diff -r a501f5ec7b34 -r 0f5961910e27 misc/libfreetype/include/freetype/internal/autohint.h --- a/misc/libfreetype/include/freetype/internal/autohint.h Tue Jul 16 11:14:27 2013 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,231 +0,0 @@ -/***************************************************************************/ -/* */ -/* autohint.h */ -/* */ -/* High-level `autohint' module-specific interface (specification). */ -/* */ -/* Copyright 1996-2001, 2002, 2007 by */ -/* David Turner, Robert Wilhelm, and Werner Lemberg. */ -/* */ -/* This file is part of the FreeType project, and may only be used, */ -/* modified, and distributed under the terms of the FreeType project */ -/* license, LICENSE.TXT. By continuing to use, modify, or distribute */ -/* this file you indicate that you have read the license and */ -/* understand and accept it fully. */ -/* */ -/***************************************************************************/ - - - /*************************************************************************/ - /* */ - /* The auto-hinter is used to load and automatically hint glyphs if a */ - /* format-specific hinter isn't available. */ - /* */ - /*************************************************************************/ - - -#ifndef __AUTOHINT_H__ -#define __AUTOHINT_H__ - - - /*************************************************************************/ - /* */ - /* A small technical note regarding automatic hinting in order to */ - /* clarify this module interface. */ - /* */ - /* An automatic hinter might compute two kinds of data for a given face: */ - /* */ - /* - global hints: Usually some metrics that describe global properties */ - /* of the face. It is computed by scanning more or less */ - /* aggressively the glyphs in the face, and thus can be */ - /* very slow to compute (even if the size of global */ - /* hints is really small). */ - /* */ - /* - glyph hints: These describe some important features of the glyph */ - /* outline, as well as how to align them. They are */ - /* generally much faster to compute than global hints. */ - /* */ - /* The current FreeType auto-hinter does a pretty good job while */ - /* performing fast computations for both global and glyph hints. */ - /* However, we might be interested in introducing more complex and */ - /* powerful algorithms in the future, like the one described in the John */ - /* D. Hobby paper, which unfortunately requires a lot more horsepower. */ - /* */ - /* Because a sufficiently sophisticated font management system would */ - /* typically implement an LRU cache of opened face objects to reduce */ - /* memory usage, it is a good idea to be able to avoid recomputing */ - /* global hints every time the same face is re-opened. */ - /* */ - /* We thus provide the ability to cache global hints outside of the face */ - /* object, in order to speed up font re-opening time. Of course, this */ - /* feature is purely optional, so most client programs won't even notice */ - /* it. */ - /* */ - /* I initially thought that it would be a good idea to cache the glyph */ - /* hints too. However, my general idea now is that if you really need */ - /* to cache these too, you are simply in need of a new font format, */ - /* where all this information could be stored within the font file and */ - /* decoded on the fly. */ - /* */ - /*************************************************************************/ - - -#include -#include FT_FREETYPE_H - - -FT_BEGIN_HEADER - - - typedef struct FT_AutoHinterRec_ *FT_AutoHinter; - - - /*************************************************************************/ - /* */ - /* */ - /* FT_AutoHinter_GlobalGetFunc */ - /* */ - /* */ - /* Retrieves the global hints computed for a given face object the */ - /* resulting data is dissociated from the face and will survive