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-/***************************************************************************/
-/* */
-/* ahtypes.h */
-/* */
-/* General types and definitions for the auto-hint module */
-/* (specification only). */
-/* */
-/* Copyright 2000-2001, 2002, 2003, 2004 Catharon Productions Inc. */
-/* Author: David Turner */
-/* */
-/* This file is part of the Catharon Typography Project and shall only */
-/* be used, modified, and distributed under the terms of the Catharon */
-/* Open Source License that should come with this file under the name */
-/* `CatharonLicense.txt'. By continuing to use, modify, or distribute */
-/* this file you indicate that you have read the license and */
-/* understand and accept it fully. */
-/* */
-/* Note that this license is compatible with the FreeType license. */
-/* */
-/***************************************************************************/
-
-
-#ifndef __AHTYPES_H__
-#define __AHTYPES_H__
-
-
-#include <ft2build.h>
-#include FT_INTERNAL_OBJECTS_H
-
-#ifdef DEBUG_HINTER
-#include <../src/autohint/ahloader.h>
-#else
-#include "ahloader.h"
-#endif
-
-
-#define xxAH_DEBUG
-
-
-#ifdef AH_DEBUG
-
-#include <stdio.h>
-#define AH_LOG( x ) printf ## x
-
-#else
-
-#define AH_LOG( x ) do ; while ( 0 ) /* nothing */
-
-#endif /* AH_DEBUG */
-
-
-FT_BEGIN_HEADER
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /**** ****/
- /**** COMPILE-TIME BUILD OPTIONS ****/
- /**** ****/
- /**** Toggle these configuration macros to experiment with `features' ****/
- /**** of the auto-hinter. ****/
- /**** ****/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /*************************************************************************/
- /* */
- /* If this option is defined, only strong interpolation will be used to */
- /* place the points between edges. Otherwise, `smooth' points are */
- /* detected and later hinted through weak interpolation to correct some */
- /* unpleasant artefacts. */
- /* */
-#undef AH_OPTION_NO_WEAK_INTERPOLATION
-
-
- /*************************************************************************/
- /* */
- /* Undefine this macro if you don't want to hint the metrics. There is */
- /* no reason to do this (at least for non-CJK scripts), except for */
- /* experimentation. */
- /* */
-#undef AH_HINT_METRICS
-
-
- /*************************************************************************/
- /* */
- /* Define this macro if you do not want to insert extra edges at a */
- /* glyph's x and y extremum (if there isn't one already available). */
- /* This helps to reduce a number of artefacts and allows hinting of */
- /* metrics. */
- /* */
-#undef AH_OPTION_NO_EXTREMUM_EDGES
-
-
- /* don't touch for now */
-#define AH_MAX_WIDTHS 12
-#define AH_MAX_HEIGHTS 12
-
-
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
- /**** ****/
- /**** TYPE DEFINITIONS ****/
- /**** ****/
- /*************************************************************************/
- /*************************************************************************/
- /*************************************************************************/
-
-
- /* see ahangles.h */
- typedef FT_Int AH_Angle;
-
-
- /* hint flags */
-#define AH_FLAG_NONE 0
-
- /* bezier control points flags */
-#define AH_FLAG_CONIC 1
-#define AH_FLAG_CUBIC 2
-#define AH_FLAG_CONTROL ( AH_FLAG_CONIC | AH_FLAG_CUBIC )
