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-rw-r--r--src/autofit/aftypes.h287
1 files changed, 195 insertions, 92 deletions
diff --git a/src/autofit/aftypes.h b/src/autofit/aftypes.h
index 9acd7ad..cda1f89 100644
--- a/src/autofit/aftypes.h
+++ b/src/autofit/aftypes.h
@@ -4,7 +4,7 @@
/* */
/* Auto-fitter types (specification only). */
/* */
-/* Copyright 2003-2009, 2011-2012 by */
+/* Copyright 2003-2009, 2011-2013 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* This file is part of the FreeType project, and may only be used, */
@@ -20,15 +20,12 @@
*
* The auto-fitter is a complete rewrite of the old auto-hinter.
* Its main feature is the ability to differentiate between different
- * scripts in order to apply language-specific rules.
+ * writing systems in order to apply script-specific rules.
*
* The code has also been compartmentized into several entities that
* should make algorithmic experimentation easier than with the old
* code.
*
- * Finally, we get rid of the Catharon license, since this code is
- * released under the FreeType one.
- *
*************************************************************************/
@@ -42,6 +39,8 @@
#include FT_INTERNAL_OBJECTS_H
#include FT_INTERNAL_DEBUG_H
+#include "afblue.h"
+
FT_BEGIN_HEADER
@@ -201,56 +200,21 @@ extern void* _af_debug_hints;
/*************************************************************************/
/*************************************************************************/
/***** *****/
- /***** S C R I P T S *****/
+ /***** S C R I P T M E T R I C S *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
- /*
- * The list of known scripts. Each different script corresponds to the
- * following information:
- *
- * - A set of Unicode ranges to test whether the face supports the
- * script.
- *
- * - A specific global analyzer that will compute global metrics
- * specific to the script.
- *
- * - A specific glyph analyzer that will compute segments and
- * edges for each glyph covered by the script.
- *
- * - A specific grid-fitting algorithm that will distort the
- * scaled glyph outline according to the results of the glyph
- * analyzer.
- *
- * Note that a given analyzer and/or grid-fitting algorithm can be
- * used by more than one script.
- */
-
- typedef enum AF_Script_
- {
- AF_SCRIPT_DUMMY = 0,
- AF_SCRIPT_LATIN = 1,
- AF_SCRIPT_CJK = 2,
- AF_SCRIPT_INDIC = 3,
-#ifdef FT_OPTION_AUTOFIT2
- AF_SCRIPT_LATIN2 = 4,
-#endif
-
- /* add new scripts here. Don't forget to update the list in */
- /* `afglobal.c'. */
-
- AF_SCRIPT_MAX /* do not remove */
-
- } AF_Script;
+ /* This is the main structure which combines writing systems and script */
+ /* data (for a given face object, see below). */
-
- typedef struct AF_ScriptClassRec_ const* AF_ScriptClass;
- typedef struct AF_FaceGlobalsRec_* AF_FaceGlobals;
+ typedef struct AF_WritingSystemClassRec_ const* AF_WritingSystemClass;
+ typedef struct AF_ScriptClassRec_ const* AF_ScriptClass;
+ typedef struct AF_FaceGlobalsRec_* AF_FaceGlobals;
typedef struct AF_ScriptMetricsRec_
{
- AF_ScriptClass clazz;
+ AF_ScriptClass script_class;
AF_ScalerRec scaler;
FT_Bool digits_have_same_width;
@@ -284,23 +248,54 @@ extern void* _af_debug_hints;
AF_ScriptMetrics metrics );
- typedef struct AF_Script_UniRangeRec_
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** W R I T I N G S Y S T E M S *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ /*
+ * In FreeType, a writing system consists of multiple scripts which can
+ * be handled similarly *in a typographical way*; the relationship is not
+ * based on history. For example, both the Greek and the unrelated
+ * Armenian scripts share the same features like ascender, descender,
+ * x-height, etc. Essentially, a writing system is covered by a
+ * submodule of the auto-fitter; it contains
+ *
+ * - a specific global analyzer which computes global metrics specific to
+ * the script (based on script-specific characters to identify ascender
+ * height, x-height, etc.),
+ *
+ * - a specific glyph analyzer that computes segments and edges for each
+ * glyph covered by the script,
+ *
+ * - a specific grid-fitting algorithm that distorts the scaled glyph
+ * outline according to the results of the glyph analyzer.
