#ifndef __AFHINTS_H__ | |
#define __AFHINTS_H__ | |
#include "aftypes.h" | |
FT_BEGIN_HEADER | |
/* | |
* The definition of outline glyph hints. These are shared by all | |
* script analysis routines (until now) | |
* | |
*/ | |
typedef enum | |
{ | |
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_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_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_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_ | |
{ | |
AF_Flags flags; /* point flags used by hinter */ | |
FT_Pos ox, oy; /* original, scaled position */ | |
FT_Pos 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_Direction in_dir; /* direction of inwards vector */ | |
AF_Direction out_dir; /* direction of outwards vector */ | |
AF_Point next; /* next point in contour */ | |
AF_Point prev; /* previous point in contour */ | |
} AF_PointRec; | |
typedef struct AF_SegmentRec_ | |
{ | |
AF_Edge_Flags flags; /* edge/segment flags for this segment */ | |
AF_Direction dir; /* segment direction */ | |
FT_Pos pos; /* position of segment */ | |
FT_Pos min_coord; /* minimum coordinate of segment */ | |
FT_Pos max_coord; /* maximum coordinate of segment */ | |
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 */ | |
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_Pos fpos; /* original, unscaled position (font units) */ | |
FT_Pos opos; /* original, scaled position */ | |
FT_Pos pos; /* current position */ | |
AF_Edge_Flags flags; /* edge flags */ | |
AF_Direction 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_Int num_linked; | |
FT_Int score; | |
AF_Segment first; | |
AF_Segment last; | |
} AF_EdgeRec; | |
typedef struct AF_AxisHintsRec_ | |
{ | |
FT_Int num_segments; | |
AF_Segment segments; | |
FT_Int num_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; | |
} AF_GlyphHintsRec; | |
#define AF_HINTS_TEST_SCALER(h,f) ( (h)->scaler_flags & (f) ) | |
#define AF_HINTS_TEST_OTHER(h,f) ( (h)->other_flags & (f) ) | |
#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) | |
FT_LOCAL( AF_Direction ) | |
af_direction_compute( FT_Pos dx, | |
FT_Pos dy ); | |
FT_LOCAL( void ) | |
af_glyph_hints_init( AF_GlyphHints hints, | |
FT_Memory memory ); | |
/* recomputes all AF_Point in a AF_GlyphHints from the definitions | |
* in a source outline | |
*/ | |
FT_LOCAL( FT_Error ) | |
af_glyph_hints_reset( AF_GlyphHints hints, | |
AF_Scaler scaler, | |
AF_ScriptMetrics metrics, | |
FT_Outline* outline ); | |
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 ); | |
FT_LOCAL( void ) | |
af_glyph_hints_done( AF_GlyphHints hints ); | |
/* */ | |
FT_END_HEADER | |
#endif /* __AFHINTS_H__ */ |