-
- /* extrema flags */
-#define AH_FLAG_EXTREMA_X 4
-#define AH_FLAG_EXTREMA_Y 8
-
- /* roundness */
-#define AH_FLAG_ROUND_X 16
-#define AH_FLAG_ROUND_Y 32
-
- /* touched */
-#define AH_FLAG_TOUCH_X 64
-#define AH_FLAG_TOUCH_Y 128
-
- /* weak interpolation */
-#define AH_FLAG_WEAK_INTERPOLATION 256
-#define AH_FLAG_INFLECTION 512
-
- typedef FT_Int AH_Flags;
-
-
- /* edge hint flags */
-#define AH_EDGE_NORMAL 0
-#define AH_EDGE_ROUND 1
-#define AH_EDGE_SERIF 2
-#define AH_EDGE_DONE 4
-
- typedef FT_Int AH_Edge_Flags;
-
-
- /* hint directions -- the values are computed so that two vectors are */
- /* in opposite directions iff `dir1+dir2 == 0' */
-#define AH_DIR_NONE 4
-#define AH_DIR_RIGHT 1
-#define AH_DIR_LEFT -1
-#define AH_DIR_UP 2
-#define AH_DIR_DOWN -2
-
- typedef FT_Int AH_Direction;
-
-
- typedef struct AH_PointRec_* AH_Point;
- typedef struct AH_SegmentRec_* AH_Segment;
- typedef struct AH_EdgeRec_* AH_Edge;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* AH_PointRec */
- /* */
- /* <Description> */
- /* A structure used to model an outline point to the AH_OutlineRec */
- /* type. */
- /* */
- /* <Fields> */
- /* flags :: The current point hint flags. */
- /* */
- /* ox, oy :: The current original scaled coordinates. */
- /* */
- /* fx, fy :: The current coordinates in font units. */
- /* */
- /* x, y :: The current hinted coordinates. */
- /* */
- /* u, v :: Point coordinates -- meaning varies with context. */
- /* */
- /* in_dir :: The direction of the inwards vector (prev->point). */
- /* */
- /* out_dir :: The direction of the outwards vector (point->next). */
- /* */
- /* next :: The next point in same contour. */
- /* */
- /* prev :: The previous point in same contour. */
- /* */
- typedef struct AH_PointRec_
- {
- AH_Flags flags; /* point flags used by hinter */
- FT_Pos ox, oy;
- FT_Pos fx, fy;
- FT_Pos x, y;
- FT_Pos u, v;
-
- AH_Direction in_dir; /* direction of inwards vector */
- AH_Direction out_dir; /* direction of outwards vector */
-
- AH_Point next; /* next point in contour */
- AH_Point prev; /* previous point in contour */
-
- } AH_PointRec;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* AH_SegmentRec */
- /* */
- /* <Description> */
- /* A structure used to describe an edge segment to the auto-hinter. */
- /* A segment is simply a sequence of successive points located on the */
- /* same horizontal or vertical `position', in a given direction. */
- /* */
- /* <Fields> */
- /* flags :: The segment edge flags (straight, rounded, etc.). */
- /* */
- /* dir :: The segment direction. */
- /* */
- /* min_coord :: The minimum coordinate of the segment. */
- /* */
- /* max_coord :: The maximum coordinate of the segment. */
- /* */
- /* edge :: The edge of the current segment. */
- /* */
- /* edge_next :: The next segment on the same edge. */
- /* */
- /* link :: The pairing segment for this edge. */
- /* */
- /* serif :: The primary segment for serifs. */
- /* */
- /* num_linked :: The number of other segments that link to this one. */
- /* */
- /* score :: Used to score the segment when selecting them. */
- /* */
- /* first :: The first point in the segment. */
- /* */
- /* last :: The last point in the segment. */
- /* */
- /* contour :: A pointer to the first point of the segment's */
- /* contour. */
- /* */
- typedef struct AH_SegmentRec_
- {
- AH_Edge_Flags flags;
