bd5ae40006
C++ programs easier: Renamed FT_WordXX to FT_UIntXX. Changed a lot of void* to FT_Byte* if related to i/o streams -- FreeType always accesses streams byte-wise, so this makes sense IMHO. Added a lot of #ifdef __cplusplus to header files (and removed a few). Other minor syntax fixes (mostly casts). Replaced the variable `private' with `private_dict' -- `private' is reserved in C++.
263 lines
13 KiB
C
263 lines
13 KiB
C
/***************************************************************************/
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/* */
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/* t1hinter.h */
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/* */
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/* Type 1 hinter (body). */
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/* */
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/* Copyright 1996-2000 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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/* */
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/* This file is part of the FreeType project, and may only be used, */
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/* modified, and distributed under the terms of the FreeType project */
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/* license, LICENSE.TXT. By continuing to use, modify, or distribute */
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/* this file you indicate that you have read the license and */
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/* understand and accept it fully. */
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/* */
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/***************************************************************************/
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#ifndef T1HINTER_H
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#define T1HINTER_H
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#include <t1objs.h>
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#include <t1gload.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* T1_Snap_Zone */
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/* */
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/* <Description> */
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/* A `snap zone' is used to model either a blue zone or a stem width */
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/* at a given character size. It is made of a minimum and maximum */
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/* edge, defined in 26.6 pixels, as well as an `original' and */
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/* `scaled' position. */
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/* */
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/* The position corresponds to the stem width (for stem snap zones) */
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/* or to the blue position (for blue zones). */
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/* */
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/* <Fields> */
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/* orus :: The original position in font units. */
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/* */
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/* pix :: The current position in sub-pixel units. */
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/* */
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/* min :: The minimum boundary in sub-pixel units. */
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/* */
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/* max :: The maximum boundary in sub-pixel units. */
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/* */
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typedef struct T1_Snap_Zone_
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{
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FT_Pos orus;
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FT_Pos pix;
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FT_Pos min;
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FT_Pos max;
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} T1_Snap_Zone;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* T1_Edge */
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/* */
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/* <Description> */
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/* A very simple structure used to model a stem edge. */
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/* */
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/* <Fields> */
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/* orus :: The original edge position in font units. */
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/* */
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/* pix :: The scaled edge position in sub-pixel units. */
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/* */
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typedef struct T1_Edge_
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{
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FT_Pos orus;
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FT_Pos pix;
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} T1_Edge;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* T1_Stem_Hint */
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/* */
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/* <Description> */
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/* A simple structure used to model a stem hint. */
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/* */
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/* <Fields> */
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/* min_edge :: The hint's minimum edge. */
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/* */
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/* max_edge :: The hint's maximum edge. */
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/* */
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/* hint_flags :: Some flags describing the stem properties. */
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/* */
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/* <Note> */
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/* The min and max edges of a ghost stem have the same position, even */
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/* if they are coded in a weird way in the charstrings. */
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/* */
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typedef struct T1_Stem_Hint_
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{
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T1_Edge min_edge;
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T1_Edge max_edge;
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FT_Int hint_flags;
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} T1_Stem_Hint;
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#define T1_HINT_FLAG_ACTIVE 1 /* indicates an active stem */
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#define T1_HINT_FLAG_MIN_BORDER 2 /* unused for now */
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#define T1_HINT_FLAG_MAX_BORDER 4 /* unused for now */
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/* hinter's configuration constants */
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#define T1_HINTER_MAX_BLUES 24 /* maximum number of blue zones */
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#define T1_HINTER_MAX_SNAPS 16 /* maximum number of stem snap zones */
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#define T1_HINTER_MAX_EDGES 64 /* maximum number of stem hints */
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* T1_Size_Hints */
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/* */
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/* <Description> */
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/* A structure used to model the hinting information related to a size */
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/* object. */
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/* */
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/* <Fields> */
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/* supress_overshoots :: A boolean flag to tell whether overshoot */
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/* supression should occur. */
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/* */
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/* num_blue_zones :: The total number of blue zones (top+bottom). */
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/* */
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/* num_bottom_zones :: The number of bottom zones. */
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/* */
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/* blue_zones :: The blue zones table. Bottom zones are */
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/* stored first in the table, followed by all */
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/* top zones. */
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/* */
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/* num_snap_widths :: The number of horizontal stem snap zones. */
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/* */
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/* snap_widths :: An array of horizontal stem snap zones. */
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/* */
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/* num_snap_heights :: The number of vertical stem snap zones. */
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/* */
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/* snap_heights :: An array of vertical stem snap zones. */
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/* */
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struct T1_Size_Hints_
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{
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FT_Bool supress_overshoots;
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FT_Int num_blue_zones;
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FT_Int num_bottom_zones;
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T1_Snap_Zone blue_zones[T1_HINTER_MAX_BLUES];
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FT_Int num_snap_widths;
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T1_Snap_Zone snap_widths[T1_HINTER_MAX_SNAPS];
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FT_Int num_snap_heights;
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T1_Snap_Zone snap_heights[T1_HINTER_MAX_SNAPS];
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};
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* T1_Stem_Table */
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/* */
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/* <Description> */
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/* A simple structure used to model a set of stem hints in a single */
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/* direction during the loading of a given glyph outline. Not all */
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/* stem hints are active at a time. Moreover, stems must be sorted */
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/* regularly. */
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/* */
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/* <Fields> */
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/* num_stems :: The total number of stems in the table. */
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/* */
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/* num_active :: The number of active stems in the table. */
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/* */
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/* stems :: A table of all stems. */
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/* */
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/* sort :: A table of indices into the stems table, used to */
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/* keep a sorted list of the active stems. */
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/* */
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typedef struct T1_Stem_Table_
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{
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FT_Int num_stems;
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FT_Int num_active;
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T1_Stem_Hint stems[T1_HINTER_MAX_EDGES];
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FT_Int sort [T1_HINTER_MAX_EDGES];
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} T1_Stem_Table;
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/*************************************************************************/
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/* */
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/* <Struct> */
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/* T1_Glyph_Hints */
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/* */
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/* <Description> */
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/* A structure used to model the stem hints of a given glyph outline */
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/* during glyph loading. */
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/* */
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/* <Fields> */
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/* hori_stems :: The horizontal stem hints table. */
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/* vert_stems :: The vertical stem hints table. */
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/* */
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struct T1_Glyph_Hints_
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{
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T1_Stem_Table hori_stems;
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T1_Stem_Table vert_stems;
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};
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/*************************************************************************/
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/* */
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/* <Data> */
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/* t1_hinter_funcs */
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/* */
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/* <Description> */
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/* A table containing the address of various functions used during */
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/* the loading of an hinted scaled outline. */
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/* */
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extern const T1_Hinter_Funcs t1_hinter_funcs;
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LOCAL_DEF
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FT_Error T1_New_Size_Hinter( T1_Size size );
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LOCAL_DEF
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void T1_Done_Size_Hinter( T1_Size size );
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LOCAL_DEF
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FT_Error T1_Reset_Size_Hinter( T1_Size size );
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LOCAL_DEF
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FT_Error T1_New_Glyph_Hinter( T1_GlyphSlot glyph );
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LOCAL_DEF
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void T1_Done_Glyph_Hinter( T1_GlyphSlot glyph );
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LOCAL_DEF
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void T1_Hint_Points( T1_Builder* builder );
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LOCAL_DEF
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void T1_Hint_Stems( T1_Builder* builder );
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#ifdef __cplusplus
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}
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#endif
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#endif /* T1HINTER_H */
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/* END */
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