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-rw-r--r--src/autofit/afhints.h333
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diff --git a/src/autofit/afhints.h b/src/autofit/afhints.h
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--- a/src/autofit/afhints.h
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-/***************************************************************************/
-/* */
-/* afhints.h */
-/* */
-/* Auto-fitter hinting routines (specification). */
-/* */
-/* Copyright 2003, 2004, 2005, 2006, 2007, 2008 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. */
-/* */
-/***************************************************************************/
-
-
-#ifndef __AFHINTS_H__
-#define __AFHINTS_H__
-
-#include "aftypes.h"
-
-#define xxAF_SORT_SEGMENTS
-
-FT_BEGIN_HEADER
-
- /*
- * The definition of outline glyph hints. These are shared by all
- * script analysis routines (until now).
- */
-
- typedef enum AF_Dimension_
- {
- AF_DIMENSION_HORZ = 0, /* x coordinates, */
- /* i.e., vertical segments & edges */
- AF_DIMENSION_VERT = 1, /* y coordinates, */
- /* i.e., horizontal segments & edges */
-
- AF_DIMENSION_MAX /* do not remove */
-
- } AF_Dimension;
-
-
- /* hint directions -- the values are computed so that two vectors are */
- /* in opposite directions iff `dir1 + dir2 == 0' */
- typedef enum AF_Direction_
- {
- AF_DIR_NONE = 4,
- AF_DIR_RIGHT = 1,
- AF_DIR_LEFT = -1,
- AF_DIR_UP = 2,
- AF_DIR_DOWN = -2
-
- } AF_Direction;
-
-
- /* point hint flags */
- typedef enum AF_Flags_
- {
- AF_FLAG_NONE = 0,
-
- /* point type flags */
- AF_FLAG_CONIC = 1 << 0,
- AF_FLAG_CUBIC = 1 << 1,
- AF_FLAG_CONTROL = AF_FLAG_CONIC | AF_FLAG_CUBIC,
-
- /* point extremum flags */
- AF_FLAG_EXTREMA_X = 1 << 2,
- AF_FLAG_EXTREMA_Y = 1 << 3,
-
- /* point roundness flags */
- AF_FLAG_ROUND_X = 1 << 4,
- AF_FLAG_ROUND_Y = 1 << 5,
-
- /* point touch flags */
- AF_FLAG_TOUCH_X = 1 << 6,
- AF_FLAG_TOUCH_Y = 1 << 7,
-
- /* candidates for weak interpolation have this flag set */
- AF_FLAG_WEAK_INTERPOLATION = 1 << 8,
-
- /* all inflection points in the outline have this flag set */
- AF_FLAG_INFLECTION = 1 << 9
-
- } AF_Flags;
-
-
- /* edge hint flags */
- typedef enum AF_Edge_Flags_
- {
- AF_EDGE_NORMAL = 0,
- AF_EDGE_ROUND = 1 << 0,
- AF_EDGE_SERIF = 1 << 1,
- AF_EDGE_DONE = 1 << 2
-
- } AF_Edge_Flags;
-
-
- typedef struct AF_PointRec_* AF_Point;
- typedef struct AF_SegmentRec_* AF_Segment;
- typedef struct AF_EdgeRec_* AF_Edge;
-
-
- typedef struct AF_PointRec_
- {
- FT_UShort flags; /* point flags used by hinter */
- FT_Char in_dir; /* direction of inwards vector */
- FT_Char out_dir; /* direction of outwards vector */
-
- FT_Pos ox, oy; /* original, scaled position */
- FT_Short fx, fy; /* original, unscaled position (font units) */
- FT_Pos x, y; /* current position */
- FT_Pos u, v; /* current (x,y) or (y,x) depending on context */
-
- AF_Point next; /* next point in contour */
- AF_Point prev; /* previous point in contour */
-
- } AF_PointRec;
-
-
- typedef struct AF_SegmentRec_
- {
- FT_Byte flags; /* edge/segment flags for this segment */
- FT_Char dir; /* segment direction */
- FT_Short pos; /* position of segment */
- FT_Short min_coord; /* minimum coordinate of segment */
- FT_Short max_coord; /* maximum coordinate of segment */
- FT_Short height; /* the hinted segment height */
-
- AF_Edge edge; /* the segment's parent edge */
- AF_Segment edge_next; /* link to next segment in parent edge */
-
- AF_Segment link; /* (stem) link segment */
- AF_Segment serif; /* primary segment for serifs */
- FT_Pos num_linked; /* number of linked segments */
- FT_Pos score; /* used during stem matching */
- FT_Pos len; /* used during stem matching */
-
- AF_Point first; /* first point in edge segment */
- AF_Point last; /* last point in edge segment */
- AF_Point* contour; /* ptr to first point of segment's contour */
-
- } AF_SegmentRec;
-
-
- typedef struct AF_EdgeRec_
- {
- FT_Short fpos; /* original, unscaled position (font units) */