a */ - /* call to FT_Done_Face(). It must be discarded through the API */ - /* FT_AutoHinter_GlobalDoneFunc(). */ - /* */ - /* */ - /* hinter :: A handle to the source auto-hinter. */ - /* */ - /* face :: A handle to the source face object. */ - /* */ - /* */ - /* global_hints :: A typeless pointer to the global hints. */ - /* */ - /* global_len :: The size in bytes of the global hints. */ - /* */ - typedef void - (*FT_AutoHinter_GlobalGetFunc)( FT_AutoHinter hinter, - FT_Face face, - void** global_hints, - long* global_len ); - - - /*************************************************************************/ - /* */ - /* */ - /* FT_AutoHinter_GlobalDoneFunc */ - /* */ - /* */ - /* Discards the global hints retrieved through */ - /* FT_AutoHinter_GlobalGetFunc(). This is the only way these hints */ - /* are freed from memory. */ - /* */ - /* */ - /* hinter :: A handle to the auto-hinter module. */ - /* */ - /* global :: A pointer to retrieved global hints to discard. */ - /* */ - typedef void - (*FT_AutoHinter_GlobalDoneFunc)( FT_AutoHinter hinter, - void* global ); - - - /*************************************************************************/ - /* */ - /* */ - /* FT_AutoHinter_GlobalResetFunc */ - /* */ - /* */ - /* This function is used to recompute the global metrics in a given */ - /* font. This is useful when global font data changes (e.g. Multiple */ - /* Masters fonts where blend coordinates change). */ - /* */ - /* */ - /* hinter :: A handle to the source auto-hinter. */ - /* */ - /* face :: A handle to the face. */ - /* */ - typedef void - (*FT_AutoHinter_GlobalResetFunc)( FT_AutoHinter hinter, - FT_Face face ); - - - /*************************************************************************/ - /* */ - /* */ - /* FT_AutoHinter_GlyphLoadFunc */ - /* */ - /* */ - /* This function is used to load, scale, and automatically hint a */ - /* glyph from a given face. */ - /* */ - /* */ - /* face :: A handle to the face. */ - /* */ - /* glyph_index :: The glyph index. */ - /* */ - /* load_flags :: The load flags. */ - /* */ - /* */ - /* This function is capable of loading composite glyphs by hinting */ - /* each sub-glyph independently (which improves quality). */ - /* */ - /* It will call the font driver with FT_Load_Glyph(), with */ - /* FT_LOAD_NO_SCALE set. */ - /* */ - typedef FT_Error - (*FT_AutoHinter_GlyphLoadFunc)( FT_AutoHinter hinter, - FT_GlyphSlot slot, - FT_Size size, - FT_UInt glyph_index, - FT_Int32 load_flags ); - - - /*************************************************************************/ - /* */ - /* */ - /* FT_AutoHinter_ServiceRec */ - /* */ - /* */ - /* The auto-hinter module's interface. */ - /* */ - typedef struct FT_AutoHinter_ServiceRec_ - { - FT_AutoHinter_GlobalResetFunc reset_face; - FT_AutoHinter_GlobalGetFunc get_global_hints; - FT_AutoHinter_GlobalDoneFunc done_global_hints; - FT_AutoHinter_GlyphLoadFunc load_glyph; - - } FT_AutoHinter_ServiceRec, *FT_AutoHinter_Service; - -#ifndef FT_CONFIG_OPTION_PIC - -#define FT_DEFINE_AUTOHINTER_SERVICE(class_, reset_face_, get_global_hints_, \ - done_global_hints_, load_glyph_) \ - FT_CALLBACK_TABLE_DEF \ - const FT_AutoHinter_ServiceRec class_ = \ - { \ - reset_face_, get_global_hints_, done_global_hints_, load_glyph_ \ - }; - -#else /* FT_CONFIG_OPTION_PIC */ - -#define FT_DEFINE_AUTOHINTER_SERVICE(class_, reset_face_, get_global_hints_, \ - done_global_hints_, load_glyph_) \ - void \ - FT_Init_Class_##class_( FT_Library library, \ - FT_AutoHinter_ServiceRec* clazz) \ - { \ - FT_UNUSED(library); \ - clazz->reset_face = reset_face_; \ - clazz->get_global_hints = get_global_hints_; \ - clazz->done_global_hints = done_global_hints_; \ - clazz->load_glyph = load_glyph_; \ - } - -#endif /* FT_CONFIG_OPTION_PIC */ - -FT_END_HEADER - -#endif /* __AUTOHINT_H__ */ - - -/* END */