- AH_Direction dir;
- FT_Pos pos; /* position of segment */
- FT_Pos min_coord; /* minimum coordinate of segment */
- FT_Pos max_coord; /* maximum coordinate of segment */
-
- AH_Edge edge;
- AH_Segment edge_next;
-
- AH_Segment link; /* link segment */
- AH_Segment serif; /* primary segment for serifs */
- FT_Pos num_linked; /* number of linked segments */
- FT_Pos score;
-
- AH_Point first; /* first point in edge segment */
- AH_Point last; /* last point in edge segment */
- AH_Point* contour; /* ptr to first point of segment's contour */
-
- } AH_SegmentRec;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* AH_EdgeRec */
- /* */
- /* <Description> */
- /* A structure used to describe an edge, which really is a horizontal */
- /* or vertical coordinate to be hinted depending on the segments */
- /* located on it. */
- /* */
- /* <Fields> */
- /* fpos :: The original edge position in font units. */
- /* */
- /* opos :: The original scaled edge position. */
- /* */
- /* pos :: The hinted edge position. */
- /* */
- /* flags :: The segment edge flags (straight, rounded, etc.). */
- /* */
- /* dir :: The main segment direction on this edge. */
- /* */
- /* scale :: Scaling factor between original and hinted edge */
- /* positions. */
- /* */
- /* blue_edge :: Indicate the blue zone edge this edge is related to. */
- /* Only set for some of the horizontal edges in a latin */
- /* font. */
- /* */
- /* link :: The linked edge. */
- /* */
- /* serif :: The serif edge. */
- /* */
- /* num_linked :: The number of other edges that pair to this one. */
- /* */
- /* score :: Used to score the edge when selecting them. */
- /* */
- /* first :: The first edge segment. */
- /* */
- /* last :: The last edge segment. */
- /* */
- typedef struct AH_EdgeRec_
- {
- FT_Pos fpos;
- FT_Pos opos;
- FT_Pos pos;
-
- AH_Edge_Flags flags;
- AH_Direction dir;
- FT_Fixed scale;
- FT_Pos* blue_edge;
-
- AH_Edge link;
- AH_Edge serif;
- FT_Int num_linked;
-
- FT_Int score;
-
- AH_Segment first;
- AH_Segment last;
-
-
- } AH_EdgeRec;
-
-
- /* an outline as seen by the hinter */
- typedef struct AH_OutlineRec_
- {
- FT_Memory memory;
-
- AH_Direction vert_major_dir; /* vertical major direction */
- AH_Direction horz_major_dir; /* horizontal major direction */
-
- FT_Fixed x_scale;
- FT_Fixed y_scale;
- FT_Pos edge_distance_threshold;
-
- FT_Int max_points;
- FT_Int num_points;
- AH_Point points;
-
- FT_Int max_contours;
- FT_Int num_contours;
- AH_Point* contours;
-
- FT_Int num_hedges;
- AH_Edge horz_edges;
-
- FT_Int num_vedges;
- AH_Edge vert_edges;
-
- FT_Int num_hsegments;
- AH_Segment horz_segments;
-
- FT_Int num_vsegments;
- AH_Segment vert_segments;
-
- } AH_OutlineRec, *AH_Outline;
-
-
-#ifdef FT_CONFIG_CHESTER_SMALL_F
-
-#define AH_BLUE_CAPITAL_TOP 0 /* THEZOCQS */
-#define AH_BLUE_CAPITAL_BOTTOM ( AH_BLUE_CAPITAL_TOP + 1 ) /* HEZLOCUS */
-#define AH_BLUE_SMALL_F_TOP ( AH_BLUE_CAPITAL_BOTTOM + 1 ) /* fijkdbh */
-#define AH_BLUE_SMALL_TOP ( AH_BLUE_SMALL_F_TOP + 1 ) /* xzroesc */
-#define AH_BLUE_SMALL_BOTTOM ( AH_BLUE_SMALL_TOP + 1 ) /* xzroesc */
-#define AH_BLUE_SMALL_MINOR ( AH_BLUE_SMALL_BOTTOM + 1 ) /* pqgjy */
-#define AH_BLUE_MAX ( AH_BLUE_SMALL_MINOR + 1 )
-
-#else /* !FT_CONFIG_CHESTER_SMALL_F */
-
-#define AH_BLUE_CAPITAL_TOP 0 /* THEZOCQS */
-#define AH_BLUE_CAPITAL_BOTTOM ( AH_BLUE_CAPITAL_TOP + 1 ) /* HEZLOCUS */
