/*
* Copyright © 2007,2008,2009 Red Hat, Inc.
- * Copyright © 2012 Google, Inc.
+ * Copyright © 2012,2013 Google, Inc.
*
* This is part of HarfBuzz, a text shaping library.
*
#include "hb-private.hh"
-#include "hb-ot-layout.h"
-
#include "hb-font-private.hh"
#include "hb-buffer-private.hh"
#include "hb-set-private.hh"
-/* buffer var allocations, used during the GSUB/GPOS processing */
-#define glyph_props() var1.u16[0] /* GDEF glyph properties */
-#define syllable() var1.u8[2] /* GSUB/GPOS shaping boundaries */
-#define lig_props() var1.u8[3] /* GSUB/GPOS ligature tracking */
-
-#define hb_ot_layout_from_face(face) ((hb_ot_layout_t *) face->shaper_data.ot)
-
/*
* GDEF
*/
-typedef enum {
- HB_OT_LAYOUT_GLYPH_PROPS_UNCLASSIFIED = 0x0001,
- HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH = 0x0002,
- HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE = 0x0004,
- HB_OT_LAYOUT_GLYPH_PROPS_MARK = 0x0008,
- HB_OT_LAYOUT_GLYPH_PROPS_COMPONENT = 0x0010
+typedef enum
+{
+ /* The following three match LookupFlags::Ignore* numbers. */
+ HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH = 0x02u,
+ HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE = 0x04u,
+ HB_OT_LAYOUT_GLYPH_PROPS_MARK = 0x08u,
+
+ /* The following are used internally; not derived from GDEF. */
+ HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED = 0x10u,
+ HB_OT_LAYOUT_GLYPH_PROPS_LIGATED = 0x20u,
+ HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED = 0x40u,
+
+ HB_OT_LAYOUT_GLYPH_PROPS_PRESERVE = HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED |
+ HB_OT_LAYOUT_GLYPH_PROPS_LIGATED |
+ HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED
} hb_ot_layout_glyph_class_mask_t;
-
/*
* GSUB/GPOS
*/
-/* lig_id / lig_comp
+HB_INTERNAL hb_bool_t
+hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face,
+ unsigned int lookup_index,
+ const hb_codepoint_t *glyphs,
+ unsigned int glyphs_length,
+ hb_bool_t zero_context);
+
+
+/* Should be called before all the substitute_lookup's are done. */
+HB_INTERNAL void
+hb_ot_layout_substitute_start (hb_font_t *font,
+ hb_buffer_t *buffer);
+
+
+struct hb_ot_layout_lookup_accelerator_t;
+
+namespace OT {
+ struct hb_apply_context_t;
+ struct SubstLookup;
+}
+
+HB_INTERNAL void
+hb_ot_layout_substitute_lookup (OT::hb_apply_context_t *c,
+ const OT::SubstLookup &lookup,
+ const hb_ot_layout_lookup_accelerator_t &accel);
+
+
+/* Should be called after all the substitute_lookup's are done */
+HB_INTERNAL void
+hb_ot_layout_substitute_finish (hb_font_t *font,
+ hb_buffer_t *buffer);
+
+
+/* Should be called before all the position_lookup's are done. Resets positions to zero. */
+HB_INTERNAL void
+hb_ot_layout_position_start (hb_font_t *font,
+ hb_buffer_t *buffer);
+
+/* Should be called after all the position_lookup's are done */
+HB_INTERNAL void
+hb_ot_layout_position_finish (hb_font_t *font,
+ hb_buffer_t *buffer);
+
+
+
+/*
+ * hb_ot_layout_t
+ */
+
+namespace OT {
+ struct GDEF;
+ struct GSUB;
+ struct GPOS;
+}
+
+struct hb_ot_layout_lookup_accelerator_t
+{
+ template <typename TLookup>
+ inline void init (const TLookup &lookup)
+ {
+ digest.init ();
+ lookup.add_coverage (&digest);
+ }
+
+ template <typename TLookup>
+ inline void fini (const TLookup &lookup HB_UNUSED)
+ {
+ }
+
+ hb_set_digest_t digest;
+};
+
+struct hb_ot_layout_t
+{
+ hb_blob_t *gdef_blob;
+ hb_blob_t *gsub_blob;
+ hb_blob_t *gpos_blob;
+
+ const struct OT::GDEF *gdef;
+ const struct OT::GSUB *gsub;
+ const struct OT::GPOS *gpos;
+
+ unsigned int gsub_lookup_count;
+ unsigned int gpos_lookup_count;
+
+ hb_ot_layout_lookup_accelerator_t *gsub_accels;
+ hb_ot_layout_lookup_accelerator_t *gpos_accels;
+};
+
+
+HB_INTERNAL hb_ot_layout_t *
+_hb_ot_layout_create (hb_face_t *face);
+
+HB_INTERNAL void
+_hb_ot_layout_destroy (hb_ot_layout_t *layout);
+
+
+#define hb_ot_layout_from_face(face) ((hb_ot_layout_t *) face->shaper_data.ot)
+
+
+/*
+ * Buffer var routines.
