1 files changed, 286 insertions, 0 deletions
diff --git a/src/3rdparty/harfbuzz/src/harfbuzz-shaper.h b/src/3rdparty/harfbuzz/src/harfbuzz-shaper.h
new file mode 100644
index 0000000000..470e27b6f9
--- /dev/null
+++ b/src/3rdparty/harfbuzz/src/harfbuzz-shaper.h
@@ -0,0 +1,286 @@
+/*
+ * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
+ *
+ * This is part of HarfBuzz, an OpenType Layout engine 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.
+ */
+
+#ifndef HARFBUZZ_SHAPER_H
+#define HARFBUZZ_SHAPER_H
+
+#include "harfbuzz-global.h"
+#include "harfbuzz-gdef.h"
+#include "harfbuzz-gpos.h"
+#include "harfbuzz-gsub.h"
+#include "harfbuzz-external.h"
+#include "harfbuzz-stream-private.h"
+
+HB_BEGIN_HEADER
+
+/*
+   using anything else than signed or unsigned for bitfields in C is non standard,
+   but accepted by almost all compilers. And it gives a significant reduction in
+   memory consumption as HB_CharAttributes and HB_GlyphAttributes will not have
+   a 4 byte alignment
+*/
+#ifdef  __xlC__
+typedef unsigned hb_bitfield;
+#else
+typedef hb_uint8 hb_bitfield;
+#endif
+
+typedef enum {
+        HB_Script_Common,
+        HB_Script_Greek,
+        HB_Script_Cyrillic,
+        HB_Script_Armenian,
+        HB_Script_Hebrew,
+        HB_Script_Arabic,
+        HB_Script_Syriac,
+        HB_Script_Thaana,
+        HB_Script_Devanagari,
+        HB_Script_Bengali,
+        HB_Script_Gurmukhi,
+        HB_Script_Gujarati,
+        HB_Script_Oriya,
+        HB_Script_Tamil,
+        HB_Script_Telugu,
+        HB_Script_Kannada,
+        HB_Script_Malayalam,
+        HB_Script_Sinhala,
+        HB_Script_Thai,
+        HB_Script_Lao,
+        HB_Script_Tibetan,
+        HB_Script_Myanmar,
+        HB_Script_Georgian,
+        HB_Script_Hangul,
+        HB_Script_Ogham,
+        HB_Script_Runic,
+        HB_Script_Khmer,
+        HB_Script_Nko,
+        HB_Script_Inherited,
+        HB_ScriptCount = HB_Script_Inherited
+        /*
+        HB_Script_Latin = Common,
+        HB_Script_Ethiopic = Common,
+        HB_Script_Cherokee = Common,
+        HB_Script_CanadianAboriginal = Common,
+        HB_Script_Mongolian = Common,
+        HB_Script_Hiragana = Common,
+        HB_Script_Katakana = Common,
+        HB_Script_Bopomofo = Common,
+        HB_Script_Han = Common,
+        HB_Script_Yi = Common,
+        HB_Script_OldItalic = Common,
+        HB_Script_Gothic = Common,
+        HB_Script_Deseret = Common,
+        HB_Script_Tagalog = Common,
+        HB_Script_Hanunoo = Common,
+        HB_Script_Buhid = Common,
+        HB_Script_Tagbanwa = Common,
+        HB_Script_Limbu = Common,
+        HB_Script_TaiLe = Common,
+        HB_Script_LinearB = Common,
+        HB_Script_Ugaritic = Common,
+        HB_Script_Shavian = Common,
+        HB_Script_Osmanya = Common,
+        HB_Script_Cypriot = Common,
+        HB_Script_Braille = Common,
+        HB_Script_Buginese = Common,
+        HB_Script_Coptic = Common,
+        HB_Script_NewTaiLue = Common,
+        HB_Script_Glagolitic = Common,
+        HB_Script_Tifinagh = Common,
+        HB_Script_SylotiNagri = Common,
+        HB_Script_OldPersian = Common,
+        HB_Script_Kharoshthi = Common,
+        HB_Script_Balinese = Common,
+        HB_Script_Cuneiform = Common,
+        HB_Script_Phoenician = Common,
+        HB_Script_PhagsPa = Common,
+        */
+} HB_Script;
+
+typedef struct
+{
+    hb_uint32 pos;
+    hb_uint32 length;
+    HB_Script script;
+    hb_uint8 bidiLevel;
+} HB_ScriptItem;
+
+typedef enum {
+    HB_NoBreak,
+    HB_SoftHyphen,
+    HB_Break,
+    HB_ForcedBreak
+} HB_LineBreakType;
+
+
+typedef struct {