-#define AH_BLUE_SMALL_TOP ( AH_BLUE_CAPITAL_BOTTOM + 1 ) /* xzroesc */
-#define AH_BLUE_SMALL_BOTTOM ( AH_BLUE_SMALL_TOP + 1 ) /* xzroesc */
-#define AH_BLUE_SMALL_MINOR ( AH_BLUE_SMALL_BOTTOM + 1 ) /* pqgjy */
-#define AH_BLUE_MAX ( AH_BLUE_SMALL_MINOR + 1 )
-
-#endif /* !FT_CONFIG_CHESTER_SMALL_F */
-
- typedef FT_Int AH_Blue;
-
-
-#define AH_HINTER_MONOCHROME 1
-#define AH_HINTER_OPTIMIZE 2
-
- typedef FT_Int AH_Hinter_Flags;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* AH_GlobalsRec */
- /* */
- /* <Description> */
- /* Holds the global metrics for a given font face (be it in design */
- /* units or scaled pixel values). */
- /* */
- /* <Fields> */
- /* num_widths :: The number of widths. */
- /* */
- /* num_heights :: The number of heights. */
- /* */
- /* stds :: A two-element array giving the default stem width */
- /* and height. */
- /* */
- /* widths :: Snap widths, including standard one. */
- /* */
- /* heights :: Snap height, including standard one. */
- /* */
- /* blue_refs :: The reference positions of blue zones. */
- /* */
- /* blue_shoots :: The overshoot positions of blue zones. */
- /* */
- typedef struct AH_GlobalsRec_
- {
- FT_Int num_widths;
- FT_Int num_heights;
-
- FT_Pos stds[2];
-
- FT_Pos widths [AH_MAX_WIDTHS];
- FT_Pos heights[AH_MAX_HEIGHTS];
-
- FT_Pos blue_refs [AH_BLUE_MAX];
- FT_Pos blue_shoots[AH_BLUE_MAX];
-
- } AH_GlobalsRec, *AH_Globals;
-
-
- /*************************************************************************/
- /* */
- /* <Struct> */
- /* AH_Face_GlobalsRec */
- /* */
- /* <Description> */
- /* Holds the complete global metrics for a given font face (i.e., the */
- /* design units version + a scaled version + the current scales */
- /* used). */
- /* */
- /* <Fields> */
- /* face :: A handle to the source face object */
- /* */
- /* design :: The globals in font design units. */
- /* */
- /* scaled :: Scaled globals in sub-pixel values. */
- /* */
- /* x_scale :: The current horizontal scale. */
- /* */
- /* y_scale :: The current vertical scale. */
- /* */
- /* control_overshoot :: */
- /* Currently unused. */
- /* */
- typedef struct AH_Face_GlobalsRec_
- {
- FT_Face face;
- AH_GlobalsRec design;
- AH_GlobalsRec scaled;
- FT_Fixed x_scale;
- FT_Fixed y_scale;
- FT_Bool control_overshoot;
-
- } AH_Face_GlobalsRec, *AH_Face_Globals;
-
-
- typedef struct AH_HinterRec_
- {
- FT_Memory memory;
- AH_Hinter_Flags flags;
-
- FT_Int algorithm;
- FT_Face face;
-
- AH_Face_Globals globals;
-
- AH_Outline glyph;
-
- AH_Loader loader;
- FT_Vector pp1; /* horizontal phantom points */
- FT_Vector pp2;
- /* we ignore vertical phantom points */
-
- FT_Bool transformed;
- FT_Vector trans_delta;
- FT_Matrix trans_matrix;
-
- FT_Bool do_horz_hints; /* disable X hinting */
- FT_Bool do_vert_hints; /* disable Y hinting */
- FT_Bool do_horz_snapping; /* disable X stem size snapping */
- FT_Bool do_vert_snapping; /* disable Y stem size snapping */
- FT_Bool do_stem_adjust; /* disable light stem snapping */
-
- } AH_HinterRec, *AH_Hinter;
-
-
-#ifdef DEBUG_HINTER
- extern AH_Hinter ah_debug_hinter;
- extern FT_Bool ah_debug_disable_horz;
- extern FT_Bool ah_debug_disable_vert;
-#else
-#define ah_debug_disable_horz 0
-#define ah_debug_disable_vert 0
-#endif /* DEBUG_HINTER */
-
-
-FT_END_HEADER
-
-#endif /* __AHTYPES_H__ */
-
-
-/* END */
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