_shape_plan_t *shape_plan, | |
| 33 hb_font_t *font, | |
| 34 hb_buffer_t *buffer, | |
| 35 const hb_feature_t *features, | |
| 36 unsigned int num_features); | |
| 37 | |
| 38 #define HB_SHAPER_IMPLEMENT(name) \ | |
| 39 extern "C" HB_INTERNAL hb_shape_func_t _hb_##name##_shape; | |
| 40 #include "hb-shaper-list.hh" | |
| 41 #undef HB_SHAPER_IMPLEMENT | |
| 42 | |
| 43 struct hb_shaper_pair_t { | |
| 44 char name[16]; | |
| 45 hb_shape_func_t *func; | |
| 46 }; | |
| 47 | |
| 48 HB_INTERNAL const hb_shaper_pair_t * | |
| 49 _hb_shapers_get (void); | |
| 50 | |
| 51 | |
| 52 /* For embedding in face / font / ... */ | |
| 53 struct hb_shaper_data_t { | |
| 54 #define HB_SHAPER_IMPLEMENT(shaper) void *shaper; | |
| 55 #include "hb-shaper-list.hh" | |
| 56 #undef HB_SHAPER_IMPLEMENT | |
| 57 }; | |
| 58 | |
| 59 #define HB_SHAPERS_COUNT (sizeof (hb_shaper_data_t) / sizeof (void *)) | |
| 60 | |
| 61 /* Means: succeeded, but don't need to keep any data. */ | |
| 62 #define HB_SHAPER_DATA_SUCCEEDED ((void *) +1) | |
| 63 | |
| 64 /* Means: tried but failed to create. */ | |
| 65 #define HB_SHAPER_DATA_INVALID ((void *) -1) | |
| 66 #define HB_SHAPER_DATA_IS_INVALID(data) ((void *) (data) == HB_SHAPER_DATA_INVALID) | |
| 67 | |
| 68 #define HB_SHAPER_DATA_TYPE(shaper, object) struct hb_##shaper##_shaper_##object##_data_t | |
| 69 #define HB_SHAPER_DATA_INSTANCE(shaper, object, instance) (* (HB_SHAPER_DATA_TYPE(shaper, object) **) &(instance)->shaper_data.shaper) | |
| 70 #define HB_SHAPER_DATA(shaper, object) HB_SHAPER_DATA_INSTANCE (shaper, object, object) | |
| 71 #define HB_SHAPER_DATA_CREATE_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_create | |
| 72 #define HB_SHAPER_DATA_DESTROY_FUNC(shaper, object) _hb_##shaper##_shaper_##object##_data_destroy | |
| 73 | |
| 74 #define HB_SHAPER_DATA_PROTOTYPE(shaper, object) \ | |
| 75 HB_SHAPER_DATA_TYPE (shaper, object); /* Type forward declaration. */ \ | |
| 76 extern "C" HB_INTERNAL HB_SHAPER_DATA_TYPE (shaper, object) * \ | |
| 77 HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (hb_##object##_t *object HB_SHAPER_DATA_CREATE_FUNC_EXTRA_ARGS); \ | |
| 78 extern "C" HB_INTERNAL void \ | |
| 79 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA_TYPE (shaper, object) *data) | |
| 80 | |
| 81 #define HB_SHAPER_DATA_DESTROY(shaper, object) \ | |
| 82 if (object->shaper_data.shaper && \ | |
| 83 object->shaper_data.shaper != HB_SHAPER_DATA_INVALID && \ | |
| 84 object->shaper_data.shaper != HB_SHAPER_DATA_SUCCEEDED) \ | |
| 85 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (HB_SHAPER_DATA (shaper, object)); | |
| 86 | |
| 87 #define HB_SHAPER_DATA_ENSURE_DECLARE(shaper, object) \ | |
| 88 static inline bool \ | |
| 89 hb_##shaper##_shaper_##object##_data_ensure (hb_##object##_t *object) \ | |
| 90 {\ | |
| 91 retry: \ | |
| 92 HB_SHAPER_DATA_TYPE (shaper, object) *data = (HB_SHAPER_DATA_TYPE (shaper, object) *) hb_atomic_ptr_get (&HB_SHAPER_DATA (shaper, object)); \ | |
| 93 if (unlikely (!data)) { \ | |
| 94 data = HB_SHAPER_DATA_CREATE_FUNC (shaper, object) (object); \ | |
| 95 if (unlikely (!data)) \ | |
| 96 data = (HB_SHAPER_DATA_TYPE (shaper, object) *) HB_SHAPER_DATA_INVALID; \ | |
| 97 if (!hb_atomic_ptr_cmpexch (&HB_SHAPER_DATA (shaper, object), NULL, data)) { \ | |
| 98 if (data && \ | |
| 99 data != HB_SHAPER_DATA_INVALID && \ | |
| 100 data != HB_SHAPER_DATA_SUCCEEDED) \ | |
| 101 HB_SHAPER_DATA_DESTROY_FUNC (shaper, object) (data); \ | |
| 102 goto retry; \ | |
| 103 } \ | |
| 104 } \ | |
| 105 return data != NULL && !HB_SHAPER_DATA_IS_INVALID (data); \ | |
| 106 } | |
| 107 | |
| 108 | |
| 109 #endif /* HB_SHAPER_PRIVATE_HH */ |
