[gdef] Initial implementation

diff --git a/src/harfbuzz-gdef-private.h b/src/harfbuzz-gdef-private.h
index 0d95dad..91083c0 100644 (file)
--- a/src/harfbuzz-gdef-private.h
+++ b/src/harfbuzz-gdef-private.h
@@ -1,8 +1,148 @@
 #ifndef HARFBUZZ_GDEF_PRIVATE_H
 #define HARFBUZZ_GDEF_PRIVATE_H
 
-#include "harfbuzz-private.h"
-#include "harfbuzz-gdef.h"
+#include "harfbuzz-open-private.h"
 
+struct GDEFHeader {
+  Fixed                version;                /* Version of the GDEF table--initially
+                                        * 0x00010000 */
+  Offset       glyphClassDef;          /* Offset to class definition table
+                                        * for glyph type--from beginning of
+                                        * GDEF header (may be NULL) */
+  Offset       attachList;             /* Offset to list of glyphs with
+                                        * attachment points--from beginning
+                                        * of GDEF header (may be NULL) */
+  Offset       ligCaretList;           /* Offset to list of positioning points
+                                        * for ligature carets--from beginning
+                                        * of GDEF header (may be NULL) */
+  Offset       markAttachClassDef;     /* Offset to class definition table for
+                                        * mark attachment type--from beginning
+                                        * of GDEF header (may be NULL) */
+};
+
+struct GlyphClassDef : ClassDef {
+  static const uint16_t BaseGlyph              = 0x0001u;
+  static const uint16_t LigatureGlyph          = 0x0002u;
+  static const uint16_t MarkGlyph              = 0x0003u;
+  static const uint16_t ComponentGlyph         = 0x0004u;
+};
+
+
+struct AttachList {
+  /* XXX */
+
+  Offset       coverage;               /* Offset to Coverage table -- from
+                                        * beginning of AttachList table */
+  USHORT       glyphCount;             /* Number of glyphs with attachment
+                                        * points */
+  Offset       attachPoint[];          /* Array of offsets to AttachPoint
+                                        * tables--from beginning of AttachList
+                                        * table--in Coverage Index order */
+};
+
+struct AttachPoint {
+  /* XXX */
+
+  USHORT       pointCount;             /* Number of attachment points on
+                                        * this glyph */
+  USHORT       pointIndex[];           /* Array of contour point indices--in
+                                        * increasing numerical order */
+};
+
+/*
+ * Ligature Caret Table
+ */
+
+struct CaretValue;
+
+struct LigCaretList {
+  /* XXX */
+
+  Offset       coverage;               /* Offset to Coverage table--from
+                                        * beginning of LigCaretList table */
+  USHORT       ligGlyphCount;          /* Number of ligature glyphs */
+  Offset       ligGlyph[];             /* Array of offsets to LigGlyph
+                                        * tables--from beginning of
+                                        * LigCaretList table--in Coverage
+                                        * Index order */
+};
+
+struct LigGlyph {
+  /* Caret value tables, in increasing coordinate order */
+  DEFINE_OFFSET_ARRAY_TYPE (CaretValue, caretValue, caretCount);
+  /* XXX */
+
+  USHORT       caretCount;             /* Number of CaretValues for this
+                                        * ligature (components - 1) */
+  Offset       caretValue[];           /* Array of offsets to CaretValue
+                                        * tables--from beginning of LigGlyph
+                                        * table--in increasing coordinate
+                                        * order */
+};
+
+struct CaretValueFormat1 {
+  USHORT       caretValueFormat;       /* Format identifier--format = 1 */
+  SHORT                coordinate;             /* X or Y value, in design units */
+
+  inline int get_caret_value (int ppem) const {
+    return /* XXX garbage */ coordinate / ppem;
+  }
+};
+
+struct CaretValueFormat2 {
+  USHORT       caretValueFormat;       /* Format identifier--format = 2 */
+  USHORT       caretValuePoint;        /* Contour point index on glyph */
+
+  inline int get_caret_value (int ppem) const {
+    return /* XXX garbage */ 0 / ppem;
+  }
+};
+
+struct CaretValueFormat3 {
+  inline const Device* get_device (void) const {
+    return (const Device*)((const char*)this + deviceTable);
+  }
+
+  USHORT       caretValueFormat;       /* Format identifier--format = 3 */
+  SHORT                coordinate;             /* X or Y value, in design units */
+  Offset       deviceTable;            /* Offset to Device table for X or Y
+                                        * value--from beginning of CaretValue
+                                        * table */
+
+  inline int get_caret_value (int ppem) const {
+    return /* XXX garbage */ (coordinate + get_device()->get_delta (ppem)) / ppem;
+  }
+};
+
+struct CaretValue {
+  DEFINE_NON_INSTANTIABLE(CaretValue);
+
+  inline unsigned int get_size (void) const {
+    switch (u.caretValueFormat) {
+    case 1: return sizeof (u.format1);
+    case 2: return sizeof (u.format2);
+    case 3: return sizeof (u.format3);
+    default:return sizeof (u.caretValueFormat);
+    }
+  }
+
+  /* XXX  we need access to a load-contour-point vfunc here */
+  inline int get_caret_value (int ppem) const {
+    switch (u.caretValueFormat) {
+    case 1: return u.format1.get_caret_value(ppem);
+    case 2: return u.format2.get_caret_value(ppem);
+    case 3: return u.format3.get_caret_value(ppem);
+    default:return 0;
+    }
+  }
+
+  union {
+  USHORT       caretValueFormat;       /* Format identifier */
+  CaretValueFormat1    format1;
+  CaretValueFormat2    format2;
+  CaretValueFormat3    format3;
+  /* XXX old HarfBuzz code has a format 4 here! */
+  } u;
+};
 
 #endif /* HARFBUZZ_GDEF_PRIVATE_H */