- FT_Pos opos; /* original, scaled position */
- FT_Pos pos; /* current position */
-
- FT_Byte flags; /* edge flags */
- FT_Char dir; /* edge direction */
- FT_Fixed scale; /* used to speed up interpolation between edges */
- AF_Width blue_edge; /* non-NULL if this is a blue edge */
-
- AF_Edge link;
- AF_Edge serif;
- FT_Short num_linked;
-
- FT_Int score;
-
- AF_Segment first;
- AF_Segment last;
-
- } AF_EdgeRec;
-
-
- typedef struct AF_AxisHintsRec_
- {
- FT_Int num_segments;
- FT_Int max_segments;
- AF_Segment segments;
-#ifdef AF_SORT_SEGMENTS
- FT_Int mid_segments;
-#endif
-
- FT_Int num_edges;
- FT_Int max_edges;
- AF_Edge edges;
-
- AF_Direction major_dir;
-
- } AF_AxisHintsRec, *AF_AxisHints;
-
-
- typedef struct AF_GlyphHintsRec_
- {
- FT_Memory memory;
-
- FT_Fixed x_scale;
- FT_Pos x_delta;
-
- FT_Fixed y_scale;
- FT_Pos y_delta;
-
- FT_Pos edge_distance_threshold;
-
- FT_Int max_points;
- FT_Int num_points;
- AF_Point points;
-
- FT_Int max_contours;
- FT_Int num_contours;
- AF_Point* contours;
-
- AF_AxisHintsRec axis[AF_DIMENSION_MAX];
-
- FT_UInt32 scaler_flags; /* copy of scaler flags */
- FT_UInt32 other_flags; /* free for script-specific */
- /* implementations */
- AF_ScriptMetrics metrics;
-
- FT_Pos xmin_delta; /* used for warping */
- FT_Pos xmax_delta;
-
- } AF_GlyphHintsRec;
-
-
-#define AF_HINTS_TEST_SCALER( h, f ) ( (h)->scaler_flags & (f) )
-#define AF_HINTS_TEST_OTHER( h, f ) ( (h)->other_flags & (f) )
-
-
-#ifdef AF_DEBUG
-
-#define AF_HINTS_DO_HORIZONTAL( h ) \
- ( !_af_debug_disable_horz_hints && \
- !AF_HINTS_TEST_SCALER( h, AF_SCALER_FLAG_NO_HORIZONTAL ) )
-
-#define AF_HINTS_DO_VERTICAL( h ) \
- ( !_af_debug_disable_vert_hints && \
- !AF_HINTS_TEST_SCALER( h, AF_SCALER_FLAG_NO_VERTICAL ) )
-
-#define AF_HINTS_DO_ADVANCE( h ) \
- !AF_HINTS_TEST_SCALER( h, AF_SCALER_FLAG_NO_ADVANCE )
-
-#define AF_HINTS_DO_BLUES( h ) ( !_af_debug_disable_blue_hints )
-
-#else /* !AF_DEBUG */
-
-#define AF_HINTS_DO_HORIZONTAL( h ) \
- !AF_HINTS_TEST_SCALER( h, AF_SCALER_FLAG_NO_HORIZONTAL )
-
-#define AF_HINTS_DO_VERTICAL( h ) \
- !AF_HINTS_TEST_SCALER( h, AF_SCALER_FLAG_NO_VERTICAL )
-
-#define AF_HINTS_DO_ADVANCE( h ) \
- !AF_HINTS_TEST_SCALER( h, AF_SCALER_FLAG_NO_ADVANCE )
-
-#define AF_HINTS_DO_BLUES( h ) 1
-
-#endif /* !AF_DEBUG */
-
-
- FT_LOCAL( AF_Direction )
- af_direction_compute( FT_Pos dx,
- FT_Pos dy );
-
-
- FT_LOCAL( FT_Error )
- af_axis_hints_new_segment( AF_AxisHints axis,
- FT_Memory memory,
- AF_Segment *asegment );
-
- FT_LOCAL( FT_Error)
- af_axis_hints_new_edge( AF_AxisHints axis,
- FT_Int fpos,
- AF_Direction dir,
- FT_Memory memory,
- AF_Edge *edge );
-
- FT_LOCAL( void )
- af_glyph_hints_init( AF_GlyphHints hints,
- FT_Memory memory );
-
-
-
- /*
- * recompute all AF_Point in a AF_GlyphHints from the definitions
- * in a source outline
- */
- FT_LOCAL( void )
- af_glyph_hints_rescale( AF_GlyphHints hints,
- AF_ScriptMetrics metrics );
-
- FT_LOCAL( FT_Error )
- af_glyph_hints_reload( AF_GlyphHints hints,
- FT_Outline* outline,
- FT_Bool get_inflections );
-
- FT_LOCAL( void )
- af_glyph_hints_save( AF_GlyphHints hints,
- FT_Outline* outline );
-
- FT_LOCAL( void )
- af_glyph_hints_align_edge_points( AF_GlyphHints hints,
- AF_Dimension dim );
-
- FT_LOCAL( void )
- af_glyph_hints_align_strong_points( AF_GlyphHints hints,
- AF_Dimension dim );
-
- FT_LOCAL( void )
- af_glyph_hints_align_weak_points( AF_GlyphHints hints,
- AF_Dimension dim );
-
-#ifdef AF_USE_WARPER
- FT_LOCAL( void )
- af_glyph_hints_scale_dim( AF_GlyphHints hints,
- AF_Dimension dim,
- FT_Fixed scale,
- FT_Pos delta );
-#endif
-
- FT_LOCAL( void )
- af_glyph_hints_done( AF_GlyphHints hints );
-
-/* */
-
-#define AF_SEGMENT_LEN( seg ) ( (seg)->max_coord - (seg)->min_coord )
-
-#define AF_SEGMENT_DIST( seg1, seg2 ) ( ( (seg1)->pos > (seg2)->pos ) \
- ? (seg1)->pos - (seg2)->pos \
- : (seg2)->pos - (seg1)->pos )
-
-
-FT_END_HEADER
-
-#endif /* __AFHINTS_H__ */
-
-
-/* END */
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