+ */
+
+/* buffer var allocations, used during the entire shaping process */
+#define unicode_props0() var2.u8[0]
+#define unicode_props1() var2.u8[1]
+
+/* buffer var allocations, used during the GSUB/GPOS processing */
+#define glyph_props() var1.u16[0] /* GDEF glyph properties */
+#define lig_props() var1.u8[2] /* GSUB/GPOS ligature tracking */
+#define syllable() var1.u8[3] /* GSUB/GPOS shaping boundaries */
+
+/* unicode_props */
+
+enum {
+ MASK0_ZWJ = 0x20u,
+ MASK0_ZWNJ = 0x40u,
+ MASK0_IGNORABLE = 0x80u,
+ MASK0_GEN_CAT = 0x1Fu
+};
+
+static inline void
+_hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_unicode_funcs_t *unicode)
+{
+ /* XXX This shouldn't be inlined, or at least not while is_default_ignorable() is inline. */
+ info->unicode_props0() = ((unsigned int) unicode->general_category (info->codepoint)) |
+ (unicode->is_default_ignorable (info->codepoint) ? MASK0_IGNORABLE : 0) |
+ (info->codepoint == 0x200Cu ? MASK0_ZWNJ : 0) |
+ (info->codepoint == 0x200Du ? MASK0_ZWJ : 0);
+ info->unicode_props1() = unicode->modified_combining_class (info->codepoint);
+}
+
+static inline void
+_hb_glyph_info_set_general_category (hb_glyph_info_t *info,
+ hb_unicode_general_category_t gen_cat)
+{
+ info->unicode_props0() = (unsigned int) gen_cat | ((info->unicode_props0()) & ~MASK0_GEN_CAT);
+}
+
+static inline hb_unicode_general_category_t
+_hb_glyph_info_get_general_category (const hb_glyph_info_t *info)
+{
+ return (hb_unicode_general_category_t) (info->unicode_props0() & MASK0_GEN_CAT);
+}
+
+static inline void
+_hb_glyph_info_set_modified_combining_class (hb_glyph_info_t *info,
+ unsigned int modified_class)
+{
+ info->unicode_props1() = modified_class;
+}
+
+static inline unsigned int
+_hb_glyph_info_get_modified_combining_class (const hb_glyph_info_t *info)
+{
+ return info->unicode_props1();
+}
+
+static inline hb_bool_t
+_hb_glyph_info_is_default_ignorable (const hb_glyph_info_t *info)
+{
+ return !!(info->unicode_props0() & MASK0_IGNORABLE);
+}
+
+static inline hb_bool_t
+_hb_glyph_info_is_zwnj (const hb_glyph_info_t *info)
+{
+ return !!(info->unicode_props0() & MASK0_ZWNJ);
+}
+
+static inline hb_bool_t
+_hb_glyph_info_is_zwj (const hb_glyph_info_t *info)
+{
+ return !!(info->unicode_props0() & MASK0_ZWJ);
+}
+
+static inline void
+_hb_glyph_info_flip_joiners (hb_glyph_info_t *info)
+{
+ info->unicode_props0() ^= MASK0_ZWNJ | MASK0_ZWJ;
+}
+
+/* lig_props: aka lig_id / lig_comp
*
* When a ligature is formed:
*
* - The marks get lig_comp > 0, reflecting which component of the ligature
* they were applied to.
* - This is used in GPOS to attach marks to the right component of a ligature
- * in MarkLigPos.
+ * in MarkLigPos,
+ * - Note that when marks are ligated together, much of the above is skipped
+ * and the current lig_id reused.
*
* When a multiple-substitution is done:
*
* multiple substitution in MarkBasePos.
*
* The numbers are also used in GPOS to do mark-to-mark positioning only
- * to marks that belong to the same component of a ligature in MarkMarPos.
+ * to marks that belong to the same component of the same ligature.