+ */
+
+#define __AFWRTSYS_H__ /* don't load header files */
+#undef WRITING_SYSTEM
+#define WRITING_SYSTEM( ws, WS ) \
+ AF_WRITING_SYSTEM_ ## WS,
+
+ /* The list of known writing systems. */
+ typedef enum AF_WritingSystem_
{
- FT_UInt32 first;
- FT_UInt32 last;
- } AF_Script_UniRangeRec;
+#include "afwrtsys.h"
-#define AF_UNIRANGE_REC( a, b ) { (FT_UInt32)(a), (FT_UInt32)(b) }
+ AF_WRITING_SYSTEM_MAX /* do not remove */
- typedef const AF_Script_UniRangeRec *AF_Script_UniRange;
+ } AF_WritingSystem;
+#undef __AFWRTSYS_H__
- typedef struct AF_ScriptClassRec_
+
+ typedef struct AF_WritingSystemClassRec_
{
- AF_Script script;
- AF_Script_UniRange script_uni_ranges; /* last must be { 0, 0 } */
- FT_UInt32 standard_char; /* for default width and height */
+ AF_WritingSystem writing_system;
FT_Offset script_metrics_size;
AF_Script_InitMetricsFunc script_metrics_init;
@@ -310,59 +305,167 @@ extern void* _af_debug_hints;
AF_Script_InitHintsFunc script_hints_init;
AF_Script_ApplyHintsFunc script_hints_apply;
+ } AF_WritingSystemClassRec;
+
+
+ /*************************************************************************/
+ /*************************************************************************/
+ /***** *****/
+ /***** S C R I P T S *****/
+ /***** *****/
+ /*************************************************************************/
+ /*************************************************************************/
+
+ /*
+ * Each script is associated with a set of Unicode ranges which gets used
+ * to test whether the font face supports the script. It also references
+ * the writing system it belongs to.
+ *
+ * We use four-letter script tags from the OpenType specification.
+ */
+
+#undef SCRIPT
+#define SCRIPT( s, S, d ) \
+ AF_SCRIPT_ ## S,
+
+ /* The list of known scripts. */
+ typedef enum AF_Script_
+ {
+
+#include "afscript.h"
+
+ AF_SCRIPT_MAX /* do not remove */
+
+ } AF_Script;
+
+
+ typedef struct AF_Script_UniRangeRec_
+ {
+ FT_UInt32 first;
+ FT_UInt32 last;
+
+ } AF_Script_UniRangeRec;
+
+#define AF_UNIRANGE_REC( a, b ) { (FT_UInt32)(a), (FT_UInt32)(b) }
+
+ typedef const AF_Script_UniRangeRec* AF_Script_UniRange;
+
+
+ typedef struct AF_ScriptClassRec_
+ {
+ AF_Script script;
+ AF_Blue_Stringset blue_stringset;
+ AF_WritingSystem writing_system;
+
+ AF_Script_UniRange script_uni_ranges; /* last must be { 0, 0 } */
+ FT_UInt32 standard_char; /* for default width and height */
+
} AF_ScriptClassRec;
/* Declare and define vtables for classes */
#ifndef FT_CONFIG_OPTION_PIC
+#define AF_DECLARE_WRITING_SYSTEM_CLASS( writing_system_class ) \
+ FT_CALLBACK_TABLE const AF_WritingSystemClassRec \
+ writing_system_class;
+
+#define AF_DEFINE_WRITING_SYSTEM_CLASS( \
+ writing_system_class, \
+ system, \
+ m_size, \
+ m_init, \
+ m_scale, \
+ m_done, \
+ h_init, \
+ h_apply ) \
+ FT_CALLBACK_TABLE_DEF \