+    /*HB_LineBreakType*/ hb_bitfield lineBreakType  :2;
+    /*HB_Bool*/ hb_bitfield whiteSpace              :1;     /* A unicode whitespace character, except NBSP, ZWNBSP */
+    /*HB_Bool*/ hb_bitfield charStop                :1;     /* Valid cursor position (for left/right arrow) */
+    /*HB_Bool*/ hb_bitfield wordBoundary            :1;
+    /*HB_Bool*/ hb_bitfield sentenceBoundary        :1;
+    hb_bitfield unused                  :2;
+} HB_CharAttributes;
+
+void HB_GetCharAttributes(const HB_UChar16 *string, hb_uint32 stringLength,
+                          const HB_ScriptItem *items, hb_uint32 numItems,
+                          HB_CharAttributes *attributes);
+
+/* requires HB_GetCharAttributes to be called before */
+void HB_GetWordBoundaries(const HB_UChar16 *string, hb_uint32 stringLength,
+                          const HB_ScriptItem *items, hb_uint32 numItems,
+                          HB_CharAttributes *attributes);
+
+/* requires HB_GetCharAttributes to be called before */
+void HB_GetSentenceBoundaries(const HB_UChar16 *string, hb_uint32 stringLength,
+                              const HB_ScriptItem *items, hb_uint32 numItems,
+                              HB_CharAttributes *attributes);
+
+
+typedef enum {
+    HB_LeftToRight = 0,
+    HB_RightToLeft = 1
+} HB_StringToGlyphsFlags;
+
+typedef enum {
+    HB_ShaperFlag_Default = 0,
+    HB_ShaperFlag_NoKerning = 1,
+    HB_ShaperFlag_UseDesignMetrics = 2
+} HB_ShaperFlag;
+
+/* 
+   highest value means highest priority for justification. Justification is done by first inserting kashidas
+   starting with the highest priority positions, then stretching spaces, afterwards extending inter char
+   spacing, and last spacing between arabic words.
+   NoJustification is for example set for arabic where no Kashida can be inserted or for diacritics.
+*/
+typedef enum {
+    HB_NoJustification= 0,   /* Justification can't be applied after this glyph */
+    HB_Arabic_Space   = 1,   /* This glyph represents a space inside arabic text */
+    HB_Character      = 2,   /* Inter-character justification point follows this glyph */
+    HB_Space          = 4,   /* This glyph represents a blank outside an Arabic run */
+    HB_Arabic_Normal  = 7,   /* Normal Middle-Of-Word glyph that connects to the right (begin) */
+    HB_Arabic_Waw     = 8,   /* Next character is final form of Waw/Ain/Qaf/Fa */
+    HB_Arabic_BaRa    = 9,   /* Next two chars are Ba + Ra/Ya/AlefMaksura */
+    HB_Arabic_Alef    = 10,  /* Next character is final form of Alef/Tah/Lam/Kaf/Gaf */
+    HB_Arabic_HaaDal  = 11,  /* Next character is final form of Haa/Dal/Taa Marbutah */
+    HB_Arabic_Seen    = 12,  /* Initial or Medial form Of Seen/Sad */
+    HB_Arabic_Kashida = 13   /* Kashida(U+640) in middle of word */
+} HB_JustificationClass;
+
+/* This structure is binary compatible with Uniscribe's SCRIPT_VISATTR. Would be nice to keep
+ * it like that. If this is a problem please tell Trolltech :)
+ */
+typedef struct {
+    hb_bitfield justification   :4;  /* Justification class */
+    hb_bitfield clusterStart    :1;  /* First glyph of representation of cluster */
+    hb_bitfield mark            :1;  /* needs to be positioned around base char */
+    hb_bitfield zeroWidth       :1;  /* ZWJ, ZWNJ etc, with no width */
+    hb_bitfield dontPrint       :1;
+    hb_bitfield combiningClass  :8;
+} HB_GlyphAttributes;
+
+typedef struct HB_FaceRec_ {
+    HB_Bool isSymbolFont;
+
+    HB_GDEF gdef;
+    HB_GSUB gsub;
+    HB_GPOS gpos;
+    HB_Bool supported_scripts[HB_ScriptCount];
+    HB_Buffer buffer;
+    HB_Script current_script;
+    int current_flags; /* HB_ShaperFlags */