*/
+
+static inline void
+_hb_glyph_info_clear_lig_props (hb_glyph_info_t *info)
+{
+ info->lig_props() = 0;
+}
+
#define IS_LIG_BASE 0x10
+
static inline void
-set_lig_props_for_ligature (hb_glyph_info_t &info, unsigned int lig_id, unsigned int lig_num_comps)
+_hb_glyph_info_set_lig_props_for_ligature (hb_glyph_info_t *info,
+ unsigned int lig_id,
+ unsigned int lig_num_comps)
{
- info.lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F);
+ info->lig_props() = (lig_id << 5) | IS_LIG_BASE | (lig_num_comps & 0x0F);
}
+
static inline void
-set_lig_props_for_mark (hb_glyph_info_t &info, unsigned int lig_id, unsigned int lig_comp)
+_hb_glyph_info_set_lig_props_for_mark (hb_glyph_info_t *info,
+ unsigned int lig_id,
+ unsigned int lig_comp)
{
- info.lig_props() = (lig_id << 5) | (lig_comp & 0x0F);
+ info->lig_props() = (lig_id << 5) | (lig_comp & 0x0F);
}
+
static inline void
-set_lig_props_for_component (hb_glyph_info_t &info, unsigned int comp)
+_hb_glyph_info_set_lig_props_for_component (hb_glyph_info_t *info, unsigned int comp)
{
- set_lig_props_for_mark (info, 0, comp);
+ _hb_glyph_info_set_lig_props_for_mark (info, 0, comp);
}
static inline unsigned int
-get_lig_id (const hb_glyph_info_t &info)
+_hb_glyph_info_get_lig_id (const hb_glyph_info_t *info)
{
- return info.lig_props() >> 5;
+ return info->lig_props() >> 5;
}
+
static inline bool
-is_a_ligature (const hb_glyph_info_t &info)
+_hb_glyph_info_ligated_internal (const hb_glyph_info_t *info)
{
- return !!(info.lig_props() & IS_LIG_BASE);
+ return !!(info->lig_props() & IS_LIG_BASE);
}
+
static inline unsigned int
-get_lig_comp (const hb_glyph_info_t &info)
+_hb_glyph_info_get_lig_comp (const hb_glyph_info_t *info)
{
- if (is_a_ligature (info))
+ if (_hb_glyph_info_ligated_internal (info))
return 0;
else
- return info.lig_props() & 0x0F;
+ return info->lig_props() & 0x0F;
}
+
static inline unsigned int
-get_lig_num_comps (const hb_glyph_info_t &info)
+_hb_glyph_info_get_lig_num_comps (const hb_glyph_info_t *info)
{
- if ((info.glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) && is_a_ligature (info))
- return info.lig_props() & 0x0F;
+ if ((info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE) &&
+ _hb_glyph_info_ligated_internal (info))
+ return info->lig_props() & 0x0F;
else
return 1;
}
-static inline uint8_t allocate_lig_id (hb_buffer_t *buffer) {
+static inline uint8_t
+_hb_allocate_lig_id (hb_buffer_t *buffer) {
uint8_t lig_id = buffer->next_serial () & 0x07;
if (unlikely (!lig_id))
- lig_id = allocate_lig_id (buffer); /* in case of overflow */
+ lig_id = _hb_allocate_lig_id (buffer); /* in case of overflow */
return lig_id;
}
+/* glyph_props: */
-HB_INTERNAL hb_bool_t
-hb_ot_layout_lookup_would_substitute_fast (hb_face_t *face,
- unsigned int lookup_index,
- const hb_codepoint_t *glyphs,
- unsigned int glyphs_length,
- hb_bool_t zero_context);
+static inline void
+_hb_glyph_info_set_glyph_props (hb_glyph_info_t *info, unsigned int props)
+{
+ info->glyph_props() = props;
+}
+static inline unsigned int
+_hb_glyph_info_get_glyph_props (const hb_glyph_info_t *info)
+{
+ return info->glyph_props();
+}
-/* Should be called before all the substitute_lookup's are done. */
-HB_INTERNAL void
-hb_ot_layout_substitute_start (hb_font_t *font,
- hb_buffer_t *buffer);
+static inline bool
+_hb_glyph_info_is_base_glyph (const hb_glyph_info_t *info)
+{
+ return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_BASE_GLYPH);
+}
-HB_INTERNAL hb_bool_t
-hb_ot_layout_substitute_lookup (hb_font_t *font,
- hb_buffer_t *buffer,
- unsigned int lookup_index,
- hb_mask_t mask);
+static inline bool
+_hb_glyph_info_is_ligature (const hb_glyph_info_t *info)
+{
+ return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATURE);
+}