+ const AF_WritingSystemClassRec writing_system_class = \
+ { \
+ system, \
+ \
+ m_size, \
+ \
+ m_init, \
+ m_scale, \
+ m_done, \
+ \
+ h_init, \
+ h_apply \
+ };
+
+
#define AF_DECLARE_SCRIPT_CLASS( script_class ) \
FT_CALLBACK_TABLE const AF_ScriptClassRec \
script_class;
-#define AF_DEFINE_SCRIPT_CLASS( script_class, script_, ranges, def_char, \
- m_size, \
- m_init, m_scale, m_done, h_init, h_apply ) \
- FT_CALLBACK_TABLE_DEF const AF_ScriptClassRec script_class = \
- { \
- script_, \
- ranges, \
- def_char, \
- \
- m_size, \
- \
- m_init, \
- m_scale, \
- m_done, \
- \
- h_init, \
- h_apply \
+#define AF_DEFINE_SCRIPT_CLASS( \
+ script_class, \
+ script_, \
+ blue_stringset_, \
+ writing_system_, \
+ ranges, \
+ std_char ) \
+ FT_CALLBACK_TABLE_DEF \
+ const AF_ScriptClassRec script_class = \
+ { \
+ script_, \
+ blue_stringset_, \
+ writing_system_, \
+ ranges, \
+ std_char \
};
#else /* FT_CONFIG_OPTION_PIC */
+#define AF_DECLARE_WRITING_SYSTEM_CLASS( writing_system_class ) \
+ FT_LOCAL( void ) \
+ FT_Init_Class_ ## writing_system_class( AF_WritingSystemClassRec* ac );
+
+#define AF_DEFINE_WRITING_SYSTEM_CLASS( \
+ writing_system_class, \
+ system, \
+ m_size, \
+ m_init, \
+ m_scale, \
+ m_done, \
+ h_init, \
+ h_apply ) \
+ FT_LOCAL_DEF( void ) \
+ FT_Init_Class_ ## writing_system_class( AF_WritingSystemClassRec* ac ) \
+ { \
+ ac->writing_system = system; \
+ \
+ ac->script_metrics_size = m_size; \
+ \
+ ac->script_metrics_init = m_init; \
+ ac->script_metrics_scale = m_scale; \
+ ac->script_metrics_done = m_done; \
+ \
+ ac->script_hints_init = h_init; \
+ ac->script_hints_apply = h_apply; \
+ }
+
+
#define AF_DECLARE_SCRIPT_CLASS( script_class ) \
FT_LOCAL( void ) \
FT_Init_Class_ ## script_class( AF_ScriptClassRec* ac );
-#define AF_DEFINE_SCRIPT_CLASS( script_class, script_, ranges, def_char, \
- m_size, \
- m_init, m_scale, m_done, h_init, h_apply ) \
- FT_LOCAL_DEF( void ) \
- FT_Init_Class_ ## script_class( AF_ScriptClassRec* ac ) \
- { \
- ac->script = script_; \
- ac->script_uni_ranges = ranges; \
- ac->default_char = def_char; \
- \
- ac->script_metrics_size = m_size; \
- \
- ac->script_metrics_init = m_init; \
- ac->script_metrics_scale = m_scale; \
- ac->script_metrics_done = m_done; \
- \
- ac->script_hints_init = h_init; \
- ac->script_hints_apply = h_apply; \
+#define AF_DEFINE_SCRIPT_CLASS( \
+ script_class, \
+ script_, \
+ blue_string_set_, \
+ writing_system_, \
+ ranges, \
+ std_char ) \
+ FT_LOCAL_DEF( void ) \
+ FT_Init_Class_ ## script_class( AF_ScriptClassRec* ac ) \
+ { \
+ ac->script = script_; \
+ ac->blue_stringset = blue_stringset_; \
+ ac->writing_system = writing_system_; \
+ ac->script_uni_ranges = ranges; \
+ ac->standard_char = std_char; \
}
#endif /* FT_CONFIG_OPTION_PIC */
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