+    HB_Bool has_opentype_kerning;
+    HB_Bool glyphs_substituted;
+    HB_GlyphAttributes *tmpAttributes;
+    unsigned int *tmpLogClusters;
+    int length;
+    int orig_nglyphs;
+} HB_FaceRec;
+
+typedef HB_Error (*HB_GetFontTableFunc)(void *font, HB_Tag tag, HB_Byte *buffer, HB_UInt *length);
+
+HB_Face HB_NewFace(void *font, HB_GetFontTableFunc tableFunc);
+void HB_FreeFace(HB_Face face);
+
+typedef struct {
+    HB_Fixed x, y;
+    HB_Fixed width, height;
+    HB_Fixed xOffset, yOffset;
+} HB_GlyphMetrics;
+
+typedef enum {
+    HB_FontAscent
+} HB_FontMetric;
+
+typedef struct {
+    HB_Bool  (*convertStringToGlyphIndices)(HB_Font font, const HB_UChar16 *string, hb_uint32 length, HB_Glyph *glyphs, hb_uint32 *numGlyphs, HB_Bool rightToLeft);
+    void     (*getGlyphAdvances)(HB_Font font, const HB_Glyph *glyphs, hb_uint32 numGlyphs, HB_Fixed *advances, int flags /*HB_ShaperFlag*/);
+    HB_Bool  (*canRender)(HB_Font font, const HB_UChar16 *string, hb_uint32 length);
+    /* implementation needs to make sure to load a scaled glyph, so /no/ FT_LOAD_NO_SCALE */
+    HB_Error (*getPointInOutline)(HB_Font font, HB_Glyph glyph, int flags /*HB_ShaperFlag*/, hb_uint32 point, HB_Fixed *xpos, HB_Fixed *ypos, hb_uint32 *nPoints);
+    void     (*getGlyphMetrics)(HB_Font font, HB_Glyph glyph, HB_GlyphMetrics *metrics);
+    HB_Fixed (*getFontMetric)(HB_Font font, HB_FontMetric metric);
+} HB_FontClass;
+
+typedef struct HB_Font_ {
+    const HB_FontClass *klass;
+
+    /* Metrics */
+    HB_UShort x_ppem, y_ppem;
+    HB_16Dot16 x_scale, y_scale;
+
+    void *userData;
+} HB_FontRec;
+
+typedef struct HB_ShaperItem_ HB_ShaperItem;
+
+struct HB_ShaperItem_ {
+    const HB_UChar16 *string;               /* input: the Unicode UTF16 text to be shaped */
+    hb_uint32 stringLength;                 /* input: the length of the input in 16-bit words */
+    HB_ScriptItem item;                     /* input: the current run to be shaped: a run of text all in the same script that is a substring of <string> */
+    HB_Font font;                           /* input: the font: scale, units and function pointers supplying glyph indices and metrics */
+    HB_Face face;                           /* input: the shaper state; current script, access to the OpenType tables , etc. */
+    int shaperFlags;                        /* input (unused) should be set to 0; intended to support flags defined in HB_ShaperFlag */
+    HB_Bool glyphIndicesPresent;            /* input: true if the <glyphs> array contains glyph indices ready to be shaped */
+    hb_uint32 initialGlyphCount;            /* input: if glyphIndicesPresent is true, the number of glyph indices in the <glyphs> array */
+
+    hb_uint32 num_glyphs;                   /* input: capacity of output arrays <glyphs>, <attributes>, <advances>, <offsets>, and <log_clusters>; */
+                                            /* output: required capacity (may be larger than actual capacity) */
+
+    HB_Glyph *glyphs;                       /* output: <num_glyphs> indices of shaped glyphs */
+    HB_GlyphAttributes *attributes;         /* output: <num_glyphs> glyph attributes */
+    HB_Fixed *advances;                     /* output: <num_glyphs> advances */
+    HB_FixedPoint *offsets;                 /* output: <num_glyphs> offsets */
+    unsigned short *log_clusters;           /* output: for each output glyph, the index in the input of the start of its logical cluster */
+
+    /* internal */
+    HB_Bool kerning_applied;                /* output: true if kerning was applied by the shaper */
+};
+
+HB_Bool HB_ShapeItem(HB_ShaperItem *item);
+
+HB_END_HEADER
+
+#endif