-/* Should be called after all the substitute_lookup's are done */
-HB_INTERNAL void
-hb_ot_layout_substitute_finish (hb_font_t *font,
- hb_buffer_t *buffer);
+static inline bool
+_hb_glyph_info_is_mark (const hb_glyph_info_t *info)
+{
+ return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MARK);
+}
+static inline bool
+_hb_glyph_info_substituted (const hb_glyph_info_t *info)
+{
+ return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_SUBSTITUTED);
+}
-/* Should be called before all the position_lookup's are done. Resets positions to zero. */
-HB_INTERNAL void
-hb_ot_layout_position_start (hb_font_t *font,
- hb_buffer_t *buffer);
+static inline bool
+_hb_glyph_info_ligated (const hb_glyph_info_t *info)
+{
+ return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_LIGATED);
+}
-HB_INTERNAL hb_bool_t
-hb_ot_layout_position_lookup (hb_font_t *font,
- hb_buffer_t *buffer,
- unsigned int lookup_index,
- hb_mask_t mask);
+static inline bool
+_hb_glyph_info_multiplied (const hb_glyph_info_t *info)
+{
+ return !!(info->glyph_props() & HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
+}
-/* Should be called after all the position_lookup's are done */
-HB_INTERNAL void
-hb_ot_layout_position_finish (hb_font_t *font,
- hb_buffer_t *buffer,
- hb_bool_t zero_width_attached_marks);
+static inline bool
+_hb_glyph_info_ligated_and_didnt_multiply (const hb_glyph_info_t *info)
+{
+ return _hb_glyph_info_ligated (info) && !_hb_glyph_info_multiplied (info);
+}
+static inline void
+_hb_glyph_info_clear_ligated_and_multiplied (hb_glyph_info_t *info)
+{
+ info->glyph_props() &= ~(HB_OT_LAYOUT_GLYPH_PROPS_LIGATED |
+ HB_OT_LAYOUT_GLYPH_PROPS_MULTIPLIED);
+}
-/*
- * hb_ot_layout_t
- */
+/* Allocation / deallocation. */
-namespace OT {
- struct GDEF;
- struct GSUB;
- struct GPOS;
+static inline void
+_hb_buffer_allocate_unicode_vars (hb_buffer_t *buffer)
+{
+ HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props0);
+ HB_BUFFER_ALLOCATE_VAR (buffer, unicode_props1);
}
-struct hb_ot_layout_t
+static inline void
+_hb_buffer_deallocate_unicode_vars (hb_buffer_t *buffer)
{
- hb_blob_t *gdef_blob;
- hb_blob_t *gsub_blob;
- hb_blob_t *gpos_blob;
-
- const struct OT::GDEF *gdef;
- const struct OT::GSUB *gsub;
- const struct OT::GPOS *gpos;
-
- unsigned int gsub_lookup_count;
- unsigned int gpos_lookup_count;
+ HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props0);
+ HB_BUFFER_DEALLOCATE_VAR (buffer, unicode_props1);
+}
- hb_set_digest_t *gsub_digests;
- hb_set_digest_t *gpos_digests;
-};
+static inline void
+_hb_buffer_assert_unicode_vars (hb_buffer_t *buffer)
+{
+ HB_BUFFER_ASSERT_VAR (buffer, unicode_props0);
+ HB_BUFFER_ASSERT_VAR (buffer, unicode_props1);
+}
+static inline void
+_hb_buffer_allocate_gsubgpos_vars (hb_buffer_t *buffer)
+{
+ HB_BUFFER_ALLOCATE_VAR (buffer, glyph_props);
+ HB_BUFFER_ALLOCATE_VAR (buffer, lig_props);
+ HB_BUFFER_ALLOCATE_VAR (buffer, syllable);
+}
-HB_INTERNAL hb_ot_layout_t *
-_hb_ot_layout_create (hb_face_t *face);
+static inline void
+_hb_buffer_deallocate_gsubgpos_vars (hb_buffer_t *buffer)
+{
+ HB_BUFFER_DEALLOCATE_VAR (buffer, syllable);
+ HB_BUFFER_DEALLOCATE_VAR (buffer, lig_props);
+ HB_BUFFER_DEALLOCATE_VAR (buffer, glyph_props);
+}
-HB_INTERNAL void
-_hb_ot_layout_destroy (hb_ot_layout_t *layout);
+static inline void
+_hb_buffer_assert_gsubgpos_vars (hb_buffer_t *buffer)
+{
+ HB_BUFFER_ASSERT_VAR (buffer, glyph_props);
+ HB_BUFFER_ASSERT_VAR (buffer, lig_props);
+ HB_BUFFER_ASSERT_VAR (buffer, syllable);
+}
+/* Make sure no one directly touches our props... */
+#undef unicode_props0
+#undef unicode_props1
+#undef lig_props
+#undef glyph_props
#endif /* HB_OT_LAYOUT_PRIVATE_HH */
projects / platform / upstream / harfbuzz.git